CN107101345B - Air conditioner, compressor stop control method thereof and computer readable storage medium - Google Patents
Air conditioner, compressor stop control method thereof and computer readable storage medium Download PDFInfo
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- CN107101345B CN107101345B CN201710415841.2A CN201710415841A CN107101345B CN 107101345 B CN107101345 B CN 107101345B CN 201710415841 A CN201710415841 A CN 201710415841A CN 107101345 B CN107101345 B CN 107101345B
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F24F2110/00—Control inputs relating to air properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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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
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Abstract
The invention discloses a method for controlling the shutdown of an air conditioner compressor, which comprises the following steps: starting a rotor position sensor to determine a rotor phase with minimum stress of the compressor; starting a rotor position sensor to acquire the position of a rotor of the compressor after receiving a compressor stop instruction; and when the rotor position of the compressor is in the rotor phase with the minimum stress, controlling the compressor to stop running. The invention also discloses an air conditioner and a computer readable storage medium. The invention ensures that the rotor positions of the compressor are close when the compressor is stopped every time, the vibration stress is consistent when the compressor is stopped, the stability of the compressor is ensured, and the service life of the compressor is prolonged.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to an air conditioner, a compressor shutdown control method thereof and a computer readable storage medium.
Background
In the inverter air conditioning system, a refrigerant compression cycle of the inverter compressor includes: the low-temperature and low-pressure refrigerant enters the air suction pipe of the compressor from the condenser, is gradually compressed into a high-temperature and high-pressure refrigerant, and is then quickly released to the evaporator through the air outlet of the compressor. At different stages of the refrigerant compression cycle (different phases of the compressor operation), the refrigerant pressure is different. At present, when the variable frequency air conditioner is shut down, the shutdown of the compressor rotor at any phase causes inconsistent vibration stress generated by the shutdown of the compressor at each time, the stability of the compressor can be damaged, and the service life of the compressor is shortened.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide an air conditioner, a compressor shutdown control method and a computer readable storage medium thereof, and aims to solve the technical problems that when the existing variable frequency air conditioner is shut down, the shutdown of a compressor rotor at any phase causes inconsistent vibration stress generated by each shutdown of the compressor, the stability of the compressor is damaged, and the service life of the compressor is shortened.
In order to achieve the above object, the present invention provides a method for controlling shutdown of an air conditioner compressor, comprising the steps of:
starting a rotor position sensor to determine a rotor phase with minimum stress of the compressor;
starting a rotor position sensor to acquire the position of a rotor of the compressor after receiving a compressor stop instruction;
and when the rotor position of the compressor is in the rotor phase with the minimum stress, controlling the compressor to stop running.
Preferably, the step of activating the rotor position sensor to determine the rotor phase at which the stress of the compressor is minimal comprises:
starting a rotor position sensor, stopping the compressor after controlling the compressor to operate to each phase of the compressor rotor, and detecting a corresponding stress value when the compressor operates to each phase and stops;
and determining the rotor phase with the minimum stress value of the compressor rotor according to each phase of the compressor rotor and the corresponding detected stress value.
Preferably, after the rotor position sensor is enabled to acquire the rotor position of the compressor after the compressor stop instruction is received, the method further includes:
and when the rotor position of the compressor is not in the rotor phase with the minimum stress, controlling the compressor to operate at the current frequency.
Preferably, when the rotor position of the compressor is in the stress minimum rotor phase, before controlling the compressor to stop operating, the method further includes:
judging whether the rotor position of the compressor is consistent with the rotor phase with the minimum stress;
when the rotor position of the compressor is consistent with the rotor phase with the minimum stress, determining that the rotor position of the compressor is in the rotor phase with the minimum stress;
and when the rotor position of the compressor is inconsistent with the rotor phase with the minimum stress, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress.
Preferably, when the rotor position of the compressor is in the stress minimum rotor phase, before controlling the compressor to stop operating, the method further includes:
calculating a phase difference between a rotor position of the compressor and the rotor phase at which the stress is minimum;
when the phase difference is smaller than a first preset phase deviation threshold value, determining that the rotor position of the compressor is in the rotor phase with the minimum stress;
and when the phase difference is larger than or equal to a first preset phase deviation threshold value, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress.
Preferably, after controlling the compressor to stop operating when the rotor position of the compressor is in the rotor phase with the minimum stress, the method further includes:
controlling the compressor to operate;
when a compressor stop instruction is received, starting a rotor position sensor to acquire the current rotor position of the compressor and acquiring the rotor position of the last compressor stop;
calculating the difference value between the current rotor position and the rotor position when the compressor is stopped last time;
when the difference value is smaller than a second preset phase deviation threshold value, determining that the rotor position of the compressor is in the rotor phase with the minimum stress;
when the difference is larger than or equal to a second preset phase deviation threshold value, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress;
the second preset phase deviation threshold is smaller than the first preset phase deviation threshold, and when the difference value is smaller than the second preset phase deviation threshold, the difference value between the current rotor position and the rotor phase with the minimum profit is smaller than the first preset phase deviation threshold.
