A monitoring method of a household appliance

Abstract

The application provides a monitoring method of a household appliance, the household appliance comprising a plurality of loads and a detection device for detecting the plurality of loads, the detection device comprising a power supply interface, a resistance unit and a plurality of control circuits for controlling the plurality of loads, the resistance unit comprising a first resistance and a plurality of second resistances connected with the power supply interface in sequence, the resistance value of the resistance unit being adjustable by the plurality of control circuits, the monitoring method comprising: when the plurality of loads are not in a working state and the resistance value of the resistance unit is a first resistance value, obtaining a first voltage value between the first resistance; determining whether there is a zero-crossing signal of the input voltage of the power supply interface according to the first voltage value, if it is determined that there is the zero-crossing signal, controlling a control circuit to control a load to be in the working state, and making the resistance value of the resistance unit be a second resistance value, the first resistance value being different from the second resistance value; obtaining a second voltage value between the first resistance; and determining the working state of the load according to the second voltage value.

Description

[Technical Field]

[0001] This invention relates to the field of communications, and more specifically to a method for monitoring household appliances. [Background Technology]

[0002] Currently, with the rapid development of computer network technology, digital signal processing technology and modern communication technology, the home appliance industry is also developing rapidly.

[0003] However, some loads in existing household appliances may experience circuit aging or damage after a period of use. Therefore, there is a need to provide a monitoring method for household appliances.

[0004] However, traditional monitoring methods are quite complex, which leads to longer detection times and reduced security. [Summary of the Invention]

[0005] The purpose of this invention is to provide a method for monitoring household appliances, which solves the problem of the complexity of existing monitoring algorithm design.

[0006] The technical solution of the present invention is as follows: This application provides a monitoring method for a household appliance, the household appliance including multiple loads and a detection device for detecting the multiple loads. The detection device includes a power interface, a resistor unit, and multiple control circuits for controlling the multiple loads. The resistor unit includes a first resistor and multiple second resistors connected sequentially to the power interface. The resistance value of the resistor unit can be adjusted by the multiple control circuits. The monitoring method includes:

[0007] When the plurality of loads are not in operation and the resistance of the resistor unit is a first resistance value, the first voltage value across the first resistor is obtained;

[0008] Determine whether there is a zero-crossing signal in the input voltage of the power interface based on the first voltage value;

[0009] If a zero-crossing signal is determined to exist, the control circuit controls the load to be in a working state and makes the resistance of the resistor unit a second resistance value, wherein the first resistance value is not equal to the second resistance value.

[0010] Obtain the second voltage value across the first resistor;

[0011] The operating state of the load is determined based on the second voltage value.

[0012] Optionally, the plurality of loads includes a first load and a second load, the control circuit includes a first control circuit for controlling the first load and a second control circuit for controlling the second load, the second resistor includes a first sub-resistor connected to the first control circuit and a second sub-resistor connected to the second control circuit, the first sub-resistor and the second sub-resistor being connected in series; the control circuit controls the load to be in an operating state and makes the resistance value of the resistor unit a second resistance value, including:

[0013] The first control circuit controls the first load to be in a working state and short-circuits the first sub-resistor so that the resistance value of the resistor unit is the second resistance value.

[0014] Obtain the second voltage value across the first resistor;

[0015] The operating state of the first load is determined based on the second voltage value;

[0016] If the first load is in normal working condition, the second control circuit controls the second load to be in working condition and short-circuits the second sub-resistor so that the resistance value of the resistor unit is the third resistance value.

[0017] Optionally, after controlling the second control circuit to put the second load into an operating state, the monitoring method further includes:

[0018] Obtain the third voltage value across the first resistor;

[0019] The operating states of the first load and the second load are determined based on the third voltage value;

[0020] If the third voltage value is within the first preset range, then it is determined that the first load is in a working state and the second load is not in a working state;

[0021] If the third voltage value is within the second preset range, then it is determined that the first load is not in a working state and the second load is not in a working state.

[0022] If the third voltage value is within the third preset range, then the first load is determined to be in a working state, and the second load is determined to be in a working state; wherein the first preset range, the second preset range, and the third preset range do not overlap.

[0023] Optionally, after controlling the second control circuit to put the second load into an operating state, the monitoring method further includes:

[0024] Obtain the fourth voltage value across the first resistor;

[0025] The operating states of the first load and the second load are determined based on the fourth voltage value;

[0026] If the first control circuit is in the on state, the second control circuit is not in the on state, and the fourth voltage value is not within the first preset range, then the first load is in an abnormal working state.

[0027] If the first control circuit is in the on state, the second control circuit is in the on state, and the fourth voltage value is not within the third preset range, then the second control circuit is turned off, and the fifth voltage value across the first resistor is obtained.

[0028] The operating state of the first load is determined based on the fifth voltage value;

[0029] If the fifth voltage value is within the first preset range, then it is determined that the first load is working normally and the second load is not working normally.

[0030] If the fifth voltage value is not within the first preset range, then the first load is determined to be in an abnormal working state.

[0031] Optionally, the plurality of loads includes a third load and a fourth load, the control circuit includes a third control circuit for controlling the third load and a fourth control circuit for controlling the fourth load, the second resistor includes a fifth sub-resistor and a sixth sub-resistor, the first resistor includes a seventh sub-resistor and an eighth sub-resistor, the resistor unit further includes a fifth resistor, the two ends of the fifth sub-resistor are connected to the first control circuit, the two ends of the fifth sub-resistor and the sixth sub-resistor are connected to the second control circuit, one end of the fifth resistor is disposed between the fifth sub-resistor and the sixth sub-resistor, and the other end of the fifth resistor is disposed between the seventh sub-resistor and the eighth sub-resistor, the control circuit controls the load to be in a working state, and makes the resistance value of the resistor unit a second resistance value including:

[0032] At least one of the third control circuit and the fourth control circuit is turned on to adjust the resistance value of the resistor unit;

[0033] Obtain the sixth voltage value across the eighth sub-resistor;

[0034] The operating states of the third load and the fourth load are determined based on the sixth voltage value.

