Electric steamer and heating control method thereof

Abstract

The invention discloses an electric steamer and a heating control method thereof, and relates to the technical field of intelligent household appliances. The electric steamer comprises a steamer body and an altitude detector, a steam generating device and a steam heating device are arranged in the steamer body, the altitude detector is configured to detect current altitude parameters, and the steam heating device is configured to heat steam generated by the steam generating device according to a temperature limiting value; the heating control method of the electric steamer comprises the steps that after heating work is started, current altitude parameters are obtained through an altitude detector; determining a target temperature limiting value corresponding to the current altitude parameter based on the current altitude parameter; and adjusting the current temperature limiting value of the steam heating device to the target temperature limiting value. Therefore, the method has the advantages of being suitable for different altitude conditions and improving the cooking efficiency, the cooking quality and the cooking intelligence.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, and more specifically, to an electric steamer and its heating control method. Background Art

[0002] Steaming is a healthy cooking method that can preserve the original flavor of food and prevent excessive loss of nutrients in the ingredients. Electric steamers are deeply loved by consumers due to their high steam generation efficiency and good safety. However, as the altitude increases, the atmospheric pressure gradually decreases, and the boiling point of water also decreases accordingly. When existing electric steamers are applied in high-altitude areas, the steam temperature generated by the electric steamer is too low to steam the ingredients thoroughly. To address this problem, although some existing electric steamer products are equipped with devices for secondary heating of steam, such as the existing patent CN218606118U, or some existing electric steamer products are equipped with devices for secondary heating of boiling water to raise the water vapor generated from boiling water to a higher temperature, they can only raise the steam temperature to a fixed temperature.

[0003] In the case of changes in the actual altitude value, existing electric steamers cannot meet the different temperature increase requirements for secondary heating of steam at different altitudes, that is, existing electric steamers cannot adaptively adjust the heating parameters required for secondary temperature increase of water vapor. This will cause the steam temperature of the electric steamer to increase too fast and too high at lower altitudes, requiring the electric steamer to use materials with better heat resistance (resulting in increased costs), otherwise it is easy to affect the service life of the electric steamer and easily scald users. At higher altitudes, the steam temperature of the electric steamer will increase slowly and be insufficient, thereby affecting the cooking efficiency of the electric steamer, and even unable to ensure that the steamed ingredients can be fully cooked after the altitude increases, which will seriously affect the user experience of the electric steamer product.

[0004] Therefore, there is an urgent need for a new heating control method for electric steamers to ensure that the ingredients are cooked with a suitable steam temperature under different altitude conditions and improve the cooking efficiency. Summary of the Invention

[0005] The purpose of the present application is to provide an electric steamer and its heating control method, which adaptively adjusts the target temperature increase for secondary temperature increase of steam (i.e., the current temperature limit value of the steam heating device) based on the current altitude parameter detected by the altitude detector, so as to ensure that the ingredients can be fully cooked and not overheated at different altitudes, and effectively improve the cooking efficiency, cooking quality and cooking intelligence of the electric steamer.

[0006] The embodiments of the present application are implemented as follows:

[0007] In the first aspect of the embodiment of the present application, a heating control method for an electric steamer is provided. The electric steamer includes a body and an altitude detector. A steam generating device and a steam heating device are provided inside the body. The altitude detector is configured to detect the current altitude parameter. The steam heating device is configured to heat and raise the temperature of the water vapor generated by the steam generating device according to a temperature limit value. The heating control method of the electric steamer includes: after starting the heating operation, obtaining the current altitude parameter through the altitude detector; determining a target temperature limit value corresponding to the current altitude parameter based on the current altitude parameter; and adjusting the current temperature limit value of the steam heating device to the target temperature limit value.

[0008] In one embodiment, determining a target temperature limit value corresponding to the current altitude parameter based on the current altitude parameter includes: calculating a first temperature limit value based on the boiling point temperature value corresponding to the current altitude parameter; comparing the first temperature limit value with the maximum temperature limit value, and determining the smaller value as the target temperature limit value.

[0009] In one embodiment, calculating a first temperature limit value based on the boiling point temperature value corresponding to the current altitude parameter includes: according to the formula T N =(100 - T0)×α + 200, calculating a first temperature value; where T N is the first temperature value, with the unit of °C; T0 is the boiling point temperature value, with the unit of °C; α is the altitude coefficient, and the value range is 2.5 to 5.

[0010] In one embodiment, after comparing the first temperature limit value with the maximum temperature limit value and determining the smaller value as the target temperature limit value, the method further includes: if the first temperature limit value is greater than the maximum temperature limit value, extending the total heating duration of the electric steamer.

