Low-temperature refrigeration control method and device, air conditioner and storage medium

Abstract

This application relates to the field of air conditioning technology, specifically to a low-temperature refrigeration control method, device, air conditioner, and storage medium. The low-temperature refrigeration control method includes: acquiring current external temperature data; when the current external temperature data is less than or equal to a first temperature threshold, matching based on the current external temperature data to obtain target parameters; the target parameters include at least one of a target compressor frequency, a target outdoor fan speed, a target condenser tube temperature when the fan is off, and a target condenser tube temperature when the fan is on; controlling a target component of the air conditioner to operate based on the target parameters; the target component includes at least one of a compressor and an outdoor fan. This application can improve the problem of large fluctuations in condenser tube temperature during ultra-low temperature refrigeration and improve the stability of air conditioner operation under ultra-low temperature refrigeration conditions.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, specifically to a low-temperature refrigeration control method, device, air conditioner, and storage medium. Background Technology

[0002] Currently, when air conditioners operate in ultra-low temperature cooling mode, the condenser pipe temperature sensors are typically positioned at the lowest temperature point of the condenser to accommodate defrosting needs, resulting in lower-than-expected pipe temperatures detected in extremely low environments. Simultaneously, the system compressor frequency increases, exacerbating load shocks and causing rapid changes in refrigerant pressure and temperature, leading to pipe temperature fluctuations. Therefore, when air conditioners operate in ultra-low temperature cooling mode, significant fluctuations in external pipe temperature may occur, affecting the stability of the air conditioner's cooling performance. Summary of the Invention

[0003] This application provides a low-temperature refrigeration control method, device, air conditioner, and storage medium, which can improve the problem of large temperature fluctuations in condenser tubes during ultra-low temperature refrigeration and enhance the stability of air conditioner operation under ultra-low temperature refrigeration conditions.

[0004] In a first aspect, embodiments of this application provide a low-temperature refrigeration control method, the low-temperature refrigeration control method comprising: Obtain the current outside temperature data; When the current external temperature data is less than or equal to the first temperature threshold, a target parameter is obtained by matching based on the current external temperature data; the target parameter includes at least one of the target compressor frequency, target external fan speed, target fan-stopped condenser tube temperature, and target fan-on condenser tube temperature. The target component controlling the air conditioner operates based on the target parameters; the target component includes at least one of a compressor and an outdoor fan.

[0005] In some embodiments, matching based on the current external temperature data to obtain the target parameter includes: The target compressor frequency is obtained by matching the current external temperature data, the first preset external temperature, the first compressor frequency, the second preset external temperature, and the second compressor frequency; both the first preset external temperature and the second preset external temperature are greater than the second temperature threshold and less than or equal to the first temperature threshold; and / or, The target external fan speed is obtained by matching the current external temperature data and the speed of the first external fan; and / or, Based on the current external temperature data and the first condenser tube temperature, the target fan-stopped condenser tube temperature is obtained; and / or, The target fan-activated condenser tube temperature is obtained by matching the current external temperature data with the second condenser tube temperature.

[0006] In some embodiments, the step of matching the current external temperature data, a first preset external temperature, a first compressor frequency, a second preset external temperature, and a second compressor frequency to obtain the target compressor frequency includes: When the second temperature threshold < the current external temperature data ≤ the first temperature threshold, the first compressor frequency is subtracted from the second compressor frequency to obtain a first difference, the second preset external temperature is subtracted from the first preset external temperature to obtain a second difference, the current external temperature data is subtracted from the first preset external temperature to obtain a third difference, the first difference is divided by the second difference to obtain a first quotient, the first quotient is multiplied by the third difference to obtain a first product, and the first compressor frequency is subtracted from the first product to obtain the target compressor frequency; When the third temperature threshold < the current external temperature data ≤ the second temperature threshold, the first compressor frequency and the first product are added to obtain the target compressor frequency; When the fourth temperature threshold < the current external temperature data ≤ the third temperature threshold, the first compressor frequency and the first product are added to obtain the target compressor frequency; When the fifth temperature threshold < the current external temperature data ≤ the fourth temperature threshold, the first compressor frequency and the first product are added to obtain the first sum, and the first sum is multiplied by the first frequency coefficient to obtain the target compressor frequency; When the current external temperature data is less than or equal to the fifth temperature threshold, the first compressor frequency and the first product are added together to obtain a first sum, and the first sum is multiplied by the first frequency coefficient to obtain the target compressor frequency.

[0007] In some embodiments, the step of matching the current external temperature data and the rotational speed of the first external fan to obtain the target external fan speed includes: When the second temperature threshold < the current external temperature data ≤ the first temperature threshold, the target external fan speed is determined to be the first external fan speed; When the third temperature threshold < the current external temperature data ≤ the second temperature threshold, the first external fan speed is multiplied by the first speed coefficient to obtain the target external fan speed; When the fourth temperature threshold < the current external temperature data ≤ the third temperature threshold, the first external fan speed is multiplied by the second speed coefficient to obtain the target external fan speed; When the fifth temperature threshold < the current external temperature data ≤ the fourth temperature threshold, the first external fan speed is multiplied by the third speed coefficient to obtain the target external fan speed; When the current external temperature data is less than or equal to the fifth temperature threshold, the first external fan speed is multiplied by the fourth speed coefficient to obtain the target external fan speed. Wherein, the fourth speed coefficient < the third speed coefficient < the second speed coefficient < the first speed coefficient.

