Air conditioning system

Abstract

The invention provides an air conditioning system. The air conditioning system comprises an outdoor unit, an air cooling module and a water module. Wherein the outdoor unit comprises a compressor, an air cooling module heat exchanger and an air cooling module electronic expansion valve are arranged in the air cooling module, and the outdoor unit and the air cooling module are connected through an air pipe, a liquid pipe and a high-low pressure air pipe; the water module is connected with the outdoor unit through a gas side branch and a liquid side branch; the device further comprises an air pipe adjusting valve and a high-low pressure air pipe adjusting valve. The air pipe adjusting valve is arranged on the air pipe; the high-low pressure air pipe adjusting valve is arranged on the high-low pressure air pipe; the processing device is configured to adjust the opening degree of the air pipe adjusting valve and the opening degree of the high-low pressure air pipe adjusting valve from the preset opening degree until the exhaust pressure of the compressor does not deviate from the preset exhaust pressure interval under the conditions that only the water module operates in a heating mode and the exhaust pressure of the compressor deviates from the preset exhaust pressure interval. According to the invention, excessive or too little refrigerant is prevented from entering the water module, and the refrigerating or heating efficiency of the air conditioning system is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to an air conditioning system. Background Technology

[0002] A three-pipe air conditioning system is a configuration of a variable frequency multi-split air conditioning system, where multiple indoor units can be independently controlled and serve different rooms or areas. The main characteristic of a three-pipe system is that it uses three pipes to connect the indoor and outdoor units. These three pipes include a gas pipe, a liquid pipe, and high- and low-pressure gas pipes. The gas pipe is used to transport gaseous refrigerant, the liquid pipe is used to transport liquid refrigerant, and the high- and low-pressure gas pipes, depending on the operating mode and conditions of the air conditioning system, can transport either high-pressure or low-pressure gaseous refrigerant.

[0003] The refrigerant charge for the air conditioning system is calculated based on the cooling capacity and performance data of the selected refrigerant. A certain margin is also considered to ensure normal operation under extreme conditions. However, due to differences in the heat exchange medium (water or air) and operating conditions of the various indoor units, uneven refrigerant distribution can easily occur during operation. This is especially true when only the indoor units exchanging heat with water (hereinafter referred to as "water modules") are heating; other indoor units exchanging heat with air receive a larger amount of refrigerant, resulting in insufficient heating capacity of the water modules and preventing them from reaching the desired set temperature within the expected time.

[0004] To address this issue, existing technology involves adding a solenoid valve to the gas pipe. When the water module is operating independently for heating, this valve is closed to prevent refrigerant from flowing into other indoor units that exchange heat with the air, thus reducing the refrigerant levels in those units. However, in this scenario, the refrigerant circulates only within the water module, making it difficult to avoid excessive refrigerant circulation. Excessive circulation leads to higher overall system pressure. Because the air conditioning system has a high-pressure protection program, the compressor automatically reduces its operating frequency when the overall system pressure is too high, further reducing heat output and causing fluctuations in indoor temperature. In severe cases, this can even lead to system shutdown and unstable operation. Summary of the Invention

[0005] The purpose of this invention is to provide an air conditioning system that avoids the problem of excessive or insufficient refrigerant circulation during water-only heating operation, which can lead to system malfunctions.

[0006] In one or more embodiments of this application, the air conditioning system includes an outdoor unit, an air-cooled module, and a water module; wherein, the outdoor unit includes a compressor, the air-cooled module is provided with an air-cooled module heat exchanger, the air-cooled module heat exchanger is correspondingly provided with an air-cooled module electronic expansion valve, and the outdoor unit and the air-cooled module are connected by gas pipes, liquid pipes, and high and low pressure gas pipes; the water module is connected to the outdoor unit through gas-side branches and liquid-side branches.

[0007] In one or more embodiments of this application, the air conditioning system further includes: a gas pipe regulating valve and a high-low pressure gas pipe regulating valve; wherein, the gas pipe regulating valve is disposed on the gas pipe; the high-low pressure gas pipe regulating valve is disposed on the high-low pressure gas pipe; the processing device is configured to, under the condition that only the water module is operating for heating and the compressor discharge pressure deviates from the preset discharge pressure range, adjust the opening of the gas pipe regulating valve and the high-low pressure gas pipe regulating valve from a preset opening degree until the compressor discharge pressure no longer deviates from the preset discharge pressure range.

[0008] In one or more embodiments of this application, the processing device is configured to, under the conditions that only the water module is operating for heating, the only water module is operating for heating for more than a first set time, and the compressor discharge pressure is higher than the upper limit threshold of the preset discharge pressure range, increase the opening of the gas pipe regulating valve and the high and low pressure gas pipe regulating valve from a preset opening until the compressor discharge pressure decreases to below the upper limit threshold of the preset discharge pressure range.

[0009] In one or more embodiments of this application, the processing device is configured to, after the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range, invoke a preset intervention target subcooling degree and obtain the real-time subcooling degree of the air-cooled module heat exchanger; and, when the real-time subcooling degree deviates from the intervention target subcooling degree, adjust the opening of the air-cooled module electronic expansion valve so that the real-time subcooling degree transitions to the intervention target subcooling degree.

[0010] In one or more embodiments of this application, the processing device is configured to, after the compressor discharge pressure drops below the upper limit threshold of a preset discharge pressure range, invoke a preset intervention target subcooling and obtain the real-time subcooling of the air-cooled module heat exchanger; and, when the real-time subcooling is higher than the intervention target subcooling, increase the opening of the air-cooled module electronic expansion valve so that the real-time subcooling transitions to the intervention target subcooling; or, when the real-time subcooling is lower than the intervention target subcooling, decrease the opening of the air-cooled module electronic expansion valve so that the real-time subcooling transitions to the intervention target subcooling.

