Control method and control system for air suction operation with liquid of air conditioning system and electronic equipment

Abstract

The invention provides a control method and system for air-conditioning system air-suction liquid-carrying operation and electronic equipment. The control method for air-conditioning system air-suction liquid-carrying operation comprises the steps that parameter standard values of refrigerants in an air-conditioning system are determined; the air conditioning system is controlled to work under a set load or a default load so as to obtain operation parameters of a refrigerant; on the basis of the operation parameters and the parameter standard values, whether the air conditioning system has the air suction liquid carrying condition or not is judged; and under the condition that it is judged that the air conditioning system is in the air suction liquid carrying condition, the air conditioning system is controlled to reduce the load to work, and the step of obtaining the operating parameters of the refrigerant is executed again. According to the control method, the problem of liquid carrying in air suction can be solved without shutdown in the operation process, certain indoor requirements are met under the condition that an air conditioner system is greatly protected, the problem of liquid carrying in air suction is solved at a time, and the cost is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment control, and in particular to a control method, a control system and electronic equipment for air-conditioning system suction and liquid-carrying operation. Background Art

[0002] In refrigeration and air conditioning systems, water machines are important refrigeration equipment, and their stable operation is directly related to the performance and efficiency of the entire system. However, during the operation of water machines, the problem of compressor suction liquid has always been a problem that has troubled system designers and operation and maintenance personnel. The problem of compressor suction liquid mainly stems from the refrigerant evaporation process in the falling film heat exchanger. In the falling film heat exchanger, the refrigerant liquid evaporates to form refrigerant gas, but some unevaporated refrigerant liquid may be brought into the compressor along with the refrigerant gas. Since the liquid is incompressible, when these liquids enter the compressor cylinder, they will be forcibly compressed by the piston, resulting in strong impact and impact force. This impact force will not only cause severe vibration of the fuselage, but in severe cases, it will even cause overall damage to the compressor. In the traditional product design process, designers usually design the structure of the falling film heat exchanger based on experience, and optimize product performance through continuous structural updates. However, due to the complex multiphase flow and phase change process involved in the falling film heat exchanger, and the internal flow field is not visualized, it is difficult to achieve ideal working conditions in actual operation, and the problem of suction liquid is difficult to avoid.

[0003] When the product has the problem of suction liquid in actual operation, the usual practice is to stop the machine for inspection and contact the manufacturer to solve it. However, this practice has many disadvantages. First, due to the delay in discovery, damage to system components such as the compressor may have already occurred; second, sudden shutdown will cause the indoor environment to fail to meet comfort requirements, affecting user experience. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention proposes a control method for the operation of an air conditioning system with air suction and liquid, which solves the problem of untimely detection of air suction and liquid in the air conditioning system and the problem of affecting the normal operation of the air conditioning system during the detection process.

[0005] According to the first aspect of the present invention, a control method for the air-conditioning system to operate with liquid inhalation is provided, comprising: Determine the standard values of refrigerant parameters in air conditioning systems; Control the air conditioning system to work under the set load or default load to obtain the operating parameters of the refrigerant; Based on the operating parameters and the standard values of the parameters, determining whether the air conditioning system has liquid in the air; When it is determined that the air-conditioning system is in the situation of liquid carry-over during suction, control the air-conditioning system to operate with a reduced load and return to the step of obtaining the operating parameters of the refrigerant.

[0006] The control method for the operation of the air-conditioning system with liquid carry-over during suction provided by the present invention can solve the problem of liquid carry-over during suction without shutting down during operation, greatly protect the air-conditioning system, meet certain indoor requirements, solve the problem of liquid carry-over during suction at one time, and greatly reduce the cost.

[0007] According to an embodiment of the present invention, the control method for the operation of the air-conditioning system with liquid carry-over during suction further includes: When it is determined that the air-conditioning system is not in the situation of liquid carry-over during suction, control the air-conditioning system to continue to operate at the current load.

[0008] The control method for the operation of the air-conditioning system with liquid carry-over during suction provided by the present invention makes the control method for the operation of the air-conditioning system with liquid carry-over during suction more perfect, and can improve the user experience while ensuring the stable operation of the system.

[0009] According to an embodiment of the present invention, the operating parameters include one or more combinations of refrigerant flow rate, refrigerant gas-liquid physical properties, and phase fraction.

