Liquid detection device and liquid detection method for electric kettle

Abstract

The present invention discloses a liquid detection device and a liquid detection method for an electric kettle, wherein the liquid detection device for the electric kettle comprises a main control IC module, an ionization generator, an ionization detector, a cathode ionization rod, a first anode ionization rod and a second anode ionization rod; the main control IC module is electrically connected to the ionization generator and the ionization detector respectively, the ionization generator is electrically connected to the cathode ionization rod, the first anode ionization rod and the second anode ionization rod respectively, and the ionization detector is electrically connected to the first anode ionization rod and the second anode ionization rod respectively. The present invention forms a voltage difference between the cathode ionization rod and the anode ionization rod through the ionization generator, so that the liquid between the cathode ionization rod and the anode ionization rod undergoes an ionization reaction, and detects the transient current generated by the ionization reaction between the cathode ionization rod and the anode ionization rod through the ionization detector, feeds back the information of the ionization reaction to the main control IC module, and then detects the liquid, and the accuracy and sensitivity are high.

Description

Technical Field

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

[0002] The purpose of the liquid detection of the electric kettle is to detect whether there is liquid at a certain height position in the electric kettle, so as to realize automatic control such as adding water and stopping adding water. In the prior art, the liquid detection of the electric kettle and the liquid level detection are basically the same concept. There are mainly two types of liquid detection probes and methods for the electric kettle: resistive liquid level detection probes and methods and capacitive liquid 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 the middle water level in a measuring container; through the action of the mutual inductor, the liquid level of liquids with different resistance ranges can be measured. 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 heights 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 capacitance value that the sensing electrode sheet can generate 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. However, in actual use, the liquid detection probes of these two electric kettles still have problems of insufficient accuracy and sensitivity. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a new type of liquid detection device for an electric kettle based on the above-mentioned deficiencies of the prior art, which uses an ionization generator to form a voltage difference between the cathode ionization rod and the anode ionization rod, so that the liquid between the cathode ionization rod and the anode ionization rod will undergo an ionization reaction, and the transient current generated by the ionization reaction between the cathode ionization rod and the anode ionization rod is detected by an ionization detector, and the information of the ionization reaction is fed back to the main control IC module, thereby detecting the liquid. Compared with traditional liquid detection methods, this method has high accuracy and sensitivity. In view of this, the present invention also provides a liquid detection method using the liquid detection device of an electric kettle

[0004] To solve the above-mentioned first technical problem, the technical solution of the present invention is: a liquid detection device for an electric kettle, comprising a main control IC module, an ionization generator, an ionization detector, a cathode ionization rod, a first anode ionization rod and a second anode ionization rod; the main control IC module is electrically connected to the ionization generator and the ionization detector, respectively, the ionization generator is electrically connected to the cathode ionization rod, the first anode ionization rod and the second anode ionization rod, respectively, and the ionization detector is electrically connected to the first anode ionization rod and the second anode ionization rod, respectively.

[0005] Preferably, the structure of the cathode ionization rod is a vertical hollow rod structure, the cathode ionization rod has a central hole, an insulating cross bar is provided above the cathode ionization rod, the middle part of the insulating cross bar is connected to the top of the cathode ionization rod, the upper end of the first anode ionization rod is connected to one end of the insulating cross bar, and the upper end of the second anode ionization rod is connected to the other end of the insulating cross bar.

[0006] Preferably, the liquid detection device of the electric kettle further comprises an anode wire, a cathode wire, and a wire ring; there are two anode wires, and after the two anode wires pass through the middle hole of the cathode ionization rod from bottom to top, one anode wire is connected to the first anode ionization rod, and the other anode wire is connected to the second anode ionization rod; the wire ring is sleeved outside the lower end of the cathode ionization rod, and the cathode wire is connected to the wire ring.

[0007] Preferably, the cathode ionization rod, the first anode ionization rod and the second anode ionization rod are parallel to each other, and the length of the first anode ionization rod is longer than that of the second anode ionization rod.