[0035] Optionally, determining the operating states of the third load and the fourth load based on the sixth voltage value includes:

[0036] If the sixth voltage value is within the fourth preset range, then the third load is determined to be in a working state, and the fourth load is not in a working state.

[0037] If the sixth voltage value is within the fifth preset range, then it is determined that the third load is not in a working state and the fourth load is in a working state.

[0038] If the sixth voltage value is within the sixth preset range, then it is determined that the third load is in a working state and the fourth load is in a working state.

[0039] If the sixth voltage value is within the seventh preset range, then it is determined that the third load is not in a working state and the fourth load is not in a working state.

[0040] The fourth preset range, the fifth preset range, the sixth preset range, and the seventh preset range do not overlap.

[0041] Optionally, after determining that the third load is in a working state and the fourth load is in a working state, the method includes:

[0042] Obtain the seventh voltage value across the eighth sub-resistor;

[0043] Determine whether the seventh voltage value is within the sixth preset range;

[0044] If the seventh voltage value is not within the sixth preset range, then the third control circuit is disconnected, and the eighth voltage value across the eighth sub-resistor is obtained;

[0045] Determine whether the eighth voltage value is within the fifth preset range;

[0046] If the eighth voltage value is within the fifth preset range, then the fourth load is determined to be operating normally.

[0047] If the eighth voltage value is not within the fifth preset range, then it is determined that the fourth load is not operating normally.

[0048] Optionally, after determining that the fourth load is not functioning properly, the monitoring method further includes:

[0049] Disconnect the fourth control circuit and obtain the ninth voltage value across the eighth sub-resistor;

[0050] Determine whether the ninth voltage value is within the fourth preset range;

[0051] If the ninth voltage value is within the fourth preset range, then the third load is determined to be operating normally.

[0052] If the ninth voltage value is not within the fourth preset range, then the third load is determined to be not operating normally.

[0053] Optionally, after controlling the fourth control circuit to turn on the fourth load, the monitoring method further includes:

[0054] Obtain the tenth voltage value across the eighth sub-resistor;

[0055] The operating states of the third load and the fourth load are determined based on the tenth voltage value;

[0056] If it is determined that the third control circuit is in the conducting state, the fourth control circuit is not in the conducting state, and the tenth voltage value is not within the fourth preset range, then it is determined that the third load is in an abnormal working state.

[0057] If it is determined that the third control circuit is not in a conducting state, the fourth control circuit is in a conducting state, and the tenth voltage value is not within the fifth preset range, then it is determined that the fourth load is in an abnormal working state.

[0058] Optionally, determining the operating state of the first load based on the second voltage value includes:

[0059] Within a first preset time period, the voltage signal across the first resistor is continuously acquired n times to obtain multiple first voltage signals;

[0060] The second voltage value is obtained by averaging multiple first voltage signals.

[0061] Determine whether the second voltage value is within the first preset range;

[0062] If the second voltage value is within the first preset range, then the first load is determined to be operating normally;

[0063] If the second voltage value is lower than the first preset range, it is determined that the first load is in a low-voltage state, and low-voltage protection is activated;

[0064] If the second voltage value is higher than the first preset range, it is determined that the first load is in a high-voltage state, and high-voltage protection is activated.

[0065] The beneficial effects of this invention are as follows: This application provides a monitoring method for a household appliance, which includes multiple loads and a detection device. The detection device includes a resistor unit and multiple control circuits. When the load is not in operation, a first voltage value across a first resistor is detected. Based on the voltage value, it is determined whether there is a zero-crossing signal. When a zero-crossing signal is detected, a load is controlled to be in operation, thereby causing a change in the resistance value of the resistor unit. At this time, a second voltage value across the first resistor is detected, and the operating state of the load is determined based on the second voltage value. Thus, this application only needs to detect the voltage across the first resistor to identify the zero-crossing signal and detect the operating state of the load. The monitoring method of this embodiment does not rely on too many detection devices, thereby reducing energy consumption. In addition, this monitoring method does not require complex algorithms for calculation, thereby improving the accuracy of load monitoring. [Attached Image Description]

[0066] Figure 1 This is a first flowchart illustrating the home appliance monitoring method provided in an embodiment of this application;

[0067] Figure 2 This is a second flowchart illustrating the home appliance monitoring method provided in an embodiment of this application;

[0068] Figure 3 for Figure 2 The circuit diagram corresponding to the home appliance monitoring method shown is shown below.

[0069] Figure 4 for Figure 2 The diagram shows the first process of judging the working status of the load in the home appliance monitoring method shown.

[0070] Figure 5 for Figure 2 The diagram shows the second process of judging the working status of the load in the home appliance monitoring method shown.

[0071] Figure 6 A schematic diagram of the third process of the home appliance monitoring method provided in the embodiments of this application;

[0072] Figure 7 for Figure 6 The circuit diagram corresponding to the home appliance monitoring method shown is shown below.

[0073] Figure 8 for Figure 6 The diagram shows the first process of judging the working status of the load in the home appliance monitoring method shown.

[0074] Figure 9 for Figure 6The diagram shows the second process of judging the working status of the load in the home appliance monitoring method.

Detailed Implementation Methods

[0075] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. The invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0076] Household appliances are being used more and more frequently in daily life. However, after prolonged use, these appliances may experience circuit aging or damage, which users cannot identify from the surface. This can lead to users using these appliances without their knowledge, resulting in certain safety issues.