[0008] In some embodiments, the step of matching the current external temperature data and the first condenser tube temperature to obtain the target fan-stopped condenser tube temperature includes: When the second temperature threshold < the current external temperature data ≤ the first temperature threshold, the target fan stop condenser tube temperature is determined to be the first condenser tube temperature; When the third temperature threshold is less than the current external temperature data and less than the second temperature threshold, the first condenser tube temperature and the first tube temperature parameter are added together to obtain the target fan stop condenser tube temperature. When the fourth temperature threshold < the current external temperature data ≤ the third temperature threshold, the first condenser tube temperature and the second tube temperature parameter are added together to obtain the target fan stop condenser tube temperature. When the fifth temperature threshold < the current external temperature data ≤ the fourth temperature threshold, the first condenser tube temperature and the third tube temperature parameter are added together to obtain the target fan stop condenser tube temperature. When the current external temperature data is less than or equal to the fifth temperature threshold, the first condenser tube temperature and the fourth tube temperature parameter are added together to obtain the target fan stop condenser tube temperature. Wherein, the first pipe temperature parameter < the second pipe temperature parameter < the third pipe temperature parameter < the fourth pipe temperature parameter.

[0009] In some embodiments, obtaining the target fan-activated condenser tube temperature by matching the current external temperature data with the second condenser tube temperature includes: When the second temperature threshold is less than the current external temperature data and less than the first temperature threshold, the target fan condenser tube temperature is determined to be the second condenser tube temperature. When the third temperature threshold < the current external temperature data ≤ the second temperature threshold, the second condenser tube temperature is subtracted from the fifth tube temperature parameter to obtain the target fan-activated condenser tube temperature; When the fourth temperature threshold is less than the current external temperature data and less than the third temperature threshold, the second condenser tube temperature and the sixth tube temperature parameter are subtracted to obtain the target fan-start condenser tube temperature. When the fifth temperature threshold is less than the current external temperature data and less than the fourth temperature threshold, the second condenser tube temperature and the seventh tube temperature parameter are subtracted to obtain the target fan-start condenser tube temperature. When the current external temperature data is less than or equal to the fifth temperature threshold, the second condenser tube temperature is subtracted from the eighth tube temperature parameter to obtain the target fan-activated condenser tube temperature. Wherein, the fifth tube temperature parameter < the sixth tube temperature parameter < the seventh tube temperature parameter < the eighth tube temperature parameter.

[0010] In some embodiments, the target parameters include a target outdoor fan speed, a target condenser tube temperature when the fan is off, and a target condenser tube temperature when the fan is on. The target component controlling the air conditioner operates based on the target parameters, including: Get the current condenser tube temperature; When the current condenser tube temperature is greater than the target fan stop condenser tube temperature, the external fan is controlled to operate based on the target external fan speed. When the current condenser tube temperature is less than or equal to the target fan stop condenser tube temperature, the external fan is controlled to pause operation and return to the step of obtaining the current condenser tube temperature until the current condenser tube temperature is greater than the target fan stop condenser tube temperature, at which point the external fan is controlled to operate based on the target external fan speed.

[0011] Secondly, embodiments of this application provide a cryogenic refrigeration control device, the cryogenic refrigeration control device comprising: The external temperature acquisition module is used to acquire the current external temperature data; The parameter matching module is used to match the current external temperature data to obtain target parameters when the current external temperature data is less than or equal to a first temperature threshold. The target parameters include at least one of the following: target compressor frequency, target external fan speed, target fan-stopped condenser tube temperature, and target fan-on condenser tube temperature. An air conditioning control module is used to control the target components of the air conditioner to operate based on the target parameters; the target components include at least one of a compressor and an outdoor fan.

[0012] Thirdly, embodiments of this application provide an air conditioner, the air conditioner including: one or more processors, a memory, and one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the low-temperature refrigeration control method 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 cryogenic refrigeration control method described in any of the above embodiments.

[0014] This application provides a low-temperature refrigeration control method, device, air conditioner, and storage medium. By matching and adjusting the operating parameters of the main components of the air conditioner based on the current external temperature data, it can improve the problem of large fluctuations in condenser tube temperature during ultra-low temperature refrigeration, and enhance the stability of air conditioner operation under ultra-low temperature refrigeration conditions. This method enables the air conditioning system to maintain stable refrigeration performance in low-temperature environments, improves operating efficiency and user comfort, and broadens the application range of air conditioners. Attached Figure Description

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

[0016] Figure 1 This is a schematic flowchart of a low-temperature refrigeration control method provided in an embodiment of the present invention; Figure 2 This is a flowchart illustrating a target parameter matching method provided in an embodiment of the present invention; Figure 3 This is a flowchart illustrating a method for controlling a target component of an air conditioner to operate based on target parameters, according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of a cryogenic refrigeration control device provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0017] 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.