[0010] The monitoring and analysis of these parameters in the embodiments of the present invention are of great significance for ensuring the stable operation of the air-conditioning system, optimizing the system design, and solving the problem of liquid carry-over during suction.

[0011] According to an embodiment of the present invention, the step of determining the parameter standard value of the refrigerant in the air-conditioning system includes: Obtain the physical property parameter table of the refrigerant in the air-conditioning system; Based on the physical property parameter table, determine the parameter standard value of the refrigerant.

[0012] The control method for the operation of the air-conditioning system with liquid carry-over during suction provided by the present invention can accurately determine the parameter standard value of the refrigerant in the air-conditioning system, providing a basis for subsequent monitoring and judgment of operating parameters.

[0013] According to an embodiment of the present invention, the step of controlling the air-conditioning system to operate with a reduced load and returning to the step of obtaining the operating parameters of the refrigerant includes: When the current operating load of the air-conditioning system is greater than 0%, control the air-conditioning system to operate with a reduced load; Return to the step of obtaining the operating parameters of the refrigerant to re-based on the operating parameters and the parameter standard value; Re-determine whether there is liquid carry-over during suction in the air-conditioning system until the operating load of the air-conditioning system is 0% or it is determined that the air-conditioning system is not in the situation of liquid carry-over during suction.

[0014] According to an embodiment of the present invention, the set load includes 0% to 100% of the operating load, and the default loads include 0%, 20%, 40%, 60%, 80%, and 100% of the operating load.

[0015] In an embodiment of the present invention, by means of gradually reducing the load in this way, the system can attempt to solve the problem of liquid entrainment in suction without shutting down the machine, while ensuring that the requirements of the indoor environment are met to a certain extent. This control method not only improves the operating stability and reliability of the system, but also reduces the maintenance cost.

[0016] According to an embodiment of the present invention, the air conditioning system is a water chiller system, and the water chiller system includes a sensor, a falling film heat exchanger, and a compressor; A cavity is formed in the falling film heat exchanger, a liquid baffle is provided in the cavity, an air outlet hole communicating with the compressor is provided on the liquid baffle, wing plates extending towards the side wall of the cavity are connected to both sides of the liquid baffle, and the sensor is provided on the wing plates and / or the liquid baffle for obtaining the operating parameters of the refrigerant.

[0017] In an embodiment of the present invention, the operating parameters of the refrigerant in the falling film heat exchanger can be monitored in real time and accurately, providing a strong guarantee for the stable operation of the air conditioning system.

[0018] According to the control system for the liquid entrainment operation of the air conditioning system provided in the second aspect embodiment of the present invention, it includes: A determination module for determining the parameter standard value of the refrigerant in the air conditioning system; An acquisition module for controlling the air conditioning system to operate at a set load or a default load to obtain the operating parameters of the refrigerant; a judgment module for judging whether there is a liquid entrainment situation in the air conditioning system based on the operating parameters and the parameter standard value; an adjustment module for controlling the air conditioning system to reduce the load and operate in the case of judging that the air conditioning system is in a liquid entrainment situation, and returning to the step of obtaining the operating parameters of the refrigerant.

[0019] According to the electronic device provided in the third aspect embodiment of the present invention, it includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the program, it implements the control method for the liquid entrainment operation of the air conditioning system.

[0020] The fourth aspect embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the control method for the liquid entrainment operation of the air conditioning system.

[0021] A fifth aspect of the present invention further provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions that, when executed by a computer, enable the computer to execute the control method for the air-conditioning system to operate with liquid suction in the suction line.

[0022] The control method for the air-conditioning system to operate with liquid suction in the suction line provided by the present invention determines whether there is liquid suction in the air-conditioning system by comparing the operating parameters of the air-conditioning system with the standard parameter values. When it is determined that the air-conditioning system is in a state of liquid suction in the suction line, the air-conditioning system is controlled to reduce the load and operate, and at the same time, it returns to re-judge. Through the above solution, the problem of liquid suction in the suction line can be solved without shutting down during operation, which greatly protects the air-conditioning system and meets certain indoor requirements, achieving a one-time solution to the problem of liquid suction in the suction line and greatly reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a flowchart of the control method for the air-conditioning system to operate with liquid suction in the suction line provided by the embodiment of the present invention.

[0025] Figure 2 It is the overall flowchart of the control method for the air-conditioning system to operate with liquid suction in the suction line provided by the embodiment of the present invention.

