Small household appliance detection method

Abstract

The invention discloses a small household appliance detection method, and relates to the technical field of small household appliances. The ceramic insulation column penetrates through the upper plane and the lower plane of the metal shell, an electric pole is arranged in the ceramic insulation column, and the rear end of the electric pole is provided with a connecting wire harness communicated with a PCB control program; a PCB control program gives an independent high-frequency pulse signal to an electric pole through a connecting wire harness, the high-frequency pulse signal generates various signal differences when encountering water, and a first detection method is set; when water exists in the vessel or no water exists in the vessel, the ceramic insulation column is used for insulation, the two electric poles are connected to a PCB control program through the connecting wire harness, various conduction signals are generated, and a second detection method is set; whether water exists in the vessel or not is judged according to the first detection method and the second detection method; a thermistor is arranged in the metal shell through insulation paste and used for detecting water temperature and controlling normal work of the small household appliances, if water exists, water scale is generated during heating work of the heating disc, and whether water scale exists or not is judged by utilizing whether resistance value changes of the two electric poles at the same temperature reach set values or not.

Description

Technical Field

[0001] The present application relates to the technical field of small household appliances, and in particular to a small household appliance detection method. Background Art

[0002] Traditional small household appliances such as steam cookers, hanging irons, health pots, kettles, steam irons, etc., during the boiling process in the heating plate, due to the presence of calcium bicarbonate [Ca(HCO3)2] and magnesium bicarbonate [Mg(HCO3)2] in hard water, part of the water will evaporate and dissipate along with the water vapor during the boiling process. Part of it will form scale due to the continuous decomposition of the compounds in the aforementioned hard water to produce calcium carbonate and magnesium hydroxide. When the scale continues to precipitate to a certain thickness, it will affect thermal conductivity, electrical conductivity, sensor signal failure misjudgment, abnormally high temperature melting plate, and seriously affect the normal operation of the small household appliances. It cannot meet the needs of existing production and life. In response to the above-mentioned industry technical pain points, a small household appliance detection method has been invented.

[0003] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of this application is to provide a small household appliance detection method, aiming to solve the technical problem of inaccurate small household appliance detection.

[0005] To achieve the above objectives, the present application proposes a small household appliance detection method, which comprises: A ceramic insulating column runs through the upper and lower planes of the metal shell, wherein an electric pole is arranged inside the ceramic insulating column, and a connecting wire harness is arranged at the rear end of the electric pole, and the connecting wire harness is connected to the PCB board control program; When the PCB board control program works normally, an independent high-frequency pulse signal is given to the above-mentioned pole through the connecting harness. The high-frequency pulse signal generates multiple signal differences when it encounters water, which is set as the first detection method; when there is water or no water in the container, the ceramic insulating column is used for insulation, and the two poles are connected to the PCB board control program through the connecting harness, and multiple conduction signals are generated by using the principle of water conductivity, which is set as the second detection method; according to the conversion operation between the first detection method and the second detection method, it is accurately judged whether there is water in the container; A thermistor is arranged in the metal shell through insulating glue, which is used to detect water temperature and control the normal operation of small household appliances. When there is water and the heating plate is heating, scale is generated. Whether the resistance change of the two poles reaches the set value at the same temperature is used to judge whether there is scale.

[0006] In one embodiment, the first detection method includes: when there is water in the container and when there is no water, two or more different electrical signals are generated. In order to better adapt to various application scenarios and prevent the PCB board control program from misjudging, the two poles are operated independently.

[0007] In one embodiment, the PCB board control program includes: a first detection method for calculating the difference between two or more different high-frequency pulse signals when there is water or no water in the vessel, and a second detection method for calculating the difference between two or more different conduction signals when there is water or no water in the vessel; when the calculation results of the two detection methods are consistent, the PCB board control program gives accurate water or no water detection; when the calculation results of the first detection method and the second detection method are inconsistent, it is regarded as a failure state; when both poles are in a failure state, the PCB board control program gives an alarm signal that there is a foreign object between the two poles.

