Water level sensing based dry boiling protection structure of electric kettle

Abstract

The utility model discloses a kind of dry-burning protection structure of electric kettle based on water level induction, it is related to electric kettle protection technical field, including: base;The upper portion of base is placed with kettle body, kettle body is the structure made of non-metal material, the upper portion of kettle body is provided with embedded kettle cover, the side of kettle body is provided with handle, and the top of handle is provided with switch;The side of kettle body is provided with high water level sensor located at high place, the side of kettle body is provided with low water level sensor located at low place, and the outside of kettle body is provided with transmission line.The high water level sensor and low water level sensor of setting in the outside of kettle body can detect the water level inside kettle body respectively, the lowest water level inside kettle body is detected using low water level sensor, when lower than the water level, the heating plate inside kettle body does not work, thereby avoiding dry-burning condition of electric kettle, and good protection effect is played to electric kettle.

Description

Technical Field

[0001] This utility model relates to the field of electric kettle protection technology, specifically to an anti-dry-boil protection structure for electric kettles based on water level sensing. Background Technology

[0002] An electric kettle is an everyday appliance used to boil water. Most electric kettles consist of two parts: a heating element and a kettle body. When boiling water, water is filled into the kettle body, and the kettle body is placed on the heating element. The heating plate in the heating element heats the water in the kettle body.

[0003] Even when there is no water inside the kettle, the heating element will still heat the interior, causing the kettle to dry-boil and potentially damage it. Some kettles have a water level sensor installed at the bottom inside to prevent this. However, installing the water level sensor requires an opening in the bottom of the kettle and a rubber sealing ring to secure it. Over time, bacteria can easily grow in this area, making cleaning difficult and increasing the risk of leaks. Therefore, we propose a water level sensor-based anti-dry-boil protection structure for electric kettles. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a water level sensing-based anti-dry-boil protection structure for electric kettles, solving the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a water level sensing-based anti-dry-boil protection structure for an electric kettle, comprising: a base; a kettle body is placed on top of the base, the kettle body is a structure made of non-metallic material, an embedded kettle lid is provided on top of the kettle body, a handle is provided on one side of the kettle body, and a switch is provided on the top of the handle;

[0006] A high-level water sensor is installed on one side of the kettle body, and a low-level water sensor is installed on the other side. A transmission line is installed on the outside of the kettle body. One end of the transmission line is connected to the high-level water sensor and the low-level water sensor respectively, and the other end of the transmission line is connected to a switch through an intermediate relay.

[0007] Preferably, a power interface is provided on one side of the base, an integrally formed limiting ring is provided on the top of the base, and a power connector is fixedly provided at the center of the upper part of the base.

[0008] Preferably, a heating plate is fixedly installed at the bottom of the kettle body, and a power connector is installed at the center of the bottom of the heating plate.

[0009] Preferably, the center of the lid has a through steam outlet.

[0010] Preferably, both the high water level sensor and the low water level sensor are glued to the outer surface of the kettle body.

[0011] Preferably, both the high water level sensor and the low water level sensor are capacitive liquid level sensors.

[0012] Preferably, the principle of water level detection by the high water level sensor and the low water level sensor is to detect the difference between the capacitance on the CIN2 pin and the capacitance on the CIN1 pin. When CIN2 > CIN1 + 0.2pF, water is detected inside the kettle; otherwise, there is no water. The sensitivity of the sensor can be adjusted by adjusting the capacitance of C1.

[0013] This utility model provides a water level sensing-based anti-dry-boil protection structure for electric kettles, which has the following beneficial effects:

[0014] 1. By using high-water-level and low-water-level sensors located on the outside of the kettle, the water level inside the kettle can be detected. The low-water-level sensor detects the lowest water level inside the kettle. When the water level is below this level, the heating plate inside the kettle will not work, thus preventing the electric kettle from dry-burning and providing good protection for the electric kettle.

