Filter circuit, household appliance, control method and computer readable storage medium

Abstract

The invention discloses a filter circuit, a household electrical appliance, a control method and a computer readable storage medium, the filter circuit comprises a first resistor and a first capacitor, two ends of the first resistor are respectively connected with a first live wire end and a second live wire end, the first resistor is connected in series with the first capacitor, and two ends of the first capacitor are respectively connected with the second live wire end and a zero line end. The two ends of the first capacitor form output ends used for being connected with the motor, and the filter circuit is configured to form a charging loop through the first live wire end, the first resistor, the first capacitor and the null line end to charge the first capacitor, and form a power supply loop through the second live wire end, the motor and the null line end to supply power to the motor when the first capacitor meets a preset charging condition. According to the filter circuit, the first resistor connected in series with the first capacitor can reduce the current for charging the first capacitor, when the motor is powered, the current for charging the first capacitor is very small, the first capacitor is not damaged, and the filtering effect is not influenced because the first resistor is not connected.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a filter circuit, a household appliance, a control method and a computer-readable storage medium. Background Art

[0002] The starting method of synchronous motors is generally direct starting, which will cause the motor to be subject to greater voltage interference during starting. The filtering effect of the voltage interference can be achieved by adding corresponding filtering elements, but the filtering elements will be damaged due to the excessive starting current generated during starting. If the corresponding current limiting elements are added to reduce the starting current, the filtering effect of the filtering elements on the voltage interference will be affected. Summary of the invention

[0003] The invention provides a filtering circuit, a household appliance, a control method and a computer-readable storage medium.

[0004] A filter circuit provided in an embodiment of the present invention is used for a motor, and the filter circuit includes:

[0005] A first resistor, one end of the first resistor is connected to the first live wire terminal, and the other end of the first resistor is connected to the second live wire terminal; and

[0006] a first capacitor, the first resistor is connected in series with the first capacitor, one end of the first capacitor is connected to the second live wire end, the other end of the first capacitor is connected to the neutral wire end, and both ends of the first capacitor form output ends respectively, and the output ends are used to connect the motor;

[0007] The filtering circuit is configured to form a charging circuit through the first live wire terminal, the first resistor, the first capacitor and the neutral wire terminal to charge the first capacitor, and to form a power supply circuit through the second live wire terminal, the motor and the neutral wire terminal to power the motor through the output terminal when the first capacitor meets a preset charging condition.

[0008] The above-mentioned filtering circuit charges the first capacitor by forming a charging circuit before starting the motor, and the first resistor connected in series with the first capacitor can reduce the current for charging the first capacitor; after a certain amount of charge has been stored in the first capacitor, a power supply circuit is formed to power the motor. At this time, the current for charging the first capacitor is very small and will not damage the first capacitor, and the first resistor is not connected in the power supply circuit, which will not affect the filtering effect of the first capacitor.

[0009] In some embodiments, the preset charging condition includes:

[0010] The duration of charging the first capacitor reaches a first preset duration. This is helpful to improve controllability.

[0011] In some embodiments, the filter circuit is connected to one end of a preset power supply through the first live wire terminal and the second live wire terminal, and is connected to the other end of the preset power supply through the neutral wire terminal. This is beneficial to improving circuit safety.

[0012] In some embodiments, the filtering circuit includes:

[0013] a first switch connected to the first live wire terminal to connect or disconnect a path between the first live wire terminal and a first preset power source; and

[0014] a second switch, the second switch being connected to the second live wire terminal to switch on or off a path between the second live wire terminal and a second preset power source;

[0015] The filter circuit is configured to form the charging circuit by closing the first switch, and to form the power supply circuit by closing the second switch when the first capacitor meets the preset charging condition. This is conducive to ensuring the starting speed of the motor.

[0016] In some embodiments, when the first capacitor meets the preset charging condition, the first switch is configured to be opened within a second preset time after the second switch is closed. In this way, the influence of the first resistor on the filtering effect of the first capacitor can be reduced.

