Air conditioner pressure control method and device, electronic equipment and readable storage medium

Abstract

The invention relates to an air conditioner pressure control method and device, electronic equipment and a readable storage medium, and belongs to the technical field of air conditioner control. The method comprises the steps of determining the operation state of the air conditioning unit; and pressure value simulation is conducted on the air conditioning unit according to the operation state and the air conditioning unit temperature, and the output frequency of a corresponding compressor is adjusted according to a pressure value simulation result. The air conditioning unit is subjected to pressure value simulation by combining the operating state of the air conditioning unit with the temperature, and the output frequency of the compressor is adjusted according to the simulation result, so that the problem that the air conditioning system is unstable due to pressure protection when the pressure of the air conditioning system without a pressure sensor changes is solved.

Description

Technical Field

[0001] The present application relates to the field of air conditioning control technology, and in particular to an air conditioning pressure control method, device, electronic device and storable medium. Background Art

[0002] In the development history of miniaturized household central air conditioners, with the advancement of technology and consumers' pursuit of space utilization, the design of air-conditioning units has become more and more compact, which has put forward higher requirements on the integration of air-conditioning systems and the layout of components. In traditional air-conditioning systems, pressure sensors are key components responsible for real-time monitoring of the pressure state of refrigerant in the air-conditioning system pipelines, providing accurate data support for controlling the air-conditioning system, thereby realizing accurate regulation of key parameters such as compressor frequency and expansion valve opening. However, in the process of miniaturization, due to space limitations, some key components such as pressure sensors may be difficult to find a suitable installation location, or even cannot be included in the design. In the absence of a pressure sensor, the air-conditioning system cannot directly obtain the key parameter of refrigerant pressure, and it is difficult to implement a precise control strategy based on pressure feedback. Not only may the output efficiency of the air-conditioning system be reduced, but the protection mechanism may also be triggered due to the inability to respond to pressure abnormalities in a timely manner, causing the air-conditioning system to shut down frequently or operate unstable, seriously affecting the user experience and the long-term reliability of the equipment.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The present application provides an air conditioning pressure control method, device, electronic device and storable medium to solve the technical problems that the above-mentioned air conditioning unit without pressure sensor cannot directly obtain the condenser pressure, resulting in low output efficiency of the air conditioning system, and easily causes pressure protection to cause air conditioning system failure.

[0005] According to one aspect of an embodiment of the present application, the present application provides an air-conditioning pressure control method, including: determining the operating state of the air-conditioning unit; simulating the pressure value of the air-conditioning unit according to the operating state combined with the temperature of the air-conditioning unit, and adjusting the output frequency of the corresponding compressor according to the pressure value simulation result.

[0006] Optionally, the pressure value simulation of the air-conditioning unit is performed according to the operating state in combination with the temperature of the air-conditioning unit, and the output frequency of the corresponding compressor is adjusted according to the pressure value simulation result, including: obtaining the temperature of the air-conditioning unit, including the heat exchanger temperature, the middle pipe temperature, the inlet pipe temperature and the outlet pipe temperature; if the operating state of the air-conditioning unit is a cooling state, the pressure value simulation of the air-conditioning unit is performed according to the heat exchanger temperature to determine a first simulated pressure temperature and the output frequency of the compressor is adjusted based on the first simulated pressure temperature; if the operating state of the air-conditioning unit is a heating state, it is detected whether there is an abnormal middle pipe temperature in all indoor units of the air-conditioning unit. If there is no abnormal middle pipe temperature, the pressure value simulation is performed according to the average middle pipe temperature to determine the second simulated pressure temperature and the output frequency of the compressor is adjusted based on the second simulated pressure temperature; if there is an abnormal middle pipe temperature, the pressure value simulation is performed according to the inlet pipe temperature and the outlet pipe temperature of the indoor unit to determine the third simulated pressure temperature and the output frequency of the compressor is adjusted based on the third simulated pressure temperature.

[0007] Optionally, simulating the pressure value of the air-conditioning unit according to the temperature of the heat exchanger to determine a first simulated pressure temperature and adjusting the output frequency of the compressor based on the first simulated pressure temperature includes: acquiring a temperature value of the heat exchanger corresponding to the air-conditioning unit in a cooling state;

[0008] The temperature value of the heat exchanger is set to the first simulated pressure temperature of the currently running compressor; the output frequency of the currently running compressor is adjusted based on the first simulated pressure temperature; the state of the temperature sensing bag circuit of the heat exchanger is detected, and if the state of the temperature sensing bag circuit is disconnected or short-circuited, the air conditioning unit is stopped.

[0009] Optionally, the output frequency of the currently running compressor is adjusted based on the first simulated pressure temperature, including: determining a temperature threshold, the temperature threshold including a first temperature threshold, a second temperature threshold and a third temperature threshold that increase in sequence; when the first simulated pressure temperature is greater than the first temperature threshold and less than the second temperature threshold, limiting the increase in the output frequency of the compressor; when the first simulated pressure temperature is greater than the second temperature threshold and less than the third temperature threshold, adjusting the output frequency of the compressor based on a first frequency adjustment step; when the first simulated pressure temperature is greater than the third temperature threshold, adjusting the output frequency of the compressor based on a second frequency adjustment step; wherein the second frequency adjustment step is greater than the first frequency adjustment step; when the first simulated pressure temperature is less than the first temperature threshold, restoring the output frequency of the compressor.

[0010] Optionally, the pressure value simulation based on the average middle tube temperature determines the second simulated pressure temperature and adjusts the output frequency of the compressor based on the second simulated pressure temperature, including: calculating the average middle tube temperature of all turned-on indoor units of the air-conditioning unit; determining a first simulated temperature and a second simulated temperature based on the average middle tube temperature, the first simulated temperature being greater than the second simulated temperature; performing pressure value simulation based on the first simulated temperature within a preset time after the compressor is successfully started; performing pressure value simulation based on the second simulated temperature after a preset time after the compressor is successfully started; and adjusting the output frequency of the compressor according to the second simulated temperature.

[0011] Optionally, adjusting the output frequency of the compressor according to the second simulated temperature includes: setting a target pressure-temperature value; when the second simulated temperature is lower than the target pressure-temperature value, increasing the output frequency of the compressor; when the second simulated temperature is higher than the target pressure-temperature value, reducing the output frequency of the compressor; synchronously, adjusting the output frequency of the compressor according to the relationship between the second simulated temperature and the temperature threshold.

[0012] Optionally, the adjusting the output frequency of the compressor according to the magnitude relationship between the second simulated temperature and the temperature threshold includes: determining the temperature threshold, the temperature threshold includes a first temperature threshold, a second temperature threshold and a third temperature threshold which increase in sequence; if the second simulated temperature is greater than the first temperature threshold and less than the second temperature threshold, limiting the increase of the current output frequency of the compressor; if the second simulated temperature is greater than the second temperature threshold and less than the third temperature threshold, setting a first frequency adjustment step of the output frequency of the compressor; if the second simulated temperature is greater than the third temperature threshold, setting a second frequency adjustment step of the output frequency of the compressor, the second frequency adjustment step being greater than the first frequency adjustment step; if the second simulated temperature is less than the first temperature threshold, restoring the output frequency of the compressor.

[0013] Optionally, the pressure value simulation based on the inlet pipe temperature and the outlet pipe temperature of the indoor unit to determine a third simulated pressure temperature and adjusting the output frequency of the compressor based on the third simulated pressure temperature includes: determining the initial operation time of the air-conditioning unit; during the initial operation time of the air-conditioning unit, the pressure value simulation based on the average middle pipe temperature of the indoor unit is performed and the output frequency of the compressor is adjusted; after the initial operation time of the air-conditioning unit, if there is an indoor unit that is shut down or stopped at a temperature point, the pressure value simulation based on the inlet pipe temperature combined with the outlet pipe temperature is performed to determine the third simulated pressure temperature, and the output frequency of the compressor is adjusted based on the third simulated pressure temperature; if there is no indoor unit that is shut down or stopped at a temperature point, the pressure value simulation based on the average middle pipe temperature of the indoor unit is performed to determine the third simulated pressure temperature, and the output frequency of the compressor is adjusted based on the third simulated pressure temperature.

