Patent Description:
A motor control application of high-speed hairdryer usually has a large filter capacitor. When a power supply is turned off, the filter capacitor will also store part of the power, which can be used for microcontroller units (MCU) to work for a period of time. In the application of high-speed motor of related technologies, operation of MCU will be stopped when the power is powered off. All operations will be executed when the power supply is powered on. However, if operation such as flash writing is executed while the motor is running, it may interfere with the high-speed timing of motor drive and lead to some errors.

<CIT> discloses a dryer including a main body shell and a gripping handle. By blowing air from an air blowing unit to a heat generating unit equipped with a heater, and by intermittently energizing the heater through a control unit at predetermined time intervals, hot air and cold air can be generated intermittently.

<CIT> discloses a hair dryer including a dryer body, a blowing unit, a heating unit, a hair temperature measuring unit, a reporting unit for reporting the condition of the hair, a timer for counting hair drying time, and a calculation unit for calculating an output based on an output result from the hair temperature measurement unit. The calculation unit is configured to calculate a target temperature to be heated based on the hair drying time counted by the timer; determine whether the temperature measured by the hair temperature measuring unit has reached the target temperature based on the output result from the hair temperature measuring unit; and control the output to the reporting unit based on whether the temperature of the heated hair has reached the target temperature.

<CIT> discloses an artificial intelligence type household hair dryer which includes an intelligent hair dryer and an intelligent CPU. An output end of the intelligent CPU is electrically connected to an input end of an external temperature sensing module and an input end of a temperature sensing module inside the hair dryer. An output end of the external temperature sensing module is electrically connected to an input end of an external temperature index detection module. By keeping the internal temperature of the hair dryer and the external temperature value between <NUM> to <NUM> degrees Celsius, the problem of excessive hair dryer temperature and hair damage is reduced.

The present invention provides a hairdryer control method, a device and a storage medium, which is capable of reasonably using remaining electric energy after power failure to execute power down task.

An embodiment of the present invention provides a hairdryer control method, wherein a temperature sensor is disposed in an air inlet channel of a hairdryer. The hairdryer control method includes:.

In a possible embodiment, determining the temperature adjustment value corresponding to the temperature difference between the air inlet temperature and the standard temperature, includes:.

In a possible embodiment, the device information includes a model of the hairdryer and/or a model of the heating device.

In a possible embodiment, obtaining the upper temperature limit value corresponding to the standard temperature of the hairdryer in the current working mode, includes:.

In a possible embodiment, the method further includes:
performing temperature protection of the hairdryer according to the upper temperature limit value corresponding to the air inlet temperature, within a preset duration after the hairdryer is switched to the current working mode.

In a possible embodiment, a value of the preset duration is determined based on a duration when an air outlet temperature of an air outlet channel of the hairdryer reaches a stable level after the hairdryer is switched to the current working mode.

In a possible embodiment, performing the temperature protection of the hairdryer according to the upper temperature limit value corresponding to the air inlet temperature, includes:
controlling the hairdryer to stop working, when an air outlet temperature of an air outlet channel of the hairdryer is greater than or equal to the upper temperature limit value corresponding to the air inlet temperature.

An embodiment of the present invention provides a hairdryer control device, wherein a temperature sensor is disposed in an air inlet channel of a hairdryer. The hairdryer control device includes:.

The hairdryer control method, the device and the storage medium provided by the embodiments of the present invention can solve the problem that the hairdryer may be stopped by mistake by using a fixed upper temperature limit value for temperature protection control in high-temperature environments by: obtaining the air inlet temperature collected by the temperature sensor which is additionally set in the air inlet channel of the hairdryer; obtaining the upper temperature limit value corresponding to the standard temperature of the hairdryer in the current working mode, wherein the upper temperature limit value is adapted to trigger the temperature protection of the hairdryer; determining the temperature adjustment value corresponding to the temperature difference between the inlet air temperature and the standard temperature; and adjusting the upper temperature limit value corresponding to the standard temperature according to the temperature adjustment value so as to obtain the upper temperature limit value corresponding to the inlet air temperature. Since the corresponding upper temperature limit value can be adjusted under high-temperature environment, using the adjusted upper temperature limit value for temperature protection control can reduce the probability of stopping the hairdryer by mistake and improve the accuracy of temperature protection control.

