Humidity control method, device, equipment and storage medium of steam cooking equipment

Abstract

The application belongs to the technical field of electrical appliances, and particularly relates to a humidity control method, device, equipment and storage medium of a steam cooking equipment, which comprises the following steps: obtaining a target dew point temperature of an inner container according to an ambient temperature of the steam cooking equipment and a target humidity of the inner container; obtaining a cooking control parameter of the steam cooking equipment according to a dew point temperature of the inner container of the steam cooking equipment and the target dew point temperature of the inner container; obtaining temperature change information of the inner container during the control of the humidity of the inner container of the steam cooking equipment according to the cooking control parameter, and judging whether the humidity of the inner container meets a cooking control parameter compensation condition according to the temperature change information of the inner container; if yes, obtaining a compensated cooking control parameter according to the temperature change information; and controlling the humidity of the inner container of the steam cooking equipment according to the compensated cooking control parameter. The application avoids the influence of the hysteresis or overshoot phenomenon of humidity control on the humidity control effect, and improves the accuracy and flexibility of humidity control.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electrical appliances, and particularly relates to a humidity control method, device, equipment and storage medium of a steam cooking equipment. BACKGROUND

[0002] With the improvement of people's living standards and the continuous pursuit of high-quality life, various steam cooking equipment with steaming function, such as steam ovens, steam and oven integrated ovens, and micro steam ovens, are widely used in people's life. In the steaming process, the steam cooking equipment usually uses a steam generator together with other heating devices to heat the food, so as to improve the heating rate of the equipment. However, when the amount of steam in the equipment is small, the heating device may cause the humidity in the equipment to be too small, and thus the food may be dehydrated and dried, affecting the cooking effect.

[0003] The existing steam cooking equipment usually configures a humidity sensor in the equipment to obtain the actual humidity in the equipment, and according to the target value of the humidity and the actual humidity in the equipment, determines the control parameter of the steam generator through a PID control algorithm, and controls the steam generator according to the determined control parameter, so as to maintain the actual humidity in the equipment near the target value, and avoid the situation that the humidity in the equipment is too small.

[0004] However, due to the high temperature and high humidity environment in the equipment during the steaming process, the service life of the humidity sensor is affected, and the condensate water on the surface of the humidity sensor also affects the accuracy of the humidity detection. By using the conventional PID control algorithm to adjust the humidity, there may be a certain hysteresis, or an overshoot phenomenon may occur, and the above factors will all affect the humidity control effect in the equipment. SUMMARY

[0005] The present application provides a humidity control method, device, equipment and storage medium of a steam cooking equipment, to solve the problem of hysteresis or poor accuracy of the humidity control of the steam cooking equipment.

[0006] In a first aspect, the present application provides a humidity control method of a steam cooking equipment, the method comprising:

[0007] obtaining a target dew point temperature of the inner container according to the ambient temperature of the steam cooking equipment and the target humidity of the inner container;

[0008] obtaining a cooking control parameter of the steam cooking equipment according to the dew point temperature of the inner container of the steam cooking equipment and the target dew point temperature of the inner container;

[0009] During the period of controlling the liner humidity of the steam cooking device according to the cooking control parameter, temperature change information of the liner is acquired, and whether the liner humidity satisfies a cooking control parameter compensation condition is determined according to the temperature change information of the liner;

[0010] If yes, a compensated cooking control parameter is acquired according to the temperature change information;

[0011] The liner humidity of the steam cooking device is controlled according to the compensated cooking control parameter.

[0012] Optionally, the acquiring of the temperature change information of the liner comprises:

[0013] The liner dew point temperature at each sampling time within a preset time length is acquired according to a preset sampling frequency;

[0014] A temperature deviation value at each sampling time is determined according to the liner dew point temperature at each sampling time and a liner target dew point temperature;

[0015] A temperature change trend and a temperature change rate of the liner dew point temperature are acquired according to the liner target dew point temperature and the liner dew point temperature at each sampling time;

[0016] The temperature deviation value at each sampling time, the temperature change trend and the temperature change rate are taken as the temperature change information of the liner.

[0017] Optionally, the cooking control parameter compensation condition comprises at least one of the following:

[0018] There is at least one continuous sampling time with a temperature deviation value greater than a preset deviation value;

[0019] The temperature change trend is a trend that the difference between the liner dew point temperature and the liner target dew point temperature increases;

[0020] The temperature change rate is less than a preset change rate.

[0021] Optionally, the steam cooking device comprises a steam generator, the steam generator is intermittently operated according to a humidification time length and a non-humidification time length, the sum of the humidification time length and the non-humidification time length is a preset humidification operation period; the cooking control parameter comprises the humidification time length; the acquiring of the compensated cooking control parameter according to the humidity change information comprises:

[0022] The liner dew point temperature at a current time is acquired;

[0023] A compensated humidification time length is determined according to the temperature change trend and the temperature change rate, and the liner dew point temperature at the current time;

[0024] According to the compensation humidification duration, an adjusted humidification duration is obtained.

[0025] Optionally, the steam cooking device comprises a water discharging device, the water discharging device is intermittently operated according to a water discharging duration and a non-water discharging duration, and a sum of the water discharging duration and the non-water discharging duration is a preset humidification operation period; the cooking control parameter comprises the water discharging duration; and the obtaining of the compensated cooking control parameter according to the humidity change information comprises:

[0026] The inner container dew point temperature at the current time is obtained.

[0027] According to the temperature change trend and the temperature change rate, and the inner container dew point temperature at the current time, the compensation water discharging duration is determined.

[0028] According to the compensation water discharging duration, an adjusted water discharging duration is obtained.

