Electric kettle liquid level detection probe and liquid level detection method

Abstract

The present invention discloses an electric kettle liquid level detection probe and a liquid level detection method, wherein an electric kettle liquid level detection probe comprises an insulating probe housing, a first liquid level detection electrode sheet, a second liquid level detection electrode sheet and a liquid level detection chip; the insulating probe housing is provided with a connector, and the connector is used to fix and install the insulating probe housing in the electric kettle; the first liquid level detection electrode sheet, the second liquid level detection electrode sheet and the liquid level detection chip are respectively installed in the insulating probe housing, and the first liquid level detection electrode sheet and the second liquid level detection electrode sheet are arranged at intervals and in opposite positions; the liquid level detection chip has a first detection pin and a second detection pin, the first detection pin is electrically connected to the first liquid level detection electrode sheet, and the second detection pin is electrically connected to the second liquid level detection electrode sheet. The present invention does not release harmful metal substances, is easy to install, adopts an electrode sheet electromagnetic field detection method, and has high liquid level detection accuracy and high sensitivity.

Description

Technical Field

[0001] The invention relates to the technical field of electric kettle liquid level detection, and in particular to an electric kettle liquid level detection probe and a liquid level detection method using the electric kettle liquid level detection probe. Background Art

[0002] At present, there are two main types of liquid level detection probes and methods for electric kettles: resistive liquid level detection probes and methods and capacitive liquid level detection probes and methods. The resistive liquid level detection device is shown in Chinese Patent 201420061701.1, which is provided with a high and low water level detection unit connected to a power module for detecting high and low water levels in a measuring container and a middle water level detection unit for detecting middle water level in a measuring container; through the action of a mutual inductor, the liquid level of liquids with different resistance ranges can be measured. This resistive liquid level detection device can only test high liquid level, middle liquid level and low liquid level, and cannot achieve linear liquid level detection. It is easy to release harmful substances such as heavy metals, which will be harmful to the human body if used for a long time. The sensitivity and accuracy are not high enough.

[0003] The capacitive liquid level detection device refers to Chinese patent 201910888186.1, which includes a liquid storage container, on which a water level scale is provided; the liquid storage container is provided with a sensing electrode sheet that does not contact the liquid, the sensing electrode sheet is located at different height positions to form a water level scale, and there is a spacing L between the sensing electrode sheet and the inner wall of the liquid storage container, and the spacing L is suitable for the sensing electrode sheet to generate a capacitance value when the liquid reaches the corresponding height position; the capacitive liquid level detection structure also includes a chip module, on which an operating chip is provided, and the operating chip is connected to one or more sensing electrode sheets. This capacitive liquid level detection device can prevent the sensing electrode sheet from contacting the liquid, prevent the release of harmful substances such as heavy metals, and avoid harm to the human body, but it can still only test high liquid level, medium liquid level and low liquid level, and cannot achieve linear liquid level detection, and the sensitivity and accuracy are not high enough; in addition, this capacitive liquid level detection device needs to be assembled in the kettle wall, which is not easy to install. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an electric kettle liquid level detection probe which does not release harmful metal substances, is easy to install, adopts an electrode sheet electromagnetic field detection method, and has high liquid level detection accuracy and high sensitivity based on the above-mentioned deficiencies in the prior art; in view of this, the present invention also provides a liquid level detection method for the electric kettle liquid level detection probe.

[0005] To solve the above technical problems, the first technical solution of the present invention is: an electric kettle liquid level detection probe, comprising an insulating probe shell, a first liquid level detection electrode sheet, a second liquid level detection electrode sheet and a liquid level detection chip; the insulating probe shell is provided with a connecting piece, which is used to fix and install the insulating probe shell in the electric kettle; the first liquid level detection electrode sheet, the second liquid level detection electrode sheet and the liquid level detection chip are respectively installed in the insulating probe shell, and the first liquid level detection electrode sheet and the second liquid level detection electrode sheet are arranged at intervals and opposite to each other; the liquid level detection chip has a first detection pin and a second detection pin, the first detection pin is electrically connected to the first liquid level detection electrode sheet, and the second detection pin is electrically connected to the second liquid level detection electrode sheet.

