Method for determining preheating duration and heating device

Abstract

The application relates to a preheating time length determination method, comprising the following steps: S10, carrying out power-off processing on a heating module, recording the power-off time length and voltage value of a target capacitor in the heating module, and determining the corresponding relationship between the power-off time length and the voltage value of the target capacitor; S20, carrying out power-off and power-on processing on the heating module, recording the power-off time length of the target capacitor and the preheating time length required for the heating module to heat a target object to a preset state, and determining the corresponding relationship between the power-off time length and the preheating time length; S30, when the heating module starts heating each time, the voltage value of the target capacitor is acquired, the corresponding power-off time length is determined according to the corresponding relationship between the voltage value of the target capacitor and the power-off time length, and the corresponding preheating time length is determined according to the corresponding relationship between the power-off time length and the preheating time length. The application also provides a heating device. The preheating time length is determined without a temperature sensor, and the design difficulty of the heating module is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heating equipment, in particular to a preheating time determination method and a heating equipment. BACKGROUND

[0002] For some heating equipment with short heating period and multiple repeated power-off and restart, the initial temperature of the heating module at the start of each heating period needs to be obtained. After starting heating, the heating module first raises the initial temperature to the working temperature (i.e., preheating is needed, and the preheating time is equivalent to the compensation for the heating time), and then completes the heating treatment of the target while maintaining the working temperature.

[0003] For example, in daily life, a toaster (also known as a bread toaster) is used. After each piece of bread is toasted, the device ejects the current piece of bread, the heating module is powered off and stops working, and the user takes away the ejected piece of bread. Then, the user puts the next piece of bread to be toasted into the device and powers on the heating module again. Since the time for replacing the bread is uncertain (completely determined by the user's operation speed), the initial temperature at the start of each heating is different. Therefore, when the heating module is powered on again, the current initial temperature of the heating module needs to be fed back to the controller (or control chip), and the controller adjusts the preheating time of the current bread toasting according to the current initial temperature.

[0004] For the above-mentioned heating equipment, in order to obtain the initial temperature of the heating module at the start, a temperature sensor (such as a common NTC, English full name Negative Temperature Coefficient) is usually arranged on the heating module. The initial temperature is obtained by using the temperature sensor, which has the following disadvantages: it increases the structural design difficulty of the heating module, and may cause risks and uncertainties in subsequent product maintenance. The temperature sensor may be loose or even fall off. SUMMARY

[0005] Therefore, the present application provides a preheating time determination method, which uses the characteristics of a capacitor and the heating experiment of a heating module to determine the power-off time of the heating module through the voltage value of the target capacitor, and then determines the preheating time required by the heating target object through the power-off time, thereby realizing the determination of the preheating time without the need for a temperature sensor, reducing the design difficulty of the heating module, and reducing the risks and uncertainties that may be caused in subsequent product maintenance.

[0006] A preheating time determination method, comprising the steps of:

[0007] S10: performing a power-off process on the heating module, recording a power-off duration and a voltage value of the target capacitor in the heating module, and determining a corresponding relationship between the power-off duration and the voltage value of the target capacitor;

[0008] S20: performing a power-off and power-on process on the heating module, recording a power-off duration of the target capacitor and a preheating duration required for the heating module to heat the target object to a preset state, and determining a corresponding relationship between the power-off duration and the preheating duration;

[0009] S30: when the heating module starts heating each time, after obtaining the voltage value of the target capacitor, determining the corresponding power-off duration according to the corresponding relationship between the voltage value of the target capacitor and the power-off duration, and then determining the corresponding preheating duration according to the corresponding relationship between the power-off duration and the preheating duration.