[0008] In one embodiment, the PCB board control program also includes: a first detection method for calculating the difference between two or more different high-frequency pulse signals when there is water or no water in the vessel and a second detection method for calculating the difference between two or more different conduction signals when there is water or no water in the vessel to accurately detect the presence of water, and to determine the scale detection operation in the vessel through the change in the same temperature resistance between the two electrodes, and to issue a scale cleaning warning.

[0009] In one embodiment, the ceramic insulating column passes through the upper and lower surfaces of the metal shell, insulates the two poles from the metal shell, and makes the exposed parts of the two poles have a certain vertical height with the inner plane of the metal shell, ensuring the realization of any of the above methods and preventing waterless dry burning from damaging small household appliances; the lower plane is insulated from the heating plate and external metal parts, and the exposed parts of the lower ends of the two poles are connected to the connecting wire harness to achieve shielding of signal input and output from external factors.

[0010] In one embodiment, the exposed parts of the two poles are semi-arc structures that are not easy to scale. The scale generated by small household appliances during the heating process has less adhesion on the semi-arc surface, reducing the risk of scale formation on the exposed parts of the two poles and preventing injuries to the human body during cleaning.

[0011] In one embodiment, the second detection method also includes: isolating the two poles from the metal casing and the heating plate by means of ceramic insulating columns, and ensuring that when there is water or no water in the vessel, conduction, disconnection, two or more different conduction signal reliabilities, and a physical structure with short circuit risks are generated, and there is a stable and reliable distance between the two poles.

[0012] In one embodiment, a thermistor is provided in the metal shell through insulating glue, and is applied to temperature control of small household appliances and scale detection of PCB board control program.

[0013] In one embodiment, the PCB board control program includes: calculating and detecting scale precipitation by controlling the change in resistance between two poles at the same distance and temperature; when the scale precipitation reaches a certain value, it will affect the electrical conductivity and thermal conductivity of the metal surface, so that the PCB board control program issues a scale cleaning warning.

[0014] In one embodiment, the PCB board control program includes: judging whether there is scale by setting a value, using pure water as a reference to set a base value, and the set value changes according to different application scenarios of the small household appliance.

[0015] In addition, to achieve the above-mentioned purpose, the present application also proposes a detection device, which includes: a ceramic insulating column running through the upper and lower planes of the metal shell, an electric pole is arranged inside the ceramic insulating column, a connecting wire harness is arranged at the rear end of the electric pole, and the connecting wire harness is connected to a PCB board control program; a memory, a processor and a PCB board control program stored in the memory and runnable on the processor, the PCB board control program being configured to implement the steps of the small household appliance detection method as described above.

[0016] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a PCB board control program is stored on the storage medium. When the PCB board control program is executed by the processor, the steps of the small household appliance detection method described above are implemented.

[0017] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a PCB board control program, and when the PCB board control program is executed by a processor, it implements the steps of the small household appliance detection method described above.

[0018] One or more technical solutions proposed in this application have at least the following technical effects: In the present application, a ceramic insulating column runs through the upper and lower planes of the metal shell, and an electric pole is arranged inside the ceramic insulating column. A connecting harness is arranged at the rear end of the electric pole, and the connecting harness is connected to the PCB board control program; when the PCB board control program works normally, an independent high-frequency pulse signal is given to the above-mentioned electric pole through the connecting harness, and the high-frequency pulse signal generates a variety of signal differences when it encounters water, which is set as the first detection method; when there is water in the container and when there is no water, the ceramic insulating column is used for insulation, and the two electric poles are connected to the PCB board control program through the connecting harness, and a variety of conduction signals are generated by using the principle of water conductivity, which is set as the second detection method; according to the conversion operation between the first detection method and the second detection method, it is accurately judged whether there is water in the container; a thermistor is arranged in the metal shell through insulating glue, which is used to detect the water temperature and control the normal operation of small household appliances. When there is water and the heating plate is heating, scale is generated. Whether the resistance change of the two electric poles reaches its set value at the same temperature is used to judge whether there is scale.

