Electric kettle control circuit

Abstract

The utility model discloses a control circuit of an electric kettle. The control circuit comprises a power supply module, and a master control module, a heating control module, a temperature detection module and an adjusting module which are connected with the output end of the power supply module, the input end of the power module is connected with an external power supply; the heating control module is connected with the main control module and used for controlling on-off of the heating assembly. The temperature detection module is connected with the main control module and is used for detecting water temperature; the adjusting module is connected with the main control module and used for setting a boiling point value; the main control module can cut off power supply of the heating assembly through the heating control module when the temperature detection module detects that the water temperature reaches the set boiling point value. By means of the structure, a user or an after-sales worker can set local boiling point data by himself / herself, the electric kettle can be controlled to be powered off according to the stored boiling point data every time in later use, water spraying caused by continuous boiling is avoided, and the risk that the user is scalded by the user is reduced.

Description

Technical Field

[0001] The utility model relates to the field of electric kettles, in particular to a control circuit of an electric kettle. Background Art

[0002] At present, electric kettles controlled by circuits usually use the boiling point of water (100°C) under standard atmospheric pressure as the power-off temperature point. With the help of protection programs, they can also automatically cut off the power when heating in plateau areas. However, ordinary protection programs determine whether the water is boiled if the water temperature in the kettle does not rise within a certain period of time during the heating process.

[0003] However, when this kettle is actually working in high-altitude areas such as plateaus, since the water temperature in the kettle cannot reach 100°C, each time water is boiled, the power can only be cut off by the protection program. This will cause the water in the kettle to reach the boiling point in high-altitude areas and continue to boil and roll for the time set by the protection program before the power can be cut off. During the continuous boiling process, hot water is very likely to gush out of the kettle, causing a great risk of scalding the user; therefore, an electric kettle control circuit is urgently needed to solve the above problems. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an electric kettle control circuit.

[0005] The technical solution adopted by an embodiment of the utility model to solve the technical problem is: an electric kettle control circuit, including a power module and a main control module connected to the output end of the power module, a heating control module, a temperature detection module and an adjustment module;

[0006] The input end of the power module is connected to an external power supply;

[0007] The heating control module is connected to the main control module and is used to control the on and off of the heating component;

[0008] The temperature detection module is connected to the main control module and is used to detect the water temperature;

[0009] The regulating module is connected to the main control module and is used to set the boiling point value;

[0010] The main control module can cut off the power supply of the heating component through the heating control module when the temperature detection module detects that the water temperature reaches the set boiling point value.

[0011] As one of the preferred embodiments of the utility model, the power module includes a fuse F1, a diode D2-4, an inductor L1-2, a capacitor C1, a capacitor EC1-3, a resistor R2-4 and a buck chip U1, one end of the fuse F1 is connected to one end of the external power supply, the other end of the fuse F1 is connected to one end of the inductor L1 and one end of the capacitor EC1 through a diode D2 and a diode D3, and the other end of the inductor L1 is connected to the Dr of the buck chip U1. ain terminal, the VDD terminal of the buck chip U1 is connected to the GND terminal of the buck chip U1 and one end of the resistor R2 via the capacitor C1, the other end of the resistor R2 is connected to the FB terminal of the buck chip U1 and one end of the resistor R3, the other end of the resistor R3 is connected to one end of the capacitor EC3, one end of the inductor L2 is connected to the GND terminal of the buck chip U1, the other end of the inductor L2 is respectively connected to one end of the resistor R4 and the subsequent circuit, the cathode of the diode D4 is connected to the GND terminal of the buck chip U1, the other end of the capacitor EC1, the other end of the capacitor EC2, the other end of the capacitor EC3, the anode of the diode D4, the other end of the resistor R4 and the other end of the external power supply are grounded.

[0012] As one of the preferred embodiments of the utility model, the heating control module includes a transistor Q1, a resistor R1, a diode D1 and a relay REL1. The base of the transistor Q1 is connected to the main control module via the resistor R1, the collector of the transistor Q1 is respectively connected to the anode of the diode D1 and one end of the coil of the relay REL1, the cathode of the diode D1 is respectively connected to the other end of the coil of the relay REL1 and the power supply module, the contacts of the relay REL1 are connected in series between one end of the external power supply and the heating component, and the emitter of the transistor Q1 is grounded.

[0013] As one of the preferred embodiments of the utility model, the temperature detection module includes a capacitor C5, a resistor R6 and a resistor R10, one end of the capacitor C5 is respectively connected to one end of the resistor R6, one end of the resistor R10 and the temperature sensor, one end of the resistor R6 is connected to the main control module, the other end of the resistor R10 is connected to the power supply module, and the other end of the capacitor C5 is grounded.

[0014] As one of the preferred embodiments of the present utility model, the adjustment module is configured as a burning interface.

[0015] As one of the preferred embodiments of the present utility model, the adjustment module is configured as an adjustment button.

[0016] As one of the preferred embodiments of the present utility model, an electric kettle control circuit further includes a display module connected to the power module and the main control module respectively.

