CN113391588A - Household appliance, self-checking control method and system thereof and storage medium - Google Patents
Household appliance, self-checking control method and system thereof and storage medium Download PDFInfo
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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Abstract
The invention discloses a household appliance, a self-checking control method and a self-checking control system thereof and a storage medium. The household appliance comprises at least one weak electric load and a low-voltage power supply for supplying power to each weak electric load, and the method comprises the following steps: controlling the at least one weak current load to start to work, and detecting current change information when the low-voltage power supply supplies power; and judging whether the at least one weak current load normally operates or not according to the current change information. According to the self-checking control method of the household appliance equipment, whether the weak current loads normally operate after being started can be judged through the current change information, the current change information is low in obtaining cost and high in reliability, so that a feedback signal does not need to be added to each weak current load forcibly, the development and manufacturing cost of the household appliance equipment is reduced, meanwhile, the current change information is convenient to compare and judge, occupation of the household appliance equipment on the operation resources of the main control chip in the self-checking process is reduced, and smooth operation of the household appliance equipment is guaranteed.
Description
Technical Field
The invention relates to the field of household appliances, in particular to a household appliance, a self-checking control method and a self-checking control system thereof and a storage medium.
Background
In the related art, the main weak current loads (e.g., electronic expansion valve, stepping motor, dc pump, UV lamp, etc.) in the air conditioner do not have the function of feeding back to the main control chip, the main control chip can only send control signals to the weak current loads, and cannot automatically monitor whether the weak current loads normally operate, if a feedback signal is forcibly added to each weak current load, the cost of the air conditioner will be higher, and the main control chip needs to process the feedback signal of each weak current load, which results in occupying too many computing resources of the main control chip, and is not favorable for smooth operation of the air conditioner.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, a first object of the present invention is to provide a self-checking control method for a home appliance, which can determine whether a weak current load is operating normally after being started.
A second object of the invention is to propose a computer-readable storage medium.
A third object of the present invention is to provide a home appliance.
The fourth purpose of the present invention is to provide a self-checking control system for a home appliance.
In order to achieve the above object, a first embodiment of the present invention provides a self-test control method for a home appliance, where the home appliance includes at least one weak electrical load and a low-voltage power supply for supplying power to each weak electrical load, and the method includes: controlling the at least one weak current load to start to work, and detecting current change information when the low-voltage power supply supplies power; and judging whether the at least one weak current load normally operates or not according to the current change information.
According to the self-checking control method of the household appliance equipment, whether the weak current loads normally operate after being started can be judged through the current change information, the current change information is low in obtaining cost and high in reliability, so that a feedback signal does not need to be added to each weak current load forcibly, the development and manufacturing cost of the household appliance equipment is reduced, meanwhile, the current change information is convenient to compare and judge, occupation of the household appliance equipment on the operation resources of the main control chip in the self-checking process is reduced, and smooth operation of the household appliance equipment is guaranteed.
According to some embodiments of the invention, when the at least one weak electric load is multiple, controlling the at least one weak electric load to start to work comprises: and controlling each load in the weak current loads to start one by one.
Further, judging whether the at least one weak current load normally operates according to the current change information includes: and obtaining reference current change information when each weak current load works, and comparing the current change information when each weak current load works with the corresponding reference current change information to judge whether each weak current load normally operates.
According to some embodiments of the present invention, when the at least one weak electrical load is M, the M weak electrical loads are classified into N types, where M is an integer greater than 1 and N is less than or equal to M, and controlling the at least one weak electrical load to start to work includes: and controlling each type of weak current load to start one by one.
Further, judging whether the at least one weak current load normally operates according to the current change information includes: acquiring reference current change information of each type of weak current load during working, and comparing the current change information of each type of weak current load during working with corresponding reference current change information to judge whether each type of weak current load normally operates; when any type of weak current load is abnormal in operation, each load in the type of weak current load is controlled to be started in sequence, and current change information of each load in the type of weak current load during working is compared with corresponding reference current change information so as to judge whether each load in the type of weak current load is normal in operation.