[0077] However, existing monitoring methods require separate zero-crossing detection and load status detection, which makes the monitoring methods for home appliances more complex, leading to longer detection times and reduced security.

[0078] Therefore, in order to solve the above problems, this application proposes a method for monitoring household appliances. The following description, in conjunction with the accompanying drawings and embodiments, further illustrates this application.

[0079] Please see Figure 1 , Figure 1 This is a first flowchart illustrating the home appliance monitoring method provided in this application embodiment. This application embodiment provides a home appliance monitoring method. The home appliance 100 includes multiple loads and a detection device for detecting the multiple loads. The detection device includes a power interface 10, a resistor unit 20, and multiple control circuits for controlling the multiple loads. The resistor unit 20 includes a first resistor and multiple second resistors sequentially connected to the power interface 10. The resistance value of the resistor unit 20 can be adjusted by the multiple control circuits. The specific flow of the monitoring method is as follows:

[0080] 101. When multiple loads are not in operation and the resistance of the resistor unit is the first resistance value, obtain the first voltage value across the first resistor.

[0081] When the first power port 10 is powered on, the input voltage of the first power input is Vin. The control circuit 50 is not turned on, and multiple loads are not in working state. The first resistor and multiple resistors in the resistor unit 20 are all turned on. At this time, the resistance value of the resistor unit 20 is the first resistance value.

[0082] Multiple voltage signals across the first resistor are acquired over a period of time, and the average value of the multiple voltage signals is calculated to obtain the first voltage value.

[0083] It should be noted that the first resistance value can be the sum of the resistance of the first resistor and the resistance values ​​of multiple second resistors.

[0084] 102. Determine whether there is a zero-crossing signal at the input voltage of the power interface based on the first voltage value.

[0085] The first voltage value is compared with the voltage threshold corresponding to the zero-crossing detection set inside the chip. If the first voltage value is equal to the voltage threshold, the input voltage of the power interface 10 is in a zero-crossing state; if the first voltage value is not equal to the voltage threshold, the input voltage of the power interface 10 is not in a zero-crossing state.

[0086] 103. If a zero-crossing signal is determined to exist, a control circuit is used to control a load to be in a working state, and the resistance of resistor unit 20 is set to the second resistance value, while the first resistance value is not equal to the second resistance value.

[0087] When a zero-crossing signal is confirmed, the control circuit and the load are in a working state. When the control circuit is turned on, the resistance value of the resistor unit 20 will change. At this time, the resistance value of the resistor unit 20 is the second resistance value.

[0088] It should be noted that the first resistance value is not equal to the second resistance value; the first resistance value can be less than the second resistance value, or the first resistance value can be greater than the second resistance value.

[0089] 104. Obtain the second voltage value across the first resistor.

[0090] When a control circuit is turned on, the voltage signal across the first resistor is continuously acquired n times within a second preset time period to obtain multiple second voltage signals. The multiple second voltage signals are averaged to obtain the second voltage value, where n is a natural number greater than or equal to 1.

[0091] 105. Determine the operating status of the load based on the second voltage value.

[0092] Determine whether the second voltage value is within the preset range;

[0093] If the second voltage value is within the preset range, then the load is determined to be operating normally;

[0094] If the second voltage value is lower than the preset range, it is determined that the load is in a low-voltage state, and the low-voltage protection is activated.

[0095] If the second voltage value is higher than the preset range, it is determined that the load is in a high-voltage state, and the high-voltage protection is activated.

[0096] In some embodiments, if the load is operating normally, another control circuit is controlled to turn on another load. By turning on another load while one load is operating safely, the safety of the household appliance 100 can be improved.

[0097] This embodiment of the application can identify zero-crossing signals by detecting the voltage across the first resistor and detect the working status of the load. The monitoring method of this embodiment does not rely on too many detection devices, thereby reducing energy consumption. In addition, this monitoring method does not require complex algorithms for calculation, thereby improving the accuracy of load monitoring.

[0098] For example, please continue reading Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the second process of the home appliance monitoring method provided in the embodiments of this application. Figure 3 for Figure 2 The circuit diagram corresponding to the home appliance monitoring method shown is illustrated below. In some embodiments, the power interface 10 includes a first interface 110 and a second interface 120; the chip 40 is connected to each control circuit 50 and a first resistor 210. The control circuit 50 includes a first control circuit 510 and a second control circuit 520. The load includes a first load 60 connected to the first control circuit 510 and a second load 70 connected to the second control circuit 520. A plurality of second resistors include a first sub-resistor 210 and a second sub-resistor 220. The two ends of the first sub-resistor 210 are connected to the first control circuit 510, and the two ends of the second sub-resistor 220 are connected to the second control circuit 520. Each control circuit 50 is connected to the two ends of a second resistor to disconnect or connect the two ends of the second resistor. The first end of the first sub-resistor 210 away from the connection end is used to connect to the first power interface 110, and the connection end of the first sub-resistor 210 is used to connect to the first load 60. The first end of the second sub-resistor 220 away from the connection end is used to connect to the connection end of the first sub-resistor 210, and the connection end of the second sub-resistor 220 is used to connect to the second load 70. The first resistor 210 includes a third sub-resistor 230 and a fourth sub-resistor 240. The first terminal of the third sub-resistor 230 is connected to the connection terminal of the second sub-resistor 220, and the second terminal of the third sub-resistor 230 is connected to the first terminal of the fourth sub-resistor 240. The second terminal of the fourth sub-resistor 240 is connected to the second interface 120 of the power interface 10. The input voltage input to the first interface 110 of the power interface 10 is Vin. The resistance values ​​of the first sub-resistor 210 are R1, the second sub-resistor 220 are R2, the third sub-resistor 230 are R3, and the fourth sub-resistor 240 are R4. The flow of this monitoring method is as follows:

[0099] 201. The first control circuit controls the first load to be in working state and short-circuits the first sub-resistor so that the resistance value of the resistor unit is the second resistance value.