[0017] As one of the preferred embodiments of the present utility model, an electric kettle control circuit further includes a function key module connected to the power module and the main control module respectively.

[0018] The beneficial effects of the utility model include: an electric kettle control circuit, comprising a power module and a main control module, a heating control module, a temperature detection module and an adjustment module connected to the output end of the power module; the input end of the power module is connected to an external power supply; the heating control module is connected to the main control module to control the on and off of the heating component; the temperature detection module is connected to the main control module to detect the water temperature; the adjustment module is connected to the main control module to set the boiling point value; the main control module can cut off the power supply of the heating component through the heating control module when the temperature detection module detects that the water temperature reaches the set boiling point value; through the above structure, users or after-sales personnel can set local boiling point data by themselves, and in subsequent use, the electric kettle will control the power off of the kettle every time with the saved boiling point data, avoid continuous boiling and water spraying, and reduce the risk of scalding the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a principle block diagram of an electric kettle control circuit;

[0021] Figure 2 This is the circuit schematic diagram of the main control module;

[0022] Figure 3 This is the circuit schematic diagram of the adjustment module;

[0023] Figure 4 It is the circuit schematic diagram of the power module and the heating control module;

[0024] Figure 5 This is the circuit schematic diagram of the temperature detection module;

[0025] Figure 6 It is the circuit schematic diagram of the display module;

[0026] Figure 7 This is the circuit schematic diagram of the function key module;

[0027] Figure 8 This is the circuit schematic diagram for connecting the terminal module. DETAILED DESCRIPTION

[0028] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0029] In the description of the present utility model, the meaning of "more than" is more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0032] Reference Figures 1 to 8 , an electric kettle control circuit, comprising a power module 10 and a main control module 20 connected to the output end of the power module 10, a heating control module 30, a temperature detection module 40 and an adjustment module 50;

[0033] The input end of the power module 10 is connected to an external power source;

[0034] The heating control module 30 is connected to the main control module 20 and is used to control the on and off of the heating component;

[0035] The temperature detection module 40 is connected to the main control module 20 and is used to detect the water temperature;

[0036] The adjustment module 50 is connected to the main control module 20 and is used to set the boiling point value;

[0037] The main control module 20 can cut off the power supply of the heating component through the heating control module 30 when the temperature detection module 40 detects that the water temperature reaches the set boiling point value.

[0038] In the present invention, the voltage input by the external power supply is divided into two paths, one path is directly connected to the heating control module 30, and the other path provides the working voltage for the subsequent circuit after being stepped down by the power module 10, wherein the temperature detection module 40 can provide the water temperature data in the kettle, and the adjustment module 50 allows the user to set the boiling point value according to the local altitude, and the main control module 20 controls the on and off of the heating component through the heating control module 30 according to the water temperature data fed back by the temperature detection module 40; specifically, for example, the boiling point at a certain altitude is 90°C, and the user or after-sales personnel changes the boiling point value from 100°C to 90°C through the adjustment module 50, when the temperature When the water temperature fed back by the detection module 40 is lower than 90°C, the main control module 20 turns on the heating component through the heating control module 30, so that the heating component works and heats the water in the kettle, until the water temperature fed back by the temperature detection module 40 is ≥90°C, the heating control module 30 cuts off the power supply of the heating component and stops the heating component from working; the advantage of the utility model is that through the above structure, the user or after-sales personnel can set the local boiling point data by themselves, and in subsequent use, the electric kettle will control the power off of the kettle every time with the saved boiling point data, so as to avoid continuous boiling and water spraying, and reduce the risk of scalding the user.

[0039] As a preferred embodiment of the power module 10, the power module 10 includes a fuse F1, a diode D2-4, an inductor L1-2, a capacitor C1, a capacitor EC1-3, a resistor R2-4 and a buck chip U1. One end of the fuse F1 is connected to one end of the external power supply, and the other end of the fuse F1 is connected to one end of the inductor L1 and one end of the capacitor EC1 through the diode D2 and the diode D3, respectively. The other end of the inductor L1 is connected to the Dr of the buck chip U1. ain terminal, the VDD terminal of the buck chip U1 is connected to the GND terminal of the buck chip U1 and one end of the resistor R2 via the capacitor C1, the other end of the resistor R2 is connected to the FB terminal of the buck chip U1 and one end of the resistor R3, the other end of the resistor R3 is connected to one end of the capacitor EC3, one end of the inductor L2 is connected to the GND terminal of the buck chip U1, the other end of the inductor L2 is respectively connected to one end of the resistor R4 and the subsequent circuit, the cathode of the diode D4 is connected to the GND terminal of the buck chip U1, the other end of the capacitor EC1, the other end of the capacitor EC2, the other end of the capacitor EC3, the anode of the diode D4, the other end of the resistor R4 and the other end of the external power supply are grounded.

