Air conditioner, control method thereof and readable storage medium

Abstract

The invention provides an air conditioner and a control method thereof and a readable storage medium, and the air conditioner control method comprises the steps that if a working unit to be subjected to noise reduction is in a stable operation stage, the phase current peak sum of the working unit to be subjected to noise reduction is obtained; if the phase current peak value meets a preset condition, determining a correction strategy according to a numerical value region where the current operation parameter of the working unit to be subjected to noise reduction is located; correcting the operation parameters according to the correction strategy; and controlling the working unit to be subjected to noise reduction to operate according to the corrected operating parameters. The air conditioner and the readable storage medium can realize the control method of the air conditioner. According to phase current peak detection of the compressor and the fan, the noise source is subjected to control noise reduction, the influence on the energy efficiency of the air conditioner during noise reduction can be reduced, and the noise source can be more accurately subjected to noise reduction under the condition that the cost is not increased.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioner control, and particularly to an air conditioner, a control method thereof, and a readable storage medium. Background Art

[0002] There is a prior noise reduction control method for an air conditioner, which includes obtaining the real-time operating noise value of the indoor unit when the air conditioner is running; when the real-time operating noise value is greater than the real-time noise threshold, adjusting the compressor frequency and controlling the compressor to operate at the adjusted frequency; and determining the real-time noise threshold according to the real-time rotational speed value of the indoor unit.

[0003] However, the existing noise reduction control method determines the noise reduction threshold according to the rotational speed of the indoor unit for noise reduction. In fact, even when the air conditioner is in a stable rotational speed stage, noise problems may still occur, and the existing noise reduction control method fails to effectively solve the noise problem for the noise source. Summary of the Invention

[0004] The first object of the present invention is to provide an air conditioner control method for noise reduction based on the peak value of the phase current, so as to achieve a better noise reduction effect.

[0005] The second object of the present invention is to provide an air conditioner capable of implementing the above air conditioner control method.

[0006] The third object of the present invention is to provide a readable storage medium capable of implementing the above air conditioner control method.

[0007] The air conditioner control method provided by the first object of the present invention includes, when it is determined that the working unit to be noise-reduced is in a stable operation stage, obtaining the peak value of the phase current of the working unit to be noise-reduced; if the peak value of the phase current meets a preset condition, determining a correction strategy according to the numerical region where the current operating parameters of the working unit to be noise-reduced are located; correcting the operating parameters according to the correction strategy; and controlling the working unit to be noise-reduced to operate according to the corrected operating parameters.

[0008] As can be seen from the above solution, during the use of the air conditioner, more noise will occur due to reasons such as working condition changes and equipment aging. Specifically, when the outdoor unit of the air conditioner is used for a long time, it will cause parts to rust and corrode, increasing the friction between parts. Fluctuations in external loads and changes in internal friction can all lead to unstable phase currents. Unstable phase currents will cause changes in the intensity and direction of the electromagnetic field inside the motor, thereby causing fluctuations in electromagnetic torque. The fluctuations in electromagnetic torque directly affect the rotation of the motor rotor, resulting in speed fluctuations. Speed fluctuations will cause an imbalance in the force between the motor rotor and the stator, leading to vibrations, and ultimately resulting in collisions and friction between mechanical parts, generating noise. For this reason, according to the phenomenon that unstable phase current peaks will cause speed fluctuations of the compressor or the fan, resulting in an increase in internal mechanical vibrations and noise, the present invention detects the phase current peaks of the compressor and the fan and accordingly corrects the operating parameters of working units such as the compressor or the fan until the phase current peaks decrease, thereby controlling and reducing the noise source. The present invention can reduce the impact of the noise reduction process on the energy efficiency of the air conditioner and more accurately reduce the noise source without increasing costs. In addition, the present invention mainly reduces noise during the stable operation stage of the compressor and the fan. As long as working units such as the compressor and the fan are in the stable operation stage, noise reduction can be performed, and it is not required that the compressor is currently in a specific state such as high frequency or low frequency.