[0019] According to the ceramic insulating column arranged between the two poles and the metal shell in the above structure, when there is no water in the container: the two poles are in an open circuit state, and when there is water in the container, the two poles are in a conductive state. The PCB board control program determines whether there is water in the container based on the presence or absence of a conductive signal, which is regarded as the second exclusion detection method.

[0020] The PCB board control program detects the presence of water according to the first detection method: then the second exclusion detection method, the two electrodes must be conductive. The PCB board control program detects the presence of water according to the first detection method: then the second exclusion detection method, the two electrodes must be disconnected.

[0021] The same logic can be applied in reverse: when the second row of detection methods detects that the circuit is disconnected, then the first detection method detects that the electrical signal is not attenuated. When the second row of detection methods detects that the circuit is connected, then the first detection method detects that the electrical signal is attenuated. If there is any difference, it will be set to an invalid state.

[0022] By converting between the first detection method and the second exclusion detection method, misjudgment of water detection due to water vapor, water film layer, water droplets, tea leaves, scented tea, etc. is eliminated, and a water shortage warning is given to the user. When the first detection method and the second exclusion detection method fail at the same time, the PCB board control program will prompt that there is a foreign object between the two poles, and give a foreign object warning, so as to achieve accurate water detection to adapt to more severe application environments.

[0023] When the temperature sensor device is in the heating area and the water is boiled in the heating plate, the water contains calcium bicarbonate [Ca(HCO3)2] and magnesium bicarbonate [Mg(HCO3)2]. During the boiling process, part of the water will evaporate with the water vapor and dissipate. And part of it will continue to precipitate on the surface of the two poles. When the scale reaches a certain thickness, it will affect its thermal conductivity and electrical conductivity. The temperature sensor not only provides parameters for the operation of small household appliances, but also serves as the basis for detecting scale temperature. Under the same temperature conditions and the same spacing, the more scale is precipitated, the greater the resistance between the two electrodes. The resistance between the two poles takes the resistance of pure water as a reference. The circuit board control program calculates according to the temperature and its resistance change. When the resistance between the two poles is about to reach its reference value, a scale warning prompts cleaning, thereby ensuring the normal operation of the small household sensor detection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A first structural schematic diagram provided for an embodiment of the small household appliance detection method of the present application; Figure 2 A second structural schematic diagram provided for an embodiment of the small household appliance detection method of the present application; Figure 3 A third structural schematic diagram provided for an embodiment of the small household appliance detection method of the present application; Figure 4 A fourth structural diagram provided for an embodiment of the small household appliance detection method of the present application.

[0027] Description of Figure Numbers:

[0028] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0030] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0031] This application embodiment provides a small household appliance detection method, please refer to Figures 1 to 4 In this embodiment, the small household appliance detection method includes: A ceramic insulating column B runs through the upper and lower planes of the metal shell A, wherein an electric pole C is arranged inside the ceramic insulating column B, and a connecting wire harness D is arranged at the rear end of the electric pole C, and the connecting wire harness D is connected to the PCB board control program; When the PCB board control program works normally, an independent high-frequency pulse signal is given to the above-mentioned pole C through the connecting harness D. The high-frequency pulse signal generates multiple signal differences when it encounters water, which is set as the first detection method; when there is water or no water in the container G, the ceramic insulating column B is used for insulation, and the two poles C are connected to the PCB board control program through the connecting harness D, and multiple conduction signals are generated by using the principle of water conductivity, which is set as the second detection method; according to the conversion operation between the first detection method and the second detection method, it is accurately judged whether there is water in the container G; A thermistor E is provided in the metal shell A through insulating glue to detect water temperature and control the normal operation of small household appliances. When water is present and the heating plate F is heating, scale is generated. Whether the resistance change of the two poles C reaches the set value at the same temperature is used to determine whether scale is present.