Preferably, after the step of controlling the compressor to operate at the current frequency when the rotor position of the compressor is not in the stress minimum rotor phase, the method further includes:
and starting a rotor position sensor to detect the position of the rotor of the compressor at preset intervals, stopping detecting the position of the rotor of the compressor until the position of the rotor of the compressor is in the rotor phase with the minimum stress, and controlling the compressor to stop.
Preferably, after the step of controlling the compressor to stop operating when the rotor position of the compressor is in the rotor phase with the minimum stress, the method further includes:
storing the rotor position of the compressor at the rotor phase with the minimum stress, and recording the stored rotor position of the compressor as the rotor phase with the minimum stress when the compressor is stopped next time; and controlling the compressor to stop when the rotor position of the compressor is in the recorded rotor phase when the compressor stop command is received next time.
Further, to achieve the above object, the present invention also provides an air conditioner including: the air conditioner compressor stop control method comprises the steps of a memory, a processor and an air conditioner compressor stop control program stored on the memory and capable of running on the processor, wherein the steps of the air conditioner compressor stop control method are realized when the air conditioner compressor stop control program is executed by the processor.
Further, to achieve the above object, the present invention also provides a computer readable storage medium having stored thereon an air conditioner compressor shutdown control program which, when executed by a processor, implements the steps of the air conditioner compressor shutdown control method as described above.
The invention determines the rotor phase with the minimum stress of the compressor, controls the rotor position of each compressor stop according to the determined rotor phase, and stops the compressor when the rotor position of the compressor is in the rotor phase, thereby ensuring that the rotor position of each compressor stop is close and the vibration stress is consistent, ensuring the stability of the compressor and prolonging the service life of the compressor.
Drawings
FIG. 1 is a schematic diagram of a terminal \ device structure of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a first embodiment of a method for controlling shutdown of an air conditioner compressor according to the present invention;
FIG. 3 is a schematic flow chart illustrating a second embodiment of a method for controlling shutdown of an air conditioner compressor according to the present invention;
FIG. 4 is a schematic diagram illustrating a refrigerant pressure of the compressor according to an embodiment of the present invention;
FIG. 5 is a graph illustrating the stress at shutdown of the compressor according to an embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: starting a rotor position sensor to determine a rotor phase with minimum stress of the compressor; starting a rotor position sensor to acquire the position of a rotor of the compressor after receiving a compressor stop instruction; and when the rotor position of the compressor is in the rotor phase with the minimum stress, controlling the compressor to stop running.
Because there is the frequency conversion air conditioner when shutting down in prior art, shutting down at the arbitrary phase place of compressor rotor will cause the compressor to shut down the vibration stress that produces inconsistent at every turn, can harm the stability of compressor, shorten the technical problem of compressor life-span.
Therefore, the invention provides a solution, by determining the rotor phase with the minimum stress of the compressor, controlling the rotor position of each compressor stop according to the determined rotor phase, stopping the compressor when the rotor position of the compressor is in the rotor phase, ensuring that the rotor position of each compressor stop is close and the vibration stress is consistent, ensuring the stability of the compressor and prolonging the service life of the compressor.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention can be a PC, and can also be a mobile terminal device with a display function, such as a smart phone, a tablet computer, an electronic book reader, an MP3(Moving Picture Experts Group Audio Layer III, dynamic video Experts compress standard Audio Layer 3) player, an MP4(Moving Picture Experts Group Audio Layer IV, dynamic video Experts compress standard Audio Layer 3) player, a portable computer, and the like.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the terminal may further include a camera, a Radio Frequency (RF) circuit, a sensor, an audio circuit, a WiFi module, and the like. Such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display screen according to the brightness of ambient light, and a proximity sensor that may turn off the display screen and/or the backlight when the mobile terminal is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), detect the magnitude and direction of gravity when the mobile terminal is stationary, and can be used for applications (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration), vibration recognition related functions (such as pedometer and tapping) and the like for recognizing the attitude of the mobile terminal; of course, the mobile terminal may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and a holman sensor, which are not described herein again.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, the memory 1005, which is one type of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and an air conditioner compressor shutdown control application program.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to invoke the air conditioner compressor shutdown control application stored in the memory 1005 and perform the following operations:
starting a rotor position sensor to determine a rotor phase with minimum stress of the compressor;
starting a rotor position sensor to acquire the position of a rotor of the compressor after receiving a compressor stop instruction;
and when the rotor position of the compressor is in the rotor phase with the minimum stress, controlling the compressor to stop running.
Further, the processor 1001 may call the air conditioner compressor stop control application stored in the memory 1005, and also perform the following operations:
starting a rotor position sensor, stopping the compressor after controlling the compressor to operate to each phase of the compressor rotor, and detecting a corresponding stress value when the compressor operates to each phase and stops;
and determining the rotor phase with the minimum stress value of the compressor rotor according to each phase of the compressor rotor and the corresponding detected stress value.
Further, the processor 1001 may call the air conditioner compressor stop control application stored in the memory 1005, and also perform the following operations:
and when the rotor position of the compressor is not in the rotor phase with the minimum stress, controlling the compressor to operate at the current frequency.
