Air conditioning unit control method, control system and air conditioning unit

Abstract

The application discloses an air conditioning unit control method, a control system and an air conditioning unit, and relates to the technical field of air conditioning units, in particular to an air conditioning unit control method, a control system and an air conditioning unit. The method comprises the following steps: obtaining a condenser temperature and a condenser fan air volume; determining a heat dissipation state of the air conditioning unit according to the condenser temperature and the condenser fan air volume; and controlling the operation of a condenser fan and a compressor of the air conditioning unit according to the heat dissipation state of the air conditioning unit. The application solves the problem of poor heat dissipation effect caused by the fixed condenser fan rotating speed in the prior art, improves the heat dissipation effect of the air conditioning unit, guarantees the stable operation of the air conditioning unit, and improves the heat exchange effect of the air conditioning unit.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to an air conditioning unit control method, a control system, and an air conditioning unit. Background Technology

[0002] In existing refrigeration systems, the condenser's heat dissipation efficiency directly affects the overall system's operating efficiency and energy consumption. Currently, conventional condenser heat dissipation control schemes typically employ a fixed-speed condenser fan for cooling. This method often fails to achieve optimal heat dissipation under varying operating conditions. Especially when cold storage temperatures fluctuate significantly, condenser operating parameters need frequent adjustments, and the constant temperature changes make a fixed fan speed insufficient for efficient heat dissipation. Therefore, how to dynamically adjust the fan speed according to actual environmental conditions to improve condenser heat dissipation efficiency has become a pressing technical challenge.

[0003] There is currently no effective solution to the problem of poor heat dissipation caused by using a fixed condenser fan speed in related technologies. Summary of the Invention

[0004] This invention provides an air conditioning unit control method, control system, and air conditioning unit, to at least solve the problem of poor heat dissipation effect caused by using a fixed condenser fan speed for condenser heat dissipation in the prior art.

[0005] To address the aforementioned technical problems, according to one aspect of the present invention, an air conditioning unit control method is provided, comprising: acquiring condenser temperature and condenser fan output air volume; determining the heat dissipation state of the air conditioning unit based on the condenser temperature and the condenser fan output air volume; and controlling the operation of the condenser fan and compressor of the air conditioning unit based on the heat dissipation state of the air conditioning unit.

[0006] Furthermore, the heat dissipation state includes at least: good heat dissipation, slightly poor heat dissipation, and severely poor heat dissipation. Determining the heat dissipation state of the air conditioning unit based on the condenser temperature and the condenser fan airflow includes: determining whether the condenser temperature is greater than or equal to the preset temperature threshold and whether the condenser fan airflow is less than or equal to the preset airflow threshold within a preset number of consecutive detection cycles; if so, the heat dissipation state is determined to be severely poor heat dissipation; otherwise, further determining whether the condenser temperature is less than the preset temperature threshold; if the condenser temperature is less than the preset temperature threshold, the heat dissipation state is determined to be good heat dissipation; if the condenser temperature is greater than or equal to the preset temperature threshold, the heat dissipation state is determined to be slightly poor heat dissipation.

[0007] Furthermore, controlling the operation of the condenser fan and compressor of the air conditioning unit according to the heat dissipation status of the air conditioning unit includes: adjusting the operation of the condenser fan to perform energy-saving control when the heat dissipation status of the air conditioning unit is good; adjusting the operation of the condenser fan to perform heat dissipation control when the heat dissipation status of the air conditioning unit is slightly poor; and adjusting the operation of the compressor to perform heat dissipation control when the heat dissipation status of the air conditioning unit is severely poor.

[0008] Furthermore, adjusting the operation of the condenser fan for energy-saving control includes: reducing the operating speed or gear of the condenser fan; adjusting the operation of the condenser fan for heat dissipation control includes: increasing the operating speed or gear of the condenser fan; adjusting the operation of the compressor for heat dissipation control includes: reducing the operating frequency or gear of the compressor.

[0009] Furthermore, after controlling the operation of the condenser fan and compressor of the air conditioning unit according to the heat dissipation status of the air conditioning unit, the method further includes: acquiring the outdoor ambient temperature; predicting the heat dissipation trend of the air conditioning unit based on the outdoor ambient temperature and the air volume of the condenser fan; and controlling the operation of the condenser fan and the compressor according to the heat dissipation trend.

[0010] Furthermore, predicting the heat dissipation trend of the air conditioning unit based on the outdoor ambient temperature and the condenser fan output volume includes: determining whether the outdoor ambient temperature is continuously rising and whether the condenser fan output volume is continuously decreasing; if the outdoor ambient temperature is continuously rising and the condenser fan output volume is continuously decreasing, determining that the heat dissipation trend is a continuous decline in heat dissipation; otherwise, determining that the heat dissipation trend is a stable heat dissipation.

[0011] Furthermore, controlling the operation of the condenser fan and the compressor according to the heat dissipation trend includes: when the heat dissipation trend is that the heat dissipation state continues to decline, increasing the operating speed or gear of the condenser fan and decreasing the operating frequency or gear of the compressor.