According to some embodiments of the invention, when the at least one weak electric load is multiple, controlling the at least one weak electric load to start to work comprises: and controlling the plurality of weak current loads to start sequentially.
Further, judging whether the at least one weak current load normally operates according to the current change information includes: and obtaining reference current change information after each weak current load works sequentially, and comparing the current change information after each weak current load works sequentially with the corresponding reference current change information to judge whether each weak current load operates normally.
According to some embodiments of the invention, when the weak current load is determined to have abnormal operation, fault information is further generated and sent to the upper computer.
In order to achieve the above object, a second aspect of the present invention provides a computer-readable storage medium, on which a self-test control program of a home appliance is stored, where the self-test control program of the home appliance, when executed by a processor, implements the self-test control method of the home appliance.
According to the computer-readable storage medium of the embodiment of the invention, through the self-checking control method of the household appliance, whether the weak current loads normally operate after being started can be judged through the current change information, the current change information is low in acquisition cost and high in reliability, so that a feedback signal does not need to be added to each weak current load forcibly, the development and manufacturing cost of the household appliance is reduced, meanwhile, the current change information is convenient to compare and judge, the occupation of the operation resources of a main control chip in the self-checking process of the household appliance is reduced, and the smooth operation of the household appliance is ensured.
In order to achieve the above object, a third embodiment of the present invention provides a home appliance device, which includes a memory, a processor, and a home appliance device self-checking control program stored in the memory and executable on the processor, where when the processor executes the home appliance device self-checking control program, the home appliance device self-checking control method is implemented.
According to the household appliance provided by the embodiment of the invention, through the self-checking control method of the household appliance, whether the weak current load normally operates after being started can be judged through the current change information, the current change information is low in acquisition cost and high in reliability, so that a feedback signal does not need to be added to each weak current load forcibly, the development and manufacturing cost of the household appliance is reduced, meanwhile, the current change information is convenient to compare and judge, the occupation of the operation resources of a main control chip in the self-checking process of the household appliance is reduced, and the smooth operation of the household appliance is ensured.
In order to achieve the above object, a fourth aspect of the present invention provides a self-checking control system for a home appliance device, including: at least one light current load; a low voltage power supply for powering each of the light current loads; the current detection unit is used for detecting current change information when the low-voltage power supply supplies power; and the control unit is used for controlling the at least one weak current load to start to work and judging whether the at least one weak current load normally runs or not according to the current change information detected by the current detection unit.
According to the self-checking control system of the household appliance equipment, whether the weak current loads normally operate after being started can be judged through the current change information, the current change information is low in obtaining cost and high in reliability, so that a feedback signal does not need to be added to each weak current load forcibly, the development and manufacturing cost of the household appliance equipment is reduced, meanwhile, the current change information is convenient to compare and judge, occupation of the household appliance equipment on the operation resources of a main control chip in the self-checking process is reduced, and smooth operation of the household appliance equipment is guaranteed.
According to some embodiments of the invention, the current detection unit comprises: a current sensing resistor connected to the low voltage power supply; the voltage division circuit is connected to two ends of the current detection resistor and is used for dividing the voltage at the two ends of the current detection resistor respectively so as to output a first voltage division signal and a second voltage division signal; the voltage follower is connected with the voltage division circuit and used for respectively carrying out voltage following on the first voltage division signal and the second voltage division signal so as to output a first following voltage and a second following voltage; the subtraction operational amplifier is connected with the voltage follower and used for carrying out differential amplification on the first following voltage and the second following voltage so as to output the current change information.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a flowchart of a self-test control method of a home appliance according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a self-test control method for a home appliance according to a first embodiment of the present invention;
fig. 3 is a flowchart illustrating a self-test control method for a home device according to a second embodiment of the present invention;
fig. 4 is a flowchart illustrating a self-test control method for a home device according to a third embodiment of the present invention;
fig. 5 is a block diagram of a self-test control system of a home appliance according to an embodiment of the present invention;
fig. 6 is a circuit diagram of a current detection unit according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout.
