A control method for silent operation of an air conditioner, a storage medium, and an air conditioner

Abstract

This invention discloses a control method, storage medium, and air conditioner for silent operation of an air conditioner, belonging to the field of air conditioning control technology. The method includes: when the unit is in cooling mode, if a silent operation command is received, the following steps are executed: detecting the unit's low operating pressure; if the unit's low operating pressure is within a target low pressure range, then successively reducing the compressor frequency according to a set first gradient until the unit's low operating pressure after the compressor frequency reduction exceeds the upper limit of the target low pressure range; then controlling the compressor to operate at the frequency adjusted in the previous reduction; and detecting the unit's high operating pressure after the compressor operates at this frequency; if the unit's high operating pressure is within a target high pressure range, then successively reducing the outdoor fan speed according to a set second gradient until the unit's high operating pressure after the outdoor fan speed reduction exceeds the upper limit of the target high pressure range; then controlling the outdoor fan to operate at the speed adjusted in the previous reduction. Using this invention, while ensuring that the unit's basic capabilities meet requirements, the compressor frequency and outdoor fan speed can be further reduced, optimizing the silent operation effect.

Description

Technical Field

[0001] This invention relates to the field of air conditioning control technology, and in particular to a control method, storage medium, and air conditioner for silent operation of an air conditioner. Background Technology

[0002] Considering the lower ambient noise at night, and to avoid the noise from the outdoor unit affecting the customer experience, air conditioners are often designed with a nighttime silent mode. The existing silent operation mode is generally achieved by manually reducing the maximum operating values ​​of the compressor and the outdoor fan (e.g., the compressor's maximum operating frequency is 80Hz during normal operation, but it is 65Hz after entering the nighttime silent mode), and it is enabled by default at the factory.

[0003] In silent mode, the primary goal is often to achieve lower operating noise. However, existing solutions simply limit the compressor and fan to the highest possible operating frequency. In actual cooling operation, the low pressure is often the control target. When the system low pressure is higher than the target, the compressor output increases; when it's lower, the output decreases. The outdoor fan speed is controlled by the system high pressure; when it's higher, the fan speed increases; when it's lower, the speed decreases. However, because the target low pressure is a range (e.g., 6-9 Bar at 35°C), and the compressor's low-pressure compensation is not incremental but rather increases in increments (e.g., the compressor increases by 4Hz each time), the unit may remain at the lower limit of the target low pressure, meaning the compressor operates at the limited highest frequency. In this case, the high pressure will also be in a higher range, leading to a higher outdoor fan speed, and thus failing to achieve truly silent operation.

[0004] Therefore, it is evident that the existing methods for controlling the silent mode of air conditioners have room for further reduction in the operating frequency of the compressor and outdoor fan, and have not yet achieved true maximum quietness. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a control method, storage medium and air conditioner for quiet operation of an air conditioner, which can reduce the compressor frequency and the speed of the external fan as much as possible while ensuring that the basic capacity of the unit meets the requirements.

[0006] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution:

[0007] In a first aspect, the present invention provides a control method for quiet operation of an air conditioner, comprising:

[0008] When the unit is in cooling mode, in response to receiving a silent operation command, it performs the following silent control operations;

[0009] The unit is operating at low pressure; compare it with the preset target low pressure range.

[0010] If the unit's operating low pressure is within the target low pressure range, the compressor frequency is controlled to decrease sequentially at the set first gradient until the unit's operating low pressure after the compressor frequency decreases exceeds the upper limit of the target low pressure range. Then, the compressor is controlled to operate at the frequency after the last reduction adjustment, and the unit's operating high pressure after the compressor operates at this frequency is detected.

[0011] The operating high voltage of the unit is compared with the preset target high voltage range:

[0012] If the unit's operating high voltage is within the target high voltage range, the external fan speed is gradually reduced using the set second gradient until the unit's operating high voltage exceeds the upper limit of the target high voltage range after the external fan speed is reduced. Then, the external fan is controlled to operate at the speed adjusted in the previous reduction.