[0006] Preferably, the liquid level detection chip is an MDC04 chip, the first detection pin is a positive signal detection pin, the second detection pin is a negative signal detection pin, and the liquid level detection chip also has a power access pin and a digital signal output pin; the first liquid level detection electrode sheet is a positive liquid level detection electrode sheet, and the second liquid level detection electrode sheet is a negative liquid level detection electrode sheet.

[0007] Preferably, an electrode sheet insulating bracket is provided inside the insulating probe shell, and electrode sheet mounting grooves are respectively provided on both sides of the electrode sheet insulating bracket, the first liquid level detection electrode sheet is installed in the electrode sheet mounting groove on one side of the electrode sheet insulating bracket, and the second liquid level detection electrode sheet is installed in the electrode sheet mounting groove on the other side of the electrode sheet insulating bracket; the overall shape of the electrode sheet insulating bracket is cylindrical, the electrode sheet mounting groove is an arc groove arranged along the length direction of the electrode sheet insulating bracket, and the two electrode sheet mounting grooves are symmetrical to each other, and the shapes of the first liquid level detection electrode sheet and the second liquid level detection electrode sheet respectively match the shapes of the electrode sheet mounting grooves; the insulating probe shell includes an insulating sleeve, and the electrode sheet insulating bracket is inserted in the insulating sleeve; an upper sealing joint is inserted at the upper end of the insulating sleeve, and a lower sealing joint is inserted at the lower end of the insulating sleeve.

[0008] Preferably, the electrode sheet insulating bracket is axially provided with a middle hole, and the connecting piece includes a connecting rod and a connecting cap, the connecting rod is passed through the middle hole, the connecting cap is fixed to the upper end of the connecting rod and fastens the upper sealing joint, and the lower end of the connecting rod is a threaded rod, which is used to be screwed to the bottom of the electric kettle.

[0009] The liquid level detection method of the electric kettle liquid level detection probe in the first technical solution of the present invention comprises the following detection steps:

[0010] S1. The electric kettle is powered on, and the liquid level detection chip of the detection probe forms a detection electromagnetic field between the first liquid level detection electrode sheet and the second liquid level detection electrode sheet. When there is no liquid in the electric kettle, the electromagnetic field is an electromagnetic field of fixed strength;

[0011] S2. The liquid in the electric kettle rises and falls. Due to the difference in dielectric constant between liquid and air, the charged ions in the liquid can pass through the detection electromagnetic field, thus enhancing the detection electromagnetic field. During the process of liquid level rising, the charged ions increase, and the detection electromagnetic field increases with the increase of liquid level. During the process of liquid level falling, the charged ions decrease, and the detection electromagnetic field weakens with the decrease of liquid level.

[0012] S4. The liquid level detection chip of the detection probe detects the enhanced signal or weakened signal of the detection electromagnetic field, calculates the liquid level change, and converts it into a digital signal and outputs it to the MCU control chip of the electric kettle, thereby realizing continuous liquid level detection of the electric kettle.

[0013] Preferably, the liquid level detection chip inputs a carrier signal of a specific frequency to the first liquid level detection electrode sheet and the second liquid level detection electrode sheet.

[0014] Preferably, the enhanced signal and weakened signal of the detection electromagnetic field detected by the liquid level detection chip are respectively induced current signals, the enhanced signal is a signal of increased induced current, and the weakened signal is a signal of weakened induced current.

