Small household appliances testing methods

Abstract

The present application discloses a small appliance detection method, which relates to the technical field of small appliances. A ceramic insulating column extends through the upper and lower surfaces of a metal housing, and a pole is disposed within the ceramic insulating column. A connection harness connected to a PCB control program is disposed at the rear end of the pole. The PCB control program transmits an independent high-frequency pulse signal to the pole via the connection harness. The high-frequency pulse signal generates multiple signal differences upon encountering water, which is set as a first detection method. When the vessel contains water or no water, the ceramic insulating column serves as insulation, and the two poles are connected to the PCB control program via the connection harness, generating multiple conduction signals, which is set as a second detection method. The presence of water in the vessel is determined based on the first and second detection methods. A thermistor is disposed within the metal housing through insulating adhesive, which is used to detect water temperature and control the normal operation of the small appliance. When water is present and the heating plate is heating, scale is generated. The presence of scale is determined by determining whether the resistance change of the two poles reaches a set value at the same temperature.

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] In the process of boiling water in the heating plate of traditional small household appliances such as steam pots, hanging irons, health pots, kettles, and steam irons, some of the water will evaporate and dissipate along with the water vapor due to the presence of calcium bicarbonate [Ca(HCO3)2] and magnesium bicarbonate [Mg(HCO3)2] in hard water. Meanwhile, some of the water 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 and reaches 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 technical pain points in the industry, a small household appliance detection method has been invented.

[0003] The above content is only used to assist in understanding the technical solution of this application and does not constitute an admission that the above content is 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 includes:

[0006] A ceramic insulating column passes 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;

[0007] When the PCB control program is operating normally, an independent high-frequency pulse signal is provided to the above-mentioned pole via a connecting harness. The high-frequency pulse signal generates multiple signal differences upon encountering water, which is set as a first detection method. When there is water in the vessel and when there is no water, the ceramic insulating column is used for insulation, and the two poles are connected to the PCB control program via a connecting harness, and multiple conduction signals are generated by utilizing the principle of water conductivity, which is set as a second detection method. The conversion between the first detection method and the second detection method is used to accurately determine whether there is water in the vessel.

[0008] A thermistor is provided 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.

[0009] In one embodiment, the first detection method includes: two or more different electrical signals when there is water in the container and when there is no water. In order to better adapt to various application scenarios and prevent the PCB board control program from misjudging, the two poles are operated independently.

[0010] 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 and when there is no water in the vessel; a second detection method for calculating the difference between two or more different conduction signals when there is water and when there is no water in the vessel; when the calculation results of the two detection methods are consistent, the PCB board control program gives an accurate water or water-free detection; when the calculation results of the first detection method and the second detection method are inconsistent, it is considered 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.

[0011] 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 and when there is 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 and when there is no water in the vessel. When the presence of water is accurately detected, the scale formation detection operation in the vessel is judged by the change in the resistance value at the same temperature between the two electrodes, and a scale cleaning warning is issued.

[0012] In one embodiment, the ceramic insulating column passes through the upper and lower surfaces of the metal shell, insulating the two poles from the metal shell, and ensuring that the exposed parts of the two poles have a certain vertical height with the inner plane of the metal shell, ensuring that any of the above methods is implemented 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.

[0013] 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.

[0014] In one embodiment, the second detection method further includes: isolating the two poles from the metal casing and the heating plate by means of ceramic insulating columns, and ensuring that a stable and reliable distance exists between the two poles when there is water or no water in the vessel, and when two or more different conduction signals are generated, and the reliability of the conduction signals and the physical structure of the short circuit risk are measured.

[0015] In one embodiment, a thermistor is provided in the metal shell through insulating glue, and is used for temperature control of small household appliances and scale detection of PCB board control program.

[0016] 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 and thermal conductivity of the metal surface, so that the PCB board control program issues a scale cleaning warning.

[0017] 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.

[0018] 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 provided inside the ceramic insulating column, a connecting wire harness is provided 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 on 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 described above.

[0019] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and stores a PCB board control program. When the PCB board control program is executed by the processor, the steps of the small household appliance detection method described above are implemented.

[0020] 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.

[0021] One or more technical solutions proposed in this application have at least the following technical effects:

[0022] 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 provided 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 is working normally, an independent high-frequency pulse signal is given to the above-mentioned electric 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 and when there is no water in the container, 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 multiple conduction signals are generated by using the principle of water conductivity, which is set as the second detection method; the conversion between the first detection method and the second detection method is used to accurately determine whether there is water in the container; a thermistor is provided 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. The presence or absence of scale is determined by whether the resistance change of the two electric poles reaches its set value at the same temperature.

[0023] According to the ceramic insulating column provided 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; 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.

[0024] The PCB 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 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.