[0014] Optionally, simulating the pressure value according to the average middle tube temperature of the indoor units and adjusting the output frequency of the compressor include: calculating the average middle tube temperature of all indoor units and setting an initial simulated pressure temperature based on the average middle tube temperature of the indoor units; determining a target pressure temperature value, and if the initial simulated pressure temperature is lower than the target pressure temperature value, increasing the output frequency of the current compressor; if the initial simulated pressure temperature is higher than the target pressure temperature value, reducing the output frequency of the current compressor; synchronously, adjusting the output frequency of the compressor according to the relationship between the initial simulated pressure temperature and the temperature threshold.

[0015] Optionally, the method of adjusting the output frequency of the compressor according to the relationship between the initial simulated pressure temperature and the temperature threshold includes: determining a temperature threshold, the temperature threshold including a first temperature threshold, a second temperature threshold and a third temperature threshold that increase in sequence; when the initial simulated pressure temperature is greater than the first temperature threshold and less than the second temperature threshold, limiting the increase in the output frequency of the compressor; when the initial simulated pressure temperature is greater than the second temperature threshold and less than the third temperature threshold, adjusting the output frequency of the compressor based on a first frequency adjustment step; when the initial simulated pressure temperature is greater than the third temperature threshold, adjusting the output frequency of the compressor based on a second frequency adjustment step; wherein the second frequency adjustment step is greater than the first frequency adjustment step; and when the initial simulated pressure temperature is less than the first temperature threshold, restoring the output frequency of the compressor.

[0016] Optionally, the pressure value simulation is performed according to the inlet pipe temperature in combination with the outlet pipe temperature to determine a third simulated pressure temperature, and the output frequency of the compressor is adjusted based on the third simulated pressure temperature, including: calculating the third simulated pressure temperature according to the inlet pipe temperature and the outlet pipe temperature; determining a target pressure temperature value, if the third simulated pressure temperature is lower than the target pressure temperature value, increasing the output frequency of the current compressor; if the third simulated pressure temperature is higher than the target pressure temperature value, reducing the output frequency of the current compressor; synchronously, adjusting the output frequency of the compressor according to the relationship between the third simulated pressure temperature and the temperature threshold.

[0017] Optionally, the method of adjusting the output frequency of the compressor according to the relationship between the third simulated pressure temperature and the temperature threshold includes: determining a temperature threshold, the temperature threshold including a first temperature threshold, a second temperature threshold and a third temperature threshold that increase in sequence; when the third simulated pressure temperature is greater than the first temperature threshold and less than the second temperature threshold, limiting the increase in the output frequency of the compressor; when the third simulated pressure temperature is greater than the second temperature threshold and less than the third temperature threshold, adjusting the output frequency of the compressor based on a first frequency adjustment step; when the third simulated pressure temperature is greater than the third temperature threshold, adjusting the output frequency of the compressor based on a second frequency adjustment step; wherein the second frequency adjustment step is greater than the first frequency adjustment step; when the third simulated pressure temperature is less than the first temperature threshold, restoring the output frequency of the compressor.

[0018] According to another aspect of the embodiment of the present application, the present application provides an air-conditioning pressure control device, including: a state judgment module, used to determine the operating state of the air-conditioning unit; a simulation adjustment module, used to simulate the pressure value of the air-conditioning unit according to the operating state combined with the temperature of the air-conditioning unit, and adjust the output frequency of the corresponding compressor according to the pressure value simulation result.

[0019] According to another aspect of an embodiment of the present application, the present application provides an electronic device, including 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, and is characterized in that the processor implements the instructions of the above-mentioned air conditioning pressure control method when executing the computer program.

[0020] According to another aspect of the embodiment of the present application, the present application also provides a readable storage medium storing program instructions, and when the program instructions are read and executed by a computing device, the computing device executes the above-mentioned air conditioning pressure control method.

[0021] The above technical solution provided by the embodiment of the present application has the following advantages compared with the related art:

[0022] The present application can accurately simulate the pressure state inside the air-conditioning unit without relying on direct pressure measurement through pressure simulation automatic switching control, which not only avoids the instability of the air-conditioning system caused by the failure or loss of the pressure sensor, but also significantly improves the stability and reliability of the air-conditioning system under various operating conditions. According to the operating state of the air-conditioning unit, as well as the heat exchanger temperature, the middle tube temperature (including the average middle tube temperature and the inlet and outlet tube temperatures under abnormal middle tube temperatures), the pressure value simulation can more accurately adjust the output frequency of the compressor. This adjustment method based on real-time data feedback helps to maintain the optimal circulation state of the refrigerant inside the air-conditioning system, thereby improving the energy efficiency and comfort of the air-conditioning system. It can automatically identify and handle the abnormal middle tube temperature, and ensure the stable operation of the air-conditioning system through different pressure simulation strategies (such as based on the average middle tube temperature or based on the inlet and outlet tube temperatures). This adaptive ability enables the air-conditioning system to better cope with various complex working conditions and improves the overall performance and user satisfaction of the air-conditioning system. Since it no longer relies on pressure sensors, the number and complexity of key components are reduced, thereby reducing the maintenance cost and failure rate of the air-conditioning system. At the same time, by optimizing the adjustment strategy of the compressor output frequency, the service life of the air-conditioning system can be further extended, bringing users a more economical and efficient air-conditioning experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0025] Figure 1 A schematic diagram of a hardware environment of an air conditioning pressure control method provided according to an embodiment of the present application;

[0026] Figure 2 A schematic diagram of a flow chart of an air conditioning pressure control method provided according to an embodiment of the present application;

[0027] Figure 3 A schematic diagram of the structure of an air conditioning system provided in an embodiment of the present application;

[0028] Figure 4 A detailed flow chart of an air conditioning pressure control method provided in an embodiment of the present application;

[0029] Figure 5It is a structural schematic diagram of an air-conditioning pressure control device provided according to an embodiment of the present application;

[0030] Figure 6 A schematic diagram of the structure of an optional electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0032] In the subsequent description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present application and have no specific meaning. Therefore, "module" and "component" can be used interchangeably.

[0033] In the related art, since an air-conditioning system without a pressure sensor cannot directly obtain the refrigerant pressure, it may be unable to respond to pressure abnormalities in a timely manner and trigger a protection mechanism, causing the air-conditioning system to frequently shut down or unstable operation.

[0034] In order to solve the problem mentioned in the background technology, according to one aspect of an embodiment of the present application, an embodiment of an air conditioning pressure control method is provided.

[0035] Optionally, in the embodiment of the present application, the air conditioning pressure control method can be applied to Figure 1 In the hardware environment composed of the terminal 101 and the server 103 shown in FIG. Figure 1 As shown, the server 103 is connected to the terminal 101 via a network, and can be used to provide services for the terminal or a client installed on the terminal. A database 105 can be set on the server or independently of the server to provide data storage services for the server 103. The above-mentioned network includes but is not limited to: a wide area network, a metropolitan area network or a local area network. The terminal 101 includes but is not limited to air-conditioning equipment and a control terminal such as a PC, a mobile phone, a tablet computer, etc. that is communicated with the air-conditioning equipment.

[0036] An air conditioning pressure control method in the embodiment of the present application can be executed by the server 103, or can be executed by the server 103 and the terminal 101 together, such as Figure 2 As shown, the method may include the following steps:

[0037] S202, determining the operating status of the air conditioning unit;

[0038] Understandably, if Figure 3 The figure shows the structure of the air conditioning system. The air conditioning system consists of an outdoor unit and n indoor units. The indoor units and the outdoor units are connected by communication lines. Figure 4 The figure shows a detailed flow chart of a pressure control method in an embodiment of the present application. Before determining the operating state of the air-conditioning unit in step S202, the present embodiment further includes:

[0039] The air conditioning unit is powered on;

[0040] Detect whether there is a pressure sensor in the air conditioning unit. If there is no pressure sensor, the air conditioning unit switches the pipe temperature for simulation;

[0041] External unit detection pressure value;

[0042] Check whether the pressure sensor is offset or abnormal. If so, the air conditioning unit switches the pipeline temperature for simulation. Otherwise, the output frequency of the compressor is adjusted according to the pressure value of the pressure sensor.

