Rotating speed control method and device for outdoor fan of air conditioner

Abstract

The invention discloses a rotating speed control method and device for an outdoor fan of an air conditioner, and the method comprises the steps: collecting the outdoor environment temperature and air conditioner operation parameters in real time in a refrigeration mode; according to the outdoor environment temperature, the air conditioner working condition corresponding to the outdoor environment temperature is determined in a pre-established temperature interval; and according to the air conditioner working conditions, the air conditioner operation calculation coefficients corresponding to the air conditioner working conditions are called, and the final rotating speed of the outdoor fan is calculated in combination with the air conditioner operation parameters. The current working condition of the air conditioner refrigeration system is determined according to the outdoor environment temperature, the operation calculation coefficient matched with the air conditioner working condition is called according to the determined air conditioner working condition, continuous adjustment of the outdoor draught fan is achieved, the rotating speed of the outdoor draught fan can accurately match the heat dissipation air volume requirement under the current working condition, and the heat dissipation efficiency is improved. The reliability problems of extra noise, too low condensation temperature and the like caused by continuous operation of the fan in an unnecessary high-rotating-speed interval are avoided, or energy waste caused by continuous high-power refrigeration of an air conditioner refrigeration system due to the fact that the rotating speed of the fan cannot meet the heat dissipation requirement under the current working condition is avoided.

Description

TECHNICAL FIELD The present application relates to the technical field of air conditioners, and in particular to a rotational speed control method and control device for an outdoor fan of an air conditioner. BACKGROUND The outdoor fan, as a core heat dissipation component of an air conditioning refrigeration system, is installed in an outdoor housing and arranged opposite to a condenser, and releases heat generated by the refrigerant in the condensation process to the external environment through forced convection, thereby playing an important role in the air conditioning cycle. The rotational speed of the outdoor fan directly determines the heat exchange efficiency of the condensation side, and the control precision directly affects the overall energy efficiency ratio, operating noise and system reliability.

[0001] In existing air conditioning systems, the outdoor fan generally adopts fixed-speed operation or discrete step speed control. Due to the fixed-speed operation or discrete step speed control, the output is only a few fixed speed points, which directly leads to a mismatch between the rotational speed of the outdoor fan and the current heat dissipation demand when the outdoor temperature changes, resulting in the outdoor fan continuously operating in an unnecessary high speed range, causing additional noise, low condensation temperature and other reliability problems. SUMMARY To solve the technical problems that the rotational speed of the outdoor fan cannot be accurately matched with the current heat dissipation demand, the outdoor fan continuously operates in an unnecessary high speed range, causing additional noise, low condensation temperature and other reliability problems, the present application proposes a rotational speed control method and control device for an outdoor fan of an air conditioner.

[0002] The present application is implemented by the following technical solutions: A rotational speed control method for an outdoor fan of an air conditioner, comprising: In the refrigeration mode, real-time acquisition of the outdoor environment temperature and the air conditioner operating parameters; According to the outdoor environment temperature, determining the air conditioner operating condition corresponding to the outdoor environment temperature in the pre-established temperature interval; According to the air conditioner operating condition, calling the air conditioner operating calculation coefficient corresponding to the air conditioner operating condition, and combining the air conditioner operating parameters to calculate the final rotational speed of the outdoor fan.

[0003] By adopting the above technical solution, the current air conditioner refrigeration system operating condition is determined according to the outdoor environment temperature, and the operating calculation coefficient adapted to the air conditioner operating condition is called according to the determined air conditioner operating condition, so as to realize continuous adjustment of the outdoor fan, so that the rotational speed of the outdoor fan can accurately match the heat dissipation air volume demand under the current operating condition, avoid the outdoor fan continuously operating in an unnecessary high speed range, causing additional noise, low condensation temperature and other reliability problems, or the rotational speed of the outdoor fan cannot meet the heat dissipation demand under the current operating condition, causing the air conditioner refrigeration system to continuously operate at high power, resulting in energy waste.

[0004] The speed control method of the outdoor fan of the air conditioner as described above, the pre-established temperature interval includes: The first temperature interval: The air conditioner working condition corresponding to the first temperature interval is high temperature working condition; The second temperature interval: The air conditioner working condition corresponding to the second temperature interval is medium-high temperature working condition; The third temperature interval: The air conditioner working condition corresponding to the third temperature interval is normal temperature working condition; The fourth temperature interval: The air conditioner working condition corresponding to the fourth temperature interval is low temperature working condition.

