A silent water boiling method and device using a buzzer and a thermal sensor

Abstract

The present invention relates to the field of kettles, and specifically discloses a silent water boiling method and device using a buzzer and a thermosensitive device. The method comprises responding to a water boiling instruction, heating the kettle body with a first power value as the heating power, and synchronously or after a first preset time delay, starting to measure the temperature value T1 and vibration value Z1 of the kettle body; detecting in real time whether the temperature value T1 is greater than or equal to the boiling point temperature value, and if so, terminating the heating of the kettle body; otherwise, adjusting the heating power based on the current vibration value Z1, the heating power, and adjustment logic 1. The present invention measures the vibration value of the kettle body in real time and adjusts the heating power based on the vibration value, thereby suppressing the maximum noise during the water boiling process while maintaining the maximum efficiency of heating the kettle body.

Description

Technical Field

[0001] The invention relates to the field of kettles, and in particular to a silent water boiling method and equipment using a buzzer and a thermosensitive element. Background Art

[0002] Kettles are the most common equipment in modern production and life, and appear in every corner of people's daily lives, such as water dispensers in offices, electric kettles and electric tea sets in homes, all of which provide hot water by heating the water in the kettle.

[0003] However, the actual boiling process typically generates a significant amount of noise, impacting people's living and working environments. The noise is generated by two factors: first, as water is heated to boiling, convection currents at the bottom of the water gradually increase, reach a peak, and then gradually decrease. This is particularly true in kettles, where intense convection generates noise, and the intensity of the noise is proportional to the strength of the convection currents. Second, during the heating process, water vaporizes from the bottom of the water, contacting the heating surface, and produces bubbles. When these bubbles rise to the surface and burst, they vibrate, emitting a pattern of sound waves. The frequency and intensity of these sound waves are correlated with the water temperature and the heating power. Typically, the peak noise level during water heating occurs at around 75°C, with the highest noise levels occurring between 60°C and 90°C.

[0004] To mitigate the effects of this noise, common kettles on the market typically use sound-insulating materials or housings with sound-isolating designs. However, this approach is costly and inapplicable to appliances like electric kettles and tea sets. Alternatively, lower heating power is employed to achieve a smoother boiling process, thereby reducing noise. However, this approach is inefficient and wastes energy. Summary of the Invention

[0005] In order to overcome the problem that existing water boiling equipment and methods are difficult to suppress the noise generated during the water boiling process while ensuring the water boiling efficiency, the present invention provides a silent water boiling method and equipment using a buzzer and a thermal sensor.

[0006] The present invention provides a silent water boiling method using a buzzer and a heat sensor, which is applied to a kettle body and includes the following steps:

[0007] In response to a water boiling instruction, the kettle body is heated with a first power value as a heating power, and after a first preset time is synchronized or delayed, a temperature value T1 and a vibration value Z1 of the kettle body are measured; wherein the first preset time is a preset time value, and the first power value is a preset power value;

[0008] Real-time detection of whether the temperature value T1 is greater than or equal to the boiling point temperature value; if so, then the heating of the kettle body is terminated; otherwise, the heating power is adjusted according to the current vibration value Z1, the heating power and the adjustment logic 1;

[0009] The boiling point temperature is the temperature T1 when the water in the kettle is fully boiling.

[0010] The adjustment logic 1 is specifically as follows:

[0011] If the current vibration value Z1 and heating power meet condition 1, reduce the heating power;

[0012] If the current vibration value Z1 and heating power meet condition 2, increase the heating power;

[0013] If the current vibration value Z1 and heating power do not meet either condition 1 or condition 2, the heating power remains unchanged;

[0014] The first condition is that the current vibration value Z1 is greater than or equal to the maximum vibration threshold. And the current heating power is greater than or equal to the minimum power threshold; the second condition is that the current vibration value Z1 is less than the maximum vibration threshold, and the current heating power is less than the maximum power threshold; the maximum vibration threshold is a preset vibration value, and the minimum power threshold and the maximum power threshold are both preset power values.

[0015] Preferably, the first preset time is 2 seconds, the maximum vibration threshold is the vibration value Z1 corresponding to when the sound generated by the kettle body during the heating process reaches 45dB, the minimum power threshold is the minimum heating power required to maintain the temperature value T1 from decreasing, the maximum power threshold is the upper limit of the power for heating the kettle body, and the first power value is the maximum power threshold.

[0016] Preferably, the second condition is that the current vibration value Z1 is less than the vibration hysteresis value, and the current heating power is less than the maximum power threshold; wherein, the vibration hysteresis value is a preset vibration value, and the vibration hysteresis value is less than the maximum vibration threshold.