[0011] In one embodiment, determining a target temperature limit value corresponding to the current altitude parameter based on the current altitude parameter includes: determining the altitude area type corresponding to the current altitude parameter based on the preset altitude parameter interval where the current altitude parameter is located; when the altitude area type is a low altitude area, determining the target temperature limit value as the initial temperature limit value; when the altitude area type is a high altitude area, determining the target temperature limit value corresponding to the current altitude parameter based on the known temperature limit value adjustment rule.

[0012] In one embodiment, determining the altitude area type corresponding to the current altitude parameter based on the preset altitude parameter interval where the current altitude parameter is located includes: if the current altitude parameter reaches the preset parameter threshold, determining the altitude area type as a low altitude area; if the current altitude parameter is lower than the preset parameter threshold, determining the altitude area type as a high altitude area.

[0013] In one embodiment, the high altitude areas correspond to multiple preset altitude parameter sub - intervals; when the altitude area type is a high altitude area, determining the target temperature limit value corresponding to the current altitude parameter based on the known temperature limit value adjustment rule includes: determining the current altitude range or temperature limit value range corresponding to the current altitude parameter according to the altitude parameter sub - interval where the current altitude parameter is located; determining the target temperature limit value corresponding to the current altitude parameter based on the endpoint threshold of the current altitude range or the endpoint threshold of the temperature limit value range.

[0014] In one embodiment, the altitude detector is a temperature sensor or a pressure sensor. The current altitude parameter detected by the electric steamer through the temperature sensor is the current boiling point value, and the current altitude parameter detected by the electric steamer through the pressure sensor is the current air pressure value; after obtaining the current altitude parameter through the altitude detector, the method further includes: determining the current altitude value and / or the current altitude range corresponding to the current working location of the electric steamer based on the current boiling point value or the current air pressure value.

[0015] In one embodiment, the heating control method of the electric steamer further includes: adjusting the heating power of the steam generating device so that the steam mass flow rate in the electric steamer is maintained within a preset flow rate range.

[0016] In the second aspect of the embodiments of the present application, an electric steamer is provided. The electric steamer includes a body, a steam generating device, a steam heating device, an altitude detector, and a main control chip. Among them, a water tank is provided inside the body; the steam generating device is arranged at the bottom end of the water tank; the steam heating device is arranged in the water tank. The steam heating device includes a first temperature controller and a first heating element, and the first temperature controller controls the first heating element to heat or stop heating with the target temperature limit value; the altitude detector is arranged inside the body or on the outer side wall of the body; the altitude detector is configured to detect the current altitude parameter; the main control chip is arranged inside the body and is electrically connected to the altitude detector, the steam generating device, and the steam heating device. The main control chip is configured to: obtain the current altitude parameter; determine the target temperature limit value corresponding to the current altitude parameter based on the current altitude parameter; adjust the current temperature limit value of the steam heating device to the target temperature limit value.

[0017] The beneficial effects of the present application compared with the prior art are:

[0018] This application can solve the technical problem that existing electric steamers cannot adaptively adjust heating parameters under different altitude conditions, resulting in overheating of the electric steamer at low altitudes and inability to cook food materials at high altitudes. This application obtains the current altitude parameter related to the current altitude situation through an altitude detector, and then adjusts the current temperature limit value of the steam heating device to the target temperature limit value corresponding to the current altitude parameter, so that the steam generated by the electric steamer will not overheat after secondary heating and can fully cook the food materials. Therefore, the electric steamer provided by this application can intelligently adjust the heating parameters of the steam heating device according to the altitude conditions where the current electric steamer is located, and has the advantages of adapting to altitude changes, improving cooking intelligence and cooking efficiency, and ensuring cooking quality.

[0019] In addition, this application calculates the temperature limit value based on the boiling point temperature value corresponding to the current altitude parameter, and can accurately obtain the temperature of the secondary heating steam (the first temperature limit value) matching the current altitude value, while preventing the electric steamer from overheating and ensuring that the food materials are fully cooked; this application compares the first temperature limit value with the maximum temperature limit value and takes the smaller value as the target temperature limit value, which can allow the electric steamer to preferentially select the heating temperature suitable for the current altitude situation within the allowable temperature range, and maximize the heating efficiency while ensuring the working stability and reliability of the electric steamer; when the first temperature limit value is greater than the maximum temperature limit value, this application extends the total heating duration of the electric steamer, which can improve the degree of food material cooking and the cooking quality of the electric steamer; this application determines the target temperature limit value of the steam heating device in different ways based on different altitude region types, which can make the heating operation of the electric steamer more adaptable to the current altitude conditions; this application also adjusts the heating power of the steam generating device to keep the steam mass flow rate in the electric steamer within the preset flow rate range, so that the steam after secondary heating is fully utilized, improving the heating efficiency of the electric steamer and reducing energy waste. In summary, this application has the advantages of accurately adapting to altitude conditions, reducing energy waste, improving heating efficiency, ensuring cooking quality, and ensuring the working stability and reliability of the electric steamer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of this application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of this application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of an electric steamer provided by an embodiment of this application;

[0022] Figure 2 It is a partial structural schematic diagram of an electric steamer provided by an embodiment of this application;

[0023] Figure 3 Schematic structural diagram of a steam temperature-raising device provided by an embodiment of the present application;

[0024] Figure 4 Schematic flow diagram of a heating control method for an electric steamer provided by an embodiment of the present application;

[0025] Figure 5 Schematic flow diagram of a heating control method for an electric steamer provided by an embodiment of the present application.