[0015] 2. Because both the high-level and low-level sensors are located on the outside of the kettle, there is no need to drill holes in the kettle when installing them. The sensors do not need to come into contact with water to detect the liquid level inside the kettle, which makes it easier to clean the kettle and avoids leakage or bacterial growth after long-term use, making it more practical. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the separate structure of the kettle body and base of an electric kettle with anti-dry-boil protection structure based on water level sensing according to this utility model.

[0017] Figure 2 This is a schematic diagram of the kettle body structure of an electric kettle with anti-dry-boil protection structure based on water level sensing according to this utility model;

[0018] Figure 3 This is a schematic diagram of the transparent material state structure of the kettle body of an electric kettle with a water level sensing-based anti-dry-boil protection structure according to this utility model.

[0019] Figure 4 This is a control flowchart of an anti-dry-boil protection structure for an electric kettle based on water level sensing, according to this utility model.

[0020] Figure 5 This is a circuit diagram of a water level sensor for an electric kettle's anti-dry-boil protection structure based on water level sensing, according to this utility model.

[0021] 1. Base; 11. Power cord interface; 12. Limiting ring; 13. Power connector one; 2. Kettle body; 21. Power connector two; 22. Heating plate; 3. Kettle lid; 31. Steam outlet; 4. Handle; 5. Switch; 6. High water level sensor; 7. Low water level sensor; 8. Transmission line. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] like Figures 1-5 As shown, this utility model provides a technical solution: a water level sensing-based anti-dry-boil protection structure for an electric kettle, comprising: a base 1; a kettle body 2 placed on top of the base 1, the kettle body 2 being a non-metallic material structure, an embedded kettle lid 3 provided on top of the kettle body 2, a handle 4 provided on one side of the kettle body 2, and a switch 5 provided on the top of the handle 4; a high water level sensor 6 located at a high position is provided on one side of the kettle body 2, and a low water level sensor 7 located at a low position is provided on one side of the kettle body 2; a transmission line 8 is provided on the outside of the kettle body 2, one end of the transmission line 8 being connected to the high water level sensor 6 and the low water level sensor 7 respectively, and the other end of the transmission line 8 being connected to the switch 5 through an intermediate relay.

[0024] As one embodiment of the present invention, it includes: a base 1; a power interface 11 is provided on one side of the base 1, and an external power cord plug is inserted into the power interface 11 to provide power to the base 1; an integrally formed limiting ring 12 is provided on the top of the base 1, and the bottom of the pot body 2 is inserted into the limiting ring 12 to facilitate the operator to place the pot body 2 on the base 1; and a power connector 13 is fixedly provided at the center of the top of the base 1, and the power connector 13 is used in conjunction with the power connector 21.

[0025] In another embodiment of this utility model, a kettle body 2 is placed on top of the base 1. The kettle body 2 is made of non-metallic material. A heating plate 22 is fixedly installed below the kettle body 2, and a power connector 21 is provided at the center of the bottom of the heating plate 22. After the kettle body 2 is placed on top of the base 1, the power connector 21 is inserted into the power connector 11, thereby enabling the base 1 to supply power to the kettle body 2, so that the heating plate 22 can generate heat energy to heat the water inside the kettle body 2.

[0026] In another embodiment of this utility model, an embedded lid 3 is provided on the top of the kettle body 2, and a through steam outlet 31 is provided at the center of the lid 3. The steam outlet 31 facilitates the release of high-pressure and high-temperature steam inside the kettle body 2. A handle 4 is provided on one side of the kettle body 2, and a switch 5 is provided on the top of the handle 4.

[0027] In one embodiment of this utility model, a high-level water sensor 6 is provided on one side of the kettle body 2 at a higher position, and a low-level water sensor 7 is provided on the other side of the kettle body 2 at a lower position. Both the high-level water sensor 6 and the low-level water sensor 7 are glued to the outer surface of the kettle body 2. Epoxy resin adhesive is used; characteristics: high strength, chemical corrosion resistant.

[0028] Specifically, both the high-level sensor 6 and the low-level sensor 7 are capacitive level sensors, model LST300; features: digital signal output, suitable for process automation control.

