Outdoor fan control method, device, air conditioner and computer-readable storage medium

Abstract

This application provides an outdoor fan control method, device, air conditioner, and computer-readable storage medium. The outdoor fan control method is used to control the outdoor fan in the air conditioner, including: in response to the air conditioner being in cooling operation mode and entering a stable operation stage, determining the subcooling degree of the condenser based on the outdoor coil temperature, the outdoor ambient temperature, and the instantaneous current of the compressor; and correcting the fan speed of the outdoor fan based on the subcooling degree of the condenser.

Description

Technical Field

[0001] This application relates to the field of air conditioner technology, specifically to an outdoor fan control method, device, air conditioner, and computer-readable storage medium. Background Technology

[0002] In related technologies, air conditioners go through a start-up phase and a stable operation phase when they are turned on to cool. During the start-up phase, the outdoor fan uses an open-loop control method, which determines the basic operating fan speed based on the outdoor ambient temperature. However, once the air conditioner enters the stable operation phase, the outdoor fan switches to a closed-loop control method, which adjusts the fan speed based solely on the outdoor coil temperature. This closed-loop control method has lower control precision and can easily lead to a mismatch between the outdoor fan's operating speed and the air conditioner's cooling demand during the stable operation phase. This results in decreased cooling performance and poor indoor comfort. Summary of the Invention

[0003] This application provides an outdoor fan control method, device, air conditioner, and computer-readable storage medium, which can improve the control accuracy of the outdoor fan during the stable operation phase of the air conditioner, make the operating fan speed of the outdoor fan more compatible with the cooling demand of the air conditioner during the stable operation phase, and improve the cooling performance of the air conditioner and the comfort of the indoor environment.

[0004] In a first aspect, embodiments of this application provide an outdoor fan control method for controlling an outdoor fan in an air conditioner. The outdoor fan control method includes: in response to the air conditioner being in a cooling operation mode and entering a stable operation phase, determining the subcooling degree of the condenser based on the outdoor coil temperature, the outdoor ambient temperature, and the instantaneous current of the compressor; and correcting the fan speed of the outdoor fan based on the subcooling degree of the condenser.

[0005] In some embodiments, determining the subcooling of the condenser based on the outdoor coil temperature, the outdoor ambient temperature, and the compressor instantaneous current includes: determining the subcooling temperature of the condenser based on the outdoor coil temperature, the outdoor ambient temperature, and the condenser compensation temperature; determining the reference current of the compressor based on the outdoor ambient temperature and the compressor compensation current; determining the saturation temperature of the condenser based on the subcooling temperature of the condenser, the reference current of the compressor, and the instantaneous current of the compressor; and determining the subcooling of the condenser based on the subcooling temperature and the saturation temperature.

[0006] In some embodiments, before determining the subcooling temperature of the condenser based on the outdoor coil temperature, the outdoor ambient temperature, and the condensing compensation temperature, the outdoor fan control method includes: acquiring all external pipe temperature sampling values ​​within a first preset time period, wherein the first preset time period ends at the current time; and determining the average value of all external pipe temperature sampling values ​​within the first preset time period, using it as the outdoor coil temperature.

[0007] In some embodiments, determining the compressor's reference current based on the outdoor ambient temperature and the compressor compensation current includes: determining the outer ring temperature-current conversion coefficient and the compressor compensation current corresponding to the compressor based on the compressor's specifications; and determining the compressor's reference current based on the outdoor ambient temperature, the outer ring temperature-current conversion coefficient, and the compressor compensation current.

[0008] In some embodiments, correcting the fan speed of the outdoor fan based on the subcooling of the condenser includes: determining the subcooling range in which the subcooling of the condenser is located; determining a fan speed correction strategy for the outdoor fan based on the subcooling range; and correcting the fan speed of the outdoor fan based on the fan speed correction strategy.