[0018] In the description of this application, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," "third," etc., may explicitly or implicitly include one or more features.

[0019] 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.

[0020] It should be noted that since the method in this application embodiment is executed in a computer device, the processing objects of each computer device exist in the form of data or information, such as time, which is essentially time information. It is understood that if size, quantity, position, etc. are mentioned in subsequent embodiments, they are all corresponding data that exist so that the computer device can process them. Specific details will not be elaborated here.

[0021] This application provides a low-temperature refrigeration control method, such as... Figure 1 As shown, the low-temperature refrigeration control method includes: Step S1: Obtain the current outside temperature data.

[0022] Step S2: When the current external temperature data is less than or equal to the first temperature threshold, match the current external temperature data to obtain the target parameters; the target parameters include at least one of the target compressor frequency, target external fan speed, target fan-stopped condenser tube temperature, and target fan-started condenser tube temperature.

[0023] Step S3: Control the target components of the air conditioner to operate based on target parameters; the target components include at least one of the compressor and the outdoor fan.

[0024] The current external temperature data refers to the real-time value of the external ambient temperature of the air conditioning equipment's operating environment.

[0025] The first temperature threshold is the temperature limit used to determine whether to enter the low-temperature cooling control mode. When the external ambient temperature is lower than or equal to this threshold, the system will activate the low-temperature cooling parameter matching and control logic. The first temperature threshold can be set according to actual needs; for example, it can be set to 14℃.

[0026] Target parameters refer to the set of air conditioning operation control parameters matched based on the current outside temperature data under low temperature refrigeration conditions. These parameters may include at least one of the following: target compressor frequency, target outdoor fan speed, target fan-stopped condenser tube temperature, and target fan-on condenser tube temperature. These parameters are used to guide the operation of the main components of the air conditioner.

[0027] The target component refers to the main actuator in an air conditioning system that needs to be controlled to achieve a low-temperature cooling effect. It may include at least one of the compressor and the outdoor fan. The operating status of these components directly affects the cooling performance and the stability of the system operation.

[0028] In this embodiment, by matching and adjusting the operating parameters of the main components of the air conditioner based on the current external temperature data, the problem of large temperature fluctuations in the condenser tubes during ultra-low temperature cooling can be improved, thereby enhancing the stability of the air conditioner's operation under ultra-low temperature cooling conditions. This method enables the air conditioning system to maintain stable cooling performance in low-temperature environments, improving operating efficiency and user comfort, and broadening the application range of air conditioning.

[0029] In some embodiments, such as Figure 2 As shown, the step S2 above, which involves matching based on the current external temperature data to obtain the target parameter, includes: Step S21: Match the current external temperature data, the first preset external temperature, the first compressor frequency, the second preset external temperature, and the second compressor frequency to obtain the target compressor frequency; both the first preset external temperature and the second preset external temperature are greater than the second temperature threshold and less than or equal to the first temperature threshold; and / or, Step S22: Match the current outdoor temperature data and the speed of the first outdoor fan to obtain the target outdoor fan speed; and / or, Step S23: Match the current external temperature data with the first condenser tube temperature to obtain the target fan stop condenser tube temperature; and / or, Step S24: Match the current external temperature data and the second condenser tube temperature to obtain the target fan start-up condenser tube temperature.

[0030] The first preset external temperature and the second preset external temperature are two pre-set external temperature sampling points located between a first temperature threshold and a second temperature threshold. The second preset external temperature is greater than the first preset external temperature, and both are within the range between the first and second temperature thresholds.

[0031] The second temperature threshold is a preset temperature limit value. The second temperature threshold is lower than the first temperature threshold. The specific second temperature threshold can be set according to actual needs; for example, it can be set to -7℃.

[0032] The first compressor frequency is the compressor operating frequency corresponding to the first preset external temperature.

[0033] The second compressor frequency is the compressor operating frequency corresponding to the second preset external temperature.

[0034] Among them, the condenser tube temperature when the fan stops is the temperature threshold that controls the outdoor fan to stop operating.

[0035] Among them, the condenser tube temperature when the fan is turned on is the temperature threshold for controlling the restart of the outdoor fan.

[0036] The first outdoor fan speed is the outdoor fan speed corresponding to the first preset outdoor temperature and the second preset outdoor temperature. The first preset outdoor temperature and the second preset outdoor temperature are located between the first temperature threshold and the second temperature threshold, that is, the first preset outdoor temperature and the second preset outdoor temperature are in the same temperature range. Therefore, the same outdoor fan speed, the same condenser tube temperature when the fan is stopped, and the same condenser tube temperature when the fan is turned on are used.

[0037] The first condenser tube temperature is the fan-stopped condenser tube temperature corresponding to the first preset outside temperature and the second preset outside temperature.

[0038] The second condenser tube temperature is the fan-activated condenser tube temperature corresponding to the first preset outside temperature and the second preset outside temperature.