[0026] Figure 3 It is a schematic diagram of the air-conditioning system provided by the embodiment of the present invention.

[0027] Figure 4 It is a schematic structural diagram of the control system provided by the embodiment of the present invention.

[0028] Figure 5 It is a schematic structural diagram of the electronic device provided by the embodiment of the present invention.

[0029] REFERENCE SIGNS: 1, falling film heat exchanger; 2, air outlet; 3, liquid baffle; 4, wing plate; 5, first monitoring point; 6, second monitoring point; 410, determination module; 420, acquisition module; 430, judgment module; 440, adjustment module; 510, processor; 520, communication interface; 530, memory; 540, communication bus. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the objectives, technical solutions, and advantages of the invention clearer, the following will clearly describe the technical solutions in the invention in conjunction with the accompanying drawings in the invention. Obviously, the described embodiments are some, but not all, of the embodiments of the invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the invention without creative efforts fall within the scope of protection of the invention.

[0031] A control method for the air-conditioning system to operate with liquid carryover in suction according to the first aspect embodiment of the present invention. As Figure 1 and Figure 2 shown, the control method for the air-conditioning system to operate with liquid carryover in suction includes the following steps: Step S110: Determine the parameter standard values of the refrigerant in the air-conditioning system.

[0032] In actual operation, in order to set the "normal" or "desired" values of one or more refrigerant parameters for subsequent comparison with the actual parameters during operation. Determine the ideal values of the refrigerant parameters under different loads and operating conditions through experiments or simulations. Considering factors such as ambient temperature, humidity, the model and specifications of the air-conditioning system, etc., set one or more parameter standard values, such as refrigerant temperature, pressure, flow rate, etc.

[0033] Step S120: Control the air-conditioning system to operate under a set load or a default load to obtain the operating parameters of the refrigerant.

[0034] After obtaining the parameter standard values, let the air-conditioning system operate under the set load or the default load, and collect the actual operating parameters of the refrigerant at this time.

[0035] Specifically, set or select a specific load value (for example, 50% of the operating load). Start the air-conditioning system and let it run for a period of time so that the system reaches a stable state. Use sensors or other measuring devices to collect the operating parameters of the refrigerant.

[0036] Step S130: Based on the operating parameters and the parameter standard values, determine whether there is a situation of liquid carryover in suction in the air-conditioning system.

[0037] After determining the operating parameters and the parameter standard values, compare the actual operating parameters with the parameter standard values to determine whether there is a problem of liquid carryover in suction in the air-conditioning system.

[0038] In the specific determination process, an algorithm or logic can be written to compare the actual parameters with the standard values. For example, set one or more thresholds based on the parameter standard values, and when the actual parameters exceed these thresholds, it is determined as liquid carryover in suction. Liquid carryover in suction may be manifested as an abnormally low refrigerant temperature, large pressure fluctuations, etc.

[0039] Step S140: When it is determined that the air conditioning system is in the situation of liquid carry - over in suction, control the air conditioning system to operate with reduced load, and return to the step of obtaining the operating parameters of the refrigerant.

[0040] If liquid carry - over in suction is detected, try to solve the problem by reducing the load of the air conditioning system, and collect the operating parameters of the refrigerant again for verification.

[0041] Specifically, when liquid carry - over in suction is detected, the operating parameters within half an hour are automatically saved at this time, and the load of the air conditioning system is reduced automatically or manually (for example, reduced to 30% of the full load). Let the air conditioning system operate at the new load for a period of time, and re - collect the operating parameters of the refrigerant. Repeat step S130 to verify whether reducing the load has solved the problem of liquid carry - over in suction. If the problem still exists, it may be necessary to further reduce the load or take other measures (such as adjusting the refrigerant flow rate, checking system components, etc.).

[0042] The control method for the operation of the air conditioning system with liquid carry - over in suction provided by the present invention determines whether there is liquid carry - over in the air conditioning system by comparing the operating parameters of the air conditioning system with the standard parameter values. When it is determined that the air conditioning system is in the situation of liquid carry - over in suction, control the air conditioning system to operate with reduced load, and at the same time return to make a new judgment. Through the above - mentioned solution, it is possible to solve the problem of liquid carry - over in suction without shutting down during operation, greatly protecting the air conditioning system while meeting certain indoor requirements, achieving a one - time solution to the problem of liquid carry - over in suction, and greatly reducing the cost.