[0009] In some embodiments, the subcooling range includes a first subcooling range, a second subcooling range, a third subcooling range, and a fourth subcooling range that are sequentially and continuously distributed along the direction of temperature decrease; determining the fan speed adjustment strategy for the outdoor fan based on the subcooling range includes: in response to determining that the subcooling of the condenser is in the first subcooling range, determining that the fan speed adjustment strategy for the outdoor fan is to control the outdoor fan to operate at the highest fan speed; in response to determining that the subcooling of the condenser is in the second subcooling range, determining the fan speed adjustment strategy for the outdoor fan. To control the outdoor fan's fan speed to increase by one level every first preset time interval, and to ensure that the outdoor fan's fan speed is not higher than the second highest fan speed; in response to determining that the condenser's subcooling degree is in the third subcooling degree range, the outdoor fan's fan speed correction strategy is determined to control the outdoor fan to maintain the current fan speed; in response to determining that the condenser's subcooling degree is in the fourth subcooling degree range, the outdoor fan's fan speed correction strategy is determined to control the outdoor fan's fan speed to decrease by one level every second preset time interval, and to ensure that the outdoor fan's fan speed is not lower than the lowest fan speed.

[0010] In some embodiments, the outdoor fan control method includes: in response to the air conditioner being in cooling operation mode and entering a stable operation phase, determining whether the outdoor ambient temperature is greater than or equal to a high-load outer ring temperature threshold; and in response to determining whether the outdoor ambient temperature is greater than or equal to the high-load outer ring temperature threshold, controlling the outdoor fan to operate at the highest fan speed.

[0011] Secondly, embodiments of this application provide an outdoor fan control device, including a correction circuit, which is configured to perform the following operations: in response to the air conditioner being in a cooling operation mode and entering a stable operation phase, determining the subcooling degree of the condenser based on the outdoor coil temperature, the outdoor ambient temperature, and the instantaneous current of the compressor; and correcting the fan speed of the outdoor fan based on the subcooling degree of the condenser.

[0012] Thirdly, embodiments of this application provide an air conditioner, including: an outdoor fan; a memory storing a computer program; and a processor, wherein the computer program, when executed by the processor, implements the outdoor fan control method as described in any of the above embodiments.

[0013] Fourthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, the computer program being loaded by a processor to execute the steps in the outdoor fan control method described above.

[0014] The outdoor fan control method provided in this application first determines the subcooling of the condenser based on the outdoor coil temperature, the outdoor ambient temperature, and the instantaneous current of the compressor. The subcooling determined in this way can accurately reflect the heat exchange performance of the air conditioner and the degree of matching between the outdoor fan's operating fan speed and the air conditioner's cooling demand during stable operation. When the air conditioner's heat exchange performance is low and the outdoor fan's operating fan speed does not match the air conditioner's cooling demand during stable operation, a corresponding correction strategy can be determined based on the degree of deviation between the outdoor fan's operating fan speed and the air conditioner's cooling demand during stable operation, as reflected by the subcooling. Then, based on the determined correction strategy, the outdoor fan speed is corrected so that the outdoor fan's operating fan speed matches the air conditioner's cooling demand during stable operation, improving the control accuracy of the outdoor fan during stable operation and the heat exchange efficiency of the condenser during stable operation, thereby improving the air conditioner's cooling performance and the comfort of the indoor environment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a flowchart of an outdoor fan control method provided in some embodiments of this application;

[0017] Figure 2 This is a partial flowchart of an outdoor fan control method provided in some embodiments of this application;

[0018] Figure 3 This is another partial flowchart of an outdoor fan control method provided in some embodiments of this application;

[0019] Figure 4 This is another partial flowchart of an outdoor fan control method provided in some embodiments of this application;

[0020] Figure 5 This is another partial flowchart of an outdoor fan control method provided in some embodiments of this application;

[0021] Figure 6 This is another partial flowchart of an outdoor fan control method provided in some embodiments of this application;

[0022] Figure 7 This is another partial flowchart of an outdoor fan control method provided in some embodiments of this application;

[0023] Figure 8 This is a structural diagram of an air conditioner provided in some embodiments of this application.

