Household appliance and control method thereof

Abstract

The invention discloses a household appliance and a control method thereof, the household appliance comprises a device body, a sampling module, a memory and a controller, the controller is connected with the sampling module and the memory, and the controller is configured to respond to a power-on instruction of the device body in a first control mode, according to the historical working parameters, it is determined that the first power failure is an overload fault, and the first power failure is power failure before current power-on; and determining a current target control parameter according to the historical working parameter of the first power failure, the current target control parameter being smaller than the historical working parameter of the first power failure. According to the equipment, when the equipment is powered on next time after power failure, control parameters of equipment operation can be automatically adjusted, the situation of power grid abnormity or power failure caused by overload faults is reduced, impact on a power grid during equipment operation is reduced, and therefore the safety of equipment operation and the reliability of the power grid are improved.

Description

Technical Field

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

[0002] In areas with poor power grid conditions such as Central Asia, the Middle East, and Africa, many households and commercial users rely on self-generated power grids or weak power grids. Due to the instability of power supply and the aging of power grid infrastructure, the power grid load in these areas is relatively fragile. Especially when using household appliances, such as air conditioners, refrigerators and other equipment, if the equipment is running under too much load, it may cause grid voltage fluctuations, current or power exceeding the grid's carrying capacity, and thus cause grid abnormalities or even tripping. To avoid this situation, users usually need to manually set the power saving level of the device after starting up to limit the device's operating load and avoid overload failures.

[0003] However, this method has obvious limitations, that is, if the user forgets to set the power saving level after starting up, the equipment will often cause abnormalities in the power grid or even trip when running under heavy load. Therefore, this manual control method has a high risk. If the user often forgets to set it, it will easily cause equipment failure and power grid failure, thereby reducing the safety of equipment operation and the reliability of the power grid. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a household appliance that can automatically adjust the control parameters of the device operation when it is powered on next time after a power outage, thereby reducing power grid anomalies or power outages caused by overload faults, reducing the impact of the device on the power grid during operation, and thus improving the safety of the device operation and the reliability of the power grid.

[0005] The second objective of the present invention is to provide a control method for household electrical appliances.

[0006] In order to achieve the above-mentioned purpose, the household appliance of the first aspect of the embodiment of the present invention includes: a device body; a sampling module, which is arranged on the device body and is used to collect the working parameters of the device body; a memory, which is arranged on the device body and is used to store at least the historical working parameters of the device body for a preset time before the current power outage; a controller, which is connected to the sampling module and the memory, and is configured to: in a first control mode, respond to the power-on instruction of the device body, determine that the current power outage of the device body is an overload fault according to the historical working parameters; determine the current target control parameters according to the historical working parameters for the preset time before the current power outage, wherein the current target control parameters are less than the historical working parameters for the preset time before the current power outage.

[0007] According to the household appliance of the embodiment of the present invention, the sampling module collects the working parameters of the device body and stores them in the memory to record the historical working parameters of the first power outage. After the device is powered on again, the controller controls the device to enter the first control mode, reads the historical working parameters of the first power outage, and determines whether the first power outage of the device body is caused by an overload fault. If it is determined that the first power outage of the device body is an overload fault, the controller automatically adjusts the target control parameters of the device after it is powered on again to be lower than the historical working parameters of the first power outage, so that the load of the device during operation is limited to the tolerable range of the power grid. Therefore, by configuring the controller in this way, even if the user does not manually set the power saving level, the household appliance can automatically adjust the control parameters of the device operation after powering on, reducing the abnormality or power outage of the power grid caused by the overload fault, and reducing the impact of the device on the power grid during operation, thereby effectively improving the safety of the device operation and enhancing the reliability of the power grid.

[0008] In some embodiments, the first control mode satisfies the following conditions: no power saving level setting instruction is received, no power saving setting parameters in the same period as the current time exist, and no self-learning history parameters in the same period as the current time exist.

[0009] In some embodiments, the current target control parameter includes a current target control current value, and the current target control current value is smaller than the shutdown current value at the first power failure.

[0010] In some embodiments, the historical operating parameters include the AC input current and AC input power of the device body; the controller is also configured to determine that the power failure of the device body is the overload fault when the AC input current exceeds the shutdown protection current threshold and / or the AC input power exceeds the shutdown protection power threshold.

[0011] In some embodiments, the controller is further configured to: after controlling the operation of the device body according to the current target control parameters, if the device body overloads again and loses power for a second time, and the average power within a preset time period before the second power outage is greater than the average power within the preset time period before the first power outage, then when power is restored again, the household appliance is controlled with a power lower than the average power within the preset time period before the second power outage.

[0012] In some embodiments, the controller is further configured to: after controlling the operation of the device body according to the current target control parameters, if the device body overloads again and loses power for a second time, and the average power within a preset time period before the second power outage is less than or equal to the average power within a preset time period before the first power outage, then when power is restored again, the household appliance is controlled with a current value lower than the shutdown current during the second power outage.

[0013] In some embodiments, the household appliance also includes a receiving module, which is connected to the controller and is used to receive a power saving level setting instruction; the controller is also configured to: in a second control mode, control the device body according to the control parameters included in the received power saving level setting instruction; wherein, the second control mode satisfies the following conditions: the power saving level setting instruction is received.