[0005] The speed control method of the outdoor fan of the air conditioner as described above, when the air conditioner working condition is high temperature working condition, the outdoor fan of the air conditioner runs at the highest speed.

[0006] The speed control method of the outdoor fan of the air conditioner as described above, according to the air conditioner working condition, the air conditioner running calculation coefficient corresponding to the air conditioner working condition is called, and the final speed of the outdoor fan is calculated combined with the air conditioner running parameter, including: According to the called air conditioner running calculation coefficient, the target speed percentage of the outdoor fan under the current air conditioner working condition is calculated combined with the air conditioner running parameter; The target speed percentage of the outdoor fan is multiplied by the highest speed of the outdoor fan to obtain the final speed of the outdoor fan.

[0007] The speed control method of the outdoor fan of the air conditioner as described above, the target speed percentage of the outdoor fan under the current air conditioner working condition is calculated according to the called air conditioner running calculation coefficient combined with the air conditioner running parameter The calculation formula is: ; In the formula, F is the compressor running frequency under the current working condition, T is the coil temperature under the current working condition, F is the compressor frequency linear coefficient, T is the coil temperature linear coefficient, C is the compensation constant.

[0008] The speed control method of the outdoor fan of the air conditioner as described above, when the air conditioner working condition is medium-high temperature working condition, the compressor frequency linear coefficient in the air conditioner running calculation coefficient 0.2333, the coil temperature linear coefficient 0.65, the cross-coupling coefficient 0.0038.

[0009] As described above, in the method for controlling the speed of an outdoor fan in an air conditioner, when the air conditioner is operating at normal temperature, the compressor frequency linearity coefficient in the air conditioner operation calculation coefficients is... The coil temperature linearity coefficient is 0.2667. The cross-coupling coefficient is 0.6. It is 0.00322.

[0010] As described above, in the method for controlling the speed of an outdoor fan of an air conditioner, when the air conditioner is operating in a low-temperature condition, the compressor frequency linearity coefficient in the air conditioner operation calculation coefficient is... The coil temperature linearity coefficient is 0.1067. The cross-coupling coefficient is 0.24. It is 0.0005.

[0011] Furthermore, to achieve the above objectives, the present invention also proposes a speed control device for an outdoor air conditioner fan, the speed control device being used to implement the speed control method described above, the speed control device comprising: The data acquisition module is used to collect outdoor ambient temperature and air conditioning operating parameters in real time during cooling mode. The determination module is used to determine the air conditioning operating condition corresponding to the outdoor ambient temperature within a pre-established temperature range. The processing module is used to call the air conditioning operation calculation coefficient corresponding to the air conditioning operating condition, and calculate the final speed of the outdoor fan in combination with the air conditioning operating parameters.

[0012] Furthermore, to achieve the above objectives, the present invention also proposes a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, implements a speed control method for an outdoor fan of an air conditioner as described above.

[0013] Compared with the prior art, the speed control method and control device for an outdoor air conditioner fan proposed in this invention have the following advantages: 1. The air conditioner outdoor fan speed control method proposed in this invention determines the current operating condition of the air conditioning refrigeration system based on the outdoor ambient temperature, and calls the operating calculation coefficient adapted to the determined air conditioning operating condition to achieve continuous adjustment of the outdoor fan. This ensures that the outdoor fan speed can accurately match the heat dissipation air volume demand under the current operating condition, avoiding the fan from continuously operating in an unnecessary high speed range, which could cause additional noise, excessively low condensing temperature, and other reliability problems, or the fan speed being unable to meet the heat dissipation demand under the current operating condition, resulting in continuous high-power cooling of the air conditioning refrigeration system and energy waste. [Attached Image Description] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0014] Figure 1 This is a flowchart of the air conditioner outdoor fan speed control method of the present invention; Figure 2 for Figure 1 Flowchart of the specific method for step S30; Figure 3 This is a structural block diagram of the air conditioner outdoor fan speed control device of the present invention; Figure 4 This is a diagram showing the internal structure of the computer device of the present invention.