[0012] Furthermore, the air conditioning unit is equipped with a wind force sensor and a first temperature sensor. The wind force sensor is used to detect the airflow of the condenser fan, and the first temperature sensor is used to obtain the temperature of the condenser. The method further includes: when the wind force sensor fails, acquiring historical data of the airflow of the condenser fan, determining the historical average airflow of the condenser fan, determining the operating frequency or speed of the compressor corresponding to the historical average airflow of the condenser fan according to a first preset relationship table, and controlling the operation of the compressor according to the operating frequency or speed of the compressor; wherein, the first preset relationship table is the relationship between the airflow of the condenser fan and the airflow of the compressor when there is severe heat dissipation failure. A table showing the correspondence between the compressor's operating frequency or speed setting; when the first temperature sensor malfunctions, historical data of the condenser temperature is acquired, the historical average value of the condenser temperature is determined, and the operating speed or speed setting of the condenser fan corresponding to the historical average value of the condenser temperature is determined according to a second preset relationship table, and the operation of the condenser fan is controlled according to the operating speed or speed setting of the condenser fan; wherein, the second preset relationship table is a table showing the correspondence between the condenser temperature and the operating speed or speed setting of the condenser fan when there is slight heat dissipation insufficiency; when both the wind force sensor and the first temperature sensor are operating normally, the acquisition of the condenser temperature and the condenser fan airflow is triggered.

[0013] Furthermore, before acquiring the condenser temperature and the condenser fan airflow, the method further includes: acquiring the indoor ambient temperature and determining whether the indoor ambient temperature meets the preset requirements; if so, triggering the acquisition of the condenser temperature and the condenser fan airflow; otherwise, controlling the compressor to enter a high-frequency operation mode until the indoor ambient temperature meets the preset requirements, and then triggering the acquisition of the condenser temperature and the condenser fan airflow.

[0014] According to another aspect of the present invention, an air conditioning unit control system is provided, comprising: a first temperature sensor for acquiring condenser temperature; a wind speed sensor for detecting the airflow of a condenser fan; and a main control unit, one end of which is connected to the first temperature sensor and the wind speed sensor, and the other end of which is connected to the condenser fan and the compressor of the air conditioning unit, for determining the heat dissipation state of the air conditioning unit based on the condenser temperature and the airflow of the condenser fan, and controlling the condenser fan and the compressor based on the heat dissipation state of the air conditioning unit.

[0015] According to another aspect of the present invention, an air conditioning unit is provided, including the air conditioning unit control system as described above.

[0016] According to another aspect of the present invention, a storage medium containing computer-executable instructions is provided, which, when executed by a computer processor, are used to perform the air conditioning unit control method as described above.

[0017] This invention provides a control scheme for an air conditioning unit. By acquiring parameters characterizing the condenser's heat dissipation capacity, including condenser temperature and condenser fan output airflow, the heat dissipation state of the air conditioning unit is determined collaboratively based on the condenser temperature and condenser fan output airflow. Then, the operation of the condenser fan and compressor is dynamically adjusted according to the heat dissipation state of the air conditioning unit. By adjusting the condenser fan to accelerate heat dissipation and adjusting the compressor operation to reduce the compressor's heat generation, the air conditioning unit's heat dissipation is adjusted according to the heat dissipation situation under different operating conditions. This avoids the problem of poor heat dissipation caused by a fixed condenser fan speed, improves the heat dissipation effect, and simultaneously avoids excessively high condenser temperatures and poor heat exchange efficiency of the air conditioning unit, improving the stability and heat exchange effect of the air conditioning unit's operation and promptly meeting the user's heat exchange needs. Attached Figure Description

[0018] Figure 1 This is an optional flowchart of an air conditioning unit control method according to an embodiment of the present invention;

[0019] Figure 2 This is another optional flowchart of the air conditioning unit control method according to an embodiment of the present invention;

[0020] Figure 3 This is an optional structural schematic diagram of an air conditioning unit control system according to an embodiment of the present invention;

[0021] Figure 4 This is an optional structural block diagram of an air conditioning unit control system according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Fan blades; 2. Condenser; 3. Variable frequency compressor; 4. Main control unit. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0025] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0026] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0027] It should be understood that although the terms first, second, third, etc., may be used to describe controllers in embodiments of the present invention, these controllers should not be limited to these terms. These terms are only used to distinguish controllers connected to different devices. For example, without departing from the scope of embodiments of the present invention, a first controller may also be referred to as a second controller, and similarly, a second controller may also be referred to as a first controller.

[0028] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0029] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0030] The optional embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0031] Example 1

[0032] In a preferred embodiment 1 of the present invention, an air conditioning unit control method is provided. This control method can be directly applied to various air conditioning units. Specifically, it can be implemented by writing a corresponding program into the air conditioning unit controller.