[0024] Explanation of key component symbols:

[0025] 1-Air conditioner, 10-Processor, 20-Memory. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0029] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0030] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0031] In related technologies, after the air conditioner enters the stable operation phase, the operating speed of the outdoor fan is controlled and adjusted only based on the outdoor coil temperature. However, during the stable operation of the air conditioner, the outdoor coil temperature may still be within the control range where the fan speed remains unchanged, causing the outdoor fan to maintain the basic operating speed during the startup phase, which cannot match the cooling demand of the air conditioner during the stable operation phase.

[0032] Firstly, embodiments of this application provide an outdoor fan control method for controlling the outdoor fan in an air conditioner 1. For example... Figure 1 As shown, the outdoor fan control method includes S10 to S20, which can improve the control accuracy of the outdoor fan during the stable operation phase of the air conditioner 1, make the operating fan speed of the outdoor fan and the cooling demand of the air conditioner 1 during the stable operation phase more compatible, and improve the cooling performance of the air conditioner 1 and the comfort of the indoor environment.

[0033] S10: In response to the air conditioner 1 being in cooling operation mode and entering a stable operation phase, the subcooling degree of the condenser is determined based on the outdoor coil temperature, the outdoor ambient temperature, and the compressor instantaneous current. Here, the condenser and the outdoor fan are respectively located on the outdoor side, and the outdoor fan is used to drive outdoor air to exchange heat with the condenser. Here, the outdoor coil temperature can be obtained by measuring a temperature sensor installed on the outdoor coil, and the outdoor ambient temperature can be obtained by measuring a temperature sensor installed on the outdoor side or by obtaining it via the Internet.

[0034] S20: Adjust the fan speed of the outdoor fan according to the subcooling of the condenser.

[0035] Here, the heat exchange performance of air conditioner 1 and the degree of matching between the outdoor fan's operating fan speed and the cooling demand of air conditioner 1 during stable operation can be determined based on the subcooling of the condenser. When the heat exchange efficiency of air conditioner 1 is low and the outdoor fan's operating fan speed does not match the cooling demand of air conditioner 1 during stable operation, a corresponding correction strategy can be determined based on the degree of deviation between the outdoor fan's operating fan speed and the cooling demand of air conditioner 1 during stable operation, as reflected by the subcooling. Then, the outdoor fan speed is corrected based on the determined correction strategy to make the outdoor fan's operating fan speed more matched with the cooling demand of air conditioner 1 during stable operation, thereby improving the control accuracy of the outdoor fan during the stable operation of air conditioner 1 and the heat exchange efficiency of the condenser during stable operation, thus improving the cooling performance of air conditioner 1 and the comfort of the indoor environment.

[0036] like Figure 2 As shown, in some embodiments, S10 may include S11 to S14 to determine the subcooling of the condenser based on the outdoor coil temperature, the outdoor ambient temperature, and the compressor instantaneous current.

[0037] S11: Determine the subcooling temperature of the condenser based on the outdoor coil temperature, outdoor ambient temperature, and condensing compensation temperature.

[0038] Here, multiple condensing compensation temperatures can be preset in the control system of air conditioner 1, each corresponding to a different outdoor ambient temperature. Based on the outdoor ambient temperature, the condensing compensation temperature corresponding to the current outdoor environment can be determined. By summing the outdoor coil temperature and the condensing compensation temperature, the subcooling temperature of the condenser can be obtained.

[0039] S12: Determine the compressor's reference current based on the outdoor ambient temperature and the compressor compensation current.

[0040] Here, a compressor reference current calculation model can be pre-set in the control system of air conditioner 1. The compressor reference current calculation model takes the outdoor ambient temperature and compressor compensation current as input variables and the compressor reference current as the output result. In this way, the outdoor ambient temperature and compressor compensation current can be input into the compressor reference current calculation model, and the compressor reference current can be obtained through the calculation model.

