Air conditioner anti-freezing control method and device, air conditioner and computer readable medium

Abstract

The invention relates to an air conditioner anti-freezing control method and device, an air conditioner and a computer readable medium. The method comprises the steps of judging whether anti-freezing pre-protection is triggered or not according to indoor and outdoor environment temperature difference; if yes, the optimal running temperature of the unit pipeline is determined according to the downtime of the compressor, a second environment state parameter is obtained, and parameter running is updated; if the anti-freezing pre-protection is not triggered or the optimal operation temperature of the unit pipeline in the anti-freezing pre-protection does not meet the temperature boundary, whether system adjustment protection is started or not is judged based on the current temperature of a pipeline temperature sensing bulb; and a second temperature difference between the current temperature of the pipeline temperature sensing bulb and the optimal operation temperature of the unit pipeline is continuously monitored based on system adjustment protection, and whether anti-freezing protection is started or not is judged according to the second temperature difference and the continuous operation time of the compressor. According to the method, frequent starting and stopping of the unit can be reduced, the reliability and stability of the air conditioning system are improved, and the problems that in the prior art, freezing risks under complex working conditions cannot be handled, anti-freezing protection is unreliable and the effect is poor are solved.

Description

Technical Field

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

[0002] An air conditioner usually adopts a refrigeration mode to lower the indoor temperature in summer and a heating mode to raise the indoor temperature in winter. Currently, the anti-freezing control of an air conditioner mainly relies on a temperature sensor to trigger a protection mechanism. Taking the refrigeration or dehumidification mode as an example, after the system runs for a period of time, by detecting the pipe temperature of the indoor heat exchanger, when the temperature continuously drops below a preset threshold (such as 2°C), the compressor stops and the fan starts to dissipate heat to prevent the evaporator from icing. In the prior art, when the temperature of the evaporator is detected to be abnormal, the indoor temperature distribution is synchronously monitored, and the air flow circulation is improved by adjusting the air deflector angle and the fan speed to avoid local low temperature; or by calculating the temperature difference between the compressor suction temperature and the refrigerant temperature of the outdoor unit, and combining with a preset difference to judge the icing risk, reducing the dependence on the evaporator pipe temperature sensor.

[0003] However, the prior art has limitations in specific scenarios. For example, in places such as precision equipment workshops with high indoor temperature and low outdoor temperature, the high-pressure system (front side of the throttle valve) of the air conditioner has a pressure drop due to the low ambient temperature, while the low-pressure system (rear side of the throttle valve) has a pressure increase due to the high indoor load, resulting in a decrease in the pressure difference before and after the throttle valve and a reduction in the refrigerant circulation flow rate. After long-term operation, the condensate water on the surface of the evaporator is likely to freeze, covering the temperature sensing element and making it ineffective, and the traditional protection mechanism cannot be triggered, ultimately leading to large-area icing and water leakage of the pipeline. In addition, existing solutions mostly rely on a single sensor signal. When the sensor is covered with ice or fails, the system cannot accurately judge the icing risk, further exacerbating the problem.

[0004] In summary, it is of great significance to explore an air conditioner anti-freezing control method with predictive maintenance and adaptive adjustment directions to provide users with a more efficient and safe usage experience. Summary of the Invention

[0005] The present application provides an air conditioner anti-freezing control method, device, air conditioner and computer-readable medium to solve the problem that the prior art is difficult to cope with the icing risk under complex working conditions due to relying on after-the-fact control, resulting in poor anti-freezing protection effect of the air conditioner system in extreme scenarios.

[0006] According to one aspect of the embodiments of the present application, the present application provides an anti-freezing control method for an air conditioner. The method includes: judging whether to trigger pre-protection against freezing according to the first temperature difference between the indoor environmental temperature and the outdoor environmental temperature; if the pre-protection against freezing is triggered, determining the optimal operating temperature of the unit pipeline according to the shutdown time of the compressor and the first environmental state parameter, and obtaining the second environmental state parameter; performing anti-freezing control on the heat exchanger according to the second environmental state parameter and the first operating time of the compressor; if the optimal operating temperature of the unit pipeline in the pre-protection against freezing does not meet the temperature boundary, judging whether to start system adjustment protection based on the current temperature of the pipeline temperature sensor; continuously monitoring the second temperature difference between the current temperature of the pipeline temperature sensor and the optimal operating temperature of the unit pipeline based on the system adjustment protection, and comprehensively judging whether to start anti-freezing protection according to the second temperature difference and the continuous operating time of the compressor.

[0007] Optionally, the judging whether to trigger pre-protection against freezing according to the first temperature difference between the indoor environmental temperature and the outdoor environmental temperature includes: controlling the air conditioner unit to power on and start, and obtaining the first temperature difference between the current indoor environmental temperature and the outdoor environmental temperature; when the first temperature difference is greater than a preset temperature difference threshold, triggering the pre-protection against freezing.

[0008] Optionally, the triggering the pre-protection against freezing, then determining the optimal operating temperature of the unit pipeline according to the shutdown time of the compressor and the first environmental state parameter, and obtaining the second environmental state parameter includes: when the pre-protection against freezing is triggered, judging whether the shutdown time of the compressor reaches the shutdown time limit or / and whether the first environmental state parameter of the compressor changes according to the startup of the compressor, where the first environmental state parameter includes the target indoor environmental temperature or / and the first environmental humidity; if at least one of the shutdown time of the compressor exceeding the preset shutdown time limit, the change of the target indoor environmental temperature, and the change of the first environmental humidity is satisfied, obtaining the temperature of the pipeline temperature sensor in real time, determining the optimal operating temperature of the unit pipeline according to the temperature of the pipeline temperature sensor, and updating the target indoor environmental temperature or / and the first environmental humidity, and obtaining the updated target indoor environmental temperature or / and the first environmental humidity as the second environmental state parameter; if the shutdown time of the compressor does not exceed the preset shutdown time limit or / and the first environmental state parameter does not change, obtaining the first environmental state parameter as the second environmental state parameter.

[0009] Optionally, the real-time acquisition of the temperature of the pipeline temperature sensor and the determination of the optimal operating temperature of the unit pipeline according to the temperature of the pipeline temperature sensor include: real-time acquisition of the temperature of the pipeline temperature sensor, and when the temperature of the pipeline temperature sensor no longer decreases within a preset period, recording the first temperature value of the current pipeline temperature sensor; when the target indoor environmental temperature reaches the set target temperature, recording the second temperature value of the current pipeline temperature sensor; determining the temperature boundary of the optimal operating temperature of the unit pipeline according to the first temperature value and the second temperature value, and taking the maximum value in the temperature boundary as the optimal operating temperature of the unit pipeline.

[0010] Optionally, the anti-freezing control of the heat exchanger according to the second environmental state parameter and the first operating time of the compressor includes: determining the first operating time of the compressor according to the optimal operating temperature of the unit pipeline; performing system tasks according to the second environmental state parameter and the first operating time of the compressor to perform anti-freezing control on the heat exchanger.