[0014] In some embodiments, the memory is also used to store power saving setting parameters set by the user; the controller is also configured to: in a third control mode, control the device body according to the power saving setting parameters of the same period as the current time; wherein the third control mode satisfies the following conditions: the power saving level setting instruction is not received and there are power saving setting parameters of the same period as the current time.

[0015] In some embodiments, the memory is also used to store self-learning history parameters; the controller is also configured to: in a fourth control mode, control the device body according to the self-learning history parameters last stored at the same time as the current time; wherein the fourth control mode satisfies the following conditions: the power saving level setting instruction is not received and there are no power saving setting parameters at the same time as the current time.

[0016] In some embodiments, the controller is further configured to: in the third control mode or the fourth control mode, upon receiving the power saving level setting instruction when the device body is operating, control the operation of the device body according to control parameters included in the power saving level setting instruction.

[0017] In order to achieve the above-mentioned purpose, the control method of household appliances in the second aspect of the embodiment of the present invention includes: in a first control mode, in response to the power-on instruction of the device body, determining that the first power outage is an overload fault according to the historical working parameters of the first power outage, wherein the first power outage is the power outage before the current power-on; determining the current target control parameters according to the historical working parameters of the first power outage, wherein the current target control parameters are less than the historical working parameters of the first power outage; wherein the first control mode satisfies the following conditions: no power saving level setting instruction is received, there are no power saving setting parameters for the same period as the current time, and there are no self-learning historical parameters for the same period as the current time.

[0018] According to the control method of the household appliance of the embodiment of the present invention, in response to the power-on instruction of the device body, after the device is powered on again, the controller controls the device to enter the first control mode. Then, the historical working parameters of the first power outage are read and it is determined whether the first power outage of the device body is caused by an overload fault. If it is determined that the first power outage of the device body is an overload fault, the controller automatically adjusts the target control parameters of the device after it is powered on again, so that it is lower than the historical working parameters of the first power outage, so that the load of the device during operation is limited to the tolerable range of the power grid. Therefore, through such a control method, even if the user does not manually set the power saving level, and there are no power saving setting parameters of the same period as the current time and no self-learning historical parameters of the same period as the current time, the household appliance can automatically adjust the control parameters of the device operation after powering on, reducing the abnormality or power outage of the power grid caused by the overload fault, and reducing the impact of the device on the power grid during operation, thereby effectively improving the safety of the device operation and enhancing the reliability of the power grid.

[0019] 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

[0020] 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: Figure 1 is a block diagram of a household appliance according to an embodiment of the present invention; Figure 2 is a block diagram of an air conditioner in which the household appliance according to an embodiment of the present invention is used; Figure 3 is a block diagram of a household appliance of an embodiment of the present invention, which is a refrigerator; Figure 4 is a schematic diagram of an AC input voltage sampling circuit according to an embodiment of the present invention; Figure 5 is a schematic diagram of an AC input current sampling circuit according to an embodiment of the present invention; Figure 6 is a flow chart of a method for controlling a household appliance according to an embodiment of the present invention; Figure 7 is a flowchart of a control method for a household appliance in a first control mode according to an embodiment of the present invention; Figure 8 is a flowchart of a control method for a household appliance in a second control mode according to an embodiment of the present invention; Fig. 9is a flowchart of a control method for a household appliance in a third control mode according to an embodiment of the present invention; Fig.10 is a flowchart of a control method of a household appliance in a fourth control mode according to an embodiment of the present invention; Fig.11 is a flowchart of a control method for switching a household appliance to different control modes according to an embodiment of the present invention.

[0021] Reference numerals: Home appliances 100; Device body 1; sampling module 2; memory 3; controller 4; receiving module 5; Compressor 11; condenser 12; evaporator 13; throttle valve 14; fan 15; blower 16; refrigerating chamber heat exchange subsystem 17; freezing chamber heat exchange subsystem 18. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0023] Reference below Figure 1-Figure 5 A home appliance according to an embodiment of the present invention is described.

[0024] Figure 1 is a block diagram of a household appliance according to an embodiment of the present invention. Figure 1 As shown, the household appliance 100 includes: a device body 1, a sampling module 2, a memory 3 and a controller 4.

[0025] In some embodiments, the household appliance 100 may be a household or commercial appliance such as an air conditioner or a refrigerator. The device body 1 is the core structure of the household appliance 100, including the hardware components, mechanical structure and control system required for operation of the device. Its function is to realize the main functions of the household appliance 100, such as cooling, heating, and preservation.

[0026] Figure 2 FIG. 1 is a block diagram of an embodiment of the present invention in which the household appliance is an air conditioner. Figure 2 As shown, the device body 1 may include but is not limited to: a compressor 11 , a condenser 12 , an evaporator 13 , a throttle valve 14 , and a fan 15 .

[0027] Figure 3 FIG. 1 is a block diagram of a household appliance of an embodiment of the present invention, which is a refrigerator. Figure 3 As shown, the device body 1 may include but is not limited to: a compressor 11 , a fan 16 , a condenser 12 , a refrigerating chamber heat exchange subsystem 17 and a freezing chamber heat exchange subsystem 18 .

[0028] In some embodiments, the compressor 11 is one of the core components of the air conditioner and refrigerator, responsible for compressing the low-pressure, low-temperature refrigerant into a high-pressure, high-temperature gas to provide power for the refrigeration cycle. The compressor 11 can be a piston compressor, a scroll compressor, a centrifugal compressor, or a screw compressor. The specific type of the compressor 11 can be selected according to the specific requirements and application scenarios of the air conditioner and refrigerator, and is not specifically limited here.

