WO2021208650A1

WO2021208650A1 - Quiet operation control method for air conditioner

Info

Publication number: WO2021208650A1
Application number: PCT/CN2021/080349
Authority: WO
Inventors: 杨公增; 顾超
Original assignee: 青岛海尔空调电子有限公司; 海尔智家股份有限公司
Priority date: 2020-04-16
Filing date: 2021-03-12
Publication date: 2021-10-21
Also published as: CN111397144A; CN111397144B

Abstract

The present invention relates to the technical field of heat exchange devices, and in particular, to a quiet operation control method for an air conditioner. The present invention aims to solve the problem that the noise reduction effects of existing physical noise reduction methods are unsatisfactory and then it is difficult to achieve quiet operation of air conditioners. For this purpose, according to the quiet operation control method for an air conditioner of the present invention, a preset quiet operation pressure can be taken as a standard of comparison with a real-time system pressure of an air conditioner, so that the rotation speed of an outdoor fan of the air conditioner can be selectively reduced on the basis of a specific degree of difference between the current system pressure of the air conditioner and the preset quiet operation pressure, thereby avoiding operation of the air conditioner at a large fixed rotation speed of the outdoor fan in the whole process of cooling/heating, fundamentally eliminating most operation noise of the air conditioner, and achieving the purpose of quiet operation of the air conditioner.

Description

Silent operation control method of air conditioner

Technical field

The invention belongs to the technical field of heat exchange equipment, and specifically relates to a silent operation control method of an air conditioner.

Background technique

An air conditioner usually includes an indoor heat exchange part and an outdoor heat exchange part. A refrigerant circulates between the two heat exchange parts, and each heat exchange part is equipped with a fan to promote the indoor heat exchange part or the indoor heat exchange part through the rotation of the fan. The outdoor heat exchange part exchanges heat with the air. In this case, when the air conditioner is running for cooling/heating, the sound generated by the rotation of indoor or outdoor fans, the sound of refrigerant flow, and the sound of airflow entering or exiting from the grille all together cause the air conditioner to emit louder operating noise , Which seriously affects the user experience.

At present, most of the air conditioners block the noise of the air conditioner from being transmitted to the room by covering the sound absorbing material on the outside of the pipe or setting the installation position in the soundproof wall. However, the above physical noise reduction methods cannot fundamentally reduce the working noise of the air conditioner, but can only weaken the degree of noise transmission, and the noise reduction effect is not ideal.

Correspondingly, a new silent operation control method of an air conditioner is needed in the art to solve the above-mentioned problems.

Summary of the invention

In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the noise reduction effect of the existing physical noise reduction method is not ideal and it is difficult to realize the silent operation of the air conditioner, the present invention provides a silent operation control method of the air conditioner. The air conditioner includes a normal operation mode and a silent operation mode, the normal operation mode matches a normal system pressure, the silent operation mode matches a preset silent pressure, and the preset silent pressure is greater than the normal system pressure , The silent operation control method includes: obtaining the current system pressure of the air conditioner; comparing the current system pressure with the preset silent pressure; according to the comparison between the current system pressure and the preset silent pressure As a result, the rotation speed of the outdoor fan is selectively reduced so that the air conditioner is operated based on the silent operation mode.

In the preferred technical solution of the above-mentioned silent operation control method, the silent operation mode includes a silent gear, "according to the comparison result of the current system pressure and the preset silent pressure, the rotation speed of the outdoor fan is selectively reduced, so that The step of operating the air conditioner based on the silent operation mode" includes: if the current system pressure is less than the preset silent pressure, reducing the rotation speed of the outdoor fan, so as to adjust the current system pressure to the preset Silent pressure.

In the preferred technical solution of the above silent operation control method, "according to the comparison result of the current system pressure and the preset silent pressure, the rotation speed of the outdoor fan is selectively reduced, so that the air conditioner is based on the silent operation mode The step of "operating" also includes: if the current system pressure is greater than or equal to the preset silent pressure, not reducing the rotation speed of the outdoor fan, and allowing the air conditioner to operate at the current system pressure.