A home appliance and a self-test control method, system and storage medium thereof according to embodiments of the present invention are described in detail below with reference to the accompanying drawings.
In some implementations of the present invention, the home appliance may be an air conditioner, the weak electrical load may be a load such as an electronic expansion valve, a stepping motor, a swing motor, a dc pump, and a UV lamp, and the low voltage power supply may be a 12V power supply.
Fig. 1 is a flowchart of a self-test control method of a home appliance according to an embodiment of the present invention. The method comprises the following steps:
and step S1, controlling at least one weak current load to start to work, and detecting current change information when the low-voltage power supply supplies power.
The low-voltage power supply can supply power to at least one weak-current load so as to start and work the corresponding weak-current load. The current variation information may include a corresponding value of the low-voltage power supply time and the low-voltage power supply current.
In some embodiments of the invention, the current variation information is current waveform data of the low voltage power supply.
And step S2, judging whether the at least one weak current load normally operates according to the current change information.
It can be understood that the current change information when the weak electric load operates normally is different from the current change information when the weak electric load operates abnormally, so that whether the weak electric load operates normally can be judged through the current change information.
In some embodiments of the present invention, the main control chip of the home appliance device may be an MCU (micro controller Unit), the MCU controls the start and operation conditions of the weak electrical load, and meanwhile, the MCU determines whether the weak electrical load normally operates during operation according to the current variation information, so as to control the closed loop, thereby improving the safety and intelligence of the home appliance device.
The self-checking control method provided by the embodiment of the invention can be used for power-on self-checking and power-off self-checking of the household appliance, real-time monitoring of the household appliance during operation, and electric control production process of the household appliance, so as to reduce manual detection, improve efficiency and realize monitoring of a client.
According to the self-checking control method provided by the embodiment of the invention, whether the weak current load normally operates after being started can be judged through the current change information, the current change information is low in acquisition cost and high in reliability, so that a feedback signal does not need to be added to each weak current load forcibly, the development and manufacturing cost of the household appliance is reduced, and meanwhile, the current change information is convenient to compare and judge, so that the occupation of the calculation resources of the main control chip of the household appliance in the self-checking process is favorably reduced, and the smooth operation of the household appliance is ensured.
In some embodiments of the present invention, when there is a plurality of at least one weak electric load, controlling the at least one weak electric load to start to operate may include: and controlling each load in the weak current loads to be started one by one so as to obtain the current change information corresponding to each weak current load.
It should be noted that, the one-by-one starting of each load may be that the last low-voltage load is closed and then the next low-voltage load is started, in some embodiments of the present invention, the plurality of weak-current loads include an electronic expansion valve and a swing motor, the electronic expansion valve is controlled to start to work, the electronic expansion valve is closed after the detection of the information of the current change when the low-voltage power supplies power to the electronic expansion valve, and then the swing motor is started again, and the information of the current change when the low-voltage power supplies power to the swing motor is detected and obtained.
Further, judging whether at least one weak current load normally operates according to the current change information, including: and obtaining reference current change information when each weak current load works, and comparing the current change information when each weak current load works with the corresponding reference current change information to judge whether each weak current load normally operates, namely judging that the weak current load normally operates if the current change information of the low-voltage power supply is consistent with the corresponding reference current change information when the weak current load works, otherwise, judging that the weak current load abnormally operates. The reference current change information corresponding to each weak electrical load during operation may be current change information of the weak electrical load supplied by the low-voltage power supply when the weak electrical load is in normal operation.