[0029] In some embodiments, the condenser 12 may be a heat exchange device in an air conditioner or a refrigerator, and its main function is to cool the high-temperature and high-pressure gas discharged from the compressor 11 and condense it into liquid, thereby releasing heat. The condenser 12 may be a finned condenser, a plate condenser, or a shell and tube condenser of different types. The specific type of the condenser 12 may be selected according to the specific requirements and application scenarios of the air conditioner and the refrigerator, and is not specifically limited here.

[0030] In some embodiments, the evaporator 13 is another heat exchange device in the air conditioner, and its main function is to absorb heat from the surrounding environment during the process of the refrigerant absorbing heat and evaporating, thereby achieving a cooling effect. The evaporator 13 can be a fin evaporator, a plate evaporator, or a shell and tube evaporator. The specific type of the evaporator 13 can be selected according to the air conditioner and specific requirements and application scenarios, and is not specifically limited here.

[0031] In some embodiments, the throttle valve 14 may be a device for controlling the flow of the refrigerant, and the flow is adjusted by changing the cross-sectional area of ​​the fluid channel. The throttle valve 14 may be in various forms, including but not limited to an electric expansion valve, a thermal expansion valve, a manual expansion valve, etc. The specific type of the throttle valve 14 may be selected according to the specific requirements and application scenarios of the air conditioner, and is not specifically limited here.

[0032] In some embodiments, the fan 15 is used for air flow, helping to move indoor or outdoor air through the evaporator 13 and the condenser 12 to promote the heat exchange process. In the air conditioner, the fan 15 is mainly responsible for accelerating heat exchange, helping air flow, and improving cooling or heating efficiency.

[0033] In some embodiments, similar to the function of the fan 15, the main function of the fan 16 in the refrigerator is to promote the flow of cold air inside the refrigerator, ensuring that the cold air is evenly distributed to every corner of the refrigerator and the freezer, thereby improving the refrigeration efficiency. In the condenser 12, the fan 16 helps to improve the heat exchange efficiency. It discharges the hot air around the condenser 12, so that the condenser 12 can cool the refrigerant more effectively and convert it into a liquid state. In addition, the fan 16 can also help prevent the accumulation of frost to a certain extent, and reduce the accumulation of moisture by enhancing air flow, thereby slowing down the frosting phenomenon inside the refrigerator.

[0034] In some embodiments, the refrigerator heat exchange subsystem 17 may refer to a component for transferring cold to the interior of the refrigerator. The refrigerator heat exchange subsystem 17 may include a refrigerator evaporator, which is used to reduce the temperature of the refrigerator through the vaporization and heat absorption process of the refrigerant when the low-temperature and low-pressure refrigerant flows through the refrigerator evaporator. The refrigerator evaporator can evenly distribute the cold, ensure the temperature balance in the refrigerator, maintain the temperature between 2°C and 8°C, ensure that the temperature in the refrigerator is suitable for storing food that does not need to be frozen, and extend the shelf life of the food.

[0035] In some embodiments, the freezer heat exchange subsystem 18 may include a freezer evaporator, which is responsible for transferring cold to the inside of the freezer. The freezer evaporator absorbs heat in the freezer, ensuring that the temperature drops to -18°C or lower, ensuring that food is quickly frozen, thereby preventing food from spoiling and being suitable for long-term food storage.

[0036] In some embodiments, the sampling module 2 is disposed on the device body 1 and is used to collect the working parameters of the device body 1. The working parameters may include but are not limited to: AC input current, AC input voltage, input power, operating temperature, date, real-time clock, etc. The sampling module 2 may collect data once every preset time (such as 1 second) by using sensors, measuring chips or circuits to continuously and accurately record the operating status of the device.

[0037] For example, if Figure 4 and Figure 5 As shown, the sampling module 2 may include an AC input voltage sampling circuit and an AC input current sampling circuit. Among them, the AC input voltage sampling circuit can reduce the high voltage signal to a range suitable for processing by the operational amplifier through a resistor divider network, and use a filter capacitor to remove high-frequency noise to ensure signal quality. The operational amplifier amplifies or buffers the divided signal, sets the gain through the feedback network, and finally outputs a stable voltage signal for subsequent processing. The AC input current sampling circuit converts the current signal into a voltage signal proportional to it through a sampling resistor, and uses a protection diode to prevent damage to the circuit by large current. Subsequently, the filter network suppresses high-frequency noise on the signal, the operational amplifier amplifies the sampled voltage, and the feedback network further adjusts the signal gain, and outputs the filtered and amplified signal for subsequent processing.

[0038] In addition, the sampling module 2 may also include: a temperature sensor module, a power detection module, a clock module, etc. By adopting these circuits and modules, the working parameters of the device body 1 can be fully and accurately recorded, providing basic data support for the controller 4 to analyze the cause of power failure (such as overload failure) when the device is powered on and optimize the operating strategy after power-on.

[0039] In some embodiments, the memory 3 is provided in the device body 1, and is used to store the historical working parameters of the first power-off of the device body 1. The memory 3 may be a non-volatile memory (such as EEPROM or Flash) to ensure that the data is not lost after the power-off, and to provide a basis for judgment and adjustment during the subsequent power-on.