[0100] First, when the first control circuit 510 is not conducting the first load 60 and the second control circuit 520 is not conducting the second load 70, that is, when both ends of the first sub-resistor 210 and the second sub-resistor 220 are not disconnected and both the first sub-resistor 210 and the second sub-resistor 220 are conducting, the input voltage is divided by the first sub-resistor 210, the second sub-resistor 220, the third sub-resistor 230 and the fourth sub-resistor 240 so that when the first voltage V1 across the fourth sub-resistor 240 is V1 = Vin*R4 / (R1+R2+R3+R4), the zero-crossing signal of the input voltage of the power interface 10 is detected.

[0101] After detecting a zero-crossing signal, the first control circuit 510 is turned on, and the first control circuit 510 is controlled to control the first load 60 to be in working state. When the first load 60 is working and the second load 70 is not working, the first sub-resistor 210 is short-circuited by the first control circuit 510, the second sub-resistor 220 is turned on, and the input voltage is divided by the second sub-resistor 220, the third sub-resistor 230 and the fourth sub-resistor 240 so that the second voltage V2 across the fourth sub-resistor 240 is V2 = Vin*R4 / (R2+R3+R4).

[0102] 202. Obtain the second voltage value across the first resistor.

[0103] The voltage across the fourth sub-resistor 240 was measured multiple times, and the second voltage value was calculated.

[0104] 203. Determine the operating state of the first load based on the second voltage value.

[0105] Determine whether the second voltage value is within the first preset range.

[0106] If the second voltage value is within the first preset range, then the first load 60 is determined to be in normal operation.

[0107] If the second voltage value is lower than the first preset range, it is determined that the first load 60 is in a low voltage state, and the low voltage protection is activated, that is, all loads are shut down, and the zero-crossing signal is detected after the voltage returns to normal.

[0108] If the second voltage value is higher than the first preset range, it is determined that the first load 60 is in a high-voltage state, and the high-voltage protection is activated, that is, all loads are shut down, and the zero-crossing signal is detected after the voltage returns to normal.

[0109] 204. If the first load is in normal working condition, the second control circuit controls the second load to be in working condition and short-circuits the second sub-resistor so that the resistance value of the resistor unit is the third resistance value.

[0110] If the first load 60 is in normal working condition, the second control circuit 520 controls the second load 70 to be in working condition and short-circuits the second sub-resistor 220 so that the resistance value of the resistor unit 20 is the third resistance value.

[0111] When both the first load 60 and the second load 70 are working, the first sub-resistor 210 is short-circuited by the first control circuit 510, the second sub-resistor 220 is short-circuited by the second control circuit 520, and the input voltage is divided by the third sub-resistor 230 and the fourth sub-resistor 240 so that the third voltage V3 across the fourth sub-resistor 240 is V3 = Vin * R4 / (R3 + R4).

[0112] It should be noted that the multiple second resistors are not limited to the first sub-resistor 210 and the second sub-resistor 220 mentioned above. The multiple second resistors may also include other resistors. That is, the detection circuit can also control multiple loads, not just two loads. It is only necessary to connect the corresponding loads, resistors and control circuit 50 according to the connection relationship of the first sub-resistor 210, the first load 60 and the first control circuit 510.

[0113] It should be noted that the second load 70 will only be activated while the first load 60 is operating; that is, the second load 70 will only be activated when the first load 60 is in a safe state. The first load 60 can be a protective load. For example, when the household appliance 100 is a washing machine, the first load 60 can be a door lock, and the second load 70 is the spin-dry tub. The spin-dry tub will only start operating when the door lock is physically closed. Similarly, when the household appliance 100 is a heater, the first load 60 can be a door lock, and the second load 70 is the heating element. The heating element will only heat the appliance if the door lock is operating normally and without leakage. By activating the second load 70 only when the first load 60 is safe, the safety of the household appliance 100 is improved, thus enhancing user safety.

[0114] Please continue reading. Figure 4 , Figure 4 for Figure 2 The diagram illustrates the first process of determining the operating state of a load in a home appliance monitoring method. In some embodiments, after the second control circuit 520 controls the second load to be in an operating state, the monitoring method further includes the following process:

[0115] 301. Obtain the third voltage value across the first resistor.

[0116] The third voltage value across the fourth sub-resistor 240 is obtained. The specific method for obtaining the third voltage value can be found in step 104, and will not be repeated here.

[0117] 302. Determine the operating status of the first and second loads based on the third voltage value.

[0118] As can be seen from the above discussion, when the first load 60 is in working condition, the first sub-resistor 210 will be short-circuited; when the second load 70 is in working condition, the second sub-resistor 220 will be short-circuited. Therefore, whether the first load 60 and the second load 70 are in working condition can be determined from the third voltage value across the first resistor.

[0119] 303. If the third voltage value is within the first preset range, then the first load is determined to be in working condition and the second load is not in working condition.

[0120] When the third voltage value is within the first preset range, it is determined that the first load 60 is in the working state and the second load 70 is not in the working state.

[0121] It should be noted that the first preset range in this embodiment is between VDCH1 and VDCL2, wherein VDCH1 is set as the voltage threshold for high voltage detection when the first load 60 is working, and VDCL2 is set as the voltage threshold for low voltage detection when the first load 60 is working.