[0033] Specifically Figure 1 An optional flowchart of the method is shown, such as Figure 1 As shown, the method includes the following steps S102-S106:

[0034] S102: Obtain the condenser temperature and condenser fan airflow; the condenser temperature can be obtained by measuring the condenser surface temperature using a temperature sensor; the condenser fan airflow can be detected by installing a wind force sensor.

[0035] S104: Determine the heat dissipation status of the air conditioning unit based on the condenser temperature and condenser fan airflow. The air conditioning's heat dissipation status is reflected in the condenser temperature and condenser fan airflow. The lower the condenser temperature, the better the heat dissipation effect; conversely, the higher the condenser temperature, the worse the heat dissipation effect. Similarly, the condenser fan airflow also reflects the heat dissipation effect; the smaller the condenser fan airflow, the worse the heat dissipation effect; the larger the condenser fan airflow, the better the heat dissipation effect. Therefore, using condenser temperature and condenser fan airflow can accurately reflect the heat dissipation status of the air conditioning unit, allowing for corresponding adjustments to improve the heat dissipation effect.

[0036] S106: Control the operation of the condenser fan and compressor of the air conditioning unit according to the heat dissipation status of the air conditioning unit.

[0037] In the above embodiments, a control scheme for an air conditioning unit is provided. By acquiring parameters characterizing the heat dissipation capacity of the condenser, including condenser temperature and condenser fan airflow, the heat dissipation state of the air conditioning unit is determined collaboratively based on the condenser temperature and condenser fan airflow. Then, the operation of the condenser fan and compressor is dynamically adjusted according to the heat dissipation state of the air conditioning unit. By adjusting the condenser fan to accelerate heat dissipation and by adjusting the compressor operation to reduce the heat generation of the compressor, the air conditioning unit can be adjusted to dissipate heat according to the heat dissipation situation under different operating conditions. This avoids the problem of poor heat dissipation effect caused by fixing the condenser fan speed, improves the heat dissipation effect, and at the same time avoids excessively high condenser temperature and poor heat exchange effect of the air conditioning unit, thereby improving the stability and heat exchange effect of the air conditioning unit operation and meeting the user's heat exchange needs in a timely manner.

[0038] In a preferred embodiment of the present invention, the heat dissipation state includes at least: good heat dissipation, slightly poor heat dissipation, and severely poor heat dissipation. Determining the heat dissipation state of the air conditioning unit based on the condenser temperature and the condenser fan's airflow includes: determining whether the condenser temperature is greater than or equal to a preset temperature threshold and whether the condenser fan's airflow is less than or equal to a preset airflow threshold within a consecutive preset number of detection cycles; if so, the heat dissipation state is determined to be severely poor; otherwise, it is further determined whether the condenser temperature is less than the preset temperature threshold. When the condenser temperature is less than the preset temperature threshold, the heat dissipation state is determined to be good; when the condenser temperature is greater than or equal to the preset temperature threshold, the heat dissipation state is determined to be slightly poor. As mentioned above, the condenser temperature and the condenser fan's airflow can accurately reflect the heat dissipation state of the air conditioning unit. Specifically, when the condenser temperature is less than the preset temperature threshold, it indicates that the condenser temperature is normal. At this time, whether the fan's airflow is high or low, it can dissipate the heat at the condenser in time, thus determining the heat dissipation state as good. When the condenser temperature is greater than or equal to the preset temperature threshold, it indicates that the condenser temperature is already high, resulting in poor heat dissipation. If the condenser fan's airflow is greater than the preset airflow threshold, or occasionally less than or equal to the preset airflow threshold, it indicates that the heat dissipation is not too bad, thus the heat dissipation status is determined to be slightly poor. When the condenser temperature is greater than or equal to the preset temperature threshold and the condenser fan's airflow is less than or equal to the preset airflow threshold within a preset number of consecutive detection cycles, it indicates that the condenser temperature is too high and the fan is completely insufficient to dissipate heat, thus the heat dissipation status is determined to be severely poor. Accurately determining the current heat dissipation status of the air conditioning unit through the above methods allows for precise control of the air conditioning unit and improves heat dissipation efficiency.

[0039] After determining the heat dissipation status, the operation of the condenser fan and compressor of the air conditioning unit is controlled according to the heat dissipation status. This includes: adjusting the operation of the condenser fan for energy-saving control when the air conditioning unit's heat dissipation is good; adjusting the operation of the condenser fan for heat dissipation control when the air conditioning unit's heat dissipation is slightly poor; and adjusting the operation of the compressor for heat dissipation control when the air conditioning unit's heat dissipation is severely poor. In other words, when heat dissipation is good, adjusting the operation of the condenser fan for energy-saving control ensures energy saving while maintaining the air conditioning unit's heat dissipation effect, reducing the operating cost of the air conditioning unit. Optimized heat dissipation efficiency helps reduce unnecessary energy consumption, making the cooling process more energy-efficient. For example, appropriately reducing the fan speed in low-load or low-temperature environments can significantly save electricity. When heat dissipation is poor, different heat dissipation controls are implemented according to the degree of heat dissipation. This includes adjusting the condenser fan for slight heat dissipation problems to dissipate heat as quickly as possible without affecting the compressor's operation; and adjusting the compressor's operation to match the compressor's operation with the condenser's heat dissipation or temperature in severe heat dissipation problems to avoid condenser overheating and affecting the overall operating performance of the unit. By employing the methods described above, corresponding control strategies are implemented for different heat dissipation states to optimize the operation of the air conditioning unit as much as possible, such as saving energy and improving heat dissipation efficiency.