[0029] Specifically, the water level detection principle of the high water level sensor 6 and the low water level sensor 7 is to detect the difference between the capacitance on the CIN2 pin and the capacitance on the CIN1 pin. When CIN2 > CIN1 + 0.2pF, water is detected inside the kettle body 2; otherwise, there is no water. The sensitivity of the sensor can be adjusted by adjusting the capacitance of C1.

[0030] The capacitive level sensor consists of two electrodes (typically coaxial cylindrical or parallel plate structures). One electrode (probe) is located near the outer wall of the container body 2, while the other electrode is referenced to ground or the container wall itself. The capacitance formula is: C = Where (C) is the capacitance, ( (A) is the dielectric constant (the value of the mixture of liquid and air), (A) is the effective area of ​​the plates, and (d) is the distance between the plates. Capacitance-to-signal conversion: The oscillating circuit converts the capacitance change into a frequency or voltage signal, which is then amplified and filtered before being output. Linearization calibration: The nonlinearity of the dielectric constant is compensated by an algorithm, and a standard signal (4-20mA or digital signal) is output.

[0031] In another embodiment of this utility model, a transmission line 8 is provided on the outside of the kettle body 2. One end of the transmission line 8 is connected to the high water level sensor 6 and the low water level sensor 7 respectively, and the other end of the transmission line 8 is connected to the switch 5 through an intermediate relay. When the high water level sensor 6 and the low water level sensor 7 detect the liquid level inside the kettle body 2, the high water level sensor 6 and the low water level sensor 7 send a high-level signal to the intermediate relay, and then the intermediate relay controls the switch 5 to disconnect the circuit, thereby turning off the heating plate 22 and preventing dry burning when there is no water inside the kettle body 2.

Claims

1. A water level sensing-based anti-dry-boil protection structure for an electric kettle, comprising: The base (1) is characterized in that: a pot body (2) is placed on the top of the base (1), the pot body (2) is a structure made of non-metallic material, an embedded pot lid (3) is provided on the top of the pot body (2), a handle (4) is provided on one side of the pot body (2), and a switch (5) is provided on the top of the handle (4). A high water level sensor (6) is provided on one side of the kettle body (2), and a low water level sensor (7) is provided on one side of the kettle body (2). A transmission line (8) is provided on the outside of the kettle body (2). One end of the transmission line (8) is connected to the high water level sensor (6) and the low water level sensor (7) respectively, and the other end of the transmission line (8) is connected to the switch (5) through an intermediate relay.

2. The anti-dry-boil protection structure for an electric kettle based on water level sensing according to claim 1, characterized in that: A power interface (11) is provided on one side of the base (1), an integrally formed limiting ring (12) is provided on the top of the base (1), and a power connector (13) is fixedly provided at the center of the top of the base (1).

3. The anti-dry-boil protection structure for an electric kettle based on water level sensing according to claim 1, characterized in that: A heating plate (22) is fixedly installed below the kettle body (2), and a power connector (21) is installed at the center of the bottom of the heating plate (22).

4. The anti-dry-boil protection structure for an electric kettle based on water level sensing according to claim 1, characterized in that: The lid (3) has a through steam outlet (31) at its center.

5. The anti-dry-boil protection structure for an electric kettle based on water level sensing according to claim 1, characterized in that: The high water level sensor (6) and the low water level sensor (7) are both glued to the outer surface of the pot body (2).

6. The anti-dry-boil protection structure for an electric kettle based on water level sensing according to claim 1, characterized in that: Both the high water level sensor (6) and the low water level sensor (7) are capacitive liquid level sensors.

7. The anti-dry-boil protection structure for an electric kettle based on water level sensing according to claim 1, characterized in that: The principle of water level detection by the high water level sensor (6) and the low water level sensor (7) is to detect the difference between the capacitance on the CIN2 pin and the capacitance on the CIN1 pin. When CIN2 > CIN1 + 0.2pF, water is detected inside the kettle body (2), otherwise there is no water. The sensitivity of the sensor can be adjusted by adjusting the capacitance of C1.

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