[0041] S13: Determine the saturation temperature of the condenser based on the subcooling temperature of the condenser, the reference current of the compressor, and the instantaneous current of the compressor.

[0042] Here, a saturation temperature calculation model can be pre-set in the control system of air conditioner 1. The saturation temperature calculation model takes the subcooling temperature of the condenser, the reference current of the compressor, and the instantaneous current of the compressor as input variables, and the saturation temperature of the condenser as the output result. In this way, the subcooling temperature of the condenser, the reference current of the compressor, and the instantaneous current of the compressor can be input into the saturation temperature calculation model, and the saturation temperature of the condenser can be obtained through the calculation model.

[0043] S14: Determine the degree of subcooling of the condenser based on its subcooling temperature and saturation temperature. Here, the degree of subcooling of the condenser is obtained by subtracting its subcooling temperature from its saturation temperature.

[0044] By setting S11 to S14, the subcooling of the condenser can be determined more accurately, thereby improving the precision and accuracy of controlling the fan speed based on the subcooling of the condenser.

[0045] The outdoor coil temperature mentioned above can be a current instantaneous value or an average value; this application embodiment does not limit this. In some examples, the outdoor coil temperature mentioned above can be an average value; such as... Figure 3 As shown, before S11, the outdoor fan control method may include S101 to S102.

[0046] S101: Obtain all external pipe temperature sampling values ​​within a first preset time period, with the current time as the end point of the first preset time period.

[0047] Here, the specific value of the first preset duration can be determined according to actual needs, and this application embodiment does not limit it. For example, the first preset duration can be a positive integer multiple of the external pipe temperature sampling period, and the ratio of the first preset duration to the external pipe temperature sampling period is greater than or equal to 2. For example, the first preset duration can be 3 times the external pipe temperature sampling period; when the external pipe temperature sampling period is 30s, the first preset duration can be 90s.

[0048] S102: Determine the average value of all external pipe temperature sampling values ​​within the first preset time period, and use it as the outdoor coil temperature.

[0049] By setting S101 to S102, the average value of all external pipe temperature samples within the first preset time period can be used as the outdoor coil temperature, reducing the fluctuation of the outdoor coil temperature and increasing the accuracy of the results when performing calculations based on the outdoor coil temperature.

[0050] like Figure 4 As shown, in some examples, S12 may include S121 to S122.

[0051] S121: Based on the compressor's specifications, determine the corresponding external ring temperature-current conversion coefficient and compressor compensation current.

[0052] Here, experiments can be conducted in advance with compressors of different specifications to obtain sufficient experimental data, including outdoor ambient temperature data and compressor reference current data. Then, fitting calculations are performed on the experimental data to determine the external loop temperature-current conversion coefficient and compressor compensation current corresponding to different compressor specifications. A database of compressors, external loop temperature-current conversion coefficients, and compressor compensation currents is then established and pre-set in the control system of air conditioner 1. In this way, based on the compressor's specifications and the aforementioned database, the external loop temperature-current conversion coefficient and compressor compensation current corresponding to that compressor can be determined.

[0053] S122: Determine the compressor's reference current based on the outdoor ambient temperature, the outer ring temperature-current conversion factor, and the compressor compensation current. For example, the outdoor ambient temperature and the outer ring temperature-current conversion factor can be calculated first, and then the sum of this product and the compressor compensation current can be calculated, with this sum serving as the compressor's reference current.

[0054] By setting S121 to S122, the reference current of the compressor can be determined more accurately based on the outdoor ambient temperature and the compressor compensation current, thereby improving the accuracy of subsequent calculations and overall control accuracy.

[0055] like Figure 5 As shown, in some embodiments, S20 may include S21 to S23.

[0056] S21: Determine the subcooling range of the condenser.