[0122] 304. If the third voltage value is within the second preset range, then it is determined that the first load is not in a working state and the second load is not in a working state.

[0123] It should be noted that the second preset range in this embodiment is between VDCH0 and VDCL0, wherein VDCH0 is set as the voltage threshold for high voltage detection when neither the first load 60 nor the second load 70 is working, and VDCL0 is the voltage threshold for low voltage detection when neither the first load 60 nor the second load 70 is working.

[0124] 305. If the third voltage value is within the third preset range, then the first load is determined to be in working state and the second load is determined to be in working state; wherein the first preset range, the second preset range and the third preset range do not overlap.

[0125] It should be noted that the third preset range in this embodiment is between VDCH2 and VDCL2, wherein VDCH2 is set as the voltage threshold for high voltage detection when both the first load 60 and the second load 70 are working, and VDCL2 is the voltage threshold for low voltage detection when both the first load 60 and the second load 70 are working.

[0126] It is understandable that the relationship between the first preset range, the second preset range, and the third preset range corresponds one-to-one with the relationship between the second voltage V2 = Vin*R4 / (R2+R3+R4), the first voltage V1 = Vin*R4 / (R1+R2+R3+R4), and V3 = Vin*R4 / (R3+R4) across the fourth sub-resistor 240.

[0127] It should be noted that the first preset range, the second preset range, and the third preset range do not overlap. For example, 270V is set as the high voltage detection point and 187V as the low voltage protection point. When the first load 60 is working normally, the corresponding 220V voltage waveform is set between 0.5V and 1.2V. When the voltage rises to 270V, the corresponding peak voltage of the waveform is 1.45V. When the voltage drops to 187V, the corresponding voltage is 0.345V. That is, the voltage waveform of the first load 60 from the highest voltage to the lowest voltage is set between 0.345V and 1.45V. When the second load 70 is working normally, the corresponding 220V voltage waveform is 1.7V to 2.7V. At this time, even when the first load 60 is working, the voltage fluctuates, with the voltage being 1.5V at 187V and 2.95V at 270V. That is, the voltage waveform of the first load 60 from the highest voltage to the lowest voltage is set to 1.5V to 2.95V. Therefore, there is no voltage overlap between the two situations, which can avoid misjudgment and accurately distinguish whether the first load 60 or the second load 70 is working.

[0128] Please continue reading. Figure 5 , Figure 5 for Figure 2 The illustrated second flowchart of the household appliance monitoring method for determining the operating state of a load is shown. In some embodiments, after the second control circuit 520 controls the second load to be in an operating state, the monitoring method further includes the following:

[0129] 401. Obtain the fourth voltage value across the first resistor.

[0130] For details, please refer to step 104, which will not be repeated here.

[0131] 402. Determine the operating status of the first and second loads based on the fourth voltage value.

[0132] For details, please refer to step 302, which will not be repeated here.

[0133] 403. If the first control circuit is in the conducting state, the second control circuit is not in the conducting state, and the fourth voltage value is not within the first preset range, then the first load is in an abnormal working state.

[0134] If the first control circuit 510 is detected to be in a conducting state while the second control circuit 520 is not in a conducting state, that is, the first load 60 is in a working state while the second load 70 is not in a working state, then the range of the fourth voltage value can be determined to be within the first preset range. However, if the fourth voltage value is detected to be outside the first preset range, then it can be determined that the first load 60 is in an abnormal operating state.

[0135] 404. If the first control circuit is in the on state, the second control circuit is in the on state, and the fourth voltage value is not within the third preset range, then the second control circuit is turned off, and the fifth voltage value across the first resistor is obtained.

[0136] If the first control circuit 510 and the second control circuit 520 are both detected to be in a conducting state, meaning the first load 60 and the second load 70 are both in a working state, then the range of the fourth voltage value can be determined to be within the third preset range. However, if the fourth voltage value is detected to be outside the third preset range, it indicates that at least one of the first load 60 and the second load 70 is in an abnormal operating state.

[0137] Because the second load 70 can only start when the first load 60 is working (i.e., the first load 60 can work independently, but the second load 70 cannot), the second control circuit 520 is turned off so that the second load 70 is not in operation, and the first load 60 is in an independent operating state. The fifth voltage value across the fourth sub-resistor 240 is then obtained.

[0138] 405. Determine the operating state of the first load based on the fifth voltage value.

[0139] 406. If the fifth voltage value is within the first preset range, then the first load is determined to be working normally, and the second load is not working normally.

[0140] If the fifth voltage value is within the first preset range, then the first load 60 is confirmed to be working normally. The reason why the fourth voltage value is not within the third preset range is that the second load 70 is not working normally. Therefore, it can be determined that the first load 60 is working normally and the second load 70 is not working normally.

[0141] 407. If the fifth voltage value is not within the first preset range, then the first load is determined to be in an abnormal working state.

[0142] If the fifth voltage value is not within the first preset range, it is determined that the first load 60 is in an abnormal working state. However, it is also impossible to determine whether the second load 70 is in a normal working state. The first load 60 needs to be repaired first before step 401 is re-executed.