[0043] In the above implementation, by detecting whether there is a pressure sensor in the air-conditioning unit, and automatically switching to the use of pipeline temperature for simulation when it is missing, it is ensured that the air-conditioning unit can operate stably under different configurations, and the compatibility of the system is improved. The pressure sensor is detected for offset or abnormality, and once the problem is found, it is switched to the backup plan, which effectively avoids the system out of control due to sensor failure and enhances the reliability of the system. When the pressure sensor is working normally, the output frequency of the compressor is adjusted according to the real-time pressure value of the pressure sensor. This control strategy based on actual pressure feedback can more accurately adjust the cooling / heating capacity of the air-conditioning system and improve the energy efficiency ratio. Compared with the traditional control method that relies on fixed parameters or experience values, this dynamic control method is more adaptable to different environmental conditions and user needs, and improves the user experience. Through the automated detection and switching mechanism, countermeasures can be taken quickly when the pressure sensor fails, avoiding the time delay caused by troubleshooting and manual adjustment, improving the efficiency of fault handling, helping to reduce the losses caused by downtime due to failure, and ensuring the continuous and stable operation of the air-conditioning system.

[0044] S204, simulating the pressure value of the air-conditioning unit according to the operating state and the temperature of the air-conditioning unit, and adjusting the output frequency of the corresponding compressor according to the pressure value simulation result.

[0045] Further, S204 includes:

[0046] Get the temperature of the air conditioning unit, including the heat exchanger temperature, middle pipe temperature, inlet pipe temperature and outlet pipe temperature;

[0047] If the operating state of the air-conditioning unit is the cooling state, a pressure value simulation is performed on the air-conditioning unit according to the temperature of the heat exchanger to determine a first simulated pressure temperature and the output frequency of the compressor is adjusted based on the first simulated pressure temperature;

[0048] If the operation state of the air-conditioning unit is the heating state, then all the indoor units of the air-conditioning unit are detected to see if there is any abnormality in the middle tube temperature. If there is no abnormality in the middle tube temperature, a pressure value simulation is performed according to the average middle tube temperature to determine a second simulated pressure temperature and the output frequency of the compressor is adjusted based on the second simulated pressure temperature;

[0049] If there is an abnormal temperature of the middle pipe, a pressure value simulation is performed according to the inlet pipe temperature and the outlet pipe temperature of the indoor unit to determine a third simulated pressure temperature, and the output frequency of the compressor is adjusted based on the third simulated pressure temperature. Further, a pressure value simulation is performed on the air-conditioning unit according to the heat exchanger temperature to determine a first simulated pressure temperature, and the output frequency of the compressor is adjusted based on the first simulated pressure temperature, including:

[0050] Obtain the temperature value of the heat exchanger corresponding to the air-conditioning unit in the cooling state;

[0051] Set the temperature value of the heat exchanger to the first simulated pressure temperature of the currently running compressor;

[0052] adjusting the output frequency of the currently operating compressor based on the first simulated pressure temperature;

[0053] Check the status of the temperature-sensing package circuit of the heat exchanger. If the temperature-sensing package circuit is disconnected or short-circuited, stop running the air-conditioning unit.

[0054] In this embodiment, after the air conditioning system is started, the operating state of the air conditioning unit is first detected to determine whether the air conditioning unit is in a cooling state or a heating state. If the operating state of the air conditioning unit is a cooling state, the pressure value simulation and the compressor frequency adjustment are performed to obtain the temperature value T-hm of the heat exchanger corresponding to the air conditioning unit in the cooling state. The current temperature value is read through the temperature sensor on the heat exchanger, and it is ensured that the data is normal and valid. The read heat exchanger temperature value T-hm is set as the first simulated pressure temperature Tci of the currently running compressor. In the absence of an actual pressure sensor or an abnormal sensor, the heat exchanger temperature is used as the simulated pressure temperature for subsequent adjustments.

[0055] In the above implementation, by simulating the pressure value corresponding to the heat exchanger temperature to determine the first simulated pressure temperature, the working state of the current refrigeration and air-conditioning system can be understood more accurately. By adjusting the compressor output frequency according to the simulated pressure temperature, it can be ensured that the compressor operates under the best working conditions, thereby improving the refrigeration efficiency. By real-time monitoring the state of the temperature-sensing package circuit of the heat exchanger, potential faults such as disconnection or short circuit of the temperature-sensing package circuit can be discovered in time. Once the temperature-sensing package circuit is detected to be disconnected or short-circuited, the air-conditioning unit is stopped immediately to avoid damage to the compressor due to overheating or overload. Through precise pressure value simulation and output frequency adjustment, the refrigeration and air-conditioning system can operate more stably, which helps to reduce fluctuations in the air-conditioning system and improve the reliability and stability of the overall operation.

[0056] Further, adjusting the output frequency of the currently running compressor based on the first simulated pressure temperature includes:

[0057] Determine a temperature threshold, the temperature threshold comprising a first temperature threshold, a second temperature threshold, and a third temperature threshold that increase in sequence;

[0058] When the first simulated pressure temperature is greater than a first temperature threshold and less than a second temperature threshold, limiting the increase in the output frequency of the compressor;

[0059] When the first simulated pressure temperature is greater than the second temperature threshold and less than the third temperature threshold, adjusting the output frequency of the compressor based on the first frequency adjustment step;

[0060] When the first simulated pressure temperature is greater than a third temperature threshold, adjusting the output frequency of the compressor based on a second frequency adjustment step; wherein the second frequency adjustment step is greater than the first frequency adjustment step;

[0061] When the first simulated pressure temperature is less than the first temperature threshold, the output frequency of the compressor is restored.

[0062] In this embodiment, based on the set first simulated pressure temperature Tci, the output frequency of the currently operating compressor is adjusted. Three sequentially increasing temperature thresholds are set, namely the first temperature threshold A1, the second temperature threshold B1, and the third temperature threshold C1. In this embodiment, the first temperature threshold A1 is set to 52 degrees, the second temperature threshold B1 is set to 55 degrees, and the third temperature threshold C1 is set to 58 degrees. When A1 < Tci < B1, the increase in the output frequency of the compressor is restricted to prevent the pressure of the air conditioning system from rising further. When B1 < Tci < C1, the output frequency of the compressor is adjusted according to the first frequency adjustment step. In this embodiment, the first frequency adjustment step is set to decrease the compressor output frequency by 2HZ every 40 seconds to further reduce the pressure of the air conditioning system. When Tci > C1, the output frequency of the compressor is adjusted according to the second frequency adjustment step. In this embodiment, the second frequency adjustment step is set to decrease the compressor output frequency by 4HZ every 40 seconds to more quickly reduce the pressure of the air conditioning system. When Tci < A1, the normal output frequency of the compressor is restored to ensure the normal operation of the air conditioning system. While performing the above adjustments, the air conditioning system continuously monitors the status of the temperature sensing bulb circuit of the heat exchanger. If the status of the temperature sensing bulb circuit is open or short-circuited, the air conditioning unit is immediately stopped to avoid abnormalities in the air conditioning system caused by sensor failures.

[0063] In the above embodiment, by setting multiple temperature thresholds and performing segmented adjustment of the output frequency of the compressor according to the temperature thresholds, it can be ensured that the compressor can operate with a higher energy efficiency ratio under a wider range of operating conditions. When the first simulated pressure temperature is in a lower or moderate range, restricting or slowly reducing the output frequency of the compressor can avoid excessive refrigeration and energy consumption waste. When the first simulated pressure temperature is high, by adjusting the output frequency of the compressor with a faster second frequency adjustment step, the temperature of the air conditioning system can be quickly reduced, improving the response speed and adjustment ability of the air conditioning system. The segmented adjustment strategy enables the air conditioning system to quickly adjust its working state according to actual needs, improving the overall operating flexibility and stability. By finely adjusting the output frequency of the compressor, it is possible to avoid the compressor operating at high or low loads for a long time, thereby reducing the likelihood of wear and failures. When the first simulated pressure temperature is in an extreme range, appropriate adjustment strategies can protect the compressor from damage and extend its service life. Finely adjusting the output frequency of the compressor can ensure the stability and uniformity of the indoor temperature, improving the comfort and satisfaction of users. By avoiding excessive refrigeration or heating, the fluctuations and discomfort of the indoor temperature can be reduced.

