Split type air conditioner outdoor fan control method

Abstract

The invention discloses a split type air conditioner outdoor fan control method, and relates to the technical field of air conditioner outdoor fans, and the technical scheme is characterized in that an outdoor fan blade, an outdoor motor, a compressor driving module temperature sensor, an outdoor coil pipe temperature sensor, an outdoor electric control board and an outdoor environment temperature sensor are included; the compressor driving module temperature sensor is used for detecting the temperature of the compressor driving module; the outdoor coil pipe temperature sensor is used for detecting the temperature of the outdoor coil pipe; the outdoor environment temperature sensor is used for detecting the outdoor environment temperature; the compressor driving module temperature, the outdoor coil pipe temperature and the outdoor environment temperature are transmitted to an outdoor electric control board; the outdoor electric control board adjusts the rotating speed of the outdoor motor according to the received temperature of the compressor driving module, the received temperature of the outdoor coil pipe and the received outdoor environment temperature. The control method based on multi-sensor data adjustment can flexibly adjust the rotating speed of the outdoor motor according to the actual temperature condition.

Description

Technical Field

[0001] The present invention relates to the technical field of outdoor fans of air conditioners, and more specifically, to a control method for an outdoor fan of a split-type air conditioner. Background Art

[0002] In modern life, split air conditioners have become an important device for people to adjust indoor temperature and create a comfortable environment. With the improvement of people's quality of life and the increase in attention to energy efficiency, the performance and energy saving of split air conditioners have been paid more and more attention, especially the control technology of its outdoor fan, which has become a key area of ​​industry research and development.

[0003] The control method of the outdoor fan of the traditional split air conditioner is relatively simple, usually using a fixed speed operation mode. In this mode, the outdoor fan always runs at a constant speed regardless of changes in the outdoor ambient temperature, the compressor drive module temperature, and the outdoor coil temperature. This control method has many disadvantages.

[0004] From the perspective of energy saving, fixed speed operation cannot be adjusted according to the actual heat dissipation demand. When the outdoor ambient temperature is low or the air conditioning system load is small, the outdoor fan still runs at a high speed, which undoubtedly causes a waste of electricity. With the continuous increase in energy costs and the increase in environmental awareness, this high-energy consumption operation mode can no longer meet the needs of the market.

[0005] In terms of equipment life, fixed speed operation cannot respond promptly to temperature changes in the compressor drive module and outdoor coil. When the temperature of the compressor drive module rises due to long-term high-load operation, or the temperature of the outdoor coil is abnormal due to insufficient heat exchange, the fixed speed outdoor fan cannot provide sufficient heat dissipation capacity, which will cause the compressor drive module and outdoor coil to be in a high temperature state for a long time, accelerate the aging and damage of the equipment, and increase the maintenance cost and replacement frequency of the equipment.

[0006] From the perspective of air conditioning performance, fixed speed control makes it difficult to ensure that the air conditioner can achieve efficient heat exchange under different working conditions. During the cooling or heating process, changes in outdoor ambient temperature, compressor drive module temperature, and outdoor coil temperature will directly affect the performance of the air conditioner. If the outdoor fan cannot adjust the speed in time according to these changes, it will lead to low heat exchange efficiency, affecting the cooling or heating effect of the air conditioner, and failing to quickly and accurately reach the set indoor temperature, reducing the user experience. Summary of the invention

[0007] In view of the deficiencies in the prior art, an object of the present invention is to provide a method for controlling an outdoor fan of a split-type air conditioner.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A method for controlling an outdoor fan of a split air conditioner comprises an outdoor fan blade, an outdoor motor, a compressor drive module temperature sensor, an outdoor coil temperature sensor, an outdoor electric control panel and an outdoor environment temperature sensor;

[0010] The compressor drive module temperature sensor is used to detect the compressor drive module temperature Tq;

[0011] The outdoor coil temperature sensor is used to detect the outdoor coil temperature Tdef;

[0012] The outdoor environment temperature sensor is used to detect the outdoor environment temperature Tao;

[0013] Transmit the compressor drive module temperature Tq, the outdoor coil temperature Tdef and the outdoor ambient temperature Tao to the outdoor electric control board;

[0014] The outdoor electric control board adjusts the speed of the outdoor motor according to the received compressor drive module temperature Tq, the outdoor coil temperature Tdef and the outdoor ambient temperature Tao;

[0015] The outdoor motor drives the outdoor fan blades to rotate to adjust the heat dissipation efficiency of the outdoor coil.

[0016] Preferably, the outdoor electric control board adjusts the speed of the outdoor motor according to the received compressor drive module temperature Tq, the outdoor coil temperature Tdef and the outdoor ambient temperature Tao, specifically including the following steps:

[0017] The outdoor electric control board adjusts the speed of the outdoor motor in cooling or dehumidification mode according to the received compressor drive module temperature Tq, outdoor coil temperature Tdef and outdoor ambient temperature Tao;

[0018] The outdoor electric control board adjusts the speed of the outdoor motor in the heating mode according to the received outdoor coil temperature Tdef and the outdoor ambient temperature Tao.

[0019] Preferably, the outdoor electric control board adjusts the speed of the outdoor motor in the cooling or dehumidification mode according to the received compressor drive module temperature Tq, the outdoor coil temperature Tdef and the outdoor ambient temperature Tao, specifically comprising the following steps:

[0020] In cooling or dehumidification mode, the outdoor motor starts at the seventh control level P7 speed within the first preset time of starting;

[0021] Determining the outdoor motor speed according to the outdoor ambient temperature Tao within a second preset time after a first preset time when the compressor is initially started;

[0022] After a second preset time from the initial startup of the compressor, determining whether the compressor drive module temperature Tq and the outdoor coil temperature Tdef are equal;

[0023] If the compressor drive module temperature Tq is equal to the outdoor coil temperature Tdef, the outdoor motor speed is controlled based on the outdoor coil temperature Tdef to simulate the condensing pressure and outdoor coil temperature Pd;

[0024] If the compressor drive module temperature Tq and the outdoor coil temperature Tdef are not equal, the outdoor motor speed is controlled according to the compressor drive module temperature Tq.

