Electric kettle with multiple safety protection functions

Abstract

The utility model discloses an electric kettle with multiple safety protection functions, which comprises an NTC (Negative Temperature Coefficient) detection module, a setting module, a control module, a timing module I and a timing module II, and the control module is electrically connected with an alarm module and a load; the NTC detection module is used for detecting the water temperature, the NTC detection module is electrically connected with the setting module, the water temperature is compared with a reference value of the setting module, and a result is output; the first output end of the setting module is electrically connected with the input end of the timing module I, the second output end of the setting module is electrically connected with the input end of the timing module II, and corresponding signals are selectively output according to the duration of different comparison results; the output end of the timing module I is electrically connected with the input end of the control module, the output end of the timing module II is electrically connected with the input end of the control module, and the timing module I and the timing module II are used for selectively controlling the working state of the load and giving an alarm by the alarm module.

Description

Technical Field

[0001] This utility model belongs to the technical field of system protection, specifically an electric kettle with multiple safety protection functions. Background Technology

[0002] An electric kettle, also known as an electric water heater, is an appliance that uses electricity to quickly heat water. It converts electrical energy into heat energy through a built-in electric heating element, thereby quickly heating water. It is widely used in homes, offices, hotels, and other places.

[0003] Most electric kettles on the market have limited protection functions. For example, the "anti-dry kettle electric heating cover" disclosed in patent document "CN102357011A" has a technical solution that includes "a second magnet fixed at one end of an elastic copper spring, a sliding connecting rod inserted into the cavity of the shell, a first magnet fixed at the upper end of the connecting rod, and a float fixed at the lower end of the connecting rod".

[0004] In this patent, when the kettle is in a state of dry heating, the power is automatically cut off to protect the heating element from damage. However, the power can only be cut off when the kettle is boiling without water, so the protection function is limited. Utility Model Content

[0005] The purpose of this invention is to provide an electric kettle with multiple safety protection functions to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] An electric kettle with multiple safety protection functions includes an NTC detection module, a setting module, a control module, and a timing module 1 and a timing module 2. The control module is electrically connected to an alarm module and a load.

[0008] The NTC detection module is used to detect water temperature. The output terminal of the NTC detection module is electrically connected to the input terminal of the setting module, and is used to compare the water temperature with the reference value of the setting module and output the comparison result.

[0009] The setting module is used to output a corresponding signal based on the comparison results of the duration.

[0010] The output terminal of the timing module one is electrically connected to the input terminal of the control module, and the output terminal of the timing module two is electrically connected to the input terminal of the control module, used to select and control the working state of the load and the alarm module to sound an alarm.

[0011] In a further technical solution, the setting module includes a first comparator, a first storage unit, a second comparator, and a second storage unit; the first output terminal of the NTC detection module is electrically connected to the first comparator, the first comparator is electrically connected to the first storage unit, and the output terminal of the first comparator is electrically connected to the first timing module; the second output terminal of the NTC detection module is electrically connected to the second comparator, the second comparator is electrically connected to the second storage unit, and the output terminal of the second comparator is electrically connected to the second timing module.

[0012] In a further technical solution, the timing module one includes a constant temperature detector one and a timer one, and the timing module two includes a constant temperature detector two and a timer two. The output terminal of the comparator one is electrically connected to the input terminal of the constant temperature detector one, the output terminal of the constant temperature detector one is electrically connected to the input terminal of the timer one, and the output terminal of the timer one is electrically connected to the control module; the output terminal of the comparator two is electrically connected to the input terminal of the constant temperature detector two, the output terminal of the constant temperature detector two is electrically connected to the input terminal of the timer two, and the output terminal of the timer two is electrically connected to the control module.

[0013] In a further technical solution, the alarm module includes a digital tube and a buzzer. The first output terminal of the control module is electrically connected to the digital tube, and the second output terminal of the control module is electrically connected to the buzzer. The signal transmitted by the timing module one corresponds to the alarm code one displayed on the digital tube, and the signal transmitted by the timing module two corresponds to the alarm code two displayed on the digital tube.

[0014] In a further technical solution, the NTC detection module is electrically connected to an anti-dry-burning module. The anti-dry-burning module includes a calculation unit, a comparator three, and a storage unit three. The output terminal of the calculation unit is electrically connected to the input terminal of the comparator three, the output terminal of the storage unit three is electrically connected to the input terminal of the comparator three, and the output terminal of the comparator three is electrically connected to the control module.

[0015] In a further technical solution, the control module is electrically connected to a switch module, which is used to turn the load on and off.

