CN113983664A - Air conditioner, control method thereof, and computer-readable storage medium - Google Patents

Air conditioner, control method thereof, and computer-readable storage medium Download PDF

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Publication number
CN113983664A
CN113983664A CN202111272141.5A CN202111272141A CN113983664A CN 113983664 A CN113983664 A CN 113983664A CN 202111272141 A CN202111272141 A CN 202111272141A CN 113983664 A CN113983664 A CN 113983664A
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China
Prior art keywords
current
module
motor
ipm
current threshold
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CN202111272141.5A
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Chinese (zh)
Inventor
单联瑜
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Beijing Xiaomi Mobile Software Co Ltd
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Beijing Xiaomi Mobile Software Co Ltd
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Priority to CN202111272141.5A priority Critical patent/CN113983664A/en
Publication of CN113983664A publication Critical patent/CN113983664A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The present disclosure relates to an air conditioner, a method of controlling the same, and a computer-readable storage medium, the air conditioner including: the current sampling module is used for collecting the current of the motor and outputting the current to the current protection module and the control module; the current protection module is used for comparing the current of the motor with a preset first current threshold value and outputting a first protection signal to the IPM module when the current exceeds the first current threshold value so as to stop the IPM module; the control module is used for comparing the current with a preset second current threshold value and outputting a second protection signal to the IPM module when the current exceeds the second current threshold value so as to stop the IPM module; the second current threshold is used for protecting the motor and is less than or equal to the first current threshold. In the embodiment, the IPM module can be adapted to different motors, and the application range of the motor control system is favorably expanded.

Description

Air conditioner, control method thereof, and computer-readable storage medium
Technical Field
The present disclosure relates to the field of control technologies, and in particular, to an air conditioner, a control method thereof, and a computer-readable storage medium.
Background
An outdoor unit circuit of an existing air conditioner includes an Intelligent Power Module (IPM) and a single chip microcomputer MCU, wherein the IPM drives a compressor motor and a dc fan motor. Because the IPM module operates in a high-voltage and high-current circuit state, safety monitoring is needed, namely the normal operation of the IPM module can be controlled by the single-chip microcomputer MCU and the safety monitoring is needed, so that the influence of overcurrent on the service life of the motor and the service life of the IPM module is avoided.
Disclosure of Invention
The present disclosure provides an air conditioner, a control method thereof, and a computer-readable storage medium to solve the disadvantages of the related art.
According to a first aspect of an embodiment of the present disclosure, there is provided an air conditioner including a motor control system and a motor; the motor control system comprises a current sampling module, an IPM module, a control module and a current protection module;
the current sampling module is used for collecting the current of the motor and outputting the current to the current protection module and the control module;
the current protection module is used for comparing the current of the motor with a preset first current threshold value and outputting a first protection signal to the IPM module when the current exceeds the first current threshold value so as to stop the IPM module;
the control module is used for comparing the current with a preset second current threshold value and outputting a second protection signal to the IPM module when the current exceeds the second current threshold value so as to stop the IPM module; the second current threshold is used for protecting the motor and is less than or equal to the first current threshold.
Optionally, the control module includes a PWM unit electrically connected to the IPM module, and configured to generate and output a PWM control signal to the IPM module.
Optionally, the control module comprises a current comparison unit; the current comparison unit is electrically connected with the current sampling module and the IPM module respectively, and is used for comparing the current of the motor with a preset first current threshold value and outputting a second protection signal to the IPM module when the current exceeds the first current threshold value.
Optionally, the control module comprises an interrupt unit; the interrupt unit is electrically connected with the current protection module and the IPM module respectively, and is used for generating an interrupt signal when receiving the second protection signal and outputting the interrupt signal to the IPM module.
Optionally, the current sampling module includes a sampling resistor and a first operational amplifier circuit; the sampling resistor is connected between the IPM module and a power supply in series; the first operational amplifier circuit is used for converting the voltage corresponding to the sampling resistor into the current of the motor.
Optionally, the current protection module comprises a voltage divider circuit and a comparator circuit; the voltage division circuit is used for configuring the first current threshold; the comparator circuit comprises a first end, a second end and an output end; the first end is electrically connected with the current sampling module, the second end is electrically connected with the voltage dividing circuit, and the output end is electrically connected with the IPM module.