[0025] Preferably, determining the outdoor motor speed according to the outdoor ambient temperature Tao after a first preset time when the compressor is initially started and within a second preset time specifically comprises the following steps:

[0026] Compare the outdoor ambient temperature Tao with a first preset temperature threshold T1 and a second preset temperature threshold T2;

[0027] If the outdoor ambient temperature Tao ≤ the first preset temperature threshold T1, the speed of the outdoor motor is determined to be the third control level P3;

[0028] If the first preset temperature threshold T1 is less than the outdoor ambient temperature Tao and less than the second preset temperature threshold T2, the rotation speed of the outdoor motor is determined to be the fifth control level P5;

[0029] If the outdoor ambient temperature Tao> the second preset temperature threshold T2, the speed of the outdoor motor is determined to be the sixth control level P6;

[0030] The speed of the outdoor motor at the third control level P3 is smaller than the speed of the outdoor motor at the fifth control level P5; the speed of the outdoor motor at the fifth control level P5 is smaller than the speed of the outdoor motor at the sixth control level P6.

[0031] Preferably, the outdoor electric control board adjusts the speed of the outdoor motor in the heating mode according to the received outdoor coil temperature Tdef and the outdoor ambient temperature Tao, which specifically includes the following steps:

[0032] When the compressor is started during heating, the outdoor motor is started; the outdoor motor is started at the seventh control level P7 speed within the third preset time of starting;

[0033] determining the outdoor motor speed according to the outdoor ambient temperature Tao within a fourth preset time after a third preset time when the compressor is initially started;

[0034] The compressor controls the outdoor motor speed according to the outdoor coil temperature Tdef after a fourth preset time from the initial startup.

[0035] Preferably, determining the outdoor motor speed according to the outdoor ambient temperature Tao after the third preset time when the compressor is initially started and within the fourth preset time specifically comprises the following steps:

[0036] Comparing the outdoor ambient temperature Tao with a third preset temperature threshold T3 and a fourth preset temperature threshold T4;

[0037] If the outdoor ambient temperature Tao is less than the third preset temperature threshold T3, the speed of the outdoor motor is determined to be the seventh control level P7;

[0038] If the third preset temperature threshold T3 ≤ the outdoor ambient temperature Tao < the fourth preset temperature threshold T4, the speed of the outdoor motor is determined to be the fifth control level P5;

[0039] If the outdoor ambient temperature Tao ≥ the fourth preset temperature threshold T4, the speed of the outdoor motor is determined to be the fourth control level P4;

[0040] The speed of the outdoor motor at the fourth control level P4 is smaller than the speed of the outdoor motor at the fifth control level P5; the speed of the outdoor motor at the fifth control level P5 is smaller than the speed of the outdoor motor at the seventh control level P7.

[0041] Preferably, the method further comprises the following steps:

[0042] The outdoor motor stops working within a fifth preset time after the compressor stops working in the heating, cooling or dehumidification mode.

[0043] Preferably, the method further comprises the following steps:

[0044] When the outdoor motor runs for a preset time, the outdoor electric control board will fine-tune the speed of the outdoor motor according to the operating current and voltage fluctuations of the outdoor motor to ensure that the outdoor motor is always in a normal operating state.

[0045] When the outdoor motor runs for a preset time, the outdoor electric control board fine-tunes the speed of the outdoor motor according to the running current and voltage fluctuation of the outdoor motor to ensure that the outdoor motor is always in a normal operating state. The specific steps include:

[0046] The outdoor electric control panel continuously collects the operating current and voltage data of the outdoor motor;

[0047] Compare the current and voltage data collected currently with the data collected last time, and calculate the fluctuation difference of current and voltage;

[0048] If the calculated current and voltage fluctuation differences are within the normal fluctuation range, it means that the outdoor motor is running stably and there is no need to perform speed fine-tuning compensation. The motor can continue to run at the current speed and continue to collect current and voltage data.

[0049] If the current or voltage fluctuation difference exceeds the normal fluctuation range, the outdoor electric control board obtains the speed value that needs to be adjusted for the outdoor motor based on the preset compensation algorithm. When the current is too high and the voltage is too low, the speed of the outdoor motor is appropriately reduced; when the current is too low and the voltage is too high, the speed of the outdoor motor is appropriately increased.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] The control method of the present application based on multi-sensor data adjustment can flexibly adjust the outdoor motor speed according to the actual temperature conditions. When the temperature is low or the heat exchange demand is small, the motor speed is reduced to reduce unnecessary power consumption. By real-time monitoring of the compressor drive module and the outdoor coil temperature and adjusting the heat dissipation, the performance degradation of the compressor drive module and the outdoor coil due to being in a high temperature state for a long time can be effectively avoided. Excessive temperature will accelerate the aging of electronic components and increase the wear of mechanical parts. This control method can timely control the temperature within a reasonable range, reduce the thermal stress of the equipment, extend the service life of the compressor drive module and the outdoor coil, and reduce the frequency of equipment replacement.

[0052] Accurate temperature monitoring and flexible heat dissipation adjustment help improve the overall performance of the air conditioner. Stable temperature control makes the air conditioner more efficient and stable during cooling or heating. For example, when cooling, it can discharge indoor heat to the outside more quickly, so that the indoor temperature quickly reaches the set value; when heating, it ensures that the outdoor unit can defrost normally and improve the heating effect. At the same time, good heat dissipation conditions can also reduce the frequent start and stop of the compressor, reduce noise, and improve the user experience.

[0053] Because this control method takes the outdoor ambient temperature into account, the air conditioner can better adapt to different climate conditions. Whether it is hot summer or cold winter, it can automatically adjust the operating state according to the changes in the external environment to ensure that the air conditioner is always in the best working condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 The present invention provides a structural schematic diagram of a method for controlling an outdoor fan of a split-type air conditioner. DETAILED DESCRIPTION

[0055] Reference Figure 1 shown.

[0056] Embodiment 1 further describes a method for controlling an outdoor fan of a split-type air conditioner proposed by the present invention.

[0057] A split air conditioner outdoor fan control method, comprising an outdoor fan blade 1, an outdoor motor 2, a compressor drive module temperature sensor 3, an outdoor coil temperature sensor 4, an outdoor electric control panel 5 and an outdoor environment temperature sensor 6;

[0058] The compressor drive module temperature sensor 3 is used to detect the compressor drive module temperature Tq;

[0059] The outdoor coil temperature sensor 4 is used to detect the outdoor coil temperature Tdef;

[0060] The outdoor environment temperature sensor 6 is used to detect the outdoor environment temperature Tao;

[0061] Transmit the compressor drive module temperature Tq, the outdoor coil temperature Tdef and the outdoor ambient temperature Tao to the outdoor electric control board 5;

[0062] The outdoor electric control board adjusts the speed of the outdoor motor 2 according to the received compressor drive module temperature Tq, the outdoor coil temperature Tdef and the outdoor ambient temperature Tao;

[0063] The outdoor motor 2 drives the outdoor fan blades 1 to rotate to adjust the heat dissipation efficiency of the outdoor coil.

