阅读说明：本技术 功率控制方法及电烧水杯 (Power control method and electric water boiling cup ) 是由 刘桥 刘柏良 方涛 梁辉 文茂阳 于 2020-05-27 设计创作，主要内容包括：本公开提供一种功率控制方法及电烧水杯,涉及电子产品技术领域。电烧水杯具有发热体、功率控制器件和微控制器,方法包括获得所述电烧水杯工作状态的电网电压,实时获得所述功率控制器件的当前温度；根据获得的电网电压和当前温度确定所述发热体实时的目标加热功率,并通过所述功率控制器件控制所述发热体根据所述目标加热功率进行加热,以实现对所述发热体的加热功率的动态控制,从而快速可靠的实现加热。(The disclosure provides a power control method and an electric water boiling cup, and relates to the technical field of electronic products. The method comprises the steps of obtaining the power grid voltage of the working state of the electric water boiling cup and obtaining the current temperature of the power control device in real time; and determining the real-time target heating power of the heating element according to the obtained power grid voltage and the current temperature, and controlling the heating element to heat according to the target heating power through the power control device so as to realize dynamic control of the heating power of the heating element, thereby quickly and reliably realizing heating.)

1. A power control method applied to an electric water boiling cup having a heat generating body, a power control device and a microcontroller, the method comprising the following steps performed by the microcontroller:

obtaining the power grid voltage of the working state of the electric water boiling cup;

obtaining the current temperature of the power control device in real time;

and determining the real-time target heating power of the heating element according to the obtained power grid voltage and the current temperature, and controlling the heating element to heat according to the target heating power through the power control device so as to realize dynamic control of the heating power of the heating element.

2. The power control method according to claim 1, wherein the heating element comprises a heating resistor, the resistance value of the heating resistor is a fixed value, and the step of determining the real-time target heating power of the heating element according to the obtained grid voltage and the current temperature comprises the following steps:

calculating the maximum heating power of the heating body according to the fixed value and the obtained power grid voltage;

and obtaining the real-time target heating power of the heating body under the power grid voltage and the current temperature according to the corresponding relation of the pre-stored coefficient multiplied by the maximum heating power and each temperature under the power grid voltage, wherein the coefficient range is 0 to 1.

3. The power control method according to claim 2, wherein the electric water boiler supports at least two grid voltages, and the microcontroller is pre-stored with a corresponding relationship between each temperature and a coefficient multiplied by a corresponding maximum heating power at each grid voltage, wherein the maximum heating powers of the heating elements corresponding to different grid voltages are different.

4. The power control method according to claim 3, wherein the maximum heating power Pmax of the heating element at each grid voltage is (U ═ c²and/R), wherein U is the current power grid voltage, R is the resistance value of the heating resistor, and 80 omega is larger than or equal to R and larger than or equal to 40 omega.

5. The power control method according to claim 3, wherein the correspondence relationship between the respective temperatures at each grid voltage and the coefficient by which the respective maximum heating powers are multiplied, which is pre-stored in the microcontroller, comprises:

when the temperature is less than the first threshold value, the multiplying coefficient of the corresponding maximum heating power is 1;

when the temperature is greater than the second threshold value, the coefficient multiplied by the corresponding maximum heating power is 0;

when the temperature is between the first threshold value and the second threshold value, the coefficient multiplied by the corresponding maximum heating power is more than 0 and less than 1;

wherein the first threshold is less than the second threshold.

6. The electric water boiling cup is characterized in that the capacity of the electric water boiling cup is less than or equal to 500ml, the electric water boiling cup comprises a power grid detection circuit, a temperature sensor, a heating body, a power control device and a microcontroller, the power grid detection circuit, the temperature sensor, the heating body, the power control device and the microcontroller are integrated on a circuit board, and the integrated whole width is less than 7cm and the height is less than 2.5 cm;

the power grid detection circuit is used for obtaining the power grid voltage of the electric water boiling cup in the working state and transmitting the power grid voltage to the microcontroller;

the temperature sensor is used for acquiring the current temperature of the power control device in real time and transmitting the current temperature to the microcontroller;

the microcontroller is used for obtaining the power grid voltage transmitted by the power grid detection circuit and the current temperature obtained by the temperature sensor in real time, determining the real-time target heating power of the heating element according to the obtained power grid voltage and the current temperature, and controlling the heating element to heat according to the target heating power through the power control device so as to realize dynamic control of the heating power of the heating element.