[0013] Optionally, the method of the present invention further includes: when comparing the detected low operating pressure of the unit with a preset target low pressure range, if the low operating pressure of the unit exceeds the upper limit of the target low pressure range, then the compressor frequency is successively increased according to a set third gradient until the low operating pressure of the unit after the compressor frequency increase is within the target low pressure range. The present invention enables the low pressure of the unit to be as close as possible to the upper limit of the target low pressure range when the compressor operates at the finally determined frequency. If the initial low pressure of the unit exceeds the limit, it is necessary to first adjust the low pressure of the unit to return to the target low pressure range, and then adjust the compressor frequency according to the aforementioned silent control operation logic until a compressor frequency value under the first gradient standard that is closest to the upper limit of the target low pressure range is obtained.

[0014] Optionally, the method of the present invention further includes: when comparing the detected unit operating high pressure with a preset target high pressure range, if the unit operating high pressure exceeds the upper limit of the target high pressure range, then the external fan speed is successively increased according to a set fourth gradient until the unit operating high pressure after the external fan speed is increased is within the target high pressure range. Similar to the compressor frequency control logic, after the compressor frequency is initially set, if the unit high pressure exceeds the limit during initial detection, it needs to be adjusted to restore the unit high pressure to the target high pressure range. Then, the external fan speed is reduced according to the aforementioned silent control operation logic until an external fan speed is obtained where the unit high pressure is closest to the upper limit of the target high and low pressure range under a third gradient standard. Thus, the present invention enables the unit high pressure to be as close as possible to the upper limit of the target high pressure range when the external fan is running at the finally determined speed.

[0015] Optionally, the third gradient is greater than the first gradient. This setting can quickly adjust the unit's target low pressure to the target low pressure range when the initial low pressure detection does not meet the target low pressure range, and then begin to approximate the target low pressure upper limit by reducing the compressor frequency, thereby improving the compressor frequency control adjustment efficiency.

[0016] Optionally, the fourth gradient is greater than or equal to the second gradient. Similar to adjusting the compressor frequency, this embodiment can improve the efficiency of external fan speed control.

[0017] Optionally, the detection of low operating pressure of the unit includes: after the unit receives a silent operation command and enters silent operation mode, waiting for a set system stabilization time before detecting the low operating pressure of the unit;

[0018] The detection of the unit's operating high pressure after the compressor operates at this frequency includes: after the unit has been running at the frequency set for a stabilization period since the last adjustment, the unit's operating high pressure is detected. This implementation method, by stabilizing the system before each adjustment when detecting the unit's low or high pressure, allows for a more accurate and reliable determination of the control strategy.

[0019] Optionally, the step of successively controlling the compressor frequency to decrease according to a set first gradient until the unit's operating low pressure after the compressor frequency decreases exceeds the upper limit of the target low pressure range, and then controlling the compressor to operate at the frequency adjusted in the previous reduction, includes:

[0020] S11, control the compressor frequency to decrease according to the first gradient, and after the unit has been running for a set stable time, determine whether the real-time low pressure of the unit exceeds the upper limit of the target low pressure range. If it exceeds, proceed to step S12; if it does not exceed, proceed to step S11.

[0021] S12 controls the compressor to run at the frequency before the last reduction adjustment.

[0022] Optionally, the first gradient can be 1Hz, and the third gradient can be a conventional 4Hz.

[0023] Optionally, the step of successively controlling the outdoor fan speed to decrease according to a set second gradient until the unit's operating high pressure after the outdoor fan speed decreases exceeds the upper limit of the target high pressure range, and then controlling the outdoor fan to operate at the speed adjusted in the previous reduction, includes:

[0024] S21, control the speed of the external fan to decrease according to the third gradient. After the unit has been running for a set time, determine whether the real-time operating high pressure of the unit exceeds the upper limit of the target high pressure range. If it exceeds, proceed to step S22; if it does not exceed, proceed to step S21.

[0025] S22 controls the external fan to run at the speed before the last speed reduction adjustment.