The above description is only an overview of technical schemes of the present invention. In order to better understand the technical means of the present invention and implement them in accordance with the contents of the description, the embodiments of the present invention and the accompanying drawings are described in detail below.

Specific embodiments of the present invention will be described in further detail below in combination with accompanying drawings and implementation examples. The following embodiments are adapted to illustrate the present invention, but are not adapted to limit the scope of the present invention.

In related technologies, a motor control application of high-speed hairdryer usually includes a large filter capacitor. When the power supply is turned off, the filter capacitor will also store part of the power, which can be used for the micro controller unit (MCU) to work for a period of time. In the application of high-speed motor of related technologies, generally, the MCU will be stopped working when the power is cut off, and all operations will be executed in the state of power on. However, if the operation such as flash writing is executed while the motor is running, it may interfere with the high-speed timing of motor drive, thereby resulting in some errors.

Firstly, some terminologies involved in the present invention will be explained.

A filter capacitor is an energy storage device installed at both ends of a rectifier circuit in order to reduce AC ripple coefficient, and improve efficient and smooth DC output. Because of the filter circuit, it requires a large capacitance of the energy storage capacitor.

A micro controller unit (MCU), also known as a single chip microcomputer, is a chip-level computer which appropriately reduces the frequency and specification of a central process unit (CPU), and integrates a memory, a timer, a USB, a A/D conversion, a universal asynchronous receiver/transmitter (UART), a programmable logic controller (PLC), a direct memory access (DMA) and other peripheral interfaces, and even a liquid crystal display (LCD) driver circuit on a single chip to form a chip level computer, for executing different combined control for different applications.

<FIG> is a hairdryer control method provided by an embodiment of the present invention, which is applicable to a device with a high-speed motor. In a high-speed motor control application, it usually includes a large filter capacitor. After the device is turned off, part of the power will be stored in the filter capacitor for MCU to continue working for a period of time. The hairdryer control method includes at least the following steps:.

The power down task is a task which cannot be executed when the hairdryer is turned on. If this task is executed when the hairdryer is turned on, it will cause interference to the high-speed timing of motor drive, and then lead to some wrong results. In this embodiment, the power down task includes one or more of a braking task, a flash writing task and others. For example, the flash writing process needs to turn off all interrupts of other components. If an error occurs in this process, it may cause the high-speed motor to run disorderly, and even cause the flash writing operation to overwrite the normal ROM program body, resulting in unpredictable results. In other embodiments, the power down task can also include others, which is not specifically limited here and depends on the actual situation.

In a possible embodiment, the power down task is stored in a power down file in a form of queue lines, so that after one power down task is executed, a next power down task can be executed. In other embodiments, the power down task can also be stored in the power down task in other forms, depending on actual situations which will not be specifically limited here.

In a possible embodiment, the method further includes a step of:
obtaining a current duration which is a duration from receiving the hairdryer turn-off signal to the current time.

When the current duration is greater than a preset duration, the power down task is stopped. When the hairdryer turn-off signal is received for a period of time, and the duration of this period is greater than the preset duration, remaining power down tasks will be stopped. Specifically, the preset duration is a duration from the beginning of discharge of the filter capacitor to the end of discharge.

In summary, by receiving the hairdryer turn-off signal which is adapted to stop the hairdryer; then, detecting whether or not there is a power down task, and executing the power down task when the power down task is detected; some tasks are avoided to affect the driving process of the hairdryer because they are executed when the hairdryer is turned on. By making rational use of the electric energy stored in the filter capacitor, some power loss tasks are executed after the hairdryer is turned off and before the discharge of the filter capacitor is completed, so as to reduce the impact of power loss tasks on the motor driving process.

<FIG> is a hairdryer control device provided by an embodiment of the present invention. The hairdryer control device includes at least:.

Relevant details can be referred to the above method embodiment.

It should be noted that when the hairdryer control device provided in the above embodiment controls the hairdryer, only the division of the above functional modules is illustrated. In practical applications, the above functions can be allocated by different functional modules according to needs. That is, the internal structure of the hairdryer control device is divided into different functional modules to complete all or part of the functions described above. In addition, the hairdryer control device provided by the above embodiment belongs to the same concept as the hairdryer control method embodiment. The specific implementation process of the hairdryer control device can be referred to the method embodiment in detail, which will not be repeated here.

<FIG> is a hairdryer control device provided by another embodiment of the present invention. The hairdryer control device includes at least a processor <NUM> and a memory <NUM>.