[0010] The determination method of the preheating duration uses the discharge characteristics of the capacitor. When the heating module is powered off, the corresponding relationship between the power-off duration and the voltage value of the target capacitor is determined by recording the power-off duration and the voltage value of the target capacitor. Therefore, in the subsequent step, when the heating module recovers from the power-off state to the power-on state, the power-off duration of the heating module can be determined by the obtained voltage value of the target capacitor. At the same time, by performing a heating experiment on the target object that needs to be heated by the heating module, the corresponding relationship between the power-off duration and the preheating duration is determined by recording the power-off duration of the target capacitor and the preheating duration required for the heating module to heat the target object to a preset state. Therefore, in the subsequent step, when the heating module recovers from the power-off state to the power-on state, the preheating duration of the heating module to heat the target object to a preset state can be determined by the determined power-off duration of the target capacitor. By the above design, the characteristics of the capacitor and the heating experiment of the heating module are used to determine the power-off duration of the heating module by the voltage value of the target capacitor, and then the preheating duration required for heating the target object is determined by the power-off duration, which realizes the determination of the preheating duration without the temperature sensor, reduces the design difficulty of the heating module, and reduces the risk and uncertainty that may be brought in the subsequent product maintenance.

[0011] In one of the embodiments, in step S10, the power-off duration of the target capacitor is monitored from the start of the power-off of the heating module, and each power-off duration and the corresponding voltage value are recorded in turn at a preset time interval.

[0012] In one of the embodiments, in step S10, the voltage value of the target capacitor is monitored from the start of the power-off of the heating module, and each voltage value and the corresponding power-off duration are recorded in turn at a preset voltage difference.

[0013] In one of the embodiments, in step S10, the method for determining the corresponding relationship between the voltage value of the target capacitor and the power-off duration is: making a table about the relationship between the voltage value and the power-off duration according to the recorded voltage value and power-off duration; accordingly, in step S30, after obtaining the voltage value of the target capacitor, the corresponding power-off duration is obtained by looking up the table.

[0014] In one of the embodiments, in step S10, the method for determining the corresponding relationship between the voltage value of the target capacitor and the power-off duration is: making a discharge curve of the target capacitor according to the voltage value of the target capacitor and the corresponding power-off duration, and performing segmentation processing to obtain several discharge partitions; then, according to the coordinate values at both ends of each discharge partition, a linear relationship formula y1=ax1+b is determined, wherein y1 is the voltage value and the unit is V, x1 is the power-off duration and the unit is s, a is a constant and has no unit, and b is a constant and the unit is V; accordingly, in step S30, the discharge partition where the obtained voltage value is located is determined and substituted into the corresponding relationship formula y1=ax1+b to calculate the corresponding power-off duration.

[0015] In one of the embodiments, in step S20, the method for determining the corresponding relationship between the power-off duration and the preheating duration is: making a table about the relationship between the power-off duration and the preheating duration according to the recorded power-off duration and preheating duration; accordingly, in step S30, after determining the power-off duration of the target capacitor, the corresponding preheating duration is obtained by looking up the table.

[0016] In one of the embodiments, in step S20, the method for determining the corresponding relationship between the power-off duration and the preheating duration is: obtaining a preheating curve of the heating module according to the power-off duration of the target capacitor and the preheating duration required for heating to a preset state, and performing segmentation processing to obtain several preheating partitions; then, according to the coordinate values at both ends of each preheating partition, a linear relationship formula y2=αx2+β is determined, wherein y2 is the power-off duration and the unit is s, x2 is the preheating duration and the unit is s, α is a constant and has no unit, and β is a constant and the unit is s; accordingly, in step S30, the power-off duration is substituted into the corresponding relationship formula y2=αx2+β to calculate the preheating duration of this heating.

[0017] In one of the embodiments, in the heating module, the target capacitor is connected to a control chip, and the voltage value of the target capacitor is read by the control chip.

[0018] Meanwhile, the application also provides a heating device.

[0019] A heating device controlled by the method for determining the preheating duration according to any one of the embodiments.

[0020] The aforementioned heating device utilizes the characteristics of capacitors and heating experiments of heating modules to determine the power-off duration of the heating module through the voltage value of the target capacitor. In turn, it determines the preheating duration required to heat the target object through the power-off duration. This achieves the determination of the preheating duration without the need for temperature sensors, reducing the design difficulty of the heating module and minimizing potential risks and uncertainties in subsequent product maintenance. Attached Figure Description

[0021] Figure 1 This is a flowchart illustrating a method for determining the preheating time according to an embodiment of the present invention.

[0022] Figure 2 for Figure 1 The table showing the experimental data of the voltage value of the target capacitor during power-off and the power-off time in the method for determining the preheating time;

[0023] Figure 3 Based on Figure 2 The discharge curve is obtained from the experimental data table showing the voltage value of the target capacitor during power-off versus the duration of power-off.