In the preferred technical solution of the above silent operation control method, the silent operation mode includes at least two silent gears, each of the silent gears is matched with a preset silent pressure, "the current system pressure is compared with The step of "comparing the preset mute pressure" includes: obtaining the preset mute pressure corresponding to the current mute level according to the current mute level; compare the current system pressure with the preset mute pressure corresponding to the current mute level "According to the comparison result of the current system pressure and the preset silent pressure, selectively reducing the outdoor fan speed so that the air conditioner operates based on the silent operation mode" includes: if the current system If the pressure is less than the preset mute pressure corresponding to the current mute gear, the rotation speed of the outdoor fan is reduced, so as to adjust the current system pressure to the preset mute pressure corresponding to the current mute gear.

In the preferred technical solution of the above silent operation control method, "according to the comparison result of the current system pressure and the preset silent pressure, the rotation speed of the outdoor fan is selectively reduced, so that the air conditioner operates based on the current silent operation mode The step also includes: if the current system pressure is greater than or equal to the preset mute pressure corresponding to the current mute gear, not reducing the rotation speed of the outdoor fan, and allowing the air conditioner to operate at the current system pressure.

In the preferred technical solution of the above-mentioned silent operation control method, "according to the comparison result of the current system pressure and the preset silent pressure, the rotation speed of the outdoor fan is selectively reduced, so that the air conditioner is operated based on the silent operation. After the step of "mode operation", the silent operation control method further includes: obtaining the current unit operating load of the air conditioner after a preset time; determining the numerical range in which the current unit operating load is located; and according to the current unit Selectively correct the system pressure of the air conditioner in the numerical interval where the operating load is located.

In the preferred technical solution of the above silent operation control method, the step of "selectively correcting the system pressure of the air conditioner according to the numerical interval in which the current unit operating load is located" includes: if the current unit operating load is greater than or equal to The first preset load is to reduce the system pressure of the air conditioner from the system pressure corresponding to the silent gear to the normal system pressure, wherein the first preset load is greater than that of the air conditioner Current budget load.

In the preferred technical solution of the above silent operation control method, the step of "selectively correcting the system pressure of the air conditioner according to the numerical interval in which the current unit operating load is located" further includes: if the current unit operating load is less than For the first preset load, the system pressure of the air conditioner is not adjusted.

In the preferred technical solution of the above silent operation control method, the step of "selectively correcting the system pressure of the air conditioner according to the numerical interval in which the current unit operating load is located" includes: if the current unit operating load is greater than or equal to The first preset load is to reduce the system pressure of the air conditioner from the system pressure corresponding to the current silent gear to the regular system pressure, wherein the first preset load is greater than the current air conditioner Budget load.

In the preferred technical solution of the above silent operation control method, the step of "selectively correcting the system pressure of the air conditioner according to the numerical interval in which the current unit operating load is located" further includes: if the current unit operating load is less than If the first preset load is greater than the second preset load, the system pressure of the air conditioner is not adjusted, wherein the second preset load is less than the current budget load.

Those skilled in the art can understand that the silent operation control method of the air conditioner of the present invention can use the preset silent pressure as the comparison standard of the real-time system pressure of the air conditioner, so as to be based on the specific difference between the current system pressure and the preset silent pressure. The speed of the outdoor fan of the air conditioner can be selectively reduced to prevent the air conditioner from running at a fixed larger outdoor fan speed during the cooling/heating process. This eliminates most of the air conditioner’s operating noise from the root cause and achieves The purpose of making the air conditioner operate silently.

Preferably, during the silent operation of the air conditioner, the silent operation control method of the air conditioner of the present invention can also selectively correct the system pressure of the air conditioner based on the current unit operating load of the air conditioner, so that the air conditioner operates in silent operation. At the same time, it can also ensure that the air conditioner has a good cooling/heating effect, and improve its silent operation effect as much as possible on the basis of the normal operation of the air conditioner, so as to share the two aspects of heating/cooling efficiency and low-noise operation Improve the operating performance of the air conditioner.