[0011] Optionally, if the optimal operating temperature of the unit pipeline does not meet the temperature boundary in the pre-protection against freezing, it is determined whether to start the system adjustment protection based on the current temperature of the pipeline temperature sensor, including: when the optimal operating temperature of the unit pipeline obtained in the pre-protection against freezing does not meet the temperature boundary, obtaining the third temperature value of the pipeline temperature sensor corresponding to when the compressor runs to half of the first operating time, and taking the third temperature as the current temperature of the compressor; if the third temperature value is less than the optimal operating temperature of the unit pipeline, starting the system adjustment protection, and the system adjustment protection includes at least one of increasing the speed of the internal fan, adjusting the frequency of the compressor, and reducing the speed of the external fan.

[0012] Optionally, based on the system adjustment protection, continuously monitor the second temperature difference between the current temperature of the pipeline temperature sensor and the optimal operating temperature of the unit pipeline, and comprehensively judge whether to start the anti-freezing protection according to the second temperature difference and the continuous operating time of the compressor, including: according to the dynamic configuration of increasing the speed of the internal fan, adjusting the frequency of the compressor or reducing the speed of the external fan, periodically monitor the operating states of the internal fan and the compressor, and when the speed of the internal fan, the speed of the external fan or the frequency of the compressor is adjusted to the maximum set threshold, obtain the fourth temperature value of the current pipeline temperature sensor, calculate the difference between the fourth temperature value and the optimal operating temperature of the unit pipeline, and take the difference as the second temperature difference between the pipeline temperature sensor and the unit pipeline; if the second temperature difference meets the temperature difference condition, and / or the continuous operating time of the compressor is greater than the set time threshold, start the anti-freezing protection.

[0013] According to another aspect of the embodiments of the present application, the present application provides an air conditioner anti-freezing control device, which includes: a pre-protection analysis module for judging whether to trigger pre-freezing protection according to the first temperature difference between the indoor environmental temperature and the outdoor environmental temperature; a pre-protection start module for determining the optimal operating temperature of the unit pipeline according to the shutdown time of the compressor and the first environmental state parameter, and obtaining the second environmental state parameter; a pre-protection control module for performing anti-freezing control on the heat exchanger according to the second environmental state parameter and the first operating time of the compressor; a pre-protection monitoring module for judging whether to start system adjustment protection based on the current temperature of the pipeline temperature sensor when the optimal operating temperature of the unit pipeline does not meet the temperature boundary in the pre-freezing protection; an anti-freezing control module for continuously monitoring the second temperature difference between the current temperature of the pipeline temperature sensor and the optimal operating temperature of the unit pipeline during the system adjustment protection, and comprehensively judging whether to start anti-freezing protection according to the second temperature difference and the continuous operating time of the compressor.

[0014] According to another aspect of the embodiments of the present application, the present application provides an air conditioner, which includes a memory, a processor, a communication interface and a communication bus. A computer program that can run on the processor is stored in the memory. The memory and the processor communicate through the communication bus and the communication interface. When the processor executes the computer program, the steps of the above-mentioned air conditioner anti-freezing control method are implemented.

[0015] According to another aspect of the embodiments of the present application, the present application provides a computer-readable medium having non-volatile program code executable by a processor, and the program code causes the processor to execute the steps of the above-mentioned air conditioner anti-freezing control method.

[0016] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the related technologies:

[0017] By monitoring the temperature difference between the indoor environment temperature and the outdoor environment temperature, this application can predict in advance whether the air-conditioning system is in a working condition prone to icing, so as to take pre-protection measures against freezing in a timely manner, so that the protection mechanism can be triggered before the air-conditioning system may have an icing problem. This way of early intervention can avoid too low surface temperature of the heat exchanger, prevent the occurrence of icing, and ensure the normal operation of the air-conditioning system; after entering the pre-protection against freezing, by monitoring the first running time of the compressor and the indoor environment humidity when the indoor environment temperature reaches the target value, the air-conditioning system can adjust the running state more accurately, ensure that the air-conditioning can maintain a high running efficiency under different environmental conditions, and reduce energy consumption; in particular, by monitoring the running time and environmental humidity parameters under the optimal running temperature state of the unit pipeline, the running parameters of the air-conditioning can be adjusted with reference to the optimal running temperature of the unit pipeline, avoid icing of the heat exchanger caused by long-term operation of the compressor or changes in the environmental temperature, and ensure the normal operation of the air-conditioning system. By judging whether to start the system regulation and protection based on the current temperature of the pipeline temperature sensor, it can further judge whether there is an icing risk in the air-conditioning, and take system regulation and protection when the risk appears, and can try to make the air-conditioning system return to the normal operation state, avoiding directly starting the anti-freezing protection and affecting the user's usage requirements and experience; after starting the system regulation and protection, continuously monitor the temperature difference between the current temperature of the pipeline temperature sensor and the optimal running temperature of the unit pipeline, ensure that the change of the system state can be detected in time, so as to further adjust the parameters according to the actual situation, make the air-conditioning system always in a controllable state, and start the anti-freezing protection when necessary to ensure the stability, reliability and safety of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings here are incorporated into the description and form a part of this description, showing embodiments consistent with this application, and are used together with the description to explain the principles of this application.

[0019] In order to more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 FIG. [X] is a schematic flow chart of an optional air-conditioning anti-freezing control method provided according to an embodiment of this application;

[0021] Figure 2 FIG. [Y] is a schematic flow chart of an optional air-conditioning pre-protection against freezing method provided according to an embodiment of this application;

[0022] Figure 3 FIG. [Z] is a schematic flow chart of an optional method for obtaining the optimal running temperature of the unit pipeline provided according to an embodiment of this application;

[0023] Figure 4 Another optional schematic flowchart of the air conditioner anti-freezing control method provided according to an embodiment of the present application;

[0024] Figure 5 An optional structural diagram of the air conditioner anti-freezing control device provided according to an embodiment of the present application;

[0025] Figure 6 An optional schematic structural diagram of an electronic device provided according to an embodiment of the present application. Specific embodiments

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0027] To solve the problems mentioned in the background art, according to one aspect of the embodiments of the present application, embodiments of the air conditioner anti-freezing control method are provided.

[0028] As Figure 1 shown, taking the air conditioner anti-freezing control method being executed by the server as an example, an air conditioner anti-freezing control method includes the following steps:

[0029] Step S102, judging whether to trigger pre-protection against freezing according to the first temperature difference between the indoor environmental temperature and the outdoor environmental temperature.

[0030] In this embodiment, the provided air conditioner anti-freezing control method is applicable to the air conditioner refrigeration or heating scenarios in extreme environments. During the air conditioner anti-freezing control process, the control system of the air conditioner unit can monitor various data involved in the whole process in real time, including processes such as real-time data reading, judgment, and control.

