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

Abstract

The embodiment of the invention provides an outdoor fan control method and device, an air conditioner and a computer readable storage medium, and the outdoor fan control method is used for controlling an outdoor fan in the air conditioner and comprises the following steps: responding to the condition that the air conditioner is in a refrigeration operation mode and enters a stable operation stage; the supercooling degree of the condenser is determined according to the outdoor coil pipe temperature, the outdoor environment temperature and the instantaneous current of the compressor; and the wind gear of the outdoor fan is corrected according to the supercooling degree of the condenser.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and in particular to an outdoor fan control method, device, air conditioner and computer-readable storage medium. Background Art

[0002] In the related art, when the air conditioner is turned on for cooling, it will go through the startup phase and the stable operation phase in sequence. When the air conditioner is in the startup phase, the outdoor fan adopts an open-loop control method, that is, the basic operating wind speed of the outdoor fan is determined according to the outdoor ambient temperature; after the air conditioner enters the stable operation phase, the outdoor fan will switch to a closed-loop control method, that is, the operating wind speed of the outdoor fan is controlled and adjusted only according to the outdoor coil temperature. This type of closed-loop control method has low control accuracy and is prone to mismatch between the operating wind speed of the outdoor fan and the cooling demand of the air conditioner in the stable operation phase, which in turn leads to a decrease in the cooling performance of the air conditioner and poor comfort of the indoor environment. Summary of the invention

[0003] The embodiments of the present application provide 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 stage of the air conditioner, make the operating wind speed of the outdoor fan and the cooling demand of the air conditioner during the stable operation stage more matched, and improve the cooling performance of the air conditioner and the comfort of the indoor environment.

[0004] In a first aspect, an embodiment of the present application provides an outdoor fan control method for controlling an outdoor fan in an air conditioner, the outdoor fan control method comprising: in response to the air conditioner being in a cooling operation mode and entering a stable operation stage, determining the subcooling of the condenser according to the outdoor coil temperature, the outdoor ambient temperature and the instantaneous current of the compressor; and correcting the wind speed of the outdoor fan according to the subcooling of the condenser.

[0005] In some embodiments, 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, including: determining the subcooling temperature of the condenser based on the outdoor coil temperature, the outdoor ambient temperature and the condensation 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; determining the subcooling degree of the condenser based on the subcooling temperature and the saturation temperature of the condenser.

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

[0007] In some embodiments, a reference current of the compressor is determined according to the outdoor ambient temperature and the compressor compensation current, including: determining the outer ring temperature-current conversion coefficient and the compressor compensation current corresponding to the compressor according to the specification parameters of the compressor; determining the reference current of the compressor according to the outdoor ambient temperature, the outer ring temperature-current conversion coefficient and the compressor compensation current.

[0008] In some embodiments, the wind speed of the outdoor fan is corrected according to the subcooling degree of the condenser, including: determining the subcooling degree interval in which the subcooling degree of the condenser is located; determining the wind speed correction strategy of the outdoor fan according to the subcooling degree interval; and correcting the wind speed of the outdoor fan according to the wind speed correction strategy of the outdoor fan.

[0009] In some embodiments, the subcooling interval includes a first subcooling interval, a second subcooling interval, a third subcooling interval and a fourth subcooling interval which are successively distributed in the direction of temperature drop; determining the wind speed correction strategy of the outdoor fan according to the subcooling interval includes: in response to determining that the subcooling degree of the condenser is in the first subcooling interval, determining the wind speed correction strategy of the outdoor fan is to control the outdoor fan to operate at the highest wind speed; in response to determining that the subcooling degree of the condenser is in the second subcooling interval, determining the wind speed correction strategy of the outdoor fan To control the wind speed of the outdoor fan to increase by one level at 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 supercooling degree of the condenser is in the third supercooling degree interval, the wind speed correction strategy of the outdoor fan is determined to control the outdoor fan to maintain the current wind speed operation; in response to determining that the supercooling degree of the condenser is in the fourth supercooling degree interval, the wind speed correction strategy of the outdoor fan is determined to control the wind speed of the outdoor fan to decrease by one level at every second preset time interval, and the wind speed of the outdoor fan is not lower than the lowest wind speed.