[0029] Optionally, the obtaining of the inner container target dew point temperature according to the ambient temperature of the steam cooking device and the inner container target humidity comprises:

[0030] According to the inner container target humidity and the ambient temperature, and a mapping relationship among the ambient temperature, the inner container humidity and the dew point temperature, a dew point temperature corresponding to the ambient temperature and the inner container target humidity is obtained as the inner container target dew point temperature.

[0031] Optionally, before the obtaining of the cooking control parameter of the steam cooking device according to the inner container dew point temperature of the steam cooking device and the inner container target dew point temperature, the method further comprises:

[0032] The initial temperature of a steam generator of the steam cooking device and the inner container target dew point temperature are obtained.

[0033] According to the initial temperature and the inner container target dew point temperature, a pre-humidification control parameter of the steam cooking device is determined.

[0034] According to the pre-humidification control parameter, the inner container humidity of the steam cooking device is controlled to perform pre-humidification processing on the inner container.

[0035] In a second aspect, the application provides a humidity control device of a steam cooking device, comprising:

[0036] The obtaining module is configured to obtain an inner container target dew point temperature according to an ambient temperature of the steam cooking device and an inner container target humidity, and obtain a cooking control parameter of the steam cooking device according to an inner container dew point temperature of the steam cooking device and the inner container target dew point temperature; and obtain temperature change information of the inner container during a period in which the inner container humidity of the steam cooking device is controlled according to the cooking control parameter.

[0037] The operation module is configured to determine whether the liner humidity satisfies a cooking control parameter compensation condition according to the temperature change information of the liner, and obtain a compensated cooking control parameter according to the temperature change information when the liner humidity satisfies the cooking control parameter compensation condition.

[0038] The control module is configured to control the liner humidity of the steam cooking device according to the compensated cooking control parameter.

[0039] In a third aspect, the present application provides an electronic device, comprising a processor and a memory connected with the processor in communication;

[0040] The memory stores computer execution instructions;

[0041] The processor executes the computer execution instructions stored in the memory to realize the method according to the first aspect.

[0042] In a fourth aspect, the present application provides a computer readable storage medium, wherein the computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by a processor to realize the method according to the first aspect.

[0043] In a fifth aspect, the present application provides a computer program product, comprising a computer program, wherein the computer program is executed by a processor to realize the method according to the first aspect.

[0044] The steam cooking device humidity control method, device, equipment and storage medium provided by the present application can obtain a liner target dew point temperature according to the ambient temperature of the steam cooking device and the liner target humidity, obtain a cooking control parameter of the steam cooking device according to the liner dew point temperature of the steam cooking device and the liner target dew point temperature, obtain temperature change information of the liner during the period of controlling the liner humidity of the steam cooking device according to the cooking control parameter, determine whether the liner humidity satisfies a cooking control parameter compensation condition according to the temperature change information of the liner, obtain a compensated cooking control parameter according to the temperature change information if the liner humidity satisfies the cooking control parameter compensation condition, and control the liner humidity of the steam cooking device according to the compensated cooking control parameter, thereby avoiding the hysteresis or overshoot phenomenon of humidity control affecting the cooking effect and improving the accuracy and flexibility of humidity control. BRIEF DESCRIPTION OF DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0046] Figure 1a A hardware structure schematic diagram of a steam cooking device provided by the present application is shown in the figure;

[0047] Figure 1b for Figure 1a A magnified view of the steam cooking equipment at point A in the image;

[0048] Figure 2 A schematic flowchart of the humidity control method for the steam cooking equipment provided in this application;

[0049] Figure 3 Flowchart of the humidity control method for the steam cooking equipment provided in this application Figure Two ;

[0050] Figure 4 A schematic diagram of the humidity control device for a steam cooking equipment provided in this application;

[0051] Figure 5 This is a schematic diagram of the structure of an electronic device provided in this application.

[0052] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] With the improvement of people's living standards and their continuous pursuit of a high-quality life, various steam cooking equipment with steaming functions, such as steam ovens, steam-oven combos, and microwave-steam ovens, are widely used in people's lives. During the steaming process, steam cooking equipment usually uses a steam generator and other heating devices to heat the food together to increase the heating rate. However, when the amount of steam inside the equipment is small, the heating devices may cause the internal humidity to be too low, resulting in food losing moisture and drying out, which affects the cooking effect.

[0055] Existing steam cooking equipment typically uses a humidity sensor inside the equipment to obtain the actual humidity inside the equipment. Based on the target humidity value and the actual humidity inside the equipment, a PID control algorithm is used to determine the control parameters of the steam generator. The steam generator is then controlled according to the determined control parameters to maintain the actual humidity inside the equipment near the target value and avoid the situation where the humidity inside the equipment is too low.

[0056] However, due to the high temperature and high humidity in the internal environment of the equipment during the steaming process, the service life of the humidity sensor will be affected, and the condensation water on the surface of the humidity sensor will also affect the accuracy of humidity detection. By using the conventional PID control algorithm to adjust the humidity, there may be a certain hysteresis or overshoot phenomenon, and the above factors will all affect the humidity control effect in the equipment.