[0064] In the split-type air-conditioning outdoor fan control system, multiple sensors play a key role in data collection. The compressor drive module temperature sensor 3 monitors the temperature of the compressor drive module in real time, because the compressor drive module will generate heat during operation, and its temperature condition is directly related to the stable operation of itself and the entire compressor. The outdoor coil temperature sensor 4 detects the outdoor coil temperature. The outdoor coil is an important component for heat exchange. Its temperature change reflects the heat exchange efficiency during the cooling or heating process of the air conditioner. The outdoor ambient temperature sensor 6 is used to obtain the outdoor ambient temperature. The high or low ambient temperature has an important influence on the operating conditions of the air conditioner.

[0065] When each sensor completes the temperature data collection, it will transmit the data to the outdoor electric control board 5. Through wired or wireless transmission, the compressor drive module temperature, outdoor coil temperature and outdoor ambient temperature are quickly sent to the outdoor electric control board 5, providing a data basis for subsequent control decisions.

[0066] After receiving data from various sensors, the outdoor electric control board 5 will determine whether the compressor drive module temperature is too high, indicating that it has a heavy workload or a problem with heat dissipation; if the outdoor coil temperature is too high, it may mean that the heat exchange is insufficient; if the outdoor ambient temperature is too high or too low, it will also affect the operating efficiency of the air conditioner. The outdoor electric control board 5 takes these factors into consideration and adjusts the speed of the outdoor motor 2 according to the established control strategy based on different temperature combinations. For example, when the compressor drive module temperature rises and the outdoor coil temperature is also high, the outdoor electric control board 5 will increase the speed of the outdoor motor 2 to enhance the heat dissipation effect.

[0067] After receiving the speed adjustment command from the outdoor electric control board 5, the outdoor motor 2 starts to perform the corresponding action. As a power source, the outdoor motor 2 drives the outdoor fan blade 1 to rotate to adjust the heat dissipation efficiency of the outdoor coil. When the speed of the outdoor motor 2 increases, the rotation speed of the outdoor fan blade 1 increases, and more cold air is blown to the outdoor coil, thereby accelerating the heat dissipation on the surface of the coil, reducing the coil temperature, and also helping to reduce the temperature of the compressor drive module. Conversely, when temperature conditions permit, the speed of the outdoor motor 2 decreases to reduce energy consumption.

[0068] Embodiment 2

[0069] The following technical features are added on the basis of the first embodiment. The outdoor electric control board adjusts the speed of the outdoor motor 2 according to the received compressor drive module temperature Tq, the outdoor coil temperature Tdef and the outdoor ambient temperature Tao. Specifically, the following steps are included:

[0070] The outdoor electric control board adjusts the speed of the outdoor motor 2 in the cooling or dehumidification mode according to the received compressor drive module temperature Tq, the outdoor coil temperature Tdef and the outdoor ambient temperature Tao;

[0071] The outdoor electric control board adjusts the speed of the outdoor motor 2 in the heating mode according to the received outdoor coil temperature Tdef and the outdoor ambient temperature Tao.

[0072] In the cooling or dehumidification mode, the outdoor electric control board 5 needs to comprehensively consider the three key factors of the compressor drive module temperature, the outdoor coil temperature and the outdoor ambient temperature to accurately adjust the speed of the outdoor motor.

[0073] The compressor drive module generates a lot of heat during operation, and its working state directly affects the stability of the entire air conditioning system. When the outdoor electric control board receives a signal that the compressor drive module has a high temperature, it means that the module may be in a high-load working state or have poor heat dissipation. In order to prevent the module from being damaged due to overheating, the outdoor electric control board will increase the speed of the outdoor motor. The high-speed rotating outdoor fan blades will accelerate the air flow and enhance the heat dissipation effect on the compressor drive module, thereby reducing its temperature and ensuring the normal operation of the module.

[0074] The outdoor coil is an important component for heat exchange in the air conditioning system. During the cooling or dehumidification process, the outdoor coil needs to dissipate the heat absorbed indoors to the outdoor environment. If the outdoor electric control panel detects that the outdoor coil temperature is too high, it means that the heat exchange is insufficient, and the outdoor motor speed will be increased. Faster fan blade rotation will bring more cold air, accelerate the heat dissipation on the coil surface, and improve cooling and dehumidification efficiency.

[0075] The outdoor ambient temperature has a significant impact on the cooling and dehumidification effects of the air conditioner. When the outdoor ambient temperature is high, the air conditioning system needs to overcome greater thermal resistance to achieve heat exchange. Based on this situation, the outdoor electric control panel will increase the speed of the outdoor motor accordingly to enhance the heat dissipation capacity and ensure that the air conditioner can operate normally in a high temperature environment. On the contrary, when the outdoor ambient temperature is low, the speed of the outdoor motor can be appropriately reduced to reduce unnecessary energy consumption.

[0076] In heating mode, the outdoor electric control board mainly adjusts the speed of the outdoor motor based on the outdoor coil temperature and the outdoor ambient temperature.

[0077] In heating mode, the function of the outdoor coil is to absorb heat from the outdoor environment. If the temperature of the outdoor coil is too low, it may cause the coil to frost, affecting the heat absorption efficiency. When the outdoor electric control board detects that the temperature of the outdoor coil is close to or below the critical temperature for frost formation, it will reduce the speed of the outdoor motor. This can reduce the air flow speed on the surface of the coil, slow down the heat loss, and avoid frost formation on the coil. When the coil temperature rises to a certain level, the speed of the outdoor motor will be appropriately increased to ensure normal heat exchange.

[0078] The outdoor ambient temperature also affects the heating effect. In a low temperature environment, the outdoor air has less heat, and the air conditioner needs to absorb heat from the outside more efficiently. The outdoor electric control panel will dynamically adjust the speed of the outdoor motor according to the changes in the outdoor ambient temperature. For example, in extremely cold weather, the outdoor motor speed may be appropriately increased to enhance the contact between the air and the coil and improve the heat absorption efficiency.