[0017] Preferably, the heating power is adjusted according to the current vibration value Z1, the heating power and the adjustment logic 1, specifically as follows:

[0018] The vibration value Z1 and the heating power are used as a positive feedback closed-loop control system, and the PID control parameters of the closed-loop control system are measured and calculated;

[0019] The maximum vibration threshold is used as the steady-state target of the vibration value Z1, and the heating power is adjusted within the range from the lowest power threshold to the highest power threshold using the PID control method.

[0020] Preferably, a vibration sensor for measuring the vibration value of the kettle body is provided on the outer side of the kettle body, a signal amplifying circuit is provided on one side of the vibration sensor, and the vibration sensor is electrically connected to the signal amplifying circuit;

[0021] The step of measuring the temperature value T1 and the vibration value Z1 of the kettle body includes the following steps:

[0022] The vibration sensor signal amplified by the signal amplification circuit is filtered and analog-to-digital converted using a low-pass filtering algorithm to obtain a vibration value Z1.

[0023] Preferably, a heating component, a kettle bottom NTC and an infrared temperature sensor are provided on the outside of the kettle body; the heating component abuts against the bottom surface of the kettle body, the kettle bottom NTC is fixedly connected to the bottom surface of the kettle body, and the infrared temperature sensor faces the bottom surface of the kettle body;

[0024] The step of measuring the temperature value T1 and the vibration value Z1 of the kettle body includes the following steps:

[0025] The temperature value T2 is obtained through the NTC at the bottom of the pot, and the temperature value T3 is obtained through the infrared temperature sensor;

[0026] The average value of the current temperature value T2 and the temperature value T3 is output as the current temperature value T1.

[0027] Preferably, the heating component is provided with a heat plate NTC, and the heat plate NTC is fixedly connected to the outer surface of the heating component;

[0028] The step of measuring the temperature value T1 and the vibration value Z1 of the kettle body includes the following steps:

[0029] Obtain temperature value T4 through hot plate NTC;

[0030] When it is detected that the difference between the temperature value T4 and the temperature value T1 is greater than 10° C., an alarm signal is issued and the heating of the kettle body is stopped.

[0031] The present invention also provides a silent water-boiling device using a buzzer and a thermosensitive device, comprising: a kettle body for holding water, and a heating assembly, a control circuit, a temperature sensor, and a vibration sensor, each of which is disposed on the outer side of the bottom of the kettle body, wherein the bottom of the kettle body abuts against the upper surface of the heating assembly;

[0032] The heating component, temperature sensor and vibration sensor are electrically connected to the control circuit respectively. After power-on, the control circuit executes the above-mentioned silent water boiling method using a buzzer and a thermal sensor.

[0033] Preferably, the device comprises a base, wherein the control circuit, the temperature sensor and the vibration sensor are all arranged in the base, and the heating component is arranged on the upper surface of the base;

[0034] The kettle body and the base are designed to be detachable, and the bottom surface of the kettle body is placed on the upper surface of the heating component.

[0035] Preferably, the vibration sensor is a buzzer, and the output end of the buzzer is provided with a signal amplifying circuit, and the signal amplifying circuit is electrically connected to the control circuit;

[0036] The temperature sensor includes a kettle bottom NTC, an infrared temperature sensor and a hot plate NTC; the kettle bottom NTC is closely attached to the bottom of the kettle body, the infrared temperature sensor faces the bottom of the kettle body, and the hot plate NTC is closely attached to the outer surface of the heating component.

[0037] The beneficial effects of the present invention are:

[0038] By measuring the vibration value of the kettle body in real time and adjusting the heating power according to the vibration value, the kettle body can be heated at the highest efficiency while suppressing the maximum noise during the boiling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be further described below with reference to the accompanying drawings, in which:

[0040] Figure 1 This is a flow chart of a method according to embodiment 1 of the present invention;

[0041] Figure 2 This is a structural diagram of embodiment 2 of the present invention;

[0042] Figure 3 This is an exploded view of the base structure of the second embodiment of the present invention;

[0043] In the figure: 1. Kettle body; 2. Base; 3. Control circuit; 4. Vibration sensor; 5. NTC on the bottom of the kettle; 6. Infrared temperature sensor; 7. NTC on the hot plate; 8. Heating component; 9. Hot plate bracket. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0045] See also Figure 1As a first embodiment of the present invention, a silent water boiling method using a buzzer and a thermosensitive device is disclosed, which is applied to a kettle body 1 and includes the following steps:

[0046] S1. Start heating: In response to a water boiling instruction, heat the kettle body 1 with a first power value as the heating power, and start measuring the temperature value T1 and the vibration value Z1 of the kettle body 1 synchronously or after a first preset time delay;

[0047] S2, adaptive water boiling: real-time detection of whether the temperature value T1 is greater than or equal to the boiling point temperature value; if so, then end heating of the kettle body 1; otherwise, adjust the heating power according to the current vibration value Z1, heating power and adjustment logic 1.