Optionally, an interaction module is further included; the interaction module is electrically connected with the control module and is used for responding to the input operation of a user to configure the second current threshold value.
According to a second aspect of the embodiments of the present disclosure, there is provided an air conditioner control method, the air conditioner including a motor control system and a motor; the motor control system comprises a current sampling module, an IPM module, a control module and a current protection module; the method comprises the following steps:
the current sampling module collects the current of the motor and outputs the current to the current protection module and the control module;
the current protection module compares the current of the motor with a preset first current threshold value, and outputs a first protection signal to the IPM module when the current exceeds the first current threshold value so as to stop the IPM module;
the control module compares the current with a preset second current threshold value, and outputs a second protection signal to the IPM module when the current exceeds the second current threshold value so as to stop the IPM module; the second current threshold is used for protecting the motor and is less than or equal to the first current threshold.
Optionally, the control module comprises a PWM unit electrically connected with the IPM module; the method further comprises the following steps:
the PWM unit generates a PWM control signal and outputs the PWM control signal to the IPM module.
Optionally, the control module comprises a current comparison unit; the current comparison unit is electrically connected with the current sampling module and the IPM module respectively; the method further comprises the following steps:
the current comparison unit compares the current of the motor with a preset first current threshold value, and outputs a first protection signal to the IPM module when the current exceeds the first current threshold value.
Optionally, the control module comprises an interrupt unit; the interrupt unit is electrically connected with the current protection module and the IPM module respectively; the method further comprises the following steps:
the interrupt unit generates an interrupt signal when receiving the first protection signal, and outputs the interrupt signal to the IPM module.
Optionally, an interaction module is further included; the interaction module is electrically connected with the control module; the method further comprises the following steps:
the interaction module configures the second current threshold in response to an input operation by a user.
According to a third aspect of the embodiments of the present disclosure, there is provided an air conditioner including:
a processor;
a memory for storing a computer program executable by the processor;
wherein the processor is configured to execute the computer program in the memory to implement the method as described above.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium, in which an executable computer program is capable of implementing the method as described above when executed by a processor.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
according to the embodiment, the air conditioner provided by the embodiment of the disclosure comprises a motor control system and a motor; the electric control system comprises a current sampling module, an IPM module, a control module and a current protection module; the current sampling module is used for collecting the current of the motor and outputting the current to the current protection module and the control module; the current protection module is used for comparing the current of the motor with a preset first current threshold value and outputting a first protection signal to the IPM module when the current exceeds the first current threshold value so as to stop the IPM module; the control module is used for comparing the current with a preset second current threshold value and outputting a second protection signal to the IPM module when the current exceeds the second current threshold value so as to stop the IPM module; the second current threshold is used for protecting the motor and is less than or equal to the first current threshold. Thus, in this embodiment, the IPM module is protected by a preset first current threshold, the motor is protected by a preset second current threshold, and the second current threshold is smaller than or equal to the first current threshold, for example, when the protection current of the motor is higher than the second current threshold, the first current threshold may be set to be the same as the second current threshold, and the IPM module and the current are protected by the second current threshold; if the protection current of the motor is lower than the second current threshold, the first current threshold may be set to be smaller than the second current threshold, and the IPM module and the current are protected by the first current threshold, so that the IPM module is adapted to different motors, the application range of the motor control system is widened, the types of the motor control system are reduced, and the development, production and maintenance costs are reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a block diagram illustrating an air conditioner according to an exemplary embodiment.
Fig. 2 is a schematic circuit diagram of an air conditioner according to an exemplary embodiment.
FIG. 3 is a block diagram illustrating a control module in accordance with an exemplary embodiment.
Fig. 4 is a flowchart illustrating an air conditioner control method according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The following exemplary described embodiments do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of devices consistent with certain aspects of the present disclosure as recited in the claims below. It should be noted that, in the following examples and embodiments, features may be combined with each other without conflict.