[0026] Optionally, considering that the speed of the external fan is generally divided into different levels, in this invention, the first gradient and the fourth gradient can each be a level 1, that is, each increase and decrease in the speed of the external fan is adjusted according to a level 1 gradient. Considering the need for more efficient adjustment when the initial high pressure of the unit exceeds the target high pressure range, the number of levels for increasing the speed of the external fan each time can also be set to be greater than the number of levels for decreasing the speed.

[0027] Optionally, the set stabilization time is 3 minutes, and this time range can be set according to the actual unit operation and experience.

[0028] In a second aspect, the present invention provides an air conditioner comprising a compressor, a fan, and a controller, wherein the controller is used to implement the steps of the control method for silent operation of the air conditioner as described in the first aspect.

[0029] Thirdly, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the control method for silent operation of an air conditioner as described in the first aspect.

[0030] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0031] 1) By comparing the unit's low operating pressure with the upper limit of the target low pressure range, the compressor's operating frequency is adjusted so that the compressor operates at a frequency that allows the unit's low pressure to approach the upper limit of the target low pressure range. Then, by comparing the unit's high pressure with the upper limit of the target high pressure range, the outdoor fan speed is adjusted so that the outdoor fan operates at a speed that allows the unit's high pressure to approach the upper limit of the target high pressure range. This maximizes the unit's basic operating capacity while minimizing the compressor frequency and outdoor fan speed, optimizing the quietness of the outdoor unit's operation. Attached Figure Description

[0032] Figure 1 The diagram shown is the unit operation logic diagram of the control method for silent operation of a conventional air conditioner;

[0033] Figure 2 The diagram shown is a flowchart of the silent operation control method for air conditioners according to one embodiment of the present invention.

[0034] Figure 3 The diagram shown is a flowchart of the air conditioner silent operation control method of the present invention in another embodiment. Implementation

[0035] refer to Figure 1In conventional air conditioning silent operation control, the air conditioner compressor uses low pressure as the control target. When the system low pressure is higher than the target, the compressor output increases; when it is lower, the output decreases. The outdoor fan speed uses the system high pressure as the control target; when it is higher than the target, the fan speed increases; when it is lower, the speed decreases. Existing technology simply limits the highest operating frequency of the compressor and fan, without considering the impact of system low and high pressure on the unit's operation. Therefore, the operating frequencies of the compressor and outdoor fan can be further limited, failing to achieve true ultimate silence.

[0036] The technical concept of this invention is as follows: the compressor operating frequency is adjusted with the low pressure of the unit as the control target, so that the low pressure of the system continuously approaches the upper limit of the target low pressure range. Then, the outdoor fan speed is adjusted with the high pressure of the unit as the control target, so that the high pressure of the system continuously approaches the upper limit of the target high pressure range. In this way, the air conditioner can achieve near-ultimate quiet operation in silent mode.

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.

[0038] Example 1

[0039] This embodiment describes a control method for silent operation of an air conditioner. Figure 2 This is the operating logic of the air conditioning unit in this embodiment. The compressor frequency is controlled by the low pressure. When the system low pressure is higher than the target, the compressor output will be increased, and when it is lower than the target, the output will be reduced. The outdoor fan speed is controlled by the system high pressure. When it is higher than the target, the fan speed will be increased, and when it is lower than the target, the speed will be reduced. Figure 3 This embodiment only illustrates the logical order of the methods described. In other possible embodiments of the invention, different methods may be used, provided they do not conflict with each other. Figure 1 Complete the steps shown or described in the order indicated.

[0040] Specifically, the air conditioner silent operation control method of this embodiment includes:

[0041] When the unit is in cooling mode, in response to receiving a silent operation command, it performs the following silent control operations;

[0042] The unit is operating at low pressure; compare it with the preset target low pressure range.

[0043] If the unit's operating low pressure is within the target low pressure range, the compressor frequency is controlled to decrease sequentially at the set first gradient until the unit's operating low pressure after the compressor frequency decreases exceeds the upper limit of the target low pressure range. Then, the compressor is controlled to operate at the frequency after the last reduction adjustment, and the unit's operating high pressure after the compressor operates at this frequency is detected.

