Air conditioning chilled water control system, method and central air conditioning

Abstract

The application provides an air conditioner chilled water control system, method and central air conditioner; wherein, in the system, a main control module adjusts chilled water flow entering a main heat exchanger and total chilled water flow according to refrigerant information and total chilled water information, and adjusts sub-chilled water flow entering each water supply sub-circuit according to sub-chilled water information of each water supply sub-circuit according to the characteristics that the lengths of each water supply sub-circuit are inconsistent, so that each chilled water sub-circuit in the central air conditioner heterogeneous pipe network tends to be reasonable flow, temperature difference and high heat exchange efficiency, which is beneficial to stable temperature control and sufficient heat exchange, thereby improving the energy efficiency of the central air conditioner, reducing the energy consumption of the central air conditioner, achieving the intelligent and energy-saving goals of the central air conditioner, and further improving the air conditioner experience of users.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to air conditioning chilled water control systems, methods, and central air conditioning systems. Background Technology

[0002] The existing HVAC piping network for central air conditioning systems mainly includes parallel piping and variable piping. Considering building structure and installation costs, variable piping is more commonly used for water supply networks. Specifically, the pipe lengths of each water supply sub-loop are inconsistent, and due to changes in heat load and other factors, the pressure and flow rate of each sub-loop also differ. It is necessary to frequently adjust the water pressure and flow rate distribution of each sub-loop to ensure a balanced flow rate and avoid under-flow or over-flow situations.

[0003] To avoid undercurrent, existing methods primarily increase the supply pressure of the chilled water pump to ensure the effectiveness of the central air conditioning system. However, this method, due to excessive supply pressure, may cause overcurrent in some sub-loops, leading to a decrease in the temperature difference of the chilled water heat exchange in the sub-loops. The chilled water then returns to the chiller for cooling, which not only greatly reduces the heat exchange efficiency of the chilled water but also wastes electricity in transporting the chilled water, thereby increasing the energy consumption of the central air conditioning system and reducing its energy efficiency. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an air conditioning chilled water control system, method and central air conditioning system to alleviate the above problems, improve the energy efficiency of central air conditioning, thereby reducing the energy consumption of central air conditioning, achieving the goal of intelligent and energy-saving central air conditioning, and thus improving the user's air conditioning experience.

[0005] In a first aspect, embodiments of the present invention provide an air conditioning chilled water control system, comprising: a main control module, a main heat exchanger, and multiple sub-heat exchangers; a refrigerant flow control module and a total chilled water flow control module are respectively arranged between the main control module and the main heat exchanger, and a corresponding sub-loop chilled water flow control module is arranged between the main control module and each sub-heat exchanger; the main control module is used to acquire refrigerant information sent by the refrigerant flow control module and generate a refrigerant control signal based on the refrigerant information; and to send the refrigerant control signal to the refrigerant flow control module so that the refrigerant flow control module adjusts the refrigerant flow into the main heat exchanger according to the refrigerant control signal; wherein the refrigerant information includes: actual refrigerant flow rate, refrigerant inlet temperature, refrigerant outlet temperature, refrigerant inlet pressure, and refrigerant outlet pressure; the main control module is used to acquire the main vessel temperature of the main heat exchanger and the total chilled water information sent by the total chilled water flow control module, and generate a total chilled water flow control signal based on the main vessel temperature and the total chilled water information. The main control module is configured to: receive a total chilled water control signal; and send a total chilled water control signal to a total chilled water flow control module, so that the total chilled water flow control module adjusts the total chilled water flow rate entering the main heat exchanger according to the total chilled water control signal; wherein, the total chilled water information includes: total chilled water inlet temperature, total chilled water outlet temperature, actual total chilled water flow rate, total chilled water inlet pressure, and total chilled water outlet pressure; the main control module is also configured to: acquire the sub-chilled water information sent by each sub-loop chilled water flow control module and the corresponding sub-bottle body temperature of the sub-heat exchanger, and generate a sub-chilled water control signal according to the sub-chilled water information and sub-bottle body temperature; and send the sub-chilled water control signal to the sub-loop chilled water flow control module, so that the sub-loop chilled water flow control module adjusts the sub-chilled water flow rate entering the sub-heat exchanger according to the sub-chilled water control signal; wherein, the sub-chilled water information includes: sub-chilled water inlet temperature, sub-chilled water outlet temperature, actual sub-chilled water flow rate, sub-chilled water inlet pressure, and sub-chilled water outlet pressure.

[0006] The aforementioned chilled water control system adjusts the refrigerant flow rate and total chilled water flow rate entering the main heat exchanger based on refrigerant and total chilled water information, respectively. Furthermore, considering the inconsistent pipe lengths of each water supply sub-loop, it adjusts the sub-chilled water flow rate entering each sub-loop based on its sub-chilled water information. This ensures that each chilled water sub-loop in the central air conditioning network achieves a reasonable flow rate and high heat exchange efficiency with varying temperature differences. This promotes stable temperature control and efficient heat exchange, thereby improving the energy efficiency and reducing the energy consumption of the central air conditioning system. Ultimately, this achieves the goals of intelligent and energy-saving central air conditioning, enhancing the user's air conditioning experience.