In order to solve the above technical problem, an embodiment of the present disclosure provides an air conditioner, where the air conditioner is provided with a plurality of motors, such as a motor driving a compressor and a motor driving a dc fan. For convenience of description, the following embodiments only use the motor to describe the scheme of the present disclosure, but do not limit the present disclosure. In order to ensure the normal operation of the motor, the air conditioner further comprises a motor control system, and fig. 1 is a block diagram of an air conditioner according to an exemplary embodiment. Referring to fig. 1, an air conditioner includes a motor control system 10 and a motor 20. The electronic control system 10 includes a current sampling module 11, an IPM module 12, a control module 13, and a current protection module 14. Wherein,
the current sampling module 11 is used for collecting the current of the motor 20 and outputting the current to the current protection module 14 and the control module 13;
the current protection module 14 is configured to compare a current of the motor 20 with a preset first current threshold, and output a first protection signal to the IPM module 12 when the current exceeds the first current threshold, so that the IPM module 12 stops working;
the control module 13 is configured to compare the current with a preset second current threshold, and output a second protection signal to the IPM module 12 when the current exceeds the second current threshold, so that the IPM module 12 stops working; the second current threshold is used to protect the motor 20 and is less than or equal to the first current threshold.
In one embodiment, the current sampling module 11 may include a sampling resistor and a first op-amp circuit. Referring to fig. 2, a sampling resistor Rs is connected in series between the motor 20 and the power supply VDCWherein the first terminal of the sampling resistor Rs is connected to the power supply VDCAnd the second end is electrically connected to the IPM module. A first terminal of the first operational amplifier IC1 is electrically connected to a second terminal of the sampling resistor Rs, and a second terminal of the first operational amplifier IC1 is electrically connected to the current protection module 14 and the control module 13. Thus, the working principle of the current sampling module 11 is as follows:
when the IPM module 12 controls the motor 20 to work, the IPM module 12 and the power supply VDCA current loop is formed between the two. Because the sampling resistor Rs is connected in series in the current loop, the current in the current loop passes through the sampling resistor Rs, and finally, a divided voltage, i.e., a sampling voltage, is formed on the sampling resistor Rs. After the first operational amplifier IC1 obtains the sampled voltage, the sampled current, i.e. the current of the motor, can be obtained through conversion. It should be noted that the first operational amplifier IC1 functions to realize voltage and current conversion, and is essentially a voltage-to-current conversion circuit, that is, a sampled voltage is divided by a sampling resistor to obtain a sampled current, and a specific implementation circuit of the first operational amplifier IC1 is shown in fig. 2.
In one embodiment, the control module 13 may include a PWM unit. Referring to fig. 3, the PWM unit 131 is electrically connected to the IPM module 12, and generates and outputs a PWM control signal to the IPM module 12. In practical application, the PWM unit may be implemented by using a PWM generator chip, may generate a PWM control signal by comparing a sine wave with a comparator, or may generate a PWM control signal by using a single-chip MCU, which may be selected according to a specific scenario, and is not limited herein. In an example, the control module 13 may be implemented by a single-chip microcomputer MCU, and at this time, the PWM unit 131 may be implemented by the single-chip microcomputer MCU through a pin to output a high-low level signal, so as to achieve an effect of outputting a PWM control signal.
In an embodiment, the control module 13 may include a current comparison unit. With continued reference to fig. 3, the current comparing unit 132 is electrically connected to the current sampling module 11 and the IPM module 12, respectively, and is configured to compare the current of the motor 20 with a preset first current threshold, output a first protection signal to the IPM module 12 when the current exceeds the first current threshold, and output no signal when the current is smaller than the first current threshold. Thus, the embodiment can avoid overcurrent of the motor 20 by setting the first current threshold, and prolong the service life. In an example, when the control module 13 is implemented by a single-chip MCU, the current comparing unit 132 may be implemented by an ADC circuit and an internal comparator inside the MCU.