In some embodiments of the present invention, the current change information may be current waveform data, and the waveform data of the low-voltage power supply current when the weak electrical load works may be compared with corresponding reference current waveform data, and if the two waveform data are consistent or smaller than a preset difference value, it is determined that the weak electrical load normally operates, otherwise, it is determined that the weak electrical load abnormally operates. The preset difference value can be determined according to the running conditions of the household appliance and the weak current load, and system deviations such as component precision and load aging conditions, so that misjudgment is reduced.
It should be noted that the reference current variation information may be stored in a memory of the household appliance in advance, and a parameter library or a database is formed, and when the current variation information needs to be compared, the MCU may obtain the corresponding reference current variation information from the memory. In some embodiments of the invention, the reference current change information in the parameter base or the database can be updated automatically to reduce the influence of system deviation such as component precision, load aging condition and the like on the current change information, so as to be beneficial to reducing misjudgment.
In other embodiments of the present invention, when the at least one weak electrical load is M, the M weak electrical loads are classified into N types, where M is an integer greater than 1 and N is less than or equal to M, and controlling the at least one weak electrical load to start to operate may include: and controlling each type of weak current load to be started one by one so as to obtain the current change information corresponding to each type of weak current load.
In some preferred embodiments, the weak electric loads are classified according to operation modes of the home appliance so that the operation of each of the weak electric loads does not conflict when the same class of weak electric loads are operated. When the household appliance is an air conditioner, the weak electric loads used for operating the air conditioner in the heating mode are classified into the same type, and the weak electric loads used for operating the air conditioner in the cooling mode are classified into the same type.
Further, judging whether at least one weak current load normally operates according to the current change information, including: the method comprises the steps of obtaining reference current change information of each type of weak current load during working, and comparing the current change information of each type of weak current load during working with corresponding reference current change information to judge whether each type of weak current load normally operates, wherein the corresponding reference current change information of each type of weak current load during working can be the current change information of the low-voltage power supply for the type of weak current load during normal operation of the type of weak current load.
When any type of weak electric load is abnormal in operation, each load in the type of weak electric load is controlled to be started in sequence, and current change information of each load in the type of weak electric load during working is compared with corresponding reference current change information to judge whether each load in the type of weak electric load is normal in operation or not, wherein the sequential starting can be that each load is started one by one or that each load is started in sequence.
That is to say, each type of weak current load can be controlled to be started one by one, then whether each type of weak current load is normally operated or not is quickly confirmed through the current change information of each type of weak current load, so that the self-checking time can be reduced, if one type of weak current load is normally operated, each weak current load in the normally operated type of weak current load is normally operated, if one type of weak current load is abnormally operated, at least one abnormally operated weak current load exists in the abnormally operated type of weak current load, and each load in the abnormally operated type of weak current load can be sequentially started, so that the abnormally operated weak current load can be found through the current change information of each weak current load in the working process, the self-checking speed of the household appliance can be increased, and the abnormally operated weak current load can be quickly found.
In some other embodiments of the present invention, when there is a plurality of at least one weak electric load, controlling the at least one weak electric load to start to operate may include: and controlling the plurality of weak electric loads to start in sequence so as to acquire the current change information corresponding to each weak electric load in the starting sequence.
It should be noted that, the sequential starting of the plurality of weak current loads may be that after the previous low voltage load is started, the previous low voltage load is kept in a normal working state, and then the next low voltage load is started, for example, the plurality of weak current loads include an electronic expansion valve and a swing motor, the electronic expansion valve is controlled to start to work, after the change information of the current when the low voltage power supply supplies power to the electronic expansion valve is detected, the electronic expansion valve is kept in a normal working state, then the swing motor is started, and the change information of the current when the low voltage power supply supplies power to the electronic expansion valve and the swing motor is detected and obtained.
Preferably, when the weak current loads are started sequentially, the starting sequence of each weak current load is the same as the starting sequence of each weak current load when the household appliance is started, so that the startup self-checking and the real-time monitoring during operation of the household appliance are realized under the condition that the household appliance is ensured to be normally started to work. When the household appliance is an air conditioner, if the electronic expansion valve is started before the wind swinging motor when the air conditioner is started, the electronic expansion valve is started before the wind swinging motor when the weak electric loads are started in sequence.