Description of the drawings

The preferred embodiments of the present invention will be described below with reference to the drawings. The attached picture is:

Figure 1 is a flow chart of the main steps of the silent operation control method of the air conditioner of the present invention;

Fig. 2 is a detailed step flowchart of a preferred embodiment of the silent operation control method of the air conditioner of the present invention.

Detailed ways

First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific applications. For example, although the silent operation control method of the present invention is described in conjunction with an air conditioner, this is not a limitation. Other heat exchange equipment with similar silent operation requirements can also run the silent operation control method of the present invention, such as heat exchange. Type water heater, heat exchange type dehumidifier, etc.

Secondly, it should be noted that in the description of the present invention, although the various steps of the control method of the present invention are described in a specific order in this application, these orders are not restrictive and do not deviate from the basic principles of the present invention. Under the premise, those skilled in the art can perform the steps in a different order.

Based on the problems that the existing physical noise reduction methods have unsatisfactory noise reduction effects and are difficult to achieve silent operation of air conditioners as pointed out in the background art, the present invention provides a silent operation control method of air conditioners, which aims to eliminate air conditioners from the root cause. Most of the operating noise of the air conditioner achieves the purpose of quiet operation of the air conditioner.

Generally, the air conditioner is set with a fixed system pressure that can meet the normal operation requirements of the air conditioner during operation. When the air conditioner is running, the actual system pressure is adjusted in real time with reference to the fixed system pressure, so that the actual system pressure is always close to (or equal to) the above fixed system pressure, so as to ensure the normal operation of the air conditioner.

The air conditioner of the present invention includes a normal operation mode and a silent operation mode, wherein the normal operation mode matches the normal system pressure, and the normal system pressure is equivalent to the fixed system pressure conventionally set by the above-mentioned air conditioner. The silent operation mode matches the preset silent pressure, which is a set pressure value greater than the normal system pressure.

First, refer to FIG. 1. FIG. 1 is a flowchart of the main steps of the silent operation control method of the air conditioner of the present invention. As shown in Figure 1, the silent operation control method of the air conditioner of the present invention includes:

Step S1: Obtain the current system pressure of the air conditioner;

Step S2: Compare the current system pressure with the preset silent pressure;

Step S3: According to the comparison result of the current system pressure and the preset silent pressure, the rotation speed of the outdoor fan is selectively reduced, so that the air conditioner operates based on the silent operation mode.

In the above step S2, the preset silent pressure is a set critical pressure value used to divide the normal operation mode and the silent operation mode of the air conditioner. When the air conditioner is in the normal operation mode, the actual system pressure of the air conditioner is continuously adjusted to the direction close to the normal system pressure, and is always below the critical pressure value; when the air conditioner is in the silent operation mode, the air conditioner’s pressure The actual system pressure is continuously adjusted to the direction close to the preset mute pressure, and is never lower than the critical pressure value.

In step S3, given that the system pressure of the air conditioner is closely related to the speed of the outdoor fan, specifically: when the speed of the outdoor fan decreases, the degree of airflow on the outdoor side decreases, and the heat exchange efficiency of the outdoor heat exchanger of the air conditioner decreases, Therefore, the conversion amount (such as the amount of liquefaction) of the refrigerant in the outdoor heat exchanger per unit time is reduced, thereby increasing the system pressure of the air conditioner. Therefore, if the value of the system pressure set by the air conditioner is larger, the rotation speed of the outdoor fan running when the air conditioner approaches the system pressure will be higher.

In this case, by comparing the current system pressure with the preset mute pressure, it is possible to confirm the magnitude of the numerical difference between the current system pressure and the preset mute pressure. This value difference is used to selectively reduce the speed of the outdoor fan, which can ensure that the actual system pressure of the air conditioner is not lower than the preset mute pressure and is in the range of the system pressure corresponding to the mute operation mode (that is, greater than or equal to the preset mute pressure) , So as to ensure that the air conditioner is in a silent operation mode, and avoid the air conditioner running at a large outdoor fan speed to produce obvious operating noise.