[0064] Further, simulating the pressure value according to the average middle pipe temperature to determine the second simulated pressure temperature and adjusting the output frequency of the compressor based on the second simulated pressure temperature includes:

[0065] Calculating the average middle pipe temperature of all the indoor units that are turned on in the air conditioning unit;

[0066] Determining a first simulation temperature and a second simulation temperature based on the average middle tube temperature, the first simulation temperature being greater than the second simulation temperature;

[0067] Performing pressure value simulation based on the first simulation temperature within a preset time after the compressor is successfully started;

[0068] After a preset time when the compressor is successfully started, simulating a pressure value based on a second simulated temperature;

[0069] The output frequency of the compressor is adjusted according to the second simulated temperature.

[0070] In this embodiment, first determine whether all the indoor units of the air-conditioning unit in the heating state have abnormal middle tube temperature. The determination conditions of abnormal middle tube temperature include condition 1, condition 2 and condition 3. When one of condition 1, condition 2 and condition 3 is met, it is determined that the middle tube temperature is abnormal, and the corresponding indoor unit does not participate in the calculation of the average middle tube temperature. In this embodiment, condition 1 is set as: middle tube temperature < inlet tube temperature - 2; condition 2 is set as: middle tube temperature < -20 degrees and inlet tube temperature > 70 degrees; condition 3 is set as: the middle tube temperature sensing package is broken or open. Assuming that there are n indoor units in the air-conditioning unit, the average middle tube temperature Ti_mid_avg is calculated based on the middle tube temperature of n indoor units, and Ti_mid_avg = (Ti_mid1 + Ti_mid2 + ... + Ti_midn) / n, where Ti_mid1 represents the middle tube temperature of indoor unit 1, Ti_mid2 represents the middle tube temperature of indoor unit 2, Ti_mid3 represents the middle tube temperature of indoor unit 3, and Ti_midn represents the middle tube temperature of indoor unit n. During heating operation, there are indoor units in the air-conditioning unit that are not turned on or shut down at a certain temperature point, so there will be a certain amount of refrigerant flowing. The inlet and outlet temperatures of these indoor units have a relatively large impact on the system pressure. When there are indoor units that are turned off or shut down at a certain temperature point, the average value of the inlet and outlet pipe temperatures is calculated to simulate the simulated pressure value after a short period of operation. Based on the average middle pipe temperature Ti_mid_avg, the first simulated temperature Tci1 = Ti_mid_avg + 10 is calculated, and based on the average middle pipe temperature, the second simulated temperature Tci2 = Ti_mid_avg + 3 is calculated. Within 3 minutes after the compressor is successfully started, the pressure and temperature simulation is performed according to the first simulated temperature Tci1; 3 minutes after the compressor is successfully started, the pressure and temperature simulation is performed according to the second simulated temperature Tci2.

[0071] In the above implementation, by detecting the average middle tube temperature of all the powered-on indoor units of the air-conditioning unit, the current overall working state of the heating air-conditioning system can be obtained. By simulating the pressure value based on the average middle tube temperature, the pressure requirements of the air-conditioning system at different stages can be more accurately understood. By adjusting the compressor output frequency according to the simulation results, it is possible to ensure that the compressor operates under the best working conditions, thereby improving the heating efficiency. By calculating the average middle tube temperature and simulating the pressure value based on it, the impact on the entire air-conditioning system caused by abnormal temperature of individual indoor units can be reduced, which helps to balance the heating requirements of each indoor unit and improve the overall stability and reliability of the air-conditioning system. Within the preset time of successful startup of the compressor, the pressure value simulation is performed based on the higher first simulation temperature, which can ensure that the compressor obtains sufficient cooling and lubrication during the startup phase. After the preset time, the pressure value simulation is switched to the lower second simulation temperature, and the compressor output frequency is adjusted accordingly, which can avoid damage to the compressor due to overheating or overloading. By finely adjusting the output frequency of the compressor, it is possible to ensure that the air-conditioning system can meet the heating requirements while reducing energy consumption as much as possible, which helps to reduce unnecessary energy waste and improve the energy efficiency ratio of the air-conditioning system.

[0072] Further, adjusting the output frequency of the compressor according to the second simulated temperature includes:

[0073] Set the target pressure and temperature value;

[0074] When the second simulated temperature is lower than the target pressure-temperature value, increasing the output frequency of the compressor;

[0075] When the second simulated temperature is higher than the target pressure-temperature value, reducing the output frequency of the compressor;

[0076] Synchronously, the output frequency of the compressor is adjusted according to the magnitude relationship between the second simulated temperature and the temperature threshold.

[0077] In this embodiment, the target pressure-temperature value of the current air-conditioning system is set to T-Tar. When the second simulated temperature value Tci2 is lower than the target pressure-temperature value T-Tar, the current compressor frequency is increased; when the second simulated temperature value Tci2 is greater than the target pressure-temperature value T-Tar, the current compressor frequency is reduced; the pressure of the entire air-conditioning system is maintained near the target value of the air-conditioning system; synchronously, the output frequency of the compressor is adjusted according to the relationship between the second simulated temperature value Tci2 and the temperature threshold.

[0078] In the above-mentioned implementation, by setting the target pressure-temperature value, the heating effect of the heating air-conditioning system can be accurately controlled to meet the preset indoor temperature requirements. When the second simulated temperature is lower than the target pressure-temperature value, increasing the output frequency of the compressor can quickly improve the heating effect and ensure that the indoor temperature reaches the set value. When the second simulated temperature is higher than the target pressure-temperature value, reducing the output frequency of the compressor can avoid excessive heating and improve the energy efficiency ratio. The dual adjustment strategy enables the air-conditioning system to respond quickly according to changes in the second simulated temperature and adjust the output frequency of the compressor, thereby maintaining the stability and reliability of the operation of the air-conditioning system. By considering the target pressure-temperature value and the temperature threshold at the same time, the working state of the air-conditioning system can be adjusted more flexibly to adapt to different heating requirements and environmental conditions.

[0079] Further, adjusting the output frequency of the compressor according to the magnitude relationship between the second simulated temperature and the temperature threshold comprises:

[0080] Determine a temperature threshold, the temperature threshold comprising a first temperature threshold, a second temperature threshold, and a third temperature threshold that increase in sequence;

[0081] If the second simulated temperature is greater than the first temperature threshold and less than the second temperature threshold, limiting the increase of the current output frequency of the compressor;

[0082] If the second simulation temperature is greater than the second temperature threshold and less than the third temperature threshold, setting a first frequency adjustment step of the output frequency of the compressor;

[0083] If the second simulated temperature is greater than the third temperature threshold, a second frequency adjustment step length of the output frequency of the compressor is set, and the second frequency adjustment step length is greater than the first frequency adjustment step length;

[0084] If the second simulated temperature is less than the first temperature threshold, the output frequency of the compressor is restored.

[0085] In this embodiment, three gradually increasing temperature thresholds are first set, namely the first temperature threshold A2, the second temperature threshold B2, and the third temperature threshold C2. In this embodiment, the first temperature threshold A2 is set to 52 degrees, the second temperature threshold B2 is set to 55 degrees, and the third temperature threshold C2 is set to 58 degrees. Determine the magnitude relationship between the second simulated temperature and the first temperature threshold A2, the second temperature threshold B2, and the third temperature threshold C2. When A2 < Tci2 < B2, limit the increase in the output frequency of the compressor to avoid further increase in the pressure of the air-conditioning system. When B2 < Tci2 < C2, adjust the output frequency of the compressor according to the first frequency adjustment step. In this embodiment, the first frequency adjustment step is set to decrease the output frequency of the compressor by 2HZ every 40 seconds to further reduce the pressure of the air-conditioning system. When Tci2 > C2, adjust the output frequency of the compressor according to the second frequency adjustment step. In this embodiment, the second frequency adjustment step is set to decrease the output frequency of the compressor by 4HZ every 40 seconds to more quickly reduce the pressure of the air-conditioning system. When Tci2 < A2, restore the normal output frequency of the compressor to ensure the normal operation of the air-conditioning system.

