Water injection amount control method, system and cooking device

Abstract

The application discloses a water injection amount control method and system and a cooking device, and the method comprises the following steps: establishing an experience table database of evaporation time corresponding to different water level heights H and water injection time when the water tank temperature W is established; a water tank water level measurement method, which comprises the following steps: acquiring the disc body temperature of an evaporation disc; injecting a fixed time of water into the evaporation disc to internally evaporate and count time, obtaining the first evaporation time corresponding to the time when the evaporation disc is dried; determining that the disc body temperature is a key factor for determining the first evaporation time t2, correcting the first evaporation time according to the disc body temperature to obtain the first compensation evaporation time; inputting the fixed time and the first compensation evaporation time into the experience database to look up a table, obtaining a calibration water level; calculating the water injection speed according to the calibration water level; and calculating the accurate water injection time based on the water injection speed, the steam amount and the area of the water outlet hole of the water tank. The application has the effect of reducing the influence of water injection errors on cooking.

Description

Technical Field

[0001] This application relates to the field of water injection control technology for food processing equipment, and in particular to a water injection volume control method and system and a cooking device. Background Technology

[0002] Steam ovens or steam ovens on the market can be divided into two types: external evaporator and internal evaporator. The working principle of internal evaporator is to transport water from the water tank to the evaporator, and then generate steam through heating of the evaporator.

[0003] When a steam oven or steam oven is working, the amount of water injected into the evaporation plate is mainly controlled by controlling the time when water is injected into the evaporation plate, thereby controlling the amount of steam.

[0004] However, experience and verification have shown that the water level in the tank itself will affect the flow rate of the water from the outlet; that is, when the evaporator plate is filled with water for the same amount of time, the amount of water filled with the evaporator plate will be different depending on the water level in the tank.

[0005] The above situation results in different amounts of steam generated by the evaporator at different water levels in the tank, which in turn leads to differences in cooking results and affects the user experience. Summary of the Invention

[0006] In order to control the water injection into the evaporation pan relatively precisely and reduce the impact of water injection errors on cooking, this application provides a water injection control method, system and cooking device.

[0007] Firstly, this application provides a method for controlling water injection volume, employing the following technical solution:

[0008] A water injection control method for controlling the water injection volume of an evaporator pan, comprising:

[0009] Establish a tabular experience database; the database records: water tank temperature W, different water level heights H, and water injection time. The corresponding evaporation time ;

[0010] If the water tank level is not calibrated, then update the water tank level data; wherein, updating the water tank level data includes executing a water tank level calculation sub-method;

[0011] If the water level in the tank has been calibrated, then execute the water injection control sub-method;

[0012] The method for measuring the water level in the water tank includes:

[0013] Obtain the plate temperature of the evaporator. ;

[0014] Inject a fixed amount of water into the evaporator pan for a fixed time. The water volume is adjusted and the heating function is activated. An internal evaporation timer is started to obtain the first evaporation time corresponding to the time when the evaporation plate burns dry. ;

[0015] Determine the plate temperature To determine the key factor in the first evaporation time t2, the plate temperature is considered. Time for the first evaporation Correction is performed to obtain the first compensated evaporation time. ;

[0016] Fixed time First compensation for evaporation time Substitute the data into the empirical database to obtain the calibrated water level. ;

[0017] The water injection control sub-method includes:

[0018] Get the pre-stored amount of cooking steam and the area of ​​the water tank outlet ;

[0019] According to the calibrated water level Calculate water injection rate ;

[0020] Based on water injection speed Steam volume and the area of ​​the water tank outlet Calculate the precise water injection time Used to fix the new water injection time for the evaporator.

[0021] Optionally, the internal evaporation timer includes:

[0022] Timing;

[0023] Obtain temperature detection feedback for the evaporator plate;

[0024] Based on temperature feedback, determine if the water in the evaporator has boiled dry. If so, turn off the evaporator heating and record the time taken for this first evaporation phase. .

[0025] Optionally, the first compensation evaporation time Satisfying the formula: ,in, This is the preset temperature compensation coefficient.

[0026] Optionally, the fixed time First compensation for evaporation time Substituting into the experience database to look up tables includes:

[0027] Call the experience database, let , The current water level is obtained by looking up a table using the binary search method and recorded as the calibration water level. .

[0028] Optionally, the step of adjusting the water level according to the calibration level Calculate water injection rate It includes:

[0029] Define water injection speed ;in, Let gravitational acceleration be the acceleration due to gravity, and let the calibrated water level be... .

[0030] Optionally, the calculation of precise water injection time It includes: .