[0031] Among them, the above-mentioned anti-freezing protection data may include data related to starting the anti-freezing protection of the unit, including but not limited to the water temperature of the current unit, evaporation temperature, system refrigerant condition, connection pipeline condition, environmental temperature of the unit, environmental humidity, etc.

[0032] In this embodiment, by comparing the differences in indoor and outdoor environmental temperatures, potential risks of freezing of the air-conditioning heat exchanger are identified in advance. Since the indoor-outdoor temperature difference can reflect the operating conditions of the air conditioner to a certain extent, when the temperature difference reaches specific conditions, it means that the air-conditioning system may face the risk of freezing. At this time, triggering the pre-protection against freezing can take measures in advance to avoid the problem from deteriorating. Early monitoring of the operating state of the air conditioner is achieved, and the corresponding protection mechanism is activated before the freezing problem actually occurs, which helps to prevent the heat exchanger from freezing, improve the stability and reliability of the air-conditioning system, and reduce equipment damage and maintenance costs caused by freezing.

[0033] Step S104, if the pre-protection against freezing is triggered, determine the optimal operating temperature of the unit pipeline according to the shutdown time of the compressor and the first environmental state parameter, and obtain the second environmental state parameter.

[0034] In some embodiments, when the difference between the indoor environmental temperature and the outdoor environmental temperature reaches the condition for triggering the pre-protection against freezing, the pre-protection against freezing is entered. Further check whether the last shutdown time of the compressor is greater than the shutdown time limit, or whether the target indoor environmental temperature and the first environmental humidity have changed. If one of the conditions is met, that is, if the shutdown time of the compressor is greater than or equal to the shutdown time limit or / and the target indoor environmental temperature or / and the first environmental humidity has changed, record the target indoor environmental temperature or / and the first environmental humidity again, and use the updated target indoor environmental temperature or / and the first environmental humidity as the second environmental state parameter for acquisition.

[0035] In other embodiments, during the operation of the compressor, the temperature of the pipeline temperature sensor is obtained in real time to determine the optimal operating temperature of the unit pipeline according to the pipeline temperature sensor, and then the operating time of the compressor is updated.

[0036] Furthermore, if none of the conditions are met, the environmental humidity and the optimal operating temperature of the unit pipeline are not updated, and the operating time of the compressor is not updated when the optimal operating temperature of the unit pipeline is reached. The operation of the air-conditioning system continues to use the previously recorded values.

[0037] Furthermore, the above environmental parameters can be collected by sensors. The sensors transmit the collected parameter information to the control system of the air conditioner in the form of electrical signals, etc. The control system analyzes and processes these data, and then adjusts the operating mode, wind speed, compressor frequency, etc. of the air conditioner according to the preset algorithms and logics to achieve precise adjustment of the indoor environment and safe and stable operation of the system.

[0038] In this embodiment, if the shutdown time of the compressor is not long and the set temperature or humidity has not changed, it indicates that the system operating environment is relatively stable. The parameters such as the environmental humidity, the optimal operating temperature of the pipeline, and the corresponding compressor operating time determined previously still have reference value and do not need to be updated. They can be continued to be used to avoid affecting the system operating stability due to frequent parameter adjustments. When the judgment conditions are met, updating the parameters can enable the system to adapt to new changes, ensure the effectiveness of anti-freezing control, and thus improve the system operating efficiency.

[0039] Step S106: Perform anti-freezing control on the heat exchanger according to the second environmental state parameter and the first operating time of the compressor.

[0040] In some embodiments, the second environmental state parameter can reflect the actual environmental conditions of the air conditioner operation. For example, when the outdoor temperature is low and the humidity is high, the surface of the heat exchanger is more likely to frost and freeze. By obtaining these parameters, the system can quantitatively evaluate the impact of the environment. The first operating time of the compressor reflects the operating duration and working state of the air conditioner system. After a long time of operation, parameters such as the temperature and pressure of the compressor and the heat exchanger will change. For example, too long operating time may cause the temperature of the heat exchanger to be too low, increasing the risk of freezing.

[0041] In some embodiments, by integrating the second environmental state parameter and the first operating time of the compressor, the system will adjust a series of operating tasks. For example, when the environmental temperature is low and the compressor operating time is long, the system may appropriately increase the operating frequency of the compressor to increase the circulation speed of the refrigerant and enhance the heat exchange of the heat exchanger; or adjust the rotational speed of the fan to change the air flow speed and optimize the heat dissipation effect of the heat exchanger. It may also adjust the opening degree of the throttling device to control the refrigerant flow rate and keep the temperature of the heat exchanger within a safe range.

[0042] In this embodiment, by combining the second environmental state parameter and the first operating time of the compressor, precise control of various tasks of the air conditioner system is carried out to ensure that the temperature of the heat exchanger is always within a safe range, which can effectively avoid the freezing of the heat exchanger, ensure the normal operation of the air conditioner system. At the same time, by controlling according to the actual environment and operating time, the energy consumption can also be optimized and the energy-saving performance of the air conditioner can be improved.

[0043] Step S108: If the optimal operating temperature of the unit pipeline in the anti-freezing pre-protection does not meet the temperature boundary, determine whether to start the system adjustment and protection based on the current temperature of the pipeline temperature sensor.

[0044] In some embodiments, when the optimal operating temperature set by the pre-protection fails to meet the requirements, the temperature of the unit pipeline is monitored in real time through the pipeline temperature sensor. When the pipeline temperature reaches certain conditions, the system adjustment protection measures are activated, providing an additional protection mechanism for the air-conditioning system and further enhancing the reliability of anti-freezing.

[0045] In other embodiments, when the anti-freezing pre-protection is not triggered, the temperature of the unit pipeline is monitored in real time through the pipeline temperature sensor. When the pipeline temperature reaches certain conditions, the system adjustment protection measures are activated, providing an additional protection mechanism for the air-conditioning system and further enhancing the reliability of anti-freezing.

[0046] Specifically, if the current temperature of the pipeline temperature sensor is lower than the set threshold, it indicates that there is a risk of pipeline freezing. At this time, the system will activate the system adjustment protection measures. The system adjustment may include reducing the operating power of the compressor, adjusting the rotation direction or wind speed of the fan, etc., to reduce the heat dissipation of the heat exchanger and increase the pipeline temperature.

[0047] Step S110, based on the system adjustment protection, continuously monitor the second temperature difference between the current temperature of the pipeline temperature sensor and the optimal operating temperature of the unit pipeline, and comprehensively judge whether to activate the anti-freezing protection according to the second temperature difference and the continuous operation time of the compressor.