[0007] Preferably, the refrigerant flow control module includes: a refrigerant flow meter, a refrigerant flow transmitter, a refrigerant flow regulating valve, a refrigerant flow controller, a refrigerant inlet temperature transmitter, a refrigerant outlet temperature transmitter, a refrigerant inlet pressure transmitter, and a refrigerant outlet pressure transmitter; wherein, the refrigerant flow transmitter, refrigerant inlet temperature transmitter, refrigerant outlet temperature transmitter, refrigerant inlet pressure transmitter, and refrigerant outlet pressure transmitter are all connected to the main control module, the refrigerant flow transmitter is connected to the refrigerant flow meter, the refrigerant flow controller is connected to the refrigerant flow regulating valve, and the refrigerant flow transmitter is connected to the refrigerant flow controller; refrigerant... The refrigerant includes a flow transmitter for real-time detection of the actual refrigerant flow rate into the main heat exchanger via a refrigerant flow meter; a refrigerant inlet temperature transmitter for detecting the refrigerant inlet temperature; a refrigerant outlet temperature transmitter for detecting the refrigerant outlet temperature; a refrigerant inlet pressure transmitter for detecting the refrigerant inlet pressure; a refrigerant outlet pressure transmitter for detecting the refrigerant outlet pressure; and a refrigerant flow controller for controlling the opening of the refrigerant flow regulating valve based on the refrigerant control signal to regulate the refrigerant flow rate into the main heat exchanger.

[0008] Preferably, the refrigerant flow control module further includes a refrigerant flow setting unit and a first adder; wherein, the first adder is disposed on the line between the refrigerant flow transmitter and the refrigerant flow controller, and is connected to the refrigerant flow setting unit and the main control module respectively; the refrigerant flow setting unit is used to set the refrigerant target flow rate and send the refrigerant target flow rate to the refrigerant flow controller; the first adder is used to acquire the actual refrigerant flow rate and the refrigerant control signal, and generate a refrigerant adjustment signal based on the actual refrigerant flow rate and the refrigerant control signal, and send the refrigerant adjustment signal to the refrigerant flow controller; the refrigerant flow controller is also used to control the opening of the refrigerant flow regulating valve according to the refrigerant adjustment signal, so as to regulate the refrigerant flow rate entering the main heat exchanger until the actual refrigerant flow rate reaches the refrigerant target flow rate.

[0009] Preferably, the system further includes a main vessel body temperature transmitter and multiple sub-vessel body temperature transmitters; wherein, the main vessel body temperature transmitter is located at the main heat exchanger, and each sub-vessel body temperature transmitter is located at its corresponding sub-heat exchanger, and both the main vessel body temperature transmitter and the multiple sub-vessel body temperature transmitters are connected to the main control module; the main vessel body temperature transmitter is used to detect the main vessel body temperature of the main heat exchanger and send the main vessel body temperature to the main control module; the sub-vessel body temperature transmitters are used to detect the sub-vessel body temperature of their respective sub-heat exchangers and send the sub-vessel body temperature to the main control module.

[0010] Preferably, the above-mentioned total chilled water flow control module includes: a total chilled water flow meter, a total chilled water flow transmitter, a total chilled water flow regulating valve, a total chilled water flow controller, a total chilled water inlet temperature transmitter, a total chilled water outlet temperature transmitter, a total chilled water inlet pressure transmitter, and a total chilled water outlet pressure transmitter; wherein, the total chilled water flow transmitter, the total chilled water inlet temperature transmitter, the total chilled water outlet temperature transmitter, the total chilled water inlet pressure transmitter, and the total chilled water outlet pressure transmitter are all connected to the main control module, the total chilled water flow transmitter is connected to the total chilled water flow meter, and the total chilled water flow controller is connected to the total chilled water flow regulating valve; the total chilled water flow transmitter is used for... The system includes a total chilled water flow meter to monitor the actual flow rate of total chilled water flowing into the main heat exchanger in real time; a total chilled water inlet temperature transmitter to monitor the inlet temperature of total chilled water flowing into the main heat exchanger; a total chilled water outlet temperature transmitter to monitor the outlet temperature of total chilled water flowing out of the main heat exchanger; a total chilled water inlet pressure transmitter to monitor the inlet pressure of total chilled water flowing into the main heat exchanger; a total chilled water outlet pressure transmitter to monitor the outlet pressure of total chilled water flowing out of the main heat exchanger; and a total chilled water flow controller to control the opening of the total chilled water flow regulating valve according to the total chilled water control signal, thereby regulating the total chilled water flow rate entering the main heat exchanger.

[0011] Preferably, the above-mentioned total chilled water flow control module further includes: a total chilled water temperature setting unit, a total chilled water temperature controller, a second adder, a third adder, and a fourth adder; wherein, the total chilled water temperature setting unit is connected to one end of the total chilled water temperature controller via the second adder, the other end of the total chilled water temperature controller is connected to the total chilled water flow controller via the third adder, the third adder is connected to the main control module via the fourth adder, the fourth adder is also connected to the total chilled water flow transmitter, and the second adder is also connected to the main vessel body temperature transmitter; the total chilled water temperature setting unit is used to set the total chilled water target temperature and send the total chilled water target temperature to the second adder; the second adder is used to adjust the total chilled water flow based on the total chilled water target temperature and the temperature sent by the main vessel body temperature transmitter. The reactor body temperature generates a total chilled water temperature variable, which is then sent to the total chilled water temperature controller. The total chilled water temperature controller generates a total chilled water temperature control signal based on the total chilled water temperature variable and sends this signal to the third adder. The third adder acquires the total chilled water temperature control signal and the total chilled water control signal, generates a total chilled water regulation signal based on these signals, and sends this signal to the total chilled water flow controller. The total chilled water flow controller also controls the opening of the total chilled water flow regulating valve based on the regulation signal to regulate the total chilled water flow rate entering the main heat exchanger until the total chilled water inlet temperature reaches the target temperature.

