CN107270500B - Air conditioner, compressor control method thereof, and computer-readable storage medium - Google Patents
Air conditioner, compressor control method thereof, and computer-readable storage medium Download PDFInfo
- Publication number
- CN107270500B CN107270500B CN201710425181.6A CN201710425181A CN107270500B CN 107270500 B CN107270500 B CN 107270500B CN 201710425181 A CN201710425181 A CN 201710425181A CN 107270500 B CN107270500 B CN 107270500B
- Authority
- CN
- China
- Prior art keywords
- compressor
- current
- value
- air conditioner
- preset
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Air Conditioning Control Device (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a control method of an air conditioner compressor, wherein the air conditioner comprises a rectifying circuit, a Power Factor Correction (PFC) circuit and a compressor, the input end of the PFC circuit is connected with the output end of the rectifying circuit, the output end of the PFC circuit is connected with the compressor, and the control method of the air conditioner compressor comprises the following steps: detecting a current value of the compressor; comparing the current value of the compressor with a preset current frequency limiting threshold; and when the current value of the compressor is greater than or equal to the preset current frequency limit threshold, controlling the compressor to reduce the frequency for operation. The invention also discloses an air conditioner and a computer storage medium. The invention prevents the current of the compressor driving device and the working temperature of the motor in the compressor from continuously rising and keeps a stable state, thereby enabling the compressor to stably run, enabling the air conditioner to stably run and providing a comfortable indoor environment.
Description
Technical Field
The present invention relates to the field of household electrical appliances, and in particular, to an air conditioner, a compressor control method thereof, and a computer-readable storage medium.
Background
In a single-phase ac Power input system such as a household air conditioner, a single-phase ac Power from a Power grid usually passes through an uncontrollable full-bridge rectifier circuit, then passes through a PFC (Power Factor Correction) circuit to output a dc Power, and is connected to a large-capacity electrolytic capacitor and a load (e.g., a compressor, a fan, an internal switching Power supply, etc.).
In the related art, as the operating frequency of the compressor increases, the heat exchange capacity increases, the current of a compressor driving device (a compressor driving circuit) and the working temperature of a motor inside the compressor increase, so that the operating environment of the compressor becomes poor, the compressor cannot stably operate, and the air conditioner cannot stably operate.
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 control method thereof and a computer readable storage medium, and aims to solve the technical problems that the current of a compressor driving device (a compressor driving circuit) and the working temperature of a motor in the compressor are increased along with the increase of the operating frequency of the compressor, so that the operating environment of the compressor is deteriorated, the compressor cannot stably operate, and the air conditioner cannot stably operate.
In order to achieve the above object, the present invention provides a method for controlling a compressor of an air conditioner, wherein the air conditioner comprises a rectification circuit, a PFC circuit and a compressor, an input terminal of the PFC circuit is connected to an output terminal of the rectification circuit, and an output terminal of the PFC circuit is connected to the compressor, the method for controlling the compressor of the air conditioner comprises the following steps:
detecting a current value of the compressor;
comparing the current value of the compressor with a preset current frequency limiting threshold;
and when the current value of the compressor is greater than or equal to the preset current frequency limit threshold, controlling the compressor to reduce the frequency for operation.
Preferably, the air conditioner further includes a compressor driving circuit, and the output terminal of the PFC circuit is connected to the compressor through the compressor driving circuit, and the method further includes:
detecting the demagnetization current of the compressor, the rated current of the compressor driving circuit and the temperature of the outdoor environment;
setting a current frequency limiting threshold according to the demagnetization current of the compressor, the rated current of the compressor driving circuit and the temperature of the outdoor environment;
the preset current frequency limiting current is smaller than the demagnetization current of the compressor, the preset current frequency limiting current is smaller than the rated current of the compressor driving circuit, the outdoor environment temperature is higher, and the preset current frequency limiting current is smaller.
Preferably, the step of detecting the current value of the compressor includes:
obtaining effective values of three-phase currents of the compressor;
and calculating the average value of the effective values of the three-phase currents of the compressor, and marking the average value as the compressor current.
Preferably, after the step of obtaining the effective values of the three-phase currents of the compressor, the method further includes:
and determining the maximum value in the acquired absolute values of the effective values of the three-phase currents of the compressor, and marking the determined maximum value as the compressor current.
Preferably, the step of obtaining the effective value of the three-phase current of the compressor includes:
periodically detecting instantaneous values of three-phase currents of the compressor through high sampling frequency;
and calculating the effective value of the three-phase current of the compressor according to the detected instantaneous value.
Preferably, after the step of comparing the current value of the compressor with a preset current frequency limit threshold, the method further includes:
and when the current value of the compressor is smaller than the preset current frequency limit threshold value, controlling the compressor to keep the current frequency running.
Preferably, after the step of comparing the current value of the compressor with a preset current frequency limit threshold, the method further includes:
when the current value of the compressor is smaller than the preset current frequency limiting threshold value, judging whether the current value of the compressor is smaller than a preset value;
when the current value of the compressor is smaller than a preset value, controlling the compressor to perform frequency-up operation;
when the current value of the compressor is larger than the current value, controlling the compressor to keep the current frequency running;
and the preset value is smaller than the preset current frequency limiting threshold.