[0057] Here, several continuously distributed subcooling intervals can be pre-set in the control system of air conditioner 1, and a corresponding outdoor fan damper correction strategy can be set for each subcooling interval. The number of subcooling intervals and the length of each subcooling interval can be determined according to actual needs, and this embodiment does not limit this. Generally speaking, if there are more subcooling intervals, there will be more damper correction strategies set, the matching degree between each damper correction strategy and the subcooling interval will be higher, and the classification accuracy of the damper correction strategy will be higher. Similarly, if the length of each subcooling interval is shorter, the temperature range corresponding to each damper correction strategy will be smaller, the matching degree between each damper correction strategy and the subcooling interval will be higher, and the classification accuracy of the damper correction strategy will be higher.

[0058] In some examples, at least four subcooling ranges can be set. These at least four subcooling ranges include a first subcooling range, a second subcooling range, a third subcooling range, and a fourth subcooling range, sequentially and continuously distributed along the direction of temperature decrease. A corresponding outdoor fan damper correction strategy is set for each subcooling range. Specifically, the first subcooling range is the subcooling range with a subcooling value less than or equal to a first threshold subcooling value; the second subcooling range is the subcooling range with a subcooling value greater than the first threshold subcooling value but less than or equal to the second threshold subcooling value; the third subcooling range is the subcooling range with a subcooling value greater than or equal to the second threshold subcooling value but less than or equal to the third threshold subcooling value; and the fourth subcooling range is the subcooling range with a subcooling value greater than the third threshold subcooling value.

[0059] S22: Determine the windshield correction strategy for the outdoor fan based on the subcooling range.

[0060] like Figure 6 As shown, in some examples, when at least four subcooling intervals are set as described above, S22 may include S221 to S224.

[0061] S221: In response to determining that the subcooling of the condenser is in the first subcooling range, the outdoor fan speed adjustment strategy is determined to be to control the outdoor fan to operate at the highest speed. When the subcooling of the condenser is determined to be in the first subcooling range, it indicates that the heat exchange efficiency of the condenser is low, and it is necessary to control the outdoor fan to operate at the highest speed to quickly improve the heat exchange efficiency of the condenser.

[0062] S222: In response to determining that the subcooling of the condenser is in the second subcooling range, the outdoor fan's fan speed adjustment strategy is determined to control the outdoor fan speed to increase by one level every first preset time interval, and the outdoor fan speed is not higher than the second highest speed.

[0063] When the subcooling of the condenser is determined to be within the second subcooling range, it indicates that the heat exchange efficiency of the condenser is low. It is necessary to gradually increase the outdoor fan speed to the second-highest setting to improve the heat exchange efficiency of the condenser accordingly. The specific value of the first preset time interval can be determined according to actual needs, and this application embodiment does not limit it; for example, the first preset time interval can be 2 minutes to 4 minutes.

[0064] S223: In response to determining that the subcooling of the condenser is in the third subcooling range, the outdoor fan's fan speed adjustment strategy is determined to be to control the outdoor fan to maintain the current fan speed. When the subcooling of the condenser is determined to be in the third subcooling range, it indicates that the heat exchange efficiency of the condenser and the cooling demand of air conditioner 1 are well matched, and there is no need to intervene in the outdoor fan's fan speed.

[0065] S224: In response to determining that the subcooling degree of the condenser is in the fourth subcooling degree range, the outdoor fan speed adjustment strategy is determined to be to control the outdoor fan speed to decrease by one level every second preset time interval, and the outdoor fan speed shall not be lower than the lowest speed. When it is determined that the subcooling degree of the condenser is in the fourth subcooling degree range, it indicates that the heat exchange efficiency of the condenser is too high and excessively subcooled, and it is necessary to control the outdoor fan to gradually reduce to the lowest speed to reduce the operating power consumption of the air conditioner 1 and the risk of liquid slugging damage to the compressor. The specific value of the second preset time interval can be determined according to actual needs, and this application embodiment does not limit it; for example, the second preset time interval can be 2 minutes to 4 minutes.