[0012] Preferably, each of the above-mentioned sub-loop chilled water flow control modules includes: a sub-chilled water flow meter, a sub-chilled water flow transmitter, a sub-chilled water flow regulating valve, a sub-chilled water flow controller, a sub-chilled water inlet temperature transmitter, a sub-chilled water outlet temperature transmitter, a sub-chilled water inlet pressure transmitter, and a sub-chilled water outlet pressure transmitter; wherein, the sub-chilled water flow transmitter, the sub-chilled water inlet temperature transmitter, the sub-chilled water outlet temperature transmitter, the sub-chilled water inlet pressure transmitter, and the sub-chilled water outlet pressure transmitter are all connected to the main control module, the sub-chilled water flow transmitter is connected to the sub-chilled water flow meter, and the sub-chilled water flow controller is connected to the sub-chilled water flow regulating valve; the sub-chilled water flow transmitter is used... The system includes: a chilled water flow meter for real-time monitoring of the actual flow rate of chilled water flowing into the sub-heat exchanger; a chilled water inlet temperature transmitter for monitoring the inlet temperature of chilled water flowing into the sub-heat exchanger; a chilled water outlet temperature transmitter for monitoring the outlet temperature of chilled water flowing out of the sub-heat exchanger; a chilled water inlet pressure transmitter for monitoring the inlet pressure of chilled water flowing into the sub-heat exchanger; a chilled water outlet pressure transmitter for monitoring the outlet pressure of chilled water flowing out of the sub-heat exchanger; and a chilled water flow controller for controlling the opening of the chilled water flow regulating valve according to the chilled water control signal to regulate the flow rate of chilled water entering the sub-heat exchanger.

[0013] Preferably, the sub-loop chilled water flow control module further includes: a sub-chilled water temperature setting unit, a sub-chilled water temperature controller, a fifth adder, a sixth adder, and a seventh adder; wherein, the sub-chilled water temperature setting unit is connected to one end of the sub-chilled water temperature controller via the fifth adder, the other end of the sub-chilled water temperature controller is connected to the sub-chilled water flow controller via the sixth adder, the sixth adder is connected to the main control module via the seventh adder, the seventh adder is also connected to the sub-chilled water flow transmitter, and the fifth adder is also connected to the corresponding sub-vessel body temperature transmitter; the sub-chilled water temperature setting unit is used to set the sub-chilled water target temperature and send the sub-chilled water target temperature to the fifth adder; the fifth adder is used to set the sub-chilled water target temperature and send the sub-chilled water target temperature to the fifth adder; the fifth adder is used to set the sub-chilled water target temperature and send the sub-vessel body temperature transmitter according to the sub-chilled water target temperature and the sub-vessel body temperature transmitter. The temperature of the sub-reactor body generates a sub-chilled water temperature variable, which is then sent to the sub-chilled water temperature controller. The sub-chilled water temperature controller generates a sub-chilled water temperature control signal based on the sub-chilled water temperature variable and sends it to the sixth adder. The sixth adder acquires the sub-chilled water temperature control signal and the sub-chilled water control signal, generates a sub-chilled water regulation signal based on these signals, and sends it to the sub-chilled water flow controller. The sub-chilled water flow controller also controls the opening of the sub-chilled water flow regulating valve based on the sub-chilled water regulation signal to regulate the sub-chilled water flow rate entering the sub-heat exchanger until the sub-chilled water inlet temperature reaches the sub-chilled water target temperature.

[0014] Secondly, embodiments of the present invention also provide an air conditioning chilled water control method, applied to the air conditioning chilled water control system of the first aspect described above; the method includes: acquiring refrigerant information sent by a refrigerant flow control module, and generating a refrigerant control signal based on the refrigerant information; and sending the refrigerant control signal to the refrigerant flow control module, so that the refrigerant flow control module adjusts the refrigerant flow rate entering the main heat exchanger according to the refrigerant control signal; wherein, the refrigerant information includes: actual refrigerant flow rate, refrigerant inlet temperature, refrigerant outlet temperature, refrigerant inlet pressure, and refrigerant outlet pressure; acquiring the main vessel temperature of the main heat exchanger and total chilled water information sent by the total chilled water flow control module, and generating a total chilled water control signal based on the main vessel temperature and the total chilled water information; and sending the total chilled water control signal to the total chilled water flow control module, so that the total chilled water flow rate... The control module adjusts the total chilled water flow rate entering the main heat exchanger according to the total chilled water control signal. The total chilled water information includes: total chilled water inlet temperature, total chilled water outlet temperature, actual total chilled water flow rate, total chilled water inlet pressure, and total chilled water outlet pressure. It acquires the sub-chilled water information and the corresponding sub-bottle temperature of each sub-heat exchanger sent by the sub-loop chilled water flow control module, and generates a sub-chilled water control signal based on the sub-chilled water information and sub-bottle temperature. The control module then sends the sub-chilled water control signal to the sub-loop chilled water flow control module, so that the sub-loop chilled water flow control module adjusts the sub-chilled water flow rate entering that sub-heat exchanger according to the sub-chilled water control signal. The sub-chilled water information includes: sub-chilled water inlet temperature, sub-chilled water outlet temperature, actual sub-chilled water flow rate, sub-chilled water inlet pressure, and sub-chilled water outlet pressure.

[0015] Thirdly, embodiments of the present invention also provide a central air conditioning system, which includes an outdoor unit and the air conditioning chilled water control system described in the first aspect; wherein the outdoor unit is used to transmit refrigerant to the air conditioning chilled water control system.