In the above steps S1 to S3, by comparing the current system pressure of the air conditioner with the preset mute pressure, the adjustment requirement of the outdoor fan speed of the air conditioner can be determined, so as to continuously compare the system pressure of the air conditioner to the preset mute pressure. Adjust so that the outdoor fan speed of the air conditioner is always in a lower rotation range, achieving the purpose of making the air conditioner operate silently.

In the above embodiment, it should be noted that the above conventional system pressure and the above silent preset pressure are not limited. Those skilled in the art can determine the above conventional system pressure according to the functional parameters of the air conditioner, the actual operating requirements of the air conditioner, etc. Set the specific value of the preset mute pressure.

In a preferred embodiment, the above-mentioned silent operation mode includes at least two silent gear positions, and each silent gear position is matched with a preset silent pressure. For example, the above-mentioned silent operation mode includes a first-level silent gear and a second-order silent gear that has a stronger mute effect than the first-order silent gear. The preset mute pressure P1 corresponding to the first-class silent gear is greater than the normal system pressure P0 and less than The preset mute pressure P2 corresponding to the second mute gear. From the first mute gear to the second mute gear, the mute effect becomes stronger. When the air conditioner is running, the specific mute position in the mute operation mode can be selected according to the actual mute requirements.

In this case, the above step S2 specifically includes:

Obtain the preset mute pressure corresponding to the current mute level according to the current mute level;

Compare the current system pressure with the preset mute pressure corresponding to the current mute gear;

In the above steps, since the current mute position is determined according to the current actual mute demand of the air conditioner, such as the user setting or the default mute position in the silent operation mode set in the air conditioner system, the air conditioner starts every time The current mute position during mute operation is determined, so the corresponding preset mute pressure is also determined. In this case, when running the above steps, you only need to directly call the currently matched preset mute pressure.

The above step S3 specifically includes:

If the current system pressure is lower than the preset mute pressure corresponding to the current mute gear, the outdoor fan speed is reduced to adjust the current system pressure to the preset mute pressure corresponding to the current mute gear.

In the above steps, when the air conditioner is in any silent position of the silent operation mode, the current actual system pressure of the air conditioner needs to be selectively adjusted with the preset silent pressure in the silent position.

Taking the current mute gear as the first-level silent gear as an example, when the current system pressure is less than the preset mute pressure P1 corresponding to the first-level silent gear, it means that the current system pressure is not in the system pressure range corresponding to the first-level silent gear [ P1, P2) do not meet the operating standards of the first-level silent gear. Therefore, the rotation speed of the outdoor fan is reduced to increase the current system pressure, and prompt the current system pressure to approach the preset silent pressure P1, thereby falling within the system pressure interval corresponding to the first-level silent gear.

Further, the above step S3 also includes:

If the current system pressure is greater than or equal to the preset mute pressure corresponding to the current mute gear, the rotation speed of the outdoor fan is not reduced, and the air conditioner is operated at the current system pressure.

Continue to take the current operating gear as the first-level silent gear as an example. In the above steps, when the current system pressure is not less than the preset silent pressure P1, it indicates that the mute effect of the air conditioner during current operation is at least not weaker than the first-level silent gear. The mute effect of the position can meet the mute requirements corresponding to the first-level mute gear, so there is no need to reduce the outdoor fan speed to adjust the value of the current system pressure at this time.

In a possible implementation manner, the silent operation mode includes only one silent gear, that is, the silent operation mode only matches a preset silent pressure, and the air conditioner corresponds to only one silent effect in the silent operation mode.

In this case, the above step S3 specifically includes:

If the current system pressure is less than the preset mute pressure, the outdoor fan speed is reduced to adjust the current system pressure to the preset mute pressure.

Further, the above step S3 also includes:

If the current system pressure is greater than or equal to the preset silent pressure, the speed of the outdoor fan will not be reduced, and the air conditioner will maintain the current system pressure.

Preferably, after step S3, the silent operation control method of the air conditioner of the present invention further includes:

After the preset time, obtain the current unit operating load of the air conditioner;

Determine the numerical range of the current unit operating load;

Selectively correct the system pressure of the air conditioner according to the numerical range of the current unit operating load.