[0086] In the above embodiment, by setting multiple temperature thresholds and performing segmented adjustment according to the second simulated temperature, the air-conditioning system can more flexibly respond to changes in the heating demand. When the second simulated temperature is within different temperature threshold ranges, the air-conditioning system can adopt different adjustment strategies to adapt to different heating demands and environmental conditions. When the second simulated temperature is moderate, restricting the increase in the current output frequency of the compressor can prevent the compressor from overworking, reducing energy consumption and wear. When the second simulated temperature is high, by setting different decreasing rates, the output frequency of the compressor can be gradually reduced to ensure that the air-conditioning system operates at a high energy efficiency ratio. The segmented adjustment strategy helps to keep the compressor operating under the best working conditions and extend its service life. By precisely controlling the output frequency of the compressor, the stability and uniformity of the indoor temperature can be maintained, avoiding overheating or insufficient heating, reducing the fluctuations and discomfort of the indoor temperature, and improving the user experience. The segmented adjustment strategy enables the air-conditioning system to quickly respond to changes in the second simulated temperature and adjust the output frequency of the compressor, which helps to maintain the stability and reliability of the air-conditioning system and reduce the likelihood of failures.

[0087] Further, based on the temperature of the inlet pipe and the outlet pipe of the indoor unit, simulate the pressure value to determine the third simulated pressure temperature and adjust the output frequency of the compressor based on the third simulated pressure temperature, including:

[0088] Determine the initial running time of the air-conditioning unit;

[0089] During the initial running time of the air-conditioning unit, simulate the pressure value according to the average middle pipe temperature of the indoor unit and adjust the output frequency of the compressor;

[0090] After the initial operation time of the air-conditioning unit, if there is an indoor unit that is shut down or stopped at a temperature point, a pressure value simulation is performed according to the inlet pipe temperature combined with the outlet pipe temperature to determine a third simulated pressure temperature, and the output frequency of the compressor is adjusted based on the third simulated pressure temperature;

[0091] If there is no indoor unit that is shut down or stopped at a temperature point, a pressure value simulation is performed according to the average middle pipe temperature of the indoor unit to determine a third simulated pressure temperature and the output frequency of the compressor is adjusted based on the third simulated pressure temperature.

[0092] In this embodiment, when all the indoor units of the air-conditioning unit have abnormal middle pipe temperature, the pressure value simulation is performed according to the inlet pipe temperature and outlet pipe temperature of the indoor unit, and the initial operation time of the air-conditioning unit is set to 10 minutes. The air-conditioning unit performs pressure value simulation and adjusts the output frequency of the compressor according to the average middle pipe temperature of the indoor unit in the first 10 minutes of operation. After the air-conditioning unit runs for 10 minutes, it is determined whether there is an indoor unit of the air-conditioning unit that is shut down or shut down at a temperature point. If there is, the pressure value simulation is performed according to the inlet pipe temperature combined with the outlet pipe temperature to determine the third simulated pressure temperature, and the output frequency of the compressor is adjusted based on the third simulated pressure temperature; if there is no indoor unit, the pressure value simulation is performed according to the average middle pipe temperature of the indoor unit to determine the third simulated pressure temperature, and the output frequency of the compressor is adjusted based on the third simulated pressure temperature. Shutdown at temperature point means that when the temperature of the indoor unit continues to rise, in order to avoid the indoor unit from burning out due to excessive temperature, a temperature point is set, and when the temperature of the indoor unit rises to the set temperature point, it automatically shuts down, thereby preventing the indoor unit from burning out. The temperature point setting is reasonably adjusted according to the characteristics of the equipment and operating requirements, which not only ensures the safety of the equipment, but also avoids frequent shutdowns caused by too low shutdown temperature points.

[0093] In the above embodiment, when the temperature of the middle pipe is detected to be abnormal, it is possible to quickly switch to the pressure value simulation based on the inlet pipe temperature and the outlet pipe temperature, so as to more accurately evaluate the actual operating state of the air-conditioning system. It helps the air-conditioning system to respond to abnormal situations in a timely manner and avoid potential failures or performance degradation. During the initial operation time of the air-conditioning unit, the pressure value simulation is performed according to the average middle pipe temperature of the indoor unit and the compressor output frequency is adjusted to ensure the stable operation of the air-conditioning system during the startup phase. After the initial operation time, different pressure value simulation strategies are selected according to the operating state of the indoor unit (whether it is shut down or stopped at a temperature point), which can further optimize the operation of the compressor and improve the energy efficiency ratio. By considering the operating state of the indoor unit, it is possible to avoid unnecessary interference or impact on the entire air-conditioning system when some indoor units are shut down or stopped at a temperature point, which helps to maintain the overall stability and reliability of the air-conditioning system and improve the user experience. By accurately adjusting the output frequency of the compressor, it is possible to avoid the compressor from running under high load or low load for a long time, thereby reducing the occurrence of wear and failure. It helps to extend the service life of the compressor and reduce maintenance costs. Optimizing the compressor operation strategy can not only improve the heating efficiency of the air-conditioning system, but also reduce energy consumption and emissions, which helps to improve the energy efficiency ratio and environmental performance of the air-conditioning unit, and is in line with the current trend and requirements of energy conservation and emission reduction.

[0094] Furthermore, the pressure value is simulated and the output frequency of the compressor is adjusted according to the average middle pipe temperature of the internal machine, including:

[0095] Calculate the average middle tube temperature of all internal machines and set the initial simulation pressure temperature based on the average middle tube temperature of the internal machines;

[0096] Determine a target pressure-temperature value, and if the initial simulated pressure-temperature is lower than the target pressure-temperature value, increase the output frequency of the current compressor;

[0097] If the initial simulated pressure temperature is higher than the target pressure temperature value, the output frequency of the current compressor is reduced;

[0098] Synchronously, the output frequency of the compressor is adjusted according to the magnitude relationship between the initial simulated pressure temperature and the temperature threshold.

[0099] In this embodiment, firstly, the average tube temperature Ti_Avg of all indoor units of the air-conditioning unit is calculated = (the inlet tube temperature of all indoor units + the outlet tube temperature of all indoor units) / 2m, where m is the number of indoor units); the initial simulated pressure temperature Tci_I is calculated according to the average tube temperature Ti_Avg, and Tci_I = Ti_Avg + 10. The pressure value is simulated according to the initial simulated pressure temperature Tci_I, and the output frequency of the compressor is further adjusted, and the current target pressure temperature value is set to T-Tar. When the initial simulated pressure temperature Tci_I is lower than the target pressure temperature value T-Tar, the output frequency of the current compressor is increased; when the initial simulated pressure temperature Tci_I is greater than the target pressure temperature value T-Tar, the output frequency of the current compressor is reduced to adjust the pressure of the entire air-conditioning system to maintain near the target value of the air-conditioning system. Simultaneously, the output frequency of the compressor is adjusted according to the size relationship between the initial simulated pressure temperature Tci_I and the temperature threshold.

[0100] In the above embodiment, by calculating the average middle tube temperature of all indoor units, the overall heating state of the air-conditioning system can be more accurately reflected. The initial simulated pressure temperature set based on the average middle tube temperature can more accurately guide the adjustment of the compressor output frequency, thereby improving the heating efficiency of the air-conditioning system. When the initial simulated pressure temperature is lower than the target pressure temperature value, increasing the compressor output frequency can quickly improve the heating effect. When the initial simulated pressure temperature is higher than the target pressure temperature value, reducing the compressor output frequency can avoid excessive heating and improve the energy efficiency ratio. This strategy of dynamically adjusting the compressor output frequency according to the temperature difference helps to keep the air-conditioning system running under optimal conditions. By simultaneously considering the relationship between the initial simulated pressure temperature and the target pressure temperature value and the temperature threshold, the working state of the compressor can be adjusted more flexibly. This dual adjustment mechanism helps to maintain the stability and reliability of the air-conditioning system and reduce failures or performance degradation caused by temperature fluctuations or anomalies. Accurately adjusting the compressor output frequency can avoid the compressor from running under high load or low load for a long time, which helps to reduce the wear and failure of the compressor, thereby extending its service life.