Preferably, when the current value of the compressor is greater than or equal to the preset current frequency limit threshold, the step of controlling the compressor to operate at a reduced frequency includes:
and controlling the compressor to gradually reduce the running frequency by preset step length until the current value of the compressor is smaller than the preset current frequency limit threshold.
In order to achieve the above object, the present invention further provides an air conditioner, including: the air conditioner compressor control program comprises a memory, a processor and an air conditioner compressor control program stored on the memory and capable of running on the processor, wherein the air conditioner compressor control program realizes the steps of the air conditioner compressor control method when being executed by the processor.
To achieve the above object, the present invention also provides a computer readable storage medium having stored thereon an air conditioner compressor control program, which when executed by a processor, implements the steps of the air conditioner compressor control method as described above.
The invention controls the frequency of the compressor according to the current of the compressor, further enables the compressor to operate in a stable frequency range, avoids the current of a compressor driving device and the working temperature of a motor in the compressor from continuously increasing, and keeps in a stable state, further enables the compressor to stably operate, enables the air conditioner to stably operate, and provides a comfortable indoor environment.
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 diagram of an air conditioner system according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating an embodiment of a method for controlling a compressor of an air conditioner according to 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: the air conditioner comprises a rectification circuit, a Power Factor Correction (PFC) circuit and a compressor, wherein the input end of the PFC circuit is connected with the output end of the rectification circuit, the output end of the PFC circuit is connected with the compressor, and the control method of the compressor of the air conditioner comprises the following steps: detecting a current value of the compressor; comparing the current value of the compressor with a preset current frequency limiting threshold; and when the current value of the compressor is greater than or equal to the preset current frequency limit threshold, controlling the compressor to reduce the frequency for operation.
As the prior art increases along with the increase of the operating frequency of the compressor, the heat exchange capacity is increased, the current of a compressor driving device (a compressor driving circuit) and the working temperature of a motor inside the compressor can be increased, so that the operating environment of the compressor is deteriorated, the compressor can not stably operate, and the air conditioner can not stably operate.
The invention provides a solution, which controls the frequency of the compressor according to the current of the compressor, so that the compressor can operate in a stable frequency range, avoids the current of a compressor driving device and the working temperature of a motor in the compressor from continuously increasing, and keeps in a stable state, so that the compressor can stably operate, the air conditioner stably operates, and a comfortable indoor environment is provided.
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. The operation of the compressor of the air conditioner is controlled through the terminal, and the frequency of the compressor is controlled.
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, and an infrared 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, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and an air conditioner compressor control 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 call the air conditioner compressor control program stored in the memory 1005 and perform the following operations:
detecting a current value of the compressor; comparing the current value of the compressor with a preset current frequency limiting threshold; and when the current value of the compressor is greater than or equal to the preset current frequency limit threshold, controlling the compressor to reduce the frequency for operation. The above operation is performed to control the operation of the air conditioner compressor by the processor 1001 calling the air conditioner compressor control program stored in the memory 1005.
Further, the processor 1001 may call the air conditioner compressor control program stored in the memory 1005, and also perform the following operations:
the air conditioner also comprises a compressor driving circuit, wherein the output end of the PFC circuit is connected with the compressor through the compressor driving circuit, and the method also comprises the following steps:
detecting the demagnetization current of the compressor, the rated current of the compressor driving circuit and the temperature of the outdoor environment;
setting a current frequency limiting threshold according to the demagnetization current of the compressor, the rated current of the compressor driving circuit and the temperature of the outdoor environment;
the preset current frequency limiting current is smaller than the demagnetization current of the compressor, the preset current frequency limiting current is smaller than the rated current of the compressor driving circuit, the outdoor environment temperature is higher, and the preset current frequency limiting current is smaller.
Further, the processor 1001 may call the air conditioner compressor control program stored in the memory 1005, and also perform the following operations:
obtaining effective values of three-phase currents of the compressor;
and calculating the average value of the effective values of the three-phase currents of the compressor, and marking the average value as the compressor current.
Further, after the step of obtaining the effective values of the three-phase currents of the compressor, the processor 1001 may call the air conditioner compressor control program stored in the memory 1005, and further perform the following operations:
and determining the maximum value in the acquired absolute values of the effective values of the three-phase currents of the compressor, and marking the determined maximum value as the compressor current.
Further, the processor 1001 may call the air conditioner compressor control program stored in the memory 1005, and also perform the following operations:
periodically detecting instantaneous values of three-phase currents of the compressor through high sampling frequency;
and calculating the effective value of the three-phase current of the compressor according to the detected instantaneous value.
Further, the processor 1001 may call the air conditioner compressor control program stored in the memory 1005, and also perform the following operations:
and when the current value of the compressor is smaller than the preset current frequency limit threshold value, controlling the compressor to keep the current frequency running.
Further, the processor 1001 may call the air conditioner compressor control program stored in the memory 1005, and also perform the following operations:
when the current value of the compressor is smaller than the preset current frequency limiting threshold value, judging whether the current value of the compressor is smaller than a preset value;
when the current value of the compressor is smaller than a preset value, controlling the compressor to perform frequency-up operation;
when the current value of the compressor is larger than the current value, controlling the compressor to keep the current frequency running;
and the preset value is smaller than the preset current frequency limiting threshold.