[0039] In this embodiment, by dynamically adjusting the compressor frequency based on current external environmental data, the accurate output of cooling capacity under different low-temperature conditions can be ensured, avoiding energy waste or insufficient cooling. By optimizing the outdoor fan speed, the condensing pressure can be controlled to prevent the system from being over- or under-pressured, thereby improving the stability and reliability of operation. At the same time, by dynamically adjusting the condenser tube temperature threshold for fan start-stop, the operation of the outdoor fan can be controlled more intelligently, ensuring heat dissipation requirements while reducing unnecessary fan running time, thus significantly improving the energy efficiency and overall economic efficiency of the air conditioning system under low-temperature cooling conditions.

[0040] In some embodiments, step S21 above, matching the current external temperature data, the first preset external temperature, the first compressor frequency, the second preset external temperature, and the second compressor frequency to obtain the target compressor frequency, includes: when the second temperature threshold < the current external temperature data ≤ the first temperature threshold, subtracting the second compressor frequency from the first compressor frequency to obtain a first difference, subtracting the first preset external temperature from the second preset external temperature to obtain a second difference, subtracting the first preset external temperature from the current external temperature data to obtain a third difference, dividing the first difference by the second difference to obtain a first quotient, multiplying the first quotient by the third difference to obtain a first product, and subtracting the first product from the first compressor frequency to obtain the target compressor frequency; when the third temperature threshold < the current external temperature data When the temperature is ≤ the second temperature threshold, the first compressor frequency and the first product are added to obtain the target compressor frequency; when the fourth temperature threshold < the current external temperature data ≤ the third temperature threshold, the first compressor frequency and the first product are added to obtain the target compressor frequency; when the fifth temperature threshold < the current external temperature data ≤ the fourth temperature threshold, the first compressor frequency and the first product are added to obtain the first sum, and the first sum is multiplied by the first frequency coefficient to obtain the target compressor frequency; when the current external temperature data ≤ the fifth temperature threshold, the first compressor frequency and the first product are added to obtain the first sum, and the first sum is multiplied by the first frequency coefficient to obtain the target compressor frequency.

[0041] The value of the first frequency coefficient can be set according to actual needs; for example, it can be set to 3 / 5.

[0042] Among them, the first temperature threshold, the second temperature threshold, the third temperature threshold, the fourth temperature threshold, and the fifth temperature threshold are all preset temperature limit values. Furthermore, the order is: first temperature threshold > second temperature threshold > third temperature threshold > fourth temperature threshold > fifth temperature threshold.

[0043] Specifically, based on the current external temperature data, five temperature zones are defined. The first temperature zone is defined as follows: Second temperature threshold < Current external temperature data ≤ First temperature threshold. The second temperature zone is defined as follows: Third temperature threshold < Current external temperature data ≤ Second temperature threshold. The third temperature zone is defined as follows: Fourth temperature threshold < Current external temperature data ≤ Third temperature threshold. The fourth temperature zone is defined as follows: Fifth temperature threshold < Current external temperature data ≤ Fourth temperature threshold. The fifth temperature zone is defined as follows: Current external temperature data ≤ Fifth temperature threshold.

[0044] The values ​​of the first temperature threshold, the second temperature threshold, the third temperature threshold, the fourth temperature threshold, and the fifth temperature threshold can be set according to actual needs. For example, the first temperature threshold can be set to 14℃, the second temperature threshold to -7℃, the third temperature threshold to -13℃, the fourth temperature threshold to -16℃, and the fifth temperature threshold to -23℃.

[0045] In this embodiment, the target compressor frequency can be determined using a segmented calculation method based on the different temperature ranges of the current external temperature data. This multi-segment calculation logic combines strategies such as linear interpolation, fixed incremental adjustment, and proportional coefficient correction, enabling the compressor's operating frequency to more accurately match the actual cryogenic refrigeration requirements. Therefore, the system can avoid control deviations caused by a single or coarse matching method, thereby improving the operating efficiency and stability of the cryogenic refrigeration system.

[0046] In some embodiments, step S22, matching the current external temperature data and the first external fan speed to obtain the target external fan speed, includes: when the second temperature threshold < the current external temperature data ≤ the first temperature threshold, determining the target external fan speed as the first external fan speed; when the third temperature threshold < the current external temperature data ≤ the second temperature threshold, multiplying the first external fan speed by the first speed coefficient to obtain the target external fan speed; when the fourth temperature threshold < the current external temperature data ≤ the third temperature threshold, multiplying the first external fan speed by the second speed coefficient to obtain the target external fan speed; when the fifth temperature threshold < the current external temperature data ≤ the fourth temperature threshold, multiplying the first external fan speed by the third speed coefficient to obtain the target external fan speed; when the current external temperature data ≤ the fifth temperature threshold, multiplying the first external fan speed by the fourth speed coefficient to obtain the target external fan speed; wherein, the fourth speed coefficient < the third speed coefficient < the second speed coefficient < the first speed coefficient.