[0026] Reference numerals: 1 - electric steamer; 11 - body; 12 - steamer assembly; 13 - steamer lid; 14 - air duct; 15 - water receiving tray; 20 - steam generating device; 21 - water tank; 30 - steam temperature-raising device; 31 - first temperature controller; 32 - first heating element; 33 - heat conductor; 34 - temperature controller accommodation groove; 40 - altitude detector; 51 - main control chip; 52 - memory. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application.

[0028] Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0029] Next, the technical solutions of the present application will be clearly and completely described with reference to the accompanying drawings.

[0030] Please refer to Figure 1 , Figure 1 Schematic structural diagram of an electric steamer 1 provided by an embodiment of the present application. As Figure 1 shown, the present application provides an electric steamer 1, including a body 11, a steamer assembly 12, a steamer lid 13, a steam generating device 20, a steam temperature-raising device 30, an altitude detector 40, a main control chip 51, and a memory 52.

[0031] Among them, a water tank 21 is provided inside the body 11, and a water receiving tray 15 is provided at the top of the water tank 21; the steam generating device 20 is provided at the bottom end of the water tank 21 (or the bottom surface of the water tank 21 is part of the steam generating device 20); the steam temperature-raising device 30 is provided inside the water tank 21 (as Figures 1 to 2The shown steam heating device 30 is disposed in the center of the water tank 21), and the steam heating device 30 is connected to the bottom surface of the water tank 21 (or the steam heating device 30 is connected to the steam generating device 20); the altitude detector 40 is disposed inside the body 11 or on the outer side wall of the body 11, and the altitude detector 40 is configured to detect the current altitude parameter.

[0032] The steamer assembly 12 is disposed at the top of the body 11, the steamer lid 13 is disposed at the top of the steamer assembly 12, and the steamer assembly 12, the steamer lid 13 and the body 11 form a cooking cavity. The cooking cavity cooks the food materials in the steamer assembly 12 by the heated steam; the air duct 14 is disposed at the top of the water tank 21 and is located at the connection between the body 11 and the steamer assembly 12. The water vapor generated by the heat generation of the steam generating device 20 and secondarily heated by the steam heating device 30 enters the steamer assembly 12 through the air duct 14 to heat the food materials in the steamer assembly 12.

[0033] The main control chip 51 and the memory 52 are disposed inside the body 11, and the main control chip 51 is electrically connected to the altitude detector 40, the steam generating device 20, the steam heating device 30 and the memory 52. The memory 52 stores instructions and parameters executable by the main control chip 51, so that at least one main control chip 51 executes the heating control method of the electric steamer 1 in the following embodiments.

[0034] In one embodiment, the altitude detector 40 can be selected as a temperature sensor or a pressure sensor. When the altitude detector 40 is a temperature sensor, the altitude detector 40 is configured to detect the boiling point temperature value related to the current altitude value. As Figure 1 shown, the altitude detector 40 is connected to the bottom end of the water tank 21, and the detection end of the altitude detector 40 extends into the water tank 21 to contact the liquid, so as to detect the liquid temperature (current boiling point value) in the water tank 21. The pressure sensor is configured to detect the air pressure value related to the current altitude value, and the pressure sensor is disposed on the outer wall of the body 11 or in the chamber of the body 11 isolated from the cooking cavity (to avoid the influence of the air pressure change in the cooking cavity on the detection).

[0035] Please refer to Figure 2 , Figure 2 which is a partial structural schematic diagram of the electric steamer 1 provided by an embodiment of the present application. As Figure 2 shown, the altitude detector 40 is a temperature sensor, the altitude detector 40 is connected to the bottom end of the water tank 21 but does not directly contact the liquid in the water tank 21. The altitude detector 40 indirectly measures the current boiling point value of the liquid in the water tank 21 by detecting the temperature of the bottom wall of the water tank 21, and the installation and disassembly of the altitude detector 40 are relatively convenient.