[0043] In some embodiments, as Figure 1 and Figure 2 shown, the control method for the operation of the air conditioning system with liquid carry - over in suction further includes: Step S150: When it is determined that the air conditioning system is not in the situation of liquid carry - over in suction, control the air conditioning system to continue operating at the current load.

[0044] In this embodiment, when the operating parameters of the refrigerant are within the normal range, that is, when there is no liquid carry - over in the air conditioning system, the air conditioning system can continue to maintain the current working state without additional adjustment or intervention. This not only reduces unnecessary operations but also ensures that the air conditioning system can continuously and stably provide a comfortable indoor environment for users.

[0045] In addition, by continuously monitoring the operating parameters of the refrigerant, the air conditioning system can timely detect and respond to potential problems, thus avoiding system damage or performance degradation caused by failure to detect problems in time. This active monitoring and adjustment method makes the air conditioning system more intelligent and reliable, providing users with a better quality of use experience.

[0046] In summary, the solution of this embodiment makes the control method for the air-conditioning system to operate with liquid in the suction more perfect, and can improve the user experience while ensuring the stable operation of the system.

[0047] It should be noted that the operating parameters include one or a combination of refrigerant flow rate, refrigerant gas-liquid physical properties, phase fraction, refrigerant flow field conditions, and corresponding flow rate distributions.

[0048] Among them, the refrigerant flow rate represents the flow velocity of the refrigerant in the refrigeration system, usually expressed in mass flow rate or volume flow rate, with the unit of kg / s or m 3 / s. The refrigerant gas-liquid physical properties represent the physical properties of the refrigerant in the gaseous and liquid states, such as density, specific heat capacity, thermal conductivity, etc. The phase fraction is one of the important parameters characterizing the characteristics of multiphase flow and is an important index in the research of multiphase flow measurement technology. The refrigerant flow field conditions describe the flow state and distribution of the refrigerant in the refrigeration system. The flow rate distribution is the distribution of the refrigerant flow rate at different positions or regions in the air-conditioning system.

[0049] In some embodiments, step S110: The step of determining the parameter standard value of the refrigerant in the air-conditioning system includes: Step S1110: Obtain the physical property parameter table of the refrigerant in the air-conditioning system.

[0050] Step S1120: Based on the physical property parameter table, determine the parameter standard value of the refrigerant.

[0051] During operation, the air-conditioning system will first access the pre-stored physical property parameter table of the refrigerant. These physical property parameter tables usually contain the physical property data of different refrigerants under different conditions such as temperature and pressure, such as density, specific heat capacity, thermal conductivity, viscosity, etc. These data are the basis for determining the parameter standard value of the refrigerant.

[0052] The method of obtaining the physical property parameter table can be diverse. For example, it can be obtained by referring to relevant manuals, databases or through online services, etc. For some complex refrigerants, it may be necessary to obtain their physical property parameter tables through experiments or simulations.

[0053] After obtaining the physical property parameter table of the refrigerant, appropriate parameter values will be selected from the physical property parameter table as the parameter standard value of the refrigerant according to the actual operating conditions and requirements. These standard values may include the flow rate, gas-liquid physical properties, phase fraction, etc. of the refrigerant at a specific temperature and pressure.

[0054] During the process of determining the parameter standard value, various factors such as design requirements, operating environment, and load conditions need to be considered. Generally speaking, the parameter standard value should be able to ensure that the system has good performance and stability under normal operating conditions, and at the same time, the safety and reliability of the system need to be considered.

[0055] Through these two sub-steps, the standard parameter values of the refrigerant in the air-conditioning system can be accurately determined, providing a basis for subsequent monitoring and judgment of operating parameters.

[0056] In some embodiments, controlling the air-conditioning system to operate with reduced load and returning to the step of obtaining the operating parameters of the refrigerant includes: Step S1410: When the current operating load of the air-conditioning system is greater than 0%, control the air-conditioning system to operate with reduced load.

[0057] Step S1420: Return to the step of obtaining the operating parameters of the refrigerant to re-based on the operating parameters and the parameter standard values.

[0058] Step S1430: Re-judge whether there is liquid carry-over in the suction of the air-conditioning system until the operating load of the air-conditioning system is 0% or it is determined that the air-conditioning system is not in a state of liquid carry-over in the suction.