[0048] The first preset time is a preset time value, the first power value is a preset power value, and the boiling point temperature value is the temperature value T1 when the water in the kettle body 1 is fully boiled.

[0049] The adjustment logic 1 is specifically as follows:

[0050] If the current vibration value Z1 and heating power meet the conditions, the heating power will be temporarily reduced;

[0051] If the current vibration value Z1 and heating power meet condition 2, increase the heating power;

[0052] If the current vibration value Z1 and heating power do not meet either condition 1 or condition 2, the heating power remains unchanged;

[0053] Among them, the first condition is that the current vibration value Z1 is greater than or equal to the maximum vibration threshold, and the current heating power is greater than or equal to the minimum power threshold; the second condition is that the current vibration value Z1 is less than the maximum vibration threshold, and the current heating power is less than the maximum power threshold.

[0054] The first preset time of this embodiment is 2 seconds, the maximum vibration threshold is the vibration value Z1 corresponding to when the sound generated by the kettle body 1 reaches 45dB during the heating process, the minimum power threshold is the minimum heating power required to maintain the temperature value T1 from decreasing, the maximum power threshold is the upper limit value of the power for heating the kettle body 1, and the first power value is the maximum power threshold.

[0055] Preferably, this embodiment adopts PID control to adjust the heating power. By controlling the rise and fall of the heating power in a PID manner, fluctuations in the heating power are reduced, noise changes and heating power changes are made smoother, and the impact of external noise interference on the water heating power is reduced. The specific implementation steps are as follows:

[0056] S21, using the vibration value Z1 and the heating power as a positive feedback closed-loop control system, measuring and calculating the PID control parameters of the closed-loop control system;

[0057] S22 , using the maximum vibration threshold as a steady-state target for the vibration value Z1 , and using a PID control method to adjust the heating power within a range from the lowest power threshold to the highest power threshold.

[0058] The measurement and calculation of the PID control parameters are based on the relationship between the vibration value Z1 and the heating power measured during the actual water boiling process.

[0059] The principle of this embodiment is: since the sound generated when boiling water can be measured using the reading of the vibration sensor 4, when the sound is detected to be greater than 45dB during the boiling process, the heating power is reduced until it is reduced to the lowest power that can keep the water temperature rising; when the sound is less than 45dB, the heating power is increased until it reaches the maximum power.

[0060] By measuring the vibration value of the kettle body 1 in real time and adjusting the heating power according to the vibration value, the kettle body 1 can be heated at the maximum efficiency while suppressing the maximum noise during the boiling water process, thereby achieving a silent boiling water process.

[0061] See also Figure 2 and Figure 3 As a second embodiment of the present invention, a silent water-boiling device using a buzzer and a thermosensitive device is specifically disclosed, comprising: a kettle body 1 for holding water, a base 2, and a heating component 8, a control circuit 3, a temperature sensor, and a vibration sensor 4, respectively disposed in the base 2. The heating component 8 is disposed on the upper surface of the base 2; the bottom of the kettle body 1 abuts against the upper surface of the heating component 8;

[0062] The heating component 8, temperature sensor and vibration sensor 4 are electrically connected to the control circuit 3 respectively. After being powered on, the control circuit 3 executes the silent water boiling method using a buzzer and a thermal sensor as described in the first embodiment.

[0063] The kettle body 1 and the base 2 are designed to be detachable, and the bottom surface of the kettle body 1 is placed on the upper surface of the heating component 8.

[0064] The vibration sensor 4 of this embodiment is a buzzer, and a signal amplification circuit is provided on one side of the buzzer, and the signal amplification circuit is electrically connected to the control circuit 3. In other embodiments, the vibration sensor 4 can also be a microphone or a mechanical, optical, capacitive, or inductive vibration sensor component, as long as it can measure the vibration value of the kettle body.