[0143] Please continue reading. Figure 6 and Figure 7 , Figure 6 A schematic diagram of the third process of the home appliance monitoring method provided in the embodiments of this application; Figure 7 for Figure 6The circuit diagram corresponding to the household appliance monitoring method shown is illustrated. In some embodiments, the multiple loads include a third load 80 and a fourth load 90. The control circuit includes a third control circuit 530 for controlling the third load 80 and a fourth control circuit 540 for controlling the fourth load 90. The first resistor includes a fifth sub-resistor 250 and a sixth sub-resistor 260. The second resistor includes a seventh sub-resistor 270 and an eighth sub-resistor 280. The resistor unit 20 also includes a fifth resistor 290. The two ends of the fifth sub-resistor 250 are connected to the third control circuit 530. The two ends of the fifth sub-resistor 250 and the sixth sub-resistor 260 are connected to the fourth control circuit 540. One end of the fifth resistor 290 is disposed between the fifth sub-resistor 250 and the sixth sub-resistor 260, and the other end of the fifth resistor 290 is disposed between the seventh sub-resistor 270 and the eighth sub-resistor 280. The specific method flow for controlling a load to be in a working state and setting the resistance value of the resistor unit 20 to the second resistance value is as follows:

[0144] 501. Control at least one of the third control circuit and the fourth control circuit to turn on, so as to adjust the resistance value of the resistor unit.

[0145] If a zero-crossing signal is present, at least one of the third control circuit 530 and the fourth control circuit 540 is turned on to adjust the resistance value of the resistor unit 20.

[0146] For example, the third control circuit 530 is turned on to control the third load 80 to be in an operating state, and the fourth control circuit 540 is turned on to control the fourth load 90 to be in an operating state. Alternatively, the third control circuit 530 is turned on to control the third load 80 to be in an operating state, while the fourth control circuit 540 is not turned on. Alternatively, the third control circuit 530 is not turned on, while the fourth control circuit 540 is turned on to control the fourth load 90 to be in an operating state.

[0147] Among them, the resistance of the fifth sub-resistor 250 is R1, the resistance of the sixth sub-resistor 260 is R2, the resistance of the seventh sub-resistor 270 is R3, the resistance of the eighth sub-resistor 280 is R4, and the resistance of the fifth resistor 290 is R5. When neither the third control circuit 530 nor the fourth control circuit 540 is conducting the third load 80 and the fourth load 90, the fifth resistor 290 is disconnected, and both the fifth sub-resistor 250 and the sixth sub-resistor 260 are conducting. That is, the input voltage is divided by the fifth sub-resistor 250, the sixth sub-resistor 260, the seventh sub-resistor 270, and the eighth sub-resistor 280, so that the fourth voltage V4 across the eighth sub-resistor 280 is V4 = Vin * R4 / (R1 + R2 + R3 + R4).

[0148] When the third load 80 is working and the fourth load 90 is not working, the fifth sub-resistor 250 is short-circuited by the third control circuit 530, the sixth sub-resistor 260 is turned on, the sixth sub-resistor 260 and the seventh sub-resistor 270 are connected in series and then connected in parallel with the eighth sub-resistor 280. The input voltage is divided by the sixth sub-resistor 260, the seventh sub-resistor 270, the eighth sub-resistor 280 and the fifth resistor 290 so that the fifth voltage V5 across the eighth sub-resistor 280 is V5 = Vin*R4 / [(R5 / / (R2+R3))+R4].

[0149] When the third load 80 is not working and the fourth load 90 is working, the fifth sub-resistor 250 is short-circuited by the third control circuit 530, the sixth sub-resistor 260 is short-circuited by the fourth control circuit 540, the fifth resistor 290 is disconnected, the seventh sub-resistor 270 and the eighth sub-resistor 280 are connected in series, and the input voltage is divided by the seventh sub-resistor 270 and the eighth sub-resistor 280 so that the sixth voltage V6 across the eighth sub-resistor 280 is V6 = Vin*R4 / (R3+R4).

[0150] When both the third load 80 and the fourth load 90 are working, the fifth sub-resistor 250 is short-circuited by the third control circuit 530, the sixth sub-resistor 260 is short-circuited by the fourth control circuit 540, the fifth resistor 290 is turned on, the seventh sub-resistor 270 is connected in parallel with the fifth resistor 290 and then in series with the eighth sub-resistor 280. That is, the input voltage is divided by the fifth resistor 290, the seventh sub-resistor 270 and the eighth sub-resistor 280 so that the seventh voltage V7 across the eighth sub-resistor 280 is V7 = Vin*R4 / (R5 / / R3+R4).

[0151] As can be seen from the above, when the third load 80 and the fourth load 90 are in different working states, the voltage resistance across the eighth sub-resistor 280 is different.

[0152] 502. Obtain the sixth voltage value across the eighth sub-resistor.

[0153] For details, please refer to step 104, which will not be repeated here.

[0154] 503. Determine the operating status of the third and fourth loads based on the sixth voltage value.

[0155] If the sixth voltage value is within the fourth preset range, then the third load 80 is determined to be in working condition, and the fourth load 90 is not in working condition.

[0156] If the sixth voltage value is within the fifth preset range, then it is determined that the third load 80 is not in working state and the fourth load 90 is in working state.

[0157] If the sixth voltage value is within the sixth preset range, then the third load 80 and the fourth load 90 are determined to be in working condition.

[0158] If the sixth voltage value is within the seventh preset range, then it is determined that the third load 80 is not in operation and the fourth load 90 is not in operation.

[0159] Among them, the fourth preset range, the fifth preset range, the sixth preset range and the seventh preset range do not overlap.

[0160] Please continue reading. Figure 8 , Figure 8 for Figure 6 The diagram illustrates the first step of the home appliance monitoring method for determining the operating status of loads. Once it is determined that the third load 80 and the fourth load 90 are both operating, the process flow is as follows:

[0161] 601. Obtain the seventh voltage value across the eighth sub-resistor.

[0162] For details, please refer to step 104, which will not be repeated here.

[0163] 602. Determine whether the seventh voltage value is within the sixth preset range.

[0164] 603. If the seventh voltage value is not within the sixth preset range, disconnect the third control circuit and obtain the eighth voltage value across the eighth sub-resistor.