[0024] Figure 4 for Figure 1 The experimental data table showing the power-off time of the target capacitor and the preheating time required for the heating module to heat the target object to the preset state in the method for determining the preheating time is shown.

[0025] Figure 5 Based on Figure 4 The preheating curve is obtained from the experimental data table showing the power-off time of the target capacitor and the preheating time required for the heating module to heat the target object to the preset state.

[0026] Figure 6 for Figure 1 A partial view of the circuitry in the heating module of the method for determining the preheating time shown. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] In the description of the application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0029] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0030] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0032] It is to be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms as used herein are for the purpose of illustration only and do not in any way limit the scope of the present application.

[0033] As shown in FIG. 1, it is a method for determining the preheating time length according to an embodiment of the present application. Figures 1 to 5

[0034] As shown in FIG. 2, the method for determining the preheating time length comprises the following steps: Figure 1

[0035] S10: power off the heating module, record the power-off time length and voltage value of the target capacitor in the heating module, and determine the corresponding relationship between the power-off time length and voltage value of the target capacitor.

[0036] For the recording method of the power-off time length and voltage value of the target capacitor in the heating module in step S10, there can be multiple methods.

[0037] For example, in step S10, the power-off time length of the target capacitor is monitored from the start of the power-off of the heating module, and each power-off time length and the corresponding voltage value are recorded in sequence at a preset time interval. Specifically, for example, the tester can record the power-off time length and the corresponding voltage value once every 10s (which can be defined by the user) from the start of the power-off of the heating module. It should be noted that in some embodiments, each recording time point can also be self-defined and is not limited to a certain time interval.

[0038] For another example, in step S10, the voltage value of the target capacitor is monitored from the start of the power-off of the heating module, and each voltage value and the corresponding power-off time length are recorded in sequence at a preset voltage difference. Specifically, for example, the tester can record the voltage value and the corresponding power-off time length once every 10% of the voltage value drop from the start of the power-off of the heating module.

[0039] As shown in FIG. 3, it is an application example of an experimental data table of the voltage value and power-off time length of the target capacitor obtained through experiments. Figure 2

[0040] Further, in step S10, after obtaining the data of the voltage value and power-off time length of the target capacitor through experiments, there are multiple ways to determine the relationship between the voltage value and power-off time length.

[0041] For example, a relationship table of the voltage value and power-off time length is made according to the recorded voltage value and power-off time length.​​​

[0042] For example, based on the voltage value of the target capacitor and the corresponding power-off duration, a discharge curve of the target capacitor is created and segmented to obtain several discharge zones. Then, based on the coordinate values ​​at both ends of each discharge zone, the linear relationship between the voltage value and the power-off duration in each discharge zone is determined: y1 = ax1 + b; where y1 is the voltage value in V, x1 is the power-off duration in s, a is a constant with no unit, and b is a constant in V. Figure 3 As shown, it is based on Figure 2 The discharge curve obtained from the experimental data table of the voltage value of the target capacitor during power-off and the duration of power-off, by dividing the nearly linearly correlated region into the same discharge zone, can yield multiple discharge zones and thus multiple relationships.

[0043] S20: Perform power-off and power-on processing on the heating module, record the power-off duration of the target capacitor and the preheating duration required for the heating module to heat the target object to the preset state, and determine the correspondence between the power-off duration and the preheating duration.

[0044] It should be further explained that, in this embodiment, the preheating time required to heat the target object to a preset state specifically refers to the preheating time required to heat a specific object to be heated (e.g., a slice of bread of a specific type and size) to a specific state (e.g., to a soft or crispy state).

[0045] like Figure 4 As shown, this is an application example of an experimental data table that obtains the power-off time of the target capacitor and the preheating time required for the heating module to heat the target object to a preset state.

[0046] In step S20, after obtaining data on the power-off duration of the target capacitor and the preheating duration required for the heating module to heat the target object to the preset state through experiments, there are multiple ways to determine the relationship between the power-off duration and the preheating duration.

[0047] For example, create a table showing the relationship between power outage duration and preheating duration based on the recorded power outage duration and preheating duration.