[0079] This method of adjusting the speed of the outdoor motor according to different modes and multiple factors can significantly reduce the energy consumption of air conditioners. In cooling or dehumidification mode, when various temperature conditions permit, the outdoor motor can run at a lower speed to reduce energy consumption. For example, when the outdoor ambient temperature drops at night, the speed of the outdoor motor is reduced accordingly, which not only meets the heat dissipation needs but also saves electricity. In heating mode, unnecessary energy waste is avoided by reasonably controlling the speed of the outdoor motor. When the outdoor coil temperature is suitable and high-speed operation is not required, reducing the speed can effectively save energy.

[0080] In cooling or dehumidification mode, timely adjusting the speed according to the temperature of the compressor drive module can prevent the module from overheating and damage. Excessive temperature will accelerate the aging and damage of electronic components, and reasonable heat dissipation control can reduce this risk. In heating mode, by monitoring the outdoor coil temperature and adjusting the speed, the coil can be effectively prevented from frosting. Frosting not only affects the heating efficiency, but may also cause coil damage. Therefore, this control method can reduce the frequency of equipment failures, reduce maintenance costs, and improve the reliability and stability of equipment.

[0081] Whether in cooling, dehumidification or heating mode, adjusting the outdoor motor speed based on multiple factors can improve the performance of the air conditioner. In cooling and dehumidification modes, by optimizing the heat dissipation effect of the outdoor coil, the indoor heat can be discharged faster, so that the indoor temperature reaches the set value faster, and the cooling and dehumidification efficiency is improved. In heating mode, reasonable control of the outdoor motor speed can ensure that the outdoor coil absorbs heat from the outdoor environment efficiently and improves the heating effect. Even in severe weather conditions, the air conditioner can operate stably and provide users with a comfortable indoor environment.

[0082] Stable and efficient air conditioning operation can bring users a better user experience. In cooling and dehumidification modes, fast temperature adjustment and stable operation can keep comfortable temperature and humidity indoors. In heating mode, avoiding coil frost and efficient heat absorption can ensure a warm and pleasant indoor temperature. In addition, due to the reasonable adjustment of motor speed, the noise during air conditioning operation will be reduced accordingly, creating a quiet living environment for users.

[0083] This control method enables the air conditioner to better adapt to different climate conditions. In the hot summer, it can automatically increase the outdoor motor speed according to the high temperature environment to ensure the cooling effect; in the cold winter, it can reasonably adjust the speed according to the low temperature conditions to achieve efficient heating.

[0084] Embodiment 3

[0085] The following technical features are added on the basis of the second embodiment. The outdoor electric control board adjusts the speed of the outdoor motor 2 in the cooling or dehumidification mode according to the received compressor drive module temperature Tq, the outdoor coil temperature Tdef and the outdoor ambient temperature Tao, specifically including the following steps:

[0086] In cooling or dehumidification mode, the outdoor motor 2 is started at the seventh control level P7 speed within the first preset time (15s) of starting;

[0087] After a first preset time (15 seconds) of the initial startup of the compressor and within a second preset time (5 minutes), the speed of the outdoor motor 2 is determined according to the outdoor ambient temperature Tao;

[0088] After the second preset time (5 minutes) of the initial startup of the compressor, it is determined whether the compressor drive module temperature Tq and the outdoor coil temperature Tdef are equal;

[0089] If the compressor drive module temperature Tq is equal to the outdoor coil temperature Tdef, the speed of the outdoor motor 2 is controlled according to the outdoor coil temperature Tdef simulating the condensing pressure outdoor coil temperature Pd;

[0090] If the compressor drive module temperature Tq and the outdoor coil temperature Tdef are not equal, the speed of the outdoor motor 2 is controlled according to the compressor drive module temperature Tq.

[0091] The control level of the outdoor motor 2 speed (the speed of the outdoor motor 2 at each level is the data of the air conditioning control board E side and is adjustable).

[0092]

[0093] Speed ​​regulation in cooling or dehumidification mode. When the cooling or dehumidification mode is started, the outdoor motor 2 starts at the seventh control level speed within the first preset time. This is a pre-set startup strategy. The seventh control level speed is determined by comprehensively considering factors such as the overall stability of the air-conditioning system when it is started and the initial heat dissipation requirements. At the moment of startup, the air-conditioning system needs to quickly enter the working state. The higher initial speed can ensure that the outdoor fan blades 1 quickly drive the air flow, provide preliminary heat dissipation for the compressor drive module and the outdoor coil, and enable the system to reach stable operation conditions as soon as possible. For example, when starting the cooling mode in hot weather, a higher initial speed can speed up the heat dissipation of the outdoor coil and reduce the heat load when the compressor starts.

[0094] After the first preset time and within the second preset time, after the first preset time when the compressor is initially started and within the second preset time, the outdoor electric control board determines the rotation speed of the outdoor motor 2 according to the outdoor ambient temperature. The outdoor ambient temperature is one of the important factors affecting the refrigeration or dehumidification effect of the air conditioner. When the outdoor ambient temperature is high, the air conditioner needs a larger heat dissipation power to achieve the refrigeration or dehumidification function. At this time, the outdoor electric control board will increase the rotation speed of the outdoor motor 2, allowing the outdoor fan blade 1 to rotate at a faster speed, increase the contact between the air and the outdoor coil and the compressor drive module, and improve the heat dissipation efficiency. On the contrary, when the outdoor ambient temperature is low, the rotation speed of the outdoor motor 2 can be appropriately reduced to reduce unnecessary energy consumption. For example, in the evening, the outdoor temperature drops, and the rotation speed of the outdoor motor 2 can be lowered accordingly.

[0095] After the second preset time when the compressor is first started, the outdoor electric control board will determine whether the compressor drive module temperature is equal to the outdoor coil temperature, and then adopt different control strategies based on the judgment result.

[0096] If the temperature of the compressor drive module is equal to the outdoor coil temperature, it means that the thermal states of the two are relatively consistent. At this time, the speed of the outdoor motor 2 is controlled by simulating the condensing pressure outdoor coil temperature according to the outdoor coil temperature. The condensing pressure is closely related to the outdoor coil temperature. By simulating the condensing pressure outdoor coil temperature, the actual operating conditions of the air-conditioning system can be more accurately reflected. When the simulated condensing pressure outdoor coil temperature is high, it indicates that the system needs stronger heat dissipation capacity, and the outdoor electric control board will increase the speed of the outdoor motor 2; otherwise, it will reduce the speed. For example, after a long period of high-load operation, the temperatures of the outdoor coil and the compressor drive module both rise and are equal. At this time, the simulated condensing pressure outdoor coil temperature is also high, and the outdoor motor 2 will increase the speed to enhance heat dissipation.