[0017] A household appliance provided in an embodiment of the present invention includes:

[0018] Motor; and

[0019] The filter circuit described in any one of the above embodiments.

[0020] The above-mentioned household appliance charges the first capacitor by forming a charging circuit before starting the motor, and the first resistor connected in series with the first capacitor can reduce the current for charging the first capacitor; after a certain amount of charge has been stored in the first capacitor, the motor is powered by forming a power supply circuit. At this time, the current for charging the first capacitor is very small and will not damage the first capacitor, and the first resistor is not connected in the power supply circuit, which will not affect the filtering effect of the first capacitor.

[0021] A control method provided in an embodiment of the present invention is used for a household appliance, wherein the household appliance includes a filter circuit and a motor, and the filter circuit includes:

[0022] A first resistor, one end of the first resistor is connected to the first live wire terminal, and the other end of the first resistor is connected to the second live wire terminal; and

[0023] a first capacitor, the first resistor is connected in series with the first capacitor, one end of the first capacitor is connected to the second live wire end, the other end of the first capacitor is connected to the neutral wire end, and both ends of the first capacitor form output ends respectively, and the output ends are used to connect the motor;

[0024] The control method comprises:

[0025] Connecting the first live wire terminal and the neutral wire terminal to charge the first capacitor;

[0026] When it is determined that the first capacitor meets a preset charging condition, the second live wire terminal and the neutral wire terminal are connected to supply power to the motor through the output terminal.

[0027] In the above control method, before starting the motor, a charging circuit is formed to charge the first capacitor, and the first resistor connected in series with the first capacitor can reduce the current for charging the first capacitor; after a certain amount of charge has been stored in the first capacitor, a power supply circuit is formed to power the motor. At this time, the current for charging the first capacitor is very small and will not damage the first capacitor, and the first resistor is not connected in the power supply circuit, which will not affect the filtering effect of the first capacitor.

[0028] In some embodiments, the control method comprises:

[0029] When it is determined that the first live wire terminal is connected, controlling the motor to remain in an off state;

[0030] When it is determined that the second live wire terminal is connected, the motor is controlled to enter the on state, so that the start timing of the motor can be conveniently determined.

[0031] In some embodiments, the control method comprises:

[0032] When the first capacitor meets the preset charging condition, the connection with the first live terminal is disconnected within a second preset time after the second live terminal is connected. In this way, the influence of the first resistor on the filtering effect of the first capacitor can be reduced.

[0033] A household appliance provided in an embodiment of the present invention includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the control method described in any one of the above embodiments can be implemented.

[0034] The above-mentioned household appliance charges the first capacitor by forming a charging circuit before starting the motor, and the first resistor connected in series with the first capacitor can reduce the current for charging the first capacitor; after a certain amount of charge has been stored in the first capacitor, the motor is powered by forming a power supply circuit. At this time, the current for charging the first capacitor is very small and will not damage the first capacitor, and the first resistor is not connected in the power supply circuit, which will not affect the filtering effect of the first capacitor.

[0035] An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the control method described in any one of the above embodiments can be implemented.

[0036] The above-mentioned household appliance charges the first capacitor by forming a charging circuit before starting the motor, and the first resistor connected in series with the first capacitor can reduce the current for charging the first capacitor; after a certain amount of charge has been stored in the first capacitor, the motor is powered by forming a power supply circuit. At this time, the current for charging the first capacitor is very small and will not damage the first capacitor, and the first resistor is not connected in the power supply circuit, which will not affect the filtering effect of the first capacitor.

[0037] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0039] Figure 1 is a schematic diagram of a partial circuit structure of a household appliance according to an embodiment of the present invention;

[0040] Figure 2 is a schematic diagram of another part of the circuit structure of the household appliance according to the embodiment of the present invention;

[0041] Figure 3 is a flow chart of a control method according to an embodiment of the present invention;

[0042] Figure 4 is a module diagram of a household appliance according to an embodiment of the present invention;

[0043] Figure 5 is another flow chart of the control method according to an embodiment of the present invention.