[0015] In order to solve the above technical problems, the second technical solution of the present invention is: an electric kettle liquid level detection probe, comprising an insulating probe shell, at least three groups of detection electrode sheet groups and a liquid level detection chip, the at least three groups of detection electrode sheet groups are arranged in sequence from top to bottom, each group of detection electrode sheet groups respectively includes a first liquid level detection electrode sheet and a second liquid level detection electrode sheet, and the first liquid level detection electrode sheet and the second liquid level detection electrode sheet of each group of detection electrode sheet groups are arranged at intervals and opposite to each other; the insulating probe shell is provided with a connecting piece, which is used to fix and install the insulating probe shell in the electric kettle; the liquid level detection chip and the first liquid level detection electrode sheet and the second liquid level detection electrode sheet of each group of detection electrode sheet groups are respectively installed in the insulating probe shell; the liquid level detection chip has a first detection pin and a second detection pin, the first detection pin is electrically connected to the first liquid level detection electrode sheet of each group of detection electrode sheet groups, and the second detection pin is electrically connected to the second liquid level detection electrode sheet of each group of detection electrode sheet groups.

[0016] Preferably, the liquid level detection chip is an MDC04 chip, the first detection pin is a positive signal detection pin, the second detection pin is a negative signal detection pin, and the liquid level detection chip also has a power access pin and a digital signal output pin; the first liquid level detection electrode sheet is a positive liquid level detection electrode sheet, and the second liquid level detection electrode sheet is a negative liquid level detection electrode sheet.

[0017] The liquid level detection method of the electric kettle liquid level detection probe in the second technical solution of the present invention comprises the following detection steps:

[0018] S1. The electric kettle is powered on, and the liquid level detection chip of the detection probe forms a detection electromagnetic field between the first liquid level detection electrode sheet and the second liquid level detection electrode sheet of each detection electrode sheet group. When there is no liquid in the electric kettle, the detection electromagnetic field of each detection electrode sheet group is an electromagnetic field of fixed intensity;

[0019] S2. The liquid in the electric kettle rises and falls. Due to the difference in dielectric constant between liquid and air, the charged ions in the liquid can pass through the detection electromagnetic field, thus enhancing the detection electromagnetic field. During the process of liquid level rising, when liquid appears around any group of detection electrode sheets, the charged ions around the group of detection electrode sheets increase, thereby enhancing the detection electromagnetic field of the group of detection electrode sheets. During the process of liquid level falling, when liquid disappears around any group of detection electrode sheets, the charged ions around the group of detection electrode sheets decrease, thereby weakening the detection electromagnetic field of the group of detection electrode sheets.

[0020] S4. The liquid level detection chip of the detection probe detects the enhanced signal or weakened signal of the detection electromagnetic field of each group of detection electrode groups, calculates the position of which group of detection electrode groups the liquid level is located, and converts it into a digital signal and outputs it to the MCU control chip of the electric kettle to realize the liquid level detection of the electric kettle.

[0021] The beneficial effects of the present invention are: first, the electric kettle liquid level detection probe of the present invention has an insulating probe shell, the electrode sheet does not contact the liquid, and does not release harmful metal substances into the liquid; second, the present invention is provided with a first liquid level detection electrode sheet, a second liquid level detection electrode sheet and a liquid level detection chip, the liquid level detection chip of the detection probe can form a detection electromagnetic field through the first liquid level detection electrode sheet and the second liquid level detection electrode sheet, and can calculate the height of the liquid level in real time through the strength changes of the detection electromagnetic field caused by charged ions in the liquid, thereby accurately and continuously performing liquid level detection; third, the insulating probe shell of the present invention is provided with a connecting piece, which can fix and install the insulating probe shell in the electric kettle, making the probe easy to install. In addition, in the preferred embodiment of the present invention, the liquid level detection chip adopts the MDC04 chip, which can utilize the difference in dielectric constants of different materials to realize liquid level sensing by amplifying, digitally converting, and compensating for small changes in capacitance; the first liquid level detection electrode sheet is a positive liquid level detection electrode sheet, and the second liquid level detection electrode sheet is a negative liquid level detection electrode sheet, and an electrode sheet insulating bracket is provided in the insulating probe housing, the first liquid level detection electrode sheet is installed in the electrode sheet mounting groove on one side of the electrode sheet insulating bracket, and the second liquid level detection electrode sheet is installed in the electrode sheet mounting groove on the other side of the electrode sheet insulating bracket, so that the first liquid level detection electrode sheet and the second liquid level detection electrode sheet are stably installed in the insulating housing, and a stable electromagnetic field can be formed between the first liquid level detection electrode sheet and the second liquid level detection electrode sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the external structure of the electric kettle liquid level detection probe in Example 1.