Detailed Implementation Methods

[0015] In existing air conditioning systems, outdoor fans generally adopt constant speed operation or discrete graded speed control. Because constant speed operation or discrete graded speed control relies on a lookup table of outdoor ambient temperature and compressor operating frequency, its output is only a few fixed speed points. This directly leads to the outdoor fan speed not matching the current heat dissipation demand when the outdoor temperature changes and the air conditioning operating conditions change. This can easily cause the fan to run continuously in an unnecessary high speed range, resulting in additional noise, excessively low condensing temperature, and other reliability problems.

[0016] To address the aforementioned technical problems, this invention proposes a solution: In cooling mode, the outdoor ambient temperature and air conditioning operating parameters are collected in real time; then, based on the outdoor ambient temperature, the air conditioning operating condition corresponding to the pre-established temperature range is determined; finally, based on the air conditioning operating condition, the air conditioning operation calculation coefficient corresponding to the air conditioning operating condition is called, and the final speed of the outdoor fan is calculated in combination with the air conditioning operating parameters.

[0017] The above solution determines the current operating condition of the air conditioning system based on the outdoor ambient temperature. Then, based on this condition, it calls upon an appropriate operating calculation coefficient to continuously adjust the outdoor fan. This ensures the fan speed precisely matches the cooling airflow requirements under the current conditions, preventing the fan from continuously operating at unnecessarily high speeds, which could cause additional noise, excessively low condensing temperatures, or other reliability issues. Conversely, it avoids situations where the fan speed cannot meet the cooling demands of the current conditions, leading to continuous high-power cooling and energy waste.

[0018] Based on the above, please refer to Figure 1 As shown in the embodiments of this specification, a method for controlling the speed of an outdoor air conditioner fan is proposed, including steps S10-S30, wherein: S10, in cooling mode, collects outdoor ambient temperature and air conditioning operating parameters in real time.

[0019] The air conditioning operating parameters include at least the compressor's operating frequency and the coil temperature.

[0020] In this embodiment, temperature data such as outdoor ambient temperature and coil temperature are collected by the temperature sensor built into the air conditioner, and the current operating frequency is collected by the frequency detection module built into the inverter compressor. This provides temperature data and operating parameters that can accurately reflect the current air conditioner operating conditions, providing a comprehensive and reliable data foundation for subsequent adjustment of the outdoor fan speed.

[0021] S20: Based on the outdoor ambient temperature, determine the air conditioning operating condition corresponding to the outdoor ambient temperature within a pre-established temperature range.

[0022] The pre-established temperature range is based on the thermodynamic characteristics of the air conditioning refrigeration system and the influence of outdoor ambient temperature on the load and heat exchange efficiency of the air conditioning refrigeration system. For example, the pre-established temperature range can be divided into four ranges, each corresponding to different air conditioning operating conditions.

[0023] In this embodiment, since the outdoor ambient temperature directly affects the refrigeration system load and heat exchange efficiency of the air conditioner, there will be different heat dissipation requirements under different outdoor ambient temperatures. The current operating condition of the air conditioner refrigeration system is determined based on the outdoor ambient temperature, and a strong correlation is established between the outdoor ambient temperature and the actual operating state of the air conditioner refrigeration system, so that the subsequent adjustment of the outdoor fan speed can accurately match the heat dissipation requirements under the current operating conditions.

[0024] S30: Based on the air conditioning operating condition, call the air conditioning operation calculation coefficient corresponding to that air conditioning operating condition, and calculate the final speed of the outdoor fan in combination with the air conditioning operating parameters.

[0025] The air conditioning operation calculation coefficient is a quantitative parameter that is pre-set for different air conditioning operating conditions and is used to quantitatively characterize the matching relationship between the heat dissipation air volume demand, the load characteristics of the refrigeration system and the energy consumption characteristics of the fan under the corresponding operating conditions. The air conditioning operation calculation coefficient includes at least the compressor frequency linearity coefficient, the coil temperature linearity coefficient and the cross-coupling coefficient.