[0057] To solve the above problems, the present application proposes the following technical concept: Since there is a certain mapping relationship between the environmental temperature, dew point temperature and relative humidity in the same space, the relative humidity can be calculated by knowing the environmental temperature and dew point temperature, and then the dew point temperature can be used as a representative quantity of the relative humidity, and the relative humidity can be indirectly measured through the dew point temperature. Based on this, a condensation device can be provided on the cooking equipment, and the inner container of the equipment is connected to the external environment of the equipment through the condensation device, so that the air in the inner container can enter the condensation device. The humidity control device can obtain the inner container dew point temperature of the air in the inner container of the steam cooking equipment through the temperature sensor arranged on the condensation device. According to the environmental temperature around the condensation device, that is, the environmental temperature of the steam cooking equipment, and the target humidity of the inner container, the dew point temperature of the air in the inner container when the relative humidity reaches the target humidity is obtained as the target dew point temperature of the inner container. According to the inner container dew point temperature of the steam cooking equipment and the target dew point temperature of the inner container and the difference therebetween, the cooking control parameter of the steam cooking equipment is determined through the PID control algorithm. During the control of the humidity of the inner container of the steam cooking equipment according to the cooking control parameter, the temperature change information of the inner container is obtained, and whether the humidity of the inner container meets the cooking control parameter compensation condition is judged according to the temperature change information of the inner container. If yes, the compensated cooking control parameter is obtained according to the humidity change information. The humidity of the inner container of the steam cooking equipment is controlled according to the compensated cooking control parameter, so as to avoid the hysteresis or overshoot phenomenon caused by the PID control algorithm affecting the humidity control effect, and improve the accuracy and flexibility of the humidity control.

[0058] Figure 1a A hardware structure schematic diagram of a steam cooking equipment provided by an embodiment of the present application is shown in Figure 1b A partial enlarged view of the steam cooking equipment in A in Figure 1a Figure 1a Figure 1b ​​As shown, the steam cooking device 100 is configured with a dew point temperature detection device 101, which includes an air duct 1010, a condensation fin 1011, a temperature sensor 1012 and a fan 1013. The fan 1013 and the condensation fin 1011 are located in the air duct 1010, and the temperature sensor 1012 is located in the condensation fin 1011. The inner container of the device is in communication with the external environment through the air duct 1010, and the fan 1013 is used to reduce the temperature in the air duct 1010 so as to form condensation water droplets on the condensation fin 1011. The temperature measured by the temperature sensor 1012 is the dew point temperature of the inner container. The humidity control device of the steam cooking device can obtain the ambient temperature of the steam cooking device through the temperature sensor arranged around the condensation device. According to the ambient temperature and the dew point temperature of the inner container, the humidity of the inner container can be calculated. The steam cooking device 100 is also configured with a dehumidification air duct 102. The inner container of the cooking device is connected with a dehumidification fan and a condensation air duct at the top of the steam cooking device 100 through the dehumidification air duct 102. When the dehumidification fan operates, the humid hot air in the inner container enters the condensation air duct through the dehumidification air duct 102, so that the humidity of the inner container decreases.

[0059] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific examples. The following specific examples can exist independently or in combination. For the same or similar concepts or processes, some examples may not be described again. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0060] Figure 2 The flowchart of the humidity control method of the steam cooking device provided by the embodiments of the present application is shown in Figure 1. As shown in Figure 1, the humidity control method of the steam cooking device provided by the embodiments of the present application comprises the following steps. Figure 2

[0061] S201: According to the ambient temperature of the steam cooking device and the target humidity of the inner container, the target dew point temperature of the inner container is obtained.

[0062] Specifically, the humidity control device of the steam cooking device obtains the ambient temperature through the temperature sensor arranged around the condensation device. According to the cooking program information of the steam cooking device, the humidity of the inner container indicated by the cooking program information is obtained as the target humidity of the inner container. According to the corresponding relationship between different humidity of the inner container and different dew point temperature of the inner container under the ambient temperature, the dew point temperature corresponding to the target humidity of the inner container is obtained as the target dew point temperature of the inner container.

[0063] S202: According to the dew point temperature of the inner container of the steam cooking device and the target dew point temperature of the inner container, the cooking control parameter of the steam cooking device is obtained.

[0064] ​The cooking control parameter of the steam cooking device is used to control the humidity of the inner container, for example, can be the running time length of the steam generator, the running power of the steam generator, the running time length of the dehumidification motor, the running rotating speed of the dehumidification fan, etc. The specific type of the cooking control parameter is not particularly limited in the embodiments of the present application.

[0065] Specifically, the humidity control device of the steam cooking device acquires the temperature of the condensing device through the temperature sensor arranged on the condensing device according to a certain sampling frequency, for example, can be once every 30 seconds, that is, the inner container dew point temperature of the steam cooking device, and takes the difference between the inner container dew point temperature obtained at each sampling time and the target dew point temperature as the control deviation value, so as to represent the gap between the inner container humidity and the target humidity of the inner container through the difference between the inner container dew point temperature and the target dew point temperature. The control deviation value is input to the PID controller, and the PID controller determines the cooking control parameter of the steam cooking device according to the preset PID control algorithm, and outputs the cooking control parameter to the humidity control device.

[0066] S203: During the control of the humidity of the inner container of the steam cooking device according to the cooking control parameter, the temperature change information of the inner container is acquired.

[0067] Specifically, while the humidity control device of the steam cooking device controls the corresponding device of the steam cooking device according to the cooking control parameter, the humidity control device acquires the temperature of the condensing device through the temperature sensor arranged on the condensing device, and determines the temperature change information of the inner container according to the inner container dew point temperature acquired at each sampling time. The temperature change information is used to indicate the change of the inner container dew point temperature during the control of the steam cooking device according to the cooking control parameter, for example, can be the temperature reaching period and the non-temperature reaching period of the inner container dew point temperature, also can be the curve of the change of the inner container dew point temperature with time, etc. The specific content and form of the temperature change information is not particularly limited in the embodiments of the present application.

[0068] S204: According to the temperature change information of the inner container, it is judged whether the humidity of the inner container meets the cooking control parameter compensation condition.