[0097] If the temperature of the compressor drive module is not equal to the temperature of the outdoor coil, the outdoor electric control board controls the speed of the outdoor motor 2 according to the temperature of the compressor drive module. The compressor drive module is a key component in the air-conditioning system, and its working state directly affects the stability and performance of the system. When the temperature of the compressor drive module is high, in order to avoid damage due to overheating, the outdoor electric control board will increase the speed of the outdoor motor 2, speed up the heat dissipation, and ensure that the compressor drive module operates within a safe temperature range. For example, when the compressor runs for a long time at a high frequency, the temperature of the compressor drive module may rise rapidly, and at this time the outdoor motor 2 will increase the speed to dissipate heat.

[0098] In the heating mode, the outdoor electric control board mainly adjusts the speed of the outdoor motor 2 based on the outdoor coil temperature and the outdoor ambient temperature. The outdoor coil needs to absorb heat from the outdoor environment during the heating process, and the outdoor ambient temperature determines how much heat can be absorbed. When the outdoor ambient temperature is low and the outdoor coil temperature is close to the frosting temperature, the speed of the outdoor motor 2 will decrease, reducing air flow, slowing down the heat loss of the coil, and preventing frosting. When the outdoor ambient temperature rises or the outdoor coil temperature rises to a certain level, the speed of the outdoor motor 2 will increase appropriately to enhance the heat exchange efficiency.

[0099] This staged, multi-factor control method can accurately adjust the speed of the outdoor motor 2 according to different operating stages and actual working conditions, thereby achieving energy saving and consumption reduction. In the startup phase, although the higher seventh control level speed is used for startup, this is only a short-term operation, which can quickly stabilize the system and avoid energy waste caused by a long startup process. In the subsequent operation process, the speed is dynamically adjusted according to the changes in the outdoor ambient temperature, the compressor drive module temperature and the outdoor coil temperature, avoiding unnecessary energy consumption under the traditional fixed speed operation mode. For example, when the outdoor ambient temperature is low, the speed of the outdoor motor 2 is reduced, reducing power consumption; when the temperature of the compressor drive module is not high, the speed will not be excessively increased for heat dissipation, effectively saving energy.

[0100] By precisely controlling the speed of the outdoor motor 2, the key components of the air conditioning system can be effectively protected and the service life of the equipment can be extended. In the cooling or dehumidification mode, the heat dissipation intensity is adjusted in time according to the changes in the temperature of the compressor drive module and the temperature of the outdoor coil, avoiding aging and damage of the components due to being in a high temperature state for a long time. For example, when the temperature of the compressor drive module is too high, the speed of the outdoor motor 2 is increased in time to dissipate heat to prevent the module from overheating and damage; in the heating mode, the outdoor coil is prevented from frosting by reasonably controlling the speed of the outdoor motor 2, reducing the damage to the coil caused by frosting. This can reduce the maintenance frequency and replacement cost of the equipment and improve the reliability and stability of the equipment.

[0101] This control method enables the air conditioner to maintain good performance in different operating modes. In cooling or dehumidification mode, adjusting the speed of the outdoor motor 2 according to multiple factors can improve the heat dissipation efficiency of the outdoor coil and the compressor drive module, so that the air conditioner can reach the set temperature and humidity requirements more quickly, and improve the cooling and dehumidification effects. In heating mode, reasonable control of the speed of the outdoor motor 2 can ensure that the outdoor coil efficiently absorbs heat from the outdoor environment and improves heating efficiency. Even under complex climatic conditions, the air conditioner can operate stably and provide users with a comfortable indoor environment.

[0102] This control method takes into full account a variety of environmental factors and system operating conditions, making the air conditioning system more adaptable. Regardless of the different outdoor ambient temperatures or the different temperature states of the compressor drive module and the outdoor coil, the air conditioner can adjust the speed of the outdoor motor 2 according to the actual situation to ensure that the system can operate normally under various working conditions. For example, in a high temperature and high humidity environment, the heat dissipation and dehumidification capabilities can be enhanced by increasing the speed; in a low temperature environment, the coil can be prevented from frosting by reducing the speed to ensure the heating effect.

[0103] Embodiment 4

[0104] The following technical features are added on the basis of the third embodiment: after the first preset time when the compressor is initially started and within the second preset time, the speed of the outdoor motor 2 is determined according to the outdoor ambient temperature Tao, specifically including the following steps:

[0105] Compare the outdoor ambient temperature Tao with a first preset temperature threshold T1 and a second preset temperature threshold T2;

[0106] If the outdoor ambient temperature Tao ≤ the first preset temperature threshold T1, the speed of the outdoor motor 2 is determined to be the third control level P3;

[0107] If the first preset temperature threshold T1 is less than the outdoor ambient temperature Tao and less than the second preset temperature threshold T2, the rotation speed of the outdoor motor 2 is determined to be the fifth control level P5;

[0108] If the outdoor ambient temperature Tao> the second preset temperature threshold T2, the speed of the outdoor motor 2 is determined to be the sixth control level P6;

[0109] The rotation speed of the outdoor motor 2 at the third control level P3 is less than that at the fifth control level P5; and the rotation speed of the outdoor motor 2 at the fifth control level P5 is less than that at the sixth control level P6.

[0110] When the compressor is started for the first time, determine the speed of outdoor motor 2 according to the following table and keep it constant within 5 minutes:

[0111]

[0112] The control method accurately adjusts the speed of the outdoor motor 2 according to the outdoor ambient temperature, thereby maximizing energy saving. Under different outdoor temperature conditions, the air conditioner can automatically select the appropriate control level speed to operate. When the outdoor temperature is low, it runs at the third control level with a low speed, reducing unnecessary power consumption; when the temperature is moderate or high, it runs at the fifth and sixth control levels, respectively, which not only meets the heat dissipation requirements but also avoids excessive energy consumption. Compared with traditional air conditioners running at a fixed speed, this intelligent control method can save users a lot of electricity bills, and it is also in line with the social development trend of environmental protection and energy saving.