[0031] Optionally, the water injection control sub-method further includes:

[0032] Identify / receive / acquire water injection control parameters for the evaporator pan; wherein, the water injection control parameters include the water injection time for the evaporator pan;

[0033] Obtain and record the temperature of the tray at the start of this water filling process. ;

[0034] If water filling of the evaporator begins, the internal evaporation time is calculated based on the water filling time to obtain the second evaporation time corresponding to when the evaporator burns dry. ;

[0035] Based on the plate temperature The second evaporation time recorded After correction, the second compensated evaporation time is obtained. ;

[0036] Call the experience database, let The water filling time for this evaporation pan is as follows: The current water level is obtained by looking up the table and recorded as the preset second water level. ;

[0037] Calculate the second water level and calibrated water level The difference;

[0038] Determine if the difference is greater than If so, then let If not, then let ;

[0039] in, The first threshold is preset. This represents the cross-sectional area of ​​the water tank. This is the latest calibrated water level, and the calibrated water level used to update the next water injection volume control. .

[0040] Optionally, a sub-method for detecting water tank leakage may also be included;

[0041] The water tank leakage detection sub-method includes:

[0042] Calculate the second water level and calibrated water level The difference;

[0043] Determine if the difference is greater than X. If yes, determine that the water tank is leaking and issue a fault warning; otherwise, calibrate the water level of the tank to the latest calibrated level. ;in, The second threshold is preset, and .

[0044] Secondly, this application provides a water tank water injection control system, which adopts the following technical solution:

[0045] A water tank water injection control system includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed as any of the water injection control methods described above.

[0046] Thirdly, this application provides a cooking apparatus, which adopts the following technical solution:

[0047] A cooking apparatus includes a cooking body, wherein a controller of the cooking body loads and executes a computer program such as any of the water injection control methods described above.

[0048] In summary, this application includes at least one of the following beneficial technical effects:

[0049] 1. No additional sensors are needed to measure the water level in the cooking device;

[0050] 2. Without adding any new sensors, the precise water filling time can be calculated based on the calculated water level in the tank. This allows for precise control of the amount of steam generated. Attached Figure Description

[0051] Figure 1 This application relates to a method for calculating the water level in a water tank.

[0052] Figure 2 This is the water injection control sub-method of this application;

[0053] Figure 3 This is a sub-method for monitoring water tank leakage in this application. Detailed Implementation

[0054] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0055] This application discloses a method for controlling water injection volume.

[0056] Reference Figure 1-3 The water injection volume control method mainly includes three parts:

[0057] Water tank level measurement method;

[0058] Water injection control sub-method; and,

[0059] Sub-method for monitoring water tank leakage.

[0060] One of the prerequisite steps for implementing each of the above sub-methods is:

[0061] Establish a tabular experience database; the database records: water tank temperature W, different water level heights H, and water injection time. The corresponding evaporation time In this embodiment, W is selected as 25°C.

[0062] If the water tank level is not calibrated, update the water tank level data; updating the water tank level data includes executing the water tank level calculation sub-method.

[0063] If the water level in the tank has been calibrated, then execute the water injection control sub-method.

[0064] It is understandable that, in addition to the calculation method mentioned above, there is at least one other way to update the water tank level data: to call up the previous usage record data corresponding to the computer program of this method again; that is, if the water tank is not emptied after the cooking equipment is used, the water tank level can be updated by directly calling the last usage record of the previous time it is turned on for the next use; this is explained in detail below and will not be repeated here.

[0065] In one embodiment of this application, the method for triggering the execution of the water tank level measurement operator is defined as one or more of the following:

[0066] The first method is to determine whether there is water based on the feedback from the built-in sensor of the cooking equipment's water tank. If there is water and it is not calibrated, then the water tank level calculation sub-method is executed.

[0067] The second method assumes that the water tank of the cooking equipment is removable. After the water tank is removed and reinstalled, the water tank level calculation method is executed. Whether the water tank is properly reset can be detected by pre-installed microswitches, photoelectric sensors, etc.

[0068] The following explains each sub-method in detail.

[0069] Reference Figure 1 In one embodiment of this application, the water tank level measurement method includes:

[0070] Obtain the temperature of the evaporation tray (e.g., feedback from a temperature sensor in a steam oven). ;

[0071] If the user enables the steam function of the corresponding device, the water level will be calculated and recorded as the calibrated water level. .

[0072] Regarding water level calculation, it includes:

[0073] S1. Inject a fixed amount of liquid into the evaporator pan for a set time. The amount of water is measured, and the heating function is turned on (i.e., steam is generated through evaporation). An internal evaporation timer is run to obtain the first evaporation time corresponding to when the evaporation plate burns dry. ;

[0074] S2, Determine the disk temperature To determine the key factor in the first evaporation time t2, the first compensated evaporation time is calculated. , ;in, To verify the obtained temperature compensation coefficient, the results are from the manufacturer's practical verification and are fixed values;

[0075] S3, call the experience database, and , The current water level can be obtained by looking up the table.