[0044] Description of main component symbols:

[0045] Filter circuit-10, first resistor-11, first live wire terminal-12, second live wire terminal-13, first capacitor-14, neutral wire terminal-15, first switch-16, second switch-17, output terminal-18;

[0046] Motor - 20;

[0047] Preset power source-30, first preset power source-31, second preset power source-32;

[0048] Household appliance-40, control module-41. DETAILED DESCRIPTION

[0049] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0050] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0051] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, apparatus or device (such as a computer-based system, a system including a processing module, or other system that can fetch instructions from an instruction execution system, apparatus or device and execute instructions), or used in combination with these instruction execution systems, apparatuses or devices.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0053] Please refer to Figure 1A filter circuit 10 according to an embodiment of the present invention is used for a motor 20. The filter circuit 10 includes a first resistor 11 and a first capacitor 14. One end of the first resistor 11 is connected to a first live wire terminal 12, and the other end of the first resistor 11 is connected to a second live wire terminal 13. The first resistor 11 is connected in series with the first capacitor 14. One end of the first capacitor 14 is connected to the second live wire terminal 13, and the other end of the first capacitor 14 is connected to a neutral wire terminal 15. Both ends of the first capacitor 14 form output terminals 18, respectively, and the output terminals 18 are used to connect to the motor 20.

[0054] The filter circuit 10 is configured to form a charging circuit through the first live wire terminal 12, the first resistor 11, the first capacitor 14 and the neutral wire terminal 15 to charge the first capacitor 14, and to form a power supply circuit through the second live wire terminal 13, the motor 20 and the neutral wire terminal 15 to power the motor 20 through the output terminal 18 when the first capacitor 14 meets a preset charging condition.

[0055] The above-mentioned filtering circuit 10 charges the first capacitor 14 by forming a charging circuit before starting the motor 20. The first resistor 11 connected in series with the first capacitor 14 can reduce the current when charging the first capacitor 14. After a certain amount of charge has been stored in the first capacitor 14, a power supply circuit is formed to supply power to the motor 20. At this time, the current formed by charging the first capacitor 14 is very small and will not damage the first capacitor 14. In addition, the first resistor 11 is not connected in the power supply circuit, which will not affect the filtering effect of the first capacitor 14.

[0056] Specifically, in Figure 1 In the illustrated embodiment, before the motor 20 needs to be started, the first live wire terminal 12 can be connected to the positive pole of the external power supply, and the neutral wire terminal 15 can be connected to the negative pole of the external power supply, so that the external power supply is connected in series with the first resistor 11 and the first capacitor 14 through the first live wire terminal 12 and the neutral wire terminal 15, so as to form a charging circuit for the first capacitor 14. When the first capacitor 14 is connected to the charging circuit, the charge provided by the external power supply can be charged, so that the corresponding amount of charge is stored in the first capacitor 14. When the first capacitor 14 is charged, a charging current for the first capacitor 14 will be generated in the power supply circuit. Since the first resistor 11 is also connected in series in the charging circuit, the first resistor 11 has a current limiting effect in the charging circuit, which can reduce the charging current in the charging circuit, thereby providing a protection effect for the first capacitor 14 and preventing the charging current from being too large and causing damage to the first capacitor 14.

[0057] When the first capacitor 14 meets the preset charging condition, it can be determined that the corresponding amount of charge has been stored in the first capacitor 14, so that the first live wire terminal 12 can be connected to the positive pole of the external power supply, and the neutral wire terminal 15 can be connected to the negative pole of the external power supply, so that the external power supply is connected to the motor 20 in series through the second live wire terminal 13 and the neutral wire terminal 15, forming a power supply circuit for the motor 20. In the power supply circuit, the first capacitor 14 is connected in parallel with the motor 20, and the external power supply supplies power to the motor 20. In the case of voltage interference in the power supply circuit, the energy in the voltage interference can be absorbed by the first capacitor 14 to achieve the effect of reducing the voltage interference. When starting the motor 20, even if a charging current for the first capacitor 14 is still generated in the power supply circuit, the size of the charging current will be reduced due to the corresponding amount of charge stored in the first capacitor 14, and the first capacitor 14 will not be damaged, and the first resistor 11 is not connected in the power supply circuit, so that the first resistor 11 will not affect the filtering effect of the first capacitor 14. The external power supply can be provided by the mains.