[0165] When it is determined that the third load 80 and the fourth load 90 are in working condition, and the seventh voltage value is not within the sixth preset range, it indicates that at least one of the third load 80 and the fourth load 90 is in an abnormal working condition.

[0166] Therefore, by disconnecting the third control circuit 530 or the fourth control circuit 540, the third load 80 or the fourth load 90 can be made to work independently, thus determining whether the third load 80 or the fourth load 90 is in an abnormal working state.

[0167] It should be noted that the third control circuit 530 can be disconnected first to allow the fourth load 90 to work independently, or the fourth control circuit 540 can be disconnected first to allow the third load 80 to work independently. The specific choice depends on the actual situation and no specific restrictions are imposed here.

[0168] 604. Determine whether the eighth voltage value is within the fifth preset range.

[0169] 605. If the eighth voltage value is within the fifth preset range, then the fourth load is determined to be in normal operation.

[0170] If the measured eighth voltage value is within the preset range when the fourth load 90 is working alone, it means that the fourth load 90 is working normally. If the seventh voltage value is not within the sixth preset range, it means that the third load 80 is in an abnormal working state.

[0171] 606. If the eighth voltage value is not within the fifth preset range, then the fourth load is determined to be not operating normally.

[0172] If the measured eighth voltage value of the fourth load 90 is not within the preset range when it is working alone, it indicates that the fourth load 90 is not working normally. However, further judgment is needed to determine whether the third load 80 is working normally.

[0173] For example, the fourth control circuit 540 is disconnected, and the ninth voltage value across the eighth sub-resistor 280 is obtained, and it is determined whether the ninth voltage value is within the fourth preset range.

[0174] If the ninth voltage value is within the fourth preset range, then the third load 80 is determined to be in normal operation.

[0175] If the ninth voltage value is not within the fourth preset range, then the third load 80 is determined to be not operating normally.

[0176] Please continue reading. Figure 9 , Figure 9 for Figure 6 The illustrated second flowchart of the household appliance monitoring method for determining the operating status of the load is shown. In some embodiments, after the fourth control circuit 540 turns on the fourth load 90, the monitoring method further includes the following steps:

[0177] 701. Obtain the tenth voltage value across the eighth sub-resistor.

[0178] For details, please refer to step 104, which will not be repeated here.

[0179] 702. Determine the operating status of the third and fourth loads based on the tenth voltage value.

[0180] 703. If it is determined that the third control circuit is in the conducting state, the fourth control circuit is not in the conducting state, and the tenth voltage value is not within the fourth preset range, then it is determined that the third load is in an abnormal working state.

[0181] When it is determined that the third control circuit 530 is in the conducting state and the fourth control circuit 540 is not in the conducting state, it means that the third load 80 is in the working state and the fourth load 90 is not in the working state. That is, when the third load 80 works alone, the tenth voltage value across the eighth sub-resistor 280 should be within the fourth preset range. However, the current tenth voltage value is not within the fourth preset range, which means that the third load 80 is in an abnormal working state.

[0182] 704. If it is determined that the third control circuit is not in the conducting state, the fourth control circuit is in the conducting state, and the tenth voltage value is not within the fifth preset range, then it is determined that the fourth load is in an abnormal working state.

[0183] When it is determined that the third control circuit 530 is not in the conducting state and the fourth control circuit 540 is in the conducting state, it means that the third load 80 is not in the working state and the fourth load 90 is in the working state. That is, when the fourth load 90 works alone, the tenth voltage value across the eighth sub-resistor 280 should be within the fifth preset range. However, the current tenth voltage value is not within the fifth preset range, which means that the fourth load 90 is in an abnormal working state.

[0184] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For the parts not described in detail in a certain embodiment, please refer to the detailed description of that part above, and they will not be repeated here.

[0185] This application can identify zero-crossing signals and detect the operating status of the load by detecting the voltage across the first resistor. The monitoring method in this embodiment does not rely on too many detection devices, thereby reducing energy consumption. In addition, this monitoring method does not require complex algorithm calculations, thus improving the accuracy of load monitoring. When an abnormal situation is detected in the load of household appliances, the specific load that is not operating normally can be detected by the voltage across the first resistor. This protects user safety and ensures a good user experience.

[0186] The above provides a detailed description of a method for monitoring household appliances according to embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there may be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for monitoring household appliances, characterized in that, The household appliance includes multiple loads and a detection device for detecting the multiple loads. The detection device includes a power interface, a resistor unit, and multiple control circuits for controlling the multiple loads. The resistor unit includes a first resistor and multiple second resistors connected sequentially to the power interface. The resistance value of the resistor unit can be adjusted by the multiple control circuits. The multiple loads include a first load and a second load. The control circuits include a first control circuit for controlling the first load and a second control circuit for controlling the second load. The second resistor includes a first sub-resistor connected to the first control circuit and a second sub-resistor connected to the second control circuit, and the first sub-resistor and the second sub-resistor are connected in series. The monitoring method includes: When the plurality of loads are not in operation and the resistance of the resistor unit is a first resistance value, the first voltage value across the first resistor is obtained; Determine whether there is a zero-crossing signal in the input voltage of the power interface based on the first voltage value; If a zero-crossing signal is determined to exist, the control circuit controls the load to be in an operating state and sets the resistance of the resistor unit to a second resistance value, wherein the first resistance value is not equal to the second resistance value; this includes: controlling the first control circuit to control the first load to be in an operating state and short-circuiting the first sub-resistor so that the resistance of the resistor unit is a second resistance value; obtaining a second voltage value across the first resistor; determining the operating state of the first load based on the second voltage value; if the first load is in a normal operating state, the control circuit controls the second load to be in an operating state and short-circuiting the second sub-resistor so that the resistance of the resistor unit is a third resistance value; Obtain the second voltage value across the first resistor; The operating state of the load is determined based on the second voltage value.