[0026] Because existing air conditioning systems often use discrete, segmented speed control for outdoor fans—that is, adjusting the fan speed based on the relationship between outdoor ambient temperature and compressor operating frequency by looking up a table—this method, often resulting in fixed speed adjustments, cannot accurately match the cooling demands of the current air conditioning operating conditions. This leads to problems such as insufficient fan speed under high load conditions, resulting in inadequate cooling airflow and insufficient heat exchange, and excessively high fan speed under low load conditions, resulting in excessive cooling airflow and energy waste. This embodiment determines the air conditioning operating conditions based on the outdoor ambient temperature and uses an appropriate operating calculation coefficient to continuously adjust the outdoor fan speed. This ensures that the outdoor fan speed accurately matches the cooling airflow requirements of the current operating conditions, preventing the fan from continuously operating in an unnecessarily high speed range, causing additional noise, excessively low condensing temperatures, and other reliability issues, or the fan speed failing to meet the cooling demands of the current operating conditions, resulting in continuous high-power cooling of the air conditioning system and energy waste.

[0027] In a preferred embodiment, the pre-established temperature range includes a first temperature range, a second temperature range, a third temperature range, and a fourth temperature range, wherein the range of the first temperature range is [missing information]. The corresponding air conditioning operating condition is high-temperature operating condition; the range of the second temperature range is... The corresponding air conditioning operating condition is medium-high temperature operating condition; the range of the third temperature range is... The corresponding air conditioning operating condition is normal temperature operating condition; the range of the fourth temperature range is... The corresponding air conditioning operating condition is the low temperature operating condition.

[0028] When the air conditioning is in a high-temperature condition, the outdoor fan of the air conditioner operates at its highest speed.

[0029] In this embodiment, when the outdoor ambient temperature is greater than 43°C, that is, when the air conditioning is in high-temperature condition, the outdoor heat exchange environment is harsh and insufficient heat exchange is likely to occur. At this time, the air conditioning refrigeration system will forcibly execute the high-temperature protection mode (that is, the outdoor fan runs at the highest speed) to provide the maximum heat dissipation air volume, make up for the defect of reduced heat transfer efficiency under high temperature environment, and ensure the cooling effect of the air conditioning refrigeration system.

[0030] Optional, please refer to Figure 2 As shown, in step S30, based on the air conditioning operating condition, the corresponding air conditioning operation calculation coefficient is called, and the final speed of the outdoor fan is calculated in combination with the air conditioning operating parameters. This also includes steps S31-S32, where: S31, calculate the target speed percentage of the outdoor fan under the current air conditioning condition based on the air conditioning operation calculation coefficient and combined with the air conditioning operation parameters; S32 multiplies the target speed percentage of the outdoor fan by the maximum speed of the outdoor fan to obtain the final speed of the outdoor fan.

[0031] Among them, the target speed percentage of the outdoor fan The calculation formula is: .

[0032] In the formula, The value is the percentage of the minimum base speed, F is the compressor operating frequency under current conditions, and T is the coil temperature under current conditions. The compressor frequency linearity coefficient, This is the linear coefficient for coil temperature. is the cross-coupling coefficient, and C is the compensation constant.

[0033] Among them, the compressor frequency linearity coefficient It refers to a quantitative coefficient that characterizes the degree of linear correlation between the compressor operating frequency and the outdoor fan speed requirement. It is used to quantify and correct the impact weight of compressor operating frequency changes on heat dissipation air volume requirement. For example, when the compressor frequency increases (cooling load increases), the target speed percentage is positively adjusted through this coefficient to ensure that the heat dissipation air volume increases synchronously with the increase of load. Coil temperature linearity coefficient It refers to a quantitative coefficient that characterizes the degree of linear correlation between the temperature of the air conditioning coil and the required speed of the outdoor fan. It is used to correct the weight of the impact of coil temperature changes on the demand for heat dissipation air volume. For example, when the coil temperature rises (heat exchange efficiency decreases and system heat accumulation increases), the target speed percentage is adjusted upward by adjusting the coefficient to increase the air volume and accelerate heat dissipation. Cross-coupling coefficient It is a correction factor used to quantify the impact of the interaction between compressor operating frequency and coil temperature on outdoor fan speed; The compensation constant C is a fixed correction value set for the system's basic error, sensor acquisition deviation, and differences in the mechanical characteristics of the fan under different operating conditions. Generally speaking, the compensation constant C is 0 by default. Preferably, in this embodiment, the compensation constant C is set to 0.