[0036] Please combine with Figures 1 to 2As shown, during an application process, the altitude detector 40 feeds back the detected current altitude parameter to the main control chip 51. The main control chip 51 calculates or retrieves a target temperature limit value suitable for the current altitude condition based on the current altitude parameter or the current altitude value corresponding to the current altitude parameter. The main control chip 51 controls the steam generating device 20 to heat, so as to heat the liquid in the water tank 21 to the boiling point and generate steam; the main control chip 51 controls the steam temperature increasing device 30 to heat or stop heating according to the target temperature limit value, so as to reheat the steam generated in the water tank 21 to a fixed temperature, eliminate the defect that the altitude is too high and the steam is not enough to steam the food materials, and prevent the electric steamer 1 from overheating and damaging the components under low altitude conditions, thereby improving the stability and reliability of the operation of the electric steamer.

[0037] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of the steam temperature increasing device 30 provided by an embodiment of the present application. As Figure 3 shown, the steam temperature increasing device 30 includes a first temperature controller 31 and a first heating element 32. The first temperature controller 31 can control the first heating element 32 to heat or stop heating according to the target temperature limit value. The steam temperature increasing device 30 further includes a heat conductor 33, and the heat conductor 33 has a temperature controller accommodation groove 34 and a central through hole. The first temperature controller 31 is electrically connected to the first heating element 32. The first temperature controller 31 is arranged in the temperature controller accommodation groove 34, and two first heating elements 32 are arranged in the central through hole. When the current temperature value detected by the first temperature controller 31 reaches the target temperature limit value, the first temperature controller 31 controls the first heating element 32 to stop heating. When the current temperature value detected by the first temperature controller 31 is lower than the target temperature limit value, the first temperature controller 31 controls the first heating element 32 to continue heating. The heat conductor 33 conducts the heat generated by the first heating element 32 to the outside of the heat conductor 33 to reheat the steam. Please combine with Figures 1 to 3 shown, the steam temperature increasing device 30 further includes an outer cover, and the outer cover separates the heat conductor 33, the first temperature controller 31, the first heating element 32 from the liquid in the water tank 21.

[0038] During an application process, the liquid in the water tank 21 boils to generate steam after being heated by the steam generating device 20. After the steam enters the outer cover from the inlet of the outer cover, it is reheated and heated to a specified temperature through the heat conduction of the heat conductor 33. The heated steam enters the steamer assembly 12 through the outlet at the top of the outer cover and the air duct 14 to heat and steam the food materials in the steamer assembly 12.

[0039] Please refer to Figure 4 , Figure 4 which is a schematic flow chart of the heating control method of the electric steamer provided by an embodiment of the present application. The heating control method of the electric steamer is executed by the electric steamer or the main control chip. As Figure 4 shown, the heating control method of the electric steamer includes:

[0040] S110: After starting the heating operation, obtain the current altitude parameter through the altitude detector;

[0041] In this step, after the electric steamer starts the heating operation, the liquid (clear water) in the water tank is heated by the steam generating device to make it boil and generate water vapor. If the altitude detector obtains the current altitude parameter by detecting the atmospheric pressure at the current altitude where the electric steamer is located, the main control chip can obtain the current altitude parameter at any time after the electric steamer is started, that is, obtain the current air pressure value; if the altitude detector obtains the current altitude parameter by detecting the current boiling point of the liquid in the water tank, the main control chip can, after the temperature value detected by the altitude detector rises and stabilizes at a fixed value or within a fixed value range, and the stable maintenance duration exceeds a certain duration, use the stabilized temperature value as the current altitude parameter, that is, the current boiling point value. Thus, the current altitude parameter refers to a detectable parameter value related to the current altitude, such as the current boiling point value of the liquid, the current air pressure value, etc.

[0042] In other embodiments, the current altitude parameter may also refer to a specific altitude value (i.e., the specific altitude) or a specific altitude range indirectly determined based on the positioning system and sensors. The current altitude parameter or the current altitude can also be manually set by the user without the need for detection by the altitude detector.

[0043] S120: Based on the current altitude parameter, determine the target temperature limit value corresponding to the current altitude parameter.

[0044] The temperature limit value refers to the reference temperature when the steam heating device generates heat, that is, the temperature threshold at which the steam heating device controls the first heating element to generate heat or stop generating heat through the first temperature controller. The steam heating device stops generating heat when it reaches the temperature limit value and continues to generate heat when it is lower than the temperature limit value. In this step, the electric steamer determines the target temperature limit value of the steam heating device based on the current altitude parameter, so as to heat the newly generated steam to a specified temperature matching the current altitude based on the target temperature limit value, so that the ingredients in the steamer assembly can be fully heated.

[0045] S130: Adjust the current temperature limit value of the steam heating device to the target temperature limit value.

[0046] The current temperature limit value refers to the temperature threshold at which the first temperature controller in the steam heating device controls the first heating element to heat or stop heating at the current moment. In this step, after the main control chip determines the target temperature limit value that matches the current altitude parameter (or current altitude), the main control chip controls the first temperature controller to adjust its own temperature limit value from the current temperature limit value to the target temperature limit value, so that the water vapor generated by the steam generating device can be heated again at the steam heating device and heated to an appropriate temperature. The steam after secondary heating can not only ripen the ingredients in the steamer assembly after sufficient heating, but also avoid damage to components or energy waste caused by excessive heating of the electric steamer.