[0016] The embodiments of the present invention bring the following beneficial effects:

[0017] This invention provides an air conditioning chilled water control system, method, and central air conditioning system. The main control module adjusts the refrigerant flow rate and total chilled water flow rate entering the main heat exchanger based on refrigerant information and total chilled water information, respectively. Furthermore, considering the inconsistent pipe lengths of each water supply sub-loop, the module adjusts the sub-chilled water flow rate entering each sub-loop based on its sub-chilled water information. This ensures that each chilled water sub-loop in the central air conditioning system's cross-loop network achieves a reasonable flow rate, temperature difference, and high heat exchange efficiency, which is beneficial for stable temperature control and sufficient heat exchange. This improves the energy efficiency of the central air conditioning system, reduces its energy consumption, achieves the goals of intelligent and energy-saving central air conditioning, and ultimately enhances the user's air conditioning experience.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific 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 from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an air conditioning chilled water control system provided in an embodiment of the present invention;

[0022] Figure 2 A flowchart of an air conditioning chilled water control method provided in an embodiment of the present invention.

[0023] icon:

[0024] 10-Main control module; 20-Main heat exchanger; 21-Refrigerant inlet; 22-Refrigerant outlet; 23-Total chilled water inlet; 24-Total chilled water outlet; 251-Refrigerant flow meter; 252-Refrigerant flow transmitter; 253-Refrigerant flow regulating valve; 254-Refrigerant flow controller; 255-Refrigerant inlet temperature transmitter; 256-Refrigerant outlet temperature transmitter; 257-Refrigerant inlet pressure transmitter; 258-Refrigerant outlet Pressure transmitter; 259-Refrigerant flow setting unit; 260-First adder; 261-Total chilled water flow meter; 262-Total chilled water flow transmitter; 263-Total chilled water flow regulating valve; 264-Total chilled water flow controller; 265-Total chilled water inlet temperature transmitter; 266-Total chilled water outlet temperature transmitter; 267-Total chilled water inlet pressure transmitter; 268-Total chilled water outlet pressure transmitter; 26 9-Main chilled water temperature setting unit; 270-Main chilled water temperature controller; 271-Second adder; 272-Third adder; 273-Fourth adder; 28-Main vessel body temperature transmitter; 30-Sub-heat exchanger; 31-Sub-chilled water inlet; 32-Sub-chilled water outlet; 33-Sub-vessel body temperature transmitter; 341-Sub-chilled water flow meter; 342-Sub-chilled water flow transmitter; 343-Sub-chilled water flow regulating valve; 344-Sub-chilled water flow controller; 345-Sub-chilled water inlet temperature transmitter; 346-Sub-chilled water outlet temperature transmitter; 347-Sub-chilled water inlet pressure transmitter; 348-Sub-chilled water outlet pressure transmitter; 349-Sub-chilled water temperature setting unit; 350-Sub-chilled water temperature controller; 351-Fifth adder; 352-Sixth adder; 353-Seventh adder; 36-Air temperature transmitter. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] To facilitate understanding of this embodiment, the embodiments of the present invention will be described in detail below.

[0027] Example 1:

[0028] This invention provides an air conditioning chilled water control system, such as... Figure 1As shown, the system includes: a main control module 10, a main heat exchanger 20 and multiple sub-heat exchangers 30, and a refrigerant flow control module and a total chilled water flow control module are respectively provided between the main control module 10 and the main heat exchanger 20, and a corresponding sub-loop chilled water flow control module is provided between the main control module 10 and each sub-heat exchanger 30.

[0029] Specifically, the main control module 10 is used to acquire refrigerant information sent by the refrigerant flow control module and generate a refrigerant control signal based on the refrigerant information; and to send the refrigerant control signal to the refrigerant flow control module so that the refrigerant flow control module adjusts the refrigerant flow rate entering the main heat exchanger according to the refrigerant control signal; wherein, the refrigerant information includes: actual refrigerant flow rate, refrigerant inlet temperature, refrigerant outlet temperature, refrigerant inlet pressure, and refrigerant outlet pressure; in addition, it also acquires the main vessel temperature of the main heat exchanger 20 and the total chilled water information sent by the total chilled water flow control module, and generates a total chilled water control signal based on the main vessel temperature and total chilled water information; and to send the total chilled water control signal to the total chilled water flow control module so that the total chilled water flow control module adjusts the total chilled water flow rate entering the main heat exchanger according to the total chilled water control signal; wherein, the total chilled water information includes: total chilled water inlet temperature, total chilled water outlet temperature, actual total chilled water flow rate, total chilled water inlet pressure, and total chilled water outlet pressure. Therefore, by adjusting the refrigerant flow rate and total chilled water flow rate into the main heat exchanger, the heat exchange efficiency of the refrigerant and chilled water in the main heat exchanger is improved, thereby further improving the energy efficiency of the central air conditioning system.

[0030] Furthermore, the main control module 10 is also used to acquire the sub-chilled water information sent by each sub-loop chilled water flow control module and the corresponding sub-bottle body temperature of the sub-heat exchanger 30, and generate a sub-chilled water control signal based on the sub-chilled water information and the sub-bottle body temperature; and send the sub-chilled water control signal to the sub-loop chilled water flow control module so that the sub-loop chilled water flow control module adjusts the sub-chilled water flow rate entering the sub-heat exchanger according to the sub-chilled water control signal; wherein, the sub-chilled water information includes: sub-chilled water inlet temperature, sub-chilled water outlet temperature, sub-chilled water actual flow rate, sub-chilled water inlet pressure and sub-chilled water outlet pressure.