Further, judging whether the at least one light current load normally operates according to the current change information may include: obtaining reference current change information after each weak current load works sequentially, and comparing the current change information after each weak current load works sequentially with corresponding reference current change information to judge whether each weak current load operates normally, wherein the corresponding reference current change information after each weak current load works sequentially can be: and when the current load which is already working normally operates at the same time, the low-voltage power supplies supply current change information. Therefore, when the weak electric loads are controlled to start according to the preset sequence, if the current change information is inconsistent with the corresponding reference current change information after any weak electric load is started, the weak electric load is judged to have abnormal operation, and the sequential starting of the weak electric loads and the operation of the household appliance can be stopped at the same time, so that the safety of the household appliance is ensured.
In some embodiments of the present invention, when it is determined that the weak electrical load has an abnormal operation, fault information may be generated, and the generated fault information is sent to an upper computer, where the upper computer may be a server, the home appliance may communicate with the server through a network module, and the server may send the fault information to a mobile terminal of a user, so that the user can know the fault information of the home appliance conveniently. In addition, the server can send the fault information to an after-sales department of the household appliance after the user is authorized, so that the after-sales department can remotely assist the user in solving the fault of the household appliance, or provide corresponding maintenance service for the user according to the fault information, and therefore the after-sales service speed can be accelerated, the maintenance efficiency can be improved, and the user experience can be improved.
Fig. 2 is a flowchart of a self-test control method for a home appliance according to a first embodiment of the present invention, where the method includes:
step S101, power-on self-test 1.
In step S102, the load 1 is operated.
And step S103, judging whether the current change information is consistent with the parameter library, if so, executing step S105, and if not, executing step S104.
In step S104, the abnormal data 1 is recorded, and then step S105 is executed.
In step S105, the load 2 is operated.
And step S106, judging whether the current change information is consistent with the parameter library, if so, executing step S108, and if not, executing step S107.
In step S107, the abnormal data 2 is recorded, and then step S108 is executed.
And step S108, operating the rest loads one by one.
After each load is operated one by one, whether the current change information is consistent with the parameter library or not is judged, and if not, corresponding abnormal data are recorded.
In step S109, self-test is completed (failure information is output).
The current change information is the change information of the current when the power supply supplies power to the load after the load is started. The parameter library comprises the change information of the corresponding reference current when each load works, namely the current change information of the power supply for supplying power to the load when the load normally runs.
According to the self-checking control method provided by the embodiment of the invention, whether the weak current loads normally operate after being started is judged by operating all the loads in the household appliance one by one and current change information, the current change information is low in acquisition cost and high in reliability, so that a feedback signal does not need to be added to each weak current load forcibly, the development and manufacturing cost of the household appliance is reduced, meanwhile, the current change information is convenient to compare and judge, the occupation of the main control chip operation resources in the self-checking process of the household appliance is reduced, and the smooth operation of the household appliance is ensured.
Fig. 3 is a flowchart of a self-test control method for a home appliance according to a second embodiment of the present invention, where the method includes:
step S201, power on self test 2.
Step S202, the load 1 major class is operated.
Step S203, judging whether the current change information is consistent with the parameter library, if so, executing step S213, and if not, executing step S204.
In step S204, load a in the load 1 class is run.
Step S205, judging whether the current change information is consistent with the parameter library, if so, executing step S207, and if not, executing step S206.
In step S206, the abnormal data a is recorded, and then step S207 is executed.
In step S207, the load B in the load 1 class is operated.
And step S208, judging whether the current change information is consistent with the parameter library, if so, executing step S210, and if not, executing step S209.
In step S209, the abnormal data B is recorded, and then step S210 is executed.
Step S210, load C in the load 1 class is run.
Step S211, determining whether the current variation information is consistent with the parameter library, if yes, executing step S213, and if no, executing step S212.