The processor <NUM> may include one or more processing cores, such as a <NUM>-core processor, an <NUM>-core processor, etc. The processor can be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array) and PLA (Programmable Logic Array). The processor <NUM> may also include a main processor and a coprocessor. The main processor is a processor adapted to process data in a wake-up state, which is also known as a CPU (Central Processing Unit). The coprocessor is a low-power processor for processing data in a standby mode.

The memory <NUM> may include one or more computer-readable storage media. The computer-readable storage medium may be non-transient. The memory <NUM> may also include a high-speed random access memory and a nonvolatile memory, such as one or more disk storage devices and flash storage devices. In some embodiments, a non-transient computer-readable storage medium in the memory <NUM> is adapted to store at least one instruction. The at least one instruction is executed by the processor <NUM> to implement the hairdryer control method provided by the method embodiment of the present invention.

In some embodiments, the hairdryer control device also optionally includes a peripheral interface and at least one peripheral device. The processor <NUM>, the memory <NUM> and the peripheral device interface can be connected through a BUS or a signal line. Each peripheral device can be connected with the peripheral device interface through a BUS, a signal line or a circuit board. Schematically, the peripheral devices include but are not limited to a RF circuit, a touch screen, an audio circuit, and a power supply, etc..

Of course, the hairdryer control device may also include fewer or more components, which is not limited in the present embodiment.

In a possible embodiment the present invention also provides a computer-readable storage medium having a program stored in the computer-readable storage medium. The program is loaded and executed by the processor to implement the hairdryer control method of the above method embodiment.

In a possible embodiment, the present invention also provides a computer product. The computer product includes a computer-readable storage medium having a program stored in the computer-readable storage medium. The program is loaded and executed by the processor to implement the hairdryer control method of the above method embodiment.

The technical features of the above embodiments can be combined arbitrarily. In order to simplify the description, all possible combinations of each technical feature in the above embodiment are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be the scope recorded in this specification.

In related technologies, in order to realize the functions of constant temperature output and temperature protection of the hairdryer, the most important thing is the stability of the external temperature value obtained by the temperature sensor. If the temperature value obtained is unstable, it will not be beneficial to constant temperature control, and it is easy to trigger temperature protection by mistake. The hairdryers of related technologies basically use a simple algorithm to filter out some external interference. However, these method cannot detect whether the temperature is stable or not at the moment.

Firstly, several terminologies related to the embodiments of the present invention are introduced as follows.

An analog to digital converter (ADC) is an electronic component which converts analog signals into digital signals.

The hairdryer control method disclosed in the embodiments of the present invention is specifically applied to the control of a heating device. The control method of the heating device can also be applied to the control of heating devices such as heaters. The embodiment of the present invention does not specifically limit the application of the control of the heating device.

<FIG> is a flowchart of a hairdryer control method provided by an embodiment of the present invention. The hairdryer control method is used for determining the temperature of the hairdryer. The method includes at least the following step:
step <NUM>, obtaining a temperature detection window which is adapted to collect temperature values within a preset window duration determined based on a current detection time.

In a possible embodiment, obtaining the temperature detection window includes:
determining the current detection time as an upper limit value of the temperature detection window, and determining the time corresponding to the preset window duration before the current detection time as a lower limit value of the temperature detection window, thereby obtaining the temperature detection window.

In a possible embodiment, obtaining the temperature detection window includes: determining the current detection time as a lower limit value of the temperature detection window, and determining the time corresponding to the preset window duration after the current detection time as an upper limit value of the temperature detection window, thereby obtaining the temperature detection window. step <NUM>, determining whether the current output temperature of the hairdryer is stable or not based on each temperature value in the temperature detection window.

In a possible embodiment, determining whether the current output temperature of the hairdryer is stable or not based on each temperature value in the temperature detection window, includes:.

In a possible embodiment, the temperature threshold is determined based on the average temperature of the corresponding temperature detection window at the previous time.

In a possible embodiment, the hairdryer control method further includes:.

In summary, the hairdryer control method provided in this embodiment can accurately monitor temperature changes and capture the sudden changes in temperature, by obtaining the temperature detection window to collect the temperature values within the preset window duration determined based on the current detection time; and determining whether the current output temperature of the hairdryer is stable or not based on each temperature value in the temperature detection window.