[0031] Specifically, considering the inconsistent pipe lengths of each water supply sub-loop, the main control module also adjusts the flow rate of the sub-chilled water in the sub-heat exchanger based on the sub-chilled water information sent by the sub-chilled water flow control module of each sub-loop and the sub-bottle temperature of the corresponding sub-heat exchanger. This ensures that each chilled water sub-loop in the central air conditioning network has a reasonable flow rate and high heat exchange efficiency with a temperature difference, which is conducive to stable temperature control and sufficient heat exchange, thereby improving the energy efficiency of the central air conditioning system.

[0032] In summary, the chilled water control system provided by this invention ensures that each chilled water sub-loop in the central air conditioning network has a reasonable flow rate and temperature difference, resulting in high heat exchange efficiency. This improves the energy efficiency of the central air conditioning system, reduces its energy consumption, achieves the goals of intelligent and energy-saving central air conditioning, and ultimately enhances the user's air conditioning experience.

[0033] In practical applications, the heat exchange fluids in the main heat exchanger 20 are primarily refrigerant and chilled water, while the heat exchange fluids in the sub-heat exchanger 30 are primarily chilled water and air. Therefore, if... Figure 1 As shown, the main heat exchanger 20 includes a refrigerant inlet 21, a refrigerant outlet 22, a total chilled water inlet 23, and a total chilled water outlet 24; each sub-heat exchanger 30 also includes a sub-chilled water inlet 31 and a sub-chilled water outlet 32.

[0034] Therefore, the total chilled water, after exchanging heat with the refrigerant in the main heat exchanger 20, flows out along the total chilled water outlet 24 and is distributed to each chilled water sub-loop according to actual needs. For ease of explanation, the chilled water in each chilled water sub-loop is referred to as sub-chilled water. The sub-chilled water enters the corresponding sub-heat exchanger 30 and exchanges heat with the air. There can be multiple chilled water sub-loops, and each chilled water sub-loop may have one sub-heat exchanger 30 or multiple sub-heat exchangers 30, which can be adjusted adaptively according to actual conditions. This embodiment of the invention uses two chilled water sub-loops as an example, and each chilled water sub-loop is equipped with one sub-heat exchanger 30.

[0035] In one implementation, such as Figure 1 As shown, the aforementioned refrigerant flow control module includes: a refrigerant flow meter 251, a refrigerant flow transmitter 252, a refrigerant flow regulating valve 253, a refrigerant flow controller 254, a refrigerant inlet temperature transmitter 255, a refrigerant outlet temperature transmitter 256, a refrigerant inlet pressure transmitter 257, and a refrigerant outlet pressure transmitter 258. Specifically, in the refrigerant flow control module, the refrigerant flow meter 251 and the refrigerant flow regulating valve 253 are connected in series on the refrigerant inlet pipe. The refrigerant flow meter 251 is connected to the refrigerant flow transmitter 252 via a line, and the refrigerant flow regulating valve 253 is connected to the refrigerant flow controller 254 via a line. The refrigerant flow transmitter 252 is connected to the refrigerant flow controller 254 via a line. The refrigerant inlet temperature transmitter 255 and the refrigerant inlet pressure transmitter 257 are located at the refrigerant inlet, and the refrigerant outlet temperature transmitter 256 and the refrigerant outlet pressure transmitter 258 are located at the refrigerant outlet. Furthermore, the refrigerant flow transmitter 252, the refrigerant inlet temperature transmitter 255, the refrigerant outlet temperature transmitter 256, the refrigerant inlet pressure transmitter 257, and the refrigerant outlet pressure transmitter 258 are all connected to the main control module 10 so as to send the corresponding collected parameters to the main control module 10.

[0036] Specifically, the refrigerant flow transmitter 252 is used to detect the actual flow rate of refrigerant flowing into the main heat exchanger 20 in real time via the refrigerant flow meter 251; the refrigerant inlet temperature transmitter 255 is used to detect the refrigerant inlet temperature flowing into the main heat exchanger 20; the refrigerant outlet temperature transmitter 256 is used to detect the refrigerant outlet temperature flowing out of the main heat exchanger 20; the refrigerant inlet pressure transmitter 257 is used to detect the refrigerant inlet pressure flowing into the main heat exchanger 20; the refrigerant outlet pressure transmitter 258 is used to detect the refrigerant outlet pressure flowing out of the main heat exchanger 20; and the refrigerant flow controller 254 is used to control the opening of the refrigerant flow regulating valve 253 according to the refrigerant control signal, so as to regulate the refrigerant flow rate entering the main heat exchanger 20.

[0037] In addition, such as Figure 1 As shown, the refrigerant flow control module further includes a refrigerant flow setting unit 259 and a first adder 260. The first adder 260 is located on the line between the refrigerant flow transmitter 252 and the refrigerant flow controller 254, and is connected to the refrigerant flow setting unit 259 and the main control module 10, respectively. Furthermore, the refrigerant flow controller 254 is also connected to the refrigerant flow meter 251, the refrigerant flow transmitter 252, the refrigerant flow regulating valve 253, and the refrigerant flow setting unit 259 via signal coupling.

[0038] In practical applications, the refrigerant flow setting unit 259 is used to set the target refrigerant flow rate and send the target refrigerant flow rate to the refrigerant flow controller 254; the first adder 260 is used to acquire the actual refrigerant flow rate sent by the refrigerant flow transmitter 252 and the refrigerant control signal sent by the main control module 10, and generate a refrigerant adjustment signal based on the actual refrigerant flow rate and the refrigerant control signal, and send the refrigerant adjustment signal to the refrigerant flow controller 254; at this time, the refrigerant flow controller 254 is also used to control the opening of the refrigerant flow regulating valve 253 according to the refrigerant adjustment signal, so as to regulate the refrigerant flow rate entering the main heat exchanger 20 until the actual refrigerant flow rate reaches the target refrigerant flow rate.