[0011] In one or more embodiments of this application, the processing device is configured to, after the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range, keep the opening of the adjusted gas pipe regulating valve and the high and low pressure gas pipe regulating valve unchanged; under the conditions that only the water module is in heating operation, the only water module is in heating operation for more than a second set time, and the compressor discharge pressure deviates from the preset discharge pressure range again, adjust the opening of the self-adjusted gas pipe regulating valve and the high and low pressure gas pipe regulating valve again until the compressor discharge pressure no longer deviates from the preset discharge pressure range.

[0012] In one or more embodiments of this application, the air conditioning system includes an outdoor unit, an air-cooled module, and a water module; wherein, the outdoor unit includes a compressor, the air-cooled module is provided with an air-cooled module heat exchanger, the air-cooled module heat exchanger is correspondingly provided with an air-cooled module electronic expansion valve, and the outdoor unit and the air-cooled module are connected by a gas pipe and a liquid pipe; the water module is connected to the outdoor unit through a gas-side branch and a liquid-side branch.

[0013] In one or more embodiments of this application, the air conditioning system further includes a gas pipe regulating valve disposed on a gas pipe; and a processing device configured to adjust the opening of the gas pipe regulating valve from a preset opening degree until the compressor discharge pressure no longer deviates from the preset discharge pressure range, provided that only the water module is operating for heating and the compressor discharge pressure deviates from a preset discharge pressure range.

[0014] In one or more embodiments of this application, the processing device is configured to, under the conditions that only the water module is operating for heating, the only water module is operating for heating for more than a first set time, and the compressor discharge pressure is higher than the upper limit threshold of a preset discharge pressure range, increase the opening of the gas pipe regulating valve by self-opening until the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range.

[0015] In one or more embodiments of this application, the processing device is configured to, after the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range, invoke a preset intervention target subcooling degree and obtain the real-time subcooling degree of the air-cooled module heat exchanger; and, when the real-time subcooling degree deviates from the intervention target subcooling degree, adjust the opening of the air-cooled module electronic expansion valve so that the real-time subcooling degree transitions to the intervention target subcooling degree.

[0016] In one or more embodiments of this application, the processing device is configured to, after the compressor discharge pressure drops below the upper limit threshold of a preset discharge pressure range, invoke a preset intervention target subcooling and obtain the real-time subcooling of the air-cooled module heat exchanger; and, when the real-time subcooling is higher than the intervention target subcooling, increase the opening of the air-cooled module electronic expansion valve so that the real-time subcooling transitions to the intervention target subcooling; or, when the real-time subcooling is lower than the intervention target subcooling, decrease the opening of the air-cooled module electronic expansion valve so that the real-time subcooling transitions to the intervention target subcooling.

[0017] In one or more embodiments of this application, the processing device is configured to maintain the opening of the adjusted gas pipe regulating valve unchanged after the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range; and under the conditions that only the water module is operating for heating, the only water module is operating for heating for more than a second set time, and the compressor discharge pressure deviates from the preset discharge pressure range again, the opening of the self-adjusted gas pipe regulating valve and the high and low pressure gas pipe regulating valve is readjusted again until the compressor discharge pressure no longer deviates from the preset discharge pressure range.

[0018] This application automatically adjusts the opening of the gas pipe regulating valve and the high and low pressure gas pipe regulating valve to keep the compressor discharge pressure within the preset discharge pressure range, avoiding excessive or insufficient refrigerant entering the water module, improving the cooling or heating efficiency of the air conditioning system, and keeping the temperature of the water module within a suitable range, thereby improving user comfort and satisfaction.

[0019] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an air conditioning system provided in one or more embodiments of this application;

[0022] Figure 2 This is a schematic diagram of the structure of an air conditioning system provided in one or more embodiments of this application;

[0023] Figure 3 This is a schematic diagram of the structure of an air conditioning system provided in one or more embodiments of this application;

[0024] Figure 4 This is a schematic diagram of the structure of an air conditioning system provided in one or more embodiments of this application;

[0025] Figure 5 This is a schematic diagram of the structure of an air conditioning system provided in one or more embodiments of this application;

[0026] Figure 6 This is a schematic diagram of the structure of an air conditioning system provided in one or more embodiments of this application;

[0027] Figure 7 This is a schematic diagram of the structure of an air conditioning system provided in one or more embodiments of this application;

[0028] Figure 8 This is a schematic diagram of the structure of an air conditioning system provided in one or more embodiments of this application;

[0029] Figure 9 This is a schematic diagram of the structure of the processing device in an air conditioning system provided by one or more embodiments of this application;

[0030] Figure 10 This is a flowchart of an air conditioning system provided in one or more embodiments of this application;

[0031] Figure 11 This is a flowchart of an air conditioning system provided in one or more embodiments of this application;

[0032] Figure 12 This is a flowchart of an air conditioning system provided in one or more embodiments of this application;

[0033] Figure 13 This is a flowchart of an air conditioning system provided in one or more embodiments of this application;

[0034] In the diagram: 1. Air conditioning system; 10. Outdoor unit; 101. Compressor; 102. Outdoor heat exchanger; 103. Gas-liquid separator; 104. First switching valve; 105. Second switching valve; 106. Outdoor fan; 107. Outdoor electronic expansion valve; 108. High and low pressure gas pipe regulating valve; 109. Gas pipe regulating valve; 110. Gas pipe solenoid valve; 111. Gas pipe capillary tube; 112. High and low pressure gas pipe solenoid valve; 113. High and low pressure gas pipe capillary tube; 20. Air-cooled module; 201. Air-cooled module heat exchanger; 201-1. Air-cooled module heat exchanger; 201-2. Air-cooled module heat exchanger; 202. Indoor fan; 203. Air-cooled module electronic expansion valve; 2 03-1, Air-cooled module electronic expansion valve; 203-2, Air-cooled module electronic expansion valve; 30, Water module; 301, Water module heat exchanger; 302, Water module electronic expansion valve; 40, Liquid pipe; 41, Liquid pipe shut-off valve; 50, High and low pressure gas pipes; 51, High and low pressure gas pipe shut-off valve; 60, Gas pipe; 61, Gas pipe shut-off valve; 70, Gas-side branch; 80, Liquid-side branch; 90, Processing device; 901, Processor; 902, Non-volatile memory; 903, Volatile memory; 904, Display device; 905, Operating device; 906, Communication interface; 907, Drive device; 908, Bus; 909, Storage medium; 910, Storage medium. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and letters may be repeated in different examples; this repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and the use of other materials.