[0047] Based on the above solution, the present application obtains the current altitude parameter (or current altitude) related to the current altitude situation through the altitude detector; then adjusts the current temperature limit value of the steam heating device to the target temperature limit value adapted to and matching the current altitude parameter, so that the steam generated by the electric steamer will not be heated too high and can fully ripen the ingredients after secondary heating. Therefore, the electric steamer provided by the present application can intelligently adjust its own heating parameters according to the altitude where the electric steamer is currently located, has the advantages of adapting to altitude changes, improving cooking intelligence and cooking efficiency, ensuring cooking quality, saving energy consumption, and can be widely applied to high and low altitude areas.

[0048] Please refer to Figure 5 , Figure 5 which is a schematic flowchart of the heating control method of the electric steamer provided by an embodiment of the present application. The heating control method of the electric steamer is executed by the electric steamer or the main control chip. As Figure 5 shown, the heating control method of the electric steamer includes:

[0049] S210: After starting the heating operation, obtain the current altitude parameter through the altitude detector;

[0050] The current altitude parameter may refer to the detectable parameter value related to the current altitude directly obtained through the altitude detector, such as the boiling point temperature value, the current air pressure value, etc.; the current altitude parameter may also refer to the current altitude or current altitude range indirectly obtained through the altitude detector. In other embodiments, the user can also manually set the current altitude parameter or current altitude on the operation interface of the electric steamer.

[0051] In one embodiment, the altitude detector 40 is a temperature sensor or a barometric pressure sensor. The current altitude parameter detected by the electric steamer 1 through the temperature sensor is the current boiling point value, and the current altitude parameter detected by the electric steamer 1 through the barometric pressure sensor is the current barometric pressure value. In this step, after the electric steamer starts the heating operation, the liquid (clean water) in the water tank is heated by the steam generating device to make it boil and generate water vapor. If the altitude detector obtains the current altitude parameter by detecting the atmospheric pressure at the current altitude of the electric steamer, the main control chip can obtain the current altitude parameter at any time after the electric steamer is turned on, that is, obtain the current barometric pressure value; if the altitude detector obtains the current altitude parameter by detecting the boiling point of the water in the water tank, the main control chip can use the stable temperature value as the current altitude parameter, that is, the current boiling point value, after the temperature value detected by the altitude detector rises and stabilizes within a fixed value or a fixed value range, and the stable maintenance duration exceeds a certain duration.

[0052] In one embodiment, if the current altitude parameter is a detection value related to the current altitude, after obtaining the current altitude parameter through the altitude detector, the heating control method of the electric steamer may further include step S215: determining the current altitude value and / or the current altitude range corresponding to the current working location of the electric steamer based on the current boiling point value or the current barometric pressure value.

[0053] In this step, the electric steamer can also further calculate or look up the current altitude value and / or the current altitude range corresponding to the current altitude parameter, so as to calculate or query the target temperature limit value based on the current altitude value and / or the current altitude range in the subsequent steps.

[0054] S220: determining the altitude area type corresponding to the current altitude parameter based on the preset altitude parameter interval where the current altitude parameter is located.

[0055] The preset altitude parameter interval refers to the altitude parameter interval corresponding to the high altitude area and the altitude parameter interval corresponding to the low altitude area. In one embodiment, the altitude area type is divided into high altitude areas and low altitude areas based on the altitude. In other embodiments of the present application, the altitude area type can also be divided into high, medium, and low altitude areas based on the altitude, which is not limited herein. Taking the altitude area type only including high altitude areas and low altitude areas as an example, if the current altitude parameter reaches the preset parameter threshold, the altitude area type is determined to be a low altitude area; if the current altitude parameter is lower than the preset parameter threshold, the altitude area type is determined to be a high altitude area.

[0056] For example, taking an electric steamer that detects the boiling point of a liquid through a temperature sensor as an example, the main control chip compares the current boiling point value with a preset temperature threshold. If the current boiling point value reaches the preset temperature threshold, it is determined that the altitude area type of the current location of the electric steamer is a low-altitude area (or called a plain area); if the current boiling point value is lower than the preset temperature threshold, it is determined that the altitude area type of the current location of the electric steamer is a high-altitude area. Then, based on the altitude area type, the main control chip matches the corresponding steam secondary heating parameters, that is, the target temperature limit value of the steam heating device.

[0057] S230: When the altitude area type is a low-altitude area, determine that the target temperature limit value is the initial temperature limit value.