[0058] In addition, in some embodiments, the motor 20 may include a motor circuit, a stator, and a rotor. Specifically, the motor circuit of the motor 20 may be electrically connected to the stator and the rotor. When the motor 20 is controlled to be turned on, the motor circuit of the motor 20 may be energized through the power supply circuit, thereby driving the rotor to rotate relative to the stator.

[0059] In some embodiments, the preset charging condition includes that the duration of charging the first capacitor 14 reaches a first preset duration.

[0060] This helps improve controllability.

[0061] It can be understood that the amount of charge in the first capacitor 14 will gradually increase over time during charging, and the law of the increase in the amount of charge can also be determined, so that the degree of charge storage in the first capacitor 14 can be determined according to the duration of charging the first capacitor 14. After the first capacitor 14 stores a certain amount of charge, it can have the conditions for connecting to the circuit for powering the motor 20, and the charging current generated after the connection is also small enough. On the basis of the above, when the duration of charging the first capacitor 14 reaches the first preset duration, it can be determined that the first capacitor 14 can be connected to the power supply circuit, so that the filter circuit 10 can be adjusted to power the motor 20 through the second live wire terminal 13 and the neutral wire terminal 15, so as to facilitate the determination of the control timing for adjusting the filter circuit 10, which is conducive to improving controllability.

[0062] In addition, the first preset duration can be determined according to the specific situation, or can be calibrated through actual testing. In some embodiments, the first preset duration can be determined by the capacitance value of the first capacitor 14, the resistance value of the first resistor 11, and the allowable charge of the first capacitor 14. The allowable charge of the first capacitor 14 can be the minimum charge stored when the first capacitor 14 can be connected to the power supply circuit. In one embodiment, the first preset duration can be 1 second.

[0063] Please refer to Figure 1 In some embodiments, the filter circuit 10 is connected to one end of the preset power supply 30 through the first live wire terminal 12 and the second live wire terminal 13 , and is connected to the other end of the preset power supply 30 through the neutral wire terminal 15 .

[0064] This is helpful to improve circuit safety.

[0065] Specifically, on the basis of the aforementioned embodiment, the external power supply may be a preset power supply 30. It is understood that the filter circuit 10 may be connected to one end of the preset power supply 30 through the first live wire terminal 12 so that the preset power supply 30 charges the first capacitor 14, and may be connected to one end of the preset power supply 30 through the second live wire terminal 13 so that the preset power supply 30 supplies power to the motor 20. Even if the first live wire terminal 12 and the second live wire terminal 13 are simultaneously connected to one end of the preset power supply 30, there will be no voltage difference between the first live wire terminal 12 and the second live wire terminal 13, thereby avoiding reverse charging between the external power supply connected to the first live wire terminal 12 and the external power supply connected to the second live wire terminal 13, which is ultimately beneficial to improving circuit safety.

[0066] Please refer to Figure 2 In some embodiments, the filter circuit 10 includes a first switch 16 and a second switch 17. The first switch 16 is connected to the first live wire terminal 12 to conduct or disconnect the path between the first live wire terminal 12 and the first preset power source 31. The second switch 17 is connected to the second live wire terminal 13 to conduct or disconnect the path between the second live wire terminal 13 and the second preset power source 32.

[0067] The filter circuit 10 is configured to form a charging loop by closing the first switch 16 , and to form a power supply loop by closing the second switch 17 when the first capacitor 14 meets a preset charging condition.

[0068] This is helpful to ensure the starting speed of the motor 20.