In the above steps, the difference between the current unit operating effect of the air conditioner and the actual operating demand can be determined through the numerical interval where the current unit operating load of the air conditioner is located. Correcting the system pressure of the air conditioner based on this difference can prevent the air conditioner from degrading the operating effect due to the pursuit of a silent effect.

Exemplarily, the aforementioned preset time may be set to 5 minutes.

In a preferred embodiment, the silent operation mode is the above-mentioned situation including at least two silent gears, each silent gear is matched with a preset silent pressure,

The steps of "selectively correcting the system pressure of the air conditioner according to the numerical range of the current unit operating load" include:

If the current unit operating load is greater than or equal to the first preset load, the system pressure of the air conditioner is reduced from the system pressure corresponding to the current silent gear to the regular system pressure, where the first preset load is greater than the current budget load of the air conditioner.

In the above steps, the "current budget load" is the pre-calculated operating load of the air conditioner in the current operating environment that exactly matches the current heating/cooling demand. The "first preset load" is the set operating load that is greater than the above-mentioned current budget load. When the current operating load of the unit is greater than the first preset load, it indicates that the current operating load of the air conditioner is too large, and the electronic components of the air conditioner generate a large amount of heat. The cooling capacity of the large air conditioner. In view of this, when the current unit operating load is greater than or equal to the first preset load, the system pressure of the air conditioner is changed from the system pressure corresponding to the current silent gear (that is, the system pressure value within the pressure interval corresponding to the current silent gear) ) Decrease to the normal system pressure, make the air conditioner run close to the normal system pressure, exit the silent operation mode and enter the normal operation mode.

Further, the above-mentioned step of "selectively correcting the system pressure of the air conditioner according to the numerical interval in which the current unit operating load is located" further includes:

If the current unit operating load is less than the first preset load and greater than the second preset load, the system pressure of the air conditioner is not adjusted, where,

The second preset load is less than the current budget load.

In the above steps, the "second preset load" is a set operating load that is less than the above-mentioned current budget load. When the current unit operating load is between the first preset load and the second preset load, the current unit operating load of the surface air conditioner does not exceed the normal operating range, and the current change trend of the unit operating load is within the expected reasonable range. At this time, the system pressure value of the air conditioner is not adjusted, and the cooling/cooling effect of the air conditioner and the silent effect are balanced.

Furthermore, the step of "selectively correcting the system pressure of the air conditioner according to the numerical range of the current unit operating load" also includes:

If the current unit operating load is less than or equal to the second preset load, and the current silent gear has an advanced silent gear, the system pressure of the air conditioner will be increased from the system pressure corresponding to the current silent gear to the preset corresponding to the advanced silent gear Silent pressure.

In the above steps, the "advanced mute gear" specifically refers to a mute gear that has a stronger mute effect than the current mute gear. For example, in the case that the silent operation mode includes a first-level silent gear and a second-order silent gear, if the current silent gear is a first-class silent gear, the current silent gear has an advanced silent gear with a stronger mute effect— —That is, the second-level mute gear. If the current mute gear is a secondary mute gear, the current mute gear does not have an advanced mute gear.

When the current unit operating load is less than or equal to the second preset load, it indicates that the heat generation of the electronic components of the air conditioner is very small at this time, so even if the cooling capacity of the air conditioner is reduced, the normal operation of the air conditioner will not be affected. At this time, when the silent gear can be further improved, the current system pressure of the air conditioner can be adjusted to the preset silent pressure corresponding to the advanced silent gear by reducing the speed of the outdoor fan, so as to further optimize the current air conditioner The silent operation effect of the, enables users to get a better noise reduction experience.