[0044] It should be noted that, compared to the compressor frequency adjustment gradient in normal, non-silent operation mode, the first gradient set here is smaller than the compressor frequency adjustment gradient in normal mode. This allows for multiple compressor frequency adjustments, bringing the unit's operating low pressure closer to the upper limit of the target low pressure range. Here, the compressor operates at the frequency after the last reduction adjustment; that is, the compressor frequency is increased according to the first gradient at the current operating frequency. Those skilled in the art can also choose to increase the compressor frequency according to a new gradient different from the first gradient, depending on the specific circumstances.

[0045] The operating high voltage of the unit is compared with the preset target high voltage range:

[0046] If the unit's operating high voltage is within the target high voltage range, the external fan speed is gradually reduced using the set second gradient until the unit's operating high voltage exceeds the upper limit of the target high voltage range after the external fan speed is reduced. Then, the external fan is controlled to operate at the speed adjusted in the previous reduction.

[0047] It should be noted that, compared to the outdoor fan speed adjustment gradient in the non-silent normal operation mode, the second gradient set here is smaller than the outdoor fan speed adjustment gradient in normal mode. This allows for multiple adjustments to the outdoor fan speed, bringing the unit's operating high pressure closer to the upper limit of the target high pressure range. Here, the outdoor fan operates at the frequency after the last reduction adjustment; that is, the outdoor fan speed is increased according to the second gradient at the current operating level. Those skilled in the art can also choose to increase the outdoor fan speed according to a new gradient different from the second gradient, depending on the specific circumstances.

[0048] It is understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0049] Example 2

[0050] This embodiment is an improvement upon embodiment 1. Figure 3 This is a flowchart illustrating the control method for silent operation of the air conditioner in this embodiment. Specifically, in conjunction with... Figure 2 and Figure 3 The method in this embodiment includes the following steps:

[0051] Step (1): The unit operates in cooling mode;

[0052] Step (2): Determine whether the unit has entered silent mode. If yes, proceed to step (3); otherwise, return to step (1).

[0053] Step (3): Obtain the unit's operating low pressure and determine whether the unit's operating low pressure is less than or equal to the upper limit of the target low pressure range. If yes, proceed to step (4); otherwise, proceed to step (5).

[0054] Step (4): Control the compressor frequency to decrease at the set first gradient, and execute step (6).

[0055] Step (5): Increase the compressor frequency by setting the third gradient, and return to step (3);

[0056] Step (6): Determine whether the low pressure of the unit operation is greater than the upper limit of the target low pressure range. If yes, proceed to step (7); otherwise, return to step (4).

[0057] Step (7): Control the compressor to run at the frequency adjusted in the last reduction, and proceed to step (8).

[0058] Step (8): Obtain the unit's operating high voltage and determine whether the unit's operating high voltage is less than or equal to the upper limit of the target high voltage range. If yes, proceed to step (9); otherwise, proceed to step (10).

[0059] Step (9): Control the external fan speed to decrease using the set second gradient, and execute step (11);

[0060] Step (10): Increase the speed of the external fan by controlling the fourth gradient as set, and return to step (8);

[0061] Step (11): Determine whether the operating high voltage of the unit is greater than the upper limit of the target high voltage range. If yes, proceed to step (12); otherwise, return to step (9).

[0062] Step (12): Control the external fan to run at the speed adjusted in the last time.

[0063] It should be noted that, for the first gradient in step (4) and the third gradient in step (5), those skilled in the art can select and set different gradients according to actual factors such as compressor model and ambient temperature. Preferably, the first gradient is smaller than the third gradient to achieve efficient compressor quiet control under the condition of initial low-pressure over-limit of the unit. For the second gradient in step (9) and the fourth gradient in step (10), those skilled in the art can select and set different gradients according to actual factors such as outdoor fan model and ambient temperature. Preferably, the second gradient is smaller than the fourth gradient to achieve efficient outdoor fan quiet control under the condition of initial high-pressure over-limit of the unit.

[0064] In this embodiment, the air conditioner enters silent operation in cooling mode, first stabilizing for a preset period of time before measuring the unit's low-pressure operation. After adjusting the operating frequency of the compressor and outdoor fan, it runs at the current frequency for a preset period of time before detecting the unit's low-pressure and high-pressure operation. The preset time can be set by those skilled in the art according to actual conditions such as air conditioner model, ambient temperature, and air pressure.