Further, the processor 1001 may call the air conditioner compressor stop control application stored in the memory 1005, and also perform the following operations:
judging whether the rotor position of the compressor is consistent with the rotor phase with the minimum stress;
when the rotor position of the compressor is consistent with the rotor phase with the minimum stress, determining that the rotor position of the compressor is in the rotor phase with the minimum stress;
and when the rotor position of the compressor is inconsistent with the rotor phase with the minimum stress, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress.
Further, the processor 1001 may call the air conditioner compressor stop control application stored in the memory 1005, and also perform the following operations:
calculating a phase difference between a rotor position of the compressor and the rotor phase at which the stress is minimum;
when the phase difference is smaller than a first preset phase deviation threshold value, determining that the rotor position of the compressor is in the rotor phase with the minimum stress;
and when the phase difference is larger than or equal to a first preset phase deviation threshold value, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress.
Further, the processor 1001 may call the air conditioner compressor stop control application stored in the memory 1005, and also perform the following operations:
controlling the compressor to operate;
when a compressor stop instruction is received, starting a rotor position sensor to acquire the current rotor position of the compressor and acquiring the rotor position of the last compressor stop;
calculating the difference value between the current rotor position and the rotor position when the compressor is stopped last time;
when the difference value is smaller than a second preset phase deviation threshold value, determining that the rotor position of the compressor is in the rotor phase with the minimum stress;
when the difference is larger than or equal to a second preset phase deviation threshold value, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress;
the second preset phase deviation threshold is smaller than the first preset phase deviation threshold, and when the difference value is smaller than the second preset phase deviation threshold, the difference value between the current rotor position and the rotor phase with the minimum profit is smaller than the first preset phase deviation threshold.
Further, the processor 1001 may call the air conditioner compressor stop control application stored in the memory 1005, and also perform the following operations:
and starting a rotor position sensor to detect the position of the rotor of the compressor at preset intervals, stopping detecting the position of the rotor of the compressor until the position of the rotor of the compressor is in the rotor phase with the minimum stress, and controlling the compressor to stop.
Further, the processor 1001 may call the air conditioner compressor stop control application stored in the memory 1005, and also perform the following operations:
storing the rotor position of the compressor at the rotor phase with the minimum stress, and recording the stored rotor position of the compressor as the rotor phase with the minimum stress when the compressor is stopped next time; and controlling the compressor to stop when the rotor position of the compressor is in the recorded rotor phase when the compressor stop command is received next time.
Referring to fig. 2, a first embodiment of the present invention provides an air conditioner compressor stop control method including:
step S10, starting a rotor position sensor to determine the rotor phase with the minimum stress of the compressor;
in an embodiment of the present invention, a rotor position sensor is disposed in the outdoor unit of the air conditioner, and the rotor position sensor may be a hall position sensor, a resolver, or the like, and is used to detect a phase of the compressor rotor, where the rotor phase is an angle of rotation of the compressor rotor, that is, a rotor position of the compressor. After a compressor of the air conditioner is started or after the rotor phase with the minimum stress of the compressor needs to be determined, the rotor position sensor is started to determine the rotor phase with the minimum stress of the compressor. The compressor stress is compressor piping stress.
According to an embodiment of the present invention, the rotor position where the stress of the compressor is the minimum is the position where the load is the minimum, and the position where the load is the minimum is: the rotor phase with the minimum compressor load is the rotor position of the compressor at the end of one air suction and exhaust, namely the rotor position of the compressor at the end of the exhaust in one mechanical cycle, and the rotor phase is detected by a rotor position sensor at the end of the exhaust in one mechanical cycle and marked as the rotor phase with the minimum compressor stress.
In a refrigerant compression cycle of the compressor, a low-temperature and low-pressure refrigerant enters the suction pipe of the compressor from the condenser, is gradually compressed into a high-temperature and high-pressure refrigerant, is rapidly released to the evaporator after being exhausted by the compressor, and the load pressure of the compressor reaches the minimum after the refrigerant is released. Therefore, the rotor phase with the minimum compressor load is the rotor phase of the compressor after the refrigerant is released, that is, at the end of the exhaust, and the rotor phase with the minimum stress is detected by the rotor position sensor.
According to an embodiment of the present invention, the rotor phase at which the load of the compressor is minimum may be obtained by obtaining a minimum value of a magnitude of a torque current of the compressor or by obtaining a minimum value of a magnitude of a torque compensation of the compressor. It should be appreciated that when the compressor is operated near the rotor phase where the load is at a minimum, the corresponding torque current magnitude should also be small. Therefore, in the case where the rotational speed control is smooth, if the magnitude of the torque current of the compressor is minimum, the rotor of the compressor is considered to be in the rotor phase in which the load is minimum, and at this time, the rotor phase in which the stress is minimum is detected by the rotor position sensor.