[0032] In a feasible implementation, the first detection method includes: when there is water in the container G and when there is no water, two or more different electrical signals are generated. In order to better adapt to various application scenarios and prevent the PCB board control program from misjudging, the two poles C are operated independently.

[0033] It should be noted that when there is water: water will conduct away or dilute the current and voltage on the pole, and the greater the attenuation of the current and voltage signals received by the pole, when there is no water: air will conduct away or dilute the current and voltage on the pole very little, and the attenuation of the pulse signal received by the pole will be smaller or almost unchanged.

[0034] In a feasible implementation manner, the PCB board control program includes: a first detection method for calculating the difference between two or more different high-frequency pulse signals when there is water or no water in the vessel G, and a second detection method for calculating the difference between two or more different conduction signals when there is water or no water in the vessel G; when the calculation results of the two detection methods are consistent, the PCB board control program gives accurate water or no water detection; when the calculation results of the first detection method and the second detection method are inconsistent, it is regarded as a failure state; when both poles C are in a failure state, the PCB board control program gives an alarm signal that there is a foreign object between the two poles C.

[0035] In a feasible implementation manner, the PCB board control program also includes: a first detection method for calculating the difference between two or more different high-frequency pulse signals when there is water or no water in the vessel G and a second detection method for calculating the difference between two or more different conduction signals when there is water or no water in the vessel G to accurately detect the presence of water, and to determine the scale formation detection operation in the vessel G through the change in the same temperature resistance between the two electrodes, and to issue a scale cleaning warning.

[0036] In a feasible implementation manner, the ceramic insulating column B passes through the upper and lower surfaces of the metal shell A, insulates the two poles C from the metal shell A, and makes the exposed parts of the two poles C have a certain vertical height with the inner plane of the metal shell A, ensuring the implementation of the method of any of the above implementation manners and preventing damage to small household appliances due to dry burning without water; the lower plane is insulated from the heating plate F and external metal parts, and the exposed parts of the lower ends of the two poles C are connected to the connecting harness D to achieve shielding of signal input and output from external factors.

[0037] In a feasible implementation, the exposed parts of the two poles C are semi-arc structures that are not easy to scale. The scale generated by small household appliances during the heating process has less adhesion on the semi-arc surface, reducing the risk of scale formation on the exposed parts of the two poles C and preventing injuries to the human body during cleaning.

[0038] In a feasible implementation, the second detection method also includes: insulating and separating the two poles C from the metal shell A and the heating plate F through ceramic insulating columns B, and ensuring that when there is water or no water in the container G, conduction, disconnection, and two or more different conduction signal reliabilities, as well as the physical structure of the short circuit risk, there is a stable and reliable distance between the two poles C.

[0039] It should be noted that when there is no water in the container G, the circuit between the two poles is open; when there is water in the container G, the circuit between the two poles is connected.

[0040] In a feasible implementation manner, a thermistor E is provided in the metal shell A through insulating glue, and is applied to temperature control of small household appliances and scale detection of PCB board control program.

[0041] In a feasible implementation, the PCB board control program includes: calculating and detecting scale precipitation by controlling the change in resistance between two poles C at the same distance and temperature; when the scale precipitation reaches a certain value, it will affect the electrical conductivity and thermal conductivity of the metal surface, so that the PCB board control program issues a scale cleaning warning.

[0042] In a feasible implementation, the PCB board control program includes: judging the presence or absence of scale by setting a value, using pure water as a reference to set a base value, and the set value changes according to different application scenarios of the small household appliance.

[0043] According to the ceramic insulating column arranged between the two poles and the metal shell in the above structure, when there is no water in the container: the two poles are in an open circuit state, and when there is water in the container, the two poles are in a conductive state. The PCB board control program determines whether there is water in the container based on the presence or absence of a conductive signal, which is regarded as the second exclusion detection method.

[0044] The PCB board control program detects the presence of water according to the first detection method: then the second exclusion detection method, the two electrodes must be conductive. The PCB board control program detects the presence of water according to the first detection method: then the second exclusion detection method, the two electrodes must be disconnected.