[0009] A further solution is that the working unit to be noise-reduced includes a compressor and / or a fan; the operating parameter of the compressor is frequency; the operating parameter of the fan is speed.

[0010] As can be seen from the above, the problems of friction and collision caused by long-term use are particularly obvious in the outdoor unit. For this reason, the compressor inside the outdoor unit and the fan inside the outdoor unit are the main working units to be noise-reduced. Correcting the frequency of the compressor and / or the speed of the fan according to the phase current peak can more specifically reduce the noise of the outdoor unit.

[0011] A further solution is that if the compressor operates at the current frequency for more than a first preset duration, it is determined that the compressor is in the stable operation stage.

[0012] As can be seen from the above, this determination ensures that the compressor is not in the frequency increase or decrease stage.

[0013] A further solution is that in the step of obtaining the phase current peak of the working unit to be noise-reduced: multiple first phase current peaks of the compressor are obtained through continuous detection; after the step of obtaining the phase current peak of the working unit to be noise-reduced: a first phase current peak variance value is calculated according to the multiple first phase current peaks; the preset condition includes a first preset condition corresponding to the compressor, and the first preset condition is that the first phase current peak variance value is greater than a preset first variance threshold.

[0014] As can be seen from the above, when the compressor operates stably, the peak value of the phase current is also relatively stable. The larger the variance value, the more unstable the phase current. Judging the change of the peak value of the compressor phase current according to the calculated variance value of the peak value of the phase current is more conducive to diagnosing noise problems and utilizing the noise reduction effect.

[0015] A further solution is that in the step of determining the correction strategy according to the numerical region where the current operating parameters of the work unit to be noise-reduced are located, it includes that if the current frequency of the compressor is greater than the frequency threshold, the correction strategy is determined to lower the frequency according to the preset frequency correction value; if the current frequency of the compressor is less than the frequency threshold, the correction strategy is determined to increase the frequency according to the preset frequency correction value.

[0016] As can be seen from the above, if the frequency is greater than the frequency threshold, it is judged that the compressor is operating at a high frequency, and even a small fluctuation of the phase current is likely to generate noise. By judging the fluctuation of the compressor phase current, the frequency is corrected downward at this time. On the contrary, it indicates that the compressor is not operating at a high frequency, and a slight fluctuation of the phase current is not likely to generate noise, and the frequency is corrected upward at this time. This method can make a floating adjustment to the frequency during the stable operation stage of the compressor, so as not to sacrifice the refrigeration capacity due to noise reduction.

[0017] Another further solution is that if the fan operates at the current gear for more than the second preset duration, it is determined that the fan is in the stable operation stage.

[0018] As can be seen from the above, this determination ensures that the fan is not in the acceleration or deceleration stage.

[0019] A further solution is that in the step of obtaining the peak value of the phase current of the work unit to be noise-reduced: multiple second peak values of the phase current of the fan are obtained by continuous detection; after the step of obtaining the peak value of the phase current of the work unit to be noise-reduced: the variance value of the second peak value of the phase current is calculated according to the multiple second peak values of the phase current; the preset condition includes a second preset condition corresponding to the fan, and the second preset condition is that the variance value of the second peak value of the phase current is greater than the preset second variance threshold.

[0020] As can be seen from the above, when the fan operates stably, the peak value of the phase current is also relatively stable. The larger the variance value, the more unstable the phase current. Judging the change of the peak value of the fan phase current according to the calculated variance value of the peak value of the phase current is more conducive to diagnosing noise problems and utilizing the noise reduction effect.

[0021] A further solution is that in the step of determining the correction strategy according to the numerical region where the current operating parameters of the work unit to be noise-reduced are located, it includes that if the current speed of the fan is greater than the speed threshold, the correction strategy is determined to lower the speed according to the preset speed correction value; if the current speed of the fan is less than the speed threshold, the correction strategy is determined to increase the speed according to the preset speed correction value.