[0039] Therefore, for the adjustment of refrigerant flow, after the refrigerant target flow of the main heat exchanger 20 is preset by the refrigerant flow setting unit 259, the refrigerant flow setting unit 259 transmits the refrigerant target flow to the refrigerant flow controller 254. Under the control of the refrigerant flow controller 254, the refrigerant enters the main heat exchanger 20. During the refrigerant flow process, the refrigerant flow control module sends refrigerant information to the main control module 10. Specifically, the refrigerant flow transmitter 252 sends the actual refrigerant flow rate into the main heat exchanger 20, which is detected in real time by the refrigerant flow meter 251, to the main control module 10; the refrigerant inlet temperature transmitter 255 sends the detected refrigerant inlet temperature into the main heat exchanger 20 to the main control module 10; the refrigerant outlet temperature transmitter 256 sends the detected refrigerant outlet temperature out of the main heat exchanger 20 to the main control module 10; the refrigerant inlet pressure transmitter 257 sends the detected refrigerant inlet pressure into the main heat exchanger 20 to the main control module 10; and the refrigerant outlet pressure transmitter 258 sends the detected refrigerant outlet pressure out of the main heat exchanger 20 to the main control module 10.

[0040] The main control module 10 has a built-in heat exchange and pressure drop principle prediction model. Based on the heat exchange and pressure drop principle prediction model, it analyzes the refrigerant information, including refrigerant temperature, refrigerant pressure, and refrigerant flow rate, generates a refrigerant control signal, and sends the refrigerant control signal to the first adder 260. At the same time, the first adder 260 also acquires the actual refrigerant flow rate sent by the refrigerant flow transmitter 252, and uses the difference signal between the actual refrigerant flow rate and the refrigerant control signal as the refrigerant adjustment signal, which is sent to the refrigerant flow controller 254. At this time, the refrigerant flow controller 254 controls the opening of the refrigerant flow regulating valve 253 according to the refrigerant adjustment signal to adjust the refrigerant flow rate entering the main heat exchanger 20 in real time until the actual refrigerant flow rate reaches the target refrigerant flow rate.

[0041] In one implementation, such as Figure 1 As shown, the system also includes a main vessel body temperature transmitter 28 and multiple sub-vessel body temperature transmitters 33; wherein, the main vessel body temperature transmitter 28 is located at the main heat exchanger 20, and each sub-vessel body temperature transmitter 33 is located at the corresponding sub-heat exchanger 30, and the main vessel body temperature transmitter 28 and multiple sub-vessel body temperature transmitters 33 are all connected to the main control module 10.

[0042] In practical applications, the main vessel temperature transmitter 28 is used to detect the main vessel temperature of the main heat exchanger 20 in real time and send the main vessel temperature to the main control module 10, so that the main control module 10 can control the total chilled water flow rate based on the main vessel temperature and the total chilled water information. Similarly, the sub-vessel temperature transmitter 33 is used to detect the sub-vessel temperature of the corresponding sub-heat exchanger 30 in real time and send the sub-vessel temperature to the main control module 10, so that the main control module 10 can control the sub-chilled water flow rate based on the sub-chilled water information and sub-vessel temperature. Since the pipe length of each sub-loop is different, the sub-chilled water information and sub-vessel temperature of each corresponding sub-loop may also be different. Therefore, the main control module 10 adjusts the sub-chilled water flow rate of each sub-loop based on the sub-chilled water information and sub-vessel temperature, so that each chilled water sub-loop in the central air conditioning network tends to have a reasonable flow rate and high heat exchange efficiency with a temperature difference. This is beneficial for stable temperature control and sufficient heat exchange, thereby improving the energy efficiency of the central air conditioning system and reducing its energy consumption.

[0043] In one embodiment, the above-mentioned total chilled water flow control module includes: a total chilled water flow meter 261, a total chilled water flow transmitter 262, a total chilled water flow regulating valve 263, a total chilled water flow controller 264, a total chilled water inlet temperature transmitter 265, a total chilled water outlet temperature transmitter 266, a total chilled water inlet pressure transmitter 267, and a total chilled water outlet pressure transmitter 268; that is, in the total chilled water flow control module, a total chilled water flow meter 261 and a total chilled water flow regulating valve 263 are connected in series on the total chilled water inlet pipe, and the total chilled water flow meter 261 is connected to the total chilled water flow transmitter 262 via a line. Chilled water flow regulating valve 263 is connected to total chilled water flow controller 264 via a line. Total chilled water inlet temperature transmitter 265 and total chilled water inlet pressure transmitter 267 are located at the total chilled water inlet, and total chilled water outlet temperature transmitter 266 and total chilled water outlet pressure transmitter 268 are located at the total chilled water outlet. In addition, total chilled water flow transmitter 262, total chilled water inlet temperature transmitter 265, total chilled water outlet temperature transmitter 266, total chilled water inlet pressure transmitter 267 and total chilled water outlet pressure transmitter 268 are all connected to main control module 10 so as to send the corresponding collected parameters to main control module 10.

[0044] Specifically, the total chilled water flow transmitter 262 is used to detect the actual flow rate of total chilled water flowing into the main heat exchanger 20 in real time via the total chilled water flow meter 261; the total chilled water inlet temperature transmitter 265 is used to detect the total chilled water inlet temperature flowing into the main heat exchanger 20; the total chilled water outlet temperature transmitter 266 is used to detect the total chilled water outlet temperature flowing out of the main heat exchanger 20; the total chilled water inlet pressure transmitter 267 is used to detect the total chilled water inlet pressure flowing into the main heat exchanger 20; the total chilled water outlet pressure transmitter 268 is used to detect the total chilled water outlet pressure flowing out of the main heat exchanger 20; and the total chilled water flow controller 264 is used to control the opening of the total chilled water flow regulating valve 263 according to the total chilled water control signal, so as to regulate the total chilled water flow rate entering the main heat exchanger 20.