[0040] Specifically, energy-saving control involves adjusting the operation of the condenser fan, including: reducing the condenser fan's operating speed or setting; and heat dissipation control involves adjusting the condenser fan's operation, including: increasing the condenser fan's operating speed or setting; and heat dissipation control involves adjusting the compressor's operation, including: reducing the compressor's operating frequency or setting. In other words, energy-saving control involves reducing the condenser fan's operating speed or setting to save energy without affecting the compressor's operation. Heat dissipation control involves increasing the condenser fan's operating speed or setting to improve heat dissipation efficiency, or adjusting the compressor's operating frequency or setting to reduce heat generation and improve heat dissipation.

[0041] The above method can flexibly adjust the fan speed and compressor frequency according to different operating conditions, which has high practicality and adaptability, is suitable for a variety of application scenarios, and improves the overall stability and reliability of the system.

[0042] In another preferred embodiment of the present invention, after controlling the operation of the condenser fan and compressor of the air conditioning unit according to the heat dissipation status of the air conditioning unit, the method further includes: acquiring the outdoor ambient temperature; predicting the heat dissipation trend of the air conditioning unit based on the outdoor ambient temperature and the air volume of the condenser fan; and controlling the operation of the condenser fan and compressor based on the heat dissipation trend. By predicting the heat dissipation trend of the air conditioning unit in advance by using the outdoor ambient temperature and the air volume of the condenser fan, i.e., whether the heat dissipation effect is developing in a better or worse direction, early intervention can be made to improve the heat dissipation efficiency and heat exchange effect of the air conditioning unit.

[0043] Preferably, predicting the heat dissipation trend of the air conditioning unit based on the outdoor ambient temperature and the condenser fan's airflow includes: determining whether the outdoor ambient temperature is continuously rising and whether the condenser fan's airflow is continuously decreasing; if the outdoor ambient temperature is continuously rising and the condenser fan's airflow is continuously decreasing, the heat dissipation trend is determined to be a continuous decline; otherwise, the heat dissipation trend is determined to be a stable heat dissipation. Rising outdoor ambient temperature is detrimental to heat dissipation, and a decrease in condenser fan airflow is also detrimental to heat dissipation. Therefore, under these two conditions, a decline in heat dissipation can be predicted, allowing for early intervention to improve heat dissipation efficiency.

[0044] Specifically, the operation of the condenser fan and compressor is controlled based on the heat dissipation trend, including: when the heat dissipation trend is a continuous decline, increasing the operating speed or setting of the condenser fan and decreasing the operating frequency or setting of the compressor. In other words, when a continuous decline in heat dissipation is predicted, in advance, by improving heat dissipation methods such as increasing the fan speed or decreasing the compressor operating frequency, poor heat dissipation is prevented, maintaining the temperature stability of the condenser and the heat exchange effect of the air conditioning unit.

[0045] To further enhance the intelligence of air conditioning unit control, the unit is equipped with a wind speed sensor to detect the airflow of the condenser fan and a first temperature sensor to acquire the condenser temperature. When the wind speed sensor malfunctions, historical data on the condenser fan's airflow is acquired to determine its historical average. Based on a first preset relationship table, the operating frequency or speed of the compressor corresponding to this historical average is determined, and the compressor is controlled according to this operating frequency or speed. The first preset relationship table corresponds to the condenser fan's airflow and the compressor's operating frequency or speed when heat dissipation is severely inadequate. When the first temperature sensor malfunctions, historical data on the condenser temperature is acquired to determine its historical average. Based on a second preset relationship table, the operating speed or speed of the condenser fan corresponding to this historical average is determined, and the condenser is controlled according to this operating speed or speed. The second preset relationship table corresponds to the condenser temperature and the condenser's operating speed or speed when heat dissipation is slightly inadequate. When both the wind speed sensor and the first temperature sensor are operating normally, the condenser temperature and condenser fan's airflow are acquired. In cases where the actual airflow cannot be detected, a condenser fan airflow rate is determined using historical data. The compressor's operating frequency or speed is then determined based on this value, matching the compressor's operation with the airflow to prevent the compressor from generating excessive heat during high-speed operation and causing the condenser to overheat. Similarly, in cases where the condenser temperature cannot be detected, a condenser temperature is determined using historical data. The condenser fan's operating frequency or speed is then determined based on this value, matching the condenser fan's operation with the condenser temperature to prevent the condenser from overheating.

