CN110131860B

CN110131860B - Control method for controlling operation of air conditioner and air conditioner

Info

Publication number: CN110131860B
Application number: CN201910423868.5A
Authority: CN
Inventors: 曾庆和; 彭裕辉; 曾俊杰; 金海元; 陈圣文
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2016-10-20
Filing date: 2016-10-20
Publication date: 2020-09-29
Anticipated expiration: 2036-10-20
Also published as: CN106440227A; CN106440227B; CN110131860A

Abstract

The invention relates to a control method for controlling the operation of an air conditioner and an air conditioner. According to an aspect of the present invention, there is provided a control method for controlling an operation of an Air Conditioner (AC). The air conditioner comprises an indoor unit (10) which is provided with a first air outlet (20) and a second air outlet (30), and further comprises a compressor (80) and an expansion valve (84) which form part of an air conditioner circulation loop. The control method comprises the following control steps: adjusting an operation of the compressor and/or an operation of the expansion valve according to an operation mode of the air conditioner and according to an ambient temperature and/or an operation parameter of the air conditioner when one of the first outlet port and the second outlet port is closed or reduced in opening degree during an operation of the air conditioner. According to the invention, the air conditioning system can be effectively controlled, the fluctuation of the whole system can be optimized, and the reliability problem can be solved.

Description

Control method for controlling operation of air conditioner and air conditioner

The application is as follows: the invention is a divisional application of an invention patent application with the filing date of 2016, 10 and 20, and the application number of CN201610916888.2, entitled "control method for controlling operation of air conditioner and air conditioner".

Technical Field

The invention relates to the field of air conditioners, in particular to a control method for controlling the operation of an air conditioner and an associated air conditioner, wherein the control method can optimize the operation of an air conditioning system.

Background

Currently, the indoor unit of an air conditioner (in particular the indoor unit of a cabinet air conditioner) can be provided with two air outlets, for example an upper air outlet and a lower air outlet. The upper and lower outlets may be opened, closed or opened independently of each other by respective damper opening and closing devices. During the normal operation of the air conditioner, when one of the upper and lower air outlets is closed or is reduced in opening degree (for example, the lower air outlet is closed in a cooling mode to prevent cold air from directly blowing to a human body), the air volume of the whole air conditioner is affected, and thus the operation stability of the air conditioner system is greatly affected.

It should be noted here that the technical contents provided in this section are intended to assist those skilled in the art in understanding the present invention, and do not necessarily constitute prior art.

Disclosure of Invention

In order to solve or partially solve at least one of the above problems in the related art, the present invention provides a control method for controlling the operation of an air conditioner and an associated air conditioner, thereby enabling effective control of an air conditioning system so as to enable optimization of overall system fluctuation and solving of reliability problems.

According to an aspect of the present invention, there is provided a control method for controlling an operation of an air conditioner. The air conditioner comprises an indoor unit, wherein the indoor unit is provided with a first air outlet and a second air outlet, and the air conditioner further comprises a compressor and an expansion valve which form part of an air conditioner circulation loop. The control method comprises the following control steps: adjusting an operation of the compressor and/or an operation of the expansion valve according to an operation mode of the air conditioner and according to an ambient temperature and/or an operation parameter of the air conditioner when one of the first outlet port and the second outlet port is closed or reduced in opening degree during an operation of the air conditioner.

Preferably, in the above control method, the air conditioner is a cabinet air conditioner, and the first air outlet is an upper air outlet and the second air outlet is a lower air outlet.

Preferably, in the above control method, one of the first outlet and the second outlet that is closed or reduced in opening degree is a lower outlet.

Preferably, in the above control method: setting a series of preset indoor temperatures, and the controlling step further comprises: and comparing the indoor temperature with the series of preset indoor temperatures, and determining the adjustment of the working frequency of the compressor according to the comparison result, so that the working frequency of the compressor is smaller when the indoor temperature is higher.