[0101] Further, adjusting the output frequency of the compressor according to the magnitude relationship between the initial simulated pressure temperature and the temperature threshold comprises:

[0102] Determine a temperature threshold, the temperature threshold comprising a first temperature threshold, a second temperature threshold, and a third temperature threshold that increase in sequence;

[0103] When the initial simulated pressure temperature is greater than a first temperature threshold and less than a second temperature threshold, limiting the increase in the output frequency of the compressor;

[0104] When the initial simulated pressure temperature is greater than the second temperature threshold and less than the third temperature threshold, adjust the output frequency of the compressor based on the first frequency adjustment step;

[0105] When the initial simulated pressure temperature is greater than the third temperature threshold, adjust the output frequency of the compressor based on the second frequency adjustment step; where the second frequency adjustment step is greater than the first frequency adjustment step;

[0106] When the initial simulated pressure temperature is less than the first temperature threshold, restore the output frequency of the compressor.

[0107] In this embodiment, first set three sequentially increasing temperature thresholds, the first temperature threshold A3, the second temperature threshold B3, and the third temperature threshold C3. In this embodiment, the first temperature threshold A3 is set to 53 degrees, the second temperature threshold B3 is set to 55 degrees, and the third temperature threshold C3 is set to 58 degrees. Determine the magnitude relationship between the initial simulated pressure temperature Tci_I and the first temperature threshold A3, the second temperature threshold B3, and the third temperature threshold C3. When A3 < Tci_I < B3, limit the increase in the output frequency of the compressor to avoid further increase in the air-conditioning system pressure. When B3 < Tci_I < C3, adjust the output frequency of the compressor according to the first frequency adjustment step. The first frequency adjustment step in this embodiment is set to decrease the compressor output frequency by 3HZ every 40 seconds to further reduce the air-conditioning system pressure. When Tci_I > C3, adjust the output frequency of the compressor according to the second frequency adjustment step. The second frequency adjustment step in this embodiment is set to decrease the compressor output frequency by 4HZ every 40 seconds to more quickly reduce the air-conditioning system pressure. When Tci_I < A3, restore the normal output frequency of the compressor to ensure the normal operation of the air-conditioning system.

[0108] In the above embodiment, by setting multiple temperature thresholds, the air conditioning system can adopt different adjustment strategies according to different ranges of the initial simulated pressure temperature. This segmented adjustment mechanism enables the air conditioning system to respond to changes in heating demand more flexibly, improve response speed and adjustment accuracy. When the initial simulated pressure temperature is in a moderate range (greater than the first temperature threshold and less than the second temperature threshold), limiting the increase in the output frequency of the compressor can avoid excessive work of the compressor and reduce energy consumption and wear. When the initial simulated pressure temperature is high (greater than the second temperature threshold), by setting different drop rates (first frequency adjustment step and second frequency adjustment step), the output frequency of the compressor can be gradually reduced to ensure that the air conditioning system operates with a higher energy efficiency ratio. The second frequency adjustment step is larger than the first frequency adjustment step. In extremely high temperature conditions, the air conditioning system can reduce the compressor output frequency faster to cope with changes in heating demand. By accurately adjusting the output frequency of the compressor, the compressor can be prevented from running under high load for a long time, thereby reducing failures and wear, helping to protect the compressor, extending its service life, and reducing maintenance costs. By optimizing the compressor operation strategy, the stability and uniformity of the indoor temperature can be maintained, which helps to reduce the fluctuation and discomfort of the indoor temperature and improve the user experience and satisfaction. The segmented regulation strategy enables the air-conditioning system to respond quickly to changes in the initial simulated pressure and temperature and adjust the output frequency of the compressor, which helps to maintain the stability and reliability of the air-conditioning system and reduce failures or performance degradation caused by temperature fluctuations or anomalies.

[0109] Further, a pressure value simulation is performed according to the inlet pipe temperature in combination with the outlet pipe temperature to determine a third simulated pressure temperature, and the output frequency of the compressor is adjusted based on the third simulated pressure temperature, including:

[0110] Calculate the third simulated pressure temperature according to the inlet pipe temperature and the outlet pipe temperature;

[0111] Determine a target pressure-temperature value, and if the third simulated pressure-temperature is lower than the target pressure-temperature value, increase the output frequency of the current compressor;

[0112] If the third simulated pressure temperature is higher than the target pressure temperature value, reducing the output frequency of the current compressor;

[0113] Synchronously, the output frequency of the compressor is adjusted according to the magnitude relationship between the third simulated pressure temperature and the temperature threshold.

[0114] In this embodiment, when there are indoor units that are shut down or stopped at a temperature point, if the outlet pipe temperature - inlet pipe temperature of the indoor units that are shut down or stopped at a temperature point is less than 10 degrees, the average inlet and outlet pipe temperature TiS_Avg is calculated based on the inlet and outlet pipe temperatures of this part of the indoor units. The average inlet and outlet pipe temperature TiS_Avg = (inlet pipe temperature of all indoor units + outlet pipe temperature of all indoor units) / 2n (n is the number of indoor units that are shut down or stopped at a temperature point and meet the condition that the outlet pipe temperature - inlet pipe temperature < 10). g performs pressure value simulation to obtain the third simulated pressure temperature Tci3=TiS_Avg+3, and further adjusts the output frequency of the compressor, sets the current target pressure temperature value to T-Tar, and when the third simulated pressure temperature Tci3 is lower than the target pressure temperature value T-Tar, increases the output frequency of the current compressor; when the third simulated pressure temperature Tci3 is greater than the target pressure temperature value T-Tar, reduces the output frequency of the current compressor; so as to adjust the pressure of the entire air-conditioning system to maintain it near the target value of the air-conditioning system.

[0115] In the above-mentioned embodiment, the pressure value simulation is performed in combination with the inlet pipe temperature and the outlet pipe temperature, which can more accurately reflect the actual heating state of the air-conditioning system. Based on this more accurate simulation result, the output frequency of the compressor is adjusted, which can significantly improve the adjustment accuracy of the air-conditioning system and ensure the stability and uniformity of the indoor temperature. When the third simulated pressure temperature is lower than the target pressure temperature value, increasing the output frequency of the compressor can quickly improve the heating effect. When the third simulated pressure temperature is higher than the target pressure temperature value, reducing the output frequency of the compressor can avoid excessive heating and improve the energy efficiency ratio. This strategy of dynamically adjusting the output frequency of the compressor according to the temperature difference helps to keep the air-conditioning system running under the best working conditions. By calculating the third simulated pressure temperature in real time and adjusting the output frequency of the compressor according to the relationship between the temperature and the target pressure temperature value and the temperature threshold, the air-conditioning system can respond to changes in heating demand more quickly, making the air-conditioning system more flexible and able to adapt to heating needs under different working conditions. Accurately adjusting the output frequency of the compressor can avoid the compressor from running under high load or low load for a long time, which helps to reduce the wear and failure of the compressor, thereby extending its service life and reducing maintenance costs. By optimizing the compressor operation strategy, the indoor temperature can be kept stable and uniform, and the discomfort caused by temperature fluctuations can be reduced. This helps improve the user experience and satisfaction, and enhances the user's trust and reliance on the air-conditioning system. Real-time calculation of the third simulated pressure temperature and adjustment of the compressor output frequency based on the third simulated pressure temperature help maintain the stability and reliability of the air-conditioning system, reduce failures or performance degradation caused by temperature fluctuations or anomalies, and improve the overall operating efficiency of the air-conditioning system.

[0116] Further, adjusting the output frequency of the compressor according to the magnitude relationship between the third simulated pressure temperature and the temperature threshold includes:

[0117] Determine the temperature threshold, which includes a first temperature threshold, a second temperature threshold, and a third temperature threshold that increase in sequence;

[0118] When the third simulated pressure temperature is greater than the first temperature threshold and less than the second temperature threshold, limit the increase in the output frequency of the compressor;

[0119] When the third simulated pressure temperature is greater than the second temperature threshold and less than the third temperature threshold, adjust the output frequency of the compressor based on the first frequency adjustment step;

[0120] When the third simulated pressure temperature is greater than the third temperature threshold, adjust the output frequency of the compressor based on the second frequency adjustment step; wherein, the second frequency adjustment step is greater than the first frequency adjustment step;

[0121] When the third simulated pressure temperature is less than the first temperature threshold, restore the output frequency of the compressor.