[0045] In addition, such as Figure 1 As shown, the above-mentioned total chilled water flow control module further includes: a total chilled water temperature setting unit 269, a total chilled water temperature controller 270, a second adder 271, a third adder 272, and a fourth adder 273; wherein, the total chilled water temperature setting unit 269 is connected to one end of the total chilled water temperature controller 270 via the second adder 271, the other end of the total chilled water temperature controller 270 is connected to the total chilled water flow controller 264 via the third adder 272, the third adder 272 is connected to the main control module 10 via the fourth adder 273, the fourth adder 273 is also connected to the total chilled water flow transmitter 262, and the second adder 271 is also connected to the main vessel body temperature transmitter 28. In addition, the total chilled water flow controller 264 is also connected to the total chilled water flow meter 261, the total chilled water flow transmitter 262, the total chilled water flow regulating valve 263, the total chilled water temperature controller 270 and the total chilled water temperature setting unit 269 via signal coupling.

[0046] In practical applications, the total chilled water temperature setting unit 269 is used to set the total chilled water target temperature and send the total chilled water target temperature to the second adder 271; the second adder 271 is used to generate a total chilled water temperature variable based on the total chilled water target temperature and the main vessel temperature sent by the main vessel temperature transmitter 28, and send the total chilled water temperature variable to the total chilled water temperature controller 270; the total chilled water temperature controller 270 is used to generate a total chilled water temperature control signal based on the total chilled water temperature variable, and send the total chilled water temperature control signal to the third adder 272; the third adder 272 is used to acquire the total chilled water temperature control signal and the total chilled water control signal, and generate a total chilled water regulation signal based on the total chilled water temperature control signal and the total chilled water control signal, and send the total chilled water regulation signal to the total chilled water flow controller 264; the total chilled water flow controller 264 is also used to control the opening of the total chilled water flow regulating valve according to the total chilled water regulation signal, so as to regulate the total chilled water flow entering the main heat exchanger 20 until the total chilled water inlet temperature reaches the total chilled water target temperature.

[0047] Therefore, regarding the regulation of the total chilled water flow rate, after the total chilled water target temperature of the main heat exchanger 20 is preset through the total chilled water temperature setting unit 269, the total chilled water target temperature is fed back to the total chilled water flow controller 264 via the total chilled water temperature controller 270. Under the control of the total chilled water flow controller 264, the total chilled water flows into the main heat exchanger 20 to exchange heat with the refrigerant. During the heat exchange process, the total chilled water flow control module sends the total chilled water information to the main control module 10, that is, the total chilled water flow transmitter 262 directs the total chilled water detected in real time by the total chilled water flow meter 261 into the main heat exchanger 20. The actual flow rate is sent to the main control module 10; the total chilled water inlet temperature transmitter 265 sends the detected total chilled water inlet temperature flowing into the main heat exchanger 20 to the main control module 10; the total chilled water outlet temperature transmitter 266 sends the detected total chilled water outlet temperature flowing out of the main heat exchanger 20 to the main control module 10; the total chilled water inlet pressure transmitter 267 sends the detected total chilled water inlet pressure flowing into the main heat exchanger 20 to the main control module 10; the total chilled water outlet pressure transmitter 268 sends the detected total chilled water outlet pressure flowing out of the main heat exchanger 20 to the main control module 10.

[0048] The main control module 10 analyzes the total chilled water information, including total chilled water temperature, total chilled water pressure, and total chilled water flow rate, as well as the main vessel temperature, based on a heat exchange and pressure drop principle prediction model. It generates a total chilled water control signal and sends it to the third adder 272. Simultaneously, the third adder 272 also acquires the total chilled water temperature control signal generated by the total chilled water temperature controller 270 based on the total chilled water temperature variable. It uses the difference between the total chilled water temperature control signal and the total chilled water control signal as the total chilled water regulation signal and sends it to the total chilled water flow controller 264. This allows the total chilled water flow controller 264 to control the opening of the total chilled water flow regulating valve according to the total chilled water regulation signal, thereby adjusting the total chilled water flow rate entering the main heat exchanger 20 in real time until the total chilled water inlet temperature reaches the target temperature.

[0049] In addition, the total chilled water flow transmitter 262 also sends the actual total chilled water flow rate into the main heat exchanger 20, which is detected in real time by the total chilled water flow meter 261, to the fourth adder 273. The fourth adder 273 subtracts the actual total chilled water flow rate from the total chilled water control signal sent by the main control module 10 and feeds the subtracted signal back to the third adder 272. The subtracted signal is then superimposed on the total chilled water regulation signal at the third adder 272. This ensures the safety of the total chilled water control process through the various adders and guarantees the accuracy of chilled water control through feedback adjustment of the adders in the event of partial structural failure.

[0050] In one embodiment, since there may be multiple sub-loop chilled water flow control modules, the flow regulation of the sub-chilled water is described here using one sub-loop chilled water flow control module as an example. The flow regulation of the sub-chilled water in other sub-loop chilled water flow control modules can be referred to this sub-loop chilled water flow control module. The embodiments of the present invention will not be described in detail here.