According to one embodiment of the invention, the step of enabling the rotor position sensor to determine the rotor phase at which the compressor stress is minimal comprises: starting a rotor position sensor, controlling the compressor rotor to stop after running to each phase of the compressor rotor, namely controlling the compressor rotor to stop after rotating for each angle, and detecting the corresponding stress value when the running compressor at each phase stops; and determining the rotor phase with the minimum stress value of the compressor rotor according to each phase of the compressor rotor and the corresponding detected stress value. The method comprises the steps of detecting each phase of a compressor rotor through a rotor position sensor to carry out shutdown operation, measuring the stress value of the compressor, and determining a rotor phase corresponding to the minimum stress value according to the stress value measured in each phase, wherein the rotor phase is the rotor phase with the minimum stress. The rotor phase with the minimum stress in the embodiment is detected by a rotor position sensor of hardware, and is not calculated according to software, and the given rotor phase is the position to which the real rotor runs.
Step S20, after receiving a compressor stop instruction, starting a rotor position sensor to acquire the rotor position of the compressor;
in the running process of the air conditioner, a compressor stopping instruction is received, and after the compressor stopping instruction is received, a rotor position sensor is started to obtain the position of a rotor of the compressor. Activation as used herein does not mean turning on, but may be idle after turning on, but when necessary, activates a rotor sensor to detect rotor position. The rotor position in this embodiment is detected by a rotor position sensor of hardware after receiving a compressor stop instruction, and the detected rotor position is a rotor rotation angle (rotor phase) of the compressor.
And step S30, controlling the compressor to stop running when the rotor position of the compressor is in the rotor phase with the minimum stress.
The process of determining that the rotor position of the compressor is in the rotor phase in which the stress is minimum includes: 1) judging whether the rotor position of the compressor is consistent with the rotor phase with the minimum stress; when the rotor position of the compressor is consistent with the rotor phase with the minimum stress, determining that the rotor position of the compressor is in the rotor phase with the minimum stress; and when the rotor position of the compressor is inconsistent with the rotor phase with the minimum stress, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress. 2) Calculating a phase difference between a rotor position of the compressor and the rotor phase at which the stress is minimum; when the phase difference is smaller than a first preset phase deviation threshold value, determining that the rotor position of the compressor is in the rotor phase with the minimum stress; and when the phase difference is larger than or equal to a first preset phase deviation threshold value, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress. 3) The rotor phase with the minimum stress is a phase interval, and when the rotor position falls into the phase interval, the rotor position of the compressor is judged to be in the rotor phase with the minimum stress; when the rotor position is outside the phase zone, it is determined that the rotor position of the compressor is not in the rotor phase in which the stress is minimum.
Further, according to an embodiment of the present invention, when the rotor position of the compressor is not in the stress-minimum rotor phase, the compressor is controlled to operate at the current frequency, or the compressor receives a control command and operates according to a parameter corresponding to the control command.
That is, the compressor is stopped at the rotor phase where the stress of the compressor is minimum. Specifically, after the air conditioner receives a compressor stop signal and a controller of the air conditioner sends the compressor stop signal, the controller starts to control the compressor to stop, the position of a rotor of the compressor is obtained in the stop process of the air conditioner, namely the compressor, and if the rotor of the compressor is in the rotor phase with the minimum stress, the compressor is controlled to stop running immediately; otherwise, if the rotor of the compressor is not in the rotor phase with the minimum stress, controlling the compressor to continuously run at the current frequency; and controlling the compressor to stop until the rotor of the compressor is in the rotor phase with the minimum stress of the compressor, namely starting a rotor position sensor to detect the position of the rotor of the compressor at a preset time interval when the rotor of the compressor is not in the rotor phase with the minimum stress, stopping detecting the position of the rotor of the compressor until the rotor of the compressor is in the rotor phase with the minimum stress, and controlling the compressor to stop.
In an embodiment of the present invention, in order to further reduce the stress when the compressor is stopped, the stability of the compressor is improved. When the rotor of the compressor is not in the rotor phase with the minimum stress, calculating the phase difference between the current rotor position of the compressor and the rotor phase with the minimum stress, and when the phase difference is smaller than a preset value, reducing the frequency of the compressor, wherein the frequency can be gradually reduced according to a set step length, or gradually reduced according to set step lengths corresponding to different phase differences until the frequency of the compressor reaches a minimum threshold value, or the compressor is stopped. The preset values and the minimum threshold are set according to requirements and compressor performance.
In the embodiment, the compressor stop control is realized by determining the rotor phase with the minimum stress of the compressor, controlling the rotor position of the compressor when the compressor is stopped every time according to the determined rotor phase, stopping the compressor when the rotor position of the compressor is in the rotor phase, ensuring that the rotor position of the compressor when the compressor is stopped every time is close, ensuring the consistency of the vibration stress of the compressor when the compressor is stopped, ensuring the stability of the compressor and prolonging the service life of the compressor.