As an example, in the case where the silent operation mode includes the first-level silent gear and the second-order silent gear, the first preset load can be set to 1.2 times the current budget load, and the second preset load can be set to 0.5 Times the current budget load. Of course, in practical applications, those skilled in the art can adjust the size of the first preset load and the second preset load according to the performance parameters of the air conditioner and the actual mute demand. In addition, although the foregoing embodiment is described in conjunction with the two preset load parameters of the first preset coincidence and the second preset load, this is not a limitation. In the case of a large number of silent gears, those skilled in the art can also set more preset loads to refine the numerical range of the current unit operating load.

In a possible implementation manner, in the case that the silent operation mode includes only one silent gear, the above-mentioned step of "selectively correcting the system pressure of the air conditioner according to the numerical range of the current unit operating load" includes:

If the current unit operating load is greater than or equal to the first preset load, the system pressure of the air conditioner is reduced from the system pressure corresponding to the silent gear to the normal system pressure.

Further, the above-mentioned step of "selectively correcting the system pressure of the air conditioner according to the numerical range of the current unit operating load" also includes:

If the current unit operating load is less than the first preset load, the system pressure of the air conditioner is not adjusted.

Next, continue to refer to FIG. 2, which is a detailed step flowchart of a preferred embodiment of the silent operation control method of the air conditioner of the present invention. As shown in Figure 2, in the case that the silent operation mode includes the first-level silent gear and the second-order silent gear, when the user selects any silent gear of the air conditioner to confirm, the silent operation control method of the air conditioner of the present invention The preferred embodiment specifically includes the following steps:

Step S100: Obtain the current system pressure of the air conditioner;

Step S101: Determine whether the current system pressure is less than the preset mute pressure corresponding to the current mute gear;

If the current system pressure is less than the preset mute pressure corresponding to the current mute gear, perform step S102; otherwise, perform step S103;

Step S102: Decrease the rotation speed of the outdoor fan, so as to adjust the current system pressure to the preset mute pressure corresponding to the current mute gear;

Step S103: Make the air conditioner operate at the current system pressure;

Step S104: After a preset time, obtain the current unit operating load of the air conditioner;

Step S105: Determine the numerical interval in which the current unit operating load Q is located;

If Q≥Q1, go to step S106, if Q2<Q<Q1, go to step S107; if Q≤Q2, go to step S108;

Step S106: Decrease the system pressure of the air conditioner from the system pressure corresponding to the current silent gear to the regular system pressure;

Step S107: Do not adjust the system pressure of the air conditioner;

Step S108: Determine whether the current mute gear is the first-level mute gear, that is, whether there is an advanced mute gear (the second-level mute gear);

If the current mute gear is the first-level mute gear, execute step S109; otherwise, execute step S107;

Step S109: Increase the system pressure of the air conditioner from the system pressure corresponding to the first-level silent position to the preset silent pressure corresponding to the second-order silent position.

Those skilled in the art need to understand that, although the silent operation control method of the present invention only combines one or two silent gears for illustration, this is not a limitation. In fact, those skilled in the art can base on the silent effect The division needs to improve the number of silent gears, such as setting the silent gears to four.

In summary, the silent operation control method of the air conditioner of the present invention can use the preset silent pressure as the comparison standard of the real-time system pressure of the air conditioner, so as to be based on the specific difference between the current system pressure of the air conditioner and the preset silent pressure To selectively reduce the speed of the outdoor fan of the air conditioner, so as to prevent the air conditioner from running at a fixed larger outdoor fan speed during the cooling/heating process. The purpose of silent operation of the air conditioner. On this basis, the silent operation control method of the present invention can also intermittently modify the system pressure based on the operating load of the unit, so as to ensure the operating efficiency and silent effect of the air conditioner at the same time, and optimize the silent effect as much as possible.