[0022] As can be seen from the above, if the rotational speed is greater than the rotational speed threshold, it is determined that the fan is operating at a high rotational speed, and even a small fluctuation in the phase current can easily generate noise. By judging the fluctuation of the fan phase current, the rotational speed is corrected downward at this time. On the contrary, it indicates that the fan is not operating at a high rotational speed, and a slight fluctuation in the phase current is not likely to generate noise. At this time, the rotational speed is corrected upward. This method can make a floating adjustment to the rotational speed during the stable operation stage of the fan, so as not to sacrifice the heat exchange effect for noise reduction.

[0023] The air conditioner provided by the second object of the present invention includes a processor, and when the processor executes a computer program stored in a memory, the above-mentioned air conditioner control method is implemented.

[0024] A readable storage medium provided by the third object of the present invention stores a computer program, and when the computer program is executed by a processor, the above-mentioned air conditioner control method is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is the first flowchart of the embodiment of the air conditioner control method of the present invention.

[0026] Figure 2 It is the second flowchart of the embodiment of the air conditioner control method of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Embodiment of the air conditioner control method Refer to Figure 1 , Figure 1 The following shows the method flow for noise reduction of the compressor in the air conditioner control method of the present invention. The compressor is one of the working units to be noise-reduced in the present invention, and its operating parameter is frequency.

[0028] The air conditioner control method includes: After the air conditioner is powered on and turned on for five minutes, the current frequency of the compressor is detected. Subsequently, step S1 is executed to determine whether the compressor is in a stable operation stage. Further, if the compressor operates at the current frequency for more than a first preset duration, it is determined that the compressor is in a stable operation stage. In this embodiment, the first preset duration is 15 seconds. When the operation duration t of the compressor operating at the current frequency 压缩机 > 15s, that is, the judgment result of step S1 is yes, it is determined that the compressor is in a stable operation stage. If the judgment result of step S1 is no, the timer is reset to zero and step S1 is continuously looped and executed.

[0029] Subsequently, step S2 is executed to obtain a series of consecutive first phase current peaks I1, I2......I of the compressor through continuous detection n , and step S3 is executed to calculate the average value of the phase current peaks:

[0030] Then calculate the variance value a of the peak value of the first-phase current 2 :

[0031] Then execute step S4 to determine whether the compressor is currently operating at high frequency. Mainly, it is to determine whether the current frequency f of the compressor is greater than the preset frequency threshold of 80 Hz. When the compressor is operating at high frequency, even small fluctuations in the phase current can easily generate noise. Therefore, it is determined whether it is high frequency based on the frequency threshold, and different correction strategies are determined accordingly.

[0032] If the judgment result of step S4 is yes, then execute step S5; if the judgment result is no, then execute step S7. Whether it is step S5 or step S7, it is necessary to judge whether the variance value a of the peak value of the first-phase current 2 is greater than the preset first variance threshold a0 2 : a 2 > a0 2 , if so, it means that the phase current fluctuation will generate excessive noise and the compressor frequency needs to be corrected.

[0033] When the judgment result of step S5 or step S7 is no, it means that the phase current fluctuation will not generate large noise and the compressor frequency does not need to be corrected, and the process ends.

[0034] The judgment result of step S4 mainly affects the subsequent frequency correction strategy.

[0035] When the judgment result of step S5 is yes, then execute step S6 to lower the frequency, and the correction strategy is determined to be based on the preset frequency correction value F 修正 Lower the frequency f: f = f - F 修正 When the judgment result of step S7 is yes, then execute step S8 to increase the frequency, and the correction strategy is determined to be based on the preset frequency correction value F 修正 Increase the frequency f: f = f + F 修正 where F 修正 = f×(a 2 - a0 2 ) / K f K f is a preset coefficient, and the ideal value can be obtained according to experimental tests.

[0036] After steps S5 and S7 complete the correction of the frequency f, control the compressor to operate at the corrected frequency f, and the timer is reset to zero and return to step S1 to continuously detect the change of the peak value of the phase current and dynamically adjust the frequency f to achieve a better noise reduction effect.

[0037] See Figure 2 , Figure 2 The following shows the method flow for reducing the noise of the fan of the outdoor unit of the air conditioner in the air conditioner control method of the present invention. The fan is another working unit to be noise-reduced in the present invention, and its operating parameter is the rotational speed.