[0040] In some embodiments, the controller 4 may be a microcontroller unit (MCU), a digital signal processor (DSP), an embedded processor, a programmable logic controller (PLC), or other types of controllers 4 .

[0041] In some embodiments, the controller 4 is connected to the sampling module 2 and the memory 3, and the controller 4 is configured to: in the first control mode, in response to the power-on instruction of the device body 1, determine the first power failure as an overload fault according to the historical working parameters, wherein the first power failure is the power failure before the current power-on. Determine the current target control parameter according to the historical working parameters of the first power failure, wherein the current target control parameter is less than the historical working parameters of the first power failure. The specific type of the controller 4 can be selected according to the specific requirements of the household appliance 100, and is not specifically limited here.

[0042] According to the household appliance 100 of the embodiment of the present invention, the sampling module 2 collects the working parameters of the device body 1 and stores them in the memory 3 to record the historical working parameters of the first power outage. After the device is powered on again, the controller 4 controls the device to enter the first control mode, reads the historical working parameters of the first power outage, and determines whether the first power outage of the device body 1 is caused by an overload fault. If it is determined that the first power outage of the device body 1 is an overload fault, the controller 4 automatically adjusts the target control parameters of the device after it is powered on again to be lower than the historical working parameters of the first power outage, so that the load of the device during operation is limited to the tolerable range of the power grid. Therefore, by configuring the controller 4 in this way, even if the user does not manually set the power saving level, the household appliance 100 can automatically adjust the control parameters of the device operation after powering on, reducing the abnormality or power outage of the power grid caused by the overload fault, and reducing the impact of the device on the power grid during operation, thereby effectively improving the safety of the device operation and enhancing the reliability of the power grid.

[0043] In some embodiments, the first control mode satisfies the following conditions: no power saving level setting instruction is received, no power saving setting parameters exist in the same period as the current time, and no self-learning history parameters exist in the same period as the current time.

[0044] Among them, the power saving level setting instruction is issued by the user through the remote control, mobile phone application software or the touch screen on the device, and is used to adjust the power saving level of the home appliance 100. For example, the air conditioner or refrigerator can provide multiple power saving levels such as "low power mode 1", "low power mode 2", "low power mode 3" to meet different energy saving needs; the power saving setting parameters of the same period as the current time may refer to the power saving level that the user has previously actively set in the same week and the same time period. For example, the user may set "low power mode 2" for the air conditioner at 8 pm every Monday night, which belongs to the power saving setting parameters; the self-learning historical parameters of the same period as the current time may refer to the target control parameters that are automatically obtained according to the historical working parameters of the first power outage in the first control mode in the same week and the same time period.

[0045] Therefore, when no power saving level setting instruction is received from the user, and there are no power saving setting parameters for the same period as the current time, and there are no self-learning historical parameters for the same period as the current time, the household appliance 100 will enter the first control mode to adjust the target control parameters at the next power-on after the first power-off, so as to ensure that the device can operate safely and stably in the absence of external instructions or historical data support.

[0046] In some embodiments, the current target control parameter includes a current target control current value, and the current target control current value is smaller than the shutdown current value at the first power failure.

[0047] Among them, the current target control current value may refer to the current value that can ensure the normal operation of the device when it is powered on again after the first power outage. The shutdown current value may refer to the working current value recorded for a preset time (such as 20 seconds) before the first power outage. After the device is powered on again, the controller 4 automatically adjusts the target control current value to be less than the shutdown current value, which can reduce the power grid abnormality or power outage caused by overload faults, reduce the impact of the device on the power grid during operation, and thus improve the safety of equipment operation and the reliability of the power grid.

[0048] In some embodiments, the historical operating parameters include the AC input current and AC input power of the device body 1. The controller 4 is further configured to determine that the power failure of the device body 1 is an overload fault when the AC input current exceeds the shutdown protection current threshold and / or the AC input power exceeds the shutdown protection power threshold. The shutdown protection current threshold and the shutdown protection power threshold are preset limit values ​​when the device is running, and are used to determine whether an overload fault occurs.

[0049] In some embodiments, if there was a power outage at the same time as the current time, the shutdown protection current threshold is the shutdown current value of the preset time length (such as 20 seconds) before the last power outage at the same time as the current time, and the shutdown protection power threshold is the power value of the preset time length (such as 20 seconds) before the last power outage at the same time as the current time. When the AC input current collected by the acquisition module exceeds the shutdown protection current threshold, or the AC input power exceeds the shutdown protection power threshold, or the AC input current exceeds the shutdown protection current threshold and the AC input power exceeds the shutdown protection power threshold, a power outage will be caused, and it is determined that the power outage of the device body 1 is an overload fault.

[0050] If the home appliance 100 is experiencing a power outage for the first time, that is, there has been no power outage at the same time as the current time, the controller 4 will determine the fault type based on the current and power change trends for a preset time (such as 20 seconds) before the power outage. If the current and power change trends remain stable or decrease, the controller 4 determines that the power outage is a non-overload fault, which may be caused by other factors, such as voltage drop or low voltage fault. If the current has a significant increase trend before the power outage, the controller 4 determines that the power outage is an overload fault.

[0051] In some embodiments, the controller 4 is further configured as follows: after controlling the operation of the device body 1 according to the current target control parameters, if the device body 1 overloads again and loses power for a second time, and the average power within a preset time period before the second power outage is greater than the average power within a preset time period before the first power outage, then when power is turned on again, the household appliance 100 is controlled at a power lower than the average power within the preset time period before the second power outage.