[0066] S23: Adjust the windshield of the outdoor fan according to the windshield adjustment strategy of the outdoor fan.

[0067] like Figure 7 As shown, in some embodiments, the outdoor fan control method may include S30 to S40.

[0068] S30: In response to the air conditioner 1 being in cooling operation mode and entering a stable operation phase, determine whether the outdoor ambient temperature is greater than or equal to the high-load outer loop temperature threshold. Here, the high-load outer loop temperature threshold can be preset in the control system of the air conditioner 1.

[0069] S40: In response to determining whether the outdoor ambient temperature is greater than or equal to the high-load outer ring temperature threshold, the outdoor fan is controlled to operate at the highest fan speed. When the outdoor ambient temperature is greater than or equal to the high-load outer ring temperature threshold, it indicates that the environmental load is high, and the outdoor fan needs to be controlled to operate at the highest fan speed to quickly match and meet the higher environmental load, thereby ensuring that the heat exchange efficiency of the condenser can be matched with the cooling demand.

[0070] Secondly, embodiments of this application provide an outdoor fan control device, which includes a correction circuit configured to perform the following operations: in response to the air conditioner 1 being in cooling operation mode and entering a stable operation phase, determining the subcooling degree of the condenser based on the outdoor coil temperature, the outdoor ambient temperature, and the instantaneous current of the compressor; and correcting the fan speed of the outdoor fan based on the subcooling degree of the condenser.

[0071] like Figure 8 As shown, in a third aspect, this application provides an air conditioner 1, which includes an outdoor fan, a processor 10, and a memory 20. The memory 20 stores a computer program, which, when executed by the processor 10, implements the outdoor fan control method provided in any of the above embodiments.

[0072] Processor 10 is connected to memory 20 and can perform various actions and processes according to the program stored in memory 20. Specifically, processor 10 can be an integrated circuit chip with signal processing capabilities. The processor 10 can be a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), off-the-shelf programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, and can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor, and can be based on x86 architecture or ARM architecture.

[0073] Memory 20 may be volatile or non-volatile, or may include both. Non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory may be random access memory (RAM) used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct memory bus random access memory (DRRAM). It should be noted that memory 20 of the methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0074] Fourthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, the computer program being loaded by a processor 10 to execute the steps in the control method of any of the above embodiments.

[0075] For example, the aforementioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical discs (e.g., CDs (Compact Disks), DVDs (Digital Versatile Disks), etc.), smart cards, and flash memory devices (e.g., EPROMs (Erasable Programmable Read-Only Memory), cards, sticks, or key drives, etc.). The various computer-readable storage media described in the embodiments of this application may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0076] The above provides a detailed description of an outdoor fan control method, device, air conditioner, and computer-readable storage medium provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for controlling an outdoor fan, characterized in that, The method for controlling the outdoor fan in an air conditioner includes: In response to the air conditioner being in cooling operation mode and entering a stable operation phase, the subcooling degree of the condenser is determined based on the outdoor coil temperature, the outdoor ambient temperature, and the instantaneous current of the compressor. The fan speed of the outdoor fan is adjusted according to the subcooling of the condenser; The subcooling of the condenser is determined based on the outdoor coil temperature, the outdoor ambient temperature, and the compressor instantaneous current, including: The subcooling temperature of the condenser is determined based on the outdoor coil temperature, the outdoor ambient temperature, and the condensing compensation temperature. The reference current of the compressor is determined based on the outdoor ambient temperature and the compressor compensation current. The saturation temperature of the condenser is determined based on the subcooling temperature of the condenser, the reference current of the compressor, and the instantaneous current of the compressor. The degree of subcooling of the condenser is determined based on the subcooling temperature and saturation temperature of the condenser.