[0065] The temperature sensor includes a kettle bottom NTC5, an infrared temperature sensor 6 and a hot plate NTC7; the kettle bottom NTC5 is close to the bottom of the kettle body 1, the infrared temperature sensor 6 is facing the bottom of the kettle body 1, and the hot plate NTC7 is close to the outer surface of the heating component 8.

[0066] The adjustment logic 1 of this embodiment is specifically as follows:

[0067] If the current vibration value Z1 is greater than or equal to the maximum vibration threshold, and the current heating power is greater than or equal to the minimum power threshold, reduce the heating power;

[0068] If the current vibration value Z1 is less than or equal to the vibration return difference value, and the current heating power is less than the maximum power threshold, increase the heating power;

[0069] If the current vibration value Z1 and heating power do not meet the above two conditions, the heating power remains unchanged;

[0070] The vibration hysteresis difference value is a preset vibration value, and the vibration hysteresis difference value is smaller than a maximum vibration threshold.

[0071] By increasing the vibration return difference, the robustness of the system is improved, the frequent increase and decrease of heating power is reduced, and at the same time, the impact of external noise interference on water heating power is reduced.

[0072] In step S1 of this embodiment, the temperature value T1 and the vibration value Z1 of the kettle body 1 are measured, and the specific steps for implementation are as follows:

[0073] A1, obtain the temperature value T2 through the kettle bottom NTC5, obtain the temperature value T3 through the infrared temperature sensor 6, filter and convert the vibration sensor 4 signal amplified by the signal amplifier circuit through a low-pass filter algorithm to obtain the vibration value Z1, and obtain the temperature value T4 through the hot plate NTC7;

[0074] A2, output the average value of the current temperature value T2 and the temperature value T3 as the current temperature value T1;

[0075] A3. When it is detected that the difference between the temperature value T4 and the temperature value T1 is greater than 10° C., an alarm signal is issued and the heating of the kettle body 1 is stopped.

[0076] The first preset time of this embodiment can be understood as the time interval from the start of heating the kettle body 1 to the inevitable occurrence of a vibration value in the kettle body 1 under any temperature and water volume conditions. During this interval, there is no need to measure the vibration value Z1 of the kettle body 1.

[0077] Since the time from the start of heating the kettle body 1 to the occurrence of vibration value on the kettle body 1 is the shortest at the temperature value T1 corresponding to the stage with the loudest noise during the boiling process, the first preset time in this embodiment is obtained by actual measurement. The method for accurately measuring the first preset time includes the following steps:

[0078] B1. Responding to a water-boiling instruction, heating the kettle body 1 containing water at room temperature using a first power value as heating power, and simultaneously measuring a temperature value T1 and a vibration value Z1 of the kettle body 1;

[0079] B2. When the temperature value T1 is greater than or equal to the boiling point for the first time, the maximum value of all vibration values ​​Z1 up to the current time is taken as the maximum vibration value, and the temperature value T1 at the time when the maximum vibration value occurs is taken as the temperature value a;

[0080] B3, responding to the water boiling instruction, heating the kettle body 1 containing water at a temperature value a with a first power value as the heating power, and simultaneously measuring the vibration value Z1 of the kettle body 1;

[0081] B4. When the vibration value Z1 is greater than the vibration lower limit threshold, the time interval from the start of heating to the current time is used as the first preset time.

Claims

1. A silent water boiling method using a buzzer and a thermal sensor, applied to a kettle, characterized in that: The steps are as follows: In response to a water boiling instruction, the kettle body is heated with a first power value as a heating power, and after a first preset time is synchronized or delayed, a temperature value T1 and a vibration value Z1 of the kettle body are measured; wherein the first preset time is a preset time value, and the first power value is a preset power value; Real-time detection of whether the temperature value T1 is greater than or equal to the boiling point temperature value; if so, then the heating of the kettle body is terminated; otherwise, the heating power is adjusted according to the current vibration value Z1, the heating power and the adjustment logic 1; The boiling point temperature is the temperature T1 when the water in the kettle is fully boiling. The adjustment logic 1 is specifically as follows: If the current vibration value Z1 and heating power meet condition 1, reduce the heating power; If the current vibration value Z1 and heating power meet condition 2, increase the heating power; If the current vibration value Z1 and heating power do not meet either condition 1 or condition 2, the heating power remains unchanged; Among them, the first condition is that the current vibration value Z1 is greater than or equal to the maximum vibration threshold, and the current heating power is greater than or equal to the minimum power threshold; the second condition is that the current vibration value Z1 is less than the maximum vibration threshold, and the current heating power is less than the maximum power threshold; the maximum vibration threshold is a preset vibration value, and the minimum power threshold and the maximum power threshold are both preset power values.