[0025] The same logic applies conversely: when the second row of detection methods detects that the circuit is disconnected, then the first detection method detects that the electrical signal must be unattenuated. When the second row of detection methods detects that the circuit is connected, then the first detection method detects that the electrical signal must be attenuated. If there is any difference, it will be set to a failed state.

[0026] The system operates by converting between the first detection method and the second exclusion detection method, thereby eliminating misjudgment of water detection due to water vapor, water film layer, water droplets, tea leaves, scented tea, etc., and giving the user a water shortage warning. 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 and adapt to more severe application environments.

[0027] When the temperature sensor device is in the heating area and in the heating plate, during the water boiling process, the water contains calcium bicarbonate [Ca(HCO3)2] and magnesium bicarbonate [Mg(HCO3)2]. During the boiling process, part of the water will evaporate along with the water vapor and dissipate. While 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 deposited, 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

[0028] 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.

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 A first structural diagram provided for an embodiment of the small household appliance detection method of the present application;

[0031] Figure 2 A second structural diagram provided for an embodiment of the small household appliance detection method of the present application;

[0032] Figure 3 A third structural diagram provided for an embodiment of the small household appliance detection method of the present application;

[0033] Figure 4 This is a fourth structural diagram provided for an embodiment of the small household appliance detection method of the present application.

[0034] Description of Figure Numbers:

[0035]

[0036] The purpose, features and advantages of this application will be further explained with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0037] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0038] 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.

[0039] 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:

[0040] A ceramic insulating column B runs through the upper and lower planes of the metal housing A. A pole C is installed inside the ceramic insulating column B. A connecting wire harness D is installed at the rear end of the pole C. The connecting wire harness D is connected to the PCB board control program.

[0041] When the PCB control program is operating normally, an independent high-frequency pulse signal is provided to the above-mentioned pole C via 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 in the container G and when there is no water, the ceramic insulating column B is used for insulation. The two poles C are connected to the PCB control program via the connecting harness D, and multiple conduction signals are generated by utilizing the principle of water conductivity, which is set as the second detection method. The conversion between the first detection method and the second detection method is used to accurately determine whether there is water in the container G.

[0042] A thermistor E is provided in the metal housing A through insulating glue, which is used 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. The presence of scale is determined by whether the resistance change of the two poles C reaches the set value at the same temperature.

[0043] In a feasible embodiment, 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.

[0044] It should be noted that when there is water: water will conduct away or dilute the current and voltage on the pole, and the pole will receive a greater attenuation of the current and voltage signals. When there is no water: air will conduct away or dilute the current and voltage on the pole very little, and the pole will receive a smaller attenuation of the pulse signal or it will remain almost unchanged.

[0045] In a feasible embodiment, the PCB board control program includes: a first detection method of calculating the difference between two or more different high-frequency pulse signals when there is water and when there is no water in the vessel G; a second detection method of calculating the difference between two or more different conduction signals when there is water and when there is no water in the vessel G; when the calculation results of the two detection methods are consistent, the PCB board control program gives an accurate water or 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 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.

[0046] In a feasible 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 and when there is 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 and when there is no water in the vessel G. When the presence of water is accurately detected, the scale formation detection operation in the vessel G is judged by the change in the resistance value at the same temperature between the two electrodes, and a scale cleaning warning is issued.

[0047] In a feasible embodiment, 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-mentioned embodiments 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.

[0048] In a feasible embodiment, 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.

[0049] In a feasible embodiment, 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 there is a stable and reliable distance between the two poles C when there is water and when there is no water in the container G, and when there are two or more different conduction signals, reliability, and short circuit risk.

[0050] 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.

[0051] In a feasible embodiment, a thermistor E is provided in the metal shell A through insulating glue, and is used for temperature control of small household appliances and scale detection of PCB board control program.

[0052] In a feasible implementation, the PCB board control program includes: calculating and detecting scale precipitation by controlling the resistance change 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.

[0053] In a feasible implementation, 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.

[0054] According to the ceramic insulating column provided 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; 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.

[0055] The PCB 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 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.

[0056] The same logic applies conversely: when the second row of detection methods detects that the circuit is disconnected, then the first detection method detects that the electrical signal must be unattenuated. When the second row of detection methods detects that the circuit is connected, then the first detection method detects that the electrical signal must be attenuated. If there is any difference, it will be set to a failed state.

[0057] The system operates by converting between the first detection method and the second exclusion detection method, thereby eliminating misjudgment of water detection due to water vapor, water film layer, water droplets, tea leaves, scented tea, etc., and giving the user a water shortage warning. 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 and adapt to more severe application environments.

[0058] When the temperature sensor device is in the heating area and in the heating plate, during the water boiling process, the water contains calcium bicarbonate [Ca(HCO3)2] and magnesium bicarbonate [Mg(HCO3)2]. During the boiling process, part of the water will evaporate along with the water vapor and dissipate. While 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 deposited, 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.