[0046] In another preferred embodiment of the invention, before acquiring the condenser temperature and the condenser fan output volume, the method further includes: acquiring the indoor ambient temperature and determining whether the indoor ambient temperature meets the preset requirements; if so, triggering the acquisition of the condenser temperature and the condenser fan output volume; otherwise, controlling the compressor to enter a high-frequency operation mode until the indoor ambient temperature meets the preset requirements, and then triggering the acquisition of the condenser temperature and the condenser fan output volume. When controlling the air conditioning unit, it first determines whether the indoor ambient temperature meets the user's set temperature requirements, and the control system continuously reads the indoor ambient temperature, such as the data from the cold storage internal temperature sensor (T2). Then it determines whether the current storage temperature is within the allowable fluctuation range of the user-set temperature (e.g., ±0.5℃). If it exceeds the range, the high-frequency operation mode of the compressor is preferentially activated, that is, the compressor runs at a higher frequency to quickly restore the storage temperature to the set temperature, and the fan speed is not adjusted temporarily to meet the user's needs. If it is within the set temperature range, proceed to the next step to perform heat dissipation control.

[0047] The following example illustrates this: Assume a cold storage room is set to -18℃, and the current temperature is -17.5℃, which is within the allowable fluctuation range. At this time, the condenser temperature T1 is 52℃, slightly higher than the ideal value (48℃); the measured airflow V is 1300-1400 m³ / h, consistently lower than the target value of 1500 m³ / h; and the outside air temperature T3 is 26℃, higher than the storage temperature.

[0048] The system determined that there was a serious problem with heat dissipation and immediately took the following measures: the fan speed was increased from 1200 rpm to 1400 rpm, the air volume was increased to 1700 m³ / h, and the compressor frequency was reduced from 60 Hz to 56 Hz. The system detected a continuous downward trend in air volume and an increase in T3, indicating a continued decline in heat dissipation. Therefore, the fan speed was further increased to 1450 rpm.

[0049] Continuously monitor changes in T1 and V. If T1 remains stable below 48℃, the system will gradually reduce the fan speed to 1350rpm to achieve energy-saving operation.

[0050] If the wind sensor signal is abnormal, the system automatically switches to fault-tolerant mode and calculates the compressor frequency based on historical air volume to ensure continuous system operation.

[0051] Traditional condenser control strategies typically rely on fixed fan speeds. This approach may not achieve optimal heat dissipation under varying operating conditions (such as changes in ambient temperature and fluctuations in cold storage load). Especially when cold storage temperature requirements vary significantly, a fixed fan speed struggles to simultaneously ensure stable internal ambient temperature and efficient condenser heat dissipation. How to dynamically adjust the operation of the fan and compressor based on actual needs to improve condenser heat dissipation efficiency and optimize the overall energy efficiency ratio of the refrigeration system has become a pressing issue. This invention monitors condenser temperature (T1), cold storage internal ambient temperature (T2), outdoor ambient temperature (T3), and fan output airflow (V) in real time. Applying an airflow-temperature collaborative feedback mechanism, it uses condenser temperature and output airflow as core control variables to dynamically adjust fan speed and compressor frequency. This method allows for flexible adjustments based on actual operating conditions, ensuring that the user's cold storage temperature requirements are met while maximizing condenser heat dissipation efficiency.

[0052] In a preferred embodiment 1 of the present invention, another method for controlling an air conditioning unit is also provided, specifically... Figure 2 An optional flowchart of the method is shown, such as Figure 2 As shown, the method includes the following steps S201-S229:

[0053] S201: Beginning;

[0054] S202: Initialize system state;

[0055] S203: User sets the required temperature range;

[0056] S204: Read data from the second temperature sensor (T2); Second temperature sensor (T2): Installed inside the cold storage to monitor the actual ambient temperature inside the storage.

[0057] S205: Is T2 within the set range? If yes, proceed to step S207; otherwise, proceed to step S206.

[0058] S206: High-frequency operation mode, which means the compressor operates at high frequency to prioritize heat exchange capacity;

[0059] S207: Read the data from the first temperature sensor (T1). The first temperature sensor (T1) is installed on the surface of the condenser and is used to collect the current temperature of the condenser in real time.

[0060] S208: Read wind speed sensor (V) data. The wind speed sensor is installed at the outlet of the condenser fan to measure the current air volume (V) of the fan and reflect the actual operating status of the fan.

[0061] S209: Is T1 within the target range? If T1 is too high, proceed to step S210; if T1 is too low, proceed to step S211; otherwise, proceed to step S212.

[0062] S210: Increase fan speed;

[0063] S211: Reduce fan speed;

[0064] S212: Is the air volume V within the target range? If yes, proceed to step S213. If the air volume V is too low, proceed to step S214. If the air volume V is too high, proceed to step S215.

[0065] S213: Continue running, then proceed to step S229;

[0066] S214: Increase fan speed;

[0067] S215: Reduce fan speed;

[0068] S216: Does the air volume V decrease or increase three times consecutively? If yes, proceed to step S218 or S219; otherwise, proceed to step S217.