[0069] Specifically, the humidity control device judges whether the temperature change information meets the cooking control parameter compensation condition according to the preset cooking control parameter compensation condition. The cooking control parameter compensation condition, for example, can be the time length threshold of the non-temperature reaching period of the inner container dew point temperature, also can be the fitting slope threshold of the curve of the change of the inner container dew point temperature with time, etc. The specific content and form of the cooking control parameter compensation condition is not particularly limited in the embodiments of the present application.

[0070] S205: If not, continue to control the humidity of the inner container of the steam cooking device according to the cooking control parameter.

[0071] Specifically, when it is determined that the liner humidity does not satisfy the cooking control parameter compensation condition, the temperature control device sends a control instruction to the corresponding humidity adjusting device of the steam cooking device according to the cooking control parameter, so that the corresponding humidity adjusting device continues to operate according to the cooking control parameter.

[0072] S206: If yes, the compensated cooking control parameter is obtained according to the temperature change information.

[0073] Specifically, when it is determined that the liner humidity satisfies the cooking control parameter compensation condition, the temperature control device obtains a cooking control parameter compensation value corresponding to the temperature change information according to a preset mapping relationship between different temperature change information and different cooking control parameter compensation values, for example, a function taking the difference between the liner dew point temperature and the target dew point temperature as the independent variable and the operating power of the steam generator and the dehumidification motor as the dependent variable, and the specific content and form of the preset mapping relationship are not particularly limited in the embodiments of the present application; and the corresponding cooking control parameter value is compensated according to the cooking control parameter compensation value to obtain the compensated cooking control parameter.

[0074] S207: The liner humidity of the steam cooking device is controlled according to the compensated cooking control parameter.

[0075] Specifically, the humidity control device sends a control instruction to the corresponding humidity adjusting device of the steam cooking device according to the compensated cooking control parameter, so that the corresponding humidity adjusting device operates according to the compensated cooking control parameter, so that the liner humidity of the steam cooking device reaches the liner target humidity.

[0076] The humidity control method of the steam cooking device provided by the embodiments of the present application obtains the liner dew point temperature and the environment temperature through the condensing device and the corresponding temperature sensor arranged in the cooking device, takes the liner dew point temperature as the representation value of the liner relative humidity based on the mapping relationship determined among the environment temperature, the dew point temperature and the relative humidity, avoids the humidity measurement error caused by the limitation of the humidity sensor, obtains the liner target dew point temperature according to the environment temperature and the liner target humidity, and obtains the cooking control parameter of the steam cooking device according to the liner dew point temperature and the liner target dew point temperature, thereby reducing the corresponding operation amount of temperature and humidity conversion; during the control of the liner humidity of the steam cooking device according to the cooking control parameter, the temperature change information of the liner is obtained, and when the liner humidity satisfies the cooking control parameter compensation condition, the cooking control parameter is compensated according to the humidity change information, thereby avoiding the influence of the lag or overshoot phenomenon caused by the PID control algorithm on the humidity control effect, and improving the accuracy and flexibility of the humidity control.

[0077] Figure 3 Flowchart of the humidity control method of the steam cooking equipment provided by the embodiments of the present application Figure Two As shown in Figure 3 , the humidity control method of the steam cooking equipment provided by the embodiments of the present application comprises:

[0078] S301: obtaining a dew point temperature corresponding to the ambient temperature and the inner container target humidity as the inner container target dew point temperature according to the inner container target humidity and the ambient temperature of the steam cooking equipment, and a mapping relationship between the ambient temperature, the inner container humidity and the dew point temperature.

[0079] Specifically, the humidity control device of the steam cooking equipment obtains the ambient temperature through the temperature sensor arranged in the peripheral area of the condensing device; obtains the inner container humidity indicated by the cooking program information of the steam cooking equipment as the inner container target humidity according to the cooking program information; and obtains the dew point temperature corresponding to the ambient temperature and the inner container target humidity as the inner container target dew point temperature according to the inner container target humidity, the ambient temperature and the pre-stored temperature and humidity mapping relationship, wherein the temperature and humidity mapping relationship is the mapping relationship between the ambient temperature, the inner container humidity and the dew point temperature.

[0080] S302: obtaining the initial temperature of the steam generator of the steam cooking equipment.

[0081] Specifically, the humidity control device of the steam cooking equipment obtains the initial temperature of the steam generator through the temperature sensor arranged in the steam generator.

[0082] S303: determining the pre-humidification control parameter of the steam cooking equipment according to the initial temperature and the inner container target dew point temperature.

[0083] It can be understood that, since the steam cooking equipment may be operated multiple times in a short time, the initial temperature inside the steam generator may change with different room temperatures and the time length from the last stop of operation, and the heat or time required for heating the water in the steam generator to boiling to generate steam is related to the initial temperature of the steam generator. Therefore, the pre-humidification control parameter can be determined according to the initial temperature of the steam generator and the inner container target dew point temperature before pre-humidification, so as to realize sufficient pre-humidification of the inner container on the premise of improving energy utilization efficiency.

[0084] Specifically, the humidity control device of the steam cooking device determines the pre-wetting control parameter of the steam cooking device according to the initial temperature, the inner container target dew point temperature, and a preset corresponding relationship between the initial temperature, the inner container target dew point temperature, and the pre-wetting control parameter. The pre-wetting control parameter may be, for example, a pre-wetting power of the steam generator or a pre-wetting time length of the steam generator. The preset corresponding relationship may be, for example, a function with the inner container target dew point temperature and the initial temperature as independent variables and the pre-wetting time length as a dependent variable. The inner container target dew point temperature and the pre-wetting time length are in a positive correlation, and the initial temperature and the pre-wetting time length are in a negative correlation. The embodiments of the present application do not particularly limit the specific content and form of the pre-wetting control parameter and the preset corresponding relationship.