Preferably, in the above control method: the series of preset indoor temperatures include a first preset indoor temperature, a second preset indoor temperature smaller than the first preset indoor temperature, and a third preset indoor temperature smaller than the second preset indoor temperature, and the control step further comprises: when the indoor temperature is greater than or equal to the first preset indoor temperature, the working frequency of the compressor is reduced by a first reduction value from the current working frequency, when the indoor temperature is less than the first preset indoor temperature and greater than or equal to the second preset indoor temperature, the working frequency of the compressor is reduced by a second reduction value from the current working frequency, when the indoor temperature is less than the second preset indoor temperature and greater than or equal to the third preset indoor temperature, the working frequency of the compressor is reduced by a third reduction value from the current working frequency, and when the indoor temperature is less than the third preset indoor temperature, the compressor is maintained at the current working frequency, wherein the first reduction value is greater than the second reduction value and the second reduction value is less than the third reduction value.

Preferably, in the above control method, the first preset indoor temperature is 24 degrees celsius, the second preset indoor temperature is 20 degrees celsius, and the third preset indoor temperature is 15 degrees celsius.

Preferably, in the control method described above, the first reduction value is in the range of 15HZ to 25HZ, the second reduction value is in the range of 11HZ to 21HZ, and the third reduction value is in the range of 3HZ to 13 HZ.

Preferably, in the control method, the first reduction value is 20HZ, the second reduction value is 16HZ, and the third reduction value is 8 HZ.

Preferably, in the above control method: the indoor unit includes an indoor fan having a plurality of dampers, the compressor has a plurality of normal operating frequency ranges one-to-one corresponding to the plurality of dampers of the indoor fan, and the decrease in the operating frequency of the compressor is: a reduction in an upper limit of a normal operating frequency range corresponding to a current windshield of the indoor fan.

Preferably, in the above control method: the air conditioner further includes a controller that controls operation of the air conditioner, and the controlling step further includes: the controller, upon receiving a signal that one of the first outlet vent and the second outlet vent is to be closed or reduced in opening degree, issues an instruction to adjust operation of the compressor and/or operation of the expansion valve according to an operation mode of the air conditioner and according to an ambient temperature and/or an operation parameter of the air conditioner, and, at the same time as or after completion of the adjustment of the operation of the compressor and/or the adjustment of the operation of the expansion valve, causes one of the first outlet vent and the second outlet vent to be closed or reduced in opening degree.

According to another aspect of the present invention, an air conditioner is provided. The air conditioner includes an air conditioner circulation circuit and a controller controlling an operation of the air conditioner. The controller controls the operation of the air conditioner according to the control method as described above.

According to the present invention, when one of the first and second outlets is closed or reduced in opening degree during operation of the air conditioner, the operation of the compressor and/or the operation of the expansion valve are adjusted according to the operation mode of the air conditioner and according to the ambient temperature and/or the operation parameters of the air conditioner. Therefore, when the air conditioner works in a low-load refrigeration mode, the running fluctuation of the air conditioning system caused by insufficient superheat degree or even larger superheat degree at the bottom of the compressor can be avoided, and when the air conditioner works in a heating mode, the running fluctuation of the air conditioning system caused by overload shutdown or overhigh temperature and pressure of an inner pipe can be avoided, so that the air conditioning system can be effectively controlled, the fluctuation of the whole system can be optimized, and the reliability problem can be solved.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is a block diagram illustrating a structure of an air conditioner according to the present invention;

fig. 2 is a longitudinal sectional view of an indoor unit according to the present invention in a front-rear direction;

fig. 3 is a flowchart of a control method according to a first exemplary embodiment of the invention; and

fig. 4 is a flowchart of a control method according to a second exemplary embodiment of the present invention.

List of reference numerals:

10-indoor unit

20- -first outlet

30- -second outlet

40-indoor fan

80-compressor

82- -condenser

84- -expansion valve

86-evaporator

AC-air conditioner

CT-controller

Detailed Description

The invention is described in detail below with the aid of exemplary embodiments with reference to the attached drawings. The following detailed description of the invention is merely for purposes of illustration and is in no way intended to limit the invention, its application, or uses.

Referring to fig. 1 (fig. 1 is a block diagram illustrating the structure of an air conditioner according to the present invention), an air conditioner AC according to the present invention may include an air conditioner circulation circuit and a controller CT controlling the operation of the air conditioner AC.

The air conditioner circulation circuit includes: a compressor 80, a condenser 82, an expansion valve 84, and an evaporator 86.

The air conditioner AC may be further divided into an indoor unit section and an outdoor unit section. An evaporator 86 (indoor heat exchanger) may be disposed in the indoor unit 10, and a compressor 80, a condenser 82 (outdoor heat exchanger), and an expansion valve 84 may be disposed in the outdoor unit. In some examples, the controller CT may be incorporated in the indoor unit 10.

Referring to fig. 2 (fig. 2 is a longitudinal sectional view of the indoor unit according to the present invention in a front-rear direction), the indoor unit 10 may include an indoor fan 40, and may be provided with a first outlet 20 and a second outlet 30. In the illustrated example, the air conditioner AC is a cabinet air conditioner, and the first outlet 20 is an upper outlet and the second outlet 30 is a lower outlet. However, it should be understood that the air conditioner according to the present invention is not limited to the cabinet air conditioner but may be other air conditioners provided with a plurality of outlets, and the arrangement of the outlets is not limited to the arrangement of the upper and lower outlets but may be other suitable arrangements (for example, a middle-lower arrangement or a left-right arrangement).

During the operation of the air conditioner AC, it is sometimes necessary to close one of the upper and lower outlets or reduce the opening degree. For example, in order to avoid discomfort of a user caused by cold air or hot air directly blowing to a human body, the lower air outlet may be temporarily closed or the opening degree may be reduced. When one air outlet of the upper air outlet and the lower air outlet is closed or the opening degree of the air outlet is reduced, the air volume of the whole air conditioner is influenced, and the operation stability of the air conditioner system is greatly influenced. In some examples, the lower air outlet device may be provided at a rotating chassis of the indoor cabinet, and the lower air outlet device may be provided with a damper that is slidable up and down through a rack and pinion mechanism so as to enable opening, closing, or opening adjustment of the lower air outlet. The lower air outlet device is also provided with a rubber sealing element so as to play an effective sealing role when the lower air outlet is closed.

In view of the above-described operational stability problems of the air conditioner system, according to the present invention, there is provided a control method for controlling the operation of an air conditioner AC. The control method may include the control steps of: during operation of the air conditioner AC, when one of the first and

second outlets

20 and 30 is closed or reduced in opening degree, the operation of the compressor 80 and/or the operation of the expansion valve 84 are adjusted according to the operation mode of the air conditioner AC and according to the ambient temperature and/or the operation parameters of the air conditioner AC. The operation mode of the air conditioner AC may include a cooling mode and a heating mode. The ambient temperature may include an outdoor temperature and an indoor temperature. The operating parameters of air conditioner AC may include the discharge temperature of compressor 80 and other suitable operating parameters (e.g., operating parameters that reflect the compressor in a low load cooling condition). These other operating parameters include, for example: compressor discharge pressure, condenser condensing temperature, and evaporator evaporating temperature.

In a preferred example, when the second outlet vent 30, which is the lower outlet vent, is closed or reduced in opening degree (particularly, closed), the operation of the compressor 80 and/or the operation of the expansion valve 84 is adjusted.

Referring to fig. 3 (fig. 3 is a flowchart of a control method according to a first exemplary embodiment of the present invention), the control method according to the first exemplary embodiment of the present invention involves: when the air conditioner AC is operated in the cooling mode, if the outdoor temperature is less than or equal to the preset outdoor temperature and/or the discharge temperature of the compressor 80 is less than or equal to the preset discharge temperature, the operation opening degree of the expansion valve 84 is decreased.

Specifically, in step S01, the controller CT determines whether one of the first outlet port 20 and the second outlet port 30 is closed or reduced in opening degree based on the relevant signal (e.g., a signal from a damper switch sensor). If the determination result is yes, the control routine proceeds to step S02, and if the determination result is no, the control routine ends.

In step S02, the controller CT obtains the outdoor temperature based on the relevant signal (e.g., the signal from the outdoor temperature sensor), and determines whether the outdoor temperature is less than or equal to the preset outdoor temperature by comparing the outdoor temperature with the preset outdoor temperature that is set and stored in advance. If the determination result is yes, the control routine proceeds to step S03, and if the determination result is no, the control routine ends.

In step S03, the controller CT obtains the discharge temperature based on the relevant signal (e.g., the signal from the compressor discharge temperature sensor), and determines whether the discharge temperature is less than or equal to a preset discharge temperature by comparing the discharge temperature with a preset discharge temperature that is set and stored in advance. If the determination result is yes, the control routine proceeds to step S04, and if the determination result is no, the control routine ends.

In step S04, the controller CT issues a control command to the expansion valve 84 to decrease the operating opening degree of the expansion valve 84, and the control routine of the present cycle ends.

Here, when, for example, the lower outlet is reopened, the controller CT returns the expansion valve 84 to the original opening degree. In addition, it may be: the control routine is not always performed continuously but, for example, at predetermined time intervals.

Here, it should be noted that although in the control method of the first exemplary embodiment shown in fig. 3, the controller CT issues a control command to the expansion valve 84 to reduce the operating opening degree of the expansion valve 84 when the outdoor temperature is less than or equal to the preset outdoor temperature and the discharge temperature of the compressor 80 is less than or equal to the preset discharge temperature, it may be: when the outdoor temperature is less than or equal to the preset outdoor temperature or the discharge temperature of the compressor 80 is less than or equal to the preset discharge temperature, the controller CT sends a control command to the expansion valve 84 to reduce the operating opening degree of the expansion valve 84.

The preset outdoor temperature may be in a range of 20 to 30 degrees celsius, preferably 23 to 27 degrees celsius, and more preferably 25 degrees celsius.

The preset exhaust temperature may be in the range of 30 to 46 degrees celsius, preferably 34 to 42 degrees celsius, and more preferably 38 degrees celsius.

In a preferred example, the expansion valve 84 is an electronic expansion valve that includes a stepper motor. Thereby, the operating opening degree of the expansion valve 84 can be reduced by reducing the number of steps (adjustment value) of the stepping motor.

The number of steps of the stepping motor may be reduced by thirty-five steps to sixty-five steps, preferably by forty-five steps to fifty-five steps, more preferably by fifty steps.

In a particularly preferred example, the number of steps of the stepping motor is reduced by fifty steps when the outdoor temperature is less than or equal to 25 degrees celsius and the discharge temperature of the compressor 80 is less than or equal to 38 degrees celsius.

Referring to fig. 4 (fig. 4 is a flowchart of a control method according to a second exemplary embodiment of the present invention), the control method according to the second exemplary embodiment of the present invention involves: when the air conditioner AC operates in the heating mode, the operating frequency of the compressor 80 is adjusted according to the indoor temperature.

Specifically, in step S11, the controller CT determines whether one of the first outlet port 20 and the second outlet port 30 is closed or reduced in opening degree based on the relevant signal (e.g., a signal from a damper switch sensor). If the determination result is yes, the control routine proceeds to step S12, and if the determination result is no, the control routine ends.

In step S12, the controller CT obtains the indoor temperature based on the relevant signal (e.g., the signal from the indoor temperature sensor), and compares the indoor temperature with a series of preset indoor temperatures that are set and stored in advance. Here, the series of preset indoor temperatures may include a first preset indoor temperature, a second preset indoor temperature less than the first preset indoor temperature, and a third preset indoor temperature less than the second preset indoor temperature. After the comparison, an adjustment of the operating frequency of the compressor 80 is determined according to the comparison result such that the greater the indoor temperature, the smaller the operating frequency of the compressor 80. In particular: when it is determined that the indoor temperature is equal to or higher than the first preset indoor temperature, the control routine proceeds to step S131; when it is determined that the indoor temperature is less than the first preset indoor temperature and equal to or greater than the second preset indoor temperature, the control routine proceeds to step S132; when it is determined that the indoor temperature is less than the second preset indoor temperature and equal to or greater than the third preset indoor temperature, the control routine proceeds to step S133; when it is determined that the indoor temperature is less than the third preset indoor temperature, the control routine is ended, i.e., the compressor 80 is maintained at the current operating frequency.

In step S131, the operating frequency of the compressor 80 is decreased from the current operating frequency by a first decrease value (adjustment value), and then the control routine of the present cycle ends. In step S132, the operating frequency of the compressor 80 is decreased from the current operating frequency by the second decrease value, and then the control routine of the present cycle ends. In step S133, the operating frequency of the compressor 80 is decreased from the current operating frequency by the third decrease value, and then the control routine of the present cycle ends. Here, the first reduction value is larger than the second reduction value and the second reduction value is smaller than the third reduction value.

The first predetermined indoor temperature may be 19-29 degrees celsius, preferably 21-27 degrees celsius, more preferably 24 degrees celsius. The second preset indoor temperature may be 15-25 degrees celsius, preferably 17-23 degrees celsius, more preferably 20 degrees celsius. The third predetermined indoor temperature may be 10-20 degrees celsius, preferably 12-18 degrees celsius, more preferably 15 degrees celsius.

The first reduction value may be in the range of 15HZ to 25HZ, preferably the first reduction value is in the range of 17HZ to 23HZ, more preferably the first reduction value is 20 HZ. The second reduction may be in the range of 11HZ to 21HZ, preferably the second reduction is in the range of 13HZ to 19HZ, more preferably the second reduction is 16 HZ. The third reduction value may be in the range of 3HZ to 13HZ, preferably the third reduction value is in the range of 6HZ to 10HZ, more preferably the third reduction value is 8 HZ.

In some examples, the indoor fan 40 may have a plurality of dampers. In this case, the compressor 80 may have a plurality of normal operating frequency ranges in one-to-one correspondence with a plurality of dampers of the indoor fan 40. Thus, the reduction of the operating frequency of the compressor 80 may be implemented as: the upper limit of the normal operating frequency range corresponding to the current windshield of the indoor fan 40 is reduced.

Here, it is to be noted that the number of the series of preset indoor temperatures is not limited to three, but may be more or less.

With the control methods of the first and second exemplary embodiments of the invention, the control steps may further be: the controller CT, upon receiving a signal that one of the first and

second outlets

20 and 30 is to be closed or reduced in opening degree, issues an instruction to adjust the operation of the compressor 80 and/or the operation of the expansion valve 84 according to the operation mode of the air conditioner AC and according to the ambient temperature and/or the operation parameters of the air conditioner AC, and, at the same time as or after the adjustment of the operation of the compressor 80 and/or the adjustment of the operation of the expansion valve 84 is completed, causes one of the first and

second outlets

20 and 30 to be closed or reduced in opening degree again. That is, the adjustment of the operation of the compressor 80 and/or the adjustment of the operation of the expansion valve 84 are advanced in advance of the closing or opening degree reducing action of the air outlet.

According to the invention, an air conditioner AC is also provided. The air conditioner AC includes an air conditioner circulation circuit and a controller CT that controls the operation of the air conditioner AC. The controller CT may control the operation of the air conditioner AC according to the control method as described above.

In summary, according to the present invention, when one of the first and second outlets is closed or reduced in opening degree during operation of the air conditioner, the operation of the compressor and/or the operation of the expansion valve are adjusted according to the operation mode of the air conditioner and according to the ambient temperature and/or the operation parameters of the air conditioner. Therefore, when the air conditioner works in a low-load refrigeration mode, the running fluctuation of the air conditioning system caused by insufficient superheat degree or even larger superheat degree at the bottom of the compressor can be avoided, and when the air conditioner works in a heating mode, the running fluctuation of the air conditioning system caused by overload shutdown or overhigh temperature and pressure of an inner pipe can be avoided, so that the air conditioning system can be effectively controlled, the fluctuation of the whole system can be optimized, and the reliability problem can be solved.

In addition, since the adjustment of the operation of the compressor and/or the adjustment of the operation of the expansion valve can be made ahead of the closing or opening-degree-reducing action of the air outlet, even short-time fluctuation can be avoided to further ensure the stability and reliability of the operation of the whole machine.

In addition, through experimentation, the inventors have found that superior system operating stability (particularly in the case of employing the preferred preset temperature value and preferred regulation value as described above) is obtained with the control method according to the present invention. For example, in a certain experiment involving that one of the outlets is closed and the air conditioner is in a heating mode, the normal operation pressure (discharge pressure at the compressor discharge) when one of the outlets is not closed is 35.5kgf, the overshoot pressure when the adjustment compensation is applied is 36.5kgf, i.e., only 1kgf higher to remain stable after one of the outlets is closed, and the overshoot pressure when the adjustment compensation is not applied is 40.3kgf, i.e., 4.8kgf higher to cause large fluctuation. For another example, in an experiment involving one of the outlets being closed and the air conditioner being in the low load cooling mode, the operating superheat (e.g., compressor bottom superheat) was 3.43 degrees celsius when one of the outlets was not closed, the operating superheat with the adjustment compensation was 3.5 degrees celsius after one of the outlets was closed, i.e., the operating superheat was substantially stable and met, and the operating superheat without the adjustment compensation was-0.37 degrees celsius, i.e., a large deviation occurred and failed to meet the requirements.

In addition, the present invention is susceptible to a number of different variations.

For example, although the above description is of an inverter compressor and the adjustment of its operating frequency. However, the present invention can also be applied to other types of compressors, such as a fixed frequency compressor having a variable capacity function. In this case, the operation stability of the air conditioning system when one of the air outlets is closed can be achieved by adjusting the capacity of the variable capacity compressor.

For another example, although the control method according to the first example embodiment of the invention described above relates to the adjustment of the operating opening degree of the expansion valve and the control method according to the second example embodiment of the invention relates to the adjustment of the operating frequency of the compressor, it is contemplated that the adjustment of the operating opening degree of the expansion valve and the adjustment of the operating frequency may be compatible.

It is noted that, throughout this document, relational terms such as "first," "second," and "third," and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. In addition, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: it is obvious that the above embodiments/examples are only examples for clearly illustrating the present invention and do not limit the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. All embodiments/examples need not be, and cannot be, exhaustive herein. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.

Claims

1. A control method for controlling the operation of an Air Conditioner (AC) comprising an indoor unit (10), said indoor unit (10) being provided with a first outlet mouth (20) and a second outlet mouth (30), said Air Conditioner (AC) further comprising a compressor (80) and an expansion valve (84) which form part of an air conditioning circulation circuit, characterized in that it comprises the following control steps:

-during operation of the Air Conditioner (AC), when one of the first outlet mouth (20) and the second outlet mouth (30) is closed or reduced in opening degree, adjusting the operation of the compressor (80) and/or the operation of the expansion valve (84) according to the operating mode of the Air Conditioner (AC) and to the ambient temperature and/or the operating parameters of the Air Conditioner (AC);

the operation modes of the Air Conditioner (AC) include a heating mode and a cooling mode, the ambient temperature includes an indoor temperature and an outdoor temperature, the operation parameters of the Air Conditioner (AC) include a discharge temperature of the compressor (80),

the control step further comprises: when the Air Conditioner (AC) is operated in a cooling mode, reducing an operating opening degree of the expansion valve (84) if an outdoor temperature is less than or equal to a preset outdoor temperature and/or a discharge temperature of the compressor (80) is less than or equal to a preset discharge temperature;

and

the control step further comprises: adjusting an operating frequency of the compressor (80) according to an indoor temperature when the Air Conditioner (AC) is operated in a heating mode;

set for a series of preset indoor temperatures, a series of preset indoor temperatures include first preset indoor temperature, be less than first preset indoor temperature's second preset indoor temperature and be less than the second preset indoor temperature's third preset indoor temperature, and

the control step further comprises: reducing the operating frequency of the compressor (80) from a current operating frequency by a first reduction value when an indoor temperature is equal to or greater than the first preset indoor temperature, reducing the operating frequency of the compressor (80) from the current operating frequency by a second reduction value when the indoor temperature is less than the first preset indoor temperature and equal to or greater than the second preset indoor temperature, reducing the operating frequency of the compressor (80) from the current operating frequency by a third reduction value when the indoor temperature is less than the second preset indoor temperature and equal to or greater than the third preset indoor temperature, and maintaining the current operating frequency of the compressor (80) when the indoor temperature is less than the third preset indoor temperature, wherein the first reduction value is greater than the second reduction value and the second reduction value is less than the third reduction value;

the Air Conditioner (AC) further comprises a Controller (CT) which controls the operation of the Air Conditioner (AC), an

The control step further comprises: the Controller (CT), upon receiving a signal that one of the first outlet vent (20) and the second outlet vent (30) is to be closed or reduced in opening degree, issues an instruction to adjust the operation of the compressor (80) and/or the operation of the expansion valve (84) in accordance with the operation mode of the Air Conditioner (AC) and in accordance with the ambient temperature and/or the operation parameters of the Air Conditioner (AC), and, at the same time as or after the adjustment of the operation of the compressor (80) and/or the adjustment of the operation of the expansion valve (84) is completed, causes one of the first outlet vent (20) and the second outlet vent (30) to be closed or reduced in opening degree.

2. The control method according to claim 1, characterized in that the Air Conditioner (AC) is a cabinet air conditioner and the first outlet mouth (20) is an upper outlet mouth and the second outlet mouth (30) is a lower outlet mouth.

3. The control method according to claim 2, wherein the outlet that is closed or reduced in opening degree is the lower outlet.

4. The control method according to claim 1, wherein the first preset indoor temperature is 24 degrees celsius, the second preset indoor temperature is 20 degrees celsius, and the third preset indoor temperature is 15 degrees celsius.

5. The control method according to claim 1, characterized in that the first reduction value is in a range of 15HZ to 25HZ, the second reduction value is in a range of 11HZ to 21HZ, and the third reduction value is in a range of 3HZ to 13 HZ.

6. The control method according to claim 5, characterized in that the first reduction value is 20HZ, the second reduction value is 16HZ, and the third reduction value is 8 HZ.

7. The control method according to claim 1, characterized in that:

the indoor unit (10) includes an indoor fan (40) having a plurality of dampers, the compressor (80) has a plurality of normal operating frequency ranges in one-to-one correspondence with the plurality of dampers of the indoor fan (40), and

the reduction in the operating frequency of the compressor (80) is: a reduction of an upper limit of a normal operating frequency range corresponding to a current damper of the indoor fan (40).

8. An Air Conditioner (AC) comprising an air conditioning circulation circuit and a Controller (CT) controlling the operation of the Air Conditioner (AC), characterized in that the Controller (CT) controls the operation of the Air Conditioner (AC) according to the control method of any one of claims 1 to 7.