[0048] For example, based on the power-off duration of the target capacitor and the preheating time required to heat to a preset state, a preheating curve for the heating module is obtained and segmented to obtain several preheating zones. Then, based on the coordinate values ​​at both ends of each preheating zone, the linear relationship between the power-off duration and the preheating time in each preheating zone is determined: y² = αx² + β; where y² is the power-off duration in seconds, x² is the preheating time in seconds, α is a constant with no unit, and β is a constant in seconds. Figure 5 As shown, it is based on Figure 4The preheating curve chart is drawn according to the experimental data of the power-off duration of the target capacitor and the preheating duration required for the heating module to heat the target object to the preset state, the area close to the linear correlation is divided into the same preheating partition, a plurality of preheating partitions can be obtained, and then a plurality of relational expressions are obtained, and each preheating partition corresponds to a relational expression.

[0049] S30: When the heating module starts heating each time, the voltage value of the target capacitor is obtained, the corresponding power-off duration is determined according to the corresponding relationship between the voltage value of the target capacitor and the power-off duration, and the corresponding preheating duration is determined according to the corresponding relationship between the power-off duration and the preheating duration.

[0050] Further, after obtaining the voltage value of the target capacitor, there are multiple methods for determining the subsequent power-off duration and preheating duration.

[0051] The determination method for the power-off duration is as follows:

[0052] For example, if the relationship table of the voltage value and the power-off duration is obtained in step S10, the power-off duration corresponding to the voltage value can be found by looking up the table in step S30.

[0053] For example, if a plurality of discharge partitions are divided in step S10, and the linear correlation relationship of the voltage value and the power-off duration in each discharge partition is obtained: y1=ax1+b, the discharge partition where the obtained voltage value is located is determined, and the corresponding power-off duration is calculated by substituting the corresponding relationship y1=ax1+b.

[0054] The determination method for the preheating duration is as follows:

[0055] For example, if the relationship table of the power-off duration and the preheating duration is obtained in step S20, the preheating duration corresponding to the voltage value can be found by looking up the table in step S30.

[0056] For example, if a plurality of preheating partitions are divided in step S20, and the linear correlation relationship of the power-off duration and the preheating duration in each preheating partition is obtained: y2=αx2+β, the preheating partition where the power-off duration is located is determined, and the corresponding preheating duration is calculated by substituting the corresponding relationship y2=αx2+β.

[0057] In addition, in the embodiment, the target capacitor is a component set specifically, and is not a capacitor already existing in a conventional heating module. In addition, there are at least two ways to obtain the voltage value of the target capacitor. Way one, in the heating module, the target capacitor is connected to the control chip, and the voltage value of the target capacitor is read through the control chip. For example, as shown in Figure 6As shown, a partial view of the circuit in the heating module is shown, connecting the target capacitor C1 to the VIN pin of the control chip U1, and reading the voltage value of the target capacitor C1 through the AD converter in the control chip U1. Mode two, the peripheral circuit for reading the voltage value of the target capacitor can be set.

[0058] Working principle:

[0059] Utilize the discharge characteristics of the capacitor, when the heating module is powered off, by recording the power-off duration and voltage value of the target capacitor, and then determining the corresponding relationship between the power-off duration and voltage value of the target capacitor, therefore, in the subsequent step, when the heating module recovers from the power-off state to the power-on state, by the voltage value of the target capacitor obtained, the power-off duration of the heating module can be determined. At the same time, by carrying out a heating experiment on the target object required to be heated by the heating module, by powering off and powering on the heating module, recording the power-off duration of the target capacitor and the preheating duration required for the heating module to heat the target object to a preset state, and then determining the corresponding relationship between the power-off duration and the preheating duration, therefore, in the subsequent step, when the heating module recovers from the power-off state to the power-on state, by the determined power-off duration of the target capacitor, the preheating duration of the heating module to heat the target object to a preset state can be determined.

[0060] The above-mentioned preheating duration determination method utilizes the characteristics of the capacitor and the heating experiment of the heating module, determines the power-off duration of the heating module through the voltage value of the target capacitor, and then determines the preheating duration required for heating the target object through the power-off duration, thereby realizing the determination of the preheating duration without the need for a temperature sensor, reducing the design difficulty of the heating module and reducing the risk and uncertainty that may be brought about in subsequent product maintenance.