The heating device can be a heating wire, etc., which is not specifically limited here and depends on the actual situation. A fixed power of the heating device depends on its actual situation and is not specifically limited here.

Referring to <FIG>, it is described in detail in a specific embodiment.

Specific steps of the hairdryer control method are as follows:.

It should be noted that the above steps are executed after the hairdryer is started. Specifically, after the hairdryer is started, it is determined whether the starting time of the heating device reaches the preset duration. When the starting time of the heating device reaches the preset duration, the temperature sensor is triggered. The preset duration can be set according to factors such as the hairdryer temperature and the starting time. As in this embodiment, the preset duration is <NUM>, and the temperature sensor is triggered <NUM> after the hairdryer is started.

<FIG> is a block diagram of a hairdryer control device provided by an embodiment of the present invention. The hairdryer control device includes at least the following modules:.

It should be noted that when the hairdryer control device provided in the above embodiment controls the hairdryer, only the division of the above functional modules is illustrated. In practical applications, the above functions can be allocated by different functional modules according to needs. That is, the internal structure of the temperature detection and correction device is divided into different functional modules to complete all or part of the functions described above. In addition, the temperature detection and correction device provided in the above embodiment belongs to the same concept as the embodiment of the hairdryer control method. The specific implementation process of the hairdryer control device can be referred to the method embodiment in detail, which will not be repeated here.

<FIG> is a block diagram of a hairdryer control device provided by an embodiment of the present invention. The hairdryer control device includes at least a processor <NUM> and a memory <NUM>.

The processor <NUM> may include one or more processing cores, such as a <NUM>-core processor, an <NUM>-core processor, etc. The processor <NUM> can be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array) and PLA (Programmable Logic Array). The processor <NUM> may also include a main processor and a coprocessor. The main processor is a processor adapted to process data in a wake-up state, which is also known as a CPU (Central Processing Unit). The coprocessor is a low-power processor for processing data in a standby mode.

In related technologies, it is necessary to detect the power supply voltage during the operation of the hairdryer to detect whether the hairdryer works within the normal voltage range. If the heating device is turned on during detection, it will interfere with the detection voltage and make the detection data deviate. This will cause deviation to the later power control and temperature control, and even the problem of false triggering of voltage protection.

Firstly, some terminology involved in the present invention is introduced as follows:.

<FIG> is a flowchart of a hairdryer control method provided by an embodiment of the present invention. The hairdryer control method is used for determining the temperature of the hairdryer. The method comprises at least the following steps:
step <NUM>, determining a first working duration and a second working duration of a heating device, when the heating device is started;.

In a possible embodiment, after the heating device is started, the first working duration and the second working duration form a cycle.

In a possible embodiment, the first operating time is a time when the heating device is in a non-working state.

In a possible embodiment, the calculation method of the first working duration is a duration from an end of a last second working duration and a delay of a preset duration to a beginning of a next second working duration is determined as the first working duration.

In a possible embodiment, the second working duration is a time when the heating device is in a working state. step <NUM>, detecting power supply parameters of the heating device during the first working duration.

In a possible embodiment, detecting power supply parameters of the heating device during the first working duration includes: obtaining and detecting the power supply voltage of the heating device during the first working duration.

In a possible embodiment, detecting power supply parameters of the heating device during the first working duration includes: obtaining and detecting the power supply current of the heating device during the first working duration.

In summary, the hairdryer control method provided in this embodiment solves the interference caused by the operation of the heating device to the detection of power parameters by determining the first working duration and the second working duration of the heating device after the heating device is started; and detecting the power supply parameters of the heating device during the first working duration.

The hairdryer control method completes the detection of the power supply voltage when the heating device is not working (within the first working duration), which is equivalent to leaving a half wave in the working cycle of the heating device to detect the power supply voltage.

The memory <NUM> may include one or more computer-readable storage media. The computer-readable storage medium may be non-transient. The memory <NUM> may also include a high-speed random access memory and a nonvolatile memory, such as one or more disk storage devices and flash storage devices. In some embodiments, a non-transient computer-readable storage medium in the memory <NUM> is adapted to store at least one instruction. The at least one instruction is executed by the processor <NUM> to implement the temperature detection and correction method provided by the method embodiment of the present invention.