[0016] In a further technical solution, the switching module includes a switch, a switch detector, and a comparator four. The output terminal of the switch is electrically connected to the input terminal of the switch detector. The switch detector is used to detect the state of the switch and output a signal. The output terminal of the switch detector is electrically connected to the input terminal of the comparator four. The comparator four is electrically connected to the control module.

[0017] The beneficial effects of this utility model are:

[0018] This invention provides a solution where, under normal conditions, the water temperature should gradually increase from 20°C to 100°C and remain constant at 100°C. However, if improper operation during production leads to inaccurate temperature control, causing the actual water temperature to fail to reach 100°C, and the electric kettle stops heating at 98°C, the water may not actually boil, resulting in a water temperature that is unsuitable for drinking. Once the water temperature reaches 98°C, the setting module sends a signal to the timing module. The timing module detects that the 98°C signal is continuous and begins timing. After 50 seconds of timing, the timing module generates a new signal and transmits it to the control module. Upon receiving the new signal, the control module controls the load's power management system to stop supplying power to the load, causing the load to stop working. The control module also controls the alarm module to sound an alarm to alert the user of the malfunction.

[0019] Suppose that the NTC temperature detection module malfunctions during production, causing the detected water temperature to stop changing before reaching 90°C-100°C. We determine this as a malfunction of the NTC temperature detection module. Suppose that after the NTC temperature detection module detects a water temperature of 37°C, the setting module will send a signal to the timing signal 1. The timing module 1 detects that the 37°C signal is continuous, so it starts timing. After timing for 1 second, the timing module 1 generates a new signal and sends it to the control module. Upon receiving the new signal, the control module controls the alarm module to sound an alarm to alert the user to the malfunction.

[0020] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0021] Figure 1 The process of this utility model Figure 1 .

[0022] Figure 2 The process of this utility model Figure 2 .

[0023] Figure 3 The circuit of this utility model Figure 1 .

[0024] Figure 4 The circuit of this utility model Figure 2 .

[0025] Figure 5 The circuit of this utility model Figure 3 .

[0026] Figure 6 The circuit of this utility model Figure 4 .

[0027] Figure 7 The circuit of this utility model Figure 5 .

[0028] Figure 8 The circuit of this utility model Figure 6 .

[0029] Figure 9 The circuit of this utility model Figure 7 . Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0031] Please refer to Figure 1-9 ;

[0032] An electric kettle with multiple safety protection functions includes an NTC detection module, a setting module, a control module, and two timing modules. The control module is electrically connected to an alarm module and a load. The NTC detection module detects the water temperature, and its output is electrically connected to the input of the setting module. It compares the water temperature with a reference value from the setting module and outputs different comparison results. In this embodiment, the setting module includes two temperature range settings: 20°-90°C and 95°-99°C. Under normal conditions, the water temperature should gradually increase from 20°C to 100°C and remain constant at 100°C. The first output of the setting module is electrically connected to the input of the first timing module, and the second output of the setting module is electrically connected to the input of the second timing module. The timing module is used to select the corresponding output signal based on the duration of different comparison results. In this embodiment, when the water temperature is between 20°C and 90°C, the setting module transmits the signal to the timing module one. The function of the timing module one is to start timing upon receiving the same temperature signal. The timing module one's timing time is 1 second, that is, after the same temperature signal lasts for 1 second, the timing module one generates a new signal. When the water temperature is between 95°C and 99°C, the setting module transmits the signal to the timing module two. The function of the timing module two is to start timing upon receiving the same temperature signal. The timing module two's timing time is 50 seconds, that is, after the same temperature signal lasts for 50 seconds, the timing module two generates a new signal. The output terminal of the timing module one is electrically connected to the input terminal of the control module, and is used to select the control load switch status and alarm module alarm.

[0033] Specifically, under normal circumstances, the water temperature should gradually rise from 20°C to 100°C and remain constant at 100°C. However, if improper operation during production leads to inaccurate temperature control, the actual water temperature may not reach 100°C. When the electric kettle heats the water, it stops at 98°C, making it difficult for the water to truly boil and thus failing to meet drinking requirements. After the water temperature reaches 98°C, the setting module will send a signal to the timing module. The timing module detects that the 98°C signal is continuous and starts timing. After 50 seconds of timing, the timing module will generate a new signal and send it to the control module. Upon receiving the new signal, the control module will control the load's power management system to stop supplying power to the load, causing the load to stop working. The control module will also control the alarm module to sound an alarm to alert the user of the malfunction.