[0061] Meanwhile, the present application also provides a heating device.

[0062] The heating device is controlled by the above-mentioned preheating duration determination method of the embodiment.

[0063] The above-mentioned heating device utilizes the characteristics of the capacitor and the heating experiment of the heating module, determines the power-off duration of the heating module through the voltage value of the target capacitor, and then determines the preheating duration required for heating the target object through the power-off duration, thereby realizing the determination of the preheating duration without the need for a temperature sensor, reducing the design difficulty of the heating module and reducing the risk and uncertainty that may be brought about in subsequent product maintenance.

[0064] The technical features of the above embodiments can be combined in any way, in order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of these technical features does not exist contradictory, it should be considered as the scope of the present application.

[0065] The above embodiments only express the preferred embodiments of the present application, which are described in a more specific and detailed manner, but cannot be understood as a limitation to the scope of the patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, which are all within the scope of protection of the present application. Therefore, the scope of protection of the present application patent should be subject to the appended claims.

Claims

1. A method for determining preheating time, characterized in that, Including the following steps: S10: Power off the heating module, record the power-off duration and voltage value of the target capacitor in the heating module, and determine the correspondence between the power-off duration and voltage value of the target capacitor. S20: Perform power-off and power-on processing on the heating module, record the power-off duration of the target capacitor and the preheating duration required for the heating module to heat the target object to the preset state, and determine the correspondence between the power-off duration and the preheating duration; S30: Each time the heating module starts heating, after obtaining the voltage value of the target capacitor, the corresponding power-off duration is determined according to the correspondence between the voltage value of the target capacitor and the power-off duration, and the corresponding preheating duration is determined according to the correspondence between the power-off duration and the preheating duration. In step S10, the method for determining the correspondence between the voltage value of the target capacitor and the power-off duration is as follows: a table showing the relationship between the voltage value and the power-off duration is created based on the recorded voltage value and power-off duration; correspondingly, in step S30, after obtaining the voltage value of the target capacitor, the corresponding power-off duration is obtained by looking up the table. Alternatively, based on the voltage value of the target capacitor and the corresponding power-off duration, a discharge curve of the target capacitor is created and segmented to obtain several discharge zones. Then, based on the coordinate values ​​at both ends of each discharge zone, the linear relationship between the voltage value and the power-off duration in each discharge zone is determined: y1 = ax1 + b; where y1 is the voltage value in V, x1 is the power-off duration in s, a is a constant without units, and b is a constant in V. Accordingly, in step S30, the discharge zone where the obtained voltage value is located is determined and substituted into the corresponding relationship y1 = ax1 + b to calculate the corresponding power-off duration. In step S20, the method for determining the correspondence between the power-off duration and the preheating duration is as follows: based on the power-off duration of the target capacitor and the preheating duration required to heat to the preset state, the preheating curve of the heating module is obtained and segmented to obtain several preheating zones; then, based on the coordinate values ​​at both ends of each preheating zone, the linear relationship between the power-off duration and the preheating duration in each preheating zone is determined: y2=αx2+β; where y2 is the power-off duration in seconds, x2 is the preheating duration in seconds, α is a constant without units, and β is a constant in seconds; correspondingly, in step S30, the power-off duration is substituted into the corresponding relationship y2=αx2+β to calculate the preheating duration for this heating.

2. The method for determining the preheating time according to claim 1, characterized in that, In step S10, the power-off duration of the target capacitor is monitored starting from the power-off of the heating module, and each power-off duration and corresponding voltage value are recorded sequentially according to a preset time interval.

3. The method for determining the preheating time according to claim 1, characterized in that, In step S10, the voltage value of the target capacitor is monitored starting from the power-off of the heating module, and each voltage value and the corresponding power-off duration are recorded sequentially according to the preset voltage difference.

4. The method for determining the preheating time according to claim 1, characterized in that, In the heating module, the target capacitor is connected to the control chip, and the voltage value of the target capacitor is read through the control chip.

5. A heating device, characterized in that, The preheating time is controlled using the method for determining the preheating time as described in any one of claims 1 to 4.

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