[0047] Specifically, the first, second, third, and fourth speed coefficients are used as adjustment coefficients for the external fan speed, and their values ​​can be set according to actual needs. They are usually in the range of (0,1). For example, the first speed coefficient can be set to 8 / 9, the second speed coefficient to 2 / 3, the third speed coefficient to 3 / 7, and the fourth speed coefficient to 3 / 14.

[0048] In this embodiment, the target outdoor fan speed can be dynamically adjusted according to the different low-temperature ranges of the current ambient temperature data. In higher low-temperature ranges, a preset first outdoor fan speed is directly used to ensure basic cooling capacity. In lower temperature ranges, the target outdoor fan speed is gradually reduced as the ambient temperature decreases by multiplying the first outdoor fan speed with a decreasing speed coefficient. This segmented, coefficient-corrected matching method avoids energy waste and unnecessary noise caused by the outdoor fan operating at excessively high speeds at extremely low temperatures. Simultaneously, it ensures that the outdoor fan operates at the most suitable speed under different low-temperature conditions, maintaining stable condenser pressure and preventing frost formation, thereby improving the operating efficiency, stability, and reliability of the low-temperature refrigeration system.

[0049] In some embodiments, step S23 above, matching the current external temperature data and the first condenser tube temperature to obtain the target fan-stopped condenser tube temperature, includes: when the second temperature threshold < the current external temperature data ≤ the first temperature threshold, determining the target fan-stopped condenser tube temperature as the first condenser tube temperature; when the third temperature threshold < the current external temperature data ≤ the second temperature threshold, adding the first condenser tube temperature to the first tube temperature parameter to obtain the target fan-stopped condenser tube temperature; when the fourth temperature threshold < the current external temperature data ≤ the third temperature threshold, adding the first condenser tube temperature to the second tube temperature parameter to obtain the target fan-stopped condenser tube temperature; when the fifth temperature threshold < the current external temperature data ≤ the fourth temperature threshold, adding the first condenser tube temperature to the third tube temperature parameter to obtain the target fan-stopped condenser tube temperature; when the current external temperature data ≤ the fifth temperature threshold, adding the first condenser tube temperature to the fourth tube temperature parameter to obtain the target fan-stopped condenser tube temperature. Among them, the first pipe temperature parameter < the second pipe temperature parameter < the third pipe temperature parameter < the fourth pipe temperature parameter.

[0050] Specifically, the first, second, third, and fourth pipe temperature parameters are used as adjustment parameters for the condenser pipe temperature when the fan stops, and their values ​​can be set according to actual needs. For example, the first pipe temperature parameter can be set to 7, the second pipe temperature parameter can be set to 10, the third pipe temperature parameter can be set to 12, and the fourth pipe temperature parameter can be set to 15.

[0051] In this embodiment, by setting multiple temperature thresholds, the low-temperature range is divided into several sub-ranges, and the target fan-stop condenser tube temperature is dynamically adjusted for each sub-range. Specifically, as the current external temperature gradually decreases from a higher low-temperature range to a lower or even extreme low-temperature range, the target fan-stop condenser tube temperature is gradually increased based on the first condenser tube temperature by adding it to the increasing tube temperature parameter. This segmented adjustment strategy allows the system to adjust according to actual external temperature conditions.

[0052] In some embodiments, step S24 above, matching the current external temperature data and the second condenser tube temperature to obtain the target fan-operated condenser tube temperature, includes: when the second temperature threshold < the current external temperature data ≤ the first temperature threshold, determining the target fan-operated condenser tube temperature as the second condenser tube temperature; when the third temperature threshold < the current external temperature data ≤ the second temperature threshold, subtracting the second condenser tube temperature from the fifth tube temperature parameter to obtain the target fan-operated condenser tube temperature; when the fourth temperature threshold < the current external temperature data ≤ the third temperature threshold, subtracting the second condenser tube temperature from the sixth tube temperature parameter to obtain the target fan-operated condenser tube temperature; when the fifth temperature threshold < the current external temperature data ≤ the fourth temperature threshold, subtracting the second condenser tube temperature from the seventh tube temperature parameter to obtain the target fan-operated condenser tube temperature; when the current external temperature data ≤ the fifth temperature threshold, subtracting the second condenser tube temperature from the eighth tube temperature parameter to obtain the target fan-operated condenser tube temperature; wherein, the fifth tube temperature parameter < the sixth tube temperature parameter < the seventh tube temperature parameter < the eighth tube temperature parameter.

[0053] Specifically, the fifth, sixth, seventh, and eighth pipe temperature parameters are used as adjustment parameters for the condenser pipe temperature when the fan starts, and their values ​​can be set according to actual needs. For example, the fifth pipe temperature parameter can be set to 2, the sixth pipe temperature parameter can be set to 4, the seventh pipe temperature parameter can be set to 6, and the eighth pipe temperature parameter can be set to 8.