[0034] In this embodiment, based on the air conditioning operating condition determined in step S20, the compressor frequency linearity coefficient set corresponding to that air conditioning operating condition is invoked. Coil temperature linearity coefficient and cross-coupling coefficient Through the compressor frequency linearity coefficient linearity coefficient of coil temperature This involves correcting the cooling airflow demand based on the compressor operating frequency and coil temperature under current operating conditions, enhancing the matching degree between cooling airflow and cooling load and heat exchange efficiency, and using cross-coupling coefficients. It compensates for the interaction between compressor operating frequency and coil temperature, and ensures the minimum operating requirements of the outdoor fan by using a basic minimum speed percentage. This ensures that the outdoor fan always operates at the minimum necessary speed to match the immediate heat load. Finally, by multiplying the target speed percentage by the maximum speed of the outdoor fan, the final speed of the outdoor fan can be calculated. This allows the outdoor fan speed to accurately match the heat dissipation air volume requirements under the current operating conditions, avoiding the fan from continuously operating in an unnecessary high speed range, which could cause additional noise, excessively low condensing temperature, and other reliability issues, or the fan speed not meeting the heat dissipation requirements under the current operating conditions, resulting in continuous high-power cooling of the air conditioning system and energy waste.

[0035] It should be noted that when the determined air conditioning operating condition is a high-temperature condition, the air conditioning refrigeration system will forcibly execute the high-temperature protection mode (i.e., the outdoor fan will run at the highest speed), so there is no need to adjust the speed of the outdoor fan.

[0036] As a preferred implementation, when the air conditioning is in a medium-high temperature condition, the compressor frequency linearity coefficient is 0.2333, the coil temperature linearity coefficient is 0.65, and the cross-coupling coefficient is 0.0038. When the air conditioning is in normal temperature condition, the compressor frequency linearity coefficient is 0.2667, the coil temperature linearity coefficient is 0.6, and the cross-coupling coefficient is 0.00322. When the air conditioning is in low temperature condition, the compressor frequency linearity coefficient is 0.1067, the coil temperature linearity coefficient is 0.24, and the cross-coupling coefficient is 0.0005.

[0037] It should be understood that the air conditioning operation calculation coefficients corresponding to different air conditioning operating conditions can be changed according to different models, so that the outdoor fan speed under different models can be precisely adjusted and better matched with the actual operating conditions.

[0038] Please refer to Figure 3 As shown in the embodiments of this specification, a speed control device 100 for an outdoor air conditioner fan is also proposed, comprising: The data acquisition module 110 is used to collect outdoor ambient temperature and air conditioning operating parameters in real time during cooling mode. The determination module 120 is used to determine the air conditioning operating condition corresponding to the outdoor ambient temperature within a pre-established temperature range based on the outdoor ambient temperature. The processing module 130 is used to call the air conditioning operation calculation coefficient corresponding to the air conditioning operating condition according to the air conditioning operating condition, and calculate the final speed of the outdoor fan in combination with the air conditioning operating parameters.

[0039] In this embodiment, the current operating condition of the air conditioning system is determined based on the outdoor ambient temperature. Based on the determined air conditioning operating condition, the operating calculation coefficient adapted to the air conditioning operating condition is called to realize continuous adjustment of the outdoor fan. This ensures that the outdoor fan speed can accurately match the heat dissipation air volume demand under the current operating condition, avoiding the fan from continuously operating in an unnecessary high speed range, which could cause additional noise, excessively low condensing temperature, and other reliability problems, or the fan speed being unable to meet the heat dissipation demand under the current operating condition, resulting in continuous high-power cooling of the air conditioning system and energy waste.

[0040] This specification also provides an embodiment of a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, when the processor executes the computer program, it implements a speed control method for an outdoor fan of an air conditioner as described above.

[0041] The internal structure diagram of the above computer equipment is as follows: Figure 4 As shown, the computer device includes a processor, memory, network interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The network interface is used to communicate with external terminals via a network connection. The processor executes an air conditioning energy-saving control program to implement a method for controlling the speed of an outdoor air conditioning fan. The display screen can be an LCD screen or an e-ink screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the computer device's casing, or an external keyboard, touchpad, or mouse.

[0042] It is worth noting that since the computer device of the present invention is used to implement the above-mentioned method for controlling the speed of an outdoor air conditioner fan, the embodiments of the computer device of the present invention include all the technical solutions of all embodiments of the above-mentioned method for controlling the speed of an outdoor air conditioner fan, and the technical effects achieved are exactly the same, so they will not be repeated here.