[0069] Specifically, in Figure 2In the illustrated embodiment, the first switch 16 is connected to the positive electrode of the first preset power supply 31, the second switch 17 is connected to the positive electrode of the second preset power supply 32, and the neutral terminal 15 is connected to the negative electrode of the first preset power supply 31 and the negative electrode of the second preset power supply 32. In the case where the motor 20 needs to be started, the first switch 16 can be controlled to close and connect the first live terminal 12 and the positive electrode of the first preset power supply 31, so as to charge the first capacitor 14 through the first preset power supply 31. In the case of determining that the first capacitor 14 meets the preset charging condition, the second switch 17 can be controlled to close and connect the second live terminal 13 and the positive electrode of the second preset power supply 32, and the motor 20 can be controlled to start, so as to power the motor 20 through the second preset power supply 32.

[0070] On the basis of the above-mentioned implementation mode, the charging circuit and the power supply circuit are respectively formed by closing the first switch 16 and closing the second switch 17, and the first switch 16 and the second switch 17 are in different circuits and are independent of each other, so that it is easy to control the opening and closing of the first switch 16 and the second switch 17 respectively, so as to facilitate the rapid switching between the charging circuit and the power supply circuit, and will not increase the delayed starting time of the motor 20 due to the need to charge the first capacitor 14, which is beneficial to ensure the starting speed of the motor 20.

[0071] In addition, please combine Figure 1 ,exist Figure 1 In the illustrated embodiment, the first preset power source 31 and the second preset power source 32 are both preset power sources 30 .

[0072] Please refer to Figure 1 and Figure 2 In some embodiments, when the first capacitor 14 meets a preset charging condition, the first switch 16 is configured to be disconnected within a second preset time period after the second switch 17 is closed.

[0073] In this way, the influence of the first resistor 11 on the filtering effect of the first capacitor 14 can be reduced.

[0074] Specifically, it can be understood that within a period of time after the second switch 17 is closed, the filter circuit 10 is in a state of supplying power to the motor 20 through the first preset power supply 31 and the second preset power supply 32. At this time, the first resistor 11 is connected in the circuit, which is easy to affect the filtering effect of the first capacitor 14. In this case, by disconnecting the first switch 16 within the second preset time after the second switch 17 is closed, the charging current of the first capacitor 14 will not be too large in a short time, and the connection between the first resistor 11 and the first capacitor 14 can be disconnected in time, so that the influence of the first resistor 11 on the filtering effect of the first capacitor 14 can be reduced as much as possible.

[0075] Please refer to Figure 1 and Figure 2A household appliance 40 according to an embodiment of the present invention includes a motor 20 and a filter circuit 10 according to any one of the above embodiments.

[0076] The household appliance 40, before starting the motor 20, charges the first capacitor 14 by forming a charging circuit. The first resistor 11 connected in series with the first capacitor 14 can reduce the current when charging the first capacitor 14. After a certain amount of charge has been stored in the first capacitor 14, the power supply circuit is formed to supply power to the motor 20. At this time, the current formed by charging the first capacitor 14 is very small and will not damage the first capacitor 14. In addition, the first resistor 11 is not connected in the power supply circuit, which will not affect the filtering effect of the first capacitor 14.

[0077] Specifically, please combine Figure 1 and Figure 2 When the household appliance 40 needs to control the motor 20 to turn on, the first capacitor 14 can be energized through the first live wire terminal 12 and the neutral wire terminal 15 to pre-charge the first capacitor 14. When the first capacitor 14 meets the preset charging conditions, the motor 20 can be connected through the second live wire terminal 13 and the neutral wire terminal 15. At this time, the motor 20 is controlled to turn on, and the first capacitor 14 is connected in parallel with the motor 20 to filter out voltage interference to the motor 20, and no large charging current will be generated on the first capacitor 14.

[0078] In some embodiments, the household appliance 40 may include a dishwasher, a refrigerator, a microwave, an oven, a washing machine, and an air conditioner.