7. The electric water boiling cup according to claim 6, wherein the heating element comprises a heating resistor, the resistance value of the heating resistor is a fixed value, the microcontroller is configured to calculate the maximum heating power of the heating element according to the fixed value and the obtained grid voltage, and obtain the real-time target heating power of the heating element at the grid voltage and the current temperature according to the pre-stored correspondence between the temperatures at the grid voltage and the coefficient multiplied by the maximum heating power, wherein the coefficient range is 0 to 1.

8. The electric water boiling cup according to claim 6, wherein the power control device comprises a silicon controlled rectifier and a zero-crossing detection circuit, the silicon controlled rectifier being adjacent to the temperature sensor.

9. The electric water boiling cup according to claim 7, wherein the electric water boiling cup supports at least two kinds of power grid voltages, and the microcontroller is pre-stored with a corresponding relationship between each temperature and a coefficient multiplied by a corresponding maximum heating power for each kind of power grid voltage, wherein the maximum heating power of the heat generating body is different for different power grid voltages, and the maximum heating power Pmax of the heat generating body is (U) for each kind of power grid voltage²and/R), wherein U is the current power grid voltage, R is the resistance value of the heating resistor, and 80 omega is larger than or equal to R and larger than or equal to 40 omega.

10. The electric water boiling cup according to claim 9, wherein the correspondence relationship between each temperature and the coefficient multiplied by the corresponding maximum heating power for each grid voltage pre-stored in the microcontroller comprises:

when the temperature is less than the first threshold value, the multiplying coefficient of the corresponding maximum heating power is 1;

when the temperature is greater than the second threshold value, the coefficient multiplied by the corresponding maximum heating power is 0;

when the temperature is between the first threshold value and the second threshold value, the coefficient multiplied by the corresponding maximum heating power is more than 0 and less than 1;

wherein the first threshold is less than the second threshold.

Technical Field

The disclosure relates to the technical field of electronic devices, in particular to a power control method and an electric water boiling cup.

Background

Along with the improvement of science and technology development and people's standard of living, electric beaker more and more uses for people in various scenes, for example, along with the travelling is frequent day by day, small-size portable electric heat cup is used on a large scale because of small, multi-functional, greatly satisfied people's trip demand. In order to meet the market demands of travel and travel, the volume of the electric water boiling cup on the market at present needs to be designed to be small, exquisite and light, so that the available circuit space is compact, the heat dissipation space of a power device is limited, the power of the product is limited due to the limited heat dissipation capacity, and the power device is overheated to lose efficacy if the power design is too large in the limited heat dissipation space, so that safety accidents occur. For example, assuming that the power grid voltage in china is about 220V, the power grid voltage in japan, usa and other regions is about 110V, the maximum heating power design is performed based on the 220V power grid voltage, and the power of the same electric water boiler in china is about 300W, so that the heating power in japan, usa and other regions is greatly reduced, and only about 75W, and the heating speed is greatly reduced.

Disclosure of Invention

In view of the above, the present disclosure provides a power control method and an electric water boiler.

A power control method applied to an electric water boiling cup having a heat generating body, a power control device and a microcontroller, the method comprising the following steps performed by the microcontroller:

obtaining the power grid voltage of the working state of the electric water boiling cup;

obtaining the current temperature of the power control device in real time;

and determining the real-time target heating power of the heating element according to the obtained power grid voltage and the current temperature, and controlling the heating element to heat according to the target heating power through the power control device so as to realize dynamic control of the heating power of the heating element.

In one implementation manner, the step of determining the real-time target heating power of the heating element according to the obtained grid voltage and the current temperature includes:

calculating the maximum heating power of the heating body according to the fixed value and the obtained power grid voltage;

and obtaining the real-time target heating power of the heating body under the power grid voltage and the current temperature according to the corresponding relation of the pre-stored coefficient multiplied by the maximum heating power and each temperature under the power grid voltage, wherein the coefficient range is 0 to 1.