Further, the processor 1001 may call the air conditioner compressor control program stored in the memory 1005, and also perform the following operations:
and controlling the compressor to gradually reduce the running frequency by preset step length until the current value of the compressor is smaller than the preset current frequency limit threshold.
The following describes an air conditioner compressor control method and an air conditioner according to an embodiment of the present invention with reference to the accompanying drawings. The single-phase ac Power supply is rectified by a rectifier circuit and then input to a Power Factor Correction (PFC) circuit. According to the example of fig. 2, wherein the input terminal of the rectifier circuit 10 is connected to a single-phase alternating current power supply AC, the rectifier circuit 10 is configured to rectify the single-phase alternating current power supplied from the single-phase alternating current power supply AC to obtain a rectified direct current power; the input end of the PFC circuit 20 is connected to the output end of the rectification circuit 10, the output end of the PFC circuit 20 is connected to the compressor 30, and the PFC circuit 20 is used for performing power factor correction on a power supply. In addition, an electrolytic capacitor 40 may be further provided in parallel between the output terminal of the PFC circuit 20 and the compressor 30. In addition, a compressor driving circuit 50 may be provided in series between the output terminal of the PFC circuit 20 and the compressor 30.
That is, the single-phase AC power AC is subjected to uncontrollable full-wave rectification by the rectification circuit 10, and then is subjected to the PFC circuit 20 to output the electrolytic capacitor 40 having a large capacity in the street, thereby supplying power to the compressor 30 by driving of the compressor driving circuit 50. The rectifier circuit 10 and the PFC circuit 20 are used as input circuits of a power supply device in the air conditioner.
The PFC circuit 20 may be a PFC circuit having a boost function, or may be a PFC circuit having no boost function. When the PFC circuit with the Boost function is adopted, the PFC circuit 20 may perform a Boost process on the rectified dc while performing a power factor correction on the power supply, so as to provide a stable dc voltage for the electrolytic capacitor 40 and the compressor 30, and in this case, the PFC circuit 20 is preferably a Boost-type PFC circuit, which may include a first inductor, a power switch tube and a first diode. When the PFC circuit without the boost function is used, the PFC circuit 20 performs only the power factor correction on the power supply and does not perform the boost process on the rectified direct current, and at this time, the PFC circuit without the boost function may include a second inductor, a first capacitor, and a second diode.
With reference to the embodiment of fig. 2, an embodiment of the present invention provides a method for controlling a compressor of an air conditioner.
Fig. 3 is a flowchart of a compressor control method of an air conditioner according to an embodiment of the present invention. The air conditioner comprises a rectification circuit, a Power Factor Correction (PFC) circuit and a compressor, wherein the input end of the PFC circuit is connected with the output end of the rectification circuit, and the output end of the PFC circuit is connected with the compressor. Referring to fig. 3, the air conditioner compressor control method includes:
step S10, detecting a current value of the compressor;
during operation of the air conditioner, the value of the compressed current is detected, for example, the compressed operating current is detected directly by the current detection means.
In one embodiment of the present invention, the step of detecting the current value of the compressor includes: obtaining effective values of three-phase currents of the compressor; and calculating the average value of the effective values of the three-phase currents of the compressor, and marking the average value as the compressor current. The compressor current is the average value of effective values of three-phase currents of the compressor. The method for acquiring the effective value of the three-phase current of the compressor comprises the following steps: the instantaneous values of the three-phase currents of the compressor are periodically detected through a high sampling frequency, and the effective values of the three-phase currents are calculated according to the detected instantaneous values. The high sampling frequency may be 6KHZ or 8KHZ, etc. Step S20 is executed after the current value of the compressor is detected. In an embodiment of the present invention, the current value of the compressor may be calculated by: obtaining effective values of three-phase currents of the compressor; and determining the maximum value in the acquired absolute values of the effective values of the three-phase currents of the compressor, and marking the determined maximum value as the compressor current. The instantaneous value of the three-phase current of the compressor is detected by a high sampling frequency (such as 6kHz), the maximum value of the absolute value of the three-phase current is calculated, and the maximum value in each mechanical period is evaluated and used as the peak value of the compressor phase current for frequency limiting control. The peak value of the compressor phase current is max mechanical period { max (| Iu |, | Iv |, | Iw |) }, where Iu, Iv, Iw are the compressor three-phase currents, | is the absolute value, and max is the maximum value.