Further, referring to fig. 3, a second embodiment of the present invention provides a method for controlling a shutdown of a compressor of an air conditioner, based on the embodiment shown in fig. 2, after controlling the compressor to stop operating when the rotor position of the compressor is in the rotor phase with the minimum stress, the method further includes:
step S40, controlling the compressor to run;
step S50, when a compressor stop instruction is received, a rotor position sensor is started to obtain the current rotor position of the compressor, and the rotor position of the last compressor stop is obtained;
step S60, calculating the difference between the current rotor position and the rotor position when the compressor is stopped last time;
step S70, when the difference is smaller than a second preset phase deviation threshold, determining that the rotor position of the compressor is in the rotor phase with the minimum stress;
step S80, when the difference is larger than or equal to a second preset phase deviation threshold value, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress;
the second preset phase deviation threshold is smaller than the first preset phase deviation threshold, and when the difference value is smaller than the second preset phase deviation threshold, the difference value between the current rotor position and the rotor phase with the minimum profit is smaller than the first preset phase deviation threshold.
The present embodiment differs from the above-described embodiments in that the rotor position at the last shutdown is taken as the phase value with the lowest stress at each shutdown, and a corresponding phase deviation threshold is set, except that the set phase deviation threshold is more accurate than the deviation from the initially determined rotor phase, and the allowable deviation is smaller, i.e. it is ensured that the set allowable range of the initially determined rotor phase with the lowest stress is also achieved by different reference manners of the rotor position. After the compressor is controlled to stop according to the rotor phase with the minimum stress, storing the rotor position of the compressor at the rotor phase with the minimum stress, and recording the stored rotor position of the compressor as the rotor phase with the minimum stress when the compressor is stopped next time; and controlling the compressor to stop when the rotor position of the compressor is in the recorded rotor phase when the compressor stop command is received next time.
Specifically, for better describing the embodiment of the present invention, refer to fig. 4 and 5, where fig. 4 shows refrigerant pressures (gas resisting moments) of different rotor phases when a certain compressor operates at 80Hz under a certain working condition, and courseware shows that the refrigerant pressures corresponding to different rotor phases are different and change periodically; fig. 5 is a stress relationship curve of a compressor at a shutdown time for different rotor phases of the compressor, and it can be seen that the stresses generated by stopping the compressor at different rotor phases are different. By the scheme of the embodiment of the invention, the rotors of the compressor are close in position and same in stress when the compressor is stopped every time, large deviation cannot occur, the stability of the compressor is ensured, and the service life of the compressor is further prolonged.
In one embodiment, an air conditioner is provided, the air conditioner including: a memory, a processor, and an air conditioner compressor shutdown control program stored on the memory and operable on the processor, the air conditioner compressor shutdown control program when executed by the processor performs the following operations:
starting a rotor position sensor to determine a rotor phase with minimum stress of the compressor; starting a rotor position sensor to acquire the position of a rotor of the compressor after receiving a compressor stop instruction; and when the rotor position of the compressor is in the rotor phase with the minimum stress, controlling the compressor to stop running.
In an embodiment of the present invention, a rotor position sensor is disposed in the outdoor unit of the air conditioner, and the rotor position sensor may be a hall position sensor, a resolver, or the like, and is used to detect the phase of the compressor rotor. After a compressor of the air conditioner is started or after the rotor phase with the minimum stress of the compressor needs to be determined, the rotor position sensor is started to determine the rotor phase with the minimum stress of the compressor.
According to an embodiment of the present invention, the rotor position where the stress of the compressor is the minimum is the position where the load is the minimum, and the position where the load is the minimum is: the rotor phase with the minimum compressor load is the rotor position of the compressor at the end of one air suction and exhaust, namely the rotor position of the compressor at the end of the exhaust in one mechanical cycle, and the rotor phase is detected by a rotor position sensor at the end of the exhaust in one mechanical cycle and marked as the rotor phase with the minimum compressor stress.
In a refrigerant compression cycle of the compressor, a low-temperature and low-pressure refrigerant enters the suction pipe of the compressor from the condenser, is gradually compressed into a high-temperature and high-pressure refrigerant, is rapidly released to the evaporator after being exhausted by the compressor, and the load pressure of the compressor reaches the minimum after the refrigerant is released. Therefore, the rotor phase with the minimum compressor load is the rotor phase of the compressor after the refrigerant is released, that is, at the end of the exhaust, and the rotor phase with the minimum stress is detected by the rotor position sensor.
According to an embodiment of the present invention, the rotor phase at which the load of the compressor is minimum may be obtained by obtaining a minimum value of a magnitude of a torque current of the compressor or by obtaining a minimum value of a magnitude of a torque compensation of the compressor. It should be appreciated that when the compressor is operated near the rotor phase where the load is at a minimum, the corresponding torque current magnitude should also be small. Therefore, in the case where the rotational speed control is smooth, if the magnitude of the torque current of the compressor is minimum, the rotor of the compressor is considered to be in the rotor phase in which the load is minimum, and at this time, the rotor phase in which the stress is minimum is detected by the rotor position sensor.
According to one embodiment of the invention, the step of enabling the rotor position sensor to determine the rotor phase at which the compressor stress is minimal comprises: starting a rotor position sensor, stopping the compressor after controlling the compressor to operate to each phase of the compressor rotor, and detecting a corresponding stress value when the compressor operates to each phase and stops; and determining the rotor phase with the minimum stress value of the compressor rotor according to each phase of the compressor rotor and the corresponding detected stress value. The method comprises the steps of detecting each phase of a compressor rotor through a rotor position sensor to carry out shutdown operation, measuring the stress value of the compressor, and determining a rotor phase corresponding to the minimum stress value according to the stress value measured in each phase, wherein the rotor phase is the rotor phase with the minimum stress. The rotor phase with the minimum stress in the embodiment is detected by a rotor position sensor of hardware, and is not calculated according to software, and the given rotor phase is the position to which the real rotor runs.