[0069] S217: Continue running, then proceed to step S229;

[0070] S218: Based on fcomp = g(V), reduce the compressor frequency; based on the positive correlation between air volume V and condensing pressure, calculate the current condensing pressure and adjust the compressor frequency accordingly: fcomp = g(V), where fcomp is the compressor frequency and g is the load-frequency conversion function, thereby determining the compressor frequency;

[0071] S219: Based on fcomp = g(V), increase the compressor frequency;

[0072] S220: Compare T3 with T2. If T3 > T2 + 5℃, proceed to step S221. If T3 = T2, proceed to step S222. If T3 < T2, proceed to step S223.

[0073] S221: Increase fan speed;

[0074] S222: Maintain fan speed;

[0075] S223: Reduce fan speed;

[0076] S224: Is the wind sensor malfunctioning? If yes, proceed to step S226; otherwise, proceed to step S225.

[0077] S225: Continue running, then proceed to step S229;

[0078] S226: Activate fault-tolerant mode and adjust the compressor frequency based on historical air volume;

[0079] S227: Output control command;

[0080] S228: Closed-loop feedback and adaptive optimization; the system collects data once per minute to form closed-loop control; fuzzy PID algorithm or machine learning model is introduced to optimize the control strategy online, gradually adapting to the optimal operating curve under different operating conditions; historical operating data is recorded simultaneously to support remote diagnostics and operation and maintenance management.

[0081] S229: End.

[0082] The above control method can flexibly adjust the fan speed and compressor frequency according to different operating conditions, which has high practicality and adaptability, is suitable for a variety of application scenarios, and improves the overall stability and reliability of the system.

[0083] Example 2

[0084] Based on the air conditioning unit control method provided in Embodiment 1 above, a preferred embodiment 2 of the present invention further provides an air conditioning unit control system, including: a first temperature sensor for acquiring condenser temperature; a wind speed sensor for detecting the airflow of the condenser fan; and a main control unit, one end of which is connected to the first temperature sensor and the wind speed sensor, and the other end of which is connected to the condenser fan and the compressor of the air conditioning unit, for determining the heat dissipation state of the air conditioning unit based on the condenser temperature and the airflow of the condenser fan, and controlling the condenser fan and the compressor based on the heat dissipation state of the air conditioning unit.

[0085] Specifically, Figure 3 This diagram illustrates one possible structural design of the system, such as... Figure 3 As shown, the system includes:

[0086] Fan blade 1, whose speed is adjusted by the fan;

[0087] Condenser 2, with a first temperature sensor mounted on its surface for real-time acquisition of the condenser's current temperature;

[0088] Variable frequency compressor 3;

[0089] Main control unit 4 receives data and controls the operation of the system.

[0090] Figure 4 An alternative structural block diagram of the system is also shown, such as Figure 4 As shown, the system includes:

[0091] Temperature sensor module, including:

[0092] First temperature sensor (T1): Installed on the surface of the condenser, used to collect the current temperature of the condenser in real time;

[0093] Second temperature sensor (T2): installed inside the cold storage to monitor the actual ambient temperature inside the storage;

[0094] The third temperature sensor (T3) is placed in the outdoor environment to obtain the ambient temperature of the day.

[0095] The central control system (main control unit) receives data from various sensors, executes preset control logic, and outputs fan speed commands and compressor frequency adjustment commands.

[0096] Wind power sensor module—measures the air volume output of the fan and is installed at the outlet of the condenser fan;

[0097] Fan speed control device—variable frequency motor / stepless speed regulation, adopts a variable frequency motor or stepless speed regulation drive device, receives signals from the controller, and adjusts the fan speed as needed;

[0098] The compressor frequency controller works in conjunction with the fan control system to adjust the compressor operating frequency according to changes in air volume.

[0099] In the above embodiments, a control scheme for an air conditioning unit is provided. By acquiring parameters characterizing the heat dissipation capacity of the condenser, including condenser temperature and condenser fan airflow, the heat dissipation state of the air conditioning unit is determined collaboratively based on the condenser temperature and condenser fan airflow. Then, the operation of the condenser fan and compressor is dynamically adjusted according to the heat dissipation state of the air conditioning unit. By adjusting the condenser fan to accelerate heat dissipation and by adjusting the compressor operation to reduce the heat generation of the compressor, the air conditioning unit can be adjusted to dissipate heat according to the heat dissipation situation under different operating conditions. This avoids the problem of poor heat dissipation effect caused by fixing the condenser fan speed, improves the heat dissipation effect, and at the same time avoids excessively high condenser temperature and poor heat exchange effect of the air conditioning unit, thereby improving the stability and heat exchange effect of the air conditioning unit operation and meeting the user's heat exchange needs in a timely manner.

[0100] Example 3

[0101] Based on the air conditioning unit control system provided in Embodiment 2 above, an air conditioning unit is further provided in a preferred embodiment 3 of the present invention, including the air conditioning unit control system as described above.