[0054] In this embodiment, the low-temperature external temperature range is divided into multiple temperature intervals, and different calculation logic for the target fan-activated condenser tube temperature is set for each interval. Specifically, when the current external temperature data is in a relatively low temperature range, the target fan-activated condenser tube temperature can be directly adopted as the second condenser tube temperature, or only slightly adjusted. When the current external temperature data decreases further, the target fan-activated condenser tube temperature is dynamically adjusted downwards as the external temperature decreases by subtracting progressively increasing tube temperature parameters (the fifth, sixth, seventh, and eighth tube temperature parameters) from the second condenser tube temperature. This adjustment strategy ensures that the condenser can always maintain within the optimal heat exchange temperature difference range under different low-temperature environments. Under extremely low external temperature conditions, a lower target fan-activated condenser tube temperature can reduce the occurrence of system shutdown due to excessively low condenser pressure, ensuring the stable operation and continuous cooling capacity of the refrigeration system.

[0055] Specifically, the following provides examples of the target compressor frequency, target external fan speed, target fan-stopped condenser tube temperature, and target fan-started condenser tube temperature, as shown in Table 1 below: Table 1 Target Parameter Values

[0056] As shown in Table 1, t1 represents the first preset outside temperature, t2 represents the second preset outside temperature, t represents the current outside temperature data, R1 represents the first outside fan speed, T1 represents the first condenser tube temperature, and T2 represents the second condenser tube temperature. In Table 1, the first temperature threshold is set to 14℃, the second temperature threshold is set to -7℃, the third temperature threshold is set to -13℃, the fourth temperature threshold is set to -16℃, and the fifth temperature threshold is set to -23℃.

[0057] The first frequency coefficient is taken as 3 / 5.

[0058] The first speed coefficient can be set to 8 / 9, the second speed coefficient can be set to 2 / 3, the third speed coefficient can be set to 3 / 7, and the fourth speed coefficient can be set to 3 / 14.

[0059] The first pipe temperature parameter can be set to 7, the second pipe temperature parameter can be set to 10, the third pipe temperature parameter can be set to 12, and the fourth pipe temperature parameter can be set to 15.

[0060] The fifth tube temperature parameter can be set to 2, the sixth tube temperature parameter can be set to 4, the seventh tube temperature parameter can be set to 6, and the eighth tube temperature parameter can be set to 8.

[0061] In some embodiments, the target parameters include the target external fan speed, the target condenser tube temperature when the target fan is off, and the target condenser tube temperature when the target fan is on. For example... Figure 3 As shown, step S3 above, controlling the target component of the air conditioner to operate based on the target parameters, includes: Step S31: Obtain the current condenser tube temperature.

[0062] Step S32: When the current condenser tube temperature is greater than the target fan stop condenser tube temperature, control the outdoor fan to operate based on the target outdoor fan speed.

[0063] Step S33: When the current condenser tube temperature is less than or equal to the target fan stop condenser tube temperature, control the outdoor fan to stop working and return to the step of obtaining the current condenser tube temperature until the current condenser tube temperature is greater than the target fan stop condenser tube temperature, then control the outdoor fan to work based on the target outdoor fan speed.

[0064] The current condenser tube temperature is the real-time monitored temperature of the refrigerant as it flows through the condenser.

[0065] In this embodiment, when the current condenser tube temperature is lower than the target fan-stop condenser tube temperature, the outdoor fan stops operating. This prevents excessive heat dissipation from the condenser, which could lead to excessively low system pressure, thus protecting the compressor and improving the system's operational stability and energy efficiency under low-temperature conditions. Simultaneously, by continuously monitoring the condenser tube temperature and promptly starting the outdoor fan at the target fan speed when it rises above the target fan-stop condenser tube temperature, it ensures that the condenser can exchange heat promptly when heat dissipation is needed, preventing excessively high condenser pressure and maintaining the cooling effect.

[0066] Secondly, embodiments of this application provide a cryogenic refrigeration control device 200, such as... Figure 4 As shown, the cryogenic refrigeration control device 200 includes: The external temperature acquisition module 201 is used to acquire the current external temperature data; The parameter matching module 202 is used to match the current external temperature data to obtain target parameters when the current external temperature data is less than or equal to a first temperature threshold. The target parameters include at least one of the target compressor frequency, target external fan speed, target fan-stopped condenser tube temperature, and target fan-on condenser tube temperature. The air conditioning control module 203 is used to control the target components of the air conditioner to work based on target parameters; the target components include at least one of a compressor and an outdoor fan.

[0067] It should be noted that the cryogenic refrigeration control device 200 includes functional modules capable of implementing the cryogenic refrigeration control method in any of the above embodiments, as detailed in the above method embodiments, which will not be repeated here.

[0068] This application also provides an air conditioner, which includes one or more processors, a memory, and one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the low-temperature cooling control method in any of the above embodiments.

[0069] This application also provides an electronic device that integrates any of the cryogenic refrigeration control devices provided in this application. For example... Figure 5 As shown, it illustrates a structural schematic diagram of the electronic device involved in the embodiments of this application, specifically: The electronic device may include components such as a processor 801 with one or more processing cores, a memory 802 with one or more computer-readable storage media, a power supply 803, and an input unit 804. Those skilled in the art will understand that... Figure 5 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein: The processor 801 is the control center of the electronic device. It connects various parts of the electronic device via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 802, and by calling data stored in the memory 802, it performs various functions and processes data, thereby providing overall monitoring of the electronic device. Optionally, the processor 801 may include one or more processing cores; preferably, the processor 801 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, and the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 801.