[0113] Precise speed regulation helps protect key air conditioner components. In cooling or dehumidification mode, the speed is properly adjusted according to the outdoor ambient temperature to prevent damage to the compressor drive module and outdoor coil due to excessive or insufficient heat dissipation. For example, running at a lower speed in a low temperature environment reduces the wear of the motor and components; running at a higher speed in a high temperature environment effectively dissipates heat and prevents components from aging due to overheating. In heating mode, the speed is properly controlled to prevent frost on the outdoor coil, reducing the risk of coil damage. Therefore, this control method can reduce the maintenance frequency and replacement cost of the equipment and extend the overall service life of the equipment.

[0114] Through phased, multi-factor speed adjustment, the air conditioner can maintain good performance in different operating modes and environmental conditions. In cooling or dehumidification mode, timely adjustment of the speed according to the outdoor ambient temperature can improve the heat dissipation efficiency of the outdoor coil and compressor drive module, so that the air conditioner can reach the set temperature and humidity requirements more quickly, and improve the cooling and dehumidification effect. In heating mode, reasonable speed control ensures that the outdoor coil absorbs heat efficiently and improves heating efficiency. Even in extreme climatic conditions, the air conditioner can operate stably and provide users with a comfortable indoor environment.

[0115] This control method takes full account of the changes in outdoor ambient temperature, making the air conditioning system more adaptable. Whether it is cold winter, hot summer, or mild weather in spring and autumn, the air conditioner can automatically adjust the speed of the outdoor motor 2 according to the outdoor temperature to ensure that the system can operate normally under various working conditions. In different regions and different climatic conditions, the air conditioner can perform at its best and meet the user's needs.

[0116] Embodiment 5

[0117] The following technical features are added on the basis of the fourth embodiment. The outdoor electric control board adjusts the speed of the outdoor motor 2 in the heating mode according to the received outdoor coil temperature Tdef and the outdoor ambient temperature Tao, specifically including the following steps:

[0118] When the compressor is started during heating, the outdoor motor 2 is started; the outdoor motor 2 is started at the seventh control level P7 speed within the third preset time of starting;

[0119] After a third preset time (15s) when the compressor is initially started and within a fourth preset time, the rotation speed of the outdoor motor 2 is determined according to the outdoor ambient temperature Tao;

[0120] After a fourth preset time (5 minutes) from the initial startup of the compressor, the speed of the outdoor motor 2 is controlled according to the outdoor coil temperature Tdef.

[0121] The control level of outdoor fan blade 1 is 3 levels:

[0122]

[0123] After the third preset time when the compressor is initially started and within the fourth preset time, the rotation speed of the outdoor motor 2 is determined according to the outdoor ambient temperature Tao, specifically including the following steps:

[0124] Comparing the outdoor ambient temperature Tao with a third preset temperature threshold T3 and a fourth preset temperature threshold T4;

[0125] If the outdoor ambient temperature Tao is less than the third preset temperature threshold T3, the rotation speed of the outdoor motor 2 is determined to be the seventh control level P7;

[0126] If the third preset temperature threshold T3 ≤ the outdoor ambient temperature Tao < the fourth preset temperature threshold T4, the rotation speed of the outdoor motor 2 is determined to be the fifth control level P5;

[0127] If the outdoor ambient temperature Tao ≥ the fourth preset temperature threshold T4, the speed of the outdoor motor 2 is determined to be the fourth control level P4;

[0128] The rotation speed of the outdoor motor 2 at the fourth control level P4 is less than that at the fifth control level P5; and the rotation speed of the outdoor motor 2 at the fifth control level P5 is less than that at the seventh control level P7.

[0129] When the compressor is started for the first time, determine the outdoor motor speed according to the following table and keep it constant within 5 minutes:

[0130]

[0131] The following steps are also included:

[0132] The outdoor motor 2 stops working within a fifth preset time after the compressor stops working in the heating, cooling or dehumidification mode.

[0133] When heating, the compressor starts, and the outdoor motor 2 starts synchronously, and runs at the seventh control level speed within the third preset time. This enables the outdoor unit to quickly start absorbing heat from the outdoor environment, prepare for indoor heating, and speed up the heating startup speed.

[0134] The outdoor ambient temperature is compared with the third preset temperature threshold and the fourth preset temperature threshold to determine the speed of the outdoor motor 2 from the third preset time to the fourth preset time:

[0135] If the outdoor ambient temperature Tao is less than the third preset temperature threshold T3, the speed of the outdoor motor 2 is determined to be the seventh control level P7;

[0136] If the third preset temperature threshold T3 ≤ the outdoor ambient temperature Tao < the fourth preset temperature threshold T4, the rotation speed of the outdoor motor 2 is determined to be the fifth control level P5;

[0137] If the outdoor ambient temperature Tao ≥ the fourth preset temperature threshold T4, the speed of the outdoor motor 2 is determined to be the fourth control level P4. At higher temperatures, reducing the speed can avoid excessive heat dissipation while meeting the heating demand.

[0138] After the fourth preset time, the speed of the outdoor motor 2 is controlled according to the outdoor coil temperature. If the outdoor coil temperature is low, it may be frosted, and the speed is reduced to slow down the air flow to prevent frosting; if the temperature is normal, the speed is appropriately adjusted to ensure heat absorption and exchange efficiency.

[0139] In the heating, cooling or dehumidification mode, the outdoor motor 2 stops working within the fifth preset time after the compressor stops working. This is to allow the outdoor unit to have a certain amount of time to complete the remaining heat exchange or heat dissipation process after the compressor stops, and then stop the motor to save energy.

[0140] Embodiment 6

[0141] The following technical features are added on the basis of the fifth embodiment, and the following steps are also included:

[0142] When the running time of the outdoor motor 2 reaches a preset time, the outdoor electric control board 5 fine-tunes the speed of the outdoor motor 2 according to the running current and voltage fluctuation of the outdoor motor 2 to ensure that the outdoor motor 2 is always in a normal running state, which specifically includes the following steps:

[0143] The outdoor electric control panel 5 continuously collects the operating current and voltage data of the outdoor motor 2;

[0144] Compare the current and voltage data collected currently with the data collected last time, and calculate the fluctuation difference of current and voltage;

[0145] If the calculated current and voltage fluctuation differences are within the normal fluctuation range, it means that the outdoor motor 2 is running stably and there is no need to perform speed fine-tuning compensation. The current speed is maintained and current and voltage data are continuously collected.

[0146] If the current or voltage fluctuation difference exceeds the normal fluctuation range, the outdoor electric control board 5 obtains the speed value that needs to be adjusted for the outdoor motor 2 according to the preset compensation algorithm. When the current is too high and the voltage is too low, the speed of the outdoor motor 2 is appropriately reduced; when the current is too low and the voltage is too high, the speed of the outdoor motor 2 is appropriately increased.