[0048] In this embodiment, the second temperature difference reflects the deviation degree between the current pipeline temperature and the optimal operating temperature, and the continuous operation time of the compressor reflects the operating state of the system. Judging by combining these two factors can more accurately evaluate whether the air-conditioning system is facing a freezing risk, so as to decide whether to activate more stringent anti-freezing protection measures. It realizes the dynamic monitoring and accurate judgment of the operating state of the air-conditioning system, can activate the anti-freezing protection in time when it is really needed, avoid unnecessary protection actions, improve the intelligent level and operating efficiency of the system, and at the same time maximize the safety of the heat exchanger and prevent the occurrence of freezing failures.

[0049] In the embodiments of the present invention, by monitoring the temperature difference between the indoor environment temperature and the outdoor environment temperature, it is possible to predict in advance whether the air conditioning system is in a working condition prone to icing, so as to take pre-protection measures against freezing in a timely manner, so that the protection mechanism can be triggered before the air conditioning system may have an icing problem. This way of intervening in advance can avoid the surface temperature of the heat exchanger being too low and prevent the occurrence of icing, ensuring the normal operation of the air conditioning system; after entering the pre-protection against freezing, by monitoring the first running time of the compressor and the indoor environment humidity when the indoor environment temperature reaches the target value, the air conditioning system can adjust the operating state more accurately, ensuring that the air conditioner can maintain a high operating efficiency under different environmental conditions and reducing energy consumption; in particular, by monitoring the parameters of the running time and the environmental humidity under the optimal operating temperature state of the unit pipeline, the operating parameters of the air conditioner can be adjusted with reference to the optimal operating temperature of the unit pipeline, avoiding icing of the heat exchanger caused by the long-term operation of the compressor or the change of the environmental temperature, and ensuring the normal operation of the air conditioning system. By judging whether to start the system adjustment protection based on the current temperature of the pipeline temperature sensor, it is possible to further judge whether there is an icing risk in the air conditioner, and take system adjustment protection when the risk appears, and try to make the air conditioning system return to the normal operating state, avoiding directly starting the anti-freezing protection and affecting the user's usage requirements and experience; after starting the system adjustment protection, continuously monitor the temperature difference between the current temperature of the pipeline temperature sensor and the optimal operating temperature of the unit pipeline, ensure that the change of the system state can be detected in time, so as to further adjust the parameters according to the actual situation, make the air conditioning system always in a controllable state, and start the anti-freezing protection when necessary to ensure the stability, reliability and safety of the air conditioning system.

[0050] In an alternative embodiment, step S102 specifically includes:

[0051] Control the air conditioning unit to power on and start up, and obtain the first temperature difference between the current indoor environment temperature and the outdoor environment temperature;

[0052] When the first temperature difference is greater than a preset temperature difference threshold, trigger the pre-protection against freezing.

[0053] In some embodiments, after the air conditioning unit is powered on and started up, the first temperature difference between the current indoor environment temperature Tn and the outdoor environment temperature Tw is obtained. The first temperature difference is expressed as Tn > Tw + 5. When Tn > Tw + 5, enter the pre-protection against freezing.

[0054] It can be understood that different indoor-outdoor temperature differences reflect different environmental conditions. Taking the temperature difference as the judgment basis, the air-conditioning system can adjust its operating strategy according to the actual environmental conditions. For example, in summer when it is hot, the indoor-outdoor temperature difference is large, the operating load of the air conditioner is high, and the risk of icing is more likely to occur. At this time, the pre-protection mechanism can be started in time to ensure the stable operation of the system; while in spring and autumn when the temperature difference is small, the protection mechanism will not be easily triggered, avoiding unnecessary adjustments and enabling the air-conditioning system to more flexibly adapt to various environmental temperature changes.

[0055] In this embodiment, judging whether to enter the pre-protection according to the temperature difference can enable the air-conditioning system to operate more efficiently under different working conditions. When it is detected that the temperature difference is large and there may be a risk of icing, the system can take measures in advance to optimize the refrigeration or heating effect of the system, reduce energy consumption, and at the same time reduce the wear of components caused by frequent adjustments, extending the service life of the air-conditioning system. At the same time, by intervening in the protection in advance, the icing of the air-conditioning system is effectively prevented, avoiding problems such as a decrease in refrigeration effect and frost and water dripping from the air outlet, providing a more stable and comfortable indoor environment for users, thereby enhancing the user's satisfaction and usage experience with the air-conditioning product.

[0056] In an alternative embodiment, as shown in Figure 2 the above step S104 specifically includes:

[0057] Step S1041, when the anti-freezing pre-protection is triggered, judge whether the compressor shutdown time reaches the shutdown time limit or / and whether the first environmental state parameter of the compressor changes according to the start of the compressor, where the first environmental state parameter includes the target indoor environmental temperature and the first environmental humidity;

[0058] Step S1042, if at least one of the conditions that the compressor shutdown time exceeds the preset shutdown time limit, the target indoor environmental temperature changes, and the first environmental humidity changes is satisfied, obtain the temperature of the pipeline temperature sensor in real time, determine the optimal operating temperature of the unit pipeline according to the temperature of the pipeline temperature sensor, and update the target indoor environmental temperature or / and the first environmental humidity, and use the updated target indoor environmental temperature and the first environmental humidity as the second environmental state parameter for acquisition;

[0059] Step S1043, if the compressor shutdown time does not exceed the preset shutdown time limit or / and the first environmental state parameter does not change, use the first environmental state parameter as the second environmental state parameter for acquisition, and the optimal operating temperature of the unit pipeline and the corresponding first operating time of the compressor are not updated.

[0060] In some embodiments, when the first temperature difference between the indoor environmental temperature and the outdoor environmental temperature is greater than 5 degrees, the anti-freezing pre-protection is entered. Check whether the compressor shutdown time Tt is greater than 2 hours or whether the target indoor environmental temperature and the first environmental humidity have changed. If one of the conditions is met, record the environmental humidity H and the optimal operating temperature Tg of the unit pipeline again, and obtain the compressor operating time Tc corresponding to the optimal operating temperature of the unit pipeline.

[0061] In this embodiment, by judging the compressor shutdown time, the operating conditions of the air-conditioning system after a long shutdown or a change in set parameters can be effectively controlled. When the compressor shutdown time is too long, or the set temperature and humidity change, the operating environment and conditions of the air-conditioning system change greatly. Recording the environmental humidity H again, determining the optimal operating temperature Tg of the unit pipeline, and obtaining the compressor operating time Tc at Tg can enable the system to update and adopt more accurate operating parameters according to the new environment and conditions, ensure that the system operates based on the latest and accurate parameters when the conditions change, and further ensure that the subsequent anti-freezing control strategy is accurately executed based on the actual situation, which helps to maintain the operating stability of the air-conditioning system and improves the accuracy of the anti-freezing control.

[0062] In an alternative embodiment, in combination with Figure 3 As shown, the above-mentioned real-time acquisition of the temperature of the pipeline temperature sensing package and determination of the optimal operating temperature of the unit pipeline according to the temperature of the pipeline temperature sensing package specifically includes:

[0063] Step S301: Real-time acquire the temperature of the pipeline temperature sensing package. When the temperature of the pipeline temperature sensing package no longer drops within a preset period, record the first temperature value of the current pipeline temperature sensing package.