In one implementation manner, the electric water boiler supports at least two power grid voltages, and the microcontroller prestores a corresponding relationship between each temperature under each power grid voltage and a coefficient multiplied by the corresponding maximum heating power, wherein the maximum heating powers corresponding to the heating elements under different power grid voltages are different.

In one implementation, the maximum heating power Pmax of the heating element at each grid voltage is (U ═ c²and/R), wherein U is the current power grid voltage, R is the resistance value of the heating resistor, and 80 omega is larger than or equal to R and larger than or equal to 40 omega.

In one implementation, the correspondence relationship between each temperature and a coefficient multiplied by the corresponding maximum heating power for each grid voltage pre-stored in the microcontroller includes:

when the temperature is less than the first threshold value, the multiplying coefficient of the corresponding maximum heating power is 1;

when the temperature is greater than the second threshold value, the coefficient multiplied by the corresponding maximum heating power is 0;

when the temperature is between the first threshold value and the second threshold value, the coefficient multiplied by the corresponding maximum heating power is more than 0 and less than 1;

wherein the first threshold is less than the second threshold.

An electric water boiling cup, the capacity of which is less than or equal to 500ml, comprises a power grid detection circuit, a temperature sensor, a heating body, a power control device and a microcontroller, wherein the power grid detection circuit, the temperature sensor, the heating body, the power control device and the microcontroller are integrated on a circuit board, and the integrated whole width is less than 7cm and the height is less than 2.5 cm;

the power grid detection circuit is used for obtaining the power grid voltage of the electric water boiling cup in the working state and transmitting the power grid voltage to the microcontroller;

the temperature sensor is used for acquiring the current temperature of the power control device in real time and transmitting the current temperature to the microcontroller;

the microcontroller is used for obtaining the power grid voltage transmitted by the power grid detection circuit and the current temperature obtained by the temperature sensor in real time, determining the real-time target heating power of the heating element according to the obtained power grid voltage and the current temperature, and controlling the heating element to heat according to the target heating power through the power control device so as to realize dynamic control of the heating power of the heating element.

In one implementation manner, the heating element includes a heating resistor, the resistance of the heating resistor is a fixed value, the microcontroller is configured to calculate the maximum heating power of the heating element according to the fixed value and the obtained grid voltage, and obtain the real-time target heating power of the heating element at the grid voltage and the current temperature according to a pre-stored correspondence between each temperature under the grid voltage and a coefficient multiplied by the maximum heating power, where the coefficient range is 0 to 1.

In one implementation, the power control device includes a thyristor and a zero-crossing detection circuit, the thyristor being adjacent to the temperature sensor.

In one implementation manner, the electric water boiler supports at least two power grid voltages, and the microcontroller prestores a corresponding relationship between each temperature and a coefficient multiplied by a corresponding maximum heating power under each power grid voltage, where the maximum heating powers corresponding to the heating element under different power grid voltages are different, and the maximum heating power Pmax corresponding to the heating element under each power grid voltage is (U ═ v-²and/R), wherein U is the current power grid voltage, R is the resistance value of the heating resistor, and 80 omega is larger than or equal to R and larger than or equal to 40 omega.

In one implementation, the correspondence relationship between each temperature and a coefficient multiplied by the corresponding maximum heating power for each grid voltage pre-stored in the microcontroller includes:

when the temperature is less than the first threshold value, the multiplying coefficient of the corresponding maximum heating power is 1;

when the temperature is greater than the second threshold value, the coefficient multiplied by the corresponding maximum heating power is 0;

when the temperature is between the first threshold value and the second threshold value, the coefficient multiplied by the corresponding maximum heating power is more than 0 and less than 1;

wherein the first threshold is less than the second threshold.

According to the power control method and the electric water boiling cup, the power grid voltage of the working state of the electric water boiling cup is obtained, the current temperature of the power control device is obtained in real time, and the dynamic determination and control of the heating power of the heating body are achieved by combining the obtained power grid voltage and the current temperature, so that heating can be rapidly and reliably achieved under various power grid voltages, and the heating speed is guaranteed.