[0023] Figure 2 This is a schematic diagram of the dispersed structure of the electric kettle liquid level detection probe in Example 1.

[0024] Figure 3 It is a schematic diagram of the longitudinal cross-section structure of the electric kettle liquid level detection probe in Example 1.

[0025] Figure 4 It is a schematic diagram of the electrical connection of the first liquid level detection electrode sheet, the second liquid level detection electrode sheet and the liquid level detection chip.

[0026] Figure 5 This is a schematic diagram of the external structure of the electric kettle liquid level detection probe in Example 2.

[0027] Figure 6 This is a schematic diagram of the dispersed structure of the electric kettle liquid level detection probe in Example 2.

[0028] Figure 7 This is a schematic diagram of the external structure of the electric kettle liquid level detection probe in the fourth embodiment.

[0029] Figure 8 This is a schematic diagram of the dispersed structure of the electric kettle liquid level detection probe in the fourth embodiment.

[0030] In the figure: 1. Insulating probe housing; 11. Insulating sleeve; 12. Upper sealing joint; 13. Lower sealing joint; 2. First liquid level detection electrode sheet; 3. Second liquid level detection electrode sheet; 4. Liquid level detection chip; 5. Connecting piece; 51. Connecting rod; 52. Connecting cap; 53. Threaded rod; 6. Electrode sheet insulating bracket; 61. Electrode sheet mounting groove; 62. Middle hole; 7. Fastener; 100. Detection electrode sheet group. DETAILED DESCRIPTION

[0031] The structural principle and working principle of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0032] Embodiment 1

[0033] like Figure 1-Figure 3 As shown, and combined with reference Figure 4 The present invention is a liquid level detection probe for an electric kettle, comprising an insulating probe housing 1, a first liquid level detection electrode sheet 2, a second liquid level detection electrode sheet 3 and a liquid level detection chip 4; the insulating probe housing 1 is provided with a connector 5, and the connector 5 is used to fix and install the insulating probe housing 1 in the electric kettle (not shown in the figure); the first liquid level detection electrode sheet 2, the second liquid level detection electrode sheet 3 and the liquid level detection chip 4 are respectively installed in the insulating probe housing 1, and the first liquid level detection electrode sheet 2 and the second liquid level detection electrode sheet 3 are arranged at intervals and opposite to each other; the liquid level detection chip 4 has a first detection pin C+ and a second detection pin C-, the first detection pin C+ is electrically connected to the first liquid level detection electrode sheet 2, and the second detection pin C- is electrically connected to the second liquid level detection electrode sheet 3.

[0034] The liquid level detection chip 4 of the present invention is an MDC04 chip, the first detection pin C+ is a positive signal detection pin, the second detection pin C- is a negative signal detection pin, and the liquid level detection chip 4 also has a power access pin VCC and a digital signal output pin Vout; the first liquid level detection electrode sheet 2 is a positive liquid level detection electrode sheet, and the second liquid level detection electrode sheet 3 is a negative liquid level detection electrode sheet. The MDC04 chip can utilize the difference in dielectric constants of different materials to achieve liquid level sensing by amplifying, digitally converting, and compensating for small changes in capacitance. The first liquid level detection electrode sheet 2 and the second liquid level detection electrode sheet 3 are symmetrically arranged, and a stable electromagnetic field can be formed between the two electrode sheets.