[0085] S304: The humidity of the inner container of the steam cooking device is controlled according to the pre-wetting control parameter, so as to pre-wet the inner container.

[0086] Specifically, the humidity control device sends a control instruction to the steam generator according to the pre-wetting control parameter, so that the steam generator operates according to the compensated cooking control parameter, so as to pre-shrink the difference between the humidity of the inner container and the target humidity of the inner container.

[0087] S305: After the pre-wetting ends, the cooking control parameter of the steam cooking device is obtained according to the inner container dew point temperature of the steam cooking device and the inner container target dew point temperature.

[0088] The implementation manner of step S305 is similar to that of step S202, and the embodiments will not be described here again.

[0089] S306: During the control of the humidity of the inner container of the steam cooking device according to the cooking control parameter, the inner container dew point temperature at each sampling time within a preset time length is obtained according to a preset sampling frequency.

[0090] Specifically, while the humidity control device of the steam cooking device controls the corresponding device of the steam cooking device according to the cooking control parameter, the humidity control device periodically obtains the inner container dew point temperature at each sampling time within a preset time length according to a preset sampling frequency. The sampling frequency may be, for example, 10 seconds per time, and the preset time length may be, for example, 3 minutes.

[0091] S307: The temperature deviation value at each sampling time is determined according to the inner container dew point temperature at each sampling time and the inner container target dew point temperature.

[0092] Specifically, the humidity control device calculates the absolute value of the difference between the inner container dew point temperature at each sampling time and the inner container target dew point temperature as the temperature deviation value at each sampling time according to the inner container dew point temperature at each sampling time and the inner container target dew point temperature within the preset time length.

[0093] S308: Obtain the temperature change trend and the temperature change rate of the inner container dew point temperature according to the inner container target dew point temperature and the inner container dew point temperature at each sampling time.

[0094] Specifically, the humidity control device draws a curve graph of the change of the inner container dew point temperature with time according to the inner container dew point temperature at each sampling time, with the horizontal axis as time and the vertical axis as the inner container dew point temperature value, and calculates the fitting slope of the curve at each sampling time. The humidity control device can determine the temperature change rate of the inner container dew point temperature within the period according to the mean value of each fitting efficiency, for example. The humidity control device can determine the temperature change trend of the inner container dew point temperature at each sampling time according to the inner container dew point temperature value at each sampling time, the positive and negative of the fitting slope, and the inner container target dew point temperature. If the fitting slope at a certain sampling time is positive, and the inner container dew point temperature at this time is greater than the inner container target dew point temperature, the temperature change trend at this time is that the difference between the inner container dew point temperature and the inner container target dew point temperature increases. If the inner container dew point temperature at this time is less than the inner container target dew point temperature, the temperature change trend at this time is that the difference between the inner container dew point temperature and the inner container target dew point temperature decreases. If the fitting slope at a certain sampling time is negative, and the inner container dew point temperature at this time is greater than the inner container target dew point temperature, the temperature change trend at this time is that the difference between the inner container dew point temperature and the inner container target dew point temperature decreases. If the inner container dew point temperature at this time is less than the inner container target dew point temperature, the temperature change trend at this time is that the difference between the inner container dew point temperature and the inner container target dew point temperature increases. When the temperature change trends of the last N consecutive sampling times within the sampling period are consistent, the temperature change trend of the sampling period can be considered as the temperature change trend of the last N sampling times. N can be 6, for example.

[0095] S309: Take the temperature deviation value at each sampling time, the temperature change trend and the temperature change rate as the temperature change information of the inner container.

[0096] Specifically, the humidity control device takes the temperature deviation value at each sampling time, the temperature change trend and the temperature change rate within the current sampling period as the temperature change information of the inner container within the sampling period.

[0097] S310: Determine whether the inner container humidity meets the cooking control parameter compensation condition according to the temperature change information of the inner container.

[0098] Optionally, the cooking control parameter compensation condition comprises at least one of the following:

[0099] There is at least one continuous sampling time point when the temperature deviation value is greater than the preset deviation value;

[0100] The temperature change trend is that the difference between the inner container dew point temperature and the inner container target dew point temperature increases;

[0101] The temperature change rate is less than the preset change rate.

[0102] It can be understood that when there is at least one continuous sampling time point when the temperature deviation value is greater than the preset deviation value within the preset time period, the inner container humidity may be in a state of lag or overshoot; the temperature change trend within the preset time period is that the difference between the inner container dew point temperature and the inner container target dew point temperature increases, and the inner container humidity may be in an overshoot state of excessive steam amount, or in a state of gradually decreasing inner container humidity caused by too small steam amount; when the temperature change rate is less than the preset change rate, the steam amount in the inner container may be too small to make the inner container humidity reach the target humidity within the expected time; when the above conditions occur, the cooking control parameters of the steam equipment need to be compensated.

[0103] S311: If not, continue to control the inner container humidity of the steam cooking equipment according to the cooking control parameters.

[0104] It can be understood that when the inner container humidity does not meet the cooking control parameter compensation condition, it can be considered that the control effect of the currently used cooking control parameters on the inner container humidity is ideal, and at this time the inner container humidity of the steam cooking equipment can be continued to be controlled according to the cooking control parameters.

[0105] S312: If yes, obtain the compensated cooking control parameters according to the temperature change information.