[0045] The same logic can be applied in reverse: when the second row of detection methods detects that the circuit is disconnected, then the first detection method detects that the electrical signal is not attenuated. When the second row of detection methods detects that the circuit is connected, then the first detection method detects that the electrical signal is attenuated. If there is any difference, it will be set to an invalid state.

[0046] By converting between the first detection method and the second exclusion detection method, misjudgment of water detection due to water vapor, water film layer, water droplets, tea leaves, scented tea, etc. is eliminated, and a water shortage warning is given to the user. When the first detection method and the second exclusion detection method fail at the same time, the PCB board control program will prompt that there is a foreign object between the two poles, and give a foreign object warning, so as to achieve accurate water detection to adapt to more severe application environments.

[0047] When the temperature sensor device is in the heating area and the water is boiled in the heating plate, the water contains calcium bicarbonate [Ca(HCO3)2] and magnesium bicarbonate [Mg(HCO3)2]. During the boiling process, part of the water will evaporate with the water vapor and dissipate. And part of it will continue to precipitate on the surface of the two poles. When the scale reaches a certain thickness, it will affect its thermal conductivity and electrical conductivity. The temperature sensor not only provides parameters for the operation of small household appliances, but also serves as the basis for detecting scale temperature. Under the same temperature conditions and the same spacing, the more scale is precipitated, the greater the resistance between the two electrodes. The resistance between the two poles takes the resistance of pure water as a reference. The circuit board control program calculates according to the temperature and its resistance change. When the resistance between the two poles is about to reach its reference value, a scale warning prompts cleaning, thereby ensuring the normal operation of the small household sensor detection system.

[0048] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the small household appliance detection method of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0049] The present application provides a detection device, which includes: a ceramic insulating column that runs through the upper and lower planes of a metal shell, an electric pole is arranged inside the ceramic insulating column, a connecting wire harness is arranged at the rear end of the electric pole, and the connecting wire harness is connected to a PCB board control program; at least one processor; and a memory that is communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the small household appliance detection method in the above-mentioned embodiment one.

[0050] The detection device provided by the present application adopts the small household appliance detection method in the above embodiment, which can solve the technical problem of inaccurate detection of small household appliances. Compared with the prior art, the beneficial effects of the detection device provided by the present application are the same as the beneficial effects of the small household appliance detection method provided by the above embodiment, and other technical features in the detection device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0051] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0053] The present application provides a computer-readable storage medium having computer-readable program instructions (i.e., a PCB board control program) stored thereon, and the computer-readable program instructions are used to execute the small household appliance detection method in the above-mentioned embodiment.

[0054] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM: Random Access Memory), a read-only memory (ROM: Read Only Memory), an erasable programmable read-only memory (EPROM: Erasable Programmable Read Only Memory or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM: CD-Read Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency: Radio Frequency), etc., or any suitable combination of the above.

[0055] The computer-readable storage medium may be included in the detection device; or may exist independently without being assembled into the detection device.

[0056] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0057] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0058] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0059] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned small household appliance detection method, and can solve the technical problem that the small household appliance detection is not accurate enough. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the small household appliance detection method provided in the above-mentioned embodiment, and will not be repeated here.

[0060] The present application also provides a computer program product, including a PCB board control program, which implements the steps of the small household appliance detection method as described above when executed by a processor.

[0061] The computer program product provided by this application can solve the technical problem of inaccurate detection of small household appliances. Compared with the prior art, the beneficial effects of the computer program product provided by this application are the same as the beneficial effects of the small household appliance detection method provided by the above embodiment, which will not be repeated here.