[0035] like Figure 1-Figure 3As shown, an electrode sheet insulating bracket 6 is provided inside the insulating probe housing 1, and electrode sheet mounting grooves 61 are provided on both sides of the electrode sheet insulating bracket 6, respectively. The first liquid level detection electrode sheet 2 is installed in the electrode sheet mounting groove 61 on one side of the electrode sheet insulating bracket 6, and the second liquid level detection electrode sheet 3 is installed in the electrode sheet mounting groove 61 on the other side of the electrode sheet insulating bracket 6; in this way, the first liquid level detection electrode sheet and the second liquid level detection electrode sheet are stably installed inside the insulating housing. The overall shape of the electrode sheet insulating bracket 6 is cylindrical, and the electrode sheet mounting groove 61 is an arc groove arranged along the length direction of the electrode sheet insulating bracket 6, and the two electrode sheet mounting grooves 61 are symmetrical to each other, and the shapes of the first liquid level detection electrode sheet 2 and the second liquid level detection electrode sheet 3 are matched with the shapes of the electrode sheet mounting groove 61. The insulating probe housing 1 includes an insulating sleeve 11, and the electrode sheet insulating bracket 6 is inserted into the insulating sleeve 11; an upper sealing joint 12 is inserted at the upper end of the insulating sleeve 11, and a lower sealing joint 13 is inserted at the lower end of the insulating sleeve 11. The electrode sheet insulating bracket 6 is axially provided with a middle hole 62, and the connecting member 5 includes a connecting rod 51 and a connecting cap 52. The connecting rod 51 is inserted into the middle hole 62, and the connecting cap 52 is fixed to the upper end of the connecting rod 51 and fastens the upper sealing joint 12. The lower end of the connecting rod 51 is a threaded rod 53, and the threaded rod 53 is used to be screwed to the bottom of the electric kettle. The lower end of the lower sealing joint 13 is also provided with a fastener 7.

[0036] Embodiment 2

[0037] like Figure 5-Figure 6 As shown, and combined with reference Figure 4 The present invention is a liquid level detection probe for an electric kettle, comprising an insulating probe housing 1, a first liquid level detection electrode sheet 2, a second liquid level detection electrode sheet 3 and a liquid level detection chip 4; the insulating probe housing 1 is provided with a connector 5, and the connector 5 is used to fix and install the insulating probe housing 1 in the electric kettle (not shown in the figure); the first liquid level detection electrode sheet 2, the second liquid level detection electrode sheet 3 and the liquid level detection chip 4 are respectively installed in the insulating probe housing 1, and the first liquid level detection electrode sheet 2 and the second liquid level detection electrode sheet 3 are arranged at intervals and opposite to each other; the liquid level detection chip 4 has a first detection pin C+ and a second detection pin C-, the first detection pin C+ is electrically connected to the first liquid level detection electrode sheet 2, and the second detection pin C- is electrically connected to the second liquid level detection electrode sheet 3.

[0038] The liquid level detection chip 4 of the present invention is an MDC04 chip, the first detection pin C+ is a positive signal detection pin, the second detection pin C- is a negative signal detection pin, and the liquid level detection chip 4 also has a power access pin VCC and a digital signal output pin Vout; the first liquid level detection electrode sheet 2 is a positive liquid level detection electrode sheet, and the second liquid level detection electrode sheet 3 is a negative liquid level detection electrode sheet. The MDC04 chip can utilize the difference in dielectric constants of different materials to achieve liquid level sensing by amplifying, digitally converting, and compensating for small changes in capacitance. The first liquid level detection electrode sheet 2 and the second liquid level detection electrode sheet 3 are symmetrically arranged, and a stable electromagnetic field can be formed between the two electrode sheets.

[0039] Embodiment 3

[0040] The content of this embodiment is the liquid level detection method of the electric kettle liquid level detection probe described in Embodiment 1 and Embodiment 2, including the following detection steps:

[0041] S1. The electric kettle is powered on, and the liquid level detection chip of the detection probe forms a detection electromagnetic field between the first liquid level detection electrode sheet and the second liquid level detection electrode sheet. When there is no liquid in the electric kettle, the detection electromagnetic field is an electromagnetic field of fixed intensity;

[0042] S2. The liquid in the electric kettle rises and falls. Due to the difference in dielectric constant between liquid and air, the charged ions in the liquid can pass through the detection electromagnetic field, thus enhancing the detection electromagnetic field. During the process of liquid level rising, the charged ions increase, and the detection electromagnetic field increases with the increase of liquid level. During the process of liquid level falling, the charged ions decrease, and the detection electromagnetic field weakens with the decrease of liquid level.