[0043] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0044] Those skilled in the art should also understand that the above description is one implementation method provided in conjunction with specific content, and does not imply that the specific implementation of the present invention is limited to these descriptions. Furthermore, due to differences in industry naming conventions, the invention is not limited to the above names or English names. Any methods or structures similar to or identical to those of the present invention, or any technical deductions or substitutions made based on the concept of the present invention, should be considered within the scope of protection of the present invention.

Claims

1. A method for controlling the speed of an outdoor fan of an air conditioner, characterized in that, include: In cooling mode, outdoor ambient temperature and air conditioning operating parameters are collected in real time; Based on the outdoor ambient temperature, determine the air conditioning operating conditions corresponding to the outdoor ambient temperature within a pre-established temperature range. Based on the air conditioning operating conditions, the corresponding air conditioning operation calculation coefficient is called, and the final speed of the outdoor fan is calculated in combination with the air conditioning operating parameters.

2. The method for controlling the speed of an outdoor air conditioner fan according to claim 1, characterized in that, The pre-established temperature range includes: First temperature range: The air conditioning operating condition corresponding to the first temperature range is the high temperature operating condition; Second temperature range: The second temperature range corresponds to the air conditioning operating condition of medium-high temperature; Third temperature range: The air conditioning operating condition corresponding to the third temperature range is the normal temperature operating condition; Fourth temperature range: The air conditioning operating condition corresponding to the fourth temperature range is the low temperature operating condition.

3. The method for controlling the speed of an outdoor air conditioner fan according to claim 2, characterized in that, When the air conditioning is operating under high temperature conditions, the outdoor fan of the air conditioner runs at its highest speed.

4. The method for controlling the speed of an outdoor air conditioner fan according to claim 2, characterized in that, The step of calling the air conditioning operation calculation coefficient corresponding to the air conditioning operating condition and calculating the final speed of the outdoor fan in combination with the air conditioning operating parameters includes: Based on the air conditioning operation calculation coefficients and combined with the air conditioning operation parameters, calculate the target speed percentage of the outdoor fan under the current air conditioning operating conditions; Multiply the target speed percentage of the outdoor fan by the maximum speed of the outdoor fan to obtain the final speed of the outdoor fan.

5. The method for controlling the speed of an outdoor air conditioner fan according to claim 4, characterized in that, The calculation involves using the air conditioner operation coefficients and combining them with the air conditioner operating parameters to calculate the target speed percentage of the outdoor fan under the current air conditioning operating conditions. The calculation formula is: ； In the formula, The value is the percentage of the minimum base speed, F is the compressor operating frequency under current conditions, and T is the coil temperature under current conditions. The compressor frequency linearity coefficient, This is the linear coefficient for coil temperature. is the cross-coupling coefficient, and C is the compensation constant.

6. The method for controlling the speed of an outdoor air conditioner fan according to claim 5, characterized in that, When the air conditioning operating condition is a medium-high temperature condition, the compressor frequency linearity coefficient in the air conditioning operation calculation coefficient is... The coil temperature linearity coefficient is 0.2333. The cross-coupling coefficient is 0.

65. It is 0.0038.

7. The method for controlling the speed of an outdoor air conditioner fan according to claim 5, characterized in that, When the air conditioning is operating at normal temperature, the compressor frequency linearity coefficient in the air conditioning operation calculation coefficients is... The coil temperature linearity coefficient is 0.2667. The cross-coupling coefficient is 0.

6. It is 0.00322.

8. The method for controlling the speed of an outdoor air conditioner fan according to claim 5, characterized in that, When the air conditioning operating condition is a low-temperature condition, the compressor frequency linearity coefficient in the air conditioning operation calculation coefficients The coil temperature linearity coefficient is 0.1067. The cross-coupling coefficient is 0.

24. It is 0.0005.

9. A speed control device for an outdoor fan of an air conditioner, the speed control device being used to implement the speed control method as described in any one of claims 1 to 8, characterized in that, The speed control device includes: The data acquisition module is used to collect outdoor ambient temperature and air conditioning operating parameters in real time during cooling mode. The determination module is used to determine the air conditioning operating condition corresponding to the outdoor ambient temperature within a pre-established temperature range. The processing module is used to call the air conditioning operation calculation coefficient corresponding to the air conditioning operating condition, and calculate the final speed of the outdoor fan in combination with the air conditioning operating parameters.

10. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements a speed control method for an outdoor air conditioner fan as described in any one of claims 1 to 8.

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