[0102] In the above embodiments, a control scheme for an air conditioning unit is provided. By acquiring parameters characterizing the heat dissipation capacity of the condenser, including condenser temperature and condenser fan airflow, the heat dissipation state of the air conditioning unit is determined collaboratively based on the condenser temperature and condenser fan airflow. Then, the operation of the condenser fan and compressor is dynamically adjusted according to the heat dissipation state of the air conditioning unit. By adjusting the condenser fan to accelerate heat dissipation and by adjusting the compressor operation to reduce the heat generation of the compressor, the air conditioning unit can be adjusted to dissipate heat according to the heat dissipation situation under different operating conditions. This avoids the problem of poor heat dissipation effect caused by fixing the condenser fan speed, improves the heat dissipation effect, and at the same time avoids excessively high condenser temperature and poor heat exchange effect of the air conditioning unit, thereby improving the stability and heat exchange effect of the air conditioning unit operation and meeting the user's heat exchange needs in a timely manner.

[0103] Example 4

[0104] Based on the air conditioning unit control method provided in Embodiment 1 above, in a preferred embodiment 4 of the present invention, a storage medium containing computer-executable instructions is also provided, wherein the computer-executable instructions are used to execute the air conditioning unit control method as described above when executed by a computer processor.

[0105] In the above embodiments, a control scheme for an air conditioning unit is provided. By acquiring parameters characterizing the heat dissipation capacity of the condenser, including condenser temperature and condenser fan airflow, the heat dissipation state of the air conditioning unit is determined collaboratively based on the condenser temperature and condenser fan airflow. Then, the operation of the condenser fan and compressor is dynamically adjusted according to the heat dissipation state of the air conditioning unit. By adjusting the condenser fan to accelerate heat dissipation and by adjusting the compressor operation to reduce the heat generation of the compressor, the air conditioning unit can be adjusted to dissipate heat according to the heat dissipation situation under different operating conditions. This avoids the problem of poor heat dissipation effect caused by fixing the condenser fan speed, improves the heat dissipation effect, and at the same time avoids excessively high condenser temperature and poor heat exchange effect of the air conditioning unit, thereby improving the stability and heat exchange effect of the air conditioning unit operation and meeting the user's heat exchange needs in a timely manner.

[0106] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0107] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0108] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0109] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0110] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0111] If the integrated unit is implemented as 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 present invention, in essence, or the part that contributes to the prior art, or all or part of the 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 cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0112] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not invented by the invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0113] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for controlling an air conditioning unit, characterized in that, include: Obtain the condenser temperature and condenser fan output volume; The heat dissipation status of the air conditioning unit is determined based on the condenser temperature and the air output of the condenser fan. This includes: determining whether the condenser temperature is greater than or equal to a preset temperature threshold and whether the condenser fan output airflow is less than or equal to a preset airflow threshold within a preset number of consecutive detection cycles; if so, determining the heat dissipation state as severely poor heat dissipation; otherwise, further determining whether the condenser temperature is less than the preset temperature threshold; if the condenser temperature is less than the preset temperature threshold, determining the heat dissipation state as good heat dissipation; if the condenser temperature is greater than or equal to the preset temperature threshold, determining the heat dissipation state as slightly poor heat dissipation; the heat dissipation state includes at least: good heat dissipation, slightly poor heat dissipation, and severely poor heat dissipation; The operation of the condenser fan and compressor of the air conditioning unit is controlled according to the heat dissipation status of the air conditioning unit; The air conditioning unit is equipped with a wind speed sensor and a first temperature sensor. The wind speed sensor is used to detect the airflow of the condenser fan, and the first temperature sensor is used to obtain the temperature of the condenser. The method further includes: When the wind sensor malfunctions, historical data of the condenser fan's airflow is acquired, the historical average airflow of the condenser fan is determined, and the operating frequency or speed of the compressor corresponding to the historical average airflow of the condenser fan is determined according to a first preset relationship table. The operation of the compressor is controlled according to the operating frequency or speed of the compressor. The first preset relationship table is a table showing the correspondence between the condenser fan's airflow and the compressor's operating frequency or speed when there is severe heat dissipation failure. When the first temperature sensor fails, historical data of the condenser temperature is acquired, the historical average value of the condenser temperature is determined, and the operating speed or gear of the condenser fan corresponding to the historical average value of the condenser temperature is determined according to the second preset relationship table. The operation of the condenser fan is controlled according to the operating speed or gear of the condenser fan. The second preset relationship table is a table showing the correspondence between the condenser temperature and the operating speed or gear of the condenser fan when there is slight heat dissipation failure. When both the wind sensor and the first temperature sensor are operating normally, the acquisition of the condenser temperature and the condenser fan output is triggered.