It should be noted that the first current threshold is used for protecting the motor 20, and therefore, the first current threshold may be set in a manner of referring to the rated power or the maximum power of the motor 20. Taking the maximum power as an example, the first current threshold is less than or equal to the maximum power of the motor 20, so that the first protection signal is output when the current is greater than or equal to the first current threshold, so that the IPM module 12 stops outputting the voltage and the current, and the effect of protecting the motor is achieved. It can be understood that, in the embodiment, the motor control system can be adapted to various motors by setting the first current threshold, which is beneficial to improving the application range of the motor control system; or, from the design and production perspective, when the application range of the motor control system is expanded, a motor control system does not need to be designed for each motor, so that the design and development difficulty is reduced; moreover, when the application range of the motor control system is expanded, the difficulty of producing one type of motor control system is far lower than that of producing multiple types of motor control systems, so that the production difficulty is reduced; in addition, from a use perspective, the complexity of a user using one type of motor control system is much lower than the complexity of producing multiple types of motor control systems, reducing learning and maintenance costs.
When the control module 13 is implemented by a single-chip microcomputer MCU, the configuration of the first current threshold may be implemented by a software configuration mode. For example, an air conditioner may include an interaction module. With continued reference to fig. 1, the interface module 30 may be electrically connected to the control module 13. The user may operate the above-described interaction module, such as clicking, sliding, writing, and the like. The interaction module 30 may detect the above-described operation of the user and receive the input first current threshold, and then output the first current threshold to the control module 13. The control module 13 may store the first current threshold to a designated location (e.g., a local memory, or a cloud). When the first current threshold needs to be used, the control module 13 may directly read the first current threshold from a designated position. Therefore, the embodiment can allow the configuration of the first current threshold, and can be suitable for a scene that a motor control system is adapted to different motors, so as to achieve the purpose of avoiding the motor from being incapable of being protected due to the fact that the IPM module is too large.
In one embodiment, with continued reference to fig. 1, the air conditioner further includes a current protection module 14. The current protection module 14 may include a voltage divider circuit and a comparator circuit. With continued reference to fig. 2, the voltage divider circuit is used to configure the first current threshold and may include a resistor R1, a resistor R2, and a voltage divider VCC. The voltage dividing power supply VCC, the resistor R1 and the resistor R2 form a voltage dividing circuit. The output voltage of the voltage divider circuit may be used as a reference voltage and corresponds to a first current threshold for protecting the IPM module 12. In practice, the resistor R2 may be implemented by using a sliding resistor, and by adjusting different resistors, the voltage division on the resistor R2 can be adjusted, and finally the effect of adjusting the first current threshold is achieved. The comparator circuit may be implemented using a comparator formed by an operational amplifier. A first end of the comparator circuit is electrically connected to the voltage divider circuit, and is specifically connected to a serial connection point of the resistor R1 and the resistor R2, a second end of the comparator circuit receives a current of the motor 20, and an output end of the comparator circuit is electrically connected to the IPM module 12.
The working principle of the current protection module 14 is as follows: the comparator circuit receives the sampling current (which may also be understood as a sampling voltage) output by the current sampling module 11 and compares the sampling current with a reference voltage corresponding to the voltage dividing circuit to determine the magnitudes of the sampling voltage and the reference voltage, so as to determine the magnitudes of the current and the first current threshold. When the current is greater than or equal to the first current threshold, the comparator circuit may output a first protection signal to the IPM module, so that the IPM module stops outputting the voltage and the current, thereby controlling the motor 20 to stop working. When the current is less than the first current threshold, the comparator circuit does not need to output a protection signal, and the IPM module may maintain the current output state, so that the motor 20 operates normally.
Therefore, the IPM module can be protected by configuring the first current threshold value in the embodiment, so that the motor control system is suitable for different IPM modules, and the production difficulty and the dimension difficulty of the motor control system are favorably reduced.
In an embodiment, the control module may further include an interrupt unit. With continued reference to fig. 3, the interrupt unit 133 is electrically connected to the current protection module 14 and the IPM module 12, respectively, for generating an interrupt signal upon receiving the first protection signal and outputting the interrupt signal to the IPM module 12. In an example, when the control module 13 is implemented by a MCU, the interrupt unit 133 may be implemented by an application program, and the interrupt unit 133 may obtain a signal of an interrupt pin of the MCU, and may send an interrupt signal to the IPM module through the control pin when detecting the first protection signal, so that the IPM module 12 stops outputting the voltage and the current. Therefore, the IPM module can be protected on the basis of the current protection module by arranging the interrupt unit, the effect of software and hardware dual protection is achieved, and the protection accuracy is improved.