[0079] Please refer to Figure 1-Figure 3 A control method according to an embodiment of the present invention is used for a household appliance 40. The household appliance 40 includes a filter circuit 10 and a motor 20. The filter circuit 10 includes a first resistor 11 and a first capacitor 14. One end of the first resistor 11 is connected to a first live wire terminal 12, and the other end of the first resistor 11 is connected to a second live wire terminal 13. The first resistor 11 is connected in series with the first capacitor 14. One end of the first capacitor 14 is connected to the second live wire terminal 13, and the other end of the first capacitor 14 is connected to a neutral wire terminal 15. Both ends of the first capacitor 14 form output terminals 18, respectively, and the output terminals 18 are used to connect to the motor 20. The control method includes:

[0080] 01: connecting the first live wire terminal 12 and the neutral wire terminal 15 to charge the first capacitor 14;

[0081] 03: When it is determined that the first capacitor 14 meets the preset charging condition, the second live wire terminal 13 and the neutral wire terminal 15 are connected to supply power to the motor 20 through the output terminal 18 .

[0082] The control method of the embodiment of the present invention can be implemented by the household appliance 40 of the embodiment of the present invention. Figure 4The household appliance 40 includes a control module 41. The control module 41 is used to: connect the first live wire terminal 12 and the neutral wire terminal 15 to charge the first capacitor 14; and connect the second live wire terminal 13 and the neutral wire terminal 15 to supply power to the motor 20 through the output terminal 18 when it is determined that the first capacitor 14 meets the preset charging condition.

[0083] In the above control method, before starting the motor 20, the first capacitor 14 is charged by forming a charging circuit, and the first resistor 11 connected in series with the first capacitor 14 can reduce the current when the first capacitor 14 is charged; after a certain amount of charge has been stored in the first capacitor 14, the motor 20 is powered by forming a power supply circuit. At this time, the current formed by charging the first capacitor 14 is very small and will not damage the first capacitor 14. In addition, the first resistor 11 is not connected in the power supply circuit, which will not affect the filtering effect of the first capacitor 14.

[0084] Specifically, please combine Figure 1 , Figure 2 and Figure 4 In the illustrated embodiment, the filter circuit 10 includes a first switch 16 and a second switch 17. The first switch 16 is connected to the first live wire terminal 12, and can be used to conduct or disconnect the path between the first live wire terminal 12 and the external power supply. The second switch 17 is connected to the second live wire terminal 13, and can be used to conduct or disconnect the path between the second live wire terminal 13 and the external power supply. The control module 41 can control the first switch 16 to close, so that the external power supply connects the first live wire terminal 12 and the neutral wire terminal 15 to charge the first capacitor 14, and can control the first switch 16 to open, so that the external power supply is disconnected from the first live wire terminal 12. The control module 41 can control the second switch 17 to close, so that the external power supply connects the second live wire terminal 13 and the neutral wire terminal 15 to power the motor 20, and can control the second switch 17 to open, so that the external power supply is disconnected from the second live wire terminal 13.

[0085] In some embodiments, the first switch 16 and / or the second switch 17 may include a relay, a bipolar junction transistor (BJT), a field effect transistor (FET), or a metal oxide semiconductor field effect transistor (MOSFET).

[0086] Please refer to Figure 5 In some embodiments, the control method comprises:

[0087] 02: When it is determined that the first live wire terminal 12 is connected, the motor 20 is controlled to remain in the off state;

[0088] 04: When it is determined that the second live wire terminal 13 is connected, the motor 20 is controlled to enter the on state.

[0089] The control method of the embodiment of the present invention can be implemented by the household appliance 40 of the embodiment of the present invention. Figure 4 The control module 41 is used to: when it is determined that the first live wire terminal 12 is connected, control the motor 20 to remain in the closed state; when it is determined that the second live wire terminal 13 is connected, control the motor 20 to enter the open state.

[0090] In this way, the starting timing of the motor 20 can be conveniently determined.

[0091] It can be understood that when the first live wire terminal 12 is connected, the first capacitor 14 is charged, and the motor 20 is controlled to remain in the off state, which can avoid directly forming a circuit for powering the motor 20. When the second live wire terminal 13 is connected, the first capacitor 14 has basically completed charging, and the motor 20 is controlled to enter the on state, so that the first capacitor 14 filters the voltage interference in the power supply circuit, thereby providing a good power supply environment for the operation of the motor 20.