[0076] Regarding the aforementioned internal evaporation timing, specifically:

[0077] Timing;

[0078] Obtain temperature detection feedback on the evaporator tray (i.e., the steam oven has at least one temperature probe detecting the temperature of the evaporator tray); and...

[0079] Based on temperature detection feedback, determine whether the water in the evaporator has boiled dry (e.g., the temperature suddenly exceeds a certain threshold). If so, turn off the evaporator heating and record the first evaporation time. .

[0080] In step S3 above, a table lookup is required. To speed up the table lookup, this embodiment preferably uses a binary search method.

[0081] Based on the above, when this method is applied to a steam oven, it can automatically calculate the water level in the tank without the need for additional sensors, and can even be used for display to show the user.

[0082] Once the water level is calibrated, the water injection time can be calculated to control the amount of water injected.

[0083] Reference Figure 2 In one embodiment of this method, the water injection control sub-method includes:

[0084] Get the pre-stored amount of cooking steam ;

[0085] Define water injection speed , Where g is the acceleration due to gravity; let ;

[0086] Calculate the precise water injection time , ;in, This is the area of ​​the water outlet hole in the water tank.

[0087] Understandably, in the context of this application, due to the cross-sectional area of ​​the water tank... Much larger than the cross-sectional area of ​​the bottom hole Since the change in water level during the outflow process is negligible, Torricelli's law can be applied to determine the injection rate. .

[0088] Based on the above, the precise water injection time for one steam-bake cycle can be obtained. However, steaming and baking are not used only once. Therefore, the further water injection control sub-method also includes:

[0089] Identify / receive / acquire water injection control parameters for the evaporator pan; among which, the water injection control parameters include the water injection time for the evaporator pan;

[0090] Obtain and record the temperature of the tray at the start of this water filling process. ;

[0091] If water filling of the evaporator begins, the internal evaporation time is calculated based on the water filling time to obtain the second evaporation time corresponding to when the evaporator burns dry. ;

[0092] Based on the plate temperature The second evaporation time recorded After correction, the second compensated evaporation time is obtained. ;

[0093] Call the experience database, let The water filling time for this evaporation pan is as follows: The current water level is obtained by looking up the table and recorded as the preset second water level. ;

[0094] Calculate the second water level and calibrated water level The difference;

[0095] Determine if the difference is greater than If so, then let If not, then let ;

[0096] in, The first threshold is a preset threshold, while the second threshold is an empirical threshold. This represents the cross-sectional area of ​​the water tank. This is the latest calibrated water level, and the calibrated water level used to update the next water injection volume control. .

[0097] Based on the above, this application can use the duration of each water injection to calculate the height of the self-correcting water level; simultaneously, without adding any new sensors, it can... Precisely control the amount of steam generated.

[0098] It is understandable that the aforementioned identification / receiving / acquiring of the water injection control parameters for the evaporator pan can be:

[0099] The first type is t1 used for the initial calibration of the water tank;

[0100] The second type is the t4 used for each precise water injection control after calibration.

[0101] The third method involves manual intervention, controlling the input / write of a specific water injection duration value to the control equipment.

[0102] Reference Figure 3 In one embodiment of this application, a water tank leakage detection sub-method includes:

[0103] Calculate the second water level and calibrated water level The difference;

[0104] Determine if the difference is greater than X. If yes, determine that the water tank is leaking and issue a fault warning; otherwise, calibrate the water level of the tank to the latest calibrated level. .

[0105] Understandable, This value represents the second threshold. At different heights, the water injection should be within a reasonable range. If it exceeds this range, it may be due to physical leakage. .

[0106] Based on the above, this method can determine whether a water tank is leaking based on the error in the water level height during the calculation process.

[0107] In summary, this application enables steam ovens to automatically calculate water level and precisely control steam generation, and can also be combined with this technology to create new functionalities, such as:

[0108] For foods that have strict requirements on humidity, such as selecting the tenderness level when roasting meat;

[0109] Real-time display of water tank level;

[0110] The system can predict the water level in the tank before cooking and remind users to add water in real time.

[0111] A new mode could be developed that combines steaming and baking functions, with multiple levels of adjustable steam volume;

[0112] By using the error in water level, it is possible to determine whether the water tank is leaking.

[0113] This application discloses a water tank water injection control system.

[0114] The water tank water volume control system includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed as any of the water volume control methods described above.

[0115] This application discloses a cooking apparatus.