[0052] Specifically, when the device body 1 has an overload fault and causes the first power outage, the current target control parameter is determined according to the historical working parameters of the first power outage to ensure that the current target control parameter is less than the historical working parameters of the first power outage. If the device body 1 is controlled to operate according to the current target control parameter, and the device body 1 has an overload fault again and causes the second power outage, the controller 4 needs to judge the relationship between the average power within the preset time length before the second power outage and the average power within the preset time length before the first power outage to determine whether to use the current regulation method or the power regulation method. If the average power within the preset time length before the second power outage is greater than the average power within the preset time length before the first power outage, this may be due to the instability of the grid voltage or other external factors, causing the power demand of the device at a certain moment to exceed the shutdown protection power threshold, thereby causing the overload power outage. In order to avoid overload faults caused by voltage fluctuations or other factors, the controller 4 uses the average power within the preset time length before the second power outage as the new shutdown protection power threshold, and when the device is powered on again, the controller 4 adjusts the power to be lower than the average power within the preset time length before the second power outage. This control strategy can effectively prevent overload failures from occurring again when the power grid is unstable or there are sudden voltage fluctuations, thereby improving the safety and stability of the equipment.

[0053] In some embodiments, the controller 4 is further configured as follows: after controlling the operation of the device body 1 according to the current target control parameters, if the device body 1 overloads again and the power is cut off for the second time, and the average power within a preset time period before the second power cut is less than the average power within a preset time period before the first power cut, then when power is turned on again, the household appliance 100 is controlled with a current value lower than the shutdown current during the second power cut.

[0054] Specifically, when the device body 1 has an overload fault and causes the first power outage, the current target control parameter is determined according to the historical working parameters of the first power outage to ensure that the current target control parameter is less than the historical working parameters of the first power outage. For example, if the shutdown current value of the first power outage is 10A, the controller 4 can set the current value in the current target control parameter to 9A.

[0055] Furthermore, if after the device body 1 is controlled to operate according to the target control parameters, the device body 1 has an overload fault again and causes a second power outage, the controller 4 needs to determine the relationship between the average power within the preset time length before the second power outage and the average power within the preset time length before the first power outage to determine whether to use the current regulation method or the power regulation method. If the average power within the preset time length before the second power outage is less than or equal to the average power within the preset time length before the first power outage, it means that the second power outage is still caused by overcurrent. Therefore, in order to avoid overload faults caused by overcurrent, the controller 4 uses the shutdown current value at the second power outage as the new shutdown protection current threshold, and when the device is powered on again, the controller 4 adjusts the current value to be lower than the shutdown current value at the second power outage, for example, 8A. Since the shutdown current value at the second power outage is less than the shutdown current value at the first power outage, the controller 4 reduces the probability of overload faults by gradually reducing the current, thereby protecting the safety of the equipment and the power grid.

[0056] In some embodiments, if the device is powered off for the second time due to an overload fault, and the time of the second power outage is different from the time of the first power outage due to the overload fault, the controller 4 can record the time of the second power outage as the time of the latest overload fault.

[0057] In some embodiments, Figure 1 As shown, the household appliance 100 further includes a receiving module 5, which is connected to the controller 4 and is used to receive a power saving level setting instruction. Specifically, the user issues an instruction through an interactive method such as a key, a touch screen, or voice input, and the receiving module 5 transmits the received power saving level setting instruction to the controller 4. The controller 4 switches to the second control mode according to the instruction to ensure that the operation of the device body 1 meets the power saving level requirement set by the user.

[0058] In some embodiments, the controller 4 is further configured to: in the second control mode, control the device body 1 according to the control parameters included in the received power saving level setting instruction. For example, current adjustment, compressor power adjustment, etc. The second control mode satisfies the following conditions: receiving the power saving level setting instruction. This means that the second control mode is only enabled when the user actively sets the power saving level. If the power saving level is not set, the device will switch to other control modes.

[0059] In some embodiments, the memory 3 is also used to store power saving setting parameters set by the user. Among them, these parameters reflect the user's power saving level setting habits in the same period. For example, the user is accustomed to setting the power saving level to "low power mode 2" from 12:00 to 1:00 every Wednesday. When the user does not actively set the power saving level from 12:00 to 1:00 on Wednesday of a certain week, the controller 4 can automatically switch to the third control mode according to the power saving setting parameters stored in the memory 3 to ensure that the device still operates in the control mode of "low power mode 2".

[0060] In some embodiments, the controller 4 is further configured to: in the third control mode, control the device body 1 according to the power saving setting parameters of the same period as the current time. The third control mode satisfies the following conditions: no power saving level setting instruction is received and there are power saving setting parameters of the same period as the current time. This means that the third control mode is only enabled when the user does not actively set the power saving level and there are power saving setting parameters of the same period as the current time. If the above two conditions cannot be met at the same time, the device will switch to other control modes.

[0061] In some embodiments, the memory 3 is also used to store self-learning historical parameters, wherein the self-learning historical parameters reflect the power outages caused by overload faults that occurred in the device in the same week and the same time period in the past, and adjust the current value and / or power value according to the power outage at that time, and store the adjusted values ​​in the memory 3 as reference values. Doing so can help the device adjust the subsequent operating state according to the historical parameters of the overload fault, thereby reducing the risk of power outages caused by overload.