[0041] Hereinafter, one or more embodiments of this application will be described in detail with reference to the accompanying drawings.

[0042] Figure 1 This diagram illustrates the structure of an air conditioning system provided by one or more specific embodiments of the present invention.

[0043] The air conditioning system 1 provided by one or more embodiments of this application is a three-pipe air conditioning system. "Three-pipe" is a configuration method of variable frequency multi-split air conditioning system, in which multiple air-cooled modules 20 can be independently controlled and serve different rooms or areas. The main feature of "three-pipe" is that it uses three pipes to connect the air-cooled modules 20 and the outdoor unit 10. The three pipes include a gas pipe 60, a liquid pipe 40, and high and low pressure gas pipes 50, respectively. Among them, the gas pipe 60 is used to transport gaseous refrigerant, the liquid pipe 40 is used to transport liquid refrigerant, and the high and low pressure gas pipes 50 depend on the working mode and working conditions of the air conditioning system, and can transport both high-pressure gaseous refrigerant and low-pressure gaseous refrigerant.

[0044] The three-pipe air conditioning system can more flexibly adjust the cooling or heating needs of each air-cooled module 20. Through the independent control of the three pipes, the air conditioning system can more effectively recover energy and optimize operation, thereby improving energy efficiency and energy saving performance.

[0045] Three-pipe air conditioning systems are commonly used in large buildings such as office buildings, hotels, and hospitals. They can meet complex and diverse air conditioning needs and are suitable for large building environments that require independent control of multiple spaces.

[0046] In one or more embodiments of the present invention, an air conditioning system integrates a refrigeration cycle. The refrigeration cycle uses a compressor 101, a condenser, a throttling device, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

[0047] From a principle perspective, low-temperature, low-pressure refrigerant enters compressor 101, where it is compressed into a high-temperature, high-pressure refrigerant gas, which is then discharged. The discharged refrigerant gas flows into the condenser, where the compressed refrigerant is condensed into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0048] The throttling device expands the high-temperature, high-pressure liquid refrigerant that condenses in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the throttling device and returns the low-temperature, low-pressure refrigerant to the compressor 101. The evaporator achieves a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioning system regulates the temperature of the indoor space.

[0049] In one or more embodiments of this application, the air conditioning system includes an outdoor unit 10 and an air-cooled module 20 connected to each other.

[0050] In one or more embodiments of this application, the air conditioning system includes an outdoor unit 10 and two air-cooled modules 20 connected to each other. Figure 1As shown in the figure. However, in this application, there is no particular limitation on the number of air-cooled modules 20. More air-cooled modules 20 can be arranged in an air conditioning system in the same manner as the air-cooled modules 20 shown in the figure.

[0051] The outdoor unit 10 and the air-cooled module 20 are connected by a liquid pipe 40, a gas pipe 60, and high and low pressure gas pipes 50. The liquid pipe 40, gas pipe 60, and high and low pressure gas pipes 50 are used to supply refrigerant flow, so that the refrigerant can form a refrigerant loop and circulate in it.

[0052] In one or more embodiments of this application, a liquid pipe shut-off valve 41 is provided on the liquid pipe 40.

[0053] In one or more embodiments of this application, an airway shut-off valve 61 is provided on the airway 60.

[0054] In one or more embodiments of this application, a high-low pressure gas pipe shut-off valve 51 is provided on the high-low pressure gas pipe 50.

[0055] The basic structure and function of the outdoor unit 10 are described below. When using the same system architecture, the number of outdoor units 10 in the air conditioning system can be expanded to multiple, and several outdoor units 10 can operate in a group.

[0056] In one or more embodiments of this application, the outdoor unit 10 is part of the refrigeration cycle that includes a compressor 101 and an outdoor heat exchanger 102. The outdoor unit 10 can perform heating or cooling operation on the outdoor side to provide energy to the air-cooled module 20 to raise or lower the indoor temperature.

[0057] A throttling device may be provided in the outdoor unit 10 or the air-cooled module 20. In one or more embodiments of this application, the outdoor heat exchanger 102 is matched with an outdoor electronic expansion valve 107.

[0058] In one or more embodiments of this application, a gas-liquid separator 103 is also provided in the outdoor unit 10. The gas-liquid separator 103 separates the gas and liquid based on the density difference. When a refrigerant containing a mixture of gas and liquid enters the gas-liquid separator 103, the denser liquid refrigerant sinks due to gravity, while the less dense gaseous refrigerant rises. In this way, the gas-liquid separator 103 can effectively separate the liquid and gaseous refrigerants. The gas-liquid separator 103 is located on the suction side of the compressor 101, and can also store excess refrigerant.

[0059] In one or more embodiments of this application, the outdoor unit 10 is further provided with a first switching valve 104 and a second switching valve 105.

[0060] In one or more embodiments of this application, the first switching valve 104 and the second switching valve 105 are both four-way valves.

[0061] In one or more embodiments of this application, an outdoor fan 106 is further provided in the outdoor unit 10. The rotation speed of the outdoor fan 106 can be controlled to change the airflow that exchanges heat with the outdoor heat exchanger 102 by adjusting the rotation speed. The outdoor fan 106 can be an axial flow fan, a cross flow fan, or other optional fan types. The outdoor fan 106 is located near the outdoor heat exchanger 102.