[0147] When the running time of the outdoor motor 2 reaches the preset time, the outdoor electric control board 5 starts fine monitoring of the running status of the outdoor motor 2. It continuously collects the running current and voltage data of the outdoor motor 2. This is the basis of the entire fine-tuning compensation process, because current and voltage are key parameters reflecting the running status of the motor. The outdoor electric control board 5 can understand the real-time working status of the motor by monitoring the motor current and voltage. The accurate collection of these data provides a reliable basis for subsequent analysis and decision-making.

[0148] After collecting the current current and voltage data, the outdoor electric control panel 5 will compare it with the data collected last time. Through this comparison, the fluctuation difference of the current and voltage is calculated. This fluctuation difference can intuitively reflect the changes in the motor's operating state. Under normal circumstances, when the motor is running stably, the current and voltage will fluctuate within a certain range. Therefore, it is necessary to set a normal fluctuation range as a reference standard.

[0149] If the calculated current and voltage fluctuation differences are within the normal fluctuation range, it indicates that the outdoor motor 2 is in a stable operating state. At this time, the outdoor electric control board 5 will make a decision that there is no need to perform speed fine-tuning compensation, and let the motor continue to run at the current speed. At the same time, in order to continuously monitor the motor status, the outdoor electric control board 5 will continue to collect current and voltage data.

[0150] Once the current or voltage fluctuation difference exceeds the normal fluctuation range, it means that the running state of the motor is abnormal. The outdoor electric control board 5 will immediately start the preset compensation algorithm, and calculate the speed value that the outdoor motor 2 needs to adjust according to the specific fluctuation of the current and voltage. Specifically, when the current is too high and the voltage is too low, this may mean that the motor load is too large or there is a circuit fault. In order to avoid damage to the motor due to overload, the outdoor electric control board 5 will appropriately reduce the speed of the outdoor motor 2 to reduce the burden on the motor. On the contrary, when the current is too low and the voltage is too high, it may mean that the motor load is too small or there are other abnormal conditions. At this time, the outdoor electric control board 5 will appropriately increase the speed of the outdoor motor 2 to restore the motor to a normal working state.

[0151] By real-time monitoring and dynamic adjustment of the operating current and voltage of the outdoor motor 2, abnormal fluctuations in the operation of the motor can be discovered in time, and corresponding compensation measures can be taken. This is like installing an intelligent "protective cover" for the motor to ensure that the motor always runs in a stable state. In practical applications, after a long period of operation, the motor may be affected by various factors, such as changes in ambient temperature, mechanical wear, etc., resulting in fluctuations in current and voltage. If these fluctuations are not adjusted in time, they may gradually intensify and eventually lead to motor failure. However, this control method can perform fine-tuning compensation at the early stage of the fluctuation, effectively avoiding damage to the motor due to abnormal fluctuations and extending the service life of the motor.

[0152] Improve the overall performance of air conditioning

[0153] The stable operation of the outdoor motor 2 is crucial to the overall performance of the air conditioner. During the cooling or heating process, the outdoor motor drives the outdoor fan blades to rotate to achieve heat dissipation or heat absorption of the outdoor coil. If the motor runs unstably, it will directly affect the heat exchange efficiency of the outdoor coil, and then affect the cooling or heating effect of the air conditioner. By fine-tuning and compensating the motor speed, the stable rotation of the outdoor fan blades is ensured, so that the outdoor coil can always maintain a good heat exchange state. In this way, the air conditioner can achieve cooling or heating functions more efficiently, quickly reach the set temperature, and improve the user experience.

[0154] During the operation of the motor, abnormal current and voltage fluctuations often lead to increased motor energy consumption. For example, when the current is too high, the motor needs to consume more power to overcome the excessive load; and excessive voltage may cause unnecessary losses in the motor. By fine-tuning the motor speed, the motor can run in a stable state, avoiding additional energy consumption caused by abnormal fluctuations. At the same time, by reasonably adjusting the speed according to the actual current and voltage, the motor can maintain the best energy efficiency ratio under different working conditions, further reducing the overall energy consumption of the air conditioner and saving electricity expenses for users.

[0155] In a split air conditioning system, the outdoor motor is a key component, and its operating status directly affects the reliability of the entire system. This control method improves the reliability of the motor by accurately monitoring and timely adjusting the operating status of the motor, thereby enhancing the reliability of the entire air conditioning system. In actual use, the number of air conditioning shutdowns and repairs caused by motor failures is reduced, reducing the user's use and maintenance costs. At the same time, a stable and reliable air conditioning system can also provide users with a more comfortable and secure use environment.

[0156] This control method of fine-tuning the motor speed based on current and voltage fluctuations reflects the intelligence level of the air conditioning system. The outdoor electric control panel can automatically collect data, analyze and judge, and make decisions without human intervention. This is in line with the development trend of modern smart homes and provides users with a more convenient and efficient user experience. Users only need to set the basic parameters of the air conditioner, and the air conditioning system can automatically adjust according to the operating status of the motor to ensure that it is always in the best working condition.

[0157] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling an outdoor fan of a split air conditioner, characterized in that: It comprises an outdoor fan blade (1), an outdoor motor (2), a compressor drive module temperature sensor (3), an outdoor coil temperature sensor (4), an outdoor electric control panel (5) and an outdoor environment temperature sensor (6); The compressor drive module temperature sensor (3) is used to detect the compressor drive module temperature Tq; The outdoor coil temperature sensor (4) is used to detect the outdoor coil temperature Tdef; The outdoor environment temperature sensor (6) is used to detect the outdoor environment temperature Tao; Transmitting the compressor drive module temperature Tq, the outdoor coil temperature Tdef and the outdoor ambient temperature Tao to the outdoor electric control board (5); The outdoor electric control board adjusts the rotation speed of the outdoor motor (2) according to the received compressor drive module temperature Tq, the outdoor coil temperature Tdef and the outdoor ambient temperature Tao; The outdoor motor (2) drives the outdoor fan blades (1) to rotate so as to adjust the heat dissipation efficiency of the outdoor coil.