In the running process of the air conditioner, a compressor stopping instruction is received, and after the compressor stopping instruction is received, a rotor position sensor is started to obtain the position of a rotor of the compressor. Activation as used herein does not mean turning on, but may be idle after turning on, but when necessary, activates a rotor sensor to detect rotor position. The rotor position in this embodiment is detected by a rotor position sensor of hardware after receiving a compressor stop instruction.
The process of determining that the rotor position of the compressor is in the rotor phase in which the stress is minimum includes: 1) judging whether the rotor position of the compressor is consistent with the rotor phase with the minimum stress; when the rotor position of the compressor is consistent with the rotor phase with the minimum stress, determining that the rotor position of the compressor is in the rotor phase with the minimum stress; and when the rotor position of the compressor is inconsistent with the rotor phase with the minimum stress, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress. 2) Calculating a phase difference between a rotor position of the compressor and the rotor phase at which the stress is minimum; when the phase difference is smaller than a first preset phase deviation threshold value, determining that the rotor position of the compressor is in the rotor phase with the minimum stress; and when the phase difference is larger than or equal to a first preset phase deviation threshold value, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress. 3) The rotor phase with the minimum stress is a phase interval, and when the rotor position falls into the phase interval, the rotor position of the compressor is judged to be in the rotor phase with the minimum stress; when the rotor position is outside the phase zone, it is determined that the rotor position of the compressor is not in the rotor phase in which the stress is minimum.
Further, according to an embodiment of the present invention, when the rotor position of the compressor is not in the stress-minimum rotor phase, the compressor is controlled to operate at the current frequency, or the compressor receives a control command and operates according to a parameter corresponding to the control command.
That is, the compressor is stopped at the rotor phase where the stress of the compressor is minimum. Specifically, after the air conditioner receives a compressor stop signal and a controller of the air conditioner sends the compressor stop signal, the controller starts to control the compressor to stop, the position of a rotor of the compressor is obtained in the stop process of the air conditioner, namely the compressor, and if the rotor of the compressor is in the rotor phase with the minimum stress, the compressor is controlled to stop running immediately; otherwise, if the rotor of the compressor is not in the rotor phase with the minimum stress, controlling the compressor to continuously run at the current frequency; and controlling the compressor to stop until the rotor of the compressor is in the rotor phase with the minimum stress of the compressor, namely starting a rotor position sensor to detect the position of the rotor of the compressor at a preset time interval when the rotor of the compressor is not in the rotor phase with the minimum stress, stopping detecting the position of the rotor of the compressor until the rotor of the compressor is in the rotor phase with the minimum stress, and controlling the compressor to stop.
In an embodiment of the present invention, in order to further reduce the stress when the compressor is stopped, the stability of the compressor is improved. When the rotor of the compressor is not in the rotor phase with the minimum stress, calculating the phase difference between the current rotor position of the compressor and the rotor phase with the minimum stress, and when the phase difference is smaller than a preset value, reducing the frequency of the compressor, wherein the frequency can be gradually reduced according to a set step length, or gradually reduced according to set step lengths corresponding to different phase differences until the frequency of the compressor reaches a minimum threshold value, or the compressor is stopped. The preset values and the minimum threshold are set according to requirements and compressor performance.
In the embodiment, the compressor stop control is realized by determining the rotor phase with the minimum stress of the compressor, controlling the rotor position of the compressor when the compressor is stopped every time according to the determined rotor phase, stopping the compressor when the rotor position of the compressor is in the rotor phase, ensuring that the rotor position of the compressor when the compressor is stopped every time is close, ensuring the consistency of the vibration stress of the compressor when the compressor is stopped, ensuring the stability of the compressor and prolonging the service life of the compressor.
Further, after controlling the compressor to stop operating when the rotor position of the compressor is in the stress-minimum rotor phase, the air conditioner compressor stop control program is executed by the processor to perform the following operations:
controlling the compressor to operate; when a compressor stop instruction is received, starting a rotor position sensor to acquire the current rotor position of the compressor and acquiring the rotor position of the last compressor stop;
calculating the difference value between the current rotor position and the rotor position when the compressor is stopped last time; when the difference value is smaller than a second preset phase deviation threshold value, determining that the rotor position of the compressor is in the rotor phase with the minimum stress; when the difference is larger than or equal to a second preset phase deviation threshold value, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress;
the second preset phase deviation threshold is smaller than the first preset phase deviation threshold, and when the difference value is smaller than the second preset phase deviation threshold, the difference value between the current rotor position and the rotor phase with the minimum profit is smaller than the first preset phase deviation threshold.