In step S212, the abnormal data C is recorded, and then step S213 is performed.
And if the load 1 also comprises other loads, the other loads can be continuously operated in sequence, and the current change information is compared with the parameter library to judge whether the other loads normally operate.
Step S213 runs the load 2 major class.
In step S214, it is determined whether the current variation information matches the parameter library, and if yes, step S216 is executed, and if no, step S215 is executed.
In step S215, the abnormal data 2 is recorded.
Step S215 also includes controlling each load in the load 2 category to start in turn, and determining whether the operation of each load is normal according to the current variation information, in a similar manner as in steps S204-S212.
And step S216, operating the rest load classes one by one.
Step S216 further includes, by using a similar method as in steps S203-S212, determining whether the current change information of the class of the operating loads is consistent with the parameter library, if not, controlling the loads in the class to start sequentially, determining whether each load operates normally according to the current change information, finding out an abnormal load, and recording corresponding abnormal data.
In step S217, the self-test is ended (failure information is output).
According to the self-checking control method provided by the embodiment of the invention, each type of load can be controlled to be started one by one, whether each type of load normally operates or not is rapidly confirmed through the current change information of each type of load, if one type of load normally operates, each load in the type of load normally operates, if one type of load abnormally operates, at least one load in the type of load abnormally operates abnormally, each load in the type of load abnormally operates is sequentially started, the load abnormally operates is found through the current change information generated when each load operates, the self-checking speed of household appliance equipment is increased, and the load abnormally operates is rapidly found.
Fig. 4 is a flowchart of a self-test control method for a home appliance according to a third embodiment of the present invention, where the method includes:
step S301, starting up operation.
And step S302, controlling the load 1 to operate.
Step S303, recording the current variation information of the operating load 1.
Step S304, judging whether the current change information is consistent with the parameter library, if so, executing step S306, and if not, executing step S305.
In step S305, the abnormal data 1 is recorded, and then step S315 is performed.
And step S306, controlling the load 2 to operate.
In step S307, the current variation information of the operating load 1 and the load 2 is recorded.
Step S308, judging whether the current change information is consistent with the parameter library, if so, executing step S310, and if not, executing step S309.
In step S309, the abnormal data 2 is recorded, and then step S315 is executed.
In step S310, the load 3 is controlled to operate.
In step S311, the current variation information of the operating load 1+ load 2+ load 3 is recorded.
Step S312, determining whether the current variation information is consistent with the parameter library, if yes, executing step S314, and if no, executing step S313.
In step S313, the abnormal data 3 is recorded, and then step S315 is executed.
And step S314, sequentially controlling the other loads to be sequentially started.
Step S314 also includes determining whether the current variation information is consistent with the parameter library after each load is started, and if not, recording abnormal data, and executing step S315, in a similar manner as in steps S302-S313.
In step S315, the self-test is ended (failure information is output).
According to the self-checking control method provided by the embodiment of the invention, when the weak electric loads are started sequentially, the starting sequence of each weak electric load is the same as the starting sequence of each weak electric load when the household appliance is started, so that the power-on self-checking of the household appliance is realized under the condition that the household appliance is normally started to work.
In a second aspect of the present invention, a computer-readable storage medium is provided, where a self-checking control program of a home appliance is stored on the computer-readable storage medium, and when the self-checking control program of the home appliance is executed by a processor, the self-checking control method of the home appliance in the foregoing embodiment is implemented.
According to the computer-readable storage medium of the embodiment of the invention, through the self-checking control method of the embodiment, whether the weak current loads normally operate after being started can be judged through the current change information, the current change information is low in acquisition cost and high in reliability, so that a feedback signal does not need to be added to each weak current load forcibly, the development and manufacturing cost of the household appliance is reduced, meanwhile, the current change information is convenient to compare and judge, the occupation of the operation resources of the main control chip in the self-checking process of the household appliance is reduced, and the smooth operation of the household appliance is ensured.