[0058] The initial temperature limit value refers to the constant temperature limit value set for the steam heating device when the current location of the electric steamer is a low-altitude area. In low-altitude plain areas, the heating efficiency of electric steamers is generally high, which is beneficial to the rapid cooking of ingredients. When the altitude area type is a low-altitude area, the main control chip determines that the target temperature limit value is the preset initial temperature limit value. This initial temperature limit value is widely applicable to the heating work of electric steamers in various plain low-altitude areas, and can heat the saturated steam in the electric steamer to a high temperature state, improve the steam superheat degree, the steaming efficiency of the electric steamer, and ensure the full cooking of ingredients. Optionally, the value range of the initial temperature limit value is 160°C to 220°C, preferably 200°C. The value of the initial temperature limit value should be lower than the maximum allowable temperature (maximum heat-resistant temperature) of the common materials of the electric steamer parts, and should ensure that the top layer temperature of the steamer component of the electric steamer can cook the ingredients (generally about 120°C).

[0059] In other embodiments of the present application, the target temperature limit value corresponding to the low-altitude area can also be determined based on the look-up table matching method and / or specific algorithms (specific algorithm models), and is not limited to the preset fixed temperature value. For specific determination details, please refer to the specific embodiments in the following step S240, and will not be elaborated here.

[0060] S240: When the altitude area type is a high-altitude area, determine the target temperature limit value corresponding to the current altitude parameter based on the known temperature limit value adjustment rule.

[0061] The temperature limit value adjustment rule refers to the specific method of determining the target temperature limit value adapted to the current altitude conditions based on the altitude area type and the current altitude parameter (or current altitude). In this step, when the altitude area type is a high-altitude area, the main control chip can query the target temperature limit value corresponding to the current altitude parameter (or current altitude) based on the pre-stored altitude-temperature limit value matching relationship table; the main control chip can also determine the target temperature limit value corresponding to the current altitude parameter (or current altitude) based on the pre-stored algorithm or calculation model. The specific details are as follows.

[0062] Embodiment 1: Matching query method.

[0063] After obtaining the current altitude parameter, the main control chip can determine the current altitude range or the temperature limit value range corresponding to the current altitude parameter according to the altitude parameter sub - interval where the current altitude parameter is located. Then, based on the endpoint threshold of the current altitude range or the endpoint threshold of the temperature limit value range, the target temperature limit value corresponding to the current altitude parameter is determined. Specifically, if the current altitude parameter corresponds to a temperature limit value range, the main control chip can determine the target temperature limit value only according to the highest threshold or the lowest threshold of the temperature limit value range; it can also determine the target temperature limit value corresponding to the parameter endpoint threshold based on the parameter endpoint threshold closer to the current altitude parameter (or the current altitude) (proximity principle); the main control chip can also calculate the target temperature limit value corresponding to the current altitude parameter through interpolation, the altitude parameter sub - interval where the current altitude parameter is located, and the temperature limit value range corresponding to the altitude parameter sub - interval.

[0064] Embodiment 2: Substitute into a specific algorithm for calculation.

[0065] The main control chip can calculate the first temperature limit value based on the boiling point temperature value corresponding to the current altitude parameter. Then, the main control chip compares the first temperature limit value with the maximum temperature limit value and determines the smaller value as the target temperature limit value to prevent the water vapor from being reheated to too high a temperature and causing damage to the components of the electric steamer. In this embodiment, the main control chip can directly mark the current boiling point value detected by the temperature sensor as the boiling point temperature value corresponding to the current altitude parameter, or indirectly determine the boiling point temperature value corresponding to the current altitude parameter based on the current air pressure value or the current altitude, so as to further calculate the first temperature limit value corresponding to the boiling point temperature value. The calculation formula of the first temperature limit value is as follows formula (1).

[0066] T N =(100 - T0)×α + 200 (1)

[0067] Among them, T N is the first temperature value, with the unit of °C; T0 is the boiling point temperature value, with the unit of °C; α is the altitude coefficient, and its value range is 2.5 - 5, preferably 3.

[0068] If the first temperature limit value is greater than the maximum temperature limit value, the main control chip marks the maximum temperature limit value as the target temperature limit value corresponding to the current altitude parameter, so as to prevent the steam from being reheated to too high a temperature and damaging the components of the electric steamer. At the same time, the main control chip can also extend the total heating duration of the electric steamer to make up for the temperature limitation of the steam reheating as much as possible and ensure that the ingredients are fully cooked. If the first temperature limit value is less than or equal to the maximum temperature limit value, the main control chip marks the first temperature limit value as the target temperature limit value corresponding to the current altitude parameter, so as to reduce unnecessary heat loss, reduce power waste while ensuring that the ingredients are fully cooked and improving the heating efficiency of the electric steamer. Optionally, the value range of the maximum temperature limit value is 160°C to 240°C, preferably 240°C. The value of the maximum temperature limit value is specifically determined by the temperature resistance parameters of the steam heating device in the electric steamer and the materials at the positions where the steam flows through, and is not strictly limited here.