[0043] S4. The liquid level detection chip of the detection probe detects the enhanced signal or weakened signal of the detection electromagnetic field, calculates the liquid level change, and converts it into a digital signal and outputs it to the electric kettle MCU control chip (not shown in the figure), thereby realizing continuous liquid level detection of the electric kettle.

[0044] The liquid level detection chip of the present invention inputs a carrier signal of a specific frequency to the first liquid level detection electrode sheet 2 and the second liquid level detection electrode sheet 3. The liquid level detection chip 4 detects the enhanced signal and the weakened signal of the electromagnetic field, which are induced current signals, respectively. The enhanced signal is a signal of increased induced current, and the weakened signal is a signal of weakened induced current.

[0045] Embodiment 4

[0046] like Figure 7-Figure 8 As shown, and combined with reference Figure 4The present invention is a liquid level detection probe for an electric kettle, comprising an insulating probe housing 1, at least three detection electrode sheet groups 100 and a liquid level detection chip 4, wherein four detection electrode sheet groups 100 are shown in the figure, wherein the at least three detection electrode sheet groups 100 are arranged in sequence from top to bottom, wherein each detection electrode sheet group 100 comprises a first liquid level detection electrode sheet 2 and a second liquid level detection electrode sheet 3, wherein the first liquid level detection electrode sheet 2 and the second liquid level detection electrode sheet 3 of each detection electrode sheet group 100 are arranged at intervals and opposite to each other; the insulating probe housing 1 is provided with a connecting piece 5, wherein the connecting piece 5 is used to fix and install the insulating probe housing 1 in the electric kettle (not shown in the figure); The liquid level detection chip 4 and the first liquid level detection electrode sheet 2 and the second liquid level detection electrode sheet 3 of each group of detection electrode sheet groups 100 are respectively installed in the insulating probe housing 1; the liquid level detection chip 4 has a first detection pin C+ and a second detection pin C-, the first detection pin C+ is electrically connected to the first liquid level detection electrode sheet 2 of each group of detection electrode sheet groups 100, and the second detection pin C- is electrically connected to the second liquid level detection electrode sheet 3 of each group of detection electrode sheet groups 100.

[0047] The liquid level detection chip 4 of the present invention is an MDC04 chip, the first detection pin C+ is a positive signal detection pin, the second detection pin C- is a negative signal detection pin, and the liquid level detection chip 4 also has a power access pin VCC and a digital signal output pin Vout; the first liquid level detection electrode sheet 2 is a positive liquid level detection electrode sheet, and the second liquid level detection electrode sheet 3 is a negative liquid level detection electrode sheet. The MDC04 chip can utilize the difference in dielectric constants of different materials to achieve liquid level sensing by amplifying, digitally converting, and compensating for small changes in capacitance. The first liquid level detection electrode sheet 2 and the second liquid level detection electrode sheet 3 are symmetrically arranged, and a stable electromagnetic field can be formed between the two electrode sheets.

[0048] Embodiment 5

[0049] The content of this embodiment is the liquid level detection method of the electric kettle liquid level detection probe described in the fourth embodiment, including the following detection steps:

[0050] S1. The electric kettle is powered on, and the liquid level detection chip of the detection probe forms a detection electromagnetic field between the first liquid level detection electrode sheet and the second liquid level detection electrode sheet of each detection electrode sheet group. When there is no liquid in the electric kettle, the detection electromagnetic field of each detection electrode sheet group is an electromagnetic field of fixed intensity;

[0051] S2. The liquid in the electric kettle rises and falls. Due to the difference in dielectric constant between liquid and air, the charged ions in the liquid can pass through the detection electromagnetic field, thus enhancing the detection electromagnetic field. During the process of liquid level rising, when liquid appears around any group of detection electrode sheets, the charged ions around the group of detection electrode sheets increase, thereby enhancing the detection electromagnetic field of the group of detection electrode sheets. During the process of liquid level falling, when liquid disappears around any group of detection electrode sheets, the charged ions around the group of detection electrode sheets decrease, thereby weakening the detection electromagnetic field of the group of detection electrode sheets.