[0038] The air conditioner control method includes: After the air conditioner is powered on and starts up for five minutes, the current rotational speed of the fan is detected. Subsequently, step S11 is executed to determine whether the fan is in the stable operation stage. Further, if the fan operates at the current rotational speed for more than the second preset duration, it is determined that the fan is in the stable operation stage. In this embodiment, the second preset duration is 15 seconds. When the operation duration t of the fan operating at the current rotational speed 风机 > 15s, that is, the judgment result of step S11 is yes, it is determined that the fan is in the stable operation stage. If the judgment result of step S11 is no, the timer is reset to zero and step S11 is continuously looped and executed.

[0039] Subsequently, step S12 is executed to obtain a continuous plurality of second-phase current peaks of the fan through continuous detection, and step S13 is executed to calculate the average value of the phase current peaks, and then calculate the variance value of the second-phase current peaks. The calculation method of the variance value of the second-phase current peaks is the same as that of the first-phase current peaks.

[0040] Then step S14 is executed to determine whether the fan is currently operating at a high rotational speed. Mainly, it is to determine whether the current rotational speed n of the fan is greater than the preset rotational speed threshold of 800 rad. When the fan is operating at a high rotational speed, even a small fluctuation in the phase current will easily generate noise. Therefore, it is determined whether it is at a high rotational speed according to the rotational speed threshold, so as to determine different correction strategies.

[0041] If the judgment result of step S14 is yes, step S15 is executed; if the judgment result is no, step S17 is executed. Whether it is step S15 or step S17, it is determined whether the variance value a2 of the second-phase current peaks 2 is greater than the preset second variance threshold a1 2 : a2 2 >a1 2 , if so, it means that the phase current fluctuation will generate excessive noise and the rotational speed of the fan needs to be corrected.

[0042] When the judgment result of step S15 or step S17 is no, it means that the phase current fluctuation will not generate large noise and there is no need to correct the rotational speed of the fan, and the process ends.

[0043] The judgment result of step S14 mainly affects the subsequent correction strategy for the rotational speed.

[0044] If the judgment result in step S15 is yes, then step S16 is executed to lower the rotational speed, and the correction strategy is determined to be based on a preset rotational speed correction value N 修正 Lower the rotational speed n: n = n - N 修正 If the judgment result in step S17 is yes, then step S18 is executed to increase the rotational speed, and the correction strategy is determined to be based on a preset rotational speed correction value N 修正 Increase the rotational speed N: n = n + N 修正 Wherein, N 修正 = n × (a2 2 - a1 2 ) / K n K n is a preset coefficient, and an ideal value can be obtained according to experimental tests.

[0045] After steps S15 and S17 complete the correction of the rotational speed n, control the blower to operate at the corrected rotational speed n, and reset the timer and return to step S11 to continuously detect the change in the peak value of the phase current and perform dynamic adjustment on the rotational speed n, so as to achieve a better noise reduction effect.

[0046] According to the present invention, unstable peak values of the phase current will cause fluctuations in the rotational speed of the compressor or the blower, resulting in an increase in internal mechanical vibration and noise. By detecting the peak values of the phase current of the compressor and the blower and accordingly correcting the operating parameters of working units such as the compressor or the blower until the peak value of the phase current decreases, noise source control and noise reduction can be achieved. The present invention can reduce the impact of the noise reduction process on the energy efficiency of the air conditioner and more accurately reduce the noise of the noise source without increasing costs.

[0047] In addition, the present invention mainly performs noise reduction during the stable operation stage of the compressor and the blower. As long as working units such as the compressor and the blower are in the stable operation stage, noise reduction processing can be performed, and it is not required that the compressor is currently in a specific state such as high frequency or low frequency.

[0048] In addition, during the stable operation stage of the compressor and the blower, the operating parameters can be adjusted up and down to achieve noise reduction while avoiding sacrificing the refrigeration effect and the heat exchange effect of the compressor.

[0049] In addition, the working unit to be noise-reduced in the present invention can also be the blower of the indoor unit.