[0062] In some embodiments, the controller 4 is further configured to: in the fourth control mode, control the device body 1 according to the self-learning historical parameters stored last time at the same time as the current time. The fourth control mode satisfies the following conditions: no power saving level setting instruction is received and there are no power saving setting parameters at the same time as the current time. This means that the fourth control mode is only enabled when the user does not actively set the power saving level and there are no power saving setting parameters at the same time as the current time. If the above two conditions cannot be met at the same time, the device will switch to other control modes.

[0063] In some embodiments, in the third control mode or the fourth control mode, when the device body 1 is working, a power saving level setting instruction is received, and the device body 1 is controlled to operate according to the control parameters included in the power saving level setting instruction. That is to say, no matter whether the household appliance 100 is currently in the third control mode (based on power saving setting parameter control) or the fourth control mode (based on self-learning historical parameter control), once the power saving level setting instruction actively issued by the user is received, the controller 4 will immediately switch to the second control mode and adjust the device according to the control parameters in the power saving level setting instruction. This means that the priority of the power saving level instruction (second control mode) actively set by the user is always higher than the third control mode and the fourth control mode. This ensures that the operation of the household appliance 100 can always respond and adjust in a timely manner according to the user's power saving needs, thereby meeting the user's control requirements to the greatest extent.

[0064] Reference below Figure 6 A control method for a home appliance according to an embodiment of the present invention is described.

[0065] Figure 6 is a flow chart of a method for controlling a household appliance according to an embodiment of the present invention. The method for controlling a household appliance at least includes steps S1-S2, which are as follows: S1, in the first control mode, in response to the power-on instruction of the device body, determining that the first power outage is an overload fault according to the historical working parameters of the first power outage, wherein the first power outage is the power outage before the current power-on.

[0066] In some embodiments, the power-on instruction may be an instruction for the device to start after receiving a power signal, which means that the device is ready to start running. The instruction may come from the user (such as pressing a switch) or a signal triggered when the system automatically starts.

[0067] In some embodiments, the historical operating parameters may include but are not limited to: AC input current, AC input voltage, input power, operating temperature, date, real-time clock, etc. The historical operating parameters are collected once every preset time (such as 1s) by the sampling module to continuously and accurately record the operating status of the device.

[0068] In some embodiments, the first power outage is determined to be an overload fault based on the historical working parameters of the first power outage. Specifically, after the first power outage, when the power is turned on again, the AC input voltage, AC input current, AC input power, etc. stored in the memory for a preset time (such as 1 minute) before the power outage can be checked. If it is found that before the power outage (such as 20 seconds before the power outage), the current or power remains stable or decreases, and there is no upward trend, then it is determined that the first power outage is a power outage due to other reasons other than overcurrent or overpower, such as voltage drop or low voltage fault. If the current has a clear trend of increasing 20s before the power outage, then it is determined that the first power outage is an overload fault caused by overcurrent.

[0069] S2, determining the current target control parameter according to the historical working parameter of the first power outage, wherein the current target control parameter is smaller than the historical working parameter of the first power outage.

[0070] In some embodiments, the current target control parameter includes the current target control current value, which is less than the shutdown current value at the first power outage. Among them, the current target control current value may refer to the current value that can ensure the normal operation of the device when it is powered on again after the first power outage. The shutdown current value may refer to the working current value recorded for a preset time (such as 20 seconds) before the first power outage. After the device is powered on again, the controller automatically adjusts the target control current value to be less than the shutdown current value, which can reduce the power grid abnormality or power outage caused by overload faults, reduce the impact of the equipment on the power grid during operation, and thus improve the safety of equipment operation and the reliability of the power grid.

[0071] In some embodiments, the first control mode satisfies the following conditions: no power saving level setting instruction is received, no power saving setting parameters exist in the same period as the current time, and no self-learning history parameters exist in the same period as the current time.

[0072] According to the household appliance control method of the embodiment of the present invention, in response to the power-on instruction of the device body, after the device is powered on again, the controller controls the device to enter the first control mode. Then, the historical working parameters of the first power outage are read and it is determined whether the first power outage of the device body is caused by an overload fault. If it is determined that the first power outage of the device body is an overload fault, the controller automatically adjusts the target control parameters of the device after it is powered on again, so that it is lower than the historical working parameters of the first power outage, so that the load of the device during operation is limited to the tolerable range of the power grid. Therefore, through such a control method, even if the user does not manually set the power saving level, and there are no power saving setting parameters of the same period as the current time and no self-learning historical parameters of the same period as the current time, the household appliance can automatically adjust the control parameters of the device operation after powering on, reducing the abnormality or power outage of the power grid caused by the overload fault, and reducing the impact of the device on the power grid during operation, thereby effectively improving the safety of the device operation and enhancing the reliability of the power grid.

[0073] Figure 7 1 is a flow chart of a control method for a household appliance in a first control mode according to an embodiment of the present invention. The control method for a household appliance in the first control mode includes at least steps S10-S21, which are as follows: S10, in response to a power-on instruction of the device body, entering a first control mode.

[0074] S11, determine whether the power failure before the current power-on is an overload fault, if so, go to step S12, if not, go to step S21.

[0075] S12, determine whether the power off before the current power on is the first power off, if so, go to step S14, if not, go to step S18.