[0034] Suppose that the NTC temperature detection module malfunctions during production, causing the detected water temperature to stop changing before reaching 90°C-100°C. We determine this as a malfunction of the NTC temperature detection module. Suppose that after the NTC temperature detection module detects a water temperature of 37°C, the setting module will send a signal to the timing signal 1. The timing module 1 detects that the 37°C signal is continuous, so it starts timing. After timing for 1 second, the timing module 1 generates a new signal and sends it to the control module. Upon receiving the new signal, the control module controls the alarm module to sound an alarm to alert the user to the malfunction.

[0035] It is worth noting that when the NTC detection module used to detect water temperature works well and does not malfunction between 20° and 90°, the possibility of it malfunctioning between 90° and 100° is relatively small. Therefore, this issue is not considered in this embodiment.

[0036] In this embodiment, the setting module includes a first comparator, a first memory, a second comparator, and a second memory; the first output terminal of the NTC detection module is electrically connected to the first comparator, the first comparator is electrically connected to the first memory, and the output terminal of the first comparator is electrically connected to the first timing module; the first timing module includes a first constant temperature detector and a first timer, the output terminal of the first comparator is electrically connected to the input terminal of the first constant temperature detector, the output terminal of the first constant temperature detector is electrically connected to the input terminal of the first timer, and the output terminal of the first timer is electrically connected to the control module; the second output terminal of the NTC detection module is electrically connected to the second comparator, and the second comparator is electrically connected to the memory. The two modules are electrically connected: the output of comparator two is electrically connected to timing module two, which includes a constant temperature detector two and a timer two; the output of comparator two is electrically connected to the input of constant temperature detector two, the output of constant temperature detector two is electrically connected to the input of timer two, and the output of timer two is electrically connected to the control module; the alarm module includes a digital tube and a buzzer; the first output of the control module is electrically connected to the digital tube, and the second output of the control module is electrically connected to the buzzer; the signal transmitted by timing module one corresponds to alarm code one displayed on the digital tube, and the signal transmitted by timing module two corresponds to alarm code two displayed on the digital tube.

[0037] Specifically, when the NTC detection module detects a water temperature between 20°C and 90°C and between 95°C and 99°C, it transmits the water temperature signal to Comparator 1 and Comparator 2. Similarly, Memory 1 transmits the signal range of 20°C-90°C to Comparator 1, and Memory 2 transmits the signal range of 95°C-99°C to Comparator 2. When the temperature is 98°C, Comparator 2 transmits the signal to Constant Temperature Detector 2. When Constant Temperature Detector 2 detects that the temperature remains constant, it controls Timer 2 to start timing. After Timer 2 has been timing for 50 seconds, it generates a new signal and transmits it to... Upon receiving a new signal, the control module controls the load's power management system to stop supplying power to the load, causing the load to stop working. The control module also controls the digital display to show alarm code two and the buzzer to sound continuously. When the temperature is 37°C, comparator one transmits a signal to constant temperature detector one. Constant temperature detector one detects that the temperature remains constant and starts timing. After timing one lasts for 1 second, it generates a new signal and transmits it to the control module. The control module then controls the digital display to show alarm code one and the buzzer to sound continuously to alert the user to the malfunction.

[0038] In this embodiment, the NTC detection module is electrically connected to an anti-dry-burning module. The anti-dry-burning module includes a calculation unit, a comparator three, and a storage unit three. The output terminal of the calculation unit is electrically connected to the input terminal of the comparator three, the output terminal of the storage unit three is electrically connected to the input terminal of the comparator three, and the output terminal of the comparator three is electrically connected to the control module.

[0039] Specifically, when the electric kettle is in a dry-boiling state, the value detected by the NTC detection module will rise rapidly. Simultaneously, the value detected by the NTC detection module is transmitted to the calculation unit. The calculation unit calculates the rate of increase of the value detected by the NTC detection module based on its own time and the difference between the value detected by the NTC detection module over a period of time, and transmits this rate signal to comparator three. At the same time, storage three transmits a normal rate signal to comparator three. After comparison, if the rate of increase given by the calculation unit is not within the range of storage three, comparator three transmits a signal to the control module. Upon receiving the signal, the control module will control the load to stop working, that is, control the switch to enter the off state. Simultaneously, the control module will control the digital tube to display alarm code three, and the buzzer will sound continuously to alert the user to the malfunction.

[0040] In this embodiment, the control module is electrically connected to a switch module, which is used to turn the load on and off. The switch module includes a switch, a switch detector, and a comparator four. The output terminal of the switch is electrically connected to the input terminal of the switch detector. The switch detector is used to detect the state of the switch and output a signal. The output terminal of the switch detector is electrically connected to the input terminal of the comparator four. The comparator four is electrically connected to the control module.