So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

A silent operation control method of an air conditioner, characterized in that the air conditioner includes a normal operation mode and a silent operation mode, the normal operation mode matches the normal system pressure, and the silent operation mode corresponds to the preset silent pressure. Matching, the preset silent pressure is greater than the regular system pressure,

The silent operation control method includes:

Acquiring the current system pressure of the air conditioner;

Comparing the current system pressure with the preset silent pressure;

According to the comparison result of the current system pressure and the preset silent pressure, the rotation speed of the outdoor fan is selectively reduced, so that the air conditioner operates based on the silent operation mode.
The silent operation control method according to claim 1, wherein the silent operation mode includes a silent gear position,

The step of "selectively reducing the rotation speed of the outdoor fan according to the comparison result of the current system pressure and the preset silent pressure so that the air conditioner operates based on the silent operation mode" includes:

If the current system pressure is less than the preset mute pressure, the rotation speed of the outdoor fan is reduced, so as to adjust the current system pressure to the preset mute pressure.
The silent operation control method according to claim 2, characterized in that, "according to the comparison result of the current system pressure and the preset silent pressure, the rotation speed of the outdoor fan is selectively reduced, so that the air conditioner is based on the The steps described in the silent operation mode" also include:

If the current system pressure is greater than or equal to the preset silent pressure, the rotation speed of the outdoor fan is not reduced, and the air conditioner is maintained to operate at the current system pressure.
The silent operation control method according to claim 1, wherein:

The silent operation mode includes at least two silent gear positions, each of the silent gear positions is matched with a preset silent pressure,

The steps of "compare the current system pressure with the preset silent pressure" include:

Obtain the preset mute pressure corresponding to the current mute level according to the current mute level;

Comparing the current system pressure with the preset mute pressure corresponding to the current mute gear;

The step of "selectively reducing the rotation speed of the outdoor fan according to the comparison result of the current system pressure and the preset silent pressure so that the air conditioner operates based on the silent operation mode" includes:

If the current system pressure is less than the preset mute pressure corresponding to the current mute gear, the rotation speed of the outdoor fan is reduced, so as to adjust the current system pressure to the preset mute pressure corresponding to the current mute gear.
The silent operation control method according to claim 4, wherein:

The step of "selectively reducing the rotation speed of the outdoor fan according to the comparison result of the current system pressure and the preset silent pressure so that the air conditioner operates based on the current silent operation mode" also includes:

If the current system pressure is greater than or equal to the preset mute pressure corresponding to the current mute gear, the rotation speed of the outdoor fan is not reduced, and the air conditioner is operated to maintain the current system pressure.
The silent operation control method according to any one of claims 1 to 5, characterized in that, “according to the comparison result of the current system pressure and the preset silent pressure, the speed of the outdoor fan is selectively reduced so that After the step of operating the air conditioner based on the silent operation mode", the silent operation control method further includes:

After a preset time, obtain the current unit operating load of the air conditioner;

Determine the numerical interval in which the current unit operating load is located;

The system pressure of the air conditioner is selectively corrected according to the numerical interval in which the current unit operating load is located.
The silent operation control method according to claim 6 which refers to any one of claims 1 to 3, characterized in that "the system of the air conditioner is selectively modified according to the numerical interval in which the current unit operating load is located. The steps of "stress" include:

If the current unit operating load is greater than or equal to the first preset load, then the system pressure of the air conditioner is reduced from the system pressure corresponding to the silent gear to the normal system pressure,

Wherein, the first preset load is greater than the current budget load of the air conditioner.
The silent operation control method according to claim 7, wherein:

The step of "selectively correcting the system pressure of the air conditioner according to the numerical interval in which the current unit operating load is located" also includes:

If the current unit operating load is less than the first preset load, the system pressure of the air conditioner is not adjusted.
The silent operation control method according to claim 6 referring to any one of claims 1, 4, and 5, characterized in that "the air conditioner is selectively modified according to the numerical interval in which the current unit operating load is located. The steps of "system pressure" include:

If the current unit operating load is greater than or equal to the first preset load, then the system pressure of the air conditioner is reduced from the system pressure corresponding to the current silent gear to the regular system pressure,

Wherein, the first preset load is greater than the current budget load of the air conditioner.
The silent operation control method according to claim 9, wherein:

The step of "selectively correcting the system pressure of the air conditioner according to the numerical interval in which the current unit operating load is located" also includes:

If the current unit operating load is less than the first preset load and greater than the second preset load, the system pressure of the air conditioner is not adjusted,

Wherein, the second preset load is less than the current budget load.