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

[0011] In a second aspect, an embodiment of the present application provides an outdoor fan control device, comprising 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 stage, determining the subcooling of the condenser according to the outdoor coil temperature, the outdoor ambient temperature and the instantaneous current of the compressor; and correcting the wind speed of the outdoor fan according to the subcooling of the condenser.

[0012] In a third aspect, an embodiment of the present application provides an air conditioner, comprising: 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] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is loaded by a processor to execute the steps in the outdoor fan control method described above.

[0014] The outdoor fan control method provided in the embodiment of the present application first determines the subcooling of the condenser according to the outdoor coil temperature, the outdoor ambient temperature and the instantaneous current of the compressor. The subcooling thus determined can more accurately reflect the heat exchange performance of the air conditioner and the matching degree between the operating wind speed of the outdoor fan and the cooling demand of the air conditioner in the stable operation stage. When the heat exchange performance of the air conditioner is low and the operating wind speed of the outdoor fan does not match the cooling demand of the air conditioner in the stable operation stage, a corresponding correction strategy can be determined according to the degree of deviation between the operating wind speed of the outdoor fan reflected by the subcooling and the cooling demand of the air conditioner in the stable operation stage, and then the wind speed of the outdoor fan is corrected based on the determined correction strategy, so that the operating wind speed of the outdoor fan is more matched with the cooling demand of the air conditioner in the stable operation stage, thereby improving the control accuracy of the outdoor fan in the stable operation stage of the air conditioner and the heat exchange efficiency of the condenser in the stable operation stage, thereby improving the cooling performance of the air conditioner and the comfort of the indoor environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 is a flow chart of an outdoor fan control method provided by some embodiments of the present application;

[0017] Figure 2 is a partial flow chart of an outdoor fan control method provided in some embodiments of the present application;

[0018] Figure 3 is another partial flow chart of the outdoor fan control method provided by some embodiments of the present application;

[0019] Figure 4 is another partial flow chart of the outdoor fan control method provided in some embodiments of the present application;

[0020] Figure 5 is another partial flow chart of the outdoor fan control method provided in some embodiments of the present application;

[0021] Figure 6 is another partial flow chart of the outdoor fan control method provided in some embodiments of the present application;

[0022] Figure 7 is another partial flow chart of the outdoor fan control method provided in some embodiments of the present application;

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

[0024] Description of main component symbols:

[0025] 1- air conditioner, 10- processor, 20- memory. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[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 "suitable for" or "configured to" in this application is meant to be open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps. In addition, the use of "based on" is meant to be open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values ​​can be based on additional conditions or values ​​beyond the stated values ​​in practice.

[0030] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0031] In the related art, after the air conditioner enters the stable operation stage, the operating wind speed of the outdoor fan is controlled and adjusted only according to the outdoor coil temperature. However, when the air conditioner is running steadily, the outdoor coil temperature may still be within the control range where the wind speed remains unchanged, so that the outdoor fan still maintains the basic operating wind speed in the startup stage, which cannot match the cooling demand of the air conditioner in the stable operation stage.

[0032] In a first aspect, an embodiment of the present application provides an outdoor fan control method for controlling an outdoor fan in an air conditioner 1. Figure 1 As shown, the outdoor fan control method includes S10~S20, which can improve the control accuracy of the outdoor fan during the stable operation stage of the air conditioner 1, make the operating wind speed of the outdoor fan and the cooling demand of the air conditioner 1 during the stable operation stage more matched, 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 the cooling operation mode and entering the stable operation stage, the subcooling degree of the condenser is determined according to the outdoor coil temperature, the outdoor ambient temperature and the instantaneous current of the compressor. Here, the condenser and the outdoor fan are correspondingly arranged on the outdoor side, and the outdoor fan is used to drive the outdoor air and the condenser for heat exchange. Here, the outdoor coil temperature can be measured by a temperature sensing package arranged on the outdoor coil, and the outdoor ambient temperature can be measured by a temperature sensor arranged on the outdoor side, or obtained through the Internet.

[0034] S20: Correct the windshield of the outdoor fan according to the subcooling degree of the condenser.