[0062] The outdoor unit 10 is equipped with an outdoor control circuit. This circuit is typically housed in a well-sealed electrical box. The outdoor control circuit includes components such as a processor, storage unit, input / output interfaces, and communication interfaces. The processor can be a dedicated processor, a central processing unit (CPU), etc. The processor can access the storage unit to execute instructions or application programs stored therein to perform related functions. The storage unit may include volatile memory and / or non-volatile memory. The input / output interfaces can communicate with various sensors installed in the outdoor unit 10 to receive their detection values, including a compressor discharge pressure sensor. The input / output interfaces can also communicate with devices such as the frequency converter driving the compressor 101, the outdoor fan 106, the first switching valve 104, the second switching valve 105, and the outdoor electronic expansion valve 107 to output control commands generated by the processor. The communication interface can support different wireless communication protocols, such as Wi-Fi, Bluetooth, near field communication, NB-IoT, etc., to communicate and connect with other electronic devices, including but not limited to cloud servers, computers, programmable logic controllers, smartphones, tablets, PDAs, smart control fixtures, wearable devices, and vehicle-mounted devices, etc.

[0063] The structure and function of the air-cooled module 20 are described below, using one of the air-cooled modules 20 as an example. The following description also applies to other air-cooled modules 20.

[0064] The air-cooled module 20 utilizes the energy generated by the outdoor unit 10 to either increase or decrease the indoor temperature to perform cooling or heating operations. More specifically, the air-cooled module 20 refers to a terminal device that uses a fan to draw in indoor air and exchange heat with the air-cooled module heat exchanger. The processed air is then blown into the room to achieve cooling, dehumidification, and other purposes.

[0065] In one or more embodiments of this application, the air-cooled module 20 includes a connected air-cooled module heat exchanger (as shown in Figures 201-1 and 201-2) and an air-cooled module electronic expansion valve (as shown in Figures 203-1 and 203-2). When the air-cooled module heat exchanger is used as a condenser, the air-cooled module 20 is used as a heater in heating mode; when the air-cooled module heat exchanger is used as an evaporator, the air-cooled module 20 is used as a cooler in cooling mode.

[0066] The air-cooled module heat exchanger is equipped with a corresponding air-cooled module electronic expansion valve. The air-cooled module electronic expansion valve is configured to reduce the pressure of the refrigerant and cause it to expand.

[0067] In one or more embodiments of this application, the air-cooled module 20 is further provided with an indoor fan 202. The indoor fan 202 may be an axial flow fan, a cross flow fan, or other types of fan. The indoor fan 202 may be installed close to the heat exchanger of the air-cooled module.

[0068] In one or more embodiments of this application, the air conditioning system further includes a water module 30. The water module 30 can exchange heat between the high-temperature, high-pressure refrigerant discharged from the compressor 101 and water, thereby transferring the heat energy of the refrigerant to the water, and using the heated water for applications such as underfloor heating, central heating, or hot water supply.

[0069] In cold climates, especially during heating seasons, the outside air temperature is low, resulting in relatively low heating efficiency using the traditional air-cooled module 20, which may even fail to meet heating demands. In contrast, using the water module 30 for heating can more effectively utilize the heat energy of the high-temperature, high-pressure refrigerant discharged from the compressor 101, thereby achieving the purpose of low-temperature heating.

[0070] The water module 30 includes a water module heat exchanger 301 and a water module electronic expansion valve 302. The water module heat exchanger 301 is used to exchange heat between the high-temperature, high-pressure refrigerant discharged from the compressor 101 and water, while the water module electronic expansion valve 302 is used to control the refrigerant flow rate and precisely regulate the refrigerant temperature. The water module 30 is connected to the outdoor unit 10 through a gas-side branch 70 and a liquid-side branch 80.

[0071] The following combination Figure 2 This section introduces the refrigerant circuit of an air conditioning system in cooling mode.

[0072] like Figure 2As shown, during refrigeration operation, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 101 passes through the first switching valve 104, where it condenses into a high-temperature, high-pressure liquid refrigerant in the outdoor heat exchanger 102. The high-temperature, high-pressure liquid refrigerant flows out from the outdoor electronic expansion valve 107, passes through the liquid pipe shut-off valve 41 and liquid pipe 40 (both in the open position), and enters the air-cooled module 20. After entering the air-cooled module 20, it flows through the air-cooled module electronic expansion valves (203-1 and 203-2). During this process, the high-temperature, high-pressure liquid refrigerant is throttled by the outdoor electronic expansion valve 107 and the air-cooled module electronic expansion valves (203-1 and 203-2) into a low-temperature, low-pressure two-phase refrigerant (liquid and gas phases). The low-temperature, low-pressure two-phase refrigerant evaporates into a low-temperature, low-pressure gaseous refrigerant in the air-cooled module heat exchangers (201-1 and 201-2).

[0073] Low-temperature, low-pressure gaseous refrigerant flows out from the air-cooled module heat exchanger 201-1. The gaseous refrigerant flowing from the air-cooled module heat exchanger 201-1 returns to the outdoor unit 10 side through the open gas pipe shut-off valve 61 and gas pipe 60, and then flows into the gas-liquid separator 103 after passing through the first switching valve 104. Similarly, the gaseous refrigerant flowing from the air-cooled module heat exchanger 201-2 returns to the outdoor unit 10 side through the open high and low pressure gas pipe shut-off valve 51 and high and low pressure gas pipe 50, and then flows into the gas-liquid separator 103 after passing through the second switching valve 105. The low-temperature, low-pressure gaseous refrigerant flowing out of the gas-liquid separator 103 further returns to the suction port of the compressor 101, thus completing the refrigeration cycle.

[0074] During the refrigeration cycle, the throttling device of water module 30 is in the closed state to prevent the water module 30 from malfunctioning due to excessively low temperature.