[0008] In order to solve the above second technical problem, the technical solution of the present invention is: the liquid detection method of the liquid detection device of the electric kettle comprises the following steps:

[0009] S1. The main control IC module controls the ionization generator to form a positive and negative pressure difference between the cathode ionization rod and the first anode ionization rod, and also to form a positive and negative pressure difference between the cathode ionization rod and the second anode ionization rod;

[0010] S2-1. Step of detecting whether there is liquid between the cathode ionization rod and the first anode ionization rod:

[0011] a. When there is liquid between the cathode ionization rod and the first anode ionization rod, the liquid between the cathode ionization rod and the first anode ionization rod will undergo an ionization reaction, large charged ions will gather near the cathode ionization rod and the first anode ionization rod, and a transient current will be generated between the cathode ionization rod and the first anode ionization rod;

[0012] b. The ionization detector detects the transient current generated by the ionization reaction between the cathode ionization rod and the first anode ionization rod, and feeds back the information of the ionization reaction to the main control IC module;

[0013] c. The main control IC module determines that there is liquid between the cathode ionization rod and the first anode ionization rod;

[0014] S2-2. Step of detecting whether there is liquid between the cathode ionization rod and the second anode ionization rod:

[0015] a. When there is liquid between the cathode ionization rod and the first anode ionization rod, the liquid between the cathode ionization rod and the first anode ionization rod will undergo an ionization reaction, a large number of charged ions will gather near the cathode ionization rod and the first anode ionization rod, and a transient current will be generated between the cathode ionization rod and the second anode ionization rod;

[0016] b. The ionization detector detects the transient current generated by the ionization reaction between the cathode ionization rod and the second anode ionization rod, and feeds back the information of the ionization reaction to the main control IC module;

[0017] c. The main control IC module determines that there is liquid between the cathode ionization rod and the second anode ionization rod.

[0018] Preferably, in the above step S1, the main control IC module forms a positive and negative pressure difference between the cathode ionization rod and the first anode ionization rod, and also forms a positive and negative pressure difference between the cathode ionization rod and the second anode ionization rod by setting a complementary PWM signal of frequency.

[0019] Preferably, in step a of the above step S2-1, the charged ions produced by the ionization reaction of the liquid increase the positive and negative pressure difference between the cathode ionization rod and the first anode ionization rod; in step a of the above step S2-2, the charged ions produced by the ionization reaction of the liquid increase the positive and negative pressure difference between the cathode ionization rod and the second anode ionization rod.

[0020] Preferably, the ionization detector is provided with a signal amplifier to amplify the information of the ionization reaction and then feed it back to the main control IC module.

[0021] The beneficial effects of the present invention are as follows: the present invention is a novel liquid detection device and liquid detection method for an electric kettle, which uses an ionization generator to form a voltage difference between a cathode ionization rod and an anode ionization rod, so that the liquid between the cathode ionization rod and the anode ionization rod will undergo an ionization reaction, and an ionization detector detects the transient current generated by the ionization reaction between the cathode ionization rod and the anode ionization rod, and feeds back the information of the ionization reaction to a main control IC module, thereby detecting the liquid. Compared with traditional liquid detection methods, this method has high accuracy and high sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure is a schematic diagram of the block structure of the liquid detection device of the electric kettle.

[0023] Figure 2 This is a schematic diagram of the overall structure of the electric kettle liquid detection probe.

[0024] Figure 3 Schematic diagram of the dispersed structure of the electric kettle liquid detection probe.

[0025] In the figure: 1. main control IC module; 2. ionization generator; 3. ionization detector; 4. cathode ionization rod; 41. middle hole; 5. first anode ionization rod; 6. second anode ionization rod; 8. insulating cross bar; 9. anode wire; 10. cathode wire; 11. wire ring; 12. connection assembly. DETAILED DESCRIPTION

[0026] The structural principle and working principle of the present invention are further described in detail below with reference to the accompanying drawings.

[0027] Embodiment 1

[0028] like Figure 1-Figure 3 As shown, the present invention is a liquid detection device for an electric kettle, comprising a main control IC module 1, an ionization generator 2, an ionization detector 3, a cathode ionization rod 4, a first anode ionization rod 5, and a second anode ionization rod 6; the main control IC module 1 is electrically connected to the ionization generator 2 and the ionization detector 3 respectively, the ionization generator 2 is electrically connected to the cathode ionization rod 4, the first anode ionization rod 5, and the second anode ionization rod 6 respectively, and the ionization detector 3 is electrically connected to the first anode ionization rod 5 and the second anode ionization rod 6 respectively. The main control IC module 1, the ionization generator 2, and the ionization detector 3 are installed in the control panel of the electric kettle, and the cathode ionization rod 4, the first anode ionization rod 5, and the second anode ionization rod 6 are installed on the liquid detection probe. The ionization generator is used to form a positive and negative pressure difference between the cathode ionization rod and the first anode ionization rod, and also to form a positive and negative pressure difference between the cathode ionization rod and the second anode ionization rod; the ionization detector is used to detect the transient current generated by the ionization reaction between the cathode ionization rod and the first anode ionization rod and / or the second anode ionization rod, and feed back the information of the ionization reaction to the main control IC module.