Step S20, comparing the current value of the compressor with a preset current frequency limiting threshold value;
and after the current value of the compressor is detected, comparing the current value of the compressor with a preset current frequency limiting threshold value. In an embodiment of the present invention, the setting manner of the preset current frequency-limiting threshold includes: detecting the demagnetization current of the compressor, the rated current of the compressor driving circuit and the temperature of the outdoor environment; setting a current frequency limiting threshold according to the demagnetization current of the compressor, the rated current of the compressor driving circuit and the temperature of the outdoor environment; the preset current frequency limiting current is smaller than the demagnetization current of the compressor, the preset current frequency limiting current is smaller than the rated current of the compressor driving circuit, the outdoor environment temperature is higher, and the preset current frequency limiting current is smaller. Setting a compressor current frequency limiting threshold according to the compressor demagnetization current, the rated current of a compressor driving device and the outdoor side temperature, wherein the compressor current frequency limiting threshold must be smaller than the compressor demagnetization current, and the compressor current frequency limiting threshold must be smaller than the rated current of the compressor driving device; dividing the outdoor side temperature into a plurality of partitions, making a segmented relation lookup table of the outdoor side temperature and the compressor current frequency limiting threshold, wherein the higher the outdoor side temperature is (the worse the compressor is cooled, the smaller the allowable compressor temperature rise is), the smaller the compressor current frequency limiting threshold is; the following table is an example of the temperature split into 5 segments.
| Outdoor side temperature zone | <0℃ | 0～20℃ | 20～40℃ | 40～60℃ | >60℃ |
| Compressor current frequency-limiting threshold | Threshold value 1 | Threshold value 2 | Threshold value 3 | Threshold value 4 | Threshold value 5 |
In an embodiment of the invention, the values of the current of the compressor comprise: 1) the average value of the effective values of the three-phase currents of the compressor; 2) the peak value of the phase current of the compressor is obtained by comparing the current value of the compressor with a preset current frequency limiting threshold, for example, comparing the average value of the effective values of the three-phase current of the compressor with the preset current frequency limiting threshold, or comparing the peak value of the phase current of the compressor with the preset current frequency limiting threshold.
And step S30, when the current value of the compressor is greater than or equal to the preset current frequency limit threshold, controlling the compressor to operate at a reduced frequency.
In one embodiment of the present invention, controlling the compressor to operate at a reduced frequency comprises: and controlling the compressor to gradually reduce the running frequency by preset step length until the current value of the compressor is smaller than the preset current frequency limit threshold. In addition, the operation frequency can also be reduced according to different step lengths until the current value of the compressor is smaller than the preset current frequency limit threshold.
And when the current value of the compressor is smaller than the preset current frequency limit threshold value, controlling the compressor to keep the current frequency running.
In an embodiment of the present invention, when the current value of the compressor is smaller than the preset current frequency limit threshold, determining whether the current value of the compressor is smaller than a preset value; when the current value of the compressor is smaller than a preset value, controlling the compressor to perform frequency-up operation; when the current value of the compressor is larger than the current value, controlling the compressor to keep the current frequency running; and the preset value is smaller than the preset current frequency limiting threshold.
In order to avoid the change of the current of the compressor caused by the external environment or the external control of the air conditioner, the working state of the compressor is judged once in each control period, and when the current of the compressor is more than or equal to the current limiting threshold of the compressor, the running frequency of the compressor is reduced by the step length of frequency reduction (1 HZ/S); when the current of the compressor is smaller than the frequency limiting threshold value of the current of the compressor and larger than a preset value (the frequency limiting threshold value of the current of the compressor-the piezoelectric current limiting lag interval), controlling the compressor to keep the current frequency running; and when the current of the compressor is smaller than a preset value (compressor current limiting threshold value-current limiting slow interval), controlling the up-conversion operation of the compressor by the up-conversion step (for example, 1 HZ/S).
In the embodiment of the invention, after the rotating speed of the compressor is reduced to a certain degree, the working efficiency of the compressor is almost 0, and at this time, the compressor can be controlled to stop in order to avoid the idle consumption of the compressor, so that whether the rotating speed of the compressor is less than the stop rotating speed is judged after the rotating speed of the compressor is reduced every time, and if so, the compressor is controlled to stop. It is understood that, in order to prevent the compressor from stopping working to affect the normal use of the air conditioner, it is preferable that the compressor is controlled to operate according to the stop threshold when it is determined that the rotation speed of the compressor is less than the rotation speed threshold.
The frequency of the compressor is controlled according to the current of the compressor in the embodiment, so that the compressor can operate in a stable frequency range, the current magnitude of a compressor driving device and the working temperature of a motor in the compressor are prevented from being continuously increased and kept in a stable state, the compressor can be stably operated, and the air conditioner stably operates to provide a comfortable indoor environment.
In addition, an embodiment of the present invention further provides an air conditioner, where the air conditioner includes a memory, a processor, and an air conditioner compressor control program that is stored in the memory and is executable on the processor, and when executed by the processor, the air conditioner compressor control program implements the following operations:
detecting a current value of the compressor; comparing the current value of the compressor with a preset current frequency limiting threshold; and when the current value of the compressor is smaller than the preset current frequency limit threshold value, controlling the compressor to keep the current frequency running. Referring to fig. 2, the air conditioner includes a rectifier circuit 10, a PFC circuit 20, and a compressor 30, wherein an input terminal of the PFC circuit 20 is connected to an output terminal of the rectifier circuit 10, and an output terminal of the PFC circuit 20 is connected to the compressor 30. In addition, an electrolytic capacitor 40 may be further provided in parallel between the output terminal of the PFC circuit 20 and the compressor 30. In addition, a compressor driving circuit 50 may be provided in series between the output terminal of the PFC circuit 20 and the compressor 30. The air conditioner compressor control program which is run on the memory and the processor is used as a control unit to control the frequency of the compressor, and the frequency of the compressor is limited by controlling the frequency of the compressor through the air conditioner compressor control program, so that the output power is reduced, the purpose of reducing the current of the compressor is achieved, and the running reliability of the compressor is kept. Specifically, the air conditioner compressor control program is executed by the processor to perform the following specific operations:
during operation of the air conditioner, the value of the compressed current is detected, for example, the compressed operating current is detected directly by the current detection means.