[0041] Specifically, when the operator manually turns on the switch to start the water boiling function, the switch sends a signal to the control module, causing the control module to start the load. Simultaneously, the control module sends a "load is on" signal to comparator four. In this embodiment, this signal is set to "1". When the switch detector detects that the switch is on, it sends a signal to comparator four, also set to "1" in this embodiment. If the two signals are the same after comparison, the comparator four does not output a signal. When the switch detector detects that the switch is on, it sends a "1" signal to comparator four, while the control module sends a "load is off" signal to comparator four, set to "0" in this embodiment. Comparator 4 sends a signal to the control module, causing the control module to display alarm code 4 on the digital tube and sound a continuous buzzer to alert the user that a malfunction has occurred and the load is in a closed state. When the operator does not turn on the switch, the switch detector detects that the switch is in a closed state and sends a signal to comparator 4. In this embodiment, this signal is set to "0". When the control module sends a working signal to the load due to a malfunction, causing the load to be in a closed state, the control module sends a "load is in a closed state" signal to comparator 4. Comparator 4 then sends a signal to the control module, causing the control module to display alarm code 5 on the digital tube and sound a continuous buzzer to alert the user that the control module has malfunctioned and the load is in an abnormally open state.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. An electric kettle with multiple safety protection functions, characterized in that, It includes an NTC detection module, a setting module, a control module, and timing module one and timing module two. The control module is electrically connected to the alarm module and the load. The NTC detection module is used to detect water temperature. The output terminal of the NTC detection module is electrically connected to the input terminal of the setting module, and is used to compare the water temperature with the reference value of the setting module and output the comparison result. The setting module is used to output a corresponding signal based on the comparison results of the duration. The output terminal of the timing module one is electrically connected to the input terminal of the control module, and the output terminal of the timing module two is electrically connected to the input terminal of the control module, used to select and control the state of the load switch and the alarm module.

2. An electric kettle with multiple safety protection functions according to claim 1, characterized in that, The setting module includes a first comparator, a first storage unit, a second comparator, and a second storage unit; the first output terminal of the NTC detection module is electrically connected to the first comparator, the first comparator is electrically connected to the first storage unit, and the output terminal of the first comparator is electrically connected to the first timing module; the second output terminal of the NTC detection module is electrically connected to the second comparator, the second comparator is electrically connected to the second storage unit, and the output terminal of the second comparator is electrically connected to the second timing module.

3. An electric kettle with multiple safety protection functions according to claim 2, characterized in that, The timing module one includes a constant temperature detector one and a timer one, and the timing module two includes a constant temperature detector two and a timer two. The output terminal of the comparator one is electrically connected to the input terminal of the constant temperature detector one, the output terminal of the constant temperature detector one is electrically connected to the input terminal of the timer one, and the output terminal of the timer one is electrically connected to the control module. The output terminal of the comparator two is electrically connected to the input terminal of the constant temperature detector two, the output terminal of the constant temperature detector two is electrically connected to the input terminal of the timer two, and the output terminal of the timer two is electrically connected to the control module.

4. An electric kettle with multiple safety protection functions according to claim 1, characterized in that, The alarm module includes a digital tube and a buzzer. The first output terminal of the control module is electrically connected to the digital tube, and the second output terminal of the control module is electrically connected to the buzzer. The signal transmitted by the timing module one corresponds to the alarm code one displayed on the digital tube, and the signal transmitted by the timing module two corresponds to the alarm code two displayed on the digital tube.

5. An electric kettle with multiple safety protection functions according to claim 1, characterized in that, The NTC detection module is electrically connected to an anti-dry-burning module, which includes a calculation unit, a comparator three, and a storage unit three. The output of the calculation unit is electrically connected to the input of the comparator three, the output of the storage unit is electrically connected to the input of the comparator three, and the output of the comparator three is electrically connected to the control module.

6. An electric kettle with multiple safety protection functions according to claim 1, characterized in that, The control module is electrically connected to a switch module, which is used to turn the load on and off.

7. An electric kettle with multiple safety protection functions according to claim 6, characterized in that, The switching module includes a switch, a switch detector, and a comparator four. The output terminal of the switch is electrically connected to the input terminal of the switch detector. The switch detector is used to detect the state of the switch and output a signal. The output terminal of the switch detector is electrically connected to the input terminal of the comparator four. The comparator four is electrically connected to the control module.

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