The embodiment of the third aspect of the present invention provides a home appliance device, which includes a memory, a processor, and a home appliance device self-checking control program stored in the memory and operable on the processor, and when the processor executes the home appliance device self-checking control program, the home appliance device self-checking control method of the above embodiments is implemented.
According to the household appliance provided by the embodiment of the invention, through the self-checking control method of the embodiment, whether the weak current loads normally operate after being started can be judged through the current change information, the current change information is low in acquisition cost and high in reliability, so that a feedback signal does not need to be added to each weak current load forcibly, the development and manufacturing cost of the household appliance is reduced, meanwhile, the current change information is convenient to compare and judge, the occupation of the operation resources of a main control chip in the self-checking process of the household appliance is reduced, and the smooth operation of the household appliance is ensured.
An embodiment of a fourth aspect of the present invention provides a self-checking control system for a home appliance device, including: the low-voltage power supply, the current detection unit, the control unit and at least one weak current load.
The low-voltage power supply is used for supplying power to each weak-current load, the current detection unit is used for detecting current change information when the low-voltage power supply supplies power, and the control unit is used for controlling at least one weak-current load to start to work and judging whether the at least one weak-current load normally runs or not according to the current change information detected by the current detection unit.
Referring to fig. 5, in an embodiment of the present invention, the low voltage power supply is a 12V power supply, the current detection unit is a current detection circuit, the control unit includes an MCU and a load operation database, and the weak current load includes: electronic expansion valves, swing motors, direct current pumps and other loads. MCU controls the output of light current load through control signal, and simultaneously, MCU compares with the database according to current change information, judges whether light current load normally operates at the during operation to realize the control closed loop, thereby be favorable to promoting household electrical appliances's security and intellectuality.
It should be noted that a specific implementation manner of the self-checking control system of the home appliance device in the embodiment of the present invention is similar to a specific implementation manner of the self-checking control method of the home appliance device in the embodiment of the present invention, and please refer to the description of the method part specifically, and details are not repeated here in order to reduce redundancy.
According to the self-checking control system provided by the embodiment of the invention, whether the weak current loads normally operate after being started can be judged through the current change information, the current change information is low in acquisition cost and high in reliability, so that a feedback signal does not need to be added to each weak current load forcibly, the development and manufacturing cost of the household appliance is reduced, and meanwhile, the current change information is convenient to compare and judge, so that the occupation of the calculation resources of the main control chip of the household appliance in the self-checking process is favorably reduced, and the smooth operation of the household appliance is ensured.
In some embodiments of the present invention, the current detection unit includes: current detection resistor, voltage division circuit, voltage follower and subtraction operational amplifier.
The current detection resistor can be a low-resistance non-inductive resistor to reduce the influence of the current detection resistor on the power supply of the low-voltage power supply, the current detection resistor is connected to the low-voltage power supply, two ends of the current detection resistor generate a voltage proportional to the current passing through the current detection resistor, the voltage division circuit is connected to two ends of the current detection resistor and is used for dividing the voltage of the two ends of the current detection resistor respectively to output a first voltage division signal and a second voltage division signal, the voltage follower is connected with the voltage division circuit and is used for carrying out voltage following on the first voltage division signal and the second voltage division signal respectively to output a first following voltage and a second following voltage, the subtraction operational amplifier is connected with the voltage follower and is used for carrying out differential amplification on the first following voltage and the second following voltage to output current change information.
Referring to fig. 6, in an embodiment of the invention, a current detection resistor Rass is connected to a switching power supply circuit, the switching power supply circuit outputs +12V voltage to supply power to a load, the current detection resistor has voltage variation, voltage reduction is performed through voltage division resistors (with high precision and large resistance) R11, R12, R13 and R14 in the voltage division circuit, and output current variation information is transmitted to a control unit through a voltage follower connected to a subtraction operational amplifier, so that current variation information during power supply of a low-voltage power supply can be obtained according to the amplified voltage and the resistance of the current detection resistor.