In related technologies, air volume of each part of the air outlet is inconsistent due to the internal structure of the hairdryer in the working process. This will lead to the low accuracy of the temperature value detected by the internal temperature sensor, and if the detected temperature deviation is too large, it is easy to trigger temperature protection and other operations.

<FIG> is a flowchart of a hairdryer control method provided by an embodiment of the present invention. The hairdryer control method is used for determining the temperature of the hairdryer. The method includes at least the following steps:.

In a possible embodiment, adjusting working parameters of the heating device by a control device according to the temperature value obtained at each point of the air outlet of the hairdryer, includes:.

In a possible embodiment, the hairdryer control method further includes:
confirming test interval; and determining whether or not a detection time for a next detection of the temperature value at each point is reached, after the working parameters of the heating device are adjusted by the control device; if yes, triggering the step of "obtaining a temperature value at each point of an air outlet of a hairdryer".

In a possible embodiment, determining whether or not a detection time for a next detection of the temperature value at each point is reached, includes:.

In a possible embodiment, the method further includes:.

In summary, the control method of the hairdryer provided in this embodiment solves the error of the sampling temperature of the temperature sensor due to the inconsistency of the air outlet temperature of each part of the air outlet, by obtaining the temperature value of each point of the air outlet of the hairdryer; and adjusting the working parameters of the heating device by the controller according to the temperature value obtained at each point of the air outlet of the hairdryer.

A hairdryer control method provided by an embodiment of the present invention including:.

<FIG> is a block diagram of a hairdryer control device provided by the embodiment of the present invention. The hairdryer control device includes at least the following modules:.

In related technologies, in order to ensure the safety of the working process of the hairdryer, a control system of the hairdryer usually includes a temperature protection control. The temperature protection control refers to a protection mechanism to control the shutdown of the hairdryer when the outlet temperature of the hairdryer is higher than the upper temperature limit.

However, the working environment of hairdryers may be diverse. In high-temperature environments, the outlet temperature of the hairdryer may be higher than the upper temperature limit value corresponding to the standard temperature (i.e., <NUM>), and the hairdryer can still work normally. If the temperature protection control is executed at this time, the hairdryer may be shut down by mistake.

<FIG> is a structural diagram of a hairdryer provided by an embodiment of the present invention. As shown in <FIG>, the hairdryer includes at least a processing component <NUM>, a temperature sensor <NUM> arranged in an air inlet channel of the hairdryer, and a temperature sensor <NUM> arranged in an air outlet channel of the hairdryer.

The type of temperature sensor <NUM> and the type of temperature sensor <NUM> are the same or different. For example, the temperature sensor <NUM> and the temperature sensor <NUM> are negative temperature coefficient (NTC) sensors.

Both the temperature sensor <NUM> and the temperature sensor <NUM> are connected in communication with the processing component <NUM>.

The temperature sensor <NUM> is adapted to collect the air inlet temperature of the air inlet channel of the hairdryer; and send the inlet air temperature to the processing component <NUM>. The inlet air temperature is similar to the ambient temperature. Of course, in other embodiments, the temperature sensor <NUM> may also be arranged on a housing of the hairdryer. The present embodiment does not limit the installation position of the temperature sensor <NUM>.

The temperature sensor <NUM> is adapted to collect the air outlet temperature of the air outlet channel of the hairdryer; and send the outlet air temperature to the processing component <NUM>.

The number of temperature sensors <NUM>, <NUM> may be one or more. The present embodiment does not limit the number of temperature sensors <NUM>, <NUM>.

In this embodiment, the processing component <NUM> is adapted to obtain the inlet air temperature collected by the temperature sensor <NUM>; obtain the upper temperature limit value corresponding to the standard temperature of the hairdryer in the current working mode, and the upper temperature limit value is adapted to trigger the temperature protection of the hairdryer; determine the temperature adjustment value corresponding to the temperature difference between the inlet air temperature and the standard temperature; and adjust the upper temperature limit value corresponding to the standard temperature according to the temperature adjustment value so as to obtain the upper temperature limit value corresponding to the inlet air temperature.

After determining the upper temperature limit value corresponding to the inlet air temperature, the processing component <NUM> executes temperature protection for the hairdryer according to the upper temperature limit value corresponding to the inlet air temperature. For example, when the outlet air temperature collected by the temperature sensor <NUM> is greater than the upper temperature limit value corresponding to the inlet air temperature, the hairdryer is controlled to stop. In other embodiments, when the outlet air temperature collected by the temperature sensor <NUM> is greater than the upper temperature limit value corresponding to the inlet air temperature, the processing component <NUM> can also reduce the working power. This embodiment does not limit the execution mode of temperature protection.