The present embodiment differs from the above-described embodiments in that the rotor position at the last shutdown is taken as the phase value with the lowest stress at each shutdown, and a corresponding phase deviation threshold is set, except that the set phase deviation threshold is more accurate than the deviation from the initially determined rotor phase, and the allowable deviation is smaller, i.e. it is ensured that the set allowable range of the initially determined rotor phase with the lowest stress is also achieved by different reference manners of the rotor position. After the compressor is controlled to stop according to the rotor phase with the minimum stress, storing the rotor position of the compressor at the rotor phase with the minimum stress, and recording the stored rotor position of the compressor as the rotor phase with the minimum stress when the compressor is stopped next time; and controlling the compressor to stop when the rotor position of the compressor is in the recorded rotor phase when the compressor stop command is received next time.
Furthermore, an embodiment of the present invention further provides a computer-readable storage medium, where an air conditioner compressor shutdown control program is stored on the computer-readable storage medium, and when executed by a processor, the air conditioner compressor shutdown control program implements the following operations:
starting a rotor position sensor to determine a rotor phase with minimum stress of the compressor;
starting a rotor position sensor to acquire the position of a rotor of the compressor after receiving a compressor stop instruction;
and when the rotor position of the compressor is in the rotor phase with the minimum stress, controlling the compressor to stop running.
Further, the air conditioner compressor stop control program, when executed by the processor, further performs the following operations:
starting a rotor position sensor, stopping the compressor after controlling the compressor to operate to each phase of the compressor rotor, and detecting a corresponding stress value when the compressor operates to each phase and stops;
and determining the rotor phase with the minimum stress value of the compressor rotor according to each phase of the compressor rotor and the corresponding detected stress value.
Further, the air conditioner compressor stop control program, when executed by the processor, further performs the following operations:
and when the rotor position of the compressor is not in the rotor phase with the minimum stress, controlling the compressor to operate at the current frequency.
Further, the air conditioner compressor stop control program, when executed by the processor, further performs the following operations:
judging whether the rotor position of the compressor is consistent with the rotor phase with the minimum stress;
when the rotor position of the compressor is consistent with the rotor phase with the minimum stress, determining that the rotor position of the compressor is in the rotor phase with the minimum stress;
and when the rotor position of the compressor is inconsistent with the rotor phase with the minimum stress, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress.
Further, the air conditioner compressor stop control program, when executed by the processor, further performs the following operations:
calculating a phase difference between a rotor position of the compressor and the rotor phase at which the stress is minimum;
when the phase difference is smaller than a first preset phase deviation threshold value, determining that the rotor position of the compressor is in the rotor phase with the minimum stress;
and when the phase difference is larger than or equal to a first preset phase deviation threshold value, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress.
Further, the air conditioner compressor stop control program, when executed by the processor, further performs the following operations:
controlling the compressor to operate;
when a compressor stop instruction is received, starting a rotor position sensor to acquire the current rotor position of the compressor and acquiring the rotor position of the last compressor stop;
calculating the difference value between the current rotor position and the rotor position when the compressor is stopped last time;
when the difference value is smaller than a second preset phase deviation threshold value, determining that the rotor position of the compressor is in the rotor phase with the minimum stress;
when the difference is larger than or equal to a second preset phase deviation threshold value, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress;
the second preset phase deviation threshold is smaller than the first preset phase deviation threshold, and when the difference value is smaller than the second preset phase deviation threshold, the difference value between the current rotor position and the rotor phase with the minimum profit is smaller than the first preset phase deviation threshold.
Further, the air conditioner compressor stop control program, when executed by the processor, further performs the following operations:
and starting a rotor position sensor to detect the position of the rotor of the compressor at preset intervals, stopping detecting the position of the rotor of the compressor until the position of the rotor of the compressor is in the rotor phase with the minimum stress, and controlling the compressor to stop.
Further, the air conditioner compressor stop control program, when executed by the processor, further performs the following operations:
storing the rotor position of the compressor at the rotor phase with the minimum stress, and recording the stored rotor position of the compressor as the rotor phase with the minimum stress when the compressor is stopped next time; and controlling the compressor to stop when the rotor position of the compressor is in the recorded rotor phase when the compressor stop command is received next time.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. An air conditioner compressor stop control method is characterized by comprising the following steps:
starting a rotor position sensor to determine a rotor phase with minimum stress of the compressor;
starting a rotor position sensor to acquire the position of a rotor of the compressor after receiving a compressor stop instruction;
controlling the compressor to stop running when the rotor position of the compressor is in the rotor phase with the minimum stress;
and when the rotor of the compressor is not in the rotor phase with the minimum stress, calculating the phase difference between the current rotor position of the compressor and the rotor phase with the minimum stress, and reducing the frequency of the compressor when the phase difference is smaller than a preset value.
2. The air conditioner compressor shutdown control method of claim 1, wherein the step of activating the rotor position sensor to determine the rotor phase at which compressor stress is minimal comprises:
starting a rotor position sensor, stopping the compressor after controlling the compressor to operate to each phase of the compressor rotor, and detecting a corresponding stress value when the compressor operates to each phase and stops;
and determining the rotor phase with the minimum stress value of the compressor rotor according to each phase of the compressor rotor and the corresponding detected stress value.