[0029] like Figure 1-Figure 3As shown, the structure of the cathode ionization rod 4 is a vertical hollow rod structure, the cathode ionization rod 4 has a middle hole 41, an insulating cross bar 8 is arranged above the cathode ionization rod 4, the middle of the insulating cross bar 5 is connected to the top of the cathode ionization rod 4, the upper end of the first anode ionization rod 5 is connected to one end of the insulating cross bar 8, and the upper end of the second anode ionization rod 6 is connected to the other end of the insulating cross bar 8. The liquid detection device of the electric kettle also includes an anode wire 9, a cathode wire 10, and a wire ring 11; the anode wire 9 has two, and after the two anode wires 9 pass through the middle hole 41 of the cathode ionization rod 4 from bottom to top, one anode wire 9 is connected to the first anode ionization rod 5, and the other anode wire 9 is connected to the second anode ionization rod 6; the wire ring is sleeved outside the lower end of the cathode ionization rod, and the cathode wire is connected to the wire ring. The cathode ionization rod 4, the first anode ionization rod 5 and the second anode ionization rod 6 are parallel to each other, and the length of the first anode ionization rod 5 is longer than the length of the second anode ionization rod 6. The lower end of the cathode ionization rod 4 is provided with a connecting assembly 12 for fixing and installing the cathode ionization rod 4 in an electric kettle (not shown in the figure). The chip of the main control IC module 1 is an ESP32 chip.

[0030] Embodiment 2

[0031] The liquid detection method of the liquid detection device of the electric kettle of the present invention comprises the following steps:

[0032] S1. The main control IC module controls the ionization generator to form a positive and negative pressure difference between the cathode ionization rod and the first anode ionization rod, and also to form a positive and negative pressure difference between the cathode ionization rod and the second anode ionization rod;

[0033] S2-1. Step of detecting whether there is liquid between the cathode ionization rod and the first anode ionization rod:

[0034] a. Due to the presence of a large amount of metal ions and water in the liquid, when there is liquid between the cathode ionization rod and the first anode ionization rod, the liquid between the cathode ionization rod and the first anode ionization rod will undergo an ionization reaction, large charged ions will gather near the cathode ionization rod and the first anode ionization rod, and a transient current will be generated between the cathode ionization rod and the first anode ionization rod;

[0035] b. The ionization detector detects the transient current generated by the ionization reaction between the cathode ionization rod and the first anode ionization rod, and feeds back the information of the ionization reaction to the main control IC module;

[0036] c. The main control IC module determines that there is liquid between the cathode ionization rod and the first anode ionization rod;

[0037] S2-2. Step of detecting whether there is liquid between the cathode ionization rod and the second anode ionization rod:

[0038] a. Due to the presence of a large amount of metal ions and water in the liquid, when there is liquid between the cathode ionization rod and the first anode ionization rod, the liquid between the cathode ionization rod and the first anode ionization rod will undergo an ionization reaction, a large amount of charged ions will gather near the cathode ionization rod and the first anode ionization rod, and a transient current will be generated between the cathode ionization rod and the second anode ionization rod;

[0039] b. The ionization detector detects the transient current generated by the ionization reaction between the cathode ionization rod and the second anode ionization rod, and feeds back the information of the ionization reaction to the main control IC module;

[0040] c. The main control IC module determines that there is liquid between the cathode ionization rod and the second anode ionization rod.

[0041] In the above step S1, the main control IC module forms a positive and negative pressure difference between the cathode ionization rod and the first anode ionization rod, and also forms a positive and negative pressure difference between the cathode ionization rod and the second anode ionization rod by setting a complementary PWM signal of frequency.

[0042] In step a of the above step S2-1, the charged ions generated by the ionization reaction of the liquid increase the positive and negative pressure difference between the cathode ionization rod and the first anode ionization rod; in step a of the above step S2-2, the charged ions generated by the ionization reaction of the liquid increase the positive and negative pressure difference between the cathode ionization rod and the second anode ionization rod.

[0043] The ionization detector is provided with a signal amplifier to amplify the information of the ionization reaction and then feed it back to the main control IC module.

[0044] The present invention uses an ionization generator to form a voltage difference between the cathode ionization rod and the anode ionization rod, so that the liquid between the cathode ionization rod and the anode ionization rod will undergo an ionization reaction, and the transient current generated by the ionization reaction between the cathode ionization rod and the anode ionization rod is detected by an ionization detector, and the information of the ionization reaction is fed back to the main control IC module, thereby detecting the liquid. Compared with the traditional liquid detection method, this method has high accuracy and high sensitivity.