[0059] Specifically, when the air-conditioning system detects the situation of liquid carry-over in the suction and the current operating load of the system is greater than 0% (i.e., the system is still running), the air-conditioning system will first try to reduce the flow rate and pressure of the refrigerant by reducing the load, thereby reducing the possibility of liquid carry-over in the suction. The degree of load reduction may be determined according to the specific situation of the system and the set strategy.

[0060] After reducing the load, the system will execute the step of obtaining the operating parameters of the refrigerant again. These operating parameters may include refrigerant flow rate, refrigerant gas-liquid physical properties, phase fraction, refrigerant flow field conditions, and corresponding flow rate distributions, etc. The system will re-collect the data of these parameters for subsequent analysis and judgment.

[0061] After obtaining the new operating parameters, the system will again judge whether there is still a situation of liquid carry-over in the suction of the air-conditioning system based on these parameters and the previously determined parameter standard values. If the system still detects liquid carry-over in the suction but the operating load has not dropped to 0%, the system will continue to reduce the load, automatically save the operating parameters within half an hour, and repeat steps S1420 and S1430 until the system judges that there is no longer a situation of liquid carry-over in the suction or the operating load has dropped to 0%.

[0062] If during the process of reducing the load, the system judges that there is no longer a situation of liquid carry-over in the suction of the air-conditioning system, then the system will continue to operate at the current load level. If the load has dropped to 0% but the system still detects liquid carry-over in the suction, an alarm is required to shut down the entire air-conditioning system for repair. At this time, the operating parameters within half an hour are automatically saved, and measures such as air-conditioning system maintenance or component replacement may be involved.

[0063] Under normal circumstances, the set load refers to different load levels artificially set for testing and debugging the performance of the air-conditioning system. These levels usually cover 0% to 100% of the operating load of the air conditioner. Within this range, multiple specific load points can be set to evaluate the system's performance under different working conditions. The default load refers to the default operating load level of the air-conditioning system without special settings. In this embodiment, the default load includes several key percentage points of the operating load, namely 0%, 20%, 40%, 60%, 80%, and 100%. These points represent the typical operating states of the air-conditioning system at different load levels, which helps to quickly locate problems during debugging and operation. When controlling the air-conditioning system to reduce the load for operation and returning to the step of obtaining the operating parameters of the refrigerant, if the system detects liquid carry-over in the suction, it will first attempt to reduce the load to the next default load point (such as from 100% to 80%). Then, the system will obtain the operating parameters of the refrigerant again and re-judge whether there is liquid carry-over in the air-conditioning system based on these parameters and the standard parameter values. If the system still detects liquid carry-over after reducing the load, the system will continue to reduce the load to the next lower default load point (such as from 80% to 60%) and repeat the above process. This process will continue until the system determines that the air-conditioning system is no longer in a state of liquid carry-over in the suction, or the operating load of the system has dropped to the lowest point (i.e., 0%).

[0064] By this way of gradually reducing the load, the system can attempt to solve the problem of liquid carry-over in the suction without shutting down, while ensuring that the requirements of the indoor environment are met to a certain extent. This control method not only improves the operating stability and reliability of the system, but also reduces the maintenance cost and improves the overall economic efficiency.

[0065] As Figure 3 shown, the air-conditioning system is a water chiller system. The water chiller system includes a sensor, a falling film heat exchanger 1, and a compressor; a cavity is formed in the falling film heat exchanger 1, and a liquid baffle 3 is provided in the cavity. A plurality of air holes 2 communicating with the compressor are provided on the liquid baffle 3. Wings 4 extending towards the side wall of the cavity are connected to both sides of the liquid baffle 3. Sensors are provided on the wings 4 and / or the liquid baffle 3. The sensors are generally installed at the tip position of the wings 4 and the spaced position of the liquid baffle 3 to obtain the operating parameters of the refrigerant.

[0066] In this embodiment, strain gauges are used as sensors. The strain gauges are installed on the wing plate 4 and the liquid baffle 3 to monitor structural deformation or stress changes caused by refrigerant flow, vibration, temperature changes, etc. These changes can indirectly reflect the operating parameters of the refrigerant, such as flow rate, pressure, etc. The material selection of the strain gauges is very important, and its stability, electrical properties, and refrigerant corrosion resistance need to be considered. A first monitoring point 5 is provided on the wing plate 4, and a second monitoring point 6 is provided on the liquid baffle 3. A plurality of strain gauges are respectively arranged at the first monitoring point 5 and the second monitoring point 6, and the number of monitors is determined according to the length of the falling film heat exchanger. Generally, a strain gauge is arranged at an interval of 5 positions of the air outlet holes 2.