3. The air conditioner compressor stop control method as claimed in claim 1, wherein before controlling the compressor to stop operating when the rotor position of the compressor is at the stress minimum rotor phase, further comprising:
judging whether the rotor position of the compressor is consistent with the rotor phase with the minimum stress;
when the rotor position of the compressor is consistent with the rotor phase with the minimum stress, determining that the rotor position of the compressor is in the rotor phase with the minimum stress;
and when the rotor position of the compressor is inconsistent with the rotor phase with the minimum stress, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress.
4. The air conditioner compressor stop control method as claimed in claim 1, wherein before controlling the compressor to stop operating when the rotor position of the compressor is at the stress minimum rotor phase, further comprising:
calculating a phase difference between a rotor position of the compressor and the rotor phase at which the stress is minimum;
when the phase difference is smaller than a first preset phase deviation threshold value, determining that the rotor position of the compressor is in the rotor phase with the minimum stress;
and when the phase difference is larger than or equal to a first preset phase deviation threshold value, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress.
5. The air conditioner compressor stop control method as set forth in claim 1, wherein said controlling said compressor after stopping operation when the rotor position of said compressor is in said stress minimizing rotor phase further comprises:
controlling the compressor to operate;
when a compressor stop instruction is received, starting a rotor position sensor to acquire the current rotor position of the compressor and acquiring the rotor position of the last compressor stop;
calculating the difference value between the current rotor position and the rotor position when the compressor is stopped last time;
when the difference value is smaller than a second preset phase deviation threshold value, determining that the rotor position of the compressor is in the rotor phase with the minimum stress;
when the difference is larger than or equal to a second preset phase deviation threshold value, determining that the rotor position of the compressor is not in the rotor phase with the minimum stress;
and when the difference value is smaller than the second preset phase deviation threshold value, the difference value between the current rotor position and the rotor phase with the minimum stress is smaller than the first preset phase deviation threshold value.
6. The air conditioner compressor stop control method as set forth in claim 1, wherein said step of controlling the compressor to operate at the current frequency when the rotor position of said compressor is not in said stress minimizing rotor phase, further comprises:
and starting a rotor position sensor to detect the position of the rotor of the compressor at preset intervals, stopping detecting the position of the rotor of the compressor until the position of the rotor of the compressor is in the rotor phase with the minimum stress, and controlling the compressor to stop.
7. The air conditioner compressor stop control method as set forth in claim 1, wherein said step of controlling said compressor to stop operating when said rotor position of said compressor is in said stress minimizing rotor phase further comprises:
storing the rotor position of the compressor at the rotor phase with the minimum stress, and recording the stored rotor position of the compressor as the rotor phase with the minimum stress when the compressor is stopped next time; and controlling the compressor to stop when the rotor position of the compressor is in the recorded rotor phase when the compressor stop command is received next time.
8. An air conditioner, characterized in that the air conditioner comprises: a memory, a processor and an air conditioner compressor shutdown control program stored on the memory and executable on the processor, the air conditioner compressor shutdown control program when executed by the processor implementing the steps of the air conditioner compressor shutdown control method of any one of claims 1 to 7.
9. A computer-readable storage medium, characterized in that an air conditioner compressor stop control program is stored thereon, which when executed by a processor implements the steps of the air conditioner compressor stop control method according to any one of claims 1 to 7.
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| CN108518809B (en) * | 2018-06-19 | 2020-09-25 | 广东美的制冷设备有限公司 | Air conditioner control method and device and air conditioner |
| CN112460771A (en) * | 2020-11-30 | 2021-03-09 | 珠海格力电器股份有限公司 | Compressor control method, device and system and storage medium |
| CN115200186A (en) * | 2022-06-24 | 2022-10-18 | 宁波奥克斯电气股份有限公司 | Air conditioner pipeline stress control method and device and air conditioner |
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| JP2001037281A (en) * | 1999-05-18 | 2001-02-09 | Matsushita Electric Ind Co Ltd | Motor torque controller |
| KR100590352B1 (en) * | 2003-03-17 | 2006-06-19 | 마츠시타 덴끼 산교 가부시키가이샤 | Air conditioner |
| JP6021472B2 (en) * | 2012-06-29 | 2016-11-09 | 三菱電機株式会社 | Compressor |
| JP2015186318A (en) * | 2014-03-24 | 2015-10-22 | カルソニックカンセイ株式会社 | Control device for electrically-driven compressor |
| CN203906245U (en) * | 2014-05-27 | 2014-10-29 | 广东美的制冷设备有限公司 | Detection platform for position of rotor of compressor |
| CN105715524A (en) * | 2016-03-09 | 2016-06-29 | 广东美的制冷设备有限公司 | Air conditioner as well as shutdown control method and device for compressor of air conditioner |
| CN105978433B (en) * | 2016-05-31 | 2018-12-18 | 广东美的制冷设备有限公司 | The motor driver and transducer air conditioning of capacitor miniaturization |
| CN106505527A (en) * | 2016-12-19 | 2017-03-15 | 广东美的制冷设备有限公司 | Motor drive protection device, over-voltage protection method and transducer air conditioning |
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