[0122] In this embodiment, first, set three temperature thresholds that increase in sequence, namely the first temperature threshold A4, the second temperature threshold B4, and the third temperature threshold C4. In this embodiment, the first temperature threshold A4 is set to 54 degrees, the second temperature threshold B4 is set to 55 degrees, and the third temperature threshold C4 is set to 58 degrees. Determine the magnitude relationship between the third simulated pressure temperature Tci3 and the first temperature threshold A4, the second temperature threshold B4, and the third temperature threshold C4. When A4 < Tci3 < B4, limit the increase in the output frequency of the compressor to avoid further increase in the pressure of the air-conditioning system. When B4 < Tci3 < C4, adjust the output frequency of the compressor according to the first frequency adjustment step. The first frequency adjustment step in this embodiment is set to decrease the output frequency of the compressor by 4HZ every 40 seconds to further reduce the pressure of the air-conditioning system. When Tci3 > C4, adjust the output frequency of the compressor according to the second frequency adjustment step. The second frequency adjustment step in this embodiment is set to decrease the output frequency of the compressor by 4HZ every 40 seconds to more quickly reduce the pressure of the air-conditioning system. When Tci3 < A4, restore the normal output frequency of the compressor to ensure the normal operation of the air-conditioning system.

[0123] In the above implementation, by setting multiple temperature thresholds, a more delicate and precise adjustment strategy can be adopted according to different ranges of the third simulated pressure temperature. This segmented adjustment mechanism enables the air-conditioning system to respond more accurately to changes in heating demand and improve the accuracy and stability of the adjustment. When the third simulated pressure temperature is in a moderate range (greater than the first temperature threshold and less than the second temperature threshold), the output frequency of the compressor is limited to rise, which can avoid excessive work of the compressor and reduce energy consumption and wear. When the third simulated pressure temperature is high (greater than the second temperature threshold), by setting different drop rates (first frequency adjustment step and second frequency adjustment step), the output frequency of the compressor can be gradually reduced to ensure that the air-conditioning system operates with a higher energy efficiency ratio. The second frequency adjustment step is larger than the first frequency adjustment step. In extremely high temperature conditions, the air-conditioning system can reduce the compressor output frequency faster to cope with changes in heating demand and further improve the energy efficiency ratio. The segmented adjustment strategy enables the air-conditioning system to respond quickly to changes in the third simulated pressure temperature and adjust the output frequency of the compressor. This adjustment mechanism enhances the responsiveness and flexibility of the air-conditioning system, so that the air-conditioning system can better adapt to heating needs under different working conditions. By precisely adjusting the compressor output frequency, the compressor can be prevented from running under high load for a long time, thereby reducing failures and wear, helping to protect the compressor, extending its service life, and reducing maintenance costs. By optimizing the compressor operation strategy, the stability and uniformity of the indoor temperature can be maintained, reducing the discomfort caused by temperature fluctuations, helping to improve the user experience and satisfaction, and enhancing the user's trust and reliance on the air conditioning system. The segmented adjustment strategy enables the air conditioning system to be adjusted smoothly according to the changes in the third simulated pressure temperature, avoiding excessive shocks or fluctuations, helping to maintain the stability and reliability of the air conditioning system, and reducing failures or performance degradation caused by temperature fluctuations or anomalies.

[0124] According to another aspect of the embodiment of the present application, Figure 5 As shown, the present application provides an air conditioning pressure control device, comprising:

[0125] The state determination module 301 is used to determine the operating state of the air conditioning unit;

[0126] The simulation adjustment module 303 is used to simulate the pressure value of the air-conditioning unit according to the operating state and the temperature of the air-conditioning unit, and adjust the output frequency of the corresponding compressor according to the pressure value simulation result.

[0127] It should be noted that the state judgment module 301 in this embodiment can be used to execute step S202 in the embodiment of the present application, and the analog adjustment module 303 in this embodiment can be used to execute step S204 in the embodiment of the present application.

[0128] It should be noted that the examples and application scenarios implemented by the above modules and corresponding steps are the same, but are not limited to the contents disclosed in the above embodiments. It should be noted that the above modules as part of the device can be run in Figure 1 In the hardware environment shown, it can be implemented by software or by hardware.

[0129] According to another aspect of the embodiments of the present application, the present application provides an electronic device, such as Figure 6 As shown, it includes a memory 401, a processor 403, a communication interface 405 and a communication bus 407. The memory 401 stores a computer program that can be run on the processor 403. The memory 401 and the processor 403 communicate through the communication interface 405 and the communication bus 407. When the processor 403 executes the computer program, the steps of the above method are implemented.

[0130] The memory and processor in the above electronic device communicate through the communication bus and the communication interface. The communication bus can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The communication bus can be divided into an address bus, a data bus, a control bus, etc.

[0131] The memory may include a random access memory (RAM) or a non-volatile memory, such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

[0132] 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.

[0133] According to another aspect of the embodiments of the present application, a computer program product or a computer program is provided, 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 performs the steps of any of the above embodiments.

[0134] Optionally, in an embodiment of the present application, the computer-readable medium is configured to store program codes for the processor to execute the following steps:

[0135] Step S202, determining the operating status of the air conditioning unit;

[0136] Step S204, simulating the pressure value of the air-conditioning unit according to the operating state and the temperature of the air-conditioning unit, and adjusting the output frequency of the corresponding compressor according to the pressure value simulation result.

[0137] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0138] When the embodiments of the present application are specifically implemented, reference may be made to the above-mentioned embodiments, which have corresponding technical effects.

[0139] It is understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit may be implemented in one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions of the present application, or a combination thereof.

[0140] For software implementation, the technology of this article can be implemented by a unit that performs the functions of this article. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or outside the processor.

[0141] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0142] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the air-conditioning systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0143] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another air-conditioning system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0144] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0145] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0146] If the 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 such an understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk. It should be noted that, in this article, 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 that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such a process, method, article or device. Without more constraints, an element defined by the phrase "comprising a ..." does not exclude the existence of other identical elements in the process, method, article or apparatus comprising the element.

[0147] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent 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 the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for controlling air conditioning pressure, It is characterized in that include: Determine the operating status of the air conditioning unit; The pressure value of the air-conditioning unit is simulated according to the operating state and the temperature of the air-conditioning unit, and the output frequency of the corresponding compressor is adjusted according to the pressure value simulation result.

2. The air conditioning pressure control method according to claim 1, It is characterized in that The step of simulating the pressure value of the air-conditioning unit according to the operating state and the temperature of the air-conditioning unit, and adjusting the output frequency of the corresponding compressor according to the pressure value simulation result, comprises: Acquire the temperature of the air-conditioning unit, including the heat exchanger temperature, the middle pipe temperature, the inlet pipe temperature and the outlet pipe temperature; if the operating state of the air-conditioning unit is the cooling state, simulate the pressure value of the air-conditioning unit according to the heat exchanger temperature to determine the first simulated pressure temperature and adjust the output frequency of the compressor based on the first simulated pressure temperature; If the operation state of the air-conditioning unit is the heating state, then detecting whether there is an abnormal middle pipe temperature in all indoor units of the air-conditioning unit; if there is no abnormal middle pipe temperature, performing pressure value simulation according to the average middle pipe temperature to determine a second simulated pressure temperature and adjusting the output frequency of the compressor based on the second simulated pressure temperature; If there is an abnormal temperature in the middle pipe, a pressure value simulation is performed according to the inlet pipe temperature and the outlet pipe temperature of the indoor unit to determine a third simulated pressure temperature, and the output frequency of the compressor is adjusted based on the third simulated pressure temperature.

3. The air conditioning pressure control method according to claim 2, It is characterized in that The method of simulating the pressure value of the air-conditioning unit according to the temperature of the heat exchanger to determine a first simulated pressure temperature and adjusting the output frequency of the compressor based on the first simulated pressure temperature includes: Obtain the temperature value of the heat exchanger corresponding to the air-conditioning unit in the cooling state; Setting the temperature value of the heat exchanger to the first simulated pressure temperature of the currently running compressor; adjusting the output frequency of the currently running compressor based on the first simulated pressure temperature; Check the status of the temperature-sensing package circuit of the heat exchanger. If the temperature-sensing package circuit is disconnected or short-circuited, stop running the air-conditioning unit.