[0064] Step S302: When the target indoor environmental temperature reaches the set target temperature, record the second temperature value of the current pipeline temperature sensing package.

[0065] Step S303: Determine the temperature boundary of the optimal operating temperature of the unit pipeline according to the first temperature value and the second temperature value, and use the maximum value in the temperature boundary as the optimal operating temperature of the unit pipeline.

[0066] In some embodiments, in combination with Figure 4As shown in the figure, after entering the pre - freeze protection, when the compressor starts, it first judges the shutdown time Tt before the compressor starts. When Tt is greater than 2 hours, it starts to record the running time of the compressor and obtains the temperature of the pipeline temperature sensor in real time. When the temperature of the pipeline temperature sensor is detected not to drop for 10 consecutive seconds during the compressor operation, record the pipeline temperature sensor at this time as the first temperature value Tg1. When the indoor ambient temperature drops to the set target temperature, obtain the second temperature value Tg2 of the pipeline temperature sensor; thus, the temperature boundary of the optimal operating temperature Tg of the unit pipeline is max(Tg1, Tg2).

[0067] Among them, the temperature boundary is not fixed, but will be dynamically adjusted according to different environmental factors and air - conditioner operation modes; the value of the optimal operating temperature Tg of the unit pipeline can be determined according to ensuring that the unit runs to the set temperature or has reached the maximum operating capacity.

[0068] It should be noted that the value range of the optimal operating temperature Tg of the unit pipeline cannot be less than the anti - freeze protection value.

[0069] In this embodiment, by obtaining the temperature of the pipeline temperature sensor in real time and recording the first temperature value Tg1 when the temperature does not drop for 10 consecutive seconds during the compressor operation, the system heat exchange is close to the stable state at this time, and Tg1 can reflect the relatively stable temperature situation of the pipeline under this working condition. And obtaining the second temperature value Tg2 when the indoor ambient temperature drops to the set target temperature takes into account the temperature performance of the system in the process of meeting the refrigeration target. Based on these two temperature performances, determining the value range of the optimal operating temperature of the unit pipeline, that is, the temperature boundary, can accurately reflect the thermal state of the system from different operating stages. Compared with a single temperature value, considering the temperatures in different stages comprehensively can capture the pipeline temperature change more comprehensively, adapt to the requirements of different operating scenarios, and provide a more practical temperature benchmark for subsequent anti - freeze control.

[0070] In this embodiment, when the actual temperature of the unit is close to or lower than Tg, the icing risk can be judged more accurately, and measures can be taken in advance to avoid the failure or misoperation of the anti - freeze control caused by temperature misjudgment, further ensuring the stable operation of the system under complex working conditions and extending the service life of the equipment.

[0071] In an alternative embodiment, the above - mentioned step S106 specifically includes:

[0072] Determine the first running time of the compressor according to the optimal operating temperature of the unit pipeline;

[0073] Execute system tasks according to the second environmental state parameter and the first running time of the compressor to perform anti - freeze control on the heat exchanger.

[0074] In some embodiments, the optimal operating temperature of the unit pipeline represents the ideal temperature at which the pipeline can effectively avoid freezing and operate efficiently under the current environment and equipment conditions. Determining the first operating time of the compressor based on this temperature can accurately match the operating duration of the compressor with the actual system requirements. For example, when the outdoor temperature is low and the humidity is high, the unit pipeline is more likely to freeze, and the optimal operating temperature needs to be appropriately increased. At this time, the first operating time of the compressor will be correspondingly extended to provide sufficient heat to prevent freezing; conversely, if the environmental conditions are good, the operating time can be shortened to avoid energy waste caused by excessive operation.

[0075] In this embodiment, by updating the first operating time of the compressor based on the updated optimal operating temperature of the unit pipeline, the compressor can operate within an appropriate time, making the operation of the compressor more in line with the current actual requirements of the system, avoiding excessive operation or insufficient operation, thereby optimizing the performance of the entire air-conditioning system and improving the refrigeration or heating efficiency; when the compressor operates according to the updated parameters, it can meet the indoor environment adjustment requirements while avoiding unnecessary energy consumption, achieving energy-saving operation and reducing the user's usage cost; performing the operation task based on the updated environmental parameters and operating time can keep the indoor environment more stably within the comfortable range set by the user, enabling the air-conditioning system to flexibly adjust the operating state according to the real-time updated parameters, better adapting to different environmental conditions and usage scenarios, ensuring stable and reliable operation, and improving the adaptability and versatility of the system.

[0076] In an alternative embodiment, the above step S108 specifically includes:

[0077] When the optimal operating temperature of the unit pipeline obtained in the pre-freezing pre-protection does not meet the temperature boundary, obtain the third temperature value of the pipeline temperature sensing package corresponding to when the compressor runs to half of the first operating time, and use the third temperature as the current temperature of the compressor.

[0078] If the third temperature value is less than the optimal operating temperature of the unit pipeline, start the system adjustment protection, and the system adjustment protection includes at least one of increasing the inner fan speed, adjusting the compressor frequency, and reducing the outer fan speed.

[0079] In some embodiments, after entering the pre-freezing pre-protection, obtain the third temperature value of the pipeline temperature sensing package when the compressor running time reaches half of the updated running time (the first operating time), and judge whether it is necessary to start the system adjustment protection according to the difference between the third temperature value and the updated optimal operating temperature of the unit pipeline, and dynamically adjust the operating parameters to prevent the heat exchanger from icing.

[0080] In some other embodiments, if the difference between the indoor environmental temperature Tn and the outdoor environmental temperature Tw is less than 5, the anti-freezing pre-protection is not entered, and the target environmental temperature, environmental humidity, and compressor operation time are not updated. Instead, the historical set parameters can be directly used. Then, continuously monitor the current temperature of the compressor according to the optimal operating temperature of the unit pipeline. If the current temperature is still lower than the optimal operating temperature of the unit pipeline when the compressor has run for half of the target operating time, the system adjustment protection needs to be started.

[0081] Specifically, when the optimal operating temperature Tg of the unit pipeline does not meet the set temperature boundary, it indicates that the air conditioner has a risk of icing. For example, when the third temperature value Tg’ < 0.8Tg, the system adjustment protection needs to be started, that is, adjust the operating parameters of the air conditioner system, including at least increasing the speed of the internal fan, adjusting the frequency of the compressor, and reducing the speed of the external fan, to prevent the heat exchanger from icing.

[0082] Furthermore, the adjustment of the operating parameters of the air conditioner system includes one of the following actions: increasing the speed of the internal fan Rin by ΔRi r / min, reducing the frequency of the compressor F by ΔF HZ, and reducing the speed of the external fan Ro by ΔRo r / min. At this time, adjusting the speed of the internal fan, the frequency of the compressor, or the speed of the external fan changes the heat exchange and refrigeration capacity of the system, improving the anti-icing ability of the system.