[0065] It should also be noted that in step (7), the compressor operates at the frequency adjusted in the previous reduction, that is, the compressor frequency is increased according to the first gradient control at the current operating frequency. Those skilled in the art can also choose to increase the compressor frequency according to a new gradient different from the first gradient, or maintain the current operating frequency, depending on the specific circumstances. In step (12), the outdoor fan operates at the frequency adjusted in the previous reduction, that is, the outdoor fan speed is increased according to the second gradient control at the current operating level. Those skilled in the art can also choose to increase the outdoor fan speed according to a new gradient different from the second gradient, depending on the specific circumstances, or maintain the current speed operation.

[0066] The following example illustrates the air conditioner silent operation control method of this embodiment.

[0067] Assuming the silent mode is limited to a frequency of 65 Hz, the target low-pressure range is 6-9 bar, and the target high-pressure range is 19-23 bar; according to the existing silent operation control logic in air conditioning cooling mode, after the unit stabilizes based on the initial energy requirements, if the compressor frequency is 60 Hz and the outdoor fan speed is 750 r / min, the system high-pressure value is 21 bar and the low-pressure value is 9.3 bar. Then, based on the low-pressure compensation energy requirements of the unit's operation, the compressor frequency needs to be increased by 4 Hz. After stabilization, the low pressure is 7.5 bar, which meets the target low-pressure requirement, but the high-pressure value increases to 23.5 bar. At this point, the outdoor fan speed increases to 780 r / min. After stabilization, there is still room for further reduction in the compressor frequency and outdoor fan speed, failing to achieve true ultimate silence.

[0068] According to the silent operation control logic of the present invention, refer to Figure 1 As shown, the process is as follows:

[0069] Still assuming the silent mode is limited to a frequency of 65 Hz, the target low voltage range is 6-9 bar, and the target high voltage range is 19-23 bar;

[0070] In cooling mode, a silent operation command can be issued through DIP switch settings or other control methods. Upon receiving the silent operation command, the air conditioner controller will enter silent mode.

[0071] After the unit stabilizes based on the initial energy requirements, the compressor frequency is 60 Hz and the outdoor fan speed is 750 r / min. At this time, the system high pressure is 21 bar and the low pressure is 9.3 bar, exceeding the target low pressure range. Therefore, the compressor frequency is increased by 4 Hz. After stabilization, the unit's operating low pressure is detected as 7.5 bar ≤ 9 bar. The compressor frequency is then reduced by 1 Hz to 63 Hz. After stabilization, the unit's low pressure is 8.6 bar ≤ 9 bar. The compressor frequency is further reduced to 62 Hz. After stabilization, the low pressure is 9.2 bar > 9 bar. Therefore, the compressor frequency is no longer reduced and returns to the previous operating frequency of 63 Hz. After stabilization, the unit's operating high pressure is detected as 22.1 bar ≤ 23 bar, within the target high pressure range. The outdoor fan speed is then reduced by one level to 750 r / min. After stabilization, the high pressure is 22.8 bar ≤ 23 bar, still within the target high pressure range. The outdoor fan speed is further reduced by one level to 720 r / min. After stabilization, the low pressure is 23.2 bar. If the pressure bar exceeds 23 bar, exceeding the target high-pressure range, the outdoor fan speed will no longer be reduced, and will instead return to the previous setting of 750 r / min. After stable operation, the compressor frequency is 63 Hz and the outdoor fan speed is 750 r / min, meeting energy requirements. Both the low-pressure and high-pressure of the unit are close to the upper limit of the target range. Under these conditions, the compressor frequency and outdoor fan speed have been reduced as much as possible, further reducing the overall noise of the outdoor unit to near-silent operation.

[0072] Example 3

[0073] This embodiment describes an air conditioner, which includes a compressor, a fan, and a controller. The controller is used to implement the steps of the control method for silent operation of the air conditioner as described in Embodiment 1 or 2.