2. The method according to claim 1, characterized in that, The heat dissipation status includes at least: good heat dissipation, slightly poor heat dissipation, and severely poor heat dissipation; controlling the operation of the condenser fan and compressor of the air conditioning unit according to the heat dissipation status of the air conditioning unit includes: When the air conditioning unit is in a good heat dissipation state, the operation of the condenser fan is adjusted to achieve energy-saving control. When the air conditioning unit is experiencing slight heat dissipation problems, the operation of the condenser fan is adjusted to control heat dissipation. When the air conditioning unit is in a state of severe heat dissipation failure, the operation of the compressor is adjusted to control heat dissipation.

3. The method according to claim 2, characterized in that, Adjusting the operation of the condenser fan for energy-saving control includes: reducing the operating speed or gear of the condenser fan; Adjusting the operation of the condenser fan for heat dissipation control includes: increasing the operating speed or gear of the condenser fan; Adjusting the operation of the compressor for heat dissipation control includes reducing the operating frequency or speed of the compressor.

4. The method according to claim 1, characterized in that, After controlling the operation of the condenser fan and compressor of the air conditioning unit according to the heat dissipation status of the air conditioning unit, the method further includes: Obtain the outdoor ambient temperature; The heat dissipation trend of the air conditioning unit is predicted based on the outdoor ambient temperature and the air output of the condenser fan. The operation of the condenser fan and the compressor is controlled according to the heat dissipation trend.

5. The method according to claim 4, characterized in that, Predicting the heat dissipation trend of the air conditioning unit based on the outdoor ambient temperature and the condenser fan output volume includes: Determine whether the outdoor ambient temperature is rising continuously and whether the air volume of the condenser fan is decreasing continuously. If the outdoor ambient temperature rises continuously and the air volume of the condenser fan decreases continuously, the heat dissipation trend is determined to be a continuous decline in heat dissipation. Otherwise, the heat dissipation trend is determined to be a stable heat dissipation state.

6. The method according to claim 5, characterized in that, Controlling the operation of the condenser fan and the compressor based on the heat dissipation trend includes: When the heat dissipation trend is that the heat dissipation is continuously decreasing, increase the operating speed or gear of the condenser fan and decrease the operating frequency or gear of the compressor.

7. The method according to claim 1, characterized in that, Before obtaining the condenser temperature and condenser fan output air volume, the following is also included: Obtain the indoor ambient temperature and determine whether the indoor ambient temperature meets the preset requirements; If so, trigger the acquisition of condenser temperature and condenser fan output volume; Otherwise, the compressor is controlled to enter a high-frequency operation mode until the indoor ambient temperature meets the preset requirements, and then the condenser temperature and condenser fan air volume are obtained.

8. An air conditioning unit control system, characterized in that, include: The first temperature sensor is used to obtain the condenser temperature; A wind speed sensor is used to detect the airflow from the condenser fan. The main control unit, with one end connected to the first temperature sensor and the wind force sensor, and the other end connected to the condenser fan and compressor of the air conditioning unit, is used to determine the heat dissipation status of the air conditioning unit based on the condenser temperature and the airflow of the condenser fan. This includes: determining whether the condenser temperature is greater than or equal to a preset temperature threshold and whether the airflow of the condenser fan is less than or equal to a preset airflow threshold within a preset number of consecutive detection cycles; if so, determining the heat dissipation status as severely poor; otherwise, further determining whether the condenser temperature is less than the preset temperature threshold; if the condenser temperature is less than the preset temperature threshold, determining the heat dissipation status as good; if the condenser temperature is greater than or equal to the preset temperature threshold, determining the heat dissipation status as slightly poor; the heat dissipation status includes at least: good heat dissipation, slightly poor heat dissipation, and severely poor heat dissipation; and also used to control the condenser fan and compressor based on the heat dissipation status of the air conditioning unit. The main control unit is further configured to: acquire historical data of the condenser fan's airflow volume when the wind sensor malfunctions, determine the historical average airflow volume of the condenser fan, determine the operating frequency or speed of the compressor corresponding to the historical average airflow volume of the condenser fan according to a first preset relationship table, and control the operation of the compressor according to the operating frequency or speed of the compressor; wherein, the first preset relationship table is a correspondence table between the condenser fan's airflow volume and the operating frequency or speed of the compressor when heat dissipation is severely inadequate; acquire historical data of the condenser temperature when the first temperature sensor malfunctions, determine the historical average condenser temperature, determine the operating speed or speed of the condenser fan corresponding to the historical average condenser temperature according to a second preset relationship table, and control the operation of the condenser fan according to the operating speed or speed of the condenser fan; wherein, the second preset relationship table is a correspondence table between the condenser temperature and the operating speed or speed of the condenser fan when heat dissipation is slightly inadequate; and trigger the acquisition of the condenser temperature and the condenser fan's airflow volume when both the wind sensor and the first temperature sensor are operating normally.

9. An air conditioning unit, characterized in that, Includes the air conditioning unit control system as described in claim 8.

10. A storage medium containing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform the air conditioning unit control method as described in any one of claims 1 to 7.

Images