In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

To more clearly illustrate the technical solutions of the present disclosure, the drawings needed for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present disclosure, and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a circuit block diagram of an electric water boiling cup provided by the present disclosure.

Fig. 2 is a schematic flow chart of a power control method provided by the present disclosure.

Icon: 1-a heating element; 2-a power control device; 3-a microcontroller; 4-a grid detection circuit; 5-temperature sensor.

Detailed Description

The technical solutions in the present disclosure will be described clearly and completely with reference to the accompanying drawings in the present disclosure, and it is to be understood that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The components of the present disclosure, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present disclosure, presented in the figures, is not intended to limit the scope of the claimed disclosure, but is merely representative of selected embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the disclosure without making creative efforts, shall fall within the protection scope of the disclosure.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined in subsequent figures.

In view of the fact that people have portable requirements on electric water boiling cups in many scenes, in order to meet the requirements, the electric water boiling cups need to be designed to be small and portable, the space for accommodating the circuit board integrated with each functional device in the small and portable electric water boiling cups is very compact, and the heat dissipation space of the circuit board is very limited. In a limited heat dissipation space, the heating power of the portable electric water boiling cup is limited in order to avoid overheating failure of the power device.

The mainstream portable electric water heating cups in the market at present are mostly heated by adopting fixed heating power under each power grid voltage, and the corresponding fixed heating power of the same electric water heating cup under different power grid voltages is different (the larger the power grid voltage is, the larger the corresponding fixed heating power is). In order to avoid overheating and invalidation of power devices in the electric water boiling cup, fixed heating power corresponding to the maximum power grid voltage supported by the electric water boiling cup is mostly adopted as the maximum heating power of the electric water boiling cup. The maximum heating power is limited, so that the heating speed of the electric water boiling cup is limited, the fixed heating power corresponding to the electric water boiling cup under the lower power grid voltage is lower, the heating speed is slower, and the fixed heating power corresponding to the lower power grid voltage does not reach the power which can cause the overheating failure of a power device in the electric water boiling cup. For example, suppose that the maximum grid voltage supported by a certain electric water boiler is 220V, and the fixed heating power corresponding to the maximum grid voltage is 300W (i.e. the maximum heating power of the electric water boiler without thermal failure is 300W). Since the heating power of the electric water boiling cup is positively correlated to the grid voltage, the fixed heating power of the electric water boiling cup is less than 300W, for example, 75W, under the grid voltage of less than 220V, for example, 110V, as known to those skilled in the art, the heating speed is very slow when the electric water boiling cup is heated with the heating power of 75W, and the heating power of 75W is far from reaching the power that would cause the overheating failure of the power device in the electric water boiling cup. Therefore, the hardware performance of the portable electric water boiling cup with the limited heat dissipation space is greatly wasted, the heating speed is required to be improved, the user experience is influenced, and the application prospect of the electric water boiling cup is reduced.

In view of the above, the present disclosure provides a power control method and an electric water boiling cup, which abandon the implementation scheme that the electric water boiling cup in the prior art is heated by using a fixed heating power under the same power grid voltage, and is limited by heat dissipation, and the heating power and the heating speed are limited, and innovatively combine temperature to realize dynamic control of the heating power of the electric water boiling cup, so that the electric water boiling cup is ensured not to be thermally disabled in a limited heat dissipation space, and is also ensured to be "adaptive" to heat with the optimal heating power, thereby significantly improving the heating speed of the portable electric water boiling cup with a limited heat dissipation space, further improving the user experience, and ensuring the application prospect of the electric water boiling cup.

The small and medium-sized portable electric water boiling cup with limited heat dissipation space mainly refers to an electric water boiling cup with the capacity of not more than 500ml, including the capacities of 450ml, 400ml, 380ml, 350ml, 300ml, 200ml and the like, wherein the whole width of a circuit board integrated with all functional devices is less than 7cm, including the electric water boiling cups with the widths of 6.8cm, 6.5cm, 6cm, 5.6cm, 5cm, 4cm and the like, and the height of less than 2.5cm, including the heights of 2.4cm, 2cm, 1.7cm, 1.5cm, 1cm and the like. The electric water boiling cup is small in capacity, the whole volume of a circuit board integrating all functional devices is small, the whole volume of the designed electric water boiling cup is small, the heat dissipation space of a power device is limited, the power device is easy to overheat and lose efficacy due to insufficient heat dissipation, and heating power needs to be controlled in order to ensure heating reliability.