[0040] As a preferred embodiment of the heating control module 30, the heating control module 30 includes a transistor Q1, a resistor R1, a diode D1 and a relay REL1. The base of the transistor Q1 is connected to the main control module 20 via the resistor R1, the collector of the transistor Q1 is respectively connected to the anode of the diode D1 and one end of the coil of the relay REL1, the cathode of the diode D1 is respectively connected to the other end of the coil of the relay REL1 and the power module 10, the contacts of the relay REL1 are connected in series between one end of the external power supply and the heating component, and the emitter of the transistor Q1 is grounded.

[0041] As a preferred embodiment of the temperature detection module 40, the temperature detection module 40 includes a capacitor C5, a resistor R6 and a resistor R10, one end of the capacitor C5 is respectively connected to one end of the resistor R6, one end of the resistor R10 and the temperature sensor, one end of the resistor R6 is connected to the main control module 20, the other end of the resistor R10 is connected to the power supply module 10, and the other end of the capacitor C5 is grounded.

[0042] In one embodiment, the adjustment module 50 is configured as a burning interface; the boiling point value is adjusted by direct burning.

[0043] In another embodiment, the adjustment module 50 is configured as an adjustment button; the boiling point value is adjusted by button setting.

[0044] Preferably, an electric kettle control circuit further comprises a display module 60 connected to the power module 10 and the main control module 20 respectively, and used for displaying temperature, boiling point value and the like.

[0045] In a further embodiment, an electric kettle control circuit also includes a function button module 70 connected to the power module 10 and the main control module 20 respectively; the function button module 70 includes but is not limited to a power button, a temperature setting button, a boiling point adjustment button, etc.; a connection terminal module 80 is also provided for connecting a temperature sensor, etc.

[0046] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. An electric kettle control circuit, characterized in that: It comprises a power module (10), a main control module (20), a heating control module (30), a temperature detection module (40) and an adjustment module (50) connected to the output end of the power module (10); The input end of the power module (10) is connected to an external power source; The heating control module (30) is connected to the main control module (20) and is used to control the on and off of the heating component; The temperature detection module (40) is connected to the main control module (20) and is used to detect water temperature; The regulating module (50) is connected to the main control module (20) and is used to set the boiling point value; The main control module (20) can cut off the power supply of the heating component through the heating control module (30) when the temperature detection module (40) detects that the water temperature has reached a set boiling point value.

2. An electric kettle control circuit according to claim 1, characterized in that: The power module (10) comprises a fuse F1, a diode D2-4, an inductor L1-2, a capacitor C1, a capacitor EC1-3, a resistor R2-4 and a step-down chip U1, one end of the fuse F1 is connected to one end of an external power source, the other end of the fuse F1 is connected to one end of the inductor L1 and one end of the capacitor EC1 via a diode D2 and a diode D3 respectively, the other end of the inductor L1 is connected to the Dr of the step-down chip U1 respectively ain terminal, the VDD terminal of the buck chip U1 is connected to the GND terminal of the buck chip U1 and one end of the resistor R2 via the capacitor C1, the other end of the resistor R2 is connected to the FB terminal of the buck chip U1 and one end of the resistor R3, the other end of the resistor R3 is connected to one end of the capacitor EC3, one end of the inductor L2 is connected to the GND terminal of the buck chip U1, the other end of the inductor L2 is respectively connected to one end of the resistor R4 and the subsequent circuit, the cathode of the diode D4 is connected to the GND terminal of the buck chip U1, the other end of the capacitor EC1, the other end of the capacitor EC2, the other end of the capacitor EC3, the anode of the diode D4, the other end of the resistor R4 and the other end of the external power supply are grounded.

3. An electric kettle control circuit according to claim 1, characterized in that: The heating control module (30) comprises a transistor Q1, a resistor R1, a diode D1 and a relay REL1, the base of the transistor Q1 is connected to the main control module (20) via the resistor R1, the collector of the transistor Q1 is respectively connected to the anode of the diode D1 and one end of the coil of the relay REL1, the cathode of the diode D1 is respectively connected to the other end of the coil of the relay REL1 and the power module (10), the contact of the relay REL1 is connected in series between one end of the external power supply and the heating component, and the emitter of the transistor Q1 is grounded.

4. The electric kettle control circuit according to claim 1, characterized in that: The temperature detection module (40) comprises a capacitor C5, a resistor R6 and a resistor R10; one end of the capacitor C5 is respectively connected to one end of the resistor R6, one end of the resistor R10 and the temperature sensor; one end of the resistor R6 is connected to the main control module (20); the other end of the resistor R10 is connected to the power module (10); and the other end of the capacitor C5 is grounded.

5. The electric kettle control circuit according to claim 1, characterized in that: The regulating module (50) is configured as a burning interface.

6. The electric kettle control circuit according to claim 1, characterized in that: The adjustment module (50) is configured as an adjustment button.

7. The electric kettle control circuit according to claim 1, characterized in that: It also includes a display module (60) connected to the power module (10) and the main control module (20) respectively.

8. The electric kettle control circuit according to claim 1, characterized in that: It also includes a function key module (70) connected to the power module (10) and the main control module (20) respectively.

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