<FIG> is a flowchart of a hairdryer control method provided by an embodiment of the present invention. In this embodiment, the method is applied to the hairdryer shown in <FIG>, and the main body of each step is the processing component <NUM> in the system. The method includes at least the following step:
step <NUM>, obtaining an air inlet temperature collected by the temperature sensor in the air inlet channel, and executing step <NUM>.

In a possible embodiment, the processing component triggers the temperature sensor in the air inlet channel to work after the hairdryer switches the working mode, and obtains the air inlet temperature collected by the temperature sensor in the air inlet channel. Alternatively, the processing component obtains the air inlet temperature collected by the temperature sensor in the air inlet channel in real time.

The method further includes the following step:
step <NUM>, obtaining the upper temperature limit value corresponding to the standard temperature of the hairdryer in the current working mode. The upper temperature limit value is adapted to trigger the temperature protection of the hairdryer, and step <NUM> is executed.

The upper temperature limit value corresponding to the standard temperature is stored in the hairdryer. The standard temperature can be <NUM>, <NUM>, etc. In this embodiment, the value of the standard temperature is not limited.

In a possible embodiment, the upper temperature limit value corresponding to the standard temperature is different for different working modes. The working modes include a working range which includes a temperature control range and/or a wind speed control range. At this time, obtaining the upper temperature limit value corresponding to the standard temperature of the hairdryer in the current working mode, includes: obtaining the temperature corresponding relationship between the working range and the upper temperature limit value; and determining the upper temperature limit value corresponding to the standard temperature based on the corresponding relationship between the current working range and the temperature.

For example, the temperature correspondence between the working range and the upper temperature limit value is shown in a first table below. When the working range is a wind speed control range <NUM> and temperature control range <NUM>, the upper temperature limit value corresponding to the standard temperature is <NUM>.

In a possible embodiment, the step <NUM> may be executed before the step <NUM>; or, it may be executed after the step <NUM>; or, it may be executed simultaneously with the step <NUM>.

The method further includes the following step:
step <NUM>, determining the temperature adjustment value corresponding to the temperature difference between the inlet air temperature and the standard temperature.

The temperature adjustment relationship between the temperature difference and the temperature adjustment value is stored in the hairdryer. In a possible embodiment, the temperature adjustment relationship can be the corresponding relationship between the temperature difference and the temperature adjustment value; or, it can also be an adjustment formula between the temperature difference and the temperature adjustment value. There is a positive correlation between the temperature difference and the temperature adjustment value. That is, the greater the temperature difference, the greater the temperature adjustment value; and the smaller the temperature difference, the smaller the temperature adjustment value.

In one example, different device information corresponds to different temperature adjustment relationships. At this time, the processing component obtains the device information of the hairdryer; determines the temperature adjustment relationship, which at least includes the corresponding relationship between the temperature difference and the temperature adjustment value, corresponding to the device information; and determines the temperature adjustment value based on the temperature difference and the temperature adjustment relationship.

In a possible embodiment, the device information includes a model of the hairdryer and/ or a model of the heating device.

In another example, different device information corresponds to the same temperature adjustment relationship.

The method further includes the following step:
step <NUM>: adjusting the upper temperature limit value corresponding to the standard temperature according to the temperature adjustment value so as to obtain the upper temperature limit value corresponding to the inlet air temperature.

The processing component determines the sum of the upper temperature limit value corresponding to the standard temperature and the temperature adjustment value as the upper temperature limit value corresponding to the inlet air temperature.

In a possible embodiment, after the processing component determines the upper temperature limit value corresponding to the air inlet temperature, the hairdryer is temperature protected according to the upper temperature limit value corresponding to the air inlet temperature within a preset duration after the hairdryer is switched to the current working mode.

The preset duration is determined based on the duration when the outlet temperature of the outlet channel of the hairdryer reaches a stable time period after the hairdryer is switched to the current working mode. The preset duration is greater than or equal to the duration when the air outlet temperature of the air outlet channel reaches the stable time period.