[0067] During the process of adjusting the liquid carry-over in the suction of the air-conditioning system, strain gauges are pre-installed at the tip position of the wing plate 4 and the spaced position of the liquid baffle 3 of the falling film heat exchanger, and it is ensured that they are reliably connected to the control system. Start the air-conditioning system and start collecting the data generated by the strain gauges. These data will reflect the operating parameters of the refrigerant in the falling film heat exchanger. Analyze the collected data, and judge whether there is liquid carry-over or other abnormal conditions in the air-conditioning system according to the preset parameter standard values. If it is found that there are abnormalities in the air-conditioning system, the problem can be tried to be solved by adjusting the system parameters (such as load, flow rate, etc.). During the entire operation process, continuously monitor the data generated by the strain gauges, and take corresponding control measures as needed to ensure the stable operation of the air-conditioning system.

[0068] By this method, the operating parameters of the refrigerant in the falling film heat exchanger can be monitored in real time and accurately, providing a strong guarantee for the stable operation of the air-conditioning system.

[0069] According to the control system for the liquid carry-over operation in the suction of the air-conditioning system provided by the second aspect embodiment of the present invention, please refer to Figure 4 , including: A determination module 410, configured to determine the parameter standard value of the refrigerant in the air-conditioning system.

[0070] An acquisition module 420, configured to control the air-conditioning system to operate under a set load or a default load to acquire the operating parameters of the refrigerant.

[0071] A judgment module 430, configured to judge whether there is liquid carry-over in the air-conditioning system based on the operating parameters and the parameter standard value.

[0072] An adjustment module 440, configured to control the air-conditioning system to operate with a reduced load and return to the step of acquiring the operating parameters of the refrigerant when it is judged that the air-conditioning system is in a liquid carry-over situation.

[0073] It should be noted that the above steps S110 to S140, as well as other steps, are only for convenient expression and do not constitute a timing limitation on the steps in the method. There are detailed descriptions therein, and all the contents in the method are also applicable to the embodiments provided in the first aspect. Therefore, in order to avoid repeated elaboration, they are not detailed in the control system provided in the second aspect. Similarly, the contents in the above two aspects of the embodiments can be used to explain the contents of all subsequent aspects of the embodiments. Therefore, the repeated contents in the subsequent embodiments are not elaborated. According to the control system provided by the embodiments of the present invention, its technical effects correspond to those of the above method and will not be elaborated herein.

[0074] The control system for the air-conditioning system to operate with liquid suction provided by the present invention determines whether there is a liquid suction situation in the air-conditioning system by comparing the operating parameters of the air-conditioning system with the parameter standard values. When it is determined that the air-conditioning system is in a liquid suction situation, the air-conditioning system is controlled to operate at a reduced load, and at the same time, it returns to make a new judgment. Through the above solution, the problem of liquid suction can be solved without shutting down during operation, which greatly protects the air-conditioning system and meets certain indoor requirements, achieving a one-time solution to the liquid suction problem and greatly reducing costs.

[0075] Figure 5 FIG. shows a schematic physical structure diagram of an electronic device, which may include: a processor 510, a communication interface 520, a memory 530, and a communication bus 540. Among them, the processor 510, the communication interface 520, and the memory 530 communicate with each other through the communication bus 540. The processor 510 can call the logical instructions in the memory 530 to execute the control method for the air-conditioning system to operate with liquid suction. The method includes: determining the parameter standard value of the refrigerant in the air-conditioning system; controlling the air-conditioning system to operate at a set load or a default load to obtain the operating parameters of the refrigerant; based on the operating parameters and the parameter standard value, determining whether there is a liquid suction situation in the air-conditioning system; when it is determined that the air-conditioning system is in a liquid suction situation, controlling the air-conditioning system to operate at a reduced load and returning to the step of obtaining the operating parameters of the refrigerant.

[0076] In addition, when the logical instructions in the above-mentioned memory 530 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-transitory computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs.