The cross section of the electric water boiling cup in the disclosure can be in various shapes, such as circle, ellipse, rectangle, square, triangle, etc. The shape of the circuit board can be matched with the cross section of the electric water boiling cup, correspondingly, the height of the circuit board can be the maximum height after all functional devices are integrated, the width of the circuit board can be the maximum length of the circuit board, and for example, when the circuit board is circular, the width of the circuit board can be the diameter.

Referring to fig. 1, in the present disclosure, each functional device of the electric water-boiling cup integrated on the circuit board includes a heating element 1, a power control device 2, a microcontroller 3, a power grid detection circuit 4 and a temperature sensor 5.

The power grid detection circuit 4 is used for obtaining the power grid voltage of the working state of the electric water boiling cup and transmitting the power grid voltage to the microcontroller 3. The temperature sensor 5 is used to obtain the current temperature of the power control device 2 in real time and transmit it to the microcontroller 3. The microcontroller 3 is used for obtaining the power grid voltage transmitted by the power grid detection circuit 4 and the current temperature obtained by the temperature sensor 5 in real time, determining the real-time target heating power of the heating element 1 according to the obtained power grid voltage and the current temperature, and controlling the heating element 1 to heat according to the target heating power through the power control device 2, so as to realize the dynamic control of the heating power of the heating element 1.

It can be understood that, compared with the implementation scheme that the electric water boiling cup in the prior art is heated by adopting fixed heating power under the same power grid voltage, the maximum heating power of the electric water boiling cup under each power grid voltage can be multiplied by adopting the implementation scheme that the heating power of the electric water boiling cup is dynamically controlled by combining the temperature in the present disclosure.

For example, assuming that the maximum grid voltage supported by a certain electric water boiler is 220V, in order to ensure that the electric water boiler does not fail thermally when heated with a fixed heating power in the prior art, the maximum heating power is set to be 300W. By adopting the scheme in the disclosure, as the heating power of the electric water heating cup is dynamically controlled by combining the temperature, under the power grid voltage of 220V, the maximum heating power can be set to be far larger than 300W, such as 700W, 750W, 800W, 850W, 900W and the like, based on the setting, when the detected temperature is lower, the maximum heating power far larger than 300W can be adopted for rapid heating, and the heating power is adaptively reduced after the temperature is raised, so that the thermal failure can be avoided while the electric water heating cup is rapidly heated with the optimal heating power.

Similarly, whereas the fixed heating power of the electric water boiling cup is positively correlated to the current grid voltage by using the prior art solution, the maximum heating power of the electric water boiling cup is equal to 300W when the grid voltage is 220V, and correspondingly, by using the prior art solution, the heating power of the electric water boiling cup is less than 300W when the grid voltage is 110V, if only 75W is possible, and those skilled in the art can know that the heating speed is very slow by using 75W heating power for heating. In contrast, according to the scheme in the disclosure, the maximum heating power of the electric water boiling cup is much greater than 300W, such as 800W if possible, and accordingly, the heating power of the electric water boiling cup when the grid voltage is 110V is also much greater than 75W, such as 200W if possible, and those skilled in the art can know that the heating speed is much higher than that of the heating power of 75W for heating, and the use experience of the electric water boiling cup can be significantly improved.