[0106] It can be understood that when the inner container humidity meets the cooking control parameter compensation condition, it can be considered that the control effect of the currently used cooking control parameters on the inner container humidity is not good, in order to ensure the subsequent control effect, at this time the cooking control parameters can be compensated according to the temperature change information.

[0107] Optionally, the steam cooking equipment comprises a steam generator, the steam generator intermittently operates according to a humidification time period and a non-humidification time period, and the sum of the humidification time period and the non-humidification time period is a preset humidification operation period.

[0108] The humidity control device obtains the compensated cooking control parameters according to the humidity change information, which can be realized by the following steps:

[0109] Step 1: Obtain the inner container dew point temperature at the current time.

[0110] Specifically, the humidity control device of the steam cooking device acquires the inner container dew point temperature at the current time through the temperature sensor arranged on the condensing device.

[0111] Step 2: determining the compensation humidification duration according to the temperature change trend and the temperature change rate, and the inner container dew point temperature at the current time.

[0112] Specifically, the steam cooking device acquires the difference between the inner container dew point temperature at the current time and the inner container dew point temperature according to the inner container dew point temperature at the current time, and determines the compensation humidification duration of the steam cooking device according to the difference, the preset corresponding relationship between the temperature change trend and the temperature change rate and the compensation humidification duration. The preset corresponding relationship may be, for example, a lookup table with different difference intervals, different temperature change rate intervals and different temperature change trend as keys, and the compensation humidification duration as key value, which is determined in advance through experiments. The specific content and form of the preset corresponding relationship are not particularly limited in the embodiments of the present application.

[0113] Step 3: acquiring the adjusted humidification duration according to the compensation humidification duration.

[0114] Specifically, the humidity control device takes the sum of the compensation humidification duration and the humidification duration as the adjusted humidification duration. The compensation humidification duration can be positive or negative. Only in this way, the adjusted humidification duration can be greater than the humidification duration or less than the humidification duration.

[0115] Optionally, the steam cooking device can further include a moisture removal device, which intermittently operates according to a moisture removal duration and a non-moisture removal duration, and the sum of the moisture removal duration and the non-moisture removal duration is a preset moisture removal operation period.

[0116] It can be understood that, in addition to adjusting the control parameters of the steam generator, the control of the inner container humidity can also be achieved by adjusting the control parameters of the moisture removal device. When the difference between the inner container dew point temperature and the inner container target dew point temperature exceeds the preset overshoot threshold; or although the difference between the inner container dew point temperature and the inner container target dew point temperature does not exceed the preset overshoot threshold, the temperature change trend is that the difference between the inner container dew point temperature and the inner container target dew point temperature increases, and the change rate of the inner container dew point temperature is higher than the preset upper limit of the change rate, it can be considered that the PID control appears overshoot phenomenon. Only by adjusting the control parameters of the steam generator to compensate for the overshoot phenomenon, the required duration can be too long. At this time, the control parameters of the moisture removal device for compensating for the overshoot can be acquired according to the humidity change information.

[0117] The humidity control device can obtain the compensated cooking control parameter according to the humidity change information through the following steps:

[0118] Step 1: Obtain the inner container dew point temperature at the current time.

[0119] Specifically, the humidity control device of the steam cooking equipment obtains the inner container dew point temperature at the current time through the temperature sensor arranged on the condensing device.

[0120] Step 2: Determine the compensation dehumidification duration according to the temperature change trend, the temperature change rate, and the inner container dew point temperature at the current time.

[0121] Specifically, the steam cooking equipment obtains the difference between the inner container dew point temperature at the current time and the inner container dew point temperature according to the inner container dew point temperature at the current time, and determines the compensation dehumidification duration of the steam cooking equipment according to the difference, the temperature change trend, the temperature change rate, and a preset corresponding relationship between the compensation dehumidification duration, which can be a lookup table with different difference intervals, different temperature change rate intervals, and different temperature change trends as keys and the compensation dehumidification duration as a key value determined by experiments in advance, and the specific content and form of the preset corresponding relationship are not particularly limited in the embodiments of the present application.

[0122] Step 3: Obtain the adjusted dehumidification duration according to the compensation dehumidification duration.

[0123] Specifically, the humidity control device takes the sum of the compensation dehumidification duration and the dehumidification duration as the adjusted dehumidification duration, and the compensation dehumidification duration can be positive or negative, and the adjusted dehumidification duration can be greater than or less than the dehumidification duration.

[0124] S313: Control the inner container humidity of the steam cooking equipment according to the compensated cooking control parameter.

[0125] Specifically, the humidity control device sends a control instruction to the corresponding humidity adjusting device of the steam cooking equipment according to the compensated cooking control parameter, so that the corresponding humidity adjusting device operates according to the compensated cooking control parameter, so that the inner container humidity of the steam cooking equipment reaches the inner container target humidity; at the same time, the humidity control device continues to obtain the inner container dew point temperature according to the preset sampling frequency; after confirming that the difference between the inner container dew point temperature and the inner container target dew point humidity is less than the preset threshold, that is, after the inner container humidity of the steam cooking equipment reaches the inner container target humidity, the humidity control device can continue to input the difference between the inner container dew point temperature and the target dew point temperature to the PID controller, and control the corresponding device according to the cooking control parameter output by the PID controller.