In one embodiment of the present invention, the step of detecting the current value of the compressor includes: obtaining effective values of three-phase currents of the compressor; and calculating the average value of the effective values of the three-phase currents of the compressor, and marking the average value as the compressor current. The compressor current is the average value of effective values of three-phase currents of the compressor. The method for acquiring the effective value of the three-phase current of the compressor comprises the following steps: the instantaneous values of the three-phase currents of the compressor are periodically detected through a high sampling frequency, and the effective values of the three-phase currents are calculated according to the detected instantaneous values. The high sampling frequency may be 6KHZ or 8KHZ, etc. In an embodiment of the present invention, the current value of the compressor may be calculated by: obtaining effective values of three-phase currents of the compressor; and determining the maximum value in the acquired absolute values of the effective values of the three-phase currents of the compressor, and marking the determined maximum value as the compressor current. The instantaneous value of the three-phase current of the compressor is detected by a high sampling frequency (such as 6kHz), the maximum value of the absolute value of the three-phase current is calculated, and the maximum value in each mechanical period is evaluated and used as the peak value of the compressor phase current for frequency limiting control. The peak value of the compressor phase current is max mechanical period { max (| Iu |, | Iv |, | Iw |) }, where Iu, Iv, Iw are the compressor three-phase currents, | is the absolute value, and max is the maximum value.
And after the current value of the compressor is detected, comparing the current value of the compressor with a preset current frequency limiting threshold value. In an embodiment of the present invention, the setting manner of the preset current frequency-limiting threshold includes: detecting the demagnetization current of the compressor, the rated current of the compressor driving circuit and the temperature of the outdoor environment; setting a current frequency limiting threshold according to the demagnetization current of the compressor, the rated current of the compressor driving circuit and the temperature of the outdoor environment; the preset current frequency limiting current is smaller than the demagnetization current of the compressor, the preset current frequency limiting current is smaller than the rated current of the compressor driving circuit, the outdoor environment temperature is higher, and the preset current frequency limiting current is smaller. Setting a compressor current frequency limiting threshold according to the compressor demagnetization current, the rated current of a compressor driving device and the outdoor side temperature, wherein the compressor current frequency limiting threshold must be smaller than the compressor demagnetization current, and the compressor current frequency limiting threshold must be smaller than the rated current of the compressor driving device; dividing the outdoor side temperature into a plurality of partitions, making a segmented relation lookup table of the outdoor side temperature and the compressor current frequency limiting threshold, wherein the higher the outdoor side temperature is (the worse the compressor is cooled, the smaller the allowable compressor temperature rise is), the smaller the compressor current frequency limiting threshold is; the following table is an example of the temperature split into 5 segments.
| Outdoor side temperature zone | <0℃ | 0～20℃ | 20～40℃ | 40～60℃ | >60℃ |
| Compressor current frequency-limiting threshold | Threshold value 1 | Threshold value 2 | Threshold value 3 | Threshold value 4 | Threshold value 5 |
In an embodiment of the invention, the values of the current of the compressor comprise: 1) the average value of the effective values of the three-phase currents of the compressor; 2) the peak value of the phase current of the compressor is obtained by comparing the current value of the compressor with a preset current frequency limiting threshold, for example, comparing the average value of the effective values of the three-phase current of the compressor with the preset current frequency limiting threshold, or comparing the peak value of the phase current of the compressor with the preset current frequency limiting threshold.
And when the current value of the compressor is greater than or equal to the preset current frequency limit threshold, controlling the compressor to reduce the frequency for operation.
In one embodiment of the present invention, controlling the compressor to operate at a reduced frequency comprises: and controlling the compressor to gradually reduce the running frequency by preset step length until the current value of the compressor is smaller than the preset current frequency limit threshold. In addition, the operation frequency can also be reduced according to different step lengths until the current value of the compressor is smaller than the preset current frequency limit threshold.
In an embodiment of the present invention, when the current value of the compressor is smaller than the preset current frequency limit threshold, determining whether the current value of the compressor is smaller than a preset value; when the current value of the compressor is smaller than a preset value, controlling the compressor to perform frequency-up operation; when the current value of the compressor is larger than the current value, controlling the compressor to keep the current frequency running; and the preset value is smaller than the preset current frequency limiting threshold.