[0069] S250: Adjust the current temperature limit value of the steam heating device to the target temperature limit value.

[0070] The current temperature limit value refers to the temperature threshold at which the first temperature controller in the steam heating device controls the first heating element to generate heat or stop generating heat at the current moment. In this step, after the main control chip determines the target temperature limit value suitable for the current altitude condition, the main control chip controls the first temperature controller to adjust the current temperature limit value to the target temperature limit value, so that the water vapor generated by the steam generating device through heating can be reheated at the steam heating device, and then the ingredients in the steamer assembly can be fully heated and cooked, and at the same time, the electric steamer can be prevented from overheating, causing component damage or energy waste.

[0071] Please refer to Table 1 to Table 2 below. Table 1 shows the top layer temperature of the steamer assembly when the electric steamer performs cooking work in each altitude area based on the heating control method provided by this application. Table 2 shows the top layer temperature of the steamer assembly when the electric steamer does not reheat the steam and performs cooking work in each altitude area. As shown by the comparison between Table 1 and Table 2, whether the electric steamer is in a low altitude plain area of 42 meters or a high altitude area of 4000 meters, it can adjust the target temperature limit value of the steam heating device by obtaining the current altitude parameter (current boiling point value), and finally keep the top layer temperature of the steamer assembly within the range that can cook the ingredients, and will not be too high to damage the components.

[0072] Table 1: Top layer temperature of the steamer of the electric steamer in this application at different altitudes.

[0073]

[0074] Table 2: Top layer temperature of the steamer of a conventional electric steamer at different altitudes.

[0075]

[0076] In an embodiment of the present application, the heating control method of the electric steamer further includes: adjusting the heating power of the steam generating device so that the steam mass flow rate in the electric steamer is maintained within a preset flow rate range.

[0077] The steam mass flow rate refers to the mass of steam flowing through a pipeline or cross-section per unit time. Generally, if the steam mass flow rate is too high, it will cause the contact time between the steam heating device and the steam to be too short, resulting in insufficient steam heating, or cause the steam flow rate to be too high, resulting in waste of steam heat; while if the steam mass flow rate is too low, it will reduce the cooking efficiency of the electric steamer (i.e., the cooking time required for the ingredients to be fully cooked becomes longer), and it is easy to cause the pressure in the cooking cavity of the electric steamer to be too high, affecting the working stability of the electric steamer. Therefore, the main control chip adjusts the heating power of the steam generating device to keep the evaporation rate of the liquid in the water tank (i.e., the steam generation rate) within a suitable range, and further keep the steam mass flow rate in the electric steamer within the preset flow rate range. Optionally, the preset flow rate range corresponds to 15 g / min to 30 g / min, preferably 20±2 g / min. A suitable steam mass flow rate can keep the heating efficiency of the electric steamer at the best level and effectively reduce energy waste.

[0078] Based on the above solution, the present application calculates the temperature limit value based on the boiling point temperature value corresponding to the current altitude parameter, and can accurately obtain the secondary heating steam temperature (the first temperature limit value) matching the current altitude value, while preventing the electric steamer from overheating and ensuring that the ingredients are fully cooked; the present application compares the first temperature limit value with the maximum temperature limit value and takes the smaller value as the target temperature limit value, which can allow the electric steamer to preferentially select the heating parameters suitable for the current altitude situation within the allowable working parameter range, and maximize the heating efficiency while ensuring the working stability and reliability of the electric steamer; when the first temperature limit value is greater than the maximum temperature limit value, the present application extends the total heating time of the electric steamer, which can improve the degree of ingredient ripening and the cooking quality of the electric steamer; the present application determines the target temperature limit value of the steam heating device in different ways based on different types of altitude regions, which can make the heating operation of the electric steamer more adaptable to the current altitude conditions; the present application also adjusts the heating power of the steam generating device to keep the steam mass flow rate in the electric steamer within the preset flow rate range, so that the steam after secondary heating is fully utilized, improving the heating efficiency of the electric steamer and reducing energy waste. In summary, the present application has the advantages of accurately adapting to altitude conditions, reducing energy waste, improving heating efficiency, ensuring cooking quality, and improving the working stability and reliability of the electric steamer.

[0079] The methods disclosed in several embodiments provided in this application can also be implemented in other ways. The method embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions, and operations of devices, methods, and computer program products according to multiple embodiments of this application. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and a module, a program segment, or a part of code contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that marked in the accompanying drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, as well as the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0080] An embodiment of this application provides a computer-readable storage medium storing a computer program. The computer program can be executed by a main control chip to complete the heating control method of an electric steamer.