[0035] Here, the heat exchange performance of the air conditioner 1 and the matching degree between the operating wind speed of the outdoor fan and the cooling demand of the air conditioner 1 in the stable operation stage can be determined according to the supercooling degree of the condenser. When the heat exchange efficiency of the air conditioner 1 is low and the operating wind speed of the outdoor fan does not match the cooling demand of the air conditioner 1 in the stable operation stage, the corresponding correction strategy can be determined according to the deviation degree between the operating wind speed of the outdoor fan reflected by the supercooling degree and the cooling demand of the air conditioner 1 in the stable operation stage, and then the wind speed of the outdoor fan is corrected based on the determined correction strategy, so that the operating wind speed of the outdoor fan is more matched with the cooling demand of the air conditioner 1 in the stable operation stage, and the control accuracy of the outdoor fan in the stable operation stage of the air conditioner 1 and the heat exchange efficiency of the condenser in the stable operation stage are improved, thereby improving the cooling performance of the 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 degree of the condenser according to the outdoor coil temperature, the outdoor ambient temperature and the instantaneous current of the compressor.

[0037] S11: Determine the subcooling temperature of the condenser according to the outdoor coil temperature, the outdoor ambient temperature and the condensation compensation temperature.

[0038] Here, multiple condensation compensation temperatures can be pre-set in the control system of the air conditioner 1, and each condensation compensation temperature is set corresponding to a different outdoor ambient temperature; according to the outdoor ambient temperature, the condensation compensation temperature corresponding to the current outdoor environment can be determined. The subcooling temperature of the condenser can be obtained by summing the outdoor coil temperature and the condensation compensation temperature.

[0039] S12: Determine the reference current of the compressor according to 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 the air conditioner 1. The compressor reference current calculation model uses the outdoor ambient temperature and the compressor compensation current as input variables and uses the compressor reference current as the output result. In this way, the outdoor ambient temperature and the compressor compensation current can be input into the compressor reference current calculation model, and the compressor reference current can be calculated by the compressor reference current calculation model.

[0041] S13: Determine the saturation temperature of the condenser according to 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 the air conditioner 1. The saturation temperature calculation model uses the subcooling temperature of the condenser, the reference current of the compressor, and the instantaneous current of the compressor as input variables, and uses the saturation temperature of the condenser as an 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 calculated by the saturation temperature calculation model.

[0043] S14: Determine the degree of subcooling of the condenser according to the subcooling temperature and the saturation temperature of the condenser. Here, the degree of subcooling of the condenser can be obtained by subtracting the subcooling temperature and the saturation temperature of the condenser.

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

[0045] The outdoor coil temperature may be a current instantaneous value or an average value, which is not limited in the present embodiment. In some examples, the outdoor coil temperature may be an average value; Figure 3 As shown, here, before S11, the outdoor fan control method may include S101-S102.

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

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

[0048] S102: Determine an average value of all external pipe temperature sampling values ​​within a 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 sampling values ​​within the first preset time period can be used as the outdoor coil temperature, thereby 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-S122.

[0051] S121: Determine the outer ring temperature-current conversion coefficient and compressor compensation current corresponding to the compressor according to the specification parameters of the compressor.

[0052] Here, experiments can be conducted in advance according to compressors of different specifications to obtain sufficient experimental data including outdoor ambient temperature data and compressor reference current data; then fitting operations are performed on the experimental data to determine the outer ring temperature-current conversion coefficient and compressor compensation current corresponding to compressors of different specifications, and then a database of compressors and outer ring temperature-current conversion coefficients and compressor compensation currents is established, and the database is pre-set in the control system of the air conditioner 1. In this way, according to the specification parameters of the compressor, the outer ring temperature-current conversion coefficient and compressor compensation current corresponding to the compressor can be determined based on the above database.

[0053] S122: Determine the reference current of the compressor according to the outdoor ambient temperature, the outer ring temperature-current conversion coefficient and the compressor compensation current. For example, the product of the outdoor ambient temperature and the outer ring temperature-current conversion coefficient can be first obtained, and then the sum of the product and the compressor compensation current can be obtained, and the sum is used as the reference current of the compressor.

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

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

[0056] S21: Determine the subcooling range in which the subcooling of the condenser is located.