[0052] S4. The liquid level detection chip of the detection probe detects the enhanced signal or weakened signal of the detection electromagnetic field of each group of detection electrode groups, calculates the position of which group of detection electrode groups the liquid level is located, and converts it into a digital signal and outputs it to the MCU control chip of the electric kettle to realize the liquid level detection of the electric kettle.

[0053] The liquid level detection chip of the present invention inputs a carrier signal of a specific frequency to the first liquid level detection electrode sheet 2 and the second liquid level detection electrode sheet 3. The liquid level detection chip 4 detects the enhanced signal and the weakened signal of the electromagnetic field, which are induced current signals, respectively. The enhanced signal is a signal of increased induced current, and the weakened signal is a signal of weakened induced current.

[0054] The above description is only a preferred embodiment of the present invention. Any slight modification, equivalent changes and modifications made to the above embodiments according to the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A liquid level detection probe for an electric kettle, characterized in that: It comprises an insulating probe housing, a first liquid level detection electrode sheet, a second liquid level detection electrode sheet and a liquid level detection chip; the insulating probe housing is provided with a connector, which is used to fix and install the insulating probe housing in the electric kettle; the first liquid level detection electrode sheet, the second liquid level detection electrode sheet and the liquid level detection chip are respectively installed in the insulating probe housing, and the first liquid level detection electrode sheet and the second liquid level detection electrode sheet are arranged at intervals and opposite to each other; the liquid level detection chip has a first detection pin and a second detection pin, the first detection pin is electrically connected to the first liquid level detection electrode sheet, and the second detection pin is electrically connected to the second liquid level detection electrode sheet; The liquid level detection method of the electric kettle liquid level detection probe comprises the following detection steps: S1. The electric kettle is powered on, and the liquid level detection chip of the detection probe forms a detection electromagnetic field between the first liquid level detection electrode sheet and the second liquid level detection electrode sheet. When there is no liquid in the electric kettle, the electromagnetic field is an electromagnetic field of fixed strength; S2. The liquid in the electric kettle rises and falls. Due to the difference in dielectric constant between liquid and air, the charged ions in the liquid can pass through the detection electromagnetic field, thus enhancing the detection electromagnetic field. During the process of liquid level rising, the charged ions increase, and the detection electromagnetic field increases with the increase of liquid level. During the process of liquid level falling, the charged ions decrease, and the detection electromagnetic field weakens with the decrease of liquid level. S4. The liquid level detection chip of the detection probe detects the enhanced signal or weakened signal of the detection electromagnetic field, calculates the liquid level change, and converts it into a digital signal and outputs it to the MCU control chip of the electric kettle, thereby realizing continuous liquid level detection of the electric kettle.

2. The electric kettle liquid level detection probe according to claim 1, characterized in that: The liquid level detection chip is an MDC04 chip, the first detection pin is a positive signal detection pin, the second detection pin is a negative signal detection pin, and the liquid level detection chip also has a power access pin and a digital signal output pin; the first liquid level detection electrode sheet is a positive liquid level detection electrode sheet, and the second liquid level detection electrode sheet is a negative liquid level detection electrode sheet.

3. The electric kettle liquid level detection probe according to claim 1, characterized in that: An electrode sheet insulating bracket is provided inside the insulating probe shell, and electrode sheet mounting grooves are respectively provided on both sides of the electrode sheet insulating bracket, the first liquid level detection electrode sheet is installed in the electrode sheet mounting groove on one side of the electrode sheet insulating bracket, and the second liquid level detection electrode sheet is installed in the electrode sheet mounting groove on the other side of the electrode sheet insulating bracket; the overall shape of the electrode sheet insulating bracket is cylindrical, the electrode sheet mounting groove is an arc groove arranged along the length direction of the electrode sheet insulating bracket, and the two electrode sheet mounting grooves are symmetrical to each other, and the shapes of the first liquid level detection electrode sheet and the second liquid level detection electrode sheet respectively match the shapes of the electrode sheet mounting grooves; the insulating probe shell includes an insulating sleeve, and the electrode sheet insulating bracket is inserted in the insulating sleeve; an upper sealing joint is inserted at the upper end of the insulating sleeve, and a lower sealing joint is inserted at the lower end of the insulating sleeve.