[0077] Furthermore, an embodiment of the present invention discloses a computer program product. The computer program product includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the control method provided in each of the above method embodiments. The control method includes: determining a parameter standard value of a refrigerant in an air-conditioning system; controlling the air-conditioning system to operate under a set load or a default load to obtain operating parameters of the refrigerant; based on the operating parameters and the parameter standard value, determining whether there is a liquid suction situation in the air-conditioning system; in the case where it is determined that the air-conditioning system is in a liquid suction situation, controlling the air-conditioning system to operate with a reduced load and returning to the step of obtaining the operating parameters of the refrigerant.

[0078] The foregoing is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A control method for the operation of an air-conditioning system with liquid carryover in suction, characterized in that, Including: Determine the parameter standard value of the refrigerant in the air-conditioning system; Control the air-conditioning system to operate under a set load or a default load to obtain the operating parameters of the refrigerant; Based on the operating parameters and the parameter standard value, determine whether there is liquid carry-over in the suction of the air-conditioning system; When it is determined that the air-conditioning system is in a situation of liquid carry-over in the suction, control the air-conditioning system to operate with a reduced load and return to the step of obtaining the operating parameters of the refrigerant.

2. The control method for the air-conditioning system to operate with liquid carry-over in the suction line according to claim 1, characterized in that The control method for the air-conditioning system to operate with liquid carry-over in the suction further includes: When it is determined that the air-conditioning system is not in a situation of liquid carry-over in the suction, control the air-conditioning system to continue to operate under the current load.

3. The control method for the air-conditioning system to operate with liquid carry-over in the suction line according to claim 1, characterized in that, The operating parameters include one or a combination of more of the refrigerant flow rate, refrigerant gas-liquid physical properties, and phase content ratio.

4. The control method for the air-conditioning system to operate with liquid carry-over in suction according to claim 1, characterized in that, The step of determining the parameter standard value of the refrigerant in the air-conditioning system includes: Obtain the physical property parameter table of the refrigerant in the air-conditioning system; Based on the physical property parameter table, determine the parameter standard value of the refrigerant.

5. The control method for the air-conditioning system to operate with liquid carryover in the suction line according to claim 1, wherein, The step of controlling the air-conditioning system to operate with a reduced load and returning to the step of obtaining the operating parameters of the refrigerant includes: When the current operating load of the air-conditioning system is greater than 0%, control the air-conditioning system to operate with a reduced load; Return to the step of obtaining the operating parameters of the refrigerant to re-base on the operating parameters and the parameter standard value; Re-determine whether there is liquid carry-over in the suction of the air-conditioning system until the operating load of the air-conditioning system is 0% or it is determined that the air-conditioning system is not in a situation of liquid carry-over in the suction.

6. The control method for the air-conditioning system to operate with liquid carryover in the suction line according to claim 1, characterized in that, The set load includes 0% to 100% of the operating load, and the default load includes 0% of the operating load, 20% of the operating load, 40% of the operating load, 60% of the operating load, 80% of the operating load, 100% of the operating load.

7. The control method for the air-conditioning system to operate with liquid carryover in suction according to any one of claims 1-6, characterized in that, The air-conditioning system is a water chiller system, and the water chiller system includes a sensor, a falling film heat exchanger, and a compressor; A cavity is formed in the falling film heat exchanger, a liquid baffle is provided in the cavity, an air outlet communicating with the compressor is provided on the liquid baffle, wing plates extending towards the side wall of the cavity are connected to both sides of the liquid baffle, and the sensor is provided on the wing plate and / or the liquid baffle to obtain the operating parameters of the refrigerant.

8. A control system for the operation of an air-conditioning system with liquid carryover during suction, characterized in that, Including: A determination module for determining the parameter standard value of the refrigerant in the air-conditioning system; An acquisition module for controlling the air-conditioning system to operate under a set load or a default load to obtain the operating parameters of the refrigerant; A judgment module for judging whether there is liquid carry-over in the suction of the air-conditioning system based on the operating parameters and the parameter standard value; an adjustment module for controlling the air-conditioning system to operate with a reduced load and returning to the step of obtaining the operating parameters of the refrigerant when it is determined that the air-conditioning system is in a situation of liquid carry-over in the suction.

9. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the control method for the air-conditioning system to operate with liquid carry-over in the suction according to any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the control method for the air-conditioning system to operate with liquid carry-over in the suction according to any one of claims 1 to 7.

11. A computer program product, characterized in that, The computer program product includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions that, when executed by a computer, enable the computer to execute the control method for the air-conditioning system to operate with liquid carryover in the suction as described in any one of claims 1 to 7.

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