The operation of the air conditioner is described below based on the air conditioner shown in fig. 2:
when the air conditioner needs to be used, a user can trigger a switch button of the air conditioner. The control module 13 of the air conditioner may control the PWM unit 131 to output a PWM control signal to the IPM module 12 after detecting that the switch button is triggered. The IPM module 12 turns on or off the 6 switching devices SW1 to SW6 shown in fig. 2 according to a PWM control signal at a certain timing, so as to sequentially supply power to the three UVW phase circuits of the motor 20, and the motor 20 can drive the compressor, the fan, and the like to operate, thereby achieving the effects of supplying hot air, cold air, or natural air, and the like.
During the operation of the motor 20 and the IPM module 12 of the air conditioner, the current sampling module 11 may collect the current of the motor 20 and output the current to the control module 13 and the current protection module 14.
The current comparing unit 132 in the control module 13 may obtain a preset second current threshold and the present current, and compare the second current threshold and the present current. When the present current is greater than or equal to the second current, the current comparing unit 132 may output a first protection signal to the IPM module 12 to cause the IPM module 12 to control the operation of the motor 20 to be stopped. When the present current is greater than or equal to the second current, the current comparing unit 132 does not need to output the signal, and the IPM module 12 may continue to control the operation of the motor 20.
The current protection module 14 receives the present current and compares the present current with the first current threshold to determine the magnitude of the present current and the first current threshold. When the current is greater than or equal to the first current threshold, the current protection module 14 may output a first protection signal to the IPM module, so that the IPM module stops outputting the voltage and the current, thereby controlling the motor 20 to stop working. When the present current is less than the first current threshold, the current protection module 14 does not need to output a protection signal, and the IPM module may maintain the present output state, so that the motor 20 operates normally.
When the control module 13 detects a shutdown signal or a shutdown signal, the control module 13 may output the shutdown control signal or the shutdown control signal, so that the IPM module 12 controls the motor 20 to stop working.
On the basis of the air conditioner provided by the embodiment of the disclosure, the embodiment of the disclosure also provides an air conditioner control method, wherein the air conditioner comprises a motor control system and a motor; the motor control system comprises a current sampling module, an IPM module, a control module and a current protection module; referring to fig. 4, the method includes steps 41 to 43:
in step 41, the current sampling module collects the current of the motor and outputs the current to the current protection module and the control module;
in step 42, the current protection module compares a current of the electric machine with a preset first current threshold, and outputs a first protection signal to the IPM module when the current exceeds the first current threshold, so as to stop the IPM module;
in step 43, the control module compares the current with a preset second current threshold and outputs a second protection signal to the IPM module when the current exceeds the second current threshold, so as to stop the IPM module; the second current threshold is used for protecting the motor and is less than or equal to the first current threshold.
In one embodiment, the control module comprises a PWM unit electrically connected to the IPM module; the method further comprises the following steps:
the PWM unit generates a PWM control signal and outputs the PWM control signal to the IPM module.
In one embodiment, the control module includes a current comparison unit; the current comparison unit is electrically connected with the current sampling module and the IPM module respectively; the method further comprises the following steps:
the current comparison unit compares the current of the motor with a preset first current threshold value, and outputs a first protection signal to the IPM module when the current exceeds the first current threshold value.
In one embodiment, the control module includes an interrupt unit; the interrupt unit is electrically connected with the current protection module and the IPM module respectively; the method further comprises the following steps:
the interrupt unit generates an interrupt signal when receiving the first protection signal, and outputs the interrupt signal to the IPM module.
In one embodiment, the system further comprises an interaction module; the interaction module is electrically connected with the control module; the method further comprises the following steps:
the interaction module configures the second current threshold in response to an input operation by a user.
An embodiment of the present disclosure further provides an air conditioner, including:
a processor;
a memory for storing a computer program executable by the processor;
wherein the processor is configured to execute the computer program in the memory to implement the method of FIG. 4.