[0083] Among them, Rin is set according to the rated speed (R) of the internal fan and the system safety margin. For example, the initial increment is a fixed value, such as 50 r / min or a percentage of the rated speed, such as 5% R, to ensure that the adjusted speed does not exceed 1.1 times the rated speed, that is, n*ΔR ≤ 1.1R, where ΔR represents the adjustment amount of the rated speed and n is the number of adjustments. The purpose is to prevent the speed of the internal fan from exceeding 110% of the rated value, avoiding motor overload or abnormal noise. ΔF is the compressor power adjustment amount, which is set based on the minimum operating frequency and adjustment accuracy of the compressor. For example, initially reduce by 5 Hz, and the total adjustment amount does not exceed 10 Hz, that is, n*ΔF ≤ 10 Hz, to avoid system oscillation caused by sudden frequency drop, limit the total adjustment range of the compressor frequency, ensure that the compressor operates within the safe operating range, and avoid efficiency decline or mechanical damage caused by excessive frequency adjustment. ΔRo is set according to the speed regulation range and heat dissipation requirements of the external fan. For example, initially reduce the rated speed by 10%, ensuring that the external fan can still maintain the basic heat dissipation ability and avoiding overheating of the external unit due to too low a speed.

[0084] In this embodiment, the temperature of the pipeline temperature sensor is used to determine whether the optimal operating temperature of the unit pipeline meets the conditions, so as to obtain the icing risk in the first time, take protective measures in time, and improve the anti-freezing protection rate of the air conditioner. By adjusting the speed of the internal fan, reducing the compressor frequency, and / or reducing the speed of the external fan, the temperature of the evaporator and the pipeline can be increased, avoiding frosting or icing on the surface due to too low temperature, preventing ice blockage faults and reducing heat exchange efficiency. According to the deviation between the third temperature value of the pipeline detected in real time and the optimal operating temperature, the parameters of each component are dynamically adjusted to find a balance between the anti-freezing requirement and the refrigeration or heating capacity of the system, avoiding performance anomalies caused by excessive adjustment and large temperature fluctuations caused by sudden parameter changes, and ensuring the stability and reliability of the anti-freezing effect.

[0085] In an alternative embodiment, step S110 described above specifically includes:

[0086] According to the dynamic configuration of increasing the speed of the internal fan, adjusting the compressor frequency, or reducing the speed of the external fan, the operating states of the internal fan and the compressor are monitored periodically. When the speed of the internal fan, the speed of the external fan, or the compressor frequency is adjusted to the maximum set threshold, the fourth temperature value of the current pipeline temperature sensor is obtained, the difference between the fourth temperature value and the optimal operating temperature of the unit pipeline is calculated, and the difference is used as the second temperature difference between the pipeline temperature sensor and the unit pipeline.

[0087] If the second temperature difference meets the temperature difference condition, and / or the continuous operation time of the compressor is greater than the set time threshold, the anti-freezing protection is started.

[0088] In some embodiments, after the operating parameters of the air conditioning system are adjusted, it is monitored once every 1 minute to check whether the adjustment of the previous operating parameters is effective according to the pipeline temperature (the fourth temperature value) detected in real time, that is, the second temperature difference between the pipeline and the unit is calculated, and then it is judged whether it is necessary to start the traditional anti-freezing protection and the unit is shut down according to the second temperature difference and the continuous operation time of the compressor. If the second temperature difference still does not meet the temperature difference condition after the system parameters are adjusted, and / or the continuous operation time of the compressor is greater than the set time threshold, it is necessary to start the anti-freezing protection, that is, the unit is shut down.

[0089] Among them, the temperature difference condition includes: when the fourth temperature value is less than the optimal operating temperature of the unit pipeline, the temperature difference condition is that the second temperature difference is less than 0; when the fourth temperature value is greater than or equal to the optimal operating temperature of the unit pipeline, the temperature difference condition is that the second temperature difference is greater than or equal to 0. The temperature difference condition includes 2 sub-conditions. The first sub-condition is: the temperature difference between the fourth temperature difference value and the optimal operating temperature of the unit pipeline ≧ 0, and the second sub-condition is that the temperature difference between the fourth temperature difference value and the optimal operating temperature of the unit pipeline < 0; if the second temperature difference ≧ 0, the first sub-condition is satisfied, and the operating states of the fan and the compressor during the continuous cycle monitoring are continued. If the continuous operating time of the compressor exceeds the set time threshold, the anti-freezing protection is started; if the second temperature difference < 0, the second sub-condition is satisfied, and it is further determined whether the continuous operating time of the compressor is greater than the set time threshold. If the continuous operating time of the compressor is greater than the set time threshold, the anti-freezing protection is started.

[0090] Specifically, during the pre-adjustment, when the rotational speed of the internal fan, the frequency of the compressor, etc. have reached the hardware limit of the equipment, such as the maximum rotational speed of the internal fan or the minimum frequency of the compressor, and the pipeline temperature still cannot be increased through parameter adjustment, it is judged whether to start the shutdown protection by monitoring the fourth temperature value, forming a multi-level protection closed loop of "adjustment → limit → shutdown" to avoid damage to the evaporator / pipeline caused by the exhaustion of the adjustment ability. When "the parameters are adjusted to the limit" and "the temperature still does not meet the standard", the shutdown is triggered to avoid misjudging the shutdown due to a single condition, ensuring the necessity and accuracy of the protection action, and reducing the impact of unnecessary shutdowns on the user experience.

[0091] In some examples, the shutdown protection is used as a last resort and is only started when "all adjustment means fail" to avoid room temperature fluctuations caused by frequent shutdowns, such as frequent defrosting during heating. At the same time, after the shutdown, the fault code can be reported in a linked manner, such as displaying "anti-freezing protection", to guide the user to repair and reduce meaningless manual intervention.

[0092] In this embodiment, through the temperature verification under the dynamic parameter adjustment to the limit parameters and then to the shutdown protection, a multi-level protection system is formed. When the pre-adjustment fails, the risk is avoided from getting out of control through rigid shutdown, improving the system robustness and extending the equipment life. The shutdown is triggered by the dual conditions of "limit parameters + temperature verification" instead of a single temperature threshold, which can distinguish "normal operating temperature fluctuations" from "systematic anti-freezing failure", reduce the false alarm rate, and ensure safe shutdown under extreme scenarios beyond the design working conditions.

[0093] In some examples, in combination with Figure 4As shown, under the pre - freeze protection, it is judged whether the continuous operation time Tc' of the compressor is greater than or equal to Tc / 2. If not, the compressor continues to operate until the operation time reaches this condition, and then enters the next step. It is judged whether the continuous operation time Tc' of the compressor is greater than 1 hour. If Tc' < 1 hour, it is further judged whether the current pipeline temperature Tg' (the third temperature value) is less than 0.8*Tg. If it is less, it indicates a risk of icing, and adjustment operations are performed. If Tc' > 1 hour, the anti - freeze protection is started and the unit shuts down.