2. The outdoor fan control method according to claim 1, characterized in that, Before determining the subcooling temperature of the condenser based on the outdoor coil temperature, outdoor ambient temperature, and condensing compensation temperature, the outdoor fan control method includes: Obtain all external pipe temperature sampling values ​​within a first preset time period, with the current moment as the end point of the first preset time period; The average value of all external pipe temperature samples within a first preset time period is determined and used as the outdoor coil temperature.

3. The outdoor fan control method according to claim 1, characterized in that, The reference current of the compressor is determined based on the outdoor ambient temperature and the compressor compensation current, including: Based on the specifications of the compressor, determine the outer ring temperature-current conversion coefficient and the compressor compensation current corresponding to the compressor; The reference current of the compressor is determined based on the outdoor ambient temperature, the outer ring temperature-current conversion coefficient, and the compressor compensation current.

4. The outdoor fan control method according to claim 1, characterized in that, The fan speed of the outdoor fan is adjusted according to the subcooling of the condenser, including: Determine the subcooling range of the condenser; The windshield correction strategy for the outdoor fan is determined based on the supercooling range. The windshield of the outdoor fan is corrected according to the windshield correction strategy of the outdoor fan.

5. The outdoor fan control method according to claim 4, characterized in that, The supercooling range includes a first supercooling range, a second supercooling range, a third supercooling range, and a fourth supercooling range that are continuously distributed along the direction of temperature decrease. The outdoor fan's damper correction strategy is determined based on the supercooling range, including: In response to determining that the subcooling of the condenser is in the first subcooling range, the wind speed correction strategy for the outdoor fan is determined to be to control the outdoor fan to operate at the highest wind speed. In response to determining that the subcooling of the condenser is in the second subcooling range, the wind speed correction strategy of the outdoor fan is determined to be to control the wind speed of the outdoor fan to increase by one level every first preset time interval, and the wind speed of the outdoor fan is not higher than the second highest wind speed. In response to determining that the subcooling of the condenser is in the third subcooling range, the wind speed correction strategy for the outdoor fan is determined to be to control the outdoor fan to maintain the current wind speed operation. In response to determining that the subcooling of the condenser is in the fourth subcooling range, the wind speed correction strategy of the outdoor fan is determined to be to control the wind speed of the outdoor fan to decrease by one level every second preset time interval, and the wind speed of the outdoor fan is not lower than the lowest wind speed.

6. The outdoor fan control method according to claim 1, characterized in that, include: In response to the air conditioner being in cooling operation mode and entering a stable operation phase, determine whether the outdoor ambient temperature is greater than or equal to the high load outer ring temperature threshold. In response to determining whether the outdoor ambient temperature is greater than or equal to the high-load outer ring temperature threshold, the outdoor fan is controlled to operate at the highest wind speed.

7. An outdoor fan control device, characterized in that, Includes a correction circuit, which is configured to perform the following operations: In response to the air conditioner being in cooling operation mode and entering a stable operation phase, the subcooling degree of the condenser is determined based on the outdoor coil temperature, outdoor ambient temperature, and compressor instantaneous current. The fan speed of the outdoor fan is adjusted according to the subcooling of the condenser; The subcooling of the condenser is determined based on the outdoor coil temperature, the outdoor ambient temperature, and the compressor instantaneous current, including: The subcooling temperature of the condenser is determined based on the outdoor coil temperature, the outdoor ambient temperature, and the condensing compensation temperature. The reference current of the compressor is determined based on the outdoor ambient temperature and the compressor compensation current. The saturation temperature of the condenser is determined based on the subcooling temperature of the condenser, the reference current of the compressor, and the instantaneous current of the compressor. The degree of subcooling of the condenser is determined based on the subcooling temperature and saturation temperature of the condenser.

8. An air conditioner, characterized in that, include: Outdoor fan; Memory, which stores computer programs; A processor, wherein the computer program, when executed by the processor, implements the outdoor fan control method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, It stores a computer program, which is loaded by a processor to execute the steps of the outdoor fan control method according to any one of claims 1 to 6.

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