Embodiments of the present disclosure also provide a computer-readable storage medium, in which an executable computer program can implement the method of fig. 4 when executed by a processor.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (14)

1. An air conditioner is characterized by comprising a motor control system and a motor; the motor control system comprises a current sampling module, an IPM module, a control module and a current protection module;
the current sampling module is used for collecting the current of the motor and outputting the current to the current protection module and the control module;
the current protection module is used for comparing the current of the motor with a preset first current threshold value and outputting a first protection signal to the IPM module when the current exceeds the first current threshold value so as to stop the IPM module;
the control module is used for comparing the current with a preset second current threshold value and outputting a second protection signal to the IPM module when the current exceeds the second current threshold value so as to stop the IPM module; the second current threshold is used for protecting the motor and is less than or equal to the first current threshold.
2. The air conditioner of claim 1, wherein the control module comprises a PWM unit electrically connected to the IPM module for generating and outputting a PWM control signal to the IPM module.
3. The air conditioner of claim 1, wherein the control module comprises a current comparison unit; the current comparison unit is electrically connected with the current sampling module and the IPM module respectively, and is used for comparing the current of the motor with a preset first current threshold value and outputting a first protection signal to the IPM module when the current exceeds the first current threshold value.
4. The air conditioner according to claim 1, wherein the control module includes an interrupt unit; the interrupt unit is electrically connected with the current protection module and the IPM module respectively, and is used for generating an interrupt signal when receiving the first protection signal and outputting the interrupt signal to the IPM module.
5. The air conditioner of claim 1, wherein the current sampling module comprises a sampling resistor and a first operational amplifier circuit; the sampling resistor is connected between the IPM module and a power supply in series; the first operational amplifier circuit is used for converting the voltage corresponding to the sampling resistor into the current of the motor.
6. The air conditioner of claim 1, wherein the current protection module comprises a voltage divider circuit and a comparator circuit; the voltage division circuit is used for configuring the first current threshold; the comparator circuit comprises a first end, a second end and an output end; the first end is electrically connected with the current sampling module, the second end is electrically connected with the voltage dividing circuit, and the output end is electrically connected with the IPM module.
7. The air conditioner of claim 1, further comprising an interaction module; the interaction module is electrically connected with the control module and is used for responding to the input operation of a user to configure the second current threshold value.
8. The air conditioner control method is characterized in that the air conditioner comprises a motor control system and a motor; the motor control system comprises a current sampling module, an IPM module, a control module and a current protection module; the method comprises the following steps:
the current sampling module collects the current of the motor and outputs the current to the current protection module and the control module;
the current protection module compares the current of the motor with a preset first current threshold value, and outputs a first protection signal to the IPM module when the current exceeds the first current threshold value so as to stop the IPM module;
the control module compares the current with a preset second current threshold value, and outputs a second protection signal to the IPM module when the current exceeds the second current threshold value so as to stop the IPM module; the second current threshold is used for protecting the motor and is less than or equal to the first current threshold.
9. The method of claim 8, wherein the control module comprises a PWM unit electrically connected to the IPM module; the method further comprises the following steps:
the PWM unit generates a PWM control signal and outputs the PWM control signal to the IPM module.
10. The method of claim 8, wherein the control module comprises a current comparison unit; the current comparison unit is electrically connected with the current sampling module and the IPM module respectively; the method further comprises the following steps:
the current comparison unit compares the current of the motor with a preset first current threshold value, and outputs a first protection signal to the IPM module when the current exceeds the first current threshold value.
11. The method of claim 8, wherein the control module comprises an interrupt unit; the interrupt unit is electrically connected with the current protection module and the IPM module respectively; the method further comprises the following steps:
the interrupt unit generates an interrupt signal when receiving the first protection signal, and outputs the interrupt signal to the IPM module.
12. The method of claim 8, further comprising an interaction module; the interaction module is electrically connected with the control module; the method further comprises the following steps:
the interaction module configures the second current threshold in response to an input operation by a user.
13. An air conditioner, comprising:
a processor;
a memory for storing a computer program executable by the processor;
wherein the processor is configured to execute the computer program in the memory to implement the method of any of claims 8 to 12.
14. A computer-readable storage medium, characterized in that an executable computer program in the storage medium, when executed by a processor, is capable of implementing the method according to any one of claims 8 to 12.
CN202111272141.5A 2021-10-29 2021-10-29 Air conditioner, control method thereof, and computer-readable storage medium Pending CN113983664A (en)

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Application publication date: 20220128