[0092] In certain embodiments, the control method comprises:

[0093] When the first capacitor 14 meets the preset charging condition, the connection with the first live terminal 12 is disconnected within a second preset time period after the second live terminal 13 is connected.

[0094] The control method of the embodiment of the present invention can be implemented by the household appliance 40 of the embodiment of the present invention. Figure 4 The control module 41 is used to: when the first capacitor 14 meets the preset charging condition, disconnect the connection with the first live wire terminal 12 within a second preset time after the second live wire terminal 13 is connected.

[0095] In this way, the influence of the first resistor 11 on the filtering effect of the first capacitor 14 can be reduced.

[0096] Specifically, please combine Figure 1 and Figure 2 Based on the aforementioned implementation, it can be known that the control module 41 can connect the second live wire terminal 13 by closing the second switch 17, and can cut off the connection with the first live wire terminal 12 by opening the first switch 16. The specific implementation principle can be referred to the aforementioned implementation, which will not be repeated here.

[0097] A household appliance 40 according to an embodiment of the present invention includes a memory and a processor. The memory stores a computer program. When the processor executes the computer program, the steps of the control method according to any one of the above embodiments can be implemented.

[0098] For example, when the computer program is executed by a processor, the control methods that can be implemented include:

[0099] 01: connecting the first live wire terminal 12 and the neutral wire terminal 15 to charge the first capacitor 14;

[0100] 03: When it is determined that the first capacitor 14 meets the preset charging condition, the second live wire terminal 13 and the neutral wire terminal 15 are connected to supply power to the motor 20 through the output terminal 18 .

[0101] The household appliance 40, before starting the motor 20, charges the first capacitor 14 by forming a charging circuit. The first resistor 11 connected in series with the first capacitor 14 can reduce the current when charging the first capacitor 14. After a certain amount of charge has been stored in the first capacitor 14, the power supply circuit is formed to supply power to the motor 20. At this time, the current formed by charging the first capacitor 14 is very small and will not damage the first capacitor 14. In addition, the first resistor 11 is not connected in the power supply circuit, which will not affect the filtering effect of the first capacitor 14.

[0102] Specifically, please combine Figure 1 and Figure 2 When the household appliance 40 needs to control the motor 20 to turn on, the first capacitor 14 can be energized through the first live wire terminal 12 and the neutral wire terminal 15 to pre-charge the first capacitor 14. When the first capacitor 14 meets the preset charging conditions, the motor 20 can be connected through the second live wire terminal 13 and the neutral wire terminal 15. At this time, the motor 20 is controlled to turn on, and the first capacitor 14 is connected in parallel with the motor 20 to filter out voltage interference to the motor 20, and no large charging current will be generated on the first capacitor 14.

[0103] In some embodiments, the household appliance 40 may include a dishwasher, a refrigerator, a microwave, an oven, a washing machine, and an air conditioner.

[0104] A computer-readable storage medium according to an embodiment of the present invention stores a computer program, which, when executed by a processor, can implement the steps of the control method according to any one of the above embodiments.

[0105] For example, when the computer program is executed by a processor, the control methods that can be implemented include:

[0106] 01: connecting the first live wire terminal 12 and the neutral wire terminal 15 to charge the first capacitor 14;

[0107] 03: When it is determined that the first capacitor 14 meets the preset charging condition, the second live wire terminal 13 and the neutral wire terminal 15 are connected to supply power to the motor 20 through the output terminal 18 .

[0108] The above-mentioned computer-readable storage medium charges the first capacitor 14 by forming a charging circuit before starting the motor 20. The first resistor 11 connected in series with the first capacitor 14 can reduce the current when charging the first capacitor 14. After a certain amount of charge has been stored in the first capacitor 14, a power supply circuit is formed to power the motor 20. At this time, the current formed by charging the first capacitor 14 is very small and will not damage the first capacitor 14. In addition, the first resistor 11 is not connected in the power supply circuit, which will not affect the filtering effect of the first capacitor 14.