In order to avoid the change of the current of the compressor caused by the external environment or the external control of the air conditioner, the working state of the compressor is judged once in each control period, and when the current of the compressor is more than or equal to the current limiting threshold of the compressor, the running frequency of the compressor is reduced by the step length of frequency reduction (1 HZ/S); when the current of the compressor is smaller than the frequency limiting threshold value of the current of the compressor and larger than a preset value (the frequency limiting threshold value of the current of the compressor-the piezoelectric current limiting lag interval), controlling the compressor to keep the current frequency running; and when the current of the compressor is smaller than a preset value (compressor current limiting threshold value-current limiting slow interval), controlling the up-conversion operation of the compressor by the up-conversion step (for example, 1 HZ/S).
In the embodiment of the invention, after the rotating speed of the compressor is reduced to a certain degree, the working efficiency of the compressor is almost 0, and at this time, the compressor can be controlled to stop in order to avoid the idle consumption of the compressor, so that whether the rotating speed of the compressor is less than the stop rotating speed is judged after the rotating speed of the compressor is reduced every time, and if so, the compressor is controlled to stop. It is understood that, in order to prevent the compressor from stopping working to affect the normal use of the air conditioner, it is preferable that the compressor is controlled to operate according to the stop threshold when it is determined that the rotation speed of the compressor is less than the rotation speed threshold.
The frequency of the compressor is controlled according to the current of the compressor in the embodiment, so that the compressor can operate in a stable frequency range, the current magnitude of a compressor driving device and the working temperature of a motor in the compressor are prevented from being continuously increased and kept in a stable state, the compressor can be stably operated, and the air conditioner stably operates to provide a comfortable indoor environment.
Furthermore, an embodiment of the present invention further provides a computer-readable storage medium, where an air conditioner compressor control program is stored on the computer-readable storage medium, and when executed by a processor, the air conditioner compressor control program implements the following operations:
detecting a current value of the compressor;
comparing the current value of the compressor with a preset current frequency limiting threshold;
and when the current value of the compressor is greater than or equal to the preset current frequency limit threshold, controlling the compressor to reduce the frequency for operation.
Further, the air conditioner compressor control program, when executed by the processor, performs the operations of:
detecting the demagnetization current of the compressor, the rated current of the compressor driving circuit and the temperature of the outdoor environment;
setting a current frequency limiting threshold according to the demagnetization current of the compressor, the rated current of the compressor driving circuit and the temperature of the outdoor environment;
the preset current frequency limiting current is smaller than the demagnetization current of the compressor, the preset current frequency limiting current is smaller than the rated current of the compressor driving circuit, the outdoor environment temperature is higher, and the preset current frequency limiting current is smaller.
Further, the air conditioner compressor control program, when executed by the processor, performs the operations of:
obtaining effective values of three-phase currents of the compressor;
and calculating the average value of the effective values of the three-phase currents of the compressor, and marking the average value as the compressor current.
Further, after the step of obtaining the effective values of the three-phase currents of the compressor, the air conditioner compressor control program, when executed by the processor, performs the following operations:
and determining the maximum value in the acquired absolute values of the effective values of the three-phase currents of the compressor, and marking the determined maximum value as the compressor current.
Further, the air conditioner compressor control program, when executed by the processor, performs the operations of:
periodically detecting instantaneous values of three-phase currents of the compressor through high sampling frequency;
and calculating the effective value of the three-phase current of the compressor according to the detected instantaneous value.
Further, the air conditioner compressor control program, when executed by the processor, performs the operations of:
and when the current value of the compressor is smaller than the preset current frequency limit threshold value, controlling the compressor to keep the current frequency running.
Further, the air conditioner compressor control program, when executed by the processor, performs the operations of:
when the current value of the compressor is smaller than the preset current frequency limiting threshold value, judging whether the current value of the compressor is smaller than a preset value;
when the current value of the compressor is smaller than a preset value, controlling the compressor to perform frequency-up operation;
when the current value of the compressor is larger than the current value, controlling the compressor to keep the current frequency running;
and the preset value is smaller than the preset current frequency limiting threshold.
Further, the air conditioner compressor control program, when executed by the processor, performs the operations of:
and controlling the compressor to gradually reduce the running frequency by preset step length until the current value of the compressor is smaller than the preset current frequency limit threshold.
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. A control method for an air conditioner compressor is characterized in that the air conditioner comprises a rectifying circuit, a Power Factor Correction (PFC) circuit and a compressor, wherein the input end of the PFC circuit is connected with the output end of the rectifying circuit, and the output end of the PFC circuit is connected with the compressor, and the control method for the air conditioner compressor comprises the following steps:
detecting a current value of the compressor;
comparing the current value of the compressor with a preset current frequency limiting threshold;
when the current value of the compressor is greater than or equal to the preset current frequency limit threshold value, controlling the compressor to reduce the frequency for operation;
the air conditioner also comprises a compressor driving circuit, wherein the output end of the PFC circuit is connected with the compressor through the compressor driving circuit, and the method also comprises the following steps:
detecting the demagnetization current of the compressor, the rated current of the compressor driving circuit and the temperature of the outdoor environment;
setting a current frequency limiting threshold according to the demagnetization current of the compressor, the rated current of the compressor driving circuit and the temperature of the outdoor environment;
the preset current frequency limiting threshold is smaller than the demagnetization current of the compressor, the preset current frequency limiting threshold is smaller than the rated current of the compressor driving circuit, the outdoor environment temperature is higher, and the preset current frequency limiting threshold is smaller.