In the present disclosure, the heating element 1 may include a heating resistor, the resistance value of the heating resistor is a fixed value, and the microcontroller 3 is configured to calculate the maximum heating power of the heating element 1 according to the fixed value and the obtained grid voltage. The maximum heating power Pmax of the heating element 1 under each grid voltage is equal to (U)²and/R), wherein U is the current grid voltage, R is the resistance value of the heating resistor, and 80 omega is larger than or equal to R and larger than or equal to 40 omega, for example, R can be equal to 75 omega, 70 omega, 67 omega, 65 omega, 60 omega, 58 omega, 55 omega and the like. According to the formula, in the present disclosure, the maximum heating power corresponding to each grid voltage is positively correlated to the magnitude of the grid voltage. Since the heating power of the electric water heating cup is dynamically controlled by combining the temperature in the present disclosure, the corresponding maximum heating power under each power grid voltage is far larger than the maximum heating power under the power grid voltage in the prior art, and therefore, the resistance value of the heating resistor in the present disclosure is smaller than that of the heating resistor in the prior art. For example, the resistance of the heating resistor in the electric heating cup with a capacity of 450ml in the prior art is generally about 160 Ω, while the resistance of the heating resistor in the scheme of the disclosure can be about 60 Ω, which is far away from the current valueIs smaller than the resistance value of the heating resistor in the electric heating cup in the prior art.

In the disclosure, in the process of dynamically controlling the heating power of the heating element 1, the real-time heating power is inversely related to the temperature, and the microcontroller 3 may pre-store the corresponding relationship between each temperature under each power grid voltage and the coefficient multiplied by the maximum heating power under the power grid voltage, so as to obtain the real-time target heating power under the current temperature, wherein the coefficient range is 0 to 1, and the corresponding maximum heating powers of the heating element 1 under different power grid voltages are different. For example, with the solution in the present disclosure, if the maximum heating power of the electric water boiling cup is Pmax under a certain power grid voltage, the corresponding relationship between each temperature and the coefficient multiplied by the maximum heating power may include: when the temperature is less than the first threshold value, the multiplying coefficient of the corresponding maximum heating power is 1; when the temperature is greater than the second threshold value, the coefficient multiplied by the corresponding maximum heating power is 0; when the temperature is between the first threshold value and the second threshold value, the coefficient multiplied by the corresponding maximum heating power is more than 0 and less than 1; wherein the first threshold is less than the second threshold. Based on the coefficient setting, when the temperature is low (less than the first threshold), the electric water boiling cup can be heated by the maximum heating power under the current power grid voltage, and the heating speed is ensured to the maximum extent. When the temperature is higher (greater than the second threshold), the electric water boiling cup can stop heating, so that thermal failure is avoided, and the use reliability of the electric water boiling cup is ensured. When the temperature is moderate (between a first threshold and a second threshold), the electric water boiling cup can perform adaptive heating with the heating power which is less than the maximum heating power under the current power grid voltage and greater than zero, and the balance between the heating speed and the working reliability is realized.

In the present disclosure, each functional device can be selected in various ways, and can be flexibly assembled from the existing devices on the market according to actual requirements. For example, the power control device 2 may include a thyristor and a zero-cross detection circuit, and accordingly, the thyristor and the temperature sensor 5 may be located at adjacent positions on the circuit board in order to improve the accuracy of temperature detection.

Referring to fig. 2, the present disclosure further provides a power control method for the electric water boiling cup, which includes the following steps executed by the microcontroller 3:

s10, obtaining the power grid voltage of the electric water boiling cup in the working state;

wherein, the electric water boiling cup can support at least two kinds of power grid voltages. Illustratively, a global voltage may be supported, e.g., 100V, 110V, 220V, 240V, etc. may be supported. The grid voltage of the working state of the electric water boiling cup can be obtained by calculation, for example, if the grid voltage U calculated by the grid detection circuit 4 is greater than 198V when the electric water boiling cup is working, it can be determined that the grid voltage of the current use scene is 220V or 240V. If the calculated grid voltage U is less than 120V, it can be determined that the current usage scenario is 100V or 110V at the grid voltage.

S20, acquiring the current temperature of the power control device 2 in real time;

and S30, determining the real-time target heating power of the heating element 1 according to the obtained power grid voltage and the current temperature, and controlling the heating element 1 to heat according to the target heating power through the power control device 2 so as to realize the dynamic control of the heating power of the heating element 1.