[0109] The computer-readable storage medium may be provided in the household appliance 40 or in other terminals. The household appliance 40 may communicate with other terminals to obtain corresponding programs.

[0110] It can be understood that computer-readable storage media may include: any entity or device capable of carrying a computer program, recording media, USB flash drives, mobile hard disks, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), and software distribution media, etc. A computer program includes computer program code. The computer program code may be in source code form, object code form, executable file, or some intermediate form, etc. A computer-readable storage medium may include: any entity or device capable of carrying a computer program code, recording media, USB flash drives, mobile hard disks, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), and software distribution media.

[0111] In certain embodiments of the present invention, the control module 41 may be a single-chip microcomputer chip that integrates a processor, a memory, a communication module, etc. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0112] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A filter circuit for a motor, characterized in that: The filtering circuit comprises: A first resistor, one end of the first resistor is connected to the first live wire terminal, and the other end of the first resistor is connected to the second live wire terminal; and a first capacitor, the first resistor is connected in series with the first capacitor, one end of the first capacitor is connected to the second live wire end, the other end of the first capacitor is connected to the neutral wire end, and both ends of the first capacitor form output ends respectively, and the output ends are used to connect the motor; The filtering circuit is configured to form a charging circuit through the first live wire terminal, the first resistor, the first capacitor and the neutral wire terminal to charge the first capacitor, and to form a power supply circuit through the second live wire terminal, the motor and the neutral wire terminal to power the motor through the output terminal when the first capacitor meets a preset charging condition.

2. The filter circuit according to claim 1, characterized in that: The preset charging conditions include: The duration of charging the first capacitor reaches a first preset duration.

3. The filter circuit according to claim 1, characterized in that: The filter circuit is connected to one end of a preset power supply through the first live wire terminal and the second live wire terminal, and is connected to the other end of the preset power supply through the neutral wire terminal.

4. The filter circuit according to claim 1, characterized in that: The filtering circuit comprises: a first switch connected to the first live wire terminal to connect or disconnect a path between the first live wire terminal and a first preset power source; and a second switch, the second switch being connected to the second live wire terminal to switch on or off a path between the second live wire terminal and a second preset power source; The filter circuit is configured to form the charging loop by closing the first switch, and to form the power supply loop by closing the second switch when the first capacitor meets the preset charging condition.

5. The filter circuit according to claim 4, characterized in that: When the first capacitor meets the preset charging condition, the first switch is configured to be opened within a second preset time period after the second switch is closed.

6. A household appliance, characterized in that: include: Motor; and The filter circuit according to any one of claims 1 to 5.

7. A control method for household appliances, characterized in that: The household appliance comprises a filter circuit and a motor, wherein the filter circuit comprises: A first resistor, one end of which is connected to the first live wire terminal, and the other end of which is connected to the second live wire terminal; and a first capacitor, the first resistor is connected in series with the first capacitor, one end of the first capacitor is connected to the second live wire end, the other end of the first capacitor is connected to the neutral wire end, and both ends of the first capacitor form output ends respectively, and the output ends are used to connect the motor; The control method comprises: Connecting the first live wire terminal and the neutral wire terminal to charge the first capacitor; When it is determined that the first capacitor meets a preset charging condition, the second live wire terminal and the neutral wire terminal are connected to supply power to the motor through the output terminal.

8. The control method according to claim 7, characterized in that: The control method comprises: When it is determined that the first live wire terminal is connected, controlling the motor to remain in an off state; When it is determined that the second live wire terminal is connected, the motor is controlled to enter an on state.

9. The control method according to claim 7, characterized in that: The control method comprises: When the first capacitor meets the preset charging condition, the connection with the first live wire terminal is disconnected within a second preset time period after the second live wire terminal is connected.

10. A household appliance, characterized in that: It comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the control method according to any one of claims 7 to 9 can be implemented.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it can implement the steps of the control method described in any one of claims 7 to 9.

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