[0126] The humidity control method of the steam cooking equipment provided by the embodiments of the present application determines the pre-humidification control parameter of the cooking equipment according to the initial temperature and the target dew point temperature of the inner container, controls the humidity of the inner container of the steam cooking equipment according to the pre-humidification control parameter, and performs pre-humidification processing on the inner container, so that the time required for the humidity of the inner container to be raised to the target humidity in the subsequent cooking stage is shorter. The temperature deviation value, the temperature change trend and the temperature change rate of each sampling time within a preset time period are taken as the temperature change information of the inner container, and it is determined whether the corresponding control parameter needs to be compensated according to the temperature change information, so that the accuracy of the humidity control effect is accurately monitored and timely adjusted and controlled, and the accuracy of the humidity control of the inner container is improved. The humidification time of the steam generator and the dehumidification time of the dehumidification device are compensated correspondingly according to the temperature change information, so that the humidity of the inner container can be effectively adjusted and controlled in various situations where the control effect is not good, and the flexibility of the humidity control of the inner container is improved.

[0127] Figure 4 The structure diagram of the humidity control device of the steam cooking equipment provided by the embodiments of the present application is shown as Figure 4 The present application provides a humidity control device of a steam cooking equipment, the humidity control device 400 of the steam cooking equipment comprises:

[0128] The acquisition module 401 is configured to acquire the target dew point temperature of the inner container according to the ambient temperature of the steam cooking equipment and the target humidity of the inner container, and acquire the cooking control parameter of the steam cooking equipment according to the dew point temperature of the inner container of the steam cooking equipment and the target dew point temperature of the inner container; and acquire the temperature change information of the inner container during the control of the humidity of the inner container of the steam cooking equipment according to the cooking control parameter.

[0129] The operation module 402 is configured to determine whether the humidity of the inner container meets the cooking control parameter compensation condition according to the temperature change information of the inner container, and acquire the compensated cooking control parameter according to the temperature change information when the humidity of the inner container meets the cooking control parameter compensation condition.

[0130] The control module 403 is configured to control the humidity of the inner container of the steam cooking equipment according to the compensated cooking control parameter.

[0131] Optionally, the acquisition module 401 is specifically configured to acquire, according to a preset sampling frequency, the liner dew point temperature at each sampling time within a preset time length; determine a temperature deviation value at each sampling time according to the liner dew point temperature at each sampling time and the liner target dew point temperature; acquire a temperature change trend and a temperature change rate of the liner dew point temperature according to the liner target dew point temperature and the liner dew point temperature at each sampling time; and take the temperature deviation value at each sampling time, the temperature change trend and the temperature change rate as the temperature change information of the liner.

[0132] Optionally, the cooking control parameter compensation condition comprises at least one of the following: there is at least one continuous sampling time with a temperature deviation value greater than a preset deviation value; the temperature change trend is a trend that the difference between the liner dew point temperature and the liner target dew point temperature increases; and the temperature change rate is less than a preset change rate.

[0133] Optionally, the steam cooking device comprises a steam generator, the steam generator is intermittently operated according to a humidification time length and a non-humidification time length, and the sum of the humidification time length and the non-humidification time length is a preset humidification operation period; the cooking control parameter comprises the humidification time length; and the operation module 402 is specifically configured to acquire the liner dew point temperature at a current time; determine a compensation humidification time length according to the temperature change trend and the temperature change rate and the liner dew point temperature at the current time; and acquire an adjusted humidification time length according to the compensation humidification time length.

[0134] Optionally, the steam cooking device comprises a steam generator, the steam generator is intermittently operated according to a humidification time length and a non-humidification time length, and the sum of the humidification time length and the non-humidification time length is a preset humidification operation period; the cooking control parameter comprises the humidification time length; and the operation module 402 is specifically configured to acquire the liner dew point temperature at a current time; determine a compensation humidification time length according to the temperature change trend and the temperature change rate and the liner dew point temperature at the current time; and acquire an adjusted humidification time length according to the compensation humidification time length.

[0135] Optionally, the acquisition module 401 is specifically configured to acquire, according to the liner target humidity and the environment temperature and a mapping relationship among the environment temperature, the liner humidity and the dew point temperature, a dew point temperature corresponding to the environment temperature and the liner target humidity as the liner target dew point temperature.

[0136] Optionally, the acquisition module 401 is further configured to acquire an initial temperature of a steam generator of the steam cooking device and the liner target dew point temperature.

[0137] The operation module 402 is further configured to determine a pre-humidification control parameter of the steam cooking device according to the initial temperature and the liner target dew point temperature.

[0138] The control module 403 is further configured to control the liner humidity of the steam cooking device according to the pre-humidification control parameter, so as to perform pre-humidification processing on the liner.

[0139] Figure 5 A structural schematic diagram of an electronic device provided by an embodiment of the present application is shown in FIG. 5. Figure 5 As shown in FIG. 5, the electronic device 500 includes at least one processor 501 and a memory 502. In addition, the electronic device 500 can also have a communication interface 504 for receiving and sending instructions.

[0140] The processor 501, the memory 502 and the communication interface 504 are connected through a bus 503.

[0141] The computer program is stored in the memory 502 and is configured to be executed by the processor 501 to implement the technical solutions of the embodiments of the present application. Figures 2-3 The humidity control method of the steam cooking device provided by any of the embodiments of the present application;

[0142] Figure 5 The electronic device of the embodiment shown in FIG. 5 can be used to execute the technical solutions of the method embodiments, and the implementation principles and technical effects are similar, which will not be described here.

[0143] In addition, the present embodiment also provides a computer readable storage medium having a computer program stored thereon, and the computer program is executed by a processor to implement the humidity control method of the steam cooking device of the above-mentioned embodiments.

[0144] In the several embodiments of the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. The division of the units is only a logical function division. There can be another division manner in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0145] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, some or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0146] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware, or in the form of hardware plus software functional unit.