[0075] like Figure 3As shown, in one or more embodiments of this application, during heating operation, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 101 is divided into two paths. One path passes through the first switching valve 104, the gas pipe shut-off valve 61 (in the open state), and the gas pipe 60, entering the air-cooled module heat exchanger 201-1. The other path passes through the second switching valve 105 and is further divided into two paths. One path passes through the high- and low-pressure gas pipe shut-off valve 51 (in the open state) and the high- and low-pressure gas pipe 50, entering the air-cooled module heat exchanger 201-2. The other path flows to the water module heat exchanger 301. The high-temperature, high-pressure gaseous refrigerant condenses into a high-temperature, high-pressure liquid refrigerant in the air-cooled module heat exchanger 201-1, the air-cooled module heat exchanger 201-2, and the water module heat exchanger 301. High-temperature, high-pressure liquid refrigerant passes through the air-cooled module electronic expansion valves 203-1 and 203-2, then returns to the outdoor unit 10 via the open liquid pipe shut-off valve 41 and liquid pipe 40. It then merges with the refrigerant passing through the throttling element of the water module 30 and flows to the outdoor electronic expansion valve 107. After passing through the outdoor electronic expansion valve 107, it becomes a low-temperature, low-pressure refrigerant. This low-temperature, low-pressure refrigerant flows to the outdoor heat exchanger 102, where it evaporates into a low-temperature, low-pressure gaseous refrigerant. The low-temperature, low-pressure gaseous refrigerant passes through the first switching valve 104 and flows into the gas-liquid separator 103. The low-temperature, low-pressure gaseous refrigerant flowing out of the gas-liquid separator 103 flows into the suction port of the compressor 101, thus completing the heating cycle.

[0076] In such Figure 3 During the heating operation shown, the indoor unit and the water module 30 simultaneously turn on the heating mode. The opening degree of the air-cooled module electronic expansion valve 203-1, the air-cooled module electronic expansion valve 203-2 and the water module electronic expansion valve 302 is adjustable, so that the air-cooled module 20 and the water module 30 can have good heating effect at the same time.

[0077] like Figure 4 As shown, in one or more embodiments of this application, during heating operation, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 101 flows to the water module heat exchanger 301 after passing through the second switching valve 105. The high-temperature, high-pressure gaseous refrigerant condenses into a high-temperature, high-pressure liquid refrigerant in the water module heat exchanger 301. The high-temperature, high-pressure liquid refrigerant then flows to the outdoor electronic expansion valve 107 after passing through the water module electronic expansion valve 302, becoming a low-temperature, low-pressure refrigerant. This low-temperature, low-pressure refrigerant flows to the outdoor heat exchanger 102, where it evaporates into a low-temperature, low-pressure gaseous refrigerant. The low-temperature, low-pressure gaseous refrigerant then flows through the first switching valve 104 into the gas-liquid separator 103. The low-temperature, low-pressure gaseous refrigerant flowing out of the gas-liquid separator 103 flows into the compressor 101 suction port, thus completing the heating cycle of the water module 30.

[0078] In such Figure 4During the heating operation shown, the water module 30 independently activates the heating mode.

[0079] The refrigerant charge of the air conditioning system is calculated based on the cooling capacity of the system and the performance data of the selected refrigerant, while also considering a certain margin to ensure the normal operation of the air conditioning system under extreme working conditions. When the water module 30 is independently in heating mode, the air-cooled module 20 may have a large amount of refrigerant allocated to it, resulting in insufficient heating capacity of the water module 30 and failure to reach the ideal set temperature within the expected time. However, directly preventing the refrigerant from being allocated to the air-cooled module 20 will lead to an excessive amount of refrigerant circulating, which will cause the overall pressure of the air conditioning system to be too high. When the overall pressure of the air conditioning system is too high, the compressor 101 will automatically reduce its operating frequency, which will also lead to a decrease in heat output and cause fluctuations in indoor temperature.

[0080] To solve this problem, in one or more embodiments of this application, the air conditioning system is further provided with a gas pipe regulating valve 109 and a high and low pressure gas pipe regulating valve 108; wherein, the gas pipe regulating valve 109 is provided on the gas pipe 60, and the high and low pressure gas pipe regulating valve 108 is provided on the high and low pressure gas pipe 50.

[0081] In one or more embodiments of this application, the tracheal regulating valve 109 is located between the tracheal shut-off valve 61 and the first switching valve 104.

[0082] In one or more embodiments of this application, the high-low pressure air pipe regulating valve 108 is located between the high-low pressure air pipe shut-off valve 51 and the second switching valve 105, and the inlet of the air-side branch 70 of the water module 30 is located between the high-low pressure air pipe regulating valve 108 and the second switching valve 105.

[0083] In one or more embodiments of this application, the tracheal regulating valve 109 is an electronic expansion valve.

[0084] In one or more embodiments of this application, the tracheal regulating valve 109 is a pneumatic ball valve.

[0085] In one or more embodiments of this application, such as Figure 7 As shown, the tracheal regulating valve 109 is a tracheal solenoid valve 110, which is connected in series with the tracheal capillary tube 111.

[0086] In one or more embodiments of this application, the high and low pressure air pipe regulating valve 108 is an electronic expansion valve.

[0087] In one or more embodiments of this application, the high and low pressure air pipe regulating valve 108 is a pneumatic ball valve.

[0088] In one or more embodiments of this application, such as Figure 7As shown, the high and low pressure air pipe regulating valve 108 is a high and low pressure air pipe solenoid valve 110, which is connected in series with the high and low pressure air pipe capillary tube 113.

[0089] like Figure 5 As shown, in one or more embodiments of this application, the air conditioning system is further provided with a processing device 90.

[0090] Figure 6 This is a schematic block diagram of the hardware structure of the processing device 90. The processing device 90 includes components such as a processor 901, volatile memory 902, non-volatile memory 903, a display device 904, an operating device 905, a communication interface 906, and a drive device 907, which are interconnected via a bus 908. The processor can be a dedicated processor, a central processing unit, etc. The processor can access the storage unit to execute instructions or application programs stored in the storage unit to achieve related functions. The display device is used to display various information. The operating device is used to receive various operations. The drive device is a hardware terminal that interacts with the storage medium. In one or more embodiments of this application, the storage medium includes media such as CD-ROMs, floppy disks, and optical-magnetic-optical disks that record information in optical, electrical, or magnetic ways. Figure 6 As shown in Figure 909. The storage medium can also be a semiconductor memory that records information in a point-and-click manner, such as ROM or flash memory, as shown in Figure 610.