[0062] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A small household appliance detection method, characterized in that: The small household appliance detection method comprises: A ceramic insulating column runs through the upper and lower planes of the metal shell, wherein an electric pole is arranged inside the ceramic insulating column, and a connecting wire harness is arranged at the rear end of the electric pole, and the connecting wire harness is connected to the PCB board control program; When the PCB board control program works normally, an independent high-frequency pulse signal is given to the above-mentioned pole through the connecting harness. The high-frequency pulse signal generates multiple signal differences when it encounters water, which is set as the first detection method; when there is water or no water in the container, the ceramic insulating column is used for insulation, and the two poles are connected to the PCB board control program through the connecting harness, and multiple conduction signals are generated by using the principle of water conductivity, which is set as the second detection method; according to the conversion operation between the first detection method and the second detection method, it is accurately judged whether there is water in the container; A thermistor is arranged in the metal shell through insulating glue, which is used to detect water temperature and control the normal operation of small household appliances. When there is water and the heating plate is heating, scale is generated. Whether the resistance change of the two poles reaches the set value at the same temperature is used to judge whether there is scale.

2. The small household appliance detection method according to claim 1, characterized in that: The first detection method includes: when there is water in the container and when there is no water, two or more different electrical signals are generated. In order to better adapt to various application scenarios and prevent the PCB board control program from misjudgment, the two poles are operated independently.

3. The small household appliance detection method according to claim 1, characterized in that: The PCB board control program includes: the first detection method calculates the difference between two or more different high-frequency pulse signals when there is water or no water in the vessel, and the second detection method calculates the difference between two or more different conduction signals when there is water or no water in the vessel; when the calculation results of the two detection methods are consistent, the PCB board control program gives accurate water and water-free detection; when the calculation results of the first detection method and the second detection method are inconsistent, it is regarded as a failure state; when both poles are in a failure state, the PCB board control program gives an alarm signal that there is a foreign object between the two poles.

4. The small household appliance detection method according to claim 1, characterized in that: The PCB board control program also includes: a first detection method to calculate the difference between two or more different high-frequency pulse signals when there is water or no water in the vessel, and a second detection method to calculate the difference between two or more different conduction signals when there is water or no water in the vessel. When the presence of water is accurately detected, the scale detection operation in the vessel is judged by the change of the same temperature resistance between the two electrodes, and a scale cleaning warning is issued.

5. The small household appliance detection method according to claim 1, characterized in that: The ceramic insulating column passes through the upper and lower surfaces of the metal shell, insulating the two poles from the metal shell, and making the exposed parts of the two poles have a certain vertical height with the inner plane of the metal shell, ensuring the realization of any one of the methods of claims 1 to 4 above, and preventing damage to small household appliances due to dry burning without water; the lower plane is insulated from the heating plate and external metal parts, and the exposed parts of the lower ends of the two poles are connected to the connecting wire harness to achieve shielding of signal input and output from external factors.

6. The small household appliance detection method according to claim 1, characterized in that: The exposed parts of the two poles are semi-arc structures that are not easy to scale. The scale generated by small household appliances during the heating process has less adhesion on the semi-arc surface, reducing the risk of scale formation on the exposed parts of the two poles and preventing injuries to the human body during cleaning.

7. The small household appliance detection method according to claim 1, characterized in that: The second detection method also includes: isolating the two poles from the metal casing and the heating plate by means of ceramic insulating columns, and ensuring that when there is water or no water in the vessel, two or more different conduction signals are generated, the reliability of the conduction signals is measured, and the physical structure of the short circuit risk is measured, and there is a stable and reliable distance between the two poles.

8. The small household appliance detection method according to claim 1, characterized in that: The metal shell is provided with a thermistor through insulating glue, and is applied to temperature control of small household electrical appliances and scale detection of PCB board control program.

9. The small household appliance detection method according to claim 1, characterized in that: The PCB board control program includes: calculating and detecting scale precipitation by controlling the change of resistance between two poles at the same distance and temperature; when the scale precipitation reaches a certain value, it will affect the electrical conductivity and thermal conductivity of the metal surface, so that the PCB board control program issues a scale cleaning warning.

10. The small household appliance detection method according to claim 1, characterized in that: The PCB board control program includes: judging whether there is scale by setting a value, using pure water as a reference to set a base value, and the set value changes according to different application scenarios of small household appliances.

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