4. The air conditioning pressure control method according to claim 3, It is characterized in that The step of adjusting the output frequency of the currently running compressor based on the first simulated pressure temperature comprises: Determine a temperature threshold, wherein the temperature threshold includes a first temperature threshold, a second temperature threshold, and a third temperature threshold that increase in sequence; When the first simulated pressure temperature is greater than the first temperature threshold and less than the second temperature threshold, limiting the increase in the output frequency of the compressor; When the first simulated pressure temperature is greater than the second temperature threshold and less than the third temperature threshold, adjusting the output frequency of the compressor based on a first frequency adjustment step; When the first simulated pressure temperature is greater than the third temperature threshold, adjusting the output frequency of the compressor based on a second frequency adjustment step; wherein the second frequency adjustment step is greater than the first frequency adjustment step; When the first simulated pressure temperature is less than the first temperature threshold, the output frequency of the compressor is restored.

5. The air conditioning pressure control method according to claim 2, It is characterized in that The method of simulating the pressure value according to the average middle pipe temperature to determine the second simulated pressure temperature and adjusting the output frequency of the compressor based on the second simulated pressure temperature includes: Calculate the average middle tube temperature of all powered-on indoor units of the air-conditioning unit; Determining a first simulation temperature and a second simulation temperature based on the average middle tube temperature, the first simulation temperature being greater than the second simulation temperature; Performing pressure value simulation based on the first simulation temperature within a preset time after the compressor is successfully started; After a preset time when the compressor is successfully started, simulating a pressure value based on the second simulated temperature; The output frequency of the compressor is adjusted according to the second simulated temperature.

6. The air conditioning pressure control method according to claim 5, It is characterized in that The step of adjusting the output frequency of the compressor according to the second simulated temperature comprises: Set the target pressure and temperature value; When the second simulated temperature is lower than the target pressure-temperature value, increasing the output frequency of the compressor; When the second simulated temperature is higher than the target pressure-temperature value, reducing the output frequency of the compressor; Synchronously, the output frequency of the compressor is adjusted according to the magnitude relationship between the second simulated temperature and the temperature threshold.

7. The air conditioning pressure control method according to claim 6, It is characterized in that The adjusting the output frequency of the compressor according to the magnitude relationship between the second simulated temperature and the temperature threshold comprises: Determine a temperature threshold, wherein the temperature threshold includes a first temperature threshold, a second temperature threshold, and a third temperature threshold that increase in sequence; If the second simulated temperature is greater than the first temperature threshold and less than the second temperature threshold, limiting the increase of the current output frequency of the compressor; If the second simulation temperature is greater than the second temperature threshold and less than the third temperature threshold, setting a first frequency adjustment step of the output frequency of the compressor; If the second simulated temperature is greater than the third temperature threshold, setting a second frequency adjustment step length of the output frequency of the compressor, wherein the second frequency adjustment step length is greater than the first frequency adjustment step length; If the second simulated temperature is less than the first temperature threshold, the output frequency of the compressor is restored.

8. The air conditioning pressure control method according to claim 2, It is characterized in that The method of simulating the pressure value according to the inlet pipe temperature and the outlet pipe temperature of the indoor unit to determine the third simulated pressure temperature and adjusting the output frequency of the compressor based on the third simulated pressure temperature includes: Determine the initial operating time of the air conditioning unit; During the initial operation time of the air conditioning unit, the pressure value is simulated and the output frequency of the compressor is adjusted according to the average middle pipe temperature of the indoor unit; After the initial operation time of the air-conditioning unit, if there is an indoor unit that is shut down or stopped at a temperature point, a pressure value simulation is performed according to the inlet pipe temperature combined with the outlet pipe temperature to determine a third simulated pressure temperature, and the output frequency of the compressor is adjusted based on the third simulated pressure temperature; If there is no indoor unit that is shut down or stopped at a temperature point, a pressure value simulation is performed according to the average middle pipe temperature of the indoor unit to determine a third simulated pressure temperature and the output frequency of the compressor is adjusted based on the third simulated pressure temperature.

9. The air conditioning pressure control method according to claim 8, It is characterized in that The method of simulating the pressure value according to the average middle pipe temperature of the internal machine and adjusting the output frequency of the compressor includes: Calculating an average middle tube temperature of all internal machines and setting an initial simulated pressure temperature based on the average middle tube temperature of the internal machines; Determine a target pressure-temperature value, and if the initial simulated pressure-temperature is lower than the target pressure-temperature value, increase the output frequency of the current compressor; If the initial simulated pressure temperature is higher than the target pressure temperature value, reducing the output frequency of the current compressor; Synchronously, the output frequency of the compressor is adjusted according to the magnitude relationship between the initial simulated pressure temperature and the temperature threshold.

10. The air conditioning pressure control method according to claim 9, It is characterized in that The step of adjusting the output frequency of the compressor according to the magnitude relationship between the initial simulated pressure temperature and the temperature threshold comprises: Determine a temperature threshold, wherein the temperature threshold includes a first temperature threshold, a second temperature threshold, and a third temperature threshold that increase in sequence; When the initial simulated pressure temperature is greater than the first temperature threshold and less than the second temperature threshold, limiting the increase in the output frequency of the compressor; When the initial simulated pressure temperature is greater than the second temperature threshold and less than the third temperature threshold, adjusting the output frequency of the compressor based on a first frequency adjustment step; When the initial simulated pressure temperature is greater than the third temperature threshold, adjusting the output frequency of the compressor based on a second frequency adjustment step; wherein the second frequency adjustment step is greater than the first frequency adjustment step; When the initial simulated pressure temperature is less than the first temperature threshold, the output frequency of the compressor is restored.

11. The air conditioning pressure control method according to claim 8, It is characterized in that The method of simulating the pressure value according to the inlet pipe temperature and the outlet pipe temperature to determine the third simulated pressure temperature, and adjusting the output frequency of the compressor based on the third simulated pressure temperature, includes: Calculate the third simulated pressure temperature according to the inlet pipe temperature and the outlet pipe temperature; determining a target pressure-temperature value, and if the third simulated pressure-temperature is lower than the target pressure-temperature value, increasing the output frequency of the current compressor; If the third simulated pressure temperature is higher than the target pressure temperature value, reducing the output frequency of the current compressor; Synchronously, the output frequency of the compressor is adjusted according to the magnitude relationship between the third simulated pressure temperature and the temperature threshold.

12. The air conditioning pressure control method according to claim 11, It is characterized in that The step of adjusting the output frequency of the compressor according to the magnitude relationship between the third simulated pressure temperature and the temperature threshold comprises: Determine a temperature threshold, wherein the temperature threshold includes a first temperature threshold, a second temperature threshold, and a third temperature threshold that increase in sequence; When the third simulated pressure temperature is greater than the first temperature threshold and less than the second temperature threshold, limiting the increase in the output frequency of the compressor; When the third simulated pressure temperature is greater than the second temperature threshold and less than the third temperature threshold, adjusting the output frequency of the compressor based on the first frequency adjustment step; When the third simulated pressure temperature is greater than the third temperature threshold, adjusting the output frequency of the compressor based on a second frequency adjustment step; wherein the second frequency adjustment step is greater than the first frequency adjustment step; When the third simulated pressure temperature is less than the first temperature threshold, the output frequency of the compressor is restored.

13. An air conditioning pressure control device, applicable to the air conditioning pressure control method according to any one of claims 1 to 12, It is characterized in that include: A status judgment module is used to determine the operating status of the air conditioning unit; The simulation adjustment module simulates the pressure value of the air-conditioning unit according to the operating state and the temperature of the air-conditioning unit, and adjusts the output frequency of the corresponding compressor according to the pressure value simulation result.

14. An electronic device 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 via the communication bus and the communication interface. It is characterized in that When the processor executes the computer program, the processor implements the instructions of the air conditioning pressure control method described in any one of 1-12 above.

15. A readable storage medium storing program instructions, which, when read and executed by a computing device, enables the computing device to execute the air conditioning pressure control method according to any one of claims 1 to 12.

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