[0116] The cooking appliance can be a steam oven, a steam oven, or an integrated stove with a steam oven or a steam oven.

[0117] Cooking apparatus, including cooking body; it is understood that the body is such as: a steam oven with basic temperature sensors and other steaming and baking functions, with at least one controller for overall control, rather than a purely mechanical, non-feedback steam oven.

[0118] The controller of the cooking unit loads and executes a computer program of any of the water injection control methods described above to achieve the corresponding cooking function.

[0119] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A water injection amount control method for controlling a water injection amount of an evaporation pan, characterized by, Comprising: An experience database in table form is established; wherein the database records: when the water tank temperature W is, the different water level height H, the water injection time The corresponding evaporation time consumption ; If the water tank water level is not calibrated, update the water tank water level data; wherein the water tank water level data updating comprises executing a water tank water level measuring method; If the water tank water level has been calibrated, execute a water injection control sub-method; The water tank water level measuring method comprises: Acquiring a pan temperature of an evaporation pan ; Inject a fixed amount of water into the evaporator pan for a fixed time. The water volume is adjusted and the heating function is activated. An internal evaporation timer is started to obtain the first evaporation time corresponding to the time when the evaporation plate burns dry. ; Determining the temperature of the disk body The temperature of the disk body is determined as a key factor for determining the first evaporation time t2 The first evaporation time t2 is corrected according to the temperature of the disk body The first evaporation time t2 is corrected according to the temperature of the disk body The first evaporation time t2 is corrected according to the temperature of the disk body Fixed time , first compensation evaporation time Substitute the experience database table to get the calibration water level ; The water injection control sub-method comprises: Acquiring a pre-stored amount of cooking steam And the mouth area of the water outlet hole of the water tank ; According to the calibrated water level Calculating the injection rate ; based on the water injection speed , the amount of steam , and the mouth area of the water outlet hole of the water tank , to calculate the accurate water injection time , which is used as the new water injection fixed duration for the evaporation tray The first compensation evaporation time consumption satisfies the formula: wherein, is a preset temperature compensation coefficient.

2. The water injection amount control method according to claim 1, characterized by, The internal evaporation timing comprises: Timing; Obtaining temperature detection feedback of the evaporation tray; According to the temperature detection feedback, it is judged whether the water in the evaporation tray is dried, if yes, the evaporation tray heating is turned off, and the first evaporation time consumption in this section is recorded .

3. The water injection amount control method according to claim 1, characterized by, the fixed time , the first compensation evaporation time substitute into the experience database lookup table, which includes: Call the experience database, make , , and get the current water level by binary search table, recorded as the calibration water level .

4. The water injection amount control method according to claim 1, characterized by, The calibration water level Calculating the injection rate It includes: Defining the injection rate ; where is the gravitational acceleration, and let the calibrated water level .

5. The water injection amount control method according to claim 4, characterized by, The computing precise water injection time comprising: .

6. The water injection amount control method according to claim 1, characterized by, The water injection control sub-method further comprises: Identifying / receiving / acquiring water injection control parameters of the evaporation tray; wherein the water injection control parameters comprise water injection time of the evaporation tray; Acquire and record the disc temperature at the start of this water injection ; If the water injection of the evaporation tray starts, internal evaporation timing is performed based on the water injection time of the evaporation tray, and a second evaporation time consumption corresponding to the time when the evaporation tray is dried is obtained ; According to the temperature of the disk body The second evaporation time of the record The second evaporation time of the record ; Call experience database, make For this time, the evaporation disc water injection time, , look up the current water level, recorded as the second preset water level ; computing a second water level and the difference between the calibrated water level ​ determining whether the difference is greater than if so, setting the value of the variable ; if not, setting the value of the variable ; wherein, is a preset first threshold value; is a cross-sectional area of the water tank; is the latest calibrated water level, and is used to update the calibrated water level for the next water injection amount control .

7. The water injection amount control method according to claim 6, characterized by: Further comprising a water tank leakage monitoring sub-method; The water tank leakage monitoring sub-method comprises: computing the difference between the second water level and the calibrated water level ​ determining whether the difference is greater than X, if yes, determining that the water tank leaks, and giving a fault warning; if no, determining the water level of the water tank as the latest determined water level ; wherein, is a preset second threshold value, and .

8. A water tank water filling amount control system characterized by, A device comprising a memory and a processor, the memory storing a computer program capable of being loaded and executed by the processor to perform any one of the water injection amount control methods of claims 1 to 7.

9. A cooking apparatus comprising a cooking body, characterized by: The controller of the cooking body loads and executes the computer program of any one of the water injection amount control methods of claims 1 to 7.

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