[0057] Here, a number of continuously distributed supercooling intervals can be pre-set in the control system of the air conditioner 1, and a corresponding wind speed correction strategy for the outdoor fan can be set for each supercooling interval. The number of supercooling intervals and the length of each supercooling interval can be determined according to actual needs, and the embodiments of the present application do not limit this; generally speaking, if the number of supercooling intervals is large, the number of wind speed correction strategies set is large, the matching degree of each wind speed correction strategy and the supercooling interval is high, and the classification accuracy of the wind speed correction strategy is high; similarly, if the length of each supercooling interval is short, the temperature range corresponding to each wind speed correction strategy is small, the matching degree of each wind speed correction strategy and the supercooling interval is high, and the classification accuracy of the wind speed correction strategy is high.

[0058] In some examples, at least four supercooling intervals may be set. The at least four supercooling intervals include a first supercooling interval, a second supercooling interval, a third supercooling interval, and a fourth supercooling interval that are sequentially and continuously distributed along the temperature drop direction, and a corresponding wind speed correction strategy of the outdoor fan is set for each supercooling interval. Among them, the first supercooling interval is a supercooling interval less than or equal to the first threshold supercooling degree, the second supercooling interval is a supercooling interval greater than the first threshold supercooling degree and less than or equal to the second threshold supercooling degree, the third supercooling interval is a supercooling interval greater than or equal to the second threshold supercooling degree and less than or equal to the third threshold supercooling degree, and the fourth supercooling interval is a supercooling interval greater than the third threshold supercooling degree.

[0059] S22: Determine a wind speed correction strategy for the outdoor fan according to the subcooling range.

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

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

[0062] S222: In response to determining that the subcooling degree of the condenser is in a second subcooling degree interval, determining a wind speed correction strategy for the outdoor fan to control the wind speed of the outdoor fan to increase by one level at every first preset time interval, and the wind speed of the outdoor fan is not higher than the second highest wind speed.

[0063] When it is determined that the supercooling degree of the condenser is in the second supercooling degree range, it indicates that the heat exchange efficiency of the condenser is low, and it is necessary to control the outdoor fan to gradually rise to the second highest wind speed to match and improve the heat exchange efficiency of the condenser. The specific value of the first preset time interval can be determined according to actual needs, and the embodiment of the present application does not limit this; for example, the first preset time interval can be 2min to 4min.

[0064] S223: In response to determining that the supercooling degree of the condenser is in the third supercooling degree interval, determining that the wind speed correction strategy of the outdoor fan is to control the outdoor fan to maintain the current wind speed operation. When it is determined that the supercooling degree of the condenser is in the third supercooling degree interval, it means that the heat exchange efficiency of the condenser is relatively matched with the cooling demand of the air conditioner 1, and there is no need to intervene in the wind speed of the outdoor fan.

[0065] S224: In response to determining that the supercooling degree of the condenser is in the fourth supercooling degree interval, determine the wind speed correction strategy of the outdoor fan 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. When it is determined that the supercooling degree of the condenser is in the fourth supercooling degree interval, it means that the heat exchange efficiency of the condenser is too high and the supercooling is excessive. It is necessary to control the outdoor fan to gradually decrease to the lowest wind speed to reduce the operating power consumption of the air conditioner 1 and the risk of liquid hammer damage to the compressor. The specific value of the second preset time interval can be determined according to actual needs, and the embodiment of the present application is not limited to this; for example, the second preset time interval can be 2min~4min.

[0066] S23: Correcting the wind speed of the outdoor fan according to the wind speed correction strategy of the outdoor fan.

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

[0068] S30: In response to the air conditioner 1 being in the cooling operation mode and entering the stable operation stage, determining whether the outdoor ambient temperature is greater than or equal to a high-load outer loop temperature threshold. Here, the high-load outer loop temperature threshold may be pre-set 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 wind 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 wind speed to quickly match and meet the high environmental load, thereby ensuring that the heat exchange efficiency of the condenser can be relatively matched with the cooling demand.

[0070] In a second aspect, an embodiment of the present application provides an outdoor fan control device, which includes a correction circuit, and the correction circuit is configured to perform the following operations: in response to the air conditioner 1 being in a cooling operation mode and entering a stable operation stage, determining the subcooling of the condenser according to the outdoor coil temperature, the outdoor ambient temperature and the instantaneous current of the compressor; and correcting the wind speed of the outdoor fan according to the subcooling of the condenser.