2. A split-type air conditioner outdoor fan control method according to claim 1, characterized in that: The outdoor electric control board adjusts the speed of the outdoor motor (2) according to the received compressor drive module temperature Tq, the outdoor coil temperature Tdef and the outdoor environment temperature Tao, specifically comprising the following steps: The outdoor electric control board adjusts the speed of the outdoor motor (2) in the cooling or dehumidification mode according to the received compressor drive module temperature Tq, the outdoor coil temperature Tdef and the outdoor ambient temperature Tao; The outdoor electric control panel adjusts the rotation speed of the outdoor motor (2) in the heating mode according to the received outdoor coil temperature Tdef and the outdoor ambient temperature Tao.

3. A split-type air conditioner outdoor fan control method according to claim 2, characterized in that: The outdoor electric control board adjusts the speed of the outdoor motor (2) in the cooling or dehumidification mode according to the received compressor drive module temperature Tq, the outdoor coil temperature Tdef and the outdoor environment temperature Tao, specifically comprising the following steps: In cooling or dehumidification mode, the outdoor motor (2) is started at a seventh control level P7 speed within a first preset time of starting; Determining the rotation speed of the outdoor motor (2) according to the outdoor ambient temperature Tao after a first preset time after the compressor is initially started and within a second preset time; After a second preset time from the initial startup of the compressor, determining whether the compressor drive module temperature Tq and the outdoor coil temperature Tdef are equal; If the compressor drive module temperature Tq is equal to the outdoor coil temperature Tdef, the speed of the outdoor motor (2) is controlled according to the outdoor coil temperature Tdef simulating the condensing pressure and the outdoor coil temperature Pd; If the compressor drive module temperature Tq and the outdoor coil temperature Tdef are not equal, the speed of the outdoor motor (2) is controlled according to the compressor drive module temperature Tq.

4. A split-type air conditioner outdoor fan control method according to claim 3, characterized in that: Determining the rotation speed of the outdoor motor (2) according to the outdoor ambient temperature Tao after a first preset time when the compressor is initially started and within a second preset time specifically comprises the following steps: Compare the outdoor ambient temperature Tao with a first preset temperature threshold T1 and a second preset temperature threshold T2; If the outdoor ambient temperature Tao ≤ the first preset temperature threshold T1, the rotation speed of the outdoor motor (2) is determined to be the third control level P3; If the first preset temperature threshold T1 is less than the outdoor ambient temperature Tao and the second preset temperature threshold T2 is less than the outdoor ambient temperature Tao, the rotation speed of the outdoor motor (2) is determined to be the fifth control level P5; If the outdoor ambient temperature Tao> the second preset temperature threshold T2, the rotation speed of the outdoor motor (2) is determined to be the sixth control level P6; The rotation speed of the outdoor motor (2) at the third control level P3 is smaller than the rotation speed of the outdoor motor (2) at the fifth control level P5; and the rotation speed of the outdoor motor (2) at the fifth control level P5 is smaller than the rotation speed of the outdoor motor (2) at the sixth control level P6.

5. A split-type air conditioner outdoor fan control method according to claim 2, characterized in that: The outdoor electric control board adjusts the speed of the outdoor motor (2) in the heating mode according to the received outdoor coil temperature Tdef and the outdoor ambient temperature Tao, specifically comprising the following steps: When the compressor is started during heating, the outdoor motor (2) is started; the outdoor motor (2) is started at the seventh control level P7 speed within a third preset time of starting; determining the rotation speed of the outdoor motor (2) according to the outdoor ambient temperature Tao after a third preset time after the compressor is initially started and within a fourth preset time; The compressor controls the speed of the outdoor motor (2) according to the outdoor coil temperature Tdef after a fourth preset time from the initial startup.

6. A split-type air conditioner outdoor fan control method according to claim 5, characterized in that: Determining the rotation speed of the outdoor motor (2) according to the outdoor ambient temperature Tao after the third preset time of the initial startup of the compressor and within the fourth preset time specifically comprises the following steps: Comparing the outdoor ambient temperature Tao with a third preset temperature threshold T3 and a fourth preset temperature threshold T4; If the outdoor ambient temperature Tao is less than the third preset temperature threshold T3, the rotation speed of the outdoor motor (2) is determined to be the seventh control level P7; If the third preset temperature threshold value T3 ≤ the outdoor ambient temperature Tao < the fourth preset temperature threshold value T4, the rotation speed of the outdoor motor (2) is determined to be the fifth control level P5; If the outdoor ambient temperature Tao ≥ a fourth preset temperature threshold T4, the rotation speed of the outdoor motor (2) is determined to be a fourth control level P4; The rotation speed of the outdoor motor (2) at the fourth control level P4 is less than the rotation speed of the outdoor motor (2) at the fifth control level P5; and the rotation speed of the outdoor motor (2) at the fifth control level P5 is less than the rotation speed of the outdoor motor (2) at the seventh control level P7.

7. A split-type air conditioner outdoor fan control method according to claim 1, characterized in that: The following steps are also included: The outdoor motor (2) stops working within a fifth preset time after the compressor stops working in the heating, cooling or dehumidification mode.

8. A split-type air conditioner outdoor fan control method according to claim 7, characterized in that: The following steps are also included: When the operation time of the outdoor motor (2) reaches a preset time, the outdoor electric control panel (5) fine-tunes the rotation speed of the outdoor motor (2) according to the operating current and voltage fluctuation of the outdoor motor (2), so as to ensure that the outdoor motor (2) is always in a normal operating state.

9. A split-type air conditioner outdoor fan control method according to claim 8, characterized in that: When the running time of the outdoor motor (2) reaches a preset time, the outdoor electric control panel (5) fine-tunes the rotation speed of the outdoor motor (2) according to the running current and voltage fluctuation of the outdoor motor (2) to ensure that the outdoor motor (2) is always in a normal running state, specifically comprising the following steps: The outdoor electric control panel (5) continuously collects the operating current and voltage data of the outdoor motor (2); Compare the current and voltage data collected currently with the data collected last time, and calculate the fluctuation difference of current and voltage; If the calculated current and voltage fluctuation differences are both within the normal fluctuation range, it means that the outdoor motor (2) is running stably and there is no need to perform speed fine-tuning compensation. The current speed is maintained and current and voltage data are continuously collected. If the current or voltage fluctuation difference exceeds the normal fluctuation range, the outdoor electric control panel (5) obtains the speed value that needs to be adjusted for the outdoor motor (2) according to a preset compensation algorithm. When the current is too high and the voltage is too low, the speed of the outdoor motor (2) is appropriately reduced; when the current is too low and the voltage is too high, the speed of the outdoor motor (2) is appropriately increased.

Images