[0081] If a function is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in various embodiments of this application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0082] The foregoing is only the preferred embodiment of this application and is not used to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A heating control method for an electric steamer, characterized in that The electric steam cooker includes a body and an altitude detector. A steam generating device and a steam heating device are provided inside the body. The altitude detector is configured to detect the current altitude parameter, and the steam heating device is configured to heat and raise the temperature of the water vapor generated by the steam generating device according to a temperature limit value. The heating control method of the electric steam cooker includes: After starting the heating operation, obtain the current altitude parameter through the altitude detector; Based on the current altitude parameter, determine a target temperature limit value corresponding to the current altitude parameter; Adjust the current temperature limit value of the steam heating device to the target temperature limit value.

2. The heating control method of the electric steam cooker according to claim 1, wherein The determining the target temperature limit value corresponding to the current altitude parameter based on the current altitude parameter includes: Calculate a first temperature limit value based on the boiling point temperature value corresponding to the current altitude parameter; Compare the first temperature limit value with the maximum temperature limit value, and determine the smaller value among them as the target temperature limit value.

3. The heating control method of the electric steam cooker according to claim 2, wherein The calculating the first temperature limit value based on the boiling point temperature value corresponding to the current altitude parameter includes: According to the formula T N = (100 - T0) × α + 200, calculate the first temperature value; where, T N is the first temperature value in °C; T0 is the boiling point temperature value in °C; α is the altitude coefficient with a value range of 2.5 to 5.

4. The heating control method of the electric steam cooker according to claim 2, characterized in that, After comparing the first temperature limit value with the maximum temperature limit value and determining the smaller value among them as the target temperature limit value, the method further includes: If the first temperature limit value is greater than the maximum temperature limit value, extend the total heating duration of the electric steam cooker.

5. The heating control method of the electric steam cooker according to claim 1, wherein, The determining the target temperature limit value corresponding to the current altitude parameter based on the current altitude parameter includes: Based on the preset altitude parameter interval where the current altitude parameter is located, determine the altitude area type corresponding to the current altitude parameter; When the altitude area type is a low altitude area, determine the target temperature limit value as the initial temperature limit value; When the altitude area type is a high altitude area, determine the target temperature limit value corresponding to the current altitude parameter based on the known temperature limit value adjustment rule.

6. The heating control method of the electric steam cooker according to claim 5, characterized in that, The determining the altitude area type corresponding to the current altitude parameter based on the preset altitude parameter interval where the current altitude parameter is located includes: If the current altitude parameter reaches the preset parameter threshold, determine that the altitude area type is a low altitude area; If the current altitude parameter is lower than the preset parameter threshold, determine that the altitude area type is a high altitude area.

7. The heating control method of the electric steam cooker according to claim 5, wherein, The high altitude area corresponds to multiple preset altitude parameter sub - intervals; when the altitude area type is a high altitude area, the determining the target temperature limit value corresponding to the current altitude parameter based on the known temperature limit value adjustment rule includes: According to the altitude parameter sub - interval where the current altitude parameter is located, determine the current altitude range or temperature limit value range corresponding to the current altitude parameter; Based on the endpoint threshold of the current altitude range or the endpoint threshold of the temperature limit value range, determine the target temperature limit value corresponding to the current altitude parameter.

8. The heating control method of the electric steam cooker according to claim 1, wherein, The altitude detector is a temperature sensor or a pressure sensor. The current altitude parameter detected by the electric steam cooker through the temperature sensor is the current boiling point value, and the current altitude parameter detected by the electric steam cooker through the pressure sensor is the current air pressure value; After obtaining the current altitude parameter through the altitude detector, the method further includes: Based on the current boiling point value or the current air pressure value, determine the current altitude value and / or the current altitude range corresponding to the current working location of the electric steamer.

9. The heating control method of the electric steam cooker according to claim 1, characterized in that The heating control method of the electric steamer further includes: Adjust the heating power of the steam generating device so that the steam mass flow rate in the electric steamer is maintained within a preset flow rate range.

10. An electric steam cooker, characterized in that, The electric steamer includes: A body, with a water tank provided inside the body; A steam generating device, which is provided at the bottom end of the water tank; A steam temperature increasing device, which is provided in the water tank. The steam temperature increasing device includes a first temperature controller and a first heating element. The first temperature controller controls the first heating element to heat or stop heating with a target temperature limit value; An altitude detector, which is provided inside the body or on the outer side wall of the body; the altitude detector is configured to detect the current altitude parameter; A main control chip, which is provided inside the body and is electrically connected to the altitude detector, the steam generating device, and the steam temperature increasing device. The main control chip is configured to: Obtain the current altitude parameter; based on the current altitude parameter, determine the target temperature limit value corresponding to the current altitude parameter; adjust the current temperature limit value of the steam temperature increasing device to the target temperature limit value.

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