The method comprises the following steps that the heating body 1 comprises a heating resistor, the resistance value of the heating resistor is a fixed value, and the real-time target heating power of the heating body 1 is determined according to the obtained power grid voltage and the current temperature, and comprises the following steps: calculating the maximum heating power of the heating body 1 according to the fixed value and the obtained power grid voltage; and obtaining the real-time target heating power of the heating body 1 under the power grid voltage and the current temperature according to the corresponding relation of the coefficient multiplied by the maximum heating power and each temperature under the pre-stored power grid voltage, wherein the coefficient range is 0 to 1.

The microcontroller 3 prestores the corresponding relationship between each temperature and the coefficient multiplied by the corresponding maximum heating power under each power grid voltage, wherein the maximum heating power of the heating body 1 is different under different power grid voltages.

The number of the corresponding relations of the multiplied coefficients of the maximum heating power and the temperatures of each kind of grid voltage prestored in the microcontroller 3 may be the same or different, and correspondingly, the power variation gradients of different grid voltages at each temperature may be the same or different. For example, since the maximum heating power is the largest and the heating is faster as the grid voltage is larger, the number of the corresponding relations between the respective temperatures set in the microcontroller 3 and the coefficients by which the maximum heating power is multiplied may be the largest, so as to realize more flexible and rapid heating power changes.

The maximum heating power Pmax of the heating element 1 under each grid voltage is equal to (U)²and/R), wherein U is the current power grid voltage, R is the resistance value of the heating resistor, and 80 omega is larger than or equal to R and larger than or equal to 40 omega.

The correspondence relationship between each temperature and the coefficient multiplied by the corresponding maximum heating power for each grid voltage prestored in the microcontroller 3 includes: when the temperature is less than the first threshold value, the multiplying coefficient of the corresponding maximum heating power is 1; when the temperature is greater than the second threshold value, the coefficient multiplied by the corresponding maximum heating power is 0; when the temperature is between the first threshold value and the second threshold value, the coefficient multiplied by the corresponding maximum heating power is more than 0 and less than 1; wherein the first threshold is less than the second threshold.

The temperature thresholds corresponding to different grid voltages may be the same or different. For example, in view of the fact that the higher the grid voltage, the higher the maximum heating power, the faster the power control device 2 generates heat, the set temperature threshold may be relatively smaller, the lower the grid voltage, the lower the maximum heating power, and the slower the power control device 2 generates heat, and the set temperature threshold may be relatively larger, thereby ensuring the heating speed while ensuring the operational reliability. For example, when the grid voltage is 220V or more, the first threshold may be set to about 85 degrees, and the second threshold may be set to about 110 degrees. When the temperature is between 85 degrees and 110 degrees, the coefficients may be two or more, for example, when the temperature is greater than 85 degrees and less than 95 degrees, the coefficient may be 0.75, and when the temperature is greater than 95 degrees and less than 110 degrees, the coefficient may be 0.5. For example, when the grid voltage is 120V or less, the first threshold may be set to about 95 degrees, and the second threshold may be set to about 110 degrees. The coefficient may be set to be two or less when the temperature is between 95 degrees and 110 degrees, and may be 0.8 when the temperature is greater than 95 degrees and less than 110 degrees. It will be appreciated that after stopping heating, it is also possible to continue to detect the temperature and resume heating when the temperature is less than a third threshold, which is greater than the first threshold and less than the second threshold, for example, the second threshold may be 100 degrees in the above example. Based on the above design, the thermal balance of the power control device 2 is realized, and overheating failure is avoided.

It should be noted that, each numerical value in the present disclosure is not limited to an absolute numerical value, and each numerical value may refer to a numerical value having a certain fluctuation, for example, the coefficient value, each grid voltage, and the like may fluctuate, for example, the coefficient 1 may fluctuate by 0.1, and the grid voltage may fluctuate by several V. The exemplifications set out herein illustrate embodiments of the disclosure, and such exemplifications are not to be construed as limiting the disclosure in any manner.

The implementation principle of the method embodiment in the disclosure is similar to that of the electric water boiling cup embodiment, the implementation principles of the embodiments can be referred to each other, and the corresponding contents are not repeated in the respective embodiments.

The power control method and the electric water boiling cup can quickly and reliably realize heating under various power grid voltages.

The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.