[0091] The processing device 90 can be the outdoor control circuit in the outdoor unit 10 of the air conditioning system, or the indoor controller in the indoor unit, such as an on-board system based on an MCU.

[0092] The processing device 90 is configured to adjust the opening of the gas pipe regulating valve 109 and the high and low pressure gas pipe regulating valve 108 from a preset opening degree when only the water module 30 is operating for heating and the compressor 101 discharge pressure deviates from the preset discharge pressure range, until the compressor discharge pressure no longer deviates from the preset discharge pressure range.

[0093] For example, such as Figure 10 As shown, the processing device 90 is configured to perform the multiple steps shown in the figure:

[0094] The processing unit 90 determines whether only the water module is operating for heating; if not, the original control logic remains unchanged. If only the water module is operating for heating, it further determines whether the compressor discharge pressure deviates from the preset discharge pressure range. If the compressor discharge pressure deviates from the preset discharge pressure range, it adjusts the opening of the gas pipe regulating valve and the high and low pressure gas pipe regulating valve from the preset opening degree until the compressor discharge pressure no longer deviates from the preset discharge pressure range.

[0095] In one or more embodiments of this application, the preset opening degree may be the minimum opening degree.

[0096] In one or more embodiments of this application, the preset opening degree may be a safe opening degree calculated under experimental conditions.

[0097] This application automatically adjusts the opening of the gas pipe regulating valve and the high and low pressure gas pipe regulating valve to keep the compressor discharge pressure within the preset discharge pressure range, avoiding excessive or insufficient refrigerant entering the water module, improving the cooling or heating efficiency of the air conditioning system, and keeping the temperature of the water module within a suitable range, thereby improving user comfort and satisfaction.

[0098] In one or more embodiments of this application, the processing device 90 is configured to, under the conditions that only the water module is operating for heating, the only water module is operating for heating for more than a first set time, and the compressor discharge pressure is higher than the upper limit threshold of the preset discharge pressure range, increase the opening of the gas pipe regulating valve and the high and low pressure gas pipe regulating valve from a preset opening until the compressor discharge pressure decreases to below the upper limit threshold of the preset discharge pressure range.

[0099] In one or more embodiments of this application, the processing device 90 is configured to control the compressor to operate at a reduced frequency when the compressor discharge pressure exceeds a safe pressure threshold.

[0100] In one or more embodiments of this application, the upper limit threshold of the preset exhaust pressure range is lower than the safe pressure threshold.

[0101] For example, such as Figure 11 As shown, the processing device 90 is configured to perform the multiple steps shown in the figure:

[0102] The processing unit 90 determines whether only the water module is operating for heating. If not, the original control logic remains unchanged. If only the water module is operating for heating, it further determines whether the duration of this operation exceeds a first preset duration. This determination is made because refrigerant pressure fluctuates when the air conditioning system is first started or when the load changes, potentially leading to uncontrolled operation. Therefore, after determining that the duration of water module operation exceeds the first preset duration, it further determines whether the compressor discharge pressure is higher than the upper limit of a preset discharge pressure range. If the compressor discharge pressure is higher than the upper limit, the opening of the gas pipe regulating valve and the high / low pressure gas pipe regulating valve is increased from a preset opening degree. The preset opening degree can be the minimum opening degree; for example, the opening of the gas pipe regulating valve and the high / low pressure gas pipe regulating valve is gradually increased from the minimum opening degree (close to 0) until the compressor discharge pressure drops below the upper limit of the preset discharge pressure range.

[0103] Through such Figure 11 The steps shown can effectively prevent the air conditioning system from operating at excessively high pressure when only the water module is in heating mode, which would cause the compressor to reduce its operating frequency.

[0104] After allowing some refrigerant to enter the air-cooled module heat exchanger, it is also necessary to prevent excessive refrigerant from entering the air-cooled module heat exchanger to avoid insufficient refrigerant in the water module heat exchanger. To solve this problem, the processing device 90 is configured to call a preset intervention target subcooling degree after the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range, and obtain the real-time subcooling degree of the air-cooled module heat exchanger. Figure 12 As shown, the processing device 90 is further configured to adjust the opening of the electronic expansion valve of the air-cooled module when the real-time subcooling deviates from the intervention target subcooling, so that the real-time subcooling transitions to the intervention target subcooling.

[0105] In one or more embodiments of this application, the real-time subcooling is the difference between the liquid pipe temperature sensor located on the liquid pipe side of the air-cooled module heat exchanger and the saturation temperature corresponding to the compressor discharge pressure.

[0106] In one or more embodiments of this application, the target subcooling can be initially set according to a reference design manual or industry standard; then, the impact of the target subcooling on performance is tested when only the water module is operating, and adjustments are made as necessary. Further observation of real-time subcooling changes under different operating conditions is conducted to evaluate the applicability of the target subcooling. Subsequently, the performance and operating data of the air-cooled module heat exchanger are periodically checked, and the need for adjustment of the target subcooling is analyzed based on the check results.

[0107] In one or more embodiments of this application, the target subcooling can be predicted using a predictive model based on load changes of the water-cooled module, compressor operating status, and the adjustability of the air conditioning system.

[0108] For example, under experimental conditions, key features such as the set temperature of the water-cooled module, the inlet temperature of the water-cooled module heat exchanger, the outlet temperature of the water-cooled module heat exchanger, the compressor operating frequency, the compressor discharge pressure, the opening of the gas pipe regulating valve, the opening of the high and low pressure gas pipe regulating valves, and the corresponding intervention target subcooling (e.g., manually obtained through the methods provided in the above embodiments) can be collected and preprocessed. The collected data is divided into a training set and a test set. Linear regression, support vector regression, ensemble learning, and other models are selected for modeling. The selected model is trained using the training set to optimize the model parameters to maximize prediction accuracy. The performance of the trained model is evaluated using the test set. After training and validation, the set temperature of the water-cooled module is used as input to predict the optimal intervention target subcooling in real time. This ensures that once the opening of the gas pipe regulating valve and the high and low pressure gas pipe regulating valve are determined, the opening of the electronic expansion valve of the air-cooled module can remain optimal, maintaining a reasonable overall refrigerant distribution in the system when only the water-cooled module is operating for heating, thereby improving the performance and energy efficiency of the air conditioning system.