[0059] 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.

[0060] The present application provides a detection device, which includes: a ceramic insulating column that passes through the upper and lower planes of a metal shell, an electric pole disposed within the ceramic insulating column, a connecting wire harness disposed at the rear end of the electric pole, and the connecting wire harness connected to a PCB board control program; at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable 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 of the above-mentioned embodiment 1.

[0061] The detection device provided in this application, using the small appliance detection method in the above-mentioned embodiment, can solve the technical problem of inaccurate small appliance detection. Compared with the prior art, the beneficial effects of the detection device provided in this application are the same as those of the small appliance detection method provided in the above-mentioned embodiment, and the other technical features of the detection device are the same as those disclosed in the above-mentioned embodiment, and are not further described here.

[0062] It should be understood that the various parts disclosed in this application can be implemented using 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.

[0063] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0064] 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.

[0065] The computer-readable storage medium provided in this 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 thereof. 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, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0066] The computer-readable storage medium may be included in the detection device, or may exist independently without being assembled into the detection device.

[0067] 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 stand-alone 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 via 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).

[0068] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of 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 box can also occur in a different order than that marked in the accompanying drawings. For example, two 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 box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0069] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0070] The computer-readable storage medium provided in this application stores computer-readable program instructions (i.e., a computer program) for executing the aforementioned small appliance detection method, thereby resolving the technical issue of inaccurate small appliance detection. Compared to the prior art, the beneficial effects of the computer-readable storage medium provided in this application are similar to those of the small appliance detection method provided in the aforementioned embodiments, and are not further elaborated here.

[0071] 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.

[0072] The computer program product provided in this application can solve the technical problem of inaccurate small appliance detection. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the small appliance detection method provided in the above embodiment, and will not be repeated here.

[0073] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application 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 includes: A ceramic insulating column passes 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 control program is operating normally, an independent high-frequency pulse signal is provided to the above-mentioned pole via a connecting harness. The high-frequency pulse signal generates multiple signal differences when it encounters water, which is set as the first detection method. The ceramic insulating column is used for insulation. The two poles are connected to the PCB control program via a connecting harness. When there is water or no water in the container, multiple conduction signals are generated using the principle of water conductivity, which is set as the second detection method. The conversion between the first detection method and the second detection method is used to accurately determine whether there is water in the container. Among them, if the first detection method and the second detection method simultaneously detect that there is water in the container, it is determined that there is water in the container; if the first detection method and the second detection method simultaneously detect that there is no water in the container, it is determined that there is no water in the container; if the first detection method and the second detection method have inconsistent judgment results on whether there is water in the container, it is determined that there is a foreign object between the two poles; among them, for the first detection method, when there is water: the higher the high-frequency pulse signal on the pole is, the greater the attenuation of the high-frequency pulse signal received back by the same pole is; when there is no water: the lower the high-frequency pulse signal on the pole is, the lower the attenuation of the high-frequency pulse signal received back by the same pole is; among them, the first detection method and the second detection method act on the same detection device composed of two poles that are mechanically coupled and associated at the same time; The PCB board control program includes: calculating the difference between two or more different high-frequency pulse signals generated when there is water or no water in the vessel using the first detection method, and calculating the difference between two or more different conduction signals generated when there is water or no water in the vessel using the second detection method; when the calculation results of the two detection methods are consistent, the PCB board control program accurately detects the presence of water or no water; when the calculation results of the first detection method and the second detection method are inconsistent, it is considered a failure state; when both poles are in a failure state, the PCB board control program generates an alarm signal indicating that there is a foreign object between the two poles; A thermistor is provided in the metal housing through insulating glue, which is used to detect water temperature and control the normal operation of the small household appliance. When there is water and the heating plate is heating, scale is generated. Whether the resistance change of the thermistor reaches its set value at the same temperature of the two poles is used to determine whether scale is present; 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.

2. The small household appliance detection method according to claim 1, wherein: In the first detection method, in order to better adapt to various application scenarios and prevent misjudgment of the PCB board control program, the two poles are operated independently.

3. The small household appliance detection method according to claim 1, wherein: The PCB board control program also includes: when the PCB board control program detects the presence of water, performing scale detection calculation in the container through the change in resistance of the thermistor at the same temperature between the two poles, and issuing a scale cleaning warning.

4. The small household appliance detection method according to claim 1, wherein: The second detection method also includes: isolating the two poles from the metal shell and the heating plate through ceramic insulating columns to ensure the reliability of the conduction signal obtained when there is water or no water in the vessel, and there is a stable and reliable distance between the two poles to prevent short circuits.

5. The small household appliance detection method according to claim 1, wherein: 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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