[0070] The memory 802 can be used to store software programs and modules. The processor 801 executes various functional applications and data processing by running the software programs and modules stored in the memory 802. The memory 802 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 802 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 802 may also include a memory controller to provide the processor 801 with access to the memory 802.

[0071] The electronic device also includes a power supply 803 that supplies power to the various components. Preferably, the power supply 803 can be logically connected to the processor 801 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 803 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0072] The electronic device may also include an input unit 804, which can be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0073] Although not shown, the electronic device may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 801 in the electronic device loads the executable files corresponding to the processes of one or more application programs into the memory 802 according to the following instructions, and the processor 801 runs the application programs stored in the memory 802 to realize various functions, such as: Obtain the current outside temperature data; When the current external temperature data is less than or equal to the first temperature threshold, the target parameters are obtained by matching based on the current external temperature data. The target parameters include at least one of the target compressor frequency, target external fan speed, target fan-stopped condenser tube temperature, and target fan-on condenser tube temperature. The target components controlling the air conditioner operate based on target parameters; the target components include at least one of a compressor and an outdoor fan.

[0074] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0075] Therefore, embodiments of this application provide a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), a magnetic disk, or an optical disk, etc. A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in any of the cryogenic refrigeration control methods provided in embodiments of this application. For example, the computer program loaded by the processor can execute the following steps: Obtain the current outside temperature data; When the current external temperature data is less than or equal to the first temperature threshold, the target parameters are obtained by matching based on the current external temperature data. The target parameters include at least one of the target compressor frequency, target external fan speed, target fan-stopped condenser tube temperature, and target fan-on condenser tube temperature. The target components controlling the air conditioner operate based on target parameters; the target components include at least one of a compressor and an outdoor fan.

[0076] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the detailed descriptions of other embodiments above, which will not be repeated here.

[0077] In practice, each of the above units or structures can be implemented as an independent entity or can be arbitrarily combined to be implemented as the same or several entities. For the specific implementation of each of the above units or structures, please refer to the previous method embodiments, which will not be repeated here.

[0078] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0079] The above provides a detailed description of a low-temperature refrigeration control method, apparatus, air conditioner, and 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 low-temperature refrigeration control method, characterized in that, The low-temperature refrigeration control method includes: Obtain the current outside temperature data; When the current external temperature data is less than or equal to the first temperature threshold, a target parameter is obtained by matching based on the current external temperature data; the target parameter includes at least one of the target compressor frequency, target external fan speed, target fan-stopped condenser tube temperature, and target fan-on condenser tube temperature. The target component controlling the air conditioner operates based on the target parameters; the target component includes at least one of a compressor and an outdoor fan.

2. The low-temperature refrigeration control method according to claim 1, characterized in that, The process of matching based on the current external temperature data to obtain the target parameters includes: The target compressor frequency is obtained by matching the current external temperature data, the first preset external temperature, the first compressor frequency, the second preset external temperature, and the second compressor frequency; both the first preset external temperature and the second preset external temperature are greater than the second temperature threshold and less than or equal to the first temperature threshold; and / or, The target external fan speed is obtained by matching the current external temperature data and the speed of the first external fan; and / or, Based on the current external temperature data and the first condenser tube temperature, the target fan-stopped condenser tube temperature is obtained; and / or, The target fan-activated condenser tube temperature is obtained by matching the current external temperature data with the second condenser tube temperature.

3. The low-temperature refrigeration control method according to claim 2, characterized in that, The process of matching the current external temperature data, the first preset external temperature, the first compressor frequency, the second preset external temperature, and the second compressor frequency to obtain the target compressor frequency includes: When the second temperature threshold < the current external temperature data ≤ the first temperature threshold, the first compressor frequency is subtracted from the second compressor frequency to obtain a first difference, the second preset external temperature is subtracted from the first preset external temperature to obtain a second difference, the current external temperature data is subtracted from the first preset external temperature to obtain a third difference, the first difference is divided by the second difference to obtain a first quotient, the first quotient is multiplied by the third difference to obtain a first product, and the first compressor frequency is subtracted from the first product to obtain the target compressor frequency; When the third temperature threshold < the current external temperature data ≤ the second temperature threshold, the first compressor frequency and the first product are added to obtain the target compressor frequency; When the fourth temperature threshold < the current external temperature data ≤ the third temperature threshold, the first compressor frequency and the first product are added to obtain the target compressor frequency; When the fifth temperature threshold < the current external temperature data ≤ the fourth temperature threshold, the first compressor frequency and the first product are added to obtain the first sum, and the first sum is multiplied by the first frequency coefficient to obtain the target compressor frequency; When the current external temperature data is less than or equal to the fifth temperature threshold, the first compressor frequency and the first product are added together to obtain a first sum, and the first sum is multiplied by the first frequency coefficient to obtain the target compressor frequency.