In some other embodiments of the present invention, the current detection unit may be a current sensor.
It should be noted that the processor may be an integrated circuit chip having signal processing capability. The processor may be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed.
Also, the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (12)
1. A self-checking control method of household electrical appliance is characterized in that the household electrical appliance comprises at least one weak current load and a low-voltage power supply for supplying power to each weak current load, and the method comprises the following steps:
controlling the at least one weak current load to start to work, and detecting current change information when the low-voltage power supply supplies power;
and judging whether the at least one weak current load normally operates or not according to the current change information.
2. The method according to claim 1, wherein when the at least one weak electric load is plural, controlling the at least one weak electric load to start to work comprises:
and controlling each load in the weak current loads to start one by one.
3. The method of claim 2, wherein determining whether the at least one light current load is operating normally according to the current variation information comprises:
and obtaining reference current change information when each weak current load works, and comparing the current change information when each weak current load works with the corresponding reference current change information to judge whether each weak current load normally operates.
4. The method according to claim 1, wherein when the at least one weak electrical load is M, the M weak electrical loads are classified into N types, M is an integer greater than 1, and N is less than or equal to M, and wherein controlling the at least one weak electrical load to start working comprises:
and controlling each type of weak current load to start one by one.
5. The method of claim 4, wherein determining whether the at least one light current load is operating normally according to the current variation information comprises:
acquiring reference current change information of each type of weak current load during working, and comparing the current change information of each type of weak current load during working with corresponding reference current change information to judge whether each type of weak current load normally operates;
when any type of weak current load is abnormal in operation, each load in the type of weak current load is controlled to be started in sequence, and current change information of each load in the type of weak current load during working is compared with corresponding reference current change information so as to judge whether each load in the type of weak current load is normal in operation.
6. The method according to claim 1, wherein when the at least one weak electric load is plural, controlling the at least one weak electric load to start to work comprises:
and controlling the plurality of weak current loads to start sequentially.
7. The method of claim 6, wherein determining whether the at least one light current load is operating normally according to the current variation information comprises:
and obtaining reference current change information after each weak current load works sequentially, and comparing the current change information after each weak current load works sequentially with the corresponding reference current change information to judge whether each weak current load operates normally.
8. The method according to any one of claims 1-7, characterized in that when the weak electric load is determined to have abnormal operation, fault information is also generated and sent to an upper computer.
9. A computer-readable storage medium, on which a self-test control program of a home appliance is stored, the self-test control program of the home appliance, when executed by a processor, implementing the self-test control method of the home appliance according to any one of claims 1 to 8.
10. A household appliance is characterized by comprising a memory, a processor and a household appliance self-checking control program which is stored on the memory and can run on the processor, wherein when the processor executes the household appliance self-checking control program, the household appliance self-checking control method according to any one of claims 1 to 8 is realized.
11. A self-checking control system of household electrical appliance, comprising:
at least one light current load;
a low voltage power supply for powering each of the light current loads;
the current detection unit is used for detecting current change information when the low-voltage power supply supplies power;
and the control unit is used for controlling the at least one weak current load to start to work and judging whether the at least one weak current load normally runs or not according to the current change information detected by the current detection unit.
12. The self-test control system according to claim 11, wherein the current detection unit includes:
a current sensing resistor connected to the low voltage power supply;
the voltage division circuit is connected to two ends of the current detection resistor and is used for dividing the voltage at the two ends of the current detection resistor respectively so as to output a first voltage division signal and a second voltage division signal;
the voltage follower is connected with the voltage division circuit and used for respectively carrying out voltage following on the first voltage division signal and the second voltage division signal so as to output a first following voltage and a second following voltage;
the subtraction operational amplifier is connected with the voltage follower and used for carrying out differential amplification on the first following voltage and the second following voltage so as to output the current change information.
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