2. The monitoring method according to claim 1, characterized in that, After controlling the second control circuit to put the second load into a working state, the monitoring method further includes: Obtain the third voltage value across the first resistor; The operating states of the first load and the second load are determined based on the third voltage value; If the third voltage value is within the first preset range, then it is determined that the first load is in a working state and the second load is not in a working state; If the third voltage value is within the second preset range, then it is determined that the first load is not in a working state and the second load is not in a working state. If the third voltage value is within the third preset range, then the first load is determined to be in a working state, and the second load is determined to be in a working state; wherein the first preset range, the second preset range, and the third preset range do not overlap.

3. The monitoring method according to claim 1, characterized in that, After controlling the second control circuit to put the second load into a working state, the monitoring method further includes: Obtain the fourth voltage value across the first resistor; The operating states of the first load and the second load are determined based on the fourth voltage value; If the first control circuit is in the on state, the second control circuit is not in the on state, and the fourth voltage value is not within the first preset range, then the first load is in an abnormal working state. If the first control circuit is in the on state, the second control circuit is in the on state, and the fourth voltage value is not within the third preset range, then the second control circuit is turned off, and the fifth voltage value across the first resistor is obtained. The operating state of the first load is determined based on the fifth voltage value; If the fifth voltage value is within the first preset range, then it is determined that the first load is working normally and the second load is not working normally. If the fifth voltage value is not within the first preset range, then the first load is determined to be in an abnormal working state.

4. The monitoring method according to claim 1, characterized in that, The plurality of loads includes a third load and a fourth load. The control circuit includes a third control circuit for controlling the third load and a fourth control circuit for controlling the fourth load. The second resistor includes a fifth sub-resistor and a sixth sub-resistor. The first resistor includes a seventh sub-resistor and an eighth sub-resistor. The resistor unit further includes a fifth resistor. The two ends of the fifth sub-resistor are connected to the third control circuit. The two ends of the fifth sub-resistor and the sixth sub-resistor are connected to the fourth control circuit. One end of the fifth resistor is disposed between the fifth sub-resistor and the sixth sub-resistor. The other end of the fifth resistor is disposed between the seventh sub-resistor and the eighth sub-resistor. The control circuit controls the load to be in an operating state and makes the resistance value of the resistor unit a second resistance value, including: At least one of the third control circuit and the fourth control circuit is turned on to adjust the resistance value of the resistor unit; Obtain the sixth voltage value across the eighth sub-resistor; The operating states of the third load and the fourth load are determined based on the sixth voltage value.

5. The monitoring method according to claim 4, characterized in that, Determining the operating states of the third load and the fourth load based on the sixth voltage value includes: If the sixth voltage value is within the fourth preset range, then the third load is determined to be in a working state, and the fourth load is not in a working state. If the sixth voltage value is within the fifth preset range, then it is determined that the third load is not in a working state and the fourth load is in a working state. If the sixth voltage value is within the sixth preset range, then it is determined that the third load is in a working state and the fourth load is in a working state. If the sixth voltage value is within the seventh preset range, then it is determined that the third load is not in a working state and the fourth load is not in a working state. The fourth preset range, the fifth preset range, the sixth preset range, and the seventh preset range do not overlap.

6. The monitoring method according to claim 5, characterized in that, After determining that the third load is in a working state and the fourth load is in a working state, the method includes: Obtain the seventh voltage value across the eighth sub-resistor; Determine whether the seventh voltage value is within the sixth preset range; If the seventh voltage value is not within the sixth preset range, then the third control circuit is disconnected, and the eighth voltage value across the eighth sub-resistor is obtained; Determine whether the eighth voltage value is within the fifth preset range; If the eighth voltage value is within the fifth preset range, then the fourth load is determined to be operating normally. If the eighth voltage value is not within the fifth preset range, then it is determined that the fourth load is not operating normally.

7. The monitoring method according to claim 6, characterized in that, After determining that the fourth load is not functioning properly, the monitoring method further includes: Disconnect the fourth control circuit and obtain the ninth voltage value across the eighth sub-resistor; Determine whether the ninth voltage value is within the fourth preset range; If the ninth voltage value is within the fourth preset range, then the third load is determined to be operating normally. If the ninth voltage value is not within the fourth preset range, then the third load is determined to be not operating normally.

8. The monitoring method according to claim 6, characterized in that, After controlling the fourth control circuit to turn on the fourth load, the monitoring method further includes: Obtain the tenth voltage value across the eighth sub-resistor; The operating states of the third load and the fourth load are determined based on the tenth voltage value; If it is determined that the third control circuit is in the conducting state, the fourth control circuit is not in the conducting state, and the tenth voltage value is not within the fourth preset range, then it is determined that the third load is in an abnormal working state. If it is determined that the third control circuit is not in a conducting state, the fourth control circuit is in a conducting state, and the tenth voltage value is not within the fifth preset range, then it is determined that the fourth load is in an abnormal working state.

9. The monitoring method according to claim 1, characterized in that, Determining the operating state of the first load based on the second voltage value includes: Within a first preset time period, the voltage signal across the first resistor is continuously acquired n times to obtain multiple first voltage signals; The second voltage value is obtained by averaging multiple first voltage signals. Determine whether the second voltage value is within the first preset range; If the second voltage value is within the first preset range, then the first load is determined to be operating normally; If the second voltage value is lower than the first preset range, it is determined that the first load is in a low-voltage state, and low-voltage protection is activated; If the second voltage value is higher than the first preset range, it is determined that the first load is in a high-voltage state, and high-voltage protection is activated.

Images