[0076] S13, analyzing the AC input current, AC input voltage, and AC input power for a preset time period (eg, 20 seconds) before the first power outage.

[0077] S14, taking the AC input current of a preset time (such as 20 seconds) before the first power failure as the shutdown current value, and setting the current target control current value to be smaller than the shutdown current value during the first power failure.

[0078] S15, determining whether the AC input voltage fluctuations for a preset time period (eg, 20 seconds) before the first power outage exceed 5%, if so, proceeding to step S16, if not, proceeding to step S17.

[0079] S16, recording the AC input power of a preset time (such as 20 seconds) before the first power failure as the maximum power value at the current time.

[0080] S17, recording the average power of a preset time (such as 20 seconds) before the first power failure as the maximum power value of the current time.

[0081] S18, determine whether the average power within the preset time before the second power outage in the same period as the current time is greater than the average power within the preset time before the first power outage. If so, proceed to step S19, if not, proceed to step S20.

[0082] S19, when power is turned on again, the household electrical appliance is controlled at a power lower than the average power within a preset time period before the second power outage.

[0083] S20, when power is turned on again, the household electrical appliance is controlled with a current value lower than the shutdown current during the second power outage.

[0084] S21, exit the first control mode.

[0085] In general, through the above-mentioned control method, when no power saving level setting instruction is received, there are no power saving setting parameters for the same period as the current time, and there are no self-learning historical parameters for the same period as the current time, the household appliance can also automatically adjust the control parameters of the device operation after power-on, reducing power grid anomalies or power outages caused by overload faults, and reducing the impact of the equipment on the power grid during operation, thereby effectively improving the safety of equipment operation and enhancing the reliability of the power grid.

[0086] Figure 8 1 is a flow chart of a control method for a household appliance in a second control mode according to an embodiment of the present invention. The control method for a household appliance in the second control mode at least includes steps S100-S106, which are as follows: S100, start.

[0087] S101, home appliances are turned on.

[0088] S102: Determine whether a power saving level setting instruction actively sent by a user is received.

[0089] S103, entering the second control mode, and controlling the device body according to the control parameters included in the received power saving level setting instruction.

[0090] S104, recording the time point of starting the second control mode and the set power saving level.

[0091] S105, determining to manually exit the second control mode.

[0092] S106, recording the time point of exiting the second control mode.

[0093] In general, through the above control method, when receiving a power saving level setting instruction, the device can control the device body according to the control parameters included in the received power saving level setting instruction, thereby meeting the power saving needs of the user.

[0094] Fig. 9 1 is a flow chart of a control method for a household appliance in a third control mode according to an embodiment of the present invention. The control method for a household appliance in the third control mode at least includes steps S200-S206, which are as follows: S200, start.

[0095] S201, turning on the home appliances.

[0096] S202: Determine that no power saving level setting instruction is received and there are power saving setting parameters for the same period as the current time.

[0097] S203, entering the third control mode, controlling the device body according to the power saving setting parameters of the same period as the current time.

[0098] S204, recording the time point of starting the third control mode and the power saving setting parameters.

[0099] S205, determining to manually exit the third control mode.

[0100] S206, recording the time point of exiting the third control mode.

[0101] In general, through the above control method, when no power saving level setting instruction is received and there are power saving setting parameters that are consistent with the current time, the device can control the device body according to the power saving setting parameters that are consistent with the current time, thereby improving the safety of device operation and the reliability of the power grid.

[0102] Fig.10 1 is a flow chart of a control method for a household appliance in a fourth control mode according to an embodiment of the present invention. The control method for a household appliance in the fourth control mode includes at least steps S300 to S306, which are as follows: S300, start.

[0103] S301, turning on the home appliance.

[0104] S302: Determine that no power saving level setting instruction has been received and there is no power saving setting parameter for the same period as the current time.

[0105] S303, entering the fourth control mode, controlling the device body according to the self-learning historical parameters stored last time at the same time as the current time.

[0106] S304, recording the time point of starting the fourth control mode and the self-learning historical parameters.

[0107] S305, determining to manually exit the fourth control mode.

[0108] S306, recording the time point of exiting the fourth control mode.

[0109] In general, through the above-mentioned control method, when the power saving level setting instruction is not received and there are no power saving setting parameters that are consistent with the current time, the device can control the device body according to the self-learning historical parameters that were stored last time and are consistent with the current time, thereby achieving automatic adjustment of the control parameters of the device operation when it is powered on next time after a power outage, reducing power grid anomalies or power outages caused by overload faults, and reducing the impact of the equipment on the power grid during operation, thereby improving the safety of equipment operation and the reliability of the power grid.

[0110] Fig.11 4 is a flowchart of a control method for switching a household appliance to different control modes according to an embodiment of the present invention. The control method for switching a household appliance to different control modes at least includes steps S400-S419.

[0111] S400, start.

[0112] S401, home appliances are turned on.

[0113] S402, determining whether the user has received a power saving level setting instruction, if so, proceeding to step S403, if not, proceeding to step S407.

[0114] S403, entering the second control mode, and controlling the device body according to the control parameters included in the received power saving level setting instruction.

[0115] S404, recording the time point of starting the second control mode and the set power saving level.

[0116] S405, determining to manually exit the second control mode.

[0117] S406, recording the time point of exiting the second control mode.

[0118] S407, determine whether there are power saving setting parameters for the same period as the current time, if so, proceed to step S408, if not, proceed to step S413.