[0045] 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 detection device for an electric kettle, characterized in that: It comprises a main control IC module, an ionization generator, an ionization detector, a cathode ionization rod, a first anode ionization rod and a second anode ionization rod; the main control IC module is electrically connected to the ionization generator and the ionization detector respectively, the ionization generator is electrically connected to the cathode ionization rod, the first anode ionization rod and the second anode ionization rod respectively, and the ionization detector is electrically connected to the first anode ionization rod and the second anode ionization rod respectively; The structure of the cathode ionization rod is a vertical hollow rod structure, the cathode ionization rod has a central hole, an insulating cross bar is arranged above the cathode ionization rod, the middle part of the insulating cross bar is connected to the top of the cathode ionization rod, the upper end of the first anode ionization rod is connected to one end of the insulating cross bar, and the upper end of the second anode ionization rod is connected to the other end of the insulating cross bar; The liquid detection device of the electric kettle also includes an anode wire, a cathode wire, and a wire ring; the anode wires are two, and after the two anode wires pass through the middle hole of the cathode ionization rod from bottom to top, one anode wire is connected to the first anode ionization rod, and the other anode wire is connected to the second anode ionization rod; the wire ring is sleeved outside the lower end of the cathode ionization rod, and the cathode wire is connected to the wire ring; The cathode ionization rod, the first anode ionization rod and the second anode ionization rod are parallel to each other, and the length of the first anode ionization rod is longer than that of the second anode ionization rod.

2. The liquid detection device for an electric kettle according to claim 1, characterized in that: A connecting assembly is provided at the lower end of the cathode ionization rod, which is used to fix and install the cathode ionization rod in the electric kettle.

3. The liquid detection device for an electric kettle according to claim 1, characterized in that: The chip of the main control IC module is an ESP32 chip.

4. The liquid detection method of the liquid detection device of the electric kettle according to any one of claims 1 to 3, characterized in that: The steps include: S1. The main control IC module controls the ionization generator to form a positive and negative pressure difference between the cathode ionization rod and the first anode ionization rod, and also to form a positive and negative pressure difference between the cathode ionization rod and the second anode ionization rod; S2-1. Step of detecting whether there is liquid between the cathode ionization rod and the first anode ionization rod: a. When there is liquid between the cathode ionization rod and the first anode ionization rod, the liquid between the cathode ionization rod and the first anode ionization rod will undergo an ionization reaction, large charged ions will gather near the cathode ionization rod and the first anode ionization rod, and a transient current will be generated between the cathode ionization rod and the first anode ionization rod; b. The ionization detector detects the transient current generated by the ionization reaction between the cathode ionization rod and the first anode ionization rod, and feeds back the information of the ionization reaction to the main control IC module; c. The main control IC module determines that there is liquid between the cathode ionization rod and the first anode ionization rod; S2-2. Step of detecting whether there is liquid between the cathode ionization rod and the second anode ionization rod: a. When there is liquid between the cathode ionization rod and the first anode ionization rod, the liquid between the cathode ionization rod and the first anode ionization rod will undergo an ionization reaction, a large number of charged ions will gather near the cathode ionization rod and the first anode ionization rod, and a transient current will be generated between the cathode ionization rod and the second anode ionization rod; b. The ionization detector detects the transient current generated by the ionization reaction between the cathode ionization rod and the second anode ionization rod, and feeds back the information of the ionization reaction to the main control IC module; c. The main control IC module determines that there is liquid between the cathode ionization rod and the second anode ionization rod.

5. The liquid detection method of the liquid detection device of the electric kettle according to claim 4, characterized in that: In the above step S1, the main control IC module forms a positive and negative pressure difference between the cathode ionization rod and the first anode ionization rod, and also forms a positive and negative pressure difference between the cathode ionization rod and the second anode ionization rod by setting a complementary PWM signal of frequency.

6. The liquid detection method of the liquid detection device of the electric kettle according to claim 4, characterized in that: In step a of the above step S2-1, the charged ions generated by the ionization reaction of the liquid increase the positive and negative pressure difference between the cathode ionization rod and the first anode ionization rod; in step a of the above step S2-2, the charged ions generated by the ionization reaction of the liquid increase the positive and negative pressure difference between the cathode ionization rod and the second anode ionization rod.

7. The liquid detection method of the liquid detection device of the electric kettle according to claim 4, characterized in that: The ionization detector is provided with a signal amplifier to amplify the information of the ionization reaction and then feed it back to the main control IC module.

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