[0050] Embodiment of the air conditioner The air conditioner of the present invention includes devices such as a processor and a memory, such as a single-chip microcomputer including a central processing unit. Moreover, when the processor executes the computer program stored in the memory, all steps of the air conditioner control method of the present invention are implemented.

[0051] The so-called processor may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0052] The memory mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the handheld terminal (such as audio data, phone book, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, FlashCard, at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

[0053] Embodiment of the readable storage medium The readable storage medium of the present invention may be any form of storage medium readable by the processor of the computer device, including but not limited to non-volatile memory, volatile memory, ferroelectric memory, etc. A computer program is stored on the readable storage medium. When the processor of the computer device reads and executes the computer program stored in the memory, the steps of the above-described air conditioner control method can be implemented.

[0054] The computer program includes computer program code, which may be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice within the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0055] Finally, it should be emphasized that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An air conditioner control method, characterized in that, Including: When it is determined that the work unit to be noise-reduced is in a stable operation stage, obtaining the peak value of the phase current of the work unit to be noise-reduced; If the peak value of the phase current meets the preset conditions, determining a correction strategy according to the numerical range where the current operating parameters of the work unit to be noise-reduced are located; Correcting the operating parameters according to the correction strategy; Controlling the work unit to be noise-reduced to operate according to the corrected operating parameters.

2. The air conditioner control method according to claim 1, characterized in that: The work unit to be noise-reduced includes a compressor and / or a fan; The operating parameter of the compressor is frequency; The operating parameter of the fan is rotational speed.

3. The air conditioner control method according to claim 2, characterized in that: If the compressor operates at the current frequency for more than a first preset duration, it is determined that the compressor is in a stable operation stage.

4. The air conditioner control method according to claim 2, characterized in that: In the step of obtaining the peak value of the phase current of the work unit to be noise-reduced: Obtaining a plurality of first peak values of the phase current of the compressor through continuous detection; After the step of obtaining the peak value of the phase current of the work unit to be noise-reduced: Calculating a first variance value of the peak value of the phase current according to the plurality of first peak values of the phase current; The preset conditions include a first preset condition corresponding to the compressor, and the first preset condition is that the first variance value of the peak value of the phase current is greater than a preset first variance threshold.

5. The air conditioner control method according to claim 2, characterized in that: In the step of determining a correction strategy according to the numerical range where the current operating parameters of the work unit to be noise-reduced are located, it includes: If the current frequency of the compressor is greater than the frequency threshold, the correction strategy is determined to lower the frequency according to a preset frequency correction value; If the current frequency of the compressor is less than the frequency threshold, the correction strategy is determined to increase the frequency according to a preset frequency correction value.

6. The air conditioner control method according to any one of claims 2 to 5, characterized in that: If the fan operates at the current wind speed for more than a second preset duration, it is determined that the fan is in a stable operation stage.

7. The air conditioner control method according to claim 6, characterized in that: In the step of obtaining the peak value of the phase current of the work unit to be noise-reduced: Obtaining a plurality of second peak values of the phase current of the fan through continuous detection; After the step of obtaining the peak value of the phase current of the work unit to be noise-reduced: Calculating a second variance value of the peak value of the phase current according to the plurality of second peak values of the phase current; The preset conditions include a second preset condition corresponding to the fan, and the second preset condition is that the second variance value of the peak value of the phase current is greater than a preset second variance threshold.

8. The air conditioner control method according to claim 6, characterized in that: In the step of determining a correction strategy according to the numerical range where the current operating parameters of the work unit to be noise-reduced are located, it includes: If the current rotational speed of the fan is greater than the rotational speed threshold, the correction strategy is determined to lower the rotational speed according to a preset rotational speed correction value; If the current rotational speed of the blower is less than the rotational speed threshold, the correction strategy is determined to increase the rotational speed according to a preset rotational speed correction value.

9. Air conditioner, characterized in that: It includes a processor, and the processor is used to implement the air conditioner control method according to any one of claims 1 to 8 above when executing a computer program stored in a memory.

10. A readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the air conditioner control method according to any one of claims 1 to 8 above.

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