[0071] like Figure 8 As shown, in the third aspect, an embodiment of the present application provides an air conditioner 1, which includes an outdoor fan, a processor 10 and a memory 20, and 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] The processor 10 is connected to the memory 20, and can perform various actions and processes according to the program stored in the memory 20. Specifically, the processor 10 can be an integrated circuit chip with signal processing capabilities. The above-mentioned processor 10 can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc., which can be an X86 architecture or an ARM architecture.

[0073] The memory 20 may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is 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), synchronously linked dynamic random access memory (SLDRAM), and direct memory bus random access memory (DRRAM). It should be noted that the memory 20 of the method described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0074] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. The computer program is loaded by the processor 10 to execute the steps in the control method of any of the above embodiments.

[0075] Exemplarily, the above-mentioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or magnetic tapes, etc.), optical disks (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 the present 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 is a detailed introduction to an outdoor fan control method, device, air conditioner and computer-readable storage medium provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for controlling an outdoor fan, characterized in that: Used to control an outdoor fan in an air conditioner, the outdoor fan control method comprises: In response to the air conditioner being in a cooling operation mode and entering a stable operation stage, determining a subcooling degree of the condenser according to an outdoor coil temperature, an outdoor ambient temperature and an instantaneous current of the compressor; The windshield of the outdoor fan is corrected according to the subcooling degree of the condenser.

2. The outdoor fan control method according to claim 1, characterized in that: Determine the subcooling of the condenser based on the outdoor coil temperature, outdoor ambient temperature and compressor instantaneous current, including: Determining the subcooling temperature of the condenser according to the outdoor coil temperature, the outdoor ambient temperature and the condensation compensation temperature; Determining a reference current of the compressor according to the outdoor ambient temperature and the compressor compensation current; determining a saturation temperature of the condenser according to a subcooling temperature of the condenser, a reference current of the compressor, and an instantaneous current of the compressor; The subcooling degree of the condenser is determined according to the subcooling temperature and the saturation temperature of the condenser.

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

4. The outdoor fan control method according to claim 2, characterized in that: Determining a reference current of the compressor according to the outdoor ambient temperature and the compressor compensation current includes: Determine, according to the specification parameters of the compressor, the outer ring temperature-current conversion coefficient and the compressor compensation current corresponding to the compressor; The reference current of the compressor is determined according to the outdoor ambient temperature, the outer ring temperature-current conversion coefficient and the compressor compensation current.

5. The outdoor fan control method according to claim 1, characterized in that: The windshield of the outdoor fan is corrected according to the subcooling degree of the condenser, including: Determining a subcooling range in which the subcooling of the condenser lies; Determining a wind speed correction strategy for the outdoor fan according to the undercooling range; The windshield of the outdoor fan is corrected according to the windshield correction strategy of the outdoor fan.

6. The outdoor fan control method according to claim 5, characterized in that: The subcooling intervals include a first subcooling interval, a second subcooling interval, a third subcooling interval and a fourth subcooling interval which are successively distributed in the temperature decreasing direction; Determining a windshield correction strategy for the outdoor fan according to the undercooling range includes: In response to determining that the subcooling degree of the condenser is in a first subcooling degree interval, determining that the wind speed correction strategy of the outdoor fan is to control the outdoor fan to operate at a highest wind speed; In response to determining that the subcooling degree of the condenser is in a second subcooling degree interval, determining a wind speed correction strategy for the outdoor fan 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 degree of the condenser is in a third subcooling degree interval, determining that the wind speed correction strategy of the outdoor fan is to control the outdoor fan to maintain the current wind speed operation; In response to determining that the subcooling degree of the condenser is in a fourth subcooling degree interval, a wind speed correction strategy for the outdoor fan is determined to control the wind speed of the outdoor fan to drop by one level every second preset time interval, and the wind speed of the outdoor fan is not lower than the lowest wind speed.

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

8. An outdoor fan control device, characterized in that: A correction circuit is included, wherein the correction circuit is configured to perform the following operations: In response to the air conditioner being in a cooling operation mode and entering a stable operation stage, determining a subcooling degree of the condenser according to an outdoor coil temperature, an outdoor ambient temperature and an instantaneous current of the compressor; The windshield of the outdoor fan is corrected according to the subcooling degree of the condenser.

9. An air conditioner, characterized in that: include: Outdoor fan; a memory storing a computer program; A processor, wherein when the computer program is executed by the processor, the outdoor fan control method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in the outdoor fan control method according to any one of claims 1 to 7.

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