[0147] The integrated unit realized in the form of software functional unit can be stored in a computer readable storage medium. The software functional unit stored in a storage medium includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute part of steps of the method of each embodiment of the present application. The storage medium mentioned above includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

[0148] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional modules is taken as an example, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the device described above can refer to the corresponding process in the foregoing method embodiments, and will not be described here.

[0149] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments, and the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solution recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of each embodiment of the present application.

Claims

1. A humidity control method for a steam cooking device, characterized in that, The method includes: The target dew point temperature of the inner pot is obtained based on the ambient temperature and target humidity of the inner pot of the steam cooking equipment. The cooking control parameters of the steam cooking equipment are obtained based on the dew point temperature of the inner pot and the target dew point temperature of the inner pot; the dew point temperature of the inner pot of the steam cooking equipment is obtained by a temperature sensor installed in the dew point temperature detection device of the steam cooking equipment. During the period when the humidity of the inner pot of the steam cooking equipment is controlled according to the cooking control parameters, the dew point temperature of the inner pot is obtained at each sampling moment within a preset time period according to a preset sampling frequency. The temperature deviation value for each sampling time is determined based on the inner liner dew point temperature and the inner liner target dew point temperature at each sampling time. Based on the target dew point temperature of the inner liner and the dew point temperature of the inner liner at each sampling time, the temperature change trend and temperature change rate of the inner liner dew point temperature are obtained. The temperature deviation value at each sampling time, the temperature change trend, and the temperature change rate are used as the temperature change information of the inner liner. Based on the temperature change information of the inner pot, determine whether the humidity of the inner pot meets the compensation conditions for the cooking control parameters; If so, then the compensated cooking control parameters are obtained based on the temperature change information; The humidity inside the steam cooking equipment is controlled according to the compensated cooking control parameters.

2. The method according to claim 1, characterized in that, The cooking control parameter compensation conditions include at least one of the following: There is at least one consecutive sampling moment where the temperature deviation value is greater than the preset deviation value; The temperature change trend is a trend of increasing difference between the inner liner dew point temperature and the inner liner target dew point temperature; The rate of temperature change is less than the preset rate of change.

3. The method according to claim 1, characterized in that, The steam cooking equipment includes: a steam generator, which operates intermittently according to a humidification period and a non-humidification period, the sum of the humidification period and the non-humidification period being a preset humidification operating cycle; the cooking control parameters include: humidification period; the step of obtaining compensated cooking control parameters based on the temperature change information includes: Obtain the current dew point temperature of the inner liner; The compensation humidification duration is determined based on the temperature change trend and the temperature change rate, as well as the current dew point temperature of the inner liner. Based on the compensated humidification duration, the adjusted humidification duration is obtained.

4. The method according to claim 1, characterized in that, The steam cooking equipment includes: a dehumidification device, which operates intermittently according to a dehumidification duration and a non-drainage duration, the sum of the dehumidification duration and the non-dehumidification duration being a preset humidification operation cycle; the cooking control parameters include: dehumidification duration; the step of obtaining compensated cooking control parameters based on the temperature change information includes: Obtain the current dew point temperature of the inner liner; The compensation dehumidification duration is determined based on the temperature change trend and the temperature change rate, as well as the current dew point temperature of the inner liner. Based on the compensated dehumidification time, the adjusted dehumidification time is obtained.

5. The method according to claim 1, characterized in that, The step of obtaining the target dew point temperature of the inner pot based on the ambient temperature and target humidity of the inner pot of the steam cooking equipment includes: Based on the target humidity of the inner liner and the ambient temperature, as well as the mapping relationship between the ambient temperature, the humidity of the inner liner and the dew point temperature, the dew point temperature corresponding to the ambient temperature and the target humidity of the inner liner is obtained as the target dew point temperature of the inner liner.

6. The method according to claim 1, characterized in that, Before obtaining the cooking control parameters of the steam cooking equipment based on the inner tank dew point temperature and the target dew point temperature of the inner tank, the method further includes: Obtain the initial temperature of the steam generator of the steam cooking equipment and the target dew point temperature of the inner pot; The pre-humidification control parameters of the steam cooking equipment are determined based on the initial temperature and the target dew point temperature of the inner liner. The humidity of the inner liner of the steam cooking equipment is controlled according to the pre-humidification control parameters to pre-humidify the inner liner.

7. A humidity control device for a steam cooking equipment, characterized in that, include: The acquisition module is used to acquire the target dew point temperature of the inner pot based on the ambient temperature and the target humidity of the inner pot of the steam cooking equipment; acquire the cooking control parameters of the steam cooking equipment based on the dew point temperature of the inner pot and the target dew point temperature of the inner pot; and acquire the temperature change information of the inner pot during the period when the humidity of the inner pot of the steam cooking equipment is controlled according to the cooking control parameters. The calculation module is used to determine whether the humidity of the inner pot meets the cooking control parameter compensation conditions based on the temperature change information of the inner pot; when the humidity of the inner pot meets the cooking control parameter compensation conditions, the module obtains the compensated cooking control parameters based on the temperature change information. The control module is used to control the humidity of the inner pot of the steam cooking equipment according to the compensated cooking control parameters; The acquisition module is specifically used to acquire the inner liner dew point temperature at each sampling moment within a preset time period according to a preset sampling frequency. The temperature deviation value for each sampling time is determined based on the inner liner dew point temperature and the inner liner target dew point temperature at each sampling time. Based on the target dew point temperature of the inner liner and the dew point temperature of the inner liner at each sampling time, the temperature change trend and temperature change rate of the inner liner dew point temperature are obtained. The temperature deviation value at each sampling time, the temperature change trend, and the temperature change rate are used as the temperature change information of the inner liner.

8. An electronic device, characterized in that, include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the method as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-6.

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