[0109] More specifically, the processing device 90 is configured to, after the compressor discharge pressure drops below the upper limit threshold of a preset discharge pressure range, invoke a preset intervention target subcooling and obtain the real-time subcooling of the air-cooled module heat exchanger. When the real-time subcooling is higher than the intervention target subcooling, the opening of the air-cooled module's electronic expansion valve is increased, causing the real-time subcooling to transition to the intervention target subcooling. When the real-time subcooling is lower than the intervention target subcooling, the opening of the air-cooled module's electronic expansion valve is decreased, causing the real-time subcooling to transition to the intervention target subcooling.

[0110] Central air conditioning is a complex, multivariable system. Even with the calculated intervention target subcooling level generated through predictive models, it is impossible to guarantee that fluctuations will not occur during long-term operation, especially when used as underfloor heating, where a relatively long operating period is required. To address this issue, in one or more embodiments of this application, the processing device 90 is configured to maintain the opening of the adjusted gas pipe regulating valve and the high- and low-pressure gas pipe regulating valve unchanged after the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range. Under the condition that only the water module is operating for heating, and this operation is maintained for more than a second set time, and the compressor discharge pressure deviates from the preset discharge pressure range again, the opening of the self-adjusted gas pipe regulating valve and the high- and low-pressure gas pipe regulating valve is readjusted again until the compressor discharge pressure no longer deviates from the preset discharge pressure range.

[0111] like Figure 13As shown, the processing device 90 is configured to maintain the opening of the adjusted gas pipe regulating valve and the high-low pressure gas pipe regulating valve unchanged after the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range. Under the conditions that only the water module is in heating operation, the water module is kept in heating operation for more than a second set time, and the compressor discharge pressure is below the lower limit threshold of the preset discharge pressure range, the opening of the self-adjusted gas pipe regulating valve and the high-low pressure gas pipe regulating valve is adjusted again. For example, the opening of the self-adjusted gas pipe regulating valve and the high-low pressure gas pipe regulating valve is reduced until the compressor discharge pressure is no longer below the lower limit threshold of the preset discharge pressure range, that is, no longer deviating from the preset discharge pressure range.

[0112] Figure 8 and Figure 9 This diagram illustrates the structure of an air conditioning system provided by one or more specific embodiments of the present invention.

[0113] One or more embodiments of this application provide an air conditioning system that is a two-pipe air conditioning system.

[0114] The two-pipe air conditioning system includes an outdoor unit 10, an air-cooled module 20, and a water module 30. The outdoor unit 10 is equipped with a compressor 101, and the air-cooled module 20 is equipped with an air-cooled module heat exchanger 201, which is correspondingly equipped with an air-cooled module electronic expansion valve 203. The outdoor unit 10 and the air-cooled module 20 are connected via a gas pipe 60 and a liquid pipe 40. The water module 30 is connected to the outdoor unit 10 via a gas-side branch line 70 and a liquid-side branch line 80.

[0115] In one or more embodiments of this application, the two-pipe air conditioning system further includes a gas pipe regulating valve 109. The gas pipe regulating valve 109 is disposed on the gas pipe 60.

[0116] In one or more embodiments of this application, the two-pipe air conditioning system further includes a processing device 90. The processing device 90 is configured to adjust the opening of the gas pipe regulating valve from a preset opening degree until the compressor discharge pressure no longer deviates from the preset discharge pressure range, provided that only the water module 30 is operating in heating mode and the compressor discharge pressure deviates from a preset discharge pressure range.

[0117] In one or more embodiments of this application, the processing device 90 in the two-pipe air conditioning system is further configured to, under the conditions that only the water module 30 is operating in heating mode, the only water module 30 is operating in heating mode for more than a first set time, and the compressor discharge pressure is higher than the upper limit threshold of the preset discharge pressure range, increase the opening of the gas pipe regulating valve by self-opening until the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range.

[0118] In one or more embodiments of this application, the processing device 90 in the two-pipe air conditioning system is further configured to, after the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range, invoke a preset intervention target subcooling degree and obtain the real-time subcooling degree of the air-cooled module heat exchanger 201; and, when the real-time subcooling degree deviates from the intervention target subcooling degree, adjust the opening of the air-cooled module electronic expansion valve 203 so that the real-time subcooling degree transitions to the intervention target subcooling degree.

[0119] In one or more embodiments of this application, the processing device 90 in the two-pipe air conditioning system is further configured to, after the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range, invoke a preset intervention target subcooling degree and obtain the real-time subcooling degree of the air-cooled module heat exchanger 201; and, when the real-time subcooling degree is higher than the intervention target subcooling degree, increase the opening of the air-cooled module electronic expansion valve 203 so that the real-time subcooling degree transitions to the intervention target subcooling degree; or, when the real-time subcooling degree is lower than the intervention target subcooling degree, decrease the opening of the air-cooled module electronic expansion valve 203 so that the real-time subcooling degree transitions to the intervention target subcooling degree.

[0120] In one or more embodiments of this application, the processing device 90 in the two-pipe air conditioning system is further configured to maintain the opening of the adjusted gas pipe regulating valve unchanged after the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range; and under the conditions that only the water module 30 is operating for heating, the water module 30 is operating for heating for more than a second set time, and the compressor discharge pressure deviates from the preset discharge pressure range again, the opening of the self-adjusted gas pipe regulating valve and the high and low pressure gas pipe 50 regulating valve is readjusted again until the compressor discharge pressure no longer deviates from the preset discharge pressure range.