4. The low-temperature refrigeration control method according to claim 2, characterized in that, The process of matching the current external temperature data with the rotational speed of the first external fan to obtain the target external fan rotational speed includes: When the second temperature threshold < the current external temperature data ≤ the first temperature threshold, the target external fan speed is determined to be the first external fan speed; When the third temperature threshold < the current external temperature data ≤ the second temperature threshold, the first external fan speed is multiplied by the first speed coefficient to obtain the target external fan speed; When the fourth temperature threshold < the current external temperature data ≤ the third temperature threshold, the first external fan speed is multiplied by the second speed coefficient to obtain the target external fan speed; When the fifth temperature threshold < the current external temperature data ≤ the fourth temperature threshold, the first external fan speed is multiplied by the third speed coefficient to obtain the target external fan speed; When the current external temperature data is less than or equal to the fifth temperature threshold, the first external fan speed is multiplied by the fourth speed coefficient to obtain the target external fan speed. Wherein, the fourth speed coefficient < the third speed coefficient < the second speed coefficient < the first speed coefficient.

5. The low-temperature refrigeration control method according to claim 2, characterized in that, The process of matching the current external temperature data with the first condenser tube temperature to obtain the target fan-stopped condenser tube temperature includes: When the second temperature threshold < the current external temperature data ≤ the first temperature threshold, the target fan stop condenser tube temperature is determined to be the first condenser tube temperature; When the third temperature threshold is less than the current external temperature data and less than the second temperature threshold, the first condenser tube temperature and the first tube temperature parameter are added together to obtain the target fan stop condenser tube temperature. When the fourth temperature threshold < the current external temperature data ≤ the third temperature threshold, the first condenser tube temperature and the second tube temperature parameter are added together to obtain the target fan stop condenser tube temperature. When the fifth temperature threshold < the current external temperature data ≤ the fourth temperature threshold, the first condenser tube temperature and the third tube temperature parameter are added together to obtain the target fan stop condenser tube temperature. When the current external temperature data is less than or equal to the fifth temperature threshold, the first condenser tube temperature and the fourth tube temperature parameter are added together to obtain the target fan stop condenser tube temperature. Wherein, the first pipe temperature parameter < the second pipe temperature parameter < the third pipe temperature parameter < the fourth pipe temperature parameter.

6. The low-temperature refrigeration control method according to claim 2, characterized in that, The process of matching the current external temperature data with the second condenser tube temperature to obtain the target fan-activated condenser tube temperature includes: When the second temperature threshold is less than the current external temperature data and less than the first temperature threshold, the target fan condenser tube temperature is determined to be the second condenser tube temperature. When the third temperature threshold < the current external temperature data ≤ the second temperature threshold, the second condenser tube temperature is subtracted from the fifth tube temperature parameter to obtain the target fan-activated condenser tube temperature; When the fourth temperature threshold is less than the current external temperature data and less than the third temperature threshold, the second condenser tube temperature and the sixth tube temperature parameter are subtracted to obtain the target fan-start condenser tube temperature. When the fifth temperature threshold is less than the current external temperature data and less than the fourth temperature threshold, the second condenser tube temperature and the seventh tube temperature parameter are subtracted to obtain the target fan-start condenser tube temperature. When the current external temperature data is less than or equal to the fifth temperature threshold, the second condenser tube temperature is subtracted from the eighth tube temperature parameter to obtain the target fan-activated condenser tube temperature. Wherein, the fifth tube temperature parameter < the sixth tube temperature parameter < the seventh tube temperature parameter < the eighth tube temperature parameter.

7. The low-temperature refrigeration control method according to claim 1, characterized in that, The target parameters include the target outdoor fan speed, the target condenser tube temperature when the fan is off, and the target condenser tube temperature when the fan is on. The target component controlling the air conditioner operates based on the target parameters, including: Get the current condenser tube temperature; When the current condenser tube temperature is greater than the target fan stop condenser tube temperature, the external fan is controlled to operate based on the target external fan speed. When the current condenser tube temperature is less than or equal to the target fan stop condenser tube temperature, the external fan is controlled to pause operation and return to the step of obtaining the current condenser tube temperature until the current condenser tube temperature is greater than the target fan stop condenser tube temperature, at which point the external fan is controlled to operate based on the target external fan speed.

8. A low-temperature refrigeration control device, characterized in that, The cryogenic refrigeration control device includes: The external temperature acquisition module is used to acquire the current external temperature data; The parameter matching module is used to match the current external temperature data to obtain target parameters when the current external temperature data is less than or equal to a first temperature threshold. The target parameters include at least one of the following: target compressor frequency, target external fan speed, target fan-stopped condenser tube temperature, and target fan-on condenser tube temperature. An air conditioning control module is used to control the target components of the air conditioner to operate based on the target parameters; the target components include at least one of a compressor and an outdoor fan.

9. An air conditioner, characterized in that, The air conditioner includes: one or more processors, a memory, and one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the low-temperature refrigeration control method according to any one of claims 1 to 7.

10. 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 cryogenic refrigeration control method according to any one of claims 1 to 7.

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