[0094] Furthermore, the above - mentioned adjustment operations at least include one of the following actions: increasing the speed of the internal fan: Rin = Rin - 1+ΔRi, decreasing the compressor frequency: Fn = Fn - 1 - ΔF, decreasing the speed of the external fan: Ron = Ron - 1 - ΔRo. After the adjustment, continue to monitor whether the pipeline temperature (the fourth temperature value) is less than Tg. If it is not less, it means the adjustment is effective, and continue to monitor and judge whether it is less than 0.8*Tg. If the fourth temperature value is less than Tg, the anti - freeze protection is started and the unit shuts down.

[0095] In this embodiment, when the compressor operation time reaches Tc / 2, judge the relationship with 0.8*Tg, identify potential icing risks in advance and actively intervene. By adjusting the fan speed or compressor frequency, optimize the heat distribution and refrigerant circulation in the system, reduce the probability of icing, and ensure the stable operation of the air - conditioning system under icing - prone conditions. The adjustment limit conditions ensure that the adjustment process is within a reasonable range and avoid adverse effects on the system caused by over - adjustment. By setting "after the internal fan speed or compressor frequency is adjusted to the limit" or "the continuous operation time Tc of the compressor > 1H" as the final condition for starting the anti - freeze protection, it is used as the last safeguard measure to trigger the protection when the pre - adjustment means cannot effectively control the icing risk or the operation time is too long to accumulate risks, ensuring that when the pre - adjustment fails or the risk accumulates to a certain extent, the anti - freeze protection is started in time, avoiding more serious damage to the air - conditioning system caused by icing, extending the service life of the equipment, and at the same time reducing the maintenance cost and the impact on user use caused by equipment failures.

[0096] According to another aspect of the embodiments of the present application, as Figure 5 shown, corresponding to the air - conditioner anti - freeze control method in the above - mentioned embodiments, this embodiment provides an air - conditioner anti - freeze control device, and the device includes:

[0097] A pre - protection analysis module 501, configured to judge whether to trigger the pre - freeze protection according to the first temperature difference between the indoor environmental temperature and the outdoor environmental temperature;

[0098] A pre - protection start module 503, configured to determine the optimal operating temperature of the unit pipeline according to the shutdown time of the compressor and the first environmental state parameter, and obtain the second environmental state parameter;

[0099] The pre - protection control module 505 is used to perform anti - freezing control on the heat exchanger according to the second environmental state parameter and the first running time of the compressor;

[0100] The pre - protection monitoring module 507 is used to determine whether to start the system regulation protection based on the current temperature of the pipeline temperature sensor when the optimal operating temperature of the unit pipeline does not meet the temperature boundary in the anti - freezing pre - protection;

[0101] The anti - freezing control module 509 is used to continuously monitor the second temperature difference between the current temperature of the pipeline temperature sensor and the optimal operating temperature of the unit pipeline based on the system regulation protection, and comprehensively determine whether to start the anti - freezing protection according to the second temperature difference and the continuous running time of the compressor.

[0102] It should be noted that in this embodiment, the pre - protection analysis module 501 can be used to execute step S102 in the embodiment of the present application, the pre - protection start module 503 in this embodiment can be used to execute step S104 in the embodiment of the present application, the pre - protection control module 505 in this embodiment can be used to execute step S106 in the embodiment of the present application, the pre - protection monitoring module 507 in this embodiment can be used to execute step S108 in the embodiment of the present application, and the anti - freezing control module 509 in this embodiment can be used to execute step S110 in the embodiment of the present application.

[0103] It should be noted here that the examples and application scenarios realized by the above - mentioned modules and the corresponding steps are the same, but are not limited to the content disclosed in the above - mentioned embodiments. As a part of the device, the above - mentioned modules can be implemented by software or by hardware.

[0104] It should be noted here that the suffixes such as modules, components, units, sub - modules, and sub - units used to represent elements in the above - mentioned device are only for the convenience of the description of the present application, and they have no specific meaning in themselves. Therefore, they can be used in a mixed way.

[0105] According to another aspect of the embodiment of the present application, the present application provides an air conditioner, as Figure 6 shown, including a memory 601, a processor 603, a communication interface 605, and a communication bus 607. A computer program that can run on the processor 603 is stored in the memory 601. The memory 601 and the processor 603 communicate through the communication interface 605 and the communication bus 607. When the processor 603 executes the computer program, the steps of the above - mentioned air - conditioner anti - freezing control method are realized.

[0106] In the above-mentioned electronic device, the memory and the processor communicate through a communication bus and a communication interface. The communication bus can be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. This communication bus can be divided into an address bus, a data bus, a control bus, etc.

[0107] The memory can include a Random Access Memory (RAM), or can also include a non-volatile memory, such as at least one disk memory. Optionally, the memory can also be at least one storage device located far from the aforementioned processor.

[0108] The above-mentioned processor can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0109] According to another aspect of the embodiments of the present application, there is also provided a computer program product or a computer program. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the steps of the air conditioner anti-freezing control method in any of the above embodiments.

[0110] Optionally, in the embodiments of the present application, the computer-readable medium is set to store program codes for the processor to execute the steps of the air conditioner anti-freezing control method described in the above embodiments.

[0111] Optionally, the specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here. And when the embodiments of the present application are specifically implemented, reference can be made to the above respective embodiments, and corresponding technical effects can be achieved.

[0112] It will be appreciated that the embodiments described herein may be implemented using hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the processing unit may be implemented in one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in this application, or any combination thereof.

[0113] For a software implementation, the techniques described herein may be implemented by units that execute the functions described herein. The software code may be stored in a memory and executed by a processor. The memory may be implemented within the processor or externally to the processor.

[0114] Those of ordinary skill in the art will appreciate that the units and algorithm steps of the examples described in connection with the embodiments disclosed herein can be implemented using electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0115] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above may refer to the corresponding processes in the foregoing method embodiments and will not be described herein again.

[0116] In the embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the couplings or direct couplings or communication connections shown or discussed with each other may be through some interfaces, and the indirect couplings or communication connections of the devices or units may be in electrical, mechanical, or other forms.

[0117] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or may be distributed across multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in each embodiment of the present application, each functional unit may be integrated in a processing unit, may exist separately as individual physical units, or two or more units may be integrated in one unit.