[0121] In one or more embodiments of this application, the gas pipe regulating valve in the two-pipe air conditioning system is an electronic expansion valve, which is located between the gas pipe shut-off valve and the switching valve.

[0122] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0123] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. Air conditioning system, including: Outdoor unit, which includes a compressor; The air-cooled module is equipped with an air-cooled module heat exchanger, and the air-cooled module heat exchanger is equipped with an air-cooled module electronic expansion valve. The outdoor unit and the air-cooled module are connected by gas pipes, liquid pipes and high and low pressure gas pipes. and The water module is connected to the outdoor unit via a gas-side branch and a liquid-side branch; Its characteristic is that it further includes: A tracheal regulating valve is provided on the tracheal tube; High and low pressure gas pipe regulating valve, wherein the high and low pressure gas pipe regulating valve is disposed on the high and low pressure gas pipe; and The processing device is configured to adjust the opening of the gas pipe regulating valve and the high and low pressure gas pipe regulating valve from a preset opening degree, under the condition that only the water module is operating for heating and the compressor discharge pressure deviates from the preset discharge pressure range, until the compressor discharge pressure no longer deviates from the preset discharge pressure range.

2. The air conditioning system according to claim 1, characterized in that, The processing device is configured to, under the conditions that only the water module is operating for heating, maintain only the water module operating for heating for more than a first set time, and the compressor discharge pressure is higher than the upper limit threshold of the preset discharge pressure range, increase the opening of the gas pipe regulating valve and the high and low pressure gas pipe regulating valve from the preset opening until the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range.

3. The air conditioning system according to claim 2, characterized in that, The processing device is configured to, after the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range, invoke a preset intervention target subcooling degree and obtain the real-time subcooling degree of the air-cooled module heat exchanger; and, when the real-time subcooling degree deviates from the intervention target subcooling degree, adjust the opening of the air-cooled module electronic expansion valve so that the real-time subcooling degree transitions to the intervention target subcooling degree.

4. The air conditioning system according to claim 3, characterized in that, The processing device is configured to, after the compressor discharge pressure drops below the upper limit threshold of a preset discharge pressure range, invoke a preset intervention target subcooling degree and obtain the real-time subcooling degree of the air-cooled module heat exchanger; and, when the real-time subcooling degree is higher than the intervention target subcooling degree, increase the opening of the electronic expansion valve of the air-cooled module so that the real-time subcooling degree transitions to the intervention target subcooling degree; or, when the real-time subcooling degree is lower than the intervention target subcooling degree, decrease the opening of the electronic expansion valve of the air-cooled module so that the real-time subcooling degree transitions to the intervention target subcooling degree.

5. The air conditioning system according to claim 3 or 4, characterized in that, The processing device is configured to maintain the opening of the adjusted gas pipe regulating valve and the high and low pressure gas pipe regulating valve unchanged after the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range; under the conditions that only the water module is operating for heating, the operation of only the water module for heating is maintained for more than a second set time, and the compressor discharge pressure deviates from the preset discharge pressure range again, the opening of the self-adjusted gas pipe regulating valve and the high and low pressure gas pipe regulating valve is readjusted again until the compressor discharge pressure no longer deviates from the preset discharge pressure range.

6. Air conditioning system, including: Outdoor unit, which includes a compressor; An air-cooled module is provided, which is equipped with an air-cooled module heat exchanger. The air-cooled module heat exchanger is correspondingly equipped with an air-cooled module electronic expansion valve. The outdoor unit and the air-cooled module are connected by a gas pipe and a liquid pipe. and The water module is connected to the outdoor unit via a gas-side branch and a liquid-side branch; Its characteristic is that it further includes: A tracheal regulating valve, wherein the tracheal regulating valve is disposed on the tracheal tube; and The processing device is configured to adjust the opening of the gas pipe regulating valve from a preset opening degree until the compressor discharge pressure no longer deviates from the preset discharge pressure range, provided that only the water module is operating for heating and the compressor discharge pressure deviates from the preset discharge pressure range.

7. The air conditioning system according to claim 6, characterized in that, The processing device is configured to, under the conditions that only the water module is operating for heating, maintain only the water module operating for heating for more than a first set time, and the compressor discharge pressure is higher than the upper limit threshold of the preset discharge pressure range, increase the opening of the gas pipe regulating valve from the opening until the compressor discharge pressure decreases to below the upper limit threshold of the preset discharge pressure range.

8. The air conditioning system according to claim 7, characterized in that, The processing device is configured to, after the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range, invoke a preset intervention target subcooling degree and obtain the real-time subcooling degree of the air-cooled module heat exchanger; and, when the real-time subcooling degree deviates from the intervention target subcooling degree, adjust the opening of the air-cooled module electronic expansion valve so that the real-time subcooling degree transitions to the intervention target subcooling degree.

9. The air conditioning system according to claim 8, characterized in that, The processing device is configured to, after the compressor discharge pressure drops below the upper limit threshold of a preset discharge pressure range, invoke a preset intervention target subcooling degree and obtain the real-time subcooling degree of the air-cooled module heat exchanger; and, when the real-time subcooling degree is higher than the intervention target subcooling degree, increase the opening of the electronic expansion valve of the air-cooled module so that the real-time subcooling degree transitions to the intervention target subcooling degree; or, when the real-time subcooling degree is lower than the intervention target subcooling degree, decrease the opening of the electronic expansion valve of the air-cooled module so that the real-time subcooling degree transitions to the intervention target subcooling degree.

10. The air conditioning system according to claim 8 or 9, characterized in that, The processing device is configured to maintain the opening of the adjusted gas pipe regulating valve unchanged after the compressor discharge pressure drops below the upper limit threshold of the preset discharge pressure range; and under the conditions that only the water module is operating for heating, the operation of only the water module for heating exceeds a second set time, and the compressor discharge pressure deviates from the preset discharge pressure range again, the opening of the self-adjusted gas pipe regulating valve and the high and low pressure gas pipe regulating valve is readjusted again until the compressor discharge pressure no longer deviates from the preset discharge pressure range.

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