2. A silent water boiling method using a buzzer and a thermosensitive device according to claim 1, characterized in that: The first preset time is 2 seconds, the maximum vibration threshold is the vibration value Z1 corresponding to when the sound generated by the kettle body reaches 45dB during the heating process, the minimum power threshold is the minimum heating power required to maintain the temperature value T1 from dropping, the maximum power threshold is the upper limit of the power for heating the kettle body, and the first power value is the maximum power threshold.

3. A silent water boiling method using a buzzer and a thermosensitive device according to claim 1, characterized in that: The second condition is that the current vibration value Z1 is less than the vibration hysteresis value, and the current heating power is less than the maximum power threshold; wherein the vibration hysteresis value is a preset vibration value, and the vibration hysteresis value is less than the maximum vibration threshold.

4. A silent water boiling method using a buzzer and a thermosensitive device according to claim 1, characterized in that: The heating power is adjusted according to the current vibration value Z1, the heating power and the adjustment logic 1, specifically: The vibration value Z1 and the heating power are used as a positive feedback closed-loop control system, and the PID control parameters of the closed-loop control system are measured and calculated; The maximum vibration threshold is used as the steady-state target of the vibration value Z1, and the heating power is adjusted within the range from the lowest power threshold to the highest power threshold using a PID control method.

5. The silent water boiling method using a buzzer and a thermosensitive device according to claim 1, characterized in that: A vibration sensor for measuring the vibration value of the kettle body is provided on the outside of the kettle body, and a signal amplification circuit is provided on one side of the vibration sensor, and the vibration sensor is electrically connected to the signal amplification circuit; The step of measuring the temperature value T1 and the vibration value Z1 of the kettle body includes the following steps: The vibration sensor signal amplified by the signal amplification circuit is filtered and analog-to-digital converted using a low-pass filtering algorithm to obtain a vibration value Z1.

6. A silent water boiling method using a buzzer and a thermosensitive device according to claim 1, characterized in that: The outside of the kettle body is provided with a heating component, a kettle bottom NTC and an infrared temperature sensor; the heating component is in contact with the bottom surface of the kettle body, the kettle bottom NTC is fixedly connected to the bottom surface of the kettle body, and the infrared temperature sensor faces the bottom surface of the kettle body; The step of measuring the temperature value T1 and the vibration value Z1 of the kettle body includes the following steps: The temperature value T2 is obtained through the NTC at the bottom of the pot, and the temperature value T3 is obtained through the infrared temperature sensor; The average value of the current temperature value T2 and the temperature value T3 is output as the current temperature value T1.

7. A silent water boiling method using a buzzer and a thermosensitive device according to claim 6, characterized in that: The heating component is provided with a heat plate NTC, and the heat plate NTC is fixedly connected to the outer surface of the heating component; The step of measuring the temperature value T1 and the vibration value Z1 of the kettle body includes the following steps: Obtain temperature value T4 through hot plate NTC; When it is detected that the difference between the temperature value T4 and the temperature value T1 is greater than 10° C., an alarm signal is issued and the heating of the kettle body is stopped.

8. A silent water-boiling device using a buzzer and a thermal sensor, characterized in that: include: a kettle body for holding water, and a heating assembly, a control circuit, a temperature sensor, and a vibration sensor respectively disposed on the outside of the kettle body, wherein the bottom of the kettle body abuts against the upper surface of the heating assembly; The heating component, temperature sensor and vibration sensor are electrically connected to the control circuit respectively. After power-on, the control circuit executes the silent water boiling method using a buzzer and a thermal sensor as described in any one of claims 1 to 7.

9. The silent water-boiling device using a buzzer and a thermal sensor according to claim 8, characterized in that: It includes a base, the control circuit, temperature sensor and vibration sensor are all arranged in the base, and the heating component is arranged on the upper surface of the base; The kettle body and the base are designed to be detachable, and the bottom surface of the kettle body is placed on the upper surface of the heating component.

10. The silent water-boiling device using a buzzer and a thermal sensor according to claim 8, characterized in that: The vibration sensor is a buzzer, and the output end of the buzzer is provided with a signal amplifying circuit, and the signal amplifying circuit is electrically connected to the control circuit; The temperature sensor includes a kettle bottom NTC, an infrared temperature sensor and a hot plate NTC; the kettle bottom NTC is closely attached to the bottom of the kettle body, the infrared temperature sensor faces the bottom of the kettle body, and the hot plate NTC is closely attached to the outer surface of the heating component.

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