[0118] If the described function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the prior art, or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0119] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without more limitations, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0120] The above description is only the specific implementation manners of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An air conditioner anti-freezing control method, characterized in that: The method comprises: Determining whether to trigger the anti-freezing pre-protection according to a first temperature difference between the indoor ambient temperature and the outdoor ambient temperature; If the anti-freezing pre-protection is triggered, the optimal operating temperature of the unit pipeline is determined according to the downtime of the compressor and the first environmental state parameter, and the second environmental state parameter is obtained; performing anti-freezing control on the heat exchanger according to the second environmental state parameter and the first operating time of the compressor; If the optimal operating temperature of the unit pipeline does not meet the temperature boundary in the anti-freezing pre-protection, whether to start the system adjustment protection is determined based on the current temperature of the pipeline temperature sensing package; Based on the system adjustment protection, the second temperature difference between the current temperature of the pipeline temperature sensing package and the optimal operating temperature of the unit pipeline is continuously monitored, and whether to start the anti-freeze protection is comprehensively determined according to the second temperature difference and the continuous operation time of the compressor.

2. The air conditioner anti-freezing control method according to claim 1, characterized in that: The step of determining whether to trigger the anti-freezing pre-protection according to a first temperature difference between the indoor ambient temperature and the outdoor ambient temperature includes: Control the air conditioning unit to power on and start up, and obtain the first temperature difference between the current indoor ambient temperature and the outdoor ambient temperature; When the first temperature difference is greater than a preset temperature difference threshold, the anti-freezing pre-protection is triggered.

3. The air conditioner anti-freezing control method according to claim 1, characterized in that: If the anti-freezing pre-protection is triggered, the optimal operating temperature of the unit pipeline is determined according to the downtime of the compressor and the first environmental state parameter, and the second environmental state parameter is obtained, including: When the anti-freezing pre-protection is triggered, judging whether the downtime of the compressor reaches the downtime limit or / and whether the first environmental state parameter of the compressor changes according to the start of the compressor, wherein the first environmental state parameter includes the target indoor environmental temperature and / or the first environmental humidity; If at least one of the compressor downtime exceeds the preset downtime limit, the target indoor ambient temperature changes, and the first ambient humidity changes is satisfied, the temperature of the pipeline temperature sensing package is obtained in real time, the optimal operating temperature of the unit pipeline is determined according to the temperature of the pipeline temperature sensing package, and the target indoor ambient temperature and / or the first ambient humidity are updated, and the updated target indoor ambient temperature and / or the first ambient humidity are obtained as the second environmental state parameter; If the compressor downtime does not exceed the preset downtime limit and / or the first environmental state parameter does not change, the first environmental state parameter is obtained as the second environmental state parameter.

4. The air conditioner anti-freezing control method according to claim 3, characterized in that: The real-time acquisition of the temperature of the pipeline temperature sensing package and determination of the optimal operating temperature of the unit pipeline according to the temperature of the pipeline temperature sensing package include: Acquire the temperature of the pipeline temperature sensing package in real time, and when the temperature of the pipeline temperature sensing package no longer decreases within a preset period of time, record the first temperature value of the current pipeline temperature sensing package; When the target indoor ambient temperature reaches the set target temperature, the second temperature value of the current pipeline temperature sensing package is recorded; The temperature boundary of the optimal operating temperature of the pipeline of the unit is determined according to the first temperature value and the second temperature value, and the maximum value of the temperature boundary is used as the optimal operating temperature of the pipeline of the unit.

5. The air conditioner anti-freezing control method according to claim 1, characterized in that: The anti-freezing control of the heat exchanger according to the second environmental state parameter and the first operating time of the compressor includes: Determining a first operating time of the compressor according to an optimal operating temperature of the unit pipeline; A system task is executed according to the second environmental state parameter and the first operating time of the compressor to perform anti-freezing control on the heat exchanger.

6. The air conditioner anti-freezing control method according to claim 3, characterized in that: If the optimal operating temperature of the unit pipeline does not meet the temperature boundary in the anti-freezing pre-protection, judging whether to start the system adjustment protection based on the current temperature of the pipeline temperature sensing package includes: When the optimal operating temperature of the unit pipeline obtained in the anti-freezing pre-protection does not meet the temperature boundary, a third temperature value of the pipeline temperature sensing package corresponding to when the compressor runs to half of the first running time is obtained, and the third temperature is used as the current temperature of the compressor; If the anti-freeze pre-protection is not triggered or the third temperature value is less than the optimal operating temperature of the unit pipeline, the system adjustment protection is started, and the system adjustment protection includes: increasing the speed of the internal fan, adjusting the compressor frequency and reducing at least one of the speed of the external fan.

7. The air conditioner anti-freezing control method according to claim 6, characterized in that: The system-based protection continuously monitors the second temperature difference between the current temperature of the pipeline temperature sensing package and the optimal operating temperature of the unit pipeline, and comprehensively determines whether to start the anti-freezing protection according to the second temperature difference and the continuous operation time of the compressor, including: According to the dynamic configuration of increasing the speed of the inner fan, adjusting the frequency of the compressor or reducing the speed of the outer fan, the operating status of the inner fan and the compressor is periodically monitored, and when the speed of the inner fan, the speed of the outer fan or the frequency of the compressor is adjusted to the maximum set threshold, the fourth temperature value of the current pipeline temperature sensing package is obtained, and the difference between the fourth temperature value and the optimal operating temperature of the unit pipeline is calculated, and the difference is used as the second temperature difference between the pipeline temperature sensing package and the unit pipeline; If the second temperature difference meets the temperature difference condition, or / and the continuous operation time of the compressor is greater than the set time threshold, the anti-freeze protection is started.

8. An air conditioner anti-freezing control device, characterized in that: The device comprises: A pre-protection analysis module, used to determine whether to trigger the anti-freezing pre-protection according to a first temperature difference between the indoor ambient temperature and the outdoor ambient temperature; A pre-protection startup module is used to determine the optimal operating temperature of the unit pipeline according to the downtime of the compressor and the first environmental state parameter, and obtain the second environmental state parameter; a front protection control module, configured to perform anti-freezing control on the heat exchanger according to the second environmental state parameter and the first operating time of the compressor; A pre-protection monitoring module, used to determine whether to start system adjustment protection based on the current temperature of the pipeline temperature sensing package when the optimal operating temperature of the unit pipeline does not meet the temperature boundary in the anti-freezing pre-protection; The anti-freeze control module is used for the system to adjust the protection and continuously monitor the second temperature difference between the current temperature of the pipeline temperature sensing package and the optimal operating temperature of the unit pipeline, and comprehensively judge whether to start the anti-freeze protection based on the second temperature difference and the continuous operation time of the compressor.

9. An air conditioner, comprising a memory, a processor, a communication interface and a communication bus, wherein the memory stores a computer program that can be run on the processor, and the memory and the processor communicate through the communication bus and the communication interface, characterized in that: When the processor executes the computer program, the air conditioner anti-freezing control method described in any one of claims 1 to 6 is implemented.

10. A computer readable medium having a non-volatile program code executable by a processor, characterized in that: The program code enables the processor to execute the air conditioning anti-freezing control method described in any one of claims 1 to 6.

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