2. The air conditioner compressor control method as claimed in claim 1, wherein the step of detecting the current value of the compressor comprises:
obtaining effective values of three-phase currents of the compressor;
and calculating the average value of the effective values of the three-phase currents of the compressor, and marking the average value as the compressor current.
3. The air conditioner compressor control method as claimed in claim 2, wherein the step of obtaining the effective values of the three-phase currents of the compressor is followed by further comprising:
and determining the maximum value in the acquired absolute values of the effective values of the three-phase currents of the compressor, and marking the determined maximum value as the compressor current.
4. The air conditioner compressor control method as claimed in claim 2, wherein the step of obtaining the effective values of the three-phase currents of the compressor comprises:
periodically detecting instantaneous values of three-phase currents of the compressor through high sampling frequency;
and calculating the effective value of the three-phase current of the compressor according to the detected instantaneous value.
5. The air conditioner compressor control method as claimed in any one of claims 1 to 4, wherein after the step of comparing the current value of the compressor with a preset current frequency limit threshold, further comprising:
and when the current value of the compressor is smaller than the preset current frequency limit threshold value, controlling the compressor to keep the current frequency running.
6. The air conditioner compressor control method as claimed in any one of claims 1 to 4, wherein after the step of comparing the current value of the compressor with a preset current frequency limit threshold, further comprising:
when the current value of the compressor is smaller than the preset current frequency limiting threshold value, judging whether the current value of the compressor is smaller than a preset value;
when the current value of the compressor is smaller than a preset value, controlling the compressor to perform frequency-up operation;
when the current value of the compressor is larger than a preset value, controlling the compressor to keep the current frequency running;
and the preset value is smaller than the preset current frequency limiting threshold.
7. The air conditioner compressor control method as claimed in any one of claims 1 to 4, wherein the step of controlling the compressor to operate at a reduced frequency when the current value of the compressor is greater than or equal to the preset current frequency limit threshold comprises:
and controlling the compressor to gradually reduce the running frequency by preset step length until the current value of the compressor is smaller than the preset current frequency limit threshold.
8. An air conditioner, characterized in that the air conditioner comprises: a memory, a processor and an air conditioner compressor control program stored on the memory and executable on the processor, the air conditioner compressor control program when executed by the processor implementing the steps of the air conditioner compressor control method of any one of claims 1 to 7.
9. A computer-readable storage medium, characterized in that an air conditioner compressor control program is stored thereon, which when executed by a processor implements the steps of the air conditioner compressor control method according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710425181.6A CN107270500B (en) | 2017-06-07 | 2017-06-07 | Air conditioner, compressor control method thereof, and computer-readable storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710425181.6A CN107270500B (en) | 2017-06-07 | 2017-06-07 | Air conditioner, compressor control method thereof, and computer-readable storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107270500A CN107270500A (en) | 2017-10-20 |
| CN107270500B true CN107270500B (en) | 2020-03-06 |
Family
ID=60066978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710425181.6A Active CN107270500B (en) | 2017-06-07 | 2017-06-07 | Air conditioner, compressor control method thereof, and computer-readable storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107270500B (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990497B (en) * | 2017-11-15 | 2019-11-12 | 广东美的制冷设备有限公司 | Progress control method, device, compressor and computer readable storage medium |
| CN108488991B (en) * | 2018-03-20 | 2021-01-26 | 广东美的制冷设备有限公司 | Air conditioner fault detection method and device, air conditioner and storage medium |
| CN108895634B (en) * | 2018-07-26 | 2020-07-03 | 奥克斯空调股份有限公司 | Compressor control method and device |
| CN109059375B (en) * | 2018-07-30 | 2020-12-01 | 广东斯科曼制冷设备有限公司 | Self-adaptive current value control method of compressor |
| CN109442669B (en) * | 2018-11-12 | 2020-11-24 | 奥克斯空调股份有限公司 | Air conditioner control method and device and air conditioner |
| CN110762736A (en) * | 2019-11-04 | 2020-02-07 | 宁波奥克斯电气股份有限公司 | Control method and system, variable frequency air conditioner and computer readable storage medium |
| CN111251825B (en) * | 2020-01-20 | 2023-06-16 | 广州华凌制冷设备有限公司 | Operation control method and device, plug-in air conditioner and computer storage medium |
| CN111397090B (en) * | 2020-03-26 | 2021-12-24 | 广东美的制冷设备有限公司 | Air conditioner detection method, air conditioner and computer readable storage medium |
| CN111720975A (en) * | 2020-06-22 | 2020-09-29 | 珠海格力电器股份有限公司 | Control method, system and device of air conditioner |
| CN111780338B (en) * | 2020-07-13 | 2021-10-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Control method and device of air conditioner |