[0074] Example 4

[0075] This embodiment describes a computer-readable storage medium storing a computer program thereon. When the computer program is executed by a processor, it implements the control method for silent operation of an air conditioner as described in Embodiment 1 or 2.

[0076] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0077] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0078] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0079] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0080] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A control method for silent operation of an air conditioner, characterized by, include: When the unit is in cooling mode, in response to receiving a silent operation command, it performs the following silent control operations; The unit is operating at low pressure; compare it with the preset target low pressure range. If the unit's operating low pressure is within the target low pressure range, the compressor frequency is controlled to decrease sequentially at the set first gradient until the unit's operating low pressure after the compressor frequency decreases exceeds the upper limit of the target low pressure range. Then, the compressor is controlled to operate at the frequency after the last reduction adjustment, and the unit's operating high pressure after the compressor operates at this frequency is detected. The operating high voltage of the unit is compared with the preset target high voltage range: If the unit's operating high voltage is within the target high voltage range, the external fan speed is gradually reduced using the set second gradient until the unit's operating high voltage exceeds the upper limit of the target high voltage range after the external fan speed is reduced. Then, the external fan is controlled to operate at the speed adjusted in the previous reduction.

2. The control method for silent operation of an air conditioner according to claim 1, characterized in that, Also includes: When comparing the detected low operating pressure of the unit with the preset target low pressure range, if the low operating pressure of the unit exceeds the upper limit of the target low pressure range, the compressor frequency is gradually increased by a set third gradient until the low operating pressure of the unit after the compressor frequency is increased is within the target low pressure range.

3. The control method for silent operation of an air conditioner according to claim 1 or 2, characterized in that, Also includes: When comparing the detected unit operating high pressure with the preset target high pressure range, if the unit operating high pressure exceeds the upper limit of the target high pressure range, the external fan speed is gradually increased by a set fourth gradient until the unit operating high pressure after the external fan speed is increased is within the target high pressure range.

4. The control method of claim 2, wherein, The third gradient is greater than the first gradient.

5. The control method of claim 3, wherein, The fourth gradient is greater than or equal to the second gradient.

6. The control method for silent operation of an air conditioner according to claim 1, characterized in that, The detection of low operating pressure of the unit includes: after the unit receives a silent operation command and enters silent operation mode, waiting for the unit to stabilize for a set time before detecting the low operating pressure of the unit; The detection of the unit's operating high pressure after the compressor operates at this frequency includes: detecting the unit's operating high pressure after the unit has been running at the frequency set for a set stabilization time according to the previous frequency reduction adjustment.

7. The control method of the air conditioner for silent operation according to claim 1, wherein The step of successively controlling the compressor frequency to decrease according to a set first gradient until the unit's operating low pressure after the compressor frequency decreases exceeds the upper limit of the target low pressure range, and then controlling the compressor to operate at the frequency adjusted in the previous reduction, includes: S11, control the compressor frequency to decrease according to the first gradient, and after the unit has been running for a set stable time, determine whether the real-time low pressure of the unit exceeds the upper limit of the target low pressure range. If it exceeds, proceed to step S12; if it does not exceed, proceed to step S11. S12 controls the compressor to run at the frequency before the last reduction adjustment.

8. The control method of claim 1, wherein, The step of successively controlling the external fan speed to decrease according to a set second gradient until the unit's operating high pressure after the external fan speed decreases exceeds the upper limit of the target high pressure range, and then controlling the external fan to operate at the speed adjusted in the previous reduction includes: S21, control the speed of the external fan to decrease according to the second gradient. After the unit has been running for a set time, determine whether the real-time operating high pressure of the unit exceeds the upper limit of the target high pressure range. If it exceeds, proceed to step S22; if it does not exceed, proceed to step S21. S22 controls the external fan to run at the speed before the last speed reduction adjustment.

9. An air conditioner characterized by comprising: It includes a compressor, a fan, and a controller, wherein the controller is used to implement the steps of the control method for silent operation of an air conditioner as described in any one of claims 1-8.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, When the computer program is executed by the processor, it implements the control method for silent operation of the air conditioner as described in any one of claims 1-8.

Images