[0119] S408, entering the third control mode, controlling the device body according to the power saving setting parameters of the same period as the current time.

[0120] S409, determining whether the user receives a power saving level setting instruction when executing the third control mode, if so, returning to step S403, if not, proceeding to step S410.

[0121] S410, recording the time point of starting the third control mode and the power saving setting parameters.

[0122] S411, determining to manually exit the third control mode.

[0123] S412, recording the time point of exiting the third control mode.

[0124] S413, determine whether the memory stores self-learning historical parameters, if so, proceed to step S414.

[0125] S414, entering the fourth control mode, controlling the device body according to the self-learning historical parameters stored last time at the same time as the current time.

[0126] S415, determining whether the user receives a power saving level setting instruction when executing the fourth control mode, if so, returning to step S403, if not, proceeding to step S416.

[0127] S416, recording the time point of starting the fourth control mode and the self-learning historical parameters.

[0128] S417, determining to manually exit the fourth control mode.

[0129] S418, recording the time point of exiting the fourth control mode.

[0130] S419, enter the first control mode.

[0131] In general, the corresponding control mode can be automatically switched according to whether the user issues a power-saving level setting instruction, whether there are power-saving setting parameters for the same period as the current time, and whether there are self-learning historical parameters for the same period as the current time. This method can adjust the control parameters when the device is powered on, reduce power grid anomalies or power outages caused by overload faults, and reduce the impact of the device on the power grid during operation, thereby improving the safety of equipment operation and the reliability of the power grid.

[0132] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0133] Although the 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 household appliance, characterized in that: include: Equipment body; A sampling module, arranged on the device body, for collecting working parameters of the device body; A memory, arranged in the device body, for storing historical working parameters of the device body before the first power failure; A controller, the controller is connected to the sampling module and the memory, and the controller is configured to: In the first control mode, in response to a power-on instruction of the device body, determining that the first power-off is an overload fault according to the historical working parameters, wherein the first power-off is a power-off before the current power-on; The current target control parameter is determined according to the historical operating parameter of the first power outage, wherein the current target control parameter is smaller than the historical operating parameter of the first power outage.

2. The household appliance according to claim 1, characterized in that: The first control mode satisfies the following conditions: no power saving level setting instruction is received, no power saving setting parameters in the same period as the current time exist, and no self-learning history parameters in the same period as the current time exist.

3. The household appliance according to claim 1, characterized in that: The current target control parameter includes a current target control current value, and the current target control current value is smaller than the shutdown current value during the first power outage.

4. The household appliance according to claim 1, characterized in that: The historical operating parameters include the AC input current and AC input power of the device body; The controller is also configured to determine that the power failure of the device body is the overload fault when the AC input current exceeds the shutdown protection current threshold and / or the AC input power exceeds the shutdown protection power threshold.

5. The household appliance according to any one of claims 1 to 4, characterized in that: The controller is also configured to: After the operation of the device body is controlled according to the target control parameters of this time, the device body overloads again and loses power for a second time. When the average power within the preset time length before the second power off is greater than the average power within the preset time length before the first power off, the household appliance is controlled at a power lower than the average power within the preset time length before the second power off when it is powered on again.

6. The household appliance according to any one of claims 1 to 4, characterized in that: The controller is also configured to: After the operation of the device body is controlled according to the target control parameters of this time, if the device body overloads again and power is cut off for a second time, and the average power within the preset time before the second power off is less than or equal to the average power within the preset time before the first power off, then when power is turned on again, the household appliance is controlled with a current value lower than the shutdown current during the second power off.

7. The household appliance according to claim 2, characterized in that: The household appliance further comprises a receiving module, which is connected to the controller and is used to receive a power saving level setting instruction; The controller is further configured to: in a second control mode, control the device body according to the control parameters included in the received power saving level setting instruction; The second control mode satisfies the following condition: the power saving level setting instruction is received.

8. The household appliance according to claim 7, characterized in that: The memory is also used to store power saving setting parameters set by the user; The controller is further configured to: in a third control mode, control the device body according to a power saving setting parameter of the same period as the current time; The third control mode satisfies the following conditions: the power saving level setting instruction is not received and there are power saving setting parameters that are in the same period as the current time.

9. The household appliance according to claim 8, characterized in that: The memory is also used to store self-learning historical parameters; The controller is further configured to: in a fourth control mode, control the device body according to the self-learning historical parameters stored last time at the same time as the current time; The fourth control mode satisfies the following conditions: the power saving level setting instruction is not received and there is no power saving setting parameter in the same period as the current time.

10. The household appliance according to claim 9, characterized in that: The controller is further configured to: in the third control mode or the fourth control mode, upon receiving the power saving level setting instruction when the device body is working, control the operation of the device body according to the control parameters included in the power saving level setting instruction.

11. A method for controlling a household appliance, characterized in that: include: In the first control mode, in response to a power-on instruction of the device body, determining that the first power outage is an overload fault according to historical working parameters of the first power outage, wherein the first power outage is a power outage before the current power-on; Determine the current target control parameter according to the historical operating parameter of the first power outage, wherein the current target control parameter is less than the historical operating parameter of the first power outage; The first control mode satisfies the following conditions: no power saving level setting instruction is received, no power saving setting parameters for the same period as the current time exist, and no self-learning history parameters for the same period as the current time exist.

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