| CN111934532B (en) * | 2020-07-15 | 2022-02-01 | 海信（山东）空调有限公司 | Voltage-multiplying rectification PFC circuit, control method thereof and variable-frequency air conditioner |
| CN111934533B (en) * | 2020-07-15 | 2022-02-01 | 海信（山东）空调有限公司 | Voltage-multiplying rectification PFC circuit, control method thereof, storage medium and variable-frequency air conditioner |
| CN112732006B (en) * | 2020-12-11 | 2023-01-24 | 珠海格力电器股份有限公司 | Control method and device of air sterilizer and air sterilizer |
| CN114992773B (en) * | 2021-03-02 | 2024-03-26 | 广东美的暖通设备有限公司 | Operation control method of air conditioner, air conditioner and computer readable storage medium |
| CN113162395B (en) * | 2021-05-10 | 2023-02-28 | 海信空调有限公司 | PFC (power factor correction) control method and device of variable frequency air conditioner and variable frequency air conditioner |
| CN113432280B (en) * | 2021-06-29 | 2023-10-20 | 佛山市顺德区美的电子科技有限公司 | Air conditioning equipment control method and device and air conditioning equipment |
| CN113701322B (en) * | 2021-09-02 | 2023-06-23 | 佛山市顺德区美的电子科技有限公司 | Air conditioner control method, controller, air conditioner and computer readable storage medium |
| CN114322267B (en) * | 2022-01-04 | 2024-01-26 | 广东美的制冷设备有限公司 | Air conditioner control method, air conditioner and storage medium |
| CN115111749B (en) * | 2022-08-08 | 2023-07-18 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device, multi-split air conditioner and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9088232B2 (en) * | 2009-08-10 | 2015-07-21 | Emerson Climate Technologies, Inc. | Power factor correction with variable bus voltage |
| CN105099322A (en) * | 2015-08-05 | 2015-11-25 | 广东美的制冷设备有限公司 | Variable-frequency air-conditioner current frequency limiting method and device |
| CN105864970A (en) * | 2016-04-12 | 2016-08-17 | 青岛海尔空调器有限总公司 | Method and device used for regulating consumption power of air conditioner |
| CN105932871A (en) * | 2016-05-27 | 2016-09-07 | 广东美的制冷设备有限公司 | Control method of compressor in air conditioner, control device of compressor in air conditioner, and air conditioner |
-
2017
- 2017-06-07 CN CN201710425181.6A patent/CN107270500B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9088232B2 (en) * | 2009-08-10 | 2015-07-21 | Emerson Climate Technologies, Inc. | Power factor correction with variable bus voltage |
| CN105099322A (en) * | 2015-08-05 | 2015-11-25 | 广东美的制冷设备有限公司 | Variable-frequency air-conditioner current frequency limiting method and device |
| CN105864970A (en) * | 2016-04-12 | 2016-08-17 | 青岛海尔空调器有限总公司 | Method and device used for regulating consumption power of air conditioner |
| CN105932871A (en) * | 2016-05-27 | 2016-09-07 | 广东美的制冷设备有限公司 | Control method of compressor in air conditioner, control device of compressor in air conditioner, and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107270500A (en) | 2017-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107270500B (en) | Air conditioner, compressor control method thereof, and computer-readable storage medium | |
| CN107702282B (en) | Communication method and device of multi-split air conditioning system and computer readable storage medium | |
| CN108061426B (en) | Refrigerator control method, refrigerator and computer-readable storage medium | |
| CN106642579B (en) | Starting frequency adjusting method and device suitable for air conditioner compressor | |
| CN108119986B (en) | Air conditioner control method, electronic device, and computer-readable storage medium | |
| CN107676938B (en) | Air conditioner control method and device, electronic equipment and computer readable storage medium | |
| CN108599549B (en) | Totem pole PFC circuit, pulse width control method, air conditioner and storage medium | |
| CN108809075B (en) | Totem pole PFC circuit, pulse width control method, air conditioner and storage medium | |
| CN108809074B (en) | Totem-pole PFC circuit, pulse control method, air conditioner and storage medium | |
| CN110426554B (en) | Household load electrical characteristic extraction method and device and computer readable storage medium | |
| CN108200473B (en) | CPU power control method, smart television and storage medium | |
| CN107883561B (en) | Control method and device for preventing condensation of air guide strip and computer readable storage medium | |
| CN107101345B (en) | Air conditioner, compressor stop control method thereof and computer readable storage medium | |
| CN107482898B (en) | PFC circuit jitter frequency control method and device and readable storage medium | |
| CN108317696B (en) | Control method and device of air conditioner and computer readable storage medium | |
| CN108895632A (en) | Switching method, air conditioner and the computer readable storage medium of pfc circuit | |
| CN110617208A (en) | DC brushless water pump and no-load protection method thereof | |
| CN107421066B (en) | Control method and device of air conditioning system, computer storage medium and air conditioning system | |
| CN108696116B (en) | Totem pole PFC circuit, pulse width control method, air conditioner and storage medium | |
| US11251624B2 (en) | Energy efficiency control method, control apparatus, and communications device | |
| CN110553350B (en) | Control method of air conditioner, air conditioner and storage medium | |
| CN108131794B (en) | Air conditioner fan control method, electronic device and computer readable storage medium | |
| CN108119996B (en) | Air conditioner fan control method, electronic device and computer readable storage medium | |
| CN111023465A (en) | Control method and device of air conditioner, air conditioner and readable storage medium | |
| US20150005947A1 (en) | Electronic device and method for controlling rotation speed of fan thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |