Air conditioner, control method and device therefor, and readable storage medium

Abstract

The application provides an air conditioner and a control method, a control device and a readable storage medium thereof, wherein the air conditioner comprises a compressor, a fluorine pump and an outdoor condensing fan, and the control method of the air conditioner comprises the following steps: detecting an outdoor ambient temperature; detecting whether the compressor is running when the outdoor ambient temperature is less than or equal to T1; starting the fluorine pump to make the air conditioner enter a first working mode under the condition that the compressor is running, sequentially stopping the compressor, the fluorine pump and the outdoor condensing fan, and then sequentially starting the fluorine pump and the outdoor condensing fan to make the air conditioner enter a second working mode; and sequentially starting the fluorine pump and the outdoor condensing fan to make the air conditioner enter the second working mode under the condition that the compressor is stopped.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and more specifically, to an air conditioner and its control method, control device, and readable storage medium. Background Technology

[0002] In existing refrigerant pump air conditioners, when switching from compressor mode (compressor running, refrigerant pump off) to pump mode (compressor off, refrigerant pump running), the switch is usually performed directly from compressor mode to pump mode. Since the unit operates at higher pressure in compressor mode, directly switching modes can easily cause the air conditioner to freeze. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] Therefore, the first objective of this invention is to provide a control method for an air conditioner.

[0005] The second objective of this invention is to provide a control device for an air conditioner.

[0006] A third objective of this invention is to provide a readable storage medium.

[0007] The fourth objective of this invention is to provide an air conditioner.

[0008] To achieve at least one of the above objectives, according to a first aspect of the present invention, a control method for an air conditioner is provided. The air conditioner includes a compressor, a refrigerant pump, and an outdoor condenser fan. The control method includes: detecting the outdoor ambient temperature; detecting whether the compressor is running when the outdoor ambient temperature is less than or equal to T1; when the compressor is running, turning on the refrigerant pump to put the air conditioner into a first operating mode; sequentially turning off the compressor, the refrigerant pump, and the outdoor condenser fan; and then sequentially turning on the refrigerant pump and the outdoor condenser fan to put the air conditioner into a second operating mode; when the compressor is turned off, sequentially turning on the refrigerant pump and the outdoor condenser fan to put the air conditioner into the second operating mode.

[0009] The air conditioner control method proposed in this application can be used in an air conditioner, which can be a refrigerant pump air conditioner. The air conditioner includes a compressor, a refrigerant pump, and an outdoor condenser fan. This air conditioner can enter different operating modes according to different outdoor ambient temperatures. The specific control method of the air conditioner is as follows:

[0010] First, the outdoor ambient temperature is detected. When the outdoor ambient temperature is less than or equal to T1, the operating status of the compressor is further detected, and then the next control step is performed based on whether the compressor is running. The air conditioner control method proposed in this application is used in an air conditioner with three different operating modes: a first operating mode, a second operating mode, and a third operating mode. When the air conditioner is in the first operating mode, the compressor and the refrigerant pump run together. When the air conditioner is in the second operating mode, the refrigerant pump runs while the compressor is turned off. When the air conditioner is in the third operating mode, the compressor runs while the refrigerant pump is turned off. The second operating mode is suitable for situations with low outdoor ambient temperatures, the first operating mode is suitable for situations with slightly higher outdoor ambient temperatures, and the third operating mode is suitable for situations with even higher outdoor temperatures. Understandably, when the detected outdoor ambient temperature is less than or equal to T1, it indicates that the outdoor ambient temperature is low, and the second operating mode can be selected, i.e., the refrigerant pump runs while the compressor is turned off. However, if the compressor is running at this time, the overall operating pressure of the unit is high. If the compressor is directly turned off and the refrigerant pump is turned on, the rapid change in the unit's operating pressure can easily cause the air conditioner to malfunction. To avoid the above problems, this application first detects the operation of the compressor before controlling the air conditioner to enter the second working mode, and then performs the next control step based on whether the compressor is running.

[0011] Specifically, with the compressor running, the refrigerant pump is turned on to put the air conditioner into the first operating mode. Then, the compressor, refrigerant pump, and outdoor condenser fan are turned off sequentially. Afterward, the refrigerant pump and outdoor condenser fan are turned on sequentially to put the air conditioner into the second operating mode. This allows the unit's operating pressure to change slowly, preventing the air conditioner from freezing due to rapid pressure changes. Furthermore, with the compressor turned off, the refrigerant pump and outdoor condenser fan are turned on sequentially to put the air conditioner into the second operating mode. Understandably, if the compressor is detected to have turned off, it means the unit's operating pressure is not high or the unit is not running, and there is no risk of the air conditioner freezing due to rapid pressure changes. In this case, the refrigerant pump and outdoor condenser fan can be turned on sequentially normally to put the air conditioner into the second operating mode.

[0012] By detecting the compressor's operation before controlling the air conditioner to enter the second working mode, and then controlling the next step based on whether the compressor is running, the air conditioner can avoid freezing due to rapid changes in the unit's operating pressure, thus improving the reliability and stability of the air conditioner's operation.

[0013] According to the control method for an air conditioner described above, the present invention may also have the following distinguishing technical features:

[0014] In some technical solutions, the air conditioner may optionally include a condenser, and the control method may further include: when the air conditioner enters the second working mode, detecting the condensing pressure of the condenser; when the condensing pressure is less than P1, reducing the speed of the outdoor condenser fan; when the condensing pressure is greater than or equal to P1 and less than P2, increasing the speed of the outdoor condenser fan; and when the condensing pressure is greater than or equal to P2, controlling the outdoor condenser fan to run at full speed.

[0015] In this technical solution, the speed control of the outdoor condenser fan in the second operating mode of the air conditioner is limited. The air conditioner includes a condenser, and when the air conditioner enters the second operating mode, the speed of the outdoor condenser fan can be controlled according to the condensing pressure of the condenser. Specifically, when the condensing pressure is less than P1, the speed of the outdoor condenser fan is reduced; when the condensing pressure is greater than or equal to P1 and less than P2, the speed of the outdoor condenser fan is increased; when the condensing pressure is greater than or equal to P2, the outdoor condenser fan is controlled to run at full speed. Understandably, by increasing the speed of the outdoor condenser fan, the condensing pressure can be reduced. Therefore, by controlling the speed of the outdoor condenser fan to increase or decrease according to the different condensing pressures, the speed of the outdoor condenser fan can be adapted to the condensing pressure. When the condensing pressure is too high, the speed of the outdoor condenser fan is increased; when the condensing pressure is low, the speed of the outdoor condenser fan is decreased. This avoids excessively high condensing pressure and reduces energy consumption, making the air conditioner economical.

[0016] In some technical solutions, optionally, when the outdoor ambient temperature is greater than T1 and less than or equal to T2, the compressor and refrigerant pump are turned on in sequence to put the air conditioner into the first working mode.

[0017] This technical solution further defines the control method for the air conditioner. The air conditioner also has a first operating mode. When the air conditioner is in the first operating mode, the compressor and refrigerant pump operate simultaneously. The first operating mode is suitable for situations where the outdoor temperature is high. Specifically, when the outdoor ambient temperature is greater than T1 and less than or equal to T2, the compressor and refrigerant pump are turned on sequentially to allow the air conditioner to enter the first operating mode.

[0018] Further, the specific steps for sequentially activating the compressor and refrigerant pump are as follows: Detect the indoor return air temperature; when the indoor return air temperature is greater than T4, increase the compressor speed; when the indoor return air temperature is less than or equal to T4, decrease the compressor speed. The quiet zone is 2°C. After activating the compressor, activate the refrigerant pump; the refrigerant pump speed can also be controlled based on the indoor return air temperature.

[0019] In some technical solutions, the control method may optionally include: detecting the condensing pressure when the air conditioner enters the first working mode; controlling the outdoor condensing fan speed to decrease when the condensing pressure is less than P3; controlling the outdoor condensing fan speed to increase when the condensing pressure is greater than or equal to P3 and less than P4; and controlling the outdoor condensing fan to run at full speed when the condensing pressure is greater than or equal to P4; wherein P3 is greater than P2.

[0020] In this technical solution, the speed control of the outdoor condenser fan in the first operating mode of the air conditioner is limited. The air conditioner includes a condenser, and when the air conditioner enters the first operating mode, the speed of the outdoor condenser fan can be controlled according to the condensing pressure of the condenser. Specifically, when the condensing pressure is less than P3, the speed of the outdoor condenser fan is reduced; when the condensing pressure is greater than or equal to P3 and less than P4, the speed of the outdoor condenser fan is increased; when the condensing pressure is greater than or equal to P4, the outdoor condenser fan is controlled to run at full speed. Here, P3 is greater than P2. The outdoor condenser fan running at full speed means that the outdoor condenser fan operates at its maximum speed. Understandably, by increasing the speed of the outdoor condenser fan, the condensing pressure can be reduced. Therefore, by controlling the speed of the outdoor condenser fan to increase or decrease according to the different condensing pressures, the speed of the outdoor condenser fan can be adapted to the condensing pressure; when the condensing pressure is too high, the speed of the outdoor condenser fan is increased, and when the condensing pressure is low, the speed of the outdoor condenser fan is decreased. In this way, excessively high condensing pressure can be avoided, energy consumption can be reduced, and the air conditioner can be made economical.

[0021] In some technical solutions, optionally, when the outdoor ambient temperature is greater than T2, the compressor is turned on and the refrigerant pump is turned off so that the air conditioner enters the third working mode.

[0022] This technical solution further defines the control method for the air conditioner. The air conditioner also features a third operating mode. In this mode, the compressor runs while the refrigerant pump shuts off. This third operating mode is suitable for situations where the outdoor temperature is very high. Specifically, when the outdoor ambient temperature exceeds T2, the compressor is turned on and the refrigerant pump is turned off to allow the air conditioner to enter the third operating mode.

[0023] Furthermore, after the air conditioner enters the third operating mode, the compressor speed is controlled according to the following method: the indoor return air temperature is detected; when the indoor return air temperature is greater than T4, the compressor speed is increased; when the indoor return air temperature is less than or equal to T4, the compressor speed is decreased. The quiet temperature range is 2℃.

[0024] In some technical solutions, the control method may optionally include: detecting the condensing pressure when the air conditioner enters the third working mode; controlling the outdoor condensing fan speed to decrease when the condensing pressure is less than P5; controlling the outdoor condensing fan speed to increase when the condensing pressure is greater than or equal to P5 and less than P6; and controlling the outdoor condensing fan to run at full speed when the condensing pressure is greater than or equal to P6; wherein P5 is greater than P4.

[0025] In this technical solution, the speed control of the outdoor condenser fan in the third operating mode of the air conditioner is limited. The air conditioner includes a condenser, and when the air conditioner enters the third operating mode, the speed of the outdoor condenser fan can be controlled according to the condensing pressure of the condenser. Specifically, when the condensing pressure is less than P5, the speed of the outdoor condenser fan is reduced; when the condensing pressure is greater than or equal to P5 but less than P6, the speed of the outdoor condenser fan is increased; when the condensing pressure is greater than or equal to P6, the outdoor condenser fan is controlled to run at full speed. Here, P5 is greater than P4. Understandably, by increasing the speed of the outdoor condenser fan, the condensing pressure can be reduced. Therefore, by controlling the speed of the outdoor condenser fan to increase or decrease according to the different condensing pressures, the speed of the outdoor condenser fan can be adapted to the condensing pressure. When the condensing pressure is too high, the speed of the outdoor condenser fan is increased; when the condensing pressure is low, the speed of the outdoor condenser fan is decreased. In this way, excessively high condensing pressure can be avoided, and energy consumption can be reduced, making the air conditioner economical.

[0026] In some technical solutions, optionally, when the air conditioner is operating in a first working mode or a second working mode, it is detected whether the air conditioner meets the mode switching conditions; if the air conditioner meets the mode switching conditions, the air conditioner is controlled to end the first working mode or the second working mode and enter the third working mode; wherein, the mode switching conditions include at least one of the following: indoor return air temperature greater than or equal to T3, outdoor ambient temperature greater than T1+2℃, or condensing pressure less than P1.

[0027] This technical solution further defines the control method for the air conditioner. When the air conditioner is operating in either the first working mode (i.e., the refrigerant pump and compressor operate simultaneously) or the second working mode (i.e., the refrigerant pump operates while the compressor is off), the system detects whether the air conditioner meets the mode transition conditions. When the air conditioner meets the mode transition conditions, it controls the air conditioner to end the first or second working mode and enter the third working mode, i.e., turning on the compressor and turning off the refrigerant pump. Specifically, the mode transition conditions are: the indoor return air temperature is greater than or equal to T3, the outdoor ambient temperature is greater than T1+2℃, or the condensing pressure is less than P1, at least one of these conditions must be met. Understandably, when the air conditioner is in the third working mode, its cooling capacity is stronger than when it is in the first or second working modes. Therefore, when the indoor return air temperature is high, the outdoor ambient temperature is high, or the condensing pressure is low, the air conditioner can be controlled to enter the third working mode to improve its cooling capacity.

[0028] In some technical solutions, the air conditioner may optionally include an indoor fan, which, before detecting the indoor ambient temperature, includes: detecting the indoor ambient temperature; and controlling the indoor fan to turn on when the indoor ambient temperature is greater than T4.

[0029] In this technical solution, when the indoor temperature is detected to be high, the indoor fan is turned on to cool the room.

[0030] The units for P1, P2, P3, P4, P5, and P6 are bar, while the units for T1, T2, T3, and T4 are °C.

[0031] A second aspect of the present invention also provides a control device for an air conditioner, the air conditioner including a compressor, a refrigerant pump, and an outdoor condenser fan. The control device includes: a first detection unit for detecting the outdoor ambient temperature; a second detection unit for detecting whether the compressor is running when the outdoor ambient temperature is less than T1; a control unit for turning on the refrigerant pump to put the air conditioner into a first operating mode when the compressor is running, sequentially turning off the compressor, the refrigerant pump, and the outdoor condenser fan, and sequentially turning on the refrigerant pump and the outdoor condenser fan to put the air conditioner into a second operating mode; the control unit is also used to sequentially turn on the refrigerant pump and the outdoor condenser fan to put the air conditioner into the second operating mode when the compressor is turned off.

[0032] The control device for an air conditioner proposed in this application can be used in an air conditioner, which can be a refrigerant pump air conditioner. The air conditioner includes a compressor, a refrigerant pump, and an outdoor condenser fan. The air conditioner can enter different working modes according to different outdoor ambient temperatures.

[0033] Furthermore, the control device of the air conditioner includes a first detection unit, a second detection unit, and a control unit. The first detection unit detects the outdoor ambient temperature, the second detection unit detects whether the compressor is running when the outdoor ambient temperature is lower than T1, and the control unit controls the operation of the refrigerant pump and the compressor based on the detection results of the first and second detection units. Specifically, the control unit is used to turn on the refrigerant pump when the compressor is running, so that the air conditioner enters a first operating mode, sequentially turn off the compressor, refrigerant pump, and outdoor condenser fan, and sequentially turn on the refrigerant pump and outdoor condenser fan, so that the air conditioner enters a second operating mode; the control unit is also used to sequentially turn on the refrigerant pump and outdoor condenser fan when the compressor is turned off, so that the air conditioner enters the second operating mode.

[0034] Specifically, the outdoor ambient temperature is first detected by the first detection unit. When the outdoor ambient temperature is less than or equal to T1, the operating status of the compressor is further detected by the second detection unit. Then, the control unit performs further control based on whether the compressor is running. The control device for the air conditioner proposed in this application is used in an air conditioner with three different operating modes: a first operating mode, a second operating mode, and a third operating mode. When the air conditioner is in the first operating mode, the compressor and the refrigerant pump run together. When the air conditioner is in the second operating mode, the refrigerant pump runs while the compressor is turned off. When the air conditioner is in the third operating mode, the compressor runs while the refrigerant pump is turned off. The second operating mode is suitable for situations where the outdoor ambient temperature is low, the first operating mode is suitable for situations where the outdoor ambient temperature is slightly higher, and the third operating mode is suitable for situations where the outdoor temperature is even higher. Understandably, when the detected outdoor ambient temperature is less than or equal to T1, it indicates that the outdoor ambient temperature is low, and the second operating mode can be selected, i.e., the refrigerant pump runs while the compressor is turned off. However, if the compressor is running at this time, the overall operating pressure of the unit is high. If the compressor is directly turned off and the refrigerant pump is turned on, the operating pressure of the unit changes too quickly, which may cause the air conditioner to malfunction. To avoid the above problems, this application first detects the operation of the compressor before controlling the air conditioner to enter the second working mode, and then performs the next control step based on whether the compressor is running.

[0035] Specifically, with the compressor running, the refrigerant pump is turned on to put the air conditioner into the first operating mode. Then, the compressor, refrigerant pump, and outdoor condenser fan are turned off sequentially. Afterward, the refrigerant pump and outdoor condenser fan are turned on sequentially to put the air conditioner into the second operating mode. This allows the unit's operating pressure to change slowly, preventing the air conditioner from freezing due to rapid pressure changes. Furthermore, with the compressor turned off, the refrigerant pump and outdoor condenser fan are turned on sequentially to put the air conditioner into the second operating mode. Understandably, if the compressor is detected to have turned off, it means the unit's operating pressure is not high or the unit is not running, and there is no risk of the air conditioner freezing due to rapid pressure changes. In this case, the refrigerant pump and outdoor condenser fan can be turned on sequentially normally to put the air conditioner into the second operating mode.

[0036] By detecting the compressor's operation before controlling the air conditioner to enter the second working mode, and then controlling the next step based on whether the compressor is running, the air conditioner can avoid freezing due to rapid changes in the unit's operating pressure, thus improving the reliability and stability of the air conditioner's operation.

[0037] In some technical solutions, the air conditioner may optionally include a condenser, and the control device of the air conditioner may include: a third detection unit, used to detect the condensing pressure of the condenser when the air conditioner enters the second working mode; the control unit is also used to: reduce the speed of the outdoor condenser fan when the condensing pressure is less than P1; increase the speed of the outdoor condenser fan when the condensing pressure is greater than or equal to P1 and less than P2; and control the outdoor condenser fan to run at full speed when the condensing pressure is greater than or equal to P2.

[0038] In this technical solution, the control device of the air conditioner is further defined. The air conditioner also includes a condenser, and when the air conditioner enters the second operating mode, the speed of the outdoor condenser fan can be controlled according to the condenser's condensing pressure. Therefore, a third detection unit is also provided in the air conditioner's control device, which is used to detect the condenser's condensing pressure when the air conditioner enters the second operating mode. The control unit is also used to control the speed of the outdoor condenser fan according to the range of condensing pressure.

[0039] Specifically, when the condensing pressure is less than P1, the speed of the outdoor condenser fan is reduced; when the condensing pressure is greater than or equal to P1 but less than P2, the speed of the outdoor condenser fan is increased; when the condensing pressure is greater than or equal to P2, the outdoor condenser fan is controlled to run at full speed. Understandably, increasing the speed of the outdoor condenser fan can reduce the condensing pressure. Therefore, by controlling the speed of the outdoor condenser fan to increase or decrease according to the different condensing pressures, the speed of the outdoor condenser fan can be adapted to the condensing pressure. When the condensing pressure is too high, the speed of the outdoor condenser fan is increased; when the condensing pressure is low, the speed of the outdoor condenser fan is decreased. In this way, excessively high condensing pressure can be avoided, energy consumption can be reduced, and the air conditioner can achieve good economic efficiency.

[0040] In some technical solutions, the control unit is optionally also used to sequentially turn on the compressor and the refrigerant pump when the outdoor ambient temperature is greater than T1 and less than or equal to T2, so that the air conditioner enters the first working mode.

[0041] In this technical solution, the control unit is further defined. The air conditioner also has a first operating mode. When the air conditioner is in the first operating mode, the compressor and the refrigerant pump operate simultaneously. The first operating mode is suitable for situations where the outdoor temperature is high. Specifically, when the outdoor ambient temperature is greater than T1 and less than or equal to T2, the control unit sequentially controls the compressor and the refrigerant pump to start, so that the air conditioner enters the first operating mode.

[0042] Furthermore, the air conditioner's control unit also includes a fifth detection unit, which detects the indoor return air temperature. The control unit is also used to increase the compressor speed after the air conditioner enters the first operating mode and when the indoor return air temperature is greater than T4; and to decrease the compressor speed after the air conditioner enters the first operating mode and when the indoor return air temperature is less than or equal to T4. The quiet temperature range is 2°C. After the compressor is turned on, the refrigerant pump is activated, and the speed of the refrigerant pump can also be controlled according to the indoor return air temperature.

[0043] In some technical solutions, optionally, the third detection unit is also used to detect the condensing pressure when the air conditioner enters the first working mode; the control unit is also used to control the outdoor condensing fan speed to decrease when the condensing pressure is less than P3; control the outdoor condensing fan speed to increase when the condensing pressure is greater than or equal to P3 and less than P4; and control the outdoor condensing fan to run at full speed when the condensing pressure is greater than or equal to P4; wherein, P3 is greater than P2.

[0044] In this technical solution, the third detection unit and the control unit are further defined. The air conditioner includes a condenser. When the air conditioner enters the first operating mode, the speed of the outdoor condenser fan can be controlled according to the condensing pressure of the condenser. Specifically, the third detection unit is used to detect the condensing pressure when the air conditioner enters the first operating mode. The control unit is used to reduce the speed of the outdoor condenser fan when the condensing pressure is less than P3; increase the speed of the outdoor condenser fan when the condensing pressure is greater than or equal to P3 and less than P4; and control the outdoor condenser fan to run at full speed when the condensing pressure is greater than or equal to P4. Here, P3 is greater than P2. The outdoor condenser fan running at full speed means that the outdoor condenser fan operates at its maximum speed. Understandably, by increasing the speed of the outdoor condenser fan, the condensing pressure can be reduced. Therefore, by controlling the outdoor condenser fan to increase or decrease its speed according to the different condensing pressures, the speed of the outdoor condenser fan can be adapted to the condensing pressure; the speed of the outdoor condenser fan can be increased when the condensing pressure is too high, and decreased when the condensing pressure is low. In this way, excessively high condensing pressure can be avoided, energy consumption can be reduced, and the air conditioner can be made economical.

[0045] In some technical solutions, the control unit is optionally also used to turn on the compressor and turn off the refrigerant pump when the outdoor ambient temperature is greater than T2, so that the air conditioner enters the third operating mode.

[0046] In this technical solution, the control unit is further defined. The air conditioner also has a third operating mode. When the air conditioner is in the third operating mode, the compressor runs and the refrigerant pump shuts off. The third operating mode is suitable for situations where the outdoor temperature is very high. Specifically, when the outdoor ambient temperature is greater than T2, the control unit controls the compressor to start and controls the refrigerant pump to shut off, so that the air conditioner enters the third operating mode.

[0047] Furthermore, the air conditioner's control unit also includes a fifth detection unit, which is used to detect the indoor return air temperature. The control unit is also used to increase the compressor speed after the air conditioner enters the third operating mode and when the indoor return air temperature is greater than T4; and to decrease the compressor speed after the air conditioner enters the third operating mode and when the indoor return air temperature is less than or equal to T4. The quiet temperature range is 2°C.

[0048] In some technical solutions, optionally, the third detection unit is also used to detect the condensing pressure when the air conditioner enters the third working mode; the control unit is also used to control the outdoor condensing fan speed to decrease when the condensing pressure is less than P5; control the outdoor condensing fan speed to increase when the condensing pressure is greater than or equal to P5 and less than P6; and control the outdoor condensing fan to run at full speed when the condensing pressure is greater than or equal to P6; wherein P5 is greater than P4.

[0049] In this technical solution, the third detection unit and the control unit are further defined. The air conditioner includes a condenser. When the air conditioner enters the third operating mode, the speed of the outdoor condenser fan can be controlled according to the condensing pressure of the condenser. Specifically, the third detection unit is used to detect the condensing pressure when the air conditioner enters the third operating mode. The control unit is used to control the speed of the outdoor condenser fan to decrease when the condensing pressure is less than P5; to control the speed of the outdoor condenser fan to increase when the condensing pressure is greater than or equal to P5 and less than P6; and to control the outdoor condenser fan to run at full speed when the condensing pressure is greater than or equal to P6. Here, P5 is greater than P4. The outdoor condenser fan running at full speed means that the outdoor condenser fan operates at its maximum speed. Understandably, by increasing the speed of the outdoor condenser fan, the condensing pressure can be reduced. Therefore, by controlling the speed of the outdoor condenser fan to increase or decrease according to the different condensing pressures, the speed of the outdoor condenser fan can be adapted to the condensing pressure. When the condensing pressure is too high, the speed of the outdoor condenser fan increases; when the condensing pressure is low, the speed of the outdoor condenser fan decreases. In this way, excessively high condensing pressure can be avoided, energy consumption can be reduced, and the air conditioner can be made economical.

[0050] In some technical solutions, the control device of the air conditioner may optionally include: a fourth detection unit, used to detect whether the air conditioner meets the mode switching conditions when the air conditioner is operating in the first working mode or the second working mode; the control unit is also used to control the air conditioner to end the first working mode or the second working mode and enter the third working mode when the air conditioner meets the mode switching conditions; wherein, the mode switching conditions include at least one of the following: indoor return air temperature greater than or equal to T3, outdoor ambient temperature greater than T1+2℃, or condensing pressure less than P1.

[0051] In this technical solution, a fourth detection unit is also provided in the control device of the air conditioner. This fourth detection unit is used to detect whether the air conditioner meets the mode switching conditions when it is operating in the first or second working mode. When the air conditioner meets the mode switching conditions, the control unit controls the air conditioner to end the first or second working mode and enter the third working mode, that is, to start the compressor and stop the refrigerant pump. Specifically, the mode switching conditions are: the indoor return air temperature is greater than or equal to T3, the outdoor ambient temperature is greater than T1+2℃, or the condensing pressure is less than P1, at least one of these conditions must be met. Understandably, when the air conditioner is in the third working mode, its cooling capacity is stronger than when it is in the first or second working mode. Therefore, when the indoor return air temperature is high, the outdoor ambient temperature is high, or the condensing pressure is low, the air conditioner can be controlled to enter the third working mode to improve its cooling capacity.

[0052] A third aspect of the present invention also provides a readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the air conditioner control method as proposed in the first aspect of the present invention. Therefore, it possesses all the beneficial technical effects of the air conditioner control method in any possible technical solution of the first aspect described above.

[0053] A fourth aspect of the present invention also provides an air conditioner comprising: a control device for an air conditioner as provided in the second aspect of the present invention; and / or a readable storage medium as provided in the third aspect of the present invention.

[0054] The air conditioner provided in the fourth aspect of the present invention, having the control device of the air conditioner proposed in the second aspect of the present invention and / or the readable storage medium proposed in the third aspect of the present invention, has all the beneficial effects of the control device of the air conditioner and / or the readable storage medium.

[0055] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0056] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0057] Figure 1 One of the schematic flowcharts of an air conditioner control method according to an embodiment of the present invention is shown;

[0058] Figure 2 A second schematic flowchart of an air conditioner control method according to an embodiment of the present invention is shown;

[0059] Figure 3 The third schematic flowchart illustrates an embodiment of the control method for an air conditioner according to the present invention;

[0060] Figure 4 The fourth schematic flowchart illustrates a control method for an air conditioner according to an embodiment of the present invention;

[0061] Figure 5 Fifth of the flowcharts illustrates a control method for an air conditioner according to an embodiment of the present invention;

[0062] Figure 6 A schematic flowchart of an air conditioner control method according to an embodiment of the present invention is shown in Figure 6.

[0063] Figure 7 The seventh illustration shows a flowchart of an air conditioner control method according to an embodiment of the present invention;

[0064] Figure 8One of the structural block diagrams of an air conditioner control device according to an embodiment of the present invention is shown;

[0065] Figure 9 A second structural block diagram of an air conditioner control device according to an embodiment of the present invention is shown;

[0066] Figure 10 The third structural block diagram of the control device of an air conditioner according to an embodiment of the present invention is shown;

[0067] Figure 11 The fourth block diagram shows the structure of the control device of an air conditioner according to an embodiment of the present invention.

[0068] in, Figures 8 to 11 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0069] 100 Air conditioner control device, 110 First detection unit, 120 Second detection unit, 130 Third detection unit, 140 Fourth detection unit, 150 Fifth detection unit, 160 Control unit, 170 Judgment unit. Detailed Implementation

[0070] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0071] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0072] The following reference Figures 1 to 11 This invention describes an air conditioner, an air conditioner control method, an air conditioner control device 100, and a readable storage medium provided according to some embodiments of the invention.

[0073] In one embodiment of this application, a control method for an air conditioner is provided, the air conditioner including a compressor, a refrigerant pump, and an outdoor condenser fan, such as... Figure 1 As shown in the figure, one of the flowcharts illustrates a control method for an air conditioner according to an embodiment of the present invention. The control method includes the following steps S102 to S108:

[0074] S102: If the outdoor ambient temperature is less than or equal to T1, confirm whether the compressor is running. If yes, proceed to step S104; otherwise, proceed to step S108.

[0075] S104: Turn on the refrigerant pump to put the air conditioner into the first operating mode;

[0076] S106: Turn off the compressor, refrigerant pump and outdoor condenser fan in sequence;

[0077] S108: Turn on the refrigerant pump and the outdoor condenser fan in sequence to put the air conditioner into the second working mode.

[0078] The air conditioner control method proposed in this application can be used in an air conditioner, which can be a refrigerant pump air conditioner. The air conditioner includes a compressor, a refrigerant pump, and an outdoor condenser fan. This air conditioner can enter different operating modes according to different outdoor ambient temperatures. The specific control method of the air conditioner is as follows:

[0079] First, the outdoor ambient temperature is detected. When the outdoor ambient temperature is less than or equal to T1, the operating status of the compressor is further detected, and then the next control step is performed based on whether the compressor is running. The air conditioner control method proposed in this application is used in an air conditioner with three different operating modes: a first operating mode, a second operating mode, and a third operating mode. When the air conditioner is in the first operating mode, the compressor and the refrigerant pump run together. When the air conditioner is in the second operating mode, the refrigerant pump runs while the compressor is turned off. When the air conditioner is in the third operating mode, the compressor runs while the refrigerant pump is turned off. The second operating mode is suitable for situations with low outdoor ambient temperatures, the first operating mode is suitable for situations with slightly higher outdoor ambient temperatures, and the third operating mode is suitable for situations with even higher outdoor temperatures. Understandably, when the detected outdoor ambient temperature is less than or equal to T1, it indicates that the outdoor ambient temperature is low, and the second operating mode can be selected, i.e., the refrigerant pump runs while the compressor is turned off. However, if the compressor is running at this time, the overall operating pressure of the unit is high. If the compressor is directly turned off and the refrigerant pump is turned on, the rapid change in the unit's operating pressure can easily cause the air conditioner to malfunction. To avoid the above problems, this application first detects the operation of the compressor before controlling the air conditioner to enter the second working mode, and then performs the next control step based on whether the compressor is running.

[0080] Specifically, with the compressor running, the refrigerant pump is turned on to put the air conditioner into the first operating mode. Then, the compressor, refrigerant pump, and outdoor condenser fan are turned off sequentially. Afterward, the refrigerant pump and outdoor condenser fan are turned on sequentially to put the air conditioner into the second operating mode. This allows the unit's operating pressure to change slowly, preventing the air conditioner from freezing due to rapid pressure changes. Furthermore, with the compressor turned off, the refrigerant pump and outdoor condenser fan are turned on sequentially to put the air conditioner into the second operating mode. Understandably, if the compressor is detected to have turned off, it means the unit's operating pressure is not high or the unit is not running, and there is no risk of the air conditioner freezing due to rapid pressure changes. In this case, the refrigerant pump and outdoor condenser fan can be turned on sequentially normally to put the air conditioner into the second operating mode.

[0081] By detecting the compressor's operation before controlling the air conditioner to enter the second working mode, and then controlling the next step based on whether the compressor is running, the air conditioner can avoid freezing due to rapid changes in the unit's operating pressure, thus improving the reliability and stability of the air conditioner's operation.

[0082] In some embodiments, the air conditioner may optionally include a condenser, such as Figure 2 As shown in the figure, a second schematic flowchart of the control method for an air conditioner according to an embodiment of the present invention is illustrated. The control method includes the following steps S202 to S210:

[0083] S202: When the air conditioner enters the second working mode, confirm whether the condensing pressure of the condenser is greater than or equal to P1 and less than P2. If yes, proceed to step S204; otherwise, proceed to step S206.

[0084] S204: Increase the speed of the outdoor condenser fan;

[0085] S206: Confirm whether the condensing pressure of the condenser is greater than or equal to P2. If yes, proceed to step S208; otherwise, proceed to step S210.

[0086] S208: Controls the outdoor condenser fan to run at full speed;

[0087] S210: Reduce the speed of the outdoor condenser fan.

[0088] In this embodiment, the speed control of the outdoor condenser fan in the second operating mode of the air conditioner is limited. The air conditioner includes a condenser, and when the air conditioner enters the second operating mode, the speed of the outdoor condenser fan can be controlled according to the condensing pressure of the condenser. Specifically, when the condensing pressure is less than P1, the speed of the outdoor condenser fan is reduced; when the condensing pressure is greater than or equal to P1 and less than P2, the speed of the outdoor condenser fan is increased; when the condensing pressure is greater than or equal to P2, the outdoor condenser fan is controlled to run at full speed. Understandably, increasing the speed of the outdoor condenser fan can reduce the condensing pressure. Therefore, by controlling the speed of the outdoor condenser fan to increase or decrease according to the different condensing pressures, the speed of the outdoor condenser fan can be adapted to the condensing pressure. When the condensing pressure is too high, the speed of the outdoor condenser fan is increased; when the condensing pressure is low, the speed of the outdoor condenser fan is decreased. This avoids excessively high condensing pressure and reduces energy consumption, making the air conditioner economical.

[0089] In some embodiments, optionally, such as Figure 3 As shown in the figure, a third schematic flowchart of the control method for an air conditioner according to an embodiment of the present invention is illustrated. The control method includes the following steps S302 to S312:

[0090] S302: Confirm whether the outdoor ambient temperature is less than or equal to T1. If yes, proceed to step S304; otherwise, proceed to step S312.

[0091] S304: Confirm whether the compressor is running. If yes, proceed to step S306; otherwise, proceed to step S310.

[0092] S306: Turn on the refrigerant pump to put the air conditioner into its first operating mode;

[0093] S308: Turn off the compressor, refrigerant pump and outdoor condenser fan in sequence;

[0094] S310: Turn on the refrigerant pump and outdoor condenser fan in sequence to put the air conditioner into the second working mode;

[0095] S312: When the outdoor ambient temperature is greater than T1 and less than or equal to T2, the compressor and refrigerant pump are turned on in sequence to put the air conditioner into the first working mode.

[0096] In this embodiment, the control method for the air conditioner is further defined. The air conditioner also has a first operating mode. When the air conditioner is in the first operating mode, the compressor and the refrigerant pump operate simultaneously. The first operating mode is suitable for situations where the outdoor temperature is high. Specifically, when the outdoor ambient temperature is greater than T1 and less than or equal to T2, the compressor and the refrigerant pump are turned on sequentially to allow the air conditioner to enter the first operating mode.

[0097] Further, the specific steps for sequentially activating the compressor and refrigerant pump are as follows: Detect the indoor return air temperature; when the indoor return air temperature is greater than T4, increase the compressor speed; when the indoor return air temperature is less than or equal to T4, decrease the compressor speed. The quiet zone is 2°C. After activating the compressor, activate the refrigerant pump; the refrigerant pump speed can also be controlled based on the indoor return air temperature.

[0098] In some embodiments, optionally, such as Figure 4 As shown in the figure, a fourth flowchart of the control method for an air conditioner according to an embodiment of the present invention is illustrated. The control method includes the following steps S402 to S410:

[0099] S402: When the air conditioner enters the first working mode, confirm whether the condensing pressure of the condenser is greater than or equal to P3 and less than P4. If yes, proceed to step S404; otherwise, proceed to step S406.

[0100] S404: Increase the speed of the outdoor condenser fan;

[0101] S406: Confirm whether the condensing pressure of the condenser is greater than or equal to P4. If yes, proceed to step S408; otherwise, proceed to step S410.

[0102] S408: Controls the outdoor condenser fan to run at full speed;

[0103] S410: Reduce the speed of the outdoor condenser fan.

[0104] In this embodiment, the speed control of the outdoor condenser fan in the first operating mode of the air conditioner is limited. The air conditioner includes a condenser, and when the air conditioner enters the first operating mode, the speed of the outdoor condenser fan can be controlled according to the condensing pressure of the condenser. Specifically, when the condensing pressure is less than P3, the speed of the outdoor condenser fan is reduced; when the condensing pressure is greater than or equal to P3 and less than P4, the speed of the outdoor condenser fan is increased; when the condensing pressure is greater than or equal to P4, the outdoor condenser fan is controlled to run at full speed. Here, P3 is greater than P2. The outdoor condenser fan running at full speed means that the outdoor condenser fan operates at its maximum speed. Understandably, by increasing the speed of the outdoor condenser fan, the condensing pressure can be reduced. Therefore, by controlling the speed of the outdoor condenser fan to increase or decrease according to the different condensing pressures, the speed of the outdoor condenser fan can be adapted to the condensing pressure. When the condensing pressure is too high, the speed of the outdoor condenser fan is increased; when the condensing pressure is low, the speed of the outdoor condenser fan is decreased. In this way, excessively high condensing pressure can be avoided, and energy consumption can be reduced, making the air conditioner economical.

[0105] In some embodiments, optionally, such as Figure 5As shown in the figure, a fifth flowchart of the control method for an air conditioner according to an embodiment of the present invention is illustrated. The control method includes the following steps S502 to S512:

[0106] S502: Confirm whether the outdoor ambient temperature is less than or equal to T1. If yes, proceed to step S504; otherwise, proceed to step S512.

[0107] S504: Confirm whether the compressor is running. If yes, proceed to step S506; otherwise, proceed to step S510.

[0108] S506: Turn on the refrigerant pump to put the air conditioner into its first operating mode;

[0109] S508: Turn off the compressor, refrigerant pump and outdoor condenser fan in sequence;

[0110] S510: Turn on the refrigerant pump and outdoor condenser fan in sequence to put the air conditioner into the second working mode;

[0111] S512: When the outdoor ambient temperature is greater than T2, turn on the compressor and turn off the refrigerant pump to put the air conditioner into the third working mode.

[0112] In this embodiment, the control method for the air conditioner is further defined. The air conditioner also has a third operating mode. When the air conditioner is in the third operating mode, the compressor runs and the refrigerant pump is turned off. The third operating mode is suitable for situations where the outdoor temperature is very high. Specifically, when the outdoor ambient temperature is greater than T2, the compressor is turned on and the refrigerant pump is turned off to allow the air conditioner to enter the third operating mode.

[0113] Furthermore, after the air conditioner enters the third operating mode, the compressor speed is controlled according to the following method: the indoor return air temperature is detected; when the indoor return air temperature is greater than T4, the compressor speed is increased; when the indoor return air temperature is less than or equal to T4, the compressor speed is decreased. The quiet temperature range is 2℃.

[0114] In some embodiments, optionally, such as Figure 6 As shown in the figure, a flowchart of the control method for an air conditioner according to an embodiment of the present invention is illustrated in section six. The control method includes the following steps S602 to S610:

[0115] S602: When the air conditioner enters the third working mode, confirm whether the condensing pressure of the condenser is greater than or equal to P5 and less than P6. If yes, proceed to step S604; otherwise, proceed to step S606.

[0116] S604: Increase the speed of the outdoor condenser fan;

[0117] S606: Confirm whether the condensing pressure of the condenser is greater than or equal to P6. If yes, proceed to step S608; otherwise, proceed to step S610.

[0118] S608: Controls the outdoor condenser fan to run at full speed;

[0119] S610: Reduce the speed of the outdoor condenser fan.

[0120] In this embodiment, the speed control of the outdoor condenser fan in the third operating mode of the air conditioner is limited. The air conditioner includes a condenser, and when the air conditioner enters the third operating mode, the speed of the outdoor condenser fan can be controlled according to the condensing pressure of the condenser. Specifically, when the condensing pressure is less than P5, the speed of the outdoor condenser fan is reduced; when the condensing pressure is greater than or equal to P5 and less than P6, the speed of the outdoor condenser fan is increased; when the condensing pressure is greater than or equal to P6, the outdoor condenser fan is controlled to run at full speed. Here, P5 is greater than P4. Understandably, by increasing the speed of the outdoor condenser fan, the condensing pressure can be reduced. Therefore, by controlling the speed of the outdoor condenser fan to increase or decrease according to the different condensing pressures, the speed of the outdoor condenser fan can be adapted to the condensing pressure. When the condensing pressure is too high, the speed of the outdoor condenser fan is increased; when the condensing pressure is low, the speed of the outdoor condenser fan is decreased. In this way, excessively high condensing pressure can be avoided, energy consumption can be reduced, and the air conditioner can have good economic efficiency.

[0121] In some embodiments, optionally, such as Figure 7 As shown in the figure, a flowchart of the control method for an air conditioner according to an embodiment of the present invention is illustrated in section seven. The control method includes the following steps S702 to S752:

[0122] S702: Confirm whether the outdoor ambient temperature is less than or equal to T1. If yes, proceed to step S704; otherwise, proceed to step S722.

[0123] S704: Confirm whether the compressor is running. If yes, proceed to step S706; otherwise, proceed to step S710.

[0124] S706: Turn on the refrigerant pump to put the air conditioner into its first operating mode;

[0125] S708: Turn off the compressor, refrigerant pump and outdoor condenser fan in sequence;

[0126] S710: Turn on the refrigerant pump and outdoor condenser fan in sequence to put the air conditioner into the second working mode;

[0127] S712: Confirm whether the condensing pressure of the condenser is greater than or equal to P1 and less than P2. If yes, proceed to step S714; otherwise, proceed to step S716.

[0128] S714: Increase the speed of the outdoor condenser fan;

[0129] S716: Confirm whether the condensing pressure of the condenser is greater than or equal to P2. If yes, proceed to step S718; otherwise, proceed to step S720.

[0130] S718: Controls the outdoor condenser fan to run at full speed;

[0131] S720: Reduces the speed of the outdoor condenser fan;

[0132] S722: Confirm whether the outdoor ambient temperature is greater than T1 and less than or equal to T2. If yes, proceed to step S724; otherwise, proceed to step S736.

[0133] S724: Turn on the compressor and refrigerant pump in sequence to put the air conditioner into the first working mode;

[0134] S726: Confirm whether the condensing pressure of the condenser is greater than or equal to P3 and less than P4. If yes, proceed to step S728; otherwise, proceed to step S730.

[0135] S728: Increase the speed of the outdoor condenser fan;

[0136] S730: Confirm whether the condensing pressure of the condenser is greater than or equal to P4. If yes, proceed to step S732; otherwise, proceed to step S734.

[0137] S732: Controls the outdoor condenser fan to run at full speed;

[0138] S734: Reduce the speed of the outdoor condenser fan;

[0139] S736: Turn on the compressor and turn off the refrigerant pump to put the air conditioner into the third operating mode;

[0140] S738: Confirm whether the condensing pressure of the condenser is greater than or equal to P5 and less than P6. If yes, proceed to step S740; otherwise, proceed to step S742.

[0141] S740: Increases the speed of the outdoor condenser fan;

[0142] S742: Confirm whether the condensing pressure of the condenser is greater than or equal to P6. If yes, proceed to step S744; otherwise, proceed to step S746.

[0143] S744: Controls the outdoor condenser fan to run at full speed;

[0144] S746: Reduce the speed of the outdoor condenser fan;

[0145] S748: Confirm whether the air conditioner meets the mode conversion conditions. If yes, proceed to step S750; otherwise, proceed to step S752.

[0146] S750: Controls the air conditioner to end the first or second working mode and enter the third working mode;

[0147] S752: Keep the air conditioner in its current operating mode.

[0148] In this embodiment, the control method for the air conditioner is further defined. When the air conditioner is operating in a first or second working mode, it is detected whether the air conditioner meets the mode switching conditions. When the air conditioner meets the mode switching conditions, it is controlled to end the first or second working mode and enter the third working mode, that is, to turn on the compressor and turn off the refrigerant pump. Specifically, the mode switching conditions are: the indoor return air temperature is greater than or equal to T3, the outdoor ambient temperature is greater than T1+2℃, or the condensing pressure is less than P1, at least one of these conditions must be met. Understandably, when the air conditioner is in the third working mode, its cooling capacity is stronger than when it is in the second working mode. Therefore, when the indoor return air temperature is high, or the outdoor ambient temperature is high, or the condensing pressure is low, the air conditioner can be controlled to enter the third working mode to improve its cooling capacity.

[0149] In one possible embodiment, T1 can be 5°C, T3 can be 35°C, P1 can be 1.5 bar, P2 can be 8 bar, P3 can be 13 bar, P4 can be 18 bar, P5 can be 20 bar, and P6 can be 30 bar.

[0150] In some embodiments, the air conditioner may optionally include an indoor fan, and before detecting the indoor ambient temperature, it may further include: detecting the indoor ambient temperature; and controlling the indoor fan to turn on when the indoor ambient temperature is greater than T4.

[0151] In this embodiment, when a high indoor temperature is detected, the indoor fan is turned on to cool the room.

[0152] The units for P1, P2, P3, P4, P5, and P6 are bar, while the units for T1, T2, T3, and T4 are °C.

[0153] In one possible embodiment, when switching from the compressor mode (i.e., the first operating mode) to the pump mode (i.e., the second operating mode), the compressor is turned off first, followed by the refrigerant pump (the shortest downtime is 10 seconds by default), and the fan is delayed for 20 seconds before shutting off. In pump mode, the electronic expansion valve has two optional control schemes: Scheme 1: always keep it at 100% full open (Scheme 1); Scheme 2: keep it at 100% open for 5 minutes (adjustable), and then adjust the opening according to the superheat (Scheme 2).

[0154] After the above logic is completed, the refrigerant pump will be turned on to 100%. After 20 seconds, the outdoor fan will start. The load increase / decrease frequency is 4 seconds / 1% (3 seconds can be achieved after adding a bypass pipe).

[0155] A second aspect of the present invention also provides a control device 100 for an air conditioner, such as... Figure 8 As shown, the air conditioner includes a compressor, a refrigerant pump, and an outdoor condenser fan. The control device 100 of the air conditioner includes: a first detection unit 110 for detecting the outdoor ambient temperature; a second detection unit 120 for detecting whether the compressor is running when the outdoor ambient temperature is less than T1; and a control unit 160 for turning on the refrigerant pump to put the air conditioner into a first operating mode when the compressor is running, sequentially turning off the compressor, the refrigerant pump, and the outdoor condenser fan, and sequentially turning on the refrigerant pump and the outdoor condenser fan to put the air conditioner into a second operating mode; the control unit 160 is also used to sequentially turn on the refrigerant pump and the outdoor condenser fan to put the air conditioner into the second operating mode when the compressor is turned off.

[0156] The control device 100 for an air conditioner proposed in this application can be used in an air conditioner, which can be a refrigerant pump air conditioner. The air conditioner includes a compressor, a refrigerant pump, and an outdoor condenser fan. The air conditioner can enter different working modes according to different outdoor ambient temperatures.

[0157] Furthermore, the control device 100 of the air conditioner includes a first detection unit 110, a second detection unit 120, and a control unit 160. The first detection unit 110 detects the outdoor ambient temperature, the second detection unit 120 detects whether the compressor is running when the outdoor ambient temperature is lower than T1, and the control unit 160 controls the operation of the refrigerant pump and the compressor based on the detection results of the first and second detection units 110 and 120. Specifically, the control unit 160 is used to turn on the refrigerant pump when the compressor is running, so that the air conditioner enters a first operating mode; then, it sequentially turns off the compressor, the refrigerant pump, and the outdoor condenser fan; and then sequentially turns on the refrigerant pump and the outdoor condenser fan, so that the air conditioner enters a second operating mode. The control unit 160 is also used to sequentially turn on the refrigerant pump and the outdoor condenser fan when the compressor is turned off, so that the air conditioner enters the second operating mode.

[0158] Specifically, the outdoor ambient temperature is first detected by the first detection unit 110. When the outdoor ambient temperature is less than or equal to T1, the operating status of the compressor is further detected by the second detection unit. Then, the control unit 160 performs further control based on whether the compressor is running. The control device 100 for the air conditioner proposed in this application is used in an air conditioner with three different operating modes: a first operating mode, a second operating mode, and a third operating mode. When the air conditioner is in the first operating mode, the compressor and the refrigerant pump operate together. When the air conditioner is in the second operating mode, the refrigerant pump operates while the compressor is turned off. When the air conditioner is in the third operating mode, the compressor operates while the refrigerant pump is turned off. The second operating mode is suitable for situations where the outdoor ambient temperature is low, the first operating mode is suitable for situations where the outdoor ambient temperature is slightly higher, and the third operating mode is suitable for situations where the outdoor temperature is even higher. Understandably, when the detected outdoor ambient temperature is less than or equal to T1, it indicates that the outdoor ambient temperature is low, and the second operating mode can be selected, i.e., the refrigerant pump runs while the compressor shuts down. However, if the compressor is running at this time, the overall operating pressure of the unit is high. If the compressor is directly shut down and the refrigerant pump is turned on, the rapid change in the unit's operating pressure can easily cause the air conditioner to malfunction. To avoid the above problem, this application detects the compressor's operating status before controlling the air conditioner to enter the second operating mode, and then proceeds with the next control step based on whether the compressor is running.

[0159] Specifically, with the compressor running, the refrigerant pump is turned on to put the air conditioner into the first operating mode. Then, the compressor, refrigerant pump, and outdoor condenser fan are turned off sequentially. Afterward, the refrigerant pump and outdoor condenser fan are turned on sequentially to put the air conditioner into the second operating mode. This allows the unit's operating pressure to change slowly, preventing the air conditioner from freezing due to rapid pressure changes. Furthermore, with the compressor turned off, the refrigerant pump and outdoor condenser fan are turned on sequentially to put the air conditioner into the second operating mode. Understandably, if the compressor is detected to have turned off, it means the unit's operating pressure is not high or the unit is not running, and there is no risk of the air conditioner freezing due to rapid pressure changes. In this case, the refrigerant pump and outdoor condenser fan can be turned on sequentially normally to put the air conditioner into the second operating mode.

[0160] Furthermore, the control device 100 of the air conditioner also includes a judgment unit 170, which is used to determine whether the outdoor ambient temperature is less than T1 based on the detection result of the first detection unit 110, and the judgment unit 170 is also used to determine whether the compressor is running based on the detection result of the second detection unit 120.

[0161] By detecting the compressor's operation before controlling the air conditioner to enter the second working mode, and then controlling the next step based on whether the compressor is running, the air conditioner can avoid freezing due to rapid changes in the unit's operating pressure, thus improving the reliability and stability of the air conditioner's operation.

[0162] In some embodiments, optionally, such as Figure 9 As shown, the air conditioner also includes a condenser, and the control device 100 of the air conditioner further includes: a third detection unit 130, used to detect the condensing pressure of the condenser when the air conditioner enters the second working mode; the control unit 160 is also used to: reduce the speed of the outdoor condenser fan when the condensing pressure is less than P1; increase the speed of the outdoor condenser fan when the condensing pressure is greater than or equal to P1 and less than P2; and control the outdoor condenser fan to run at full speed when the condensing pressure is greater than or equal to P2.

[0163] In this embodiment, the control device 100 of the air conditioner is further defined. The air conditioner also includes a condenser, and when the air conditioner enters the second operating mode, the speed of the outdoor condenser fan can be controlled according to the condensing pressure of the condenser. Therefore, a third detection unit 130 is also provided in the control device 100 of the air conditioner, which is used to detect the condensing pressure of the condenser when the air conditioner enters the second operating mode. The control unit 160 is also used to control the speed of the outdoor condenser fan according to the range of the condensing pressure.

[0164] Specifically, when the condensing pressure is less than P1, the speed of the outdoor condenser fan is reduced; when the condensing pressure is greater than or equal to P1 but less than P2, the speed of the outdoor condenser fan is increased; when the condensing pressure is greater than or equal to P2, the outdoor condenser fan is controlled to run at full speed. Understandably, increasing the speed of the outdoor condenser fan can reduce the condensing pressure. Therefore, by controlling the speed of the outdoor condenser fan to increase or decrease according to the different condensing pressures, the speed of the outdoor condenser fan can be adapted to the condensing pressure. When the condensing pressure is too high, the speed of the outdoor condenser fan is increased; when the condensing pressure is low, the speed of the outdoor condenser fan is decreased. In this way, excessively high condensing pressure can be avoided, energy consumption can be reduced, and the air conditioner can achieve good economic efficiency.

[0165] The judgment unit 170 is also used to determine whether the condensing pressure is less than P1, whether it is greater than or equal to P1 and less than P2, and whether it is greater than or equal to P2.

[0166] In some embodiments, optionally, the control unit 160 is further configured to sequentially turn on the compressor and the refrigerant pump when the outdoor ambient temperature is greater than T1 and less than or equal to T2, so that the air conditioner enters a first operating mode.

[0167] In this embodiment, the control unit 160 is further defined. The air conditioner also has a first operating mode, in which the compressor and refrigerant pump operate simultaneously. The first operating mode is suitable for situations where the outdoor temperature is high. Specifically, when the outdoor ambient temperature is greater than T1 and less than or equal to T2, the control unit 160 sequentially controls the compressor and refrigerant pump to start, so that the air conditioner enters the first operating mode.

[0168] Furthermore, such as Figure 10 As shown, the control device 100 of the air conditioner also includes a fifth detection unit 150, which is used to detect the indoor return air temperature. The control unit 160 is further configured to: increase the compressor speed after the air conditioner enters the first operating mode and when the indoor return air temperature is greater than T4; and decrease the compressor speed after the air conditioner enters the first operating mode and when the indoor return air temperature is less than or equal to T4. The quiet temperature range is 2°C. After the compressor is turned on, the refrigerant pump is activated, and the speed of the refrigerant pump can also be controlled according to the indoor return air temperature.

[0169] The judgment unit 170 is also used to determine whether the indoor return air temperature is greater than T4.

[0170] In some embodiments, optionally, the third detection unit 130 is further configured to detect the condensing pressure when the air conditioner enters the first operating mode; the control unit 160 is further configured to control the outdoor condensing fan speed to decrease when the condensing pressure is less than P3; control the outdoor condensing fan speed to increase when the condensing pressure is greater than or equal to P3 and less than P4; and control the outdoor condensing fan to run at full speed when the condensing pressure is greater than or equal to P4; wherein, P3 is greater than P2.

[0171] In this embodiment, the third detection unit 130 and the control unit 160 are further defined. The air conditioner includes a condenser, and when the air conditioner enters the first operating mode, the speed of the outdoor condenser fan can be controlled according to the condensing pressure of the condenser. Specifically, the third detection unit 130 is used to detect the condensing pressure when the air conditioner enters the first operating mode, and the control unit 160 is used to reduce the speed of the outdoor condenser fan when the condensing pressure is less than P3; increase the speed of the outdoor condenser fan when the condensing pressure is greater than or equal to P3 and less than P4; and control the outdoor condenser fan to run at full speed when the condensing pressure is greater than or equal to P4. Here, P3 is greater than P2. The outdoor condenser fan running at full speed means that the outdoor condenser fan operates at its maximum speed. Understandably, by increasing the speed of the outdoor condenser fan, the condensing pressure can be reduced. Therefore, by controlling the outdoor condenser fan to increase or decrease its speed according to the different condensing pressures, the speed of the outdoor condenser fan can be adapted to the condensing pressure; the speed of the outdoor condenser fan can be increased when the condensing pressure is too high, and decreased when the condensing pressure is low. In this way, excessively high condensing pressure can be avoided, energy consumption can be reduced, and the air conditioner can be made economical.

[0172] The judgment unit 170 is also used to determine whether the condensing pressure is less than P3, whether it is greater than or equal to P3 and less than P4, and whether it is greater than or equal to P4.

[0173] In some embodiments, optionally, the control unit 160 is further configured to turn on the compressor and turn off the refrigerant pump when the outdoor ambient temperature is greater than T2, so that the air conditioner enters a third operating mode.

[0174] In this embodiment, the control unit 160 is further defined. The air conditioner also has a third operating mode. When the air conditioner is in the third operating mode, the compressor runs and the refrigerant pump is turned off. The third operating mode is suitable for situations where the outdoor temperature is very high. Specifically, when the outdoor ambient temperature is greater than T2, the control unit 160 controls the compressor to start and controls the refrigerant pump to turn off, so that the air conditioner enters the third operating mode.

[0175] Furthermore, the control device 100 of the air conditioner also includes a fifth detection unit 150, which is used to detect the indoor return air temperature. The control unit 160 is also used to increase the compressor speed after the air conditioner enters the third operating mode and when the indoor return air temperature is greater than T4; and to decrease the compressor speed after the air conditioner enters the third operating mode and when the indoor return air temperature is less than or equal to T4. The quiet temperature range is 2°C.

[0176] In some embodiments, optionally, the third detection unit 130 is further configured to detect the condensing pressure when the air conditioner enters the third operating mode; the control unit 160 is further configured to control the outdoor condensing fan speed to decrease when the condensing pressure is less than P5; control the outdoor condensing fan speed to increase when the condensing pressure is greater than or equal to P5 and less than P6; and control the outdoor condensing fan to run at full speed when the condensing pressure is greater than or equal to P6; wherein, P5 is greater than P4.

[0177] In this embodiment, the third detection unit 130 and the control unit 160 are further defined. The air conditioner includes a condenser, and when the air conditioner enters the third operating mode, the speed of the outdoor condenser fan can be controlled according to the condensing pressure of the condenser. Specifically, the third detection unit 130 is used to detect the condensing pressure when the air conditioner enters the third operating mode, and the control unit 160 is used to control the speed of the outdoor condenser fan to decrease when the condensing pressure is less than P5; control the speed of the outdoor condenser fan to increase when the condensing pressure is greater than or equal to P5 and less than P6; and control the outdoor condenser fan to run at full speed when the condensing pressure is greater than or equal to P6; wherein P5 is greater than P4. The outdoor condenser fan running at full speed means that the outdoor condenser fan operates at its maximum speed. Understandably, by increasing the speed of the outdoor condenser fan, the condensing pressure can be reduced. Therefore, by controlling the speed of the outdoor condenser fan to increase or decrease according to the different condensing pressures, the speed of the outdoor condenser fan can be adapted to the condensing pressure; the speed of the outdoor condenser fan can be increased when the condensing pressure is too high, and the speed of the outdoor condenser fan can be decreased when the condensing pressure is low. In this way, excessively high condensing pressure can be avoided, energy consumption can be reduced, and the air conditioner can be made economical.

[0178] The judgment unit 170 is also used to determine whether the condensing pressure is less than P5, whether it is greater than or equal to P5 and less than P6, and whether it is greater than or equal to P6.

[0179] In some embodiments, optionally, such as Figure 11 As shown, the control device 100 of the air conditioner further includes: a fourth detection unit 140, used to detect whether the air conditioner meets the mode switching conditions when the air conditioner is operating in the first working mode or the second working mode; the control unit 160 is also used to control the air conditioner to end the first working mode or the second working mode and enter the third working mode when the air conditioner meets the mode switching conditions; wherein, the mode switching conditions include at least one of the following: indoor return air temperature greater than or equal to T3, outdoor ambient temperature greater than T1+2℃, or condensing pressure less than P1.

[0180] In this embodiment, the control device 100 of the air conditioner also includes a fourth detection unit 140. The fourth detection unit 140 detects whether the air conditioner meets the mode switching conditions when operating in the first or second working mode. When the air conditioner meets the mode switching conditions, the control unit 160 controls the air conditioner to end the first or second working mode and enter the third working mode, i.e., turning on the compressor and turning off the refrigerant pump. Specifically, the mode switching conditions are: meeting at least one of the following: indoor return air temperature greater than or equal to T3, outdoor ambient temperature greater than T1+2℃, or condensing pressure less than P1. Understandably, when the air conditioner is in the third working mode, its cooling capacity is stronger than when it is in the first or second working mode. Therefore, when the indoor return air temperature is high, the outdoor ambient temperature is high, or the condensing pressure is low, the air conditioner can be controlled to enter the third working mode to improve its cooling capacity.

[0181] The judgment unit 170 is also used to determine whether the air conditioner meets the mode switching conditions.

[0182] A third aspect of the invention also provides a readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the air conditioner control method as proposed in the first aspect of the invention. Therefore, it possesses all the beneficial technical effects of the air conditioner control method in any possible design of the first aspect described above.

[0183] A fourth aspect of the present invention also provides an air conditioner comprising: a control device 100 for an air conditioner as provided in the second aspect of the present invention; and / or a readable storage medium as provided in the third aspect of the present invention.

[0184] The air conditioner provided in the fourth aspect of the present invention, having the full benefits of the control device 100 and / or the readable storage medium of the air conditioner as proposed in the second aspect of the present invention and / or the readable storage medium of the present invention, has all the advantages of the control device 100 and / or the readable storage medium of the air conditioner.

[0185] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0186] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0187] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, The air conditioner includes a compressor, a refrigerant pump, and an outdoor condenser fan; the control method includes: Detect outdoor ambient temperature; When the outdoor ambient temperature is less than or equal to T1, check whether the compressor is running; With the compressor running, the refrigerant pump is turned on to put the air conditioner into the first operating mode. The compressor, the refrigerant pump, and the outdoor condenser fan are then turned off in sequence. Then, the refrigerant pump and the outdoor condenser fan are turned on in sequence to put the air conditioner into the second operating mode. With the compressor shut down, the refrigerant pump and the outdoor condenser fan are turned on in sequence to put the air conditioner into the second working mode. When the outdoor ambient temperature is greater than T1 and less than or equal to T2, the compressor and the refrigerant pump are turned on in sequence to put the air conditioner into the first working mode. When the outdoor ambient temperature is greater than T2, the compressor is turned on and the refrigerant pump is turned off, so that the air conditioner enters the third working mode.

2. The control method for an air conditioner according to claim 1, characterized in that, The air conditioner further includes a condenser, and the control method further includes: When the air conditioner enters the second operating mode, the condensing pressure of the condenser is detected; When the condensing pressure is less than P1, reduce the speed of the outdoor condensing fan; When the condensing pressure is greater than or equal to P1 and less than P2, the speed of the outdoor condensing fan is increased. When the condensing pressure is greater than or equal to P2, the outdoor condensing fan is controlled to run at full speed.

3. The control method for an air conditioner according to claim 2, characterized in that, The control method further includes: When the air conditioner enters the first operating mode, the condensing pressure is detected; When the condensing pressure is less than P3, the speed of the outdoor condensing fan is reduced. When the condensing pressure is greater than or equal to P3 and less than P4, the speed of the outdoor condensing fan is increased. When the condensing pressure is greater than or equal to P4, the outdoor condensing fan is controlled to run at full speed.

4. The control method for an air conditioner according to claim 2, characterized in that, The control method further includes: When the air conditioner enters the third operating mode, the condensing pressure is detected; When the condensing pressure is less than P5, the speed of the outdoor condensing fan is reduced. When the condensing pressure is greater than or equal to P5 and less than P6, the speed of the outdoor condensing fan is increased. When the condensing pressure is greater than or equal to P6, the outdoor condensing fan is controlled to run at full speed.

5. The control method for an air conditioner according to claim 2, characterized in that, When the air conditioner is operating in the first operating mode or the second operating mode, it is detected whether the air conditioner meets the mode switching conditions. When the air conditioner meets the mode switching conditions, control the air conditioner to end the first working mode or the second working mode and enter the third working mode; The mode switching conditions include at least one of the following: indoor return air temperature is greater than or equal to T3, outdoor ambient temperature is greater than T1+2℃, or condensing pressure is less than P1.

6. A control device for an air conditioner, characterized in that, The air conditioner includes a compressor, a refrigerant pump, and an outdoor condenser fan. The control device for the air conditioner includes: The first detection unit is used to detect the outdoor ambient temperature; The second detection unit is used to detect whether the compressor is running when the outdoor ambient temperature is less than T1. The control unit is configured to, when the compressor is running, turn on the refrigerant pump to put the air conditioner into a first operating mode, turn off the compressor, the refrigerant pump and the outdoor condenser fan in sequence, and turn on the refrigerant pump and the outdoor condenser fan in sequence to put the air conditioner into a second operating mode. The control unit is also used to sequentially turn on the refrigerant pump and the outdoor condenser fan when the compressor is shut down, so that the air conditioner enters the second working mode. The control unit is also used to sequentially turn on the compressor and the refrigerant pump when the outdoor ambient temperature is greater than T1 and less than or equal to T2, so that the air conditioner enters the first working mode. When the outdoor ambient temperature is greater than T2, the compressor is turned on and the refrigerant pump is turned off, so that the air conditioner enters the third working mode.

7. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the control method for an air conditioner as described in any one of claims 1 to 5.

8. An air conditioner, characterized in that, include: The control device for an air conditioner as described in claim 6; and / or The readable storage medium as described in claim 7.

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