4. The electric kettle liquid level detection probe according to claim 3, characterized in that: The electrode sheet insulating bracket is axially provided with a middle hole, and the connecting piece includes a connecting rod and a connecting cap. The connecting rod is passed through the middle hole, the connecting cap is fixed to the upper end of the connecting rod and fastens the upper sealing joint, and the lower end of the connecting rod is a threaded rod, which is used to be screwed to the bottom of the electric kettle.

5. The electric kettle liquid level detection probe according to claim 1, characterized in that: The liquid level detection chip inputs a carrier signal of a specific frequency to the first liquid level detection electrode sheet and the second liquid level detection electrode sheet.

6. The electric kettle liquid level detection probe according to claim 1, characterized in that: The liquid level detection chip detects that the enhanced signal and the weakened signal of the detection electromagnetic field are respectively induced current signals, the enhanced signal is a signal of increased induced current, and the weakened signal is a signal of weakened induced current.

7. An electric kettle liquid level detection probe, characterized in that: It comprises an insulating probe shell, at least three groups of detection electrode sheets and a liquid level detection chip, wherein the at least three groups of detection electrode sheets are arranged in order from top to bottom, each group of detection electrode sheets respectively comprises a first liquid level detection electrode sheet and a second liquid level detection electrode sheet, and the first liquid level detection electrode sheet and the second liquid level detection electrode sheet of each group of detection electrode sheets are arranged at intervals and opposite to each other; the insulating probe shell is provided with a connector, which is used to fix and install the insulating probe shell in the electric kettle; the liquid level detection chip and the first liquid level detection electrode sheet and the second liquid level detection electrode sheet of each group of detection electrode sheets are respectively installed in the insulating probe shell; the liquid level detection chip has a first detection pin and a second detection pin, the first detection pin is electrically connected to the first liquid level detection electrode sheet of each group of detection electrode sheets, and the second detection pin is electrically connected to the second liquid level detection electrode sheet of each group of detection electrode sheets; The liquid level detection method of the electric kettle liquid level detection probe comprises the following detection steps: S1. The electric kettle is powered on, and the liquid level detection chip of the detection probe forms a detection electromagnetic field between the first liquid level detection electrode sheet and the second liquid level detection electrode sheet of each detection electrode sheet group. When there is no liquid in the electric kettle, the detection electromagnetic field of each detection electrode sheet group is an electromagnetic field of fixed intensity; S2. The liquid in the electric kettle rises and falls. Due to the difference in dielectric constant between liquid and air, the charged ions in the liquid can pass through the detection electromagnetic field, thus enhancing the detection electromagnetic field. During the process of liquid level rising, when liquid appears around any group of detection electrode sheets, the charged ions around the group of detection electrode sheets increase, thereby enhancing the detection electromagnetic field of the group of detection electrode sheets. During the process of liquid level falling, when liquid disappears around any group of detection electrode sheets, the charged ions around the group of detection electrode sheets decrease, thereby weakening the detection electromagnetic field of the group of detection electrode sheets. S4. The liquid level detection chip of the detection probe detects the enhanced signal or weakened signal of the detection electromagnetic field of each group of detection electrode groups, calculates the position of which group of detection electrode groups the liquid level is located, and converts it into a digital signal and outputs it to the MCU control chip of the electric kettle to realize the liquid level detection of the electric kettle.

8. The electric kettle liquid level detection probe according to claim 7, characterized in that: The liquid level detection chip is an MDC04 chip, the first detection pin is a positive signal detection pin, the second detection pin is a negative signal detection pin, and the liquid level detection chip also has a power access pin and a digital signal output pin; the first liquid level detection electrode sheet is a positive liquid level detection electrode sheet, and the second liquid level detection electrode sheet is a negative liquid level detection electrode sheet.

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