Referring to <FIG>, since the outlet temperature is unstable and abrupt within a period of time after the hairdryer is switched to the current operating mode, refer to stage <NUM> in <FIG>. In the stage <NUM>, there is a high probability that the outlet air temperature in the high-temperature environment exceeds the upper temperature limit value corresponding to the standard temperature. However, in the outlet temperature stage <NUM>, the probability that the outlet temperature in the high-temperature environment exceeds the upper temperature limit value corresponding to the standard temperature is small. In the stage <NUM>, if the outlet temperature exceeds the upper temperature limit value corresponding to the standard temperature, the normal operation of the hairdryer will not be affected. Therefore, only the upper temperature limit value of the stage <NUM> needs to be adjusted.

In a possible embodiment, when the air outlet temperature of the air outlet channel of the hairdryer is greater than or equal to the upper temperature limit value corresponding to the air inlet temperature, the way for the processing component to protect the temperature of the hairdryer includes controlling the hairdryer to stop working. Of course, the temperature of the hairdryer can also be protected by reducing the working power of the hairdryer. This embodiment does not limit the method of temperature protection of the hairdryer by the processing component.

In summary, the hairdryer control method provided in this embodiment can solve the problem that the hairdryer may be shut down by mistake by using a fixed upper temperature limit value for temperature protection control in a high-temperature environment, via setting the additional temperature sensor in the air inlet channel of the hairdryer to collect the inlet temperature in the air inlet channel; obtaining the upper temperature limit value corresponding to the standard temperature of the hairdryer in the current working mode, and the upper temperature limit value is adapted to trigger the temperature protection of the hairdryer; determining the temperature adjustment value corresponding to the temperature difference between the inlet air temperature and the standard temperature; and adjusting the upper temperature limit value corresponding to the standard temperature according to the temperature adjustment value so as to obtain the upper temperature limit value corresponding to the inlet air temperature. Since the corresponding upper temperature limit value can be adjusted under high-temperature environment, using the adjusted upper temperature limit value for temperature protection control can reduce the probability of false shutdown of the hairdryer and improve the accuracy of temperature protection control.

<FIG> is a block diagram of a hairdryer control device provided in an embodiment of the present invention. The present embodiment takes the application of the device to the hairdryer shown in <FIG> as an example. The air inlet channel of the hairdryer is provided with a temperature sensor. The device includes at least the following modules: a temperature acquisition module <NUM>, an upper limit value acquisition module <NUM>, an adjustment value determination module <NUM>, and an upper limit value adjustment module <NUM>.

The temperature acquisition module <NUM> is adapted to obtain the air inlet temperature collected by the temperature sensor on the air inlet channel.

The upper limit value acquisition module <NUM> is adapted to obtain the upper limit value of the temperature corresponding to the standard temperature of the hairdryer in the current working mode. The upper temperature limit value is adapted to trigger the temperature protection of the hairdryer.

The adjustment value determination module <NUM> is adapted to determine the temperature adjustment value corresponding to the temperature difference between the air inlet temperature and the standard temperature.

The upper limit value adjustment module <NUM> is adapted to adjust the upper limit value of the temperature corresponding to the standard temperature according to the temperature adjustment value so as to obtain the upper limit value of the temperature corresponding to the air inlet temperature.

<FIG> is a block diagram of a hairdryer control device provided by the embodiment of the present invention. The hairdryer control device includes at least a processor <NUM> and a memory <NUM>.

In some embodiments, the hairdryer control device also optionally includes a peripheral interface and at least one peripheral device. The processor <NUM>, the memory <NUM> and the peripheral device interface can be connected through a BUS or a signal line. Each peripheral device can be connected with the peripheral device interface through a BUS, a signal line or a circuit board. Schematically, the peripheral devices include but are not limited to an audio circuit and a power supply, etc..

Claim 1:
A hairdryer control method, wherein a temperature sensor (<NUM>) is disposed in an air inlet channel of a hairdryer, the hairdryer control method comprising:
obtaining an air inlet temperature collected by the temperature sensor (<NUM>) in the air inlet channel;
obtaining an upper temperature limit value corresponding to a standard temperature of the hairdryer in a current working mode, the upper temperature limit value being adapted to trigger temperature protection of the hairdryer;
determining a temperature adjustment value corresponding to a temperature difference between the air inlet temperature and the standard temperature; and
adjusting the upper temperature limit value corresponding to the standard temperature according to the temperature adjustment value so as to obtain the upper temperature limit value corresponding to the air inlet temperature.