[0051] like Figure 1The sub-loop chilled water flow control module includes: a sub-chilled water flow meter 341, a sub-chilled water flow transmitter 342, a sub-chilled water flow regulating valve 343, a sub-chilled water flow controller 344, a sub-chilled water inlet temperature transmitter 345, a sub-chilled water outlet temperature transmitter 346, a sub-chilled water inlet pressure transmitter 347, and a sub-chilled water outlet pressure transmitter 348; that is, in the sub-loop chilled water flow control module, a sub-chilled water flow meter 341 and a sub-chilled water flow regulating valve 343 are connected in series on the sub-chilled water inlet pipe, and the sub-chilled water flow meter 341 is connected to the sub-chilled water flow transmitter 342 via a line. The chilled water flow regulating valve 343 is connected to the sub-chilled water flow controller 344 via a line. The sub-chilled water inlet temperature transmitter 345 and the sub-chilled water inlet pressure transmitter 347 are located at the sub-chilled water inlet, and the sub-chilled water outlet temperature transmitter 346 and the sub-chilled water outlet pressure transmitter 348 are located at the sub-chilled water outlet. Furthermore, the sub-chilled water flow transmitter 342, the sub-chilled water inlet temperature transmitter 345, the sub-chilled water outlet temperature transmitter 346, the sub-chilled water inlet pressure transmitter 347, and the sub-chilled water outlet pressure transmitter 348 are all connected to the main control module 10 so as to send the corresponding collected parameters to the main control module 10.

[0052] Specifically, the sub-chilled water flow transmitter 342 is used to detect the actual flow rate of sub-chilled water flowing into the sub-heat exchanger 30 in real time via the sub-chilled water flow meter 341; the sub-chilled water inlet temperature transmitter 345 is used to detect the sub-chilled water inlet temperature flowing into the sub-heat exchanger 30; the sub-chilled water outlet temperature transmitter 346 is used to detect the sub-chilled water outlet temperature flowing out of the sub-heat exchanger 30; the sub-chilled water inlet pressure transmitter 347 is used to detect the sub-chilled water inlet pressure flowing into the sub-heat exchanger 30; the sub-chilled water outlet pressure transmitter 348 is used to detect the sub-chilled water outlet pressure flowing out of the sub-heat exchanger 30; and the sub-chilled water flow controller 344 is used to control the opening of the sub-chilled water flow regulating valve 343 according to the sub-chilled water control signal to regulate the sub-chilled water flow rate entering the sub-heat exchanger 30.

[0053] In addition, such as Figure 1As shown, the sub-loop chilled water flow control module further includes: a sub-chilled water temperature setting unit 349, a sub-chilled water temperature controller 350, a fifth adder 351, a sixth adder 352, and a seventh adder 353; wherein, the sub-chilled water temperature setting unit 349 is connected to one end of the sub-chilled water temperature controller 350 via the fifth adder 351, the other end of the sub-chilled water temperature controller 350 is connected to the sub-chilled water flow controller 344 via the sixth adder 352, the sixth adder 352 is connected to the main control module 10 via the seventh adder 353, the seventh adder 353 is also connected to the sub-chilled water flow transmitter 342, and the fifth adder 351 is also connected to the corresponding sub-vessel body temperature transmitter 33. Furthermore, the sub-chilled water flow controller 344 is also connected to the sub-chilled water flow meter 341, the sub-chilled water flow transmitter 342, the sub-chilled water flow regulating valve 343, the sub-chilled water temperature controller 350, and the sub-chilled water temperature setting unit 349 via signal coupling.

[0054] In practical applications, the sub-chilled water temperature setting unit 349 is used to set the sub-chilled water target temperature and send the sub-chilled water target temperature to the fifth adder 351; the fifth adder 351 is used to generate a sub-chilled water temperature variable based on the sub-chilled water target temperature and the sub-vessel body temperature sent by the sub-vessel body temperature transmitter 33, and send the sub-chilled water temperature variable to the sub-chilled water temperature controller 350; the sub-chilled water temperature controller 350 is used to generate a sub-chilled water temperature control signal based on the sub-chilled water temperature variable, and send the sub-chilled water temperature control signal to... The sixth adder 352 is used to acquire the sub-chilled water temperature control signal and the sub-chilled water control signal, generate a sub-chilled water regulation signal based on the sub-chilled water temperature control signal and the sub-chilled water control signal, and send the sub-chilled water regulation signal to the sub-chilled water flow controller 344. The sub-chilled water flow controller 344 is also used to control the opening of the sub-chilled water flow regulating valve 343 based on the sub-chilled water regulation signal, so as to regulate the sub-chilled water flow rate entering the sub-heat exchanger 30 until the sub-chilled water inlet temperature reaches the sub-chilled water target temperature.

[0055] Therefore, for the regulation of the sub-chilled water flow rate, after the sub-chilled water target temperature of the sub-heat exchanger 30 is preset by the sub-chilled water temperature setting unit 349, the sub-chilled water target temperature is fed back to the sub-chilled water flow controller 344 via the sub-chilled water temperature controller 350. Under the control of the sub-chilled water flow controller 344, the sub-chilled water flows into the sub-heat exchanger 30 to exchange heat with the air. During the heat exchange process in the sub-heat exchanger 30, the sub-chilled water flow control module sends the sub-chilled water information to the main control module 10. That is, the sub-chilled water flow transmitter 342 transmits the sub-chilled water flow rate of the sub-heat exchanger 30, which is detected in real time by the sub-chilled water flow meter 341. The actual flow rate of chilled water is sent to the main control module 10; the sub-chilled water inlet temperature transmitter 345 sends the detected sub-chilled water inlet temperature of the sub-chilled water flowing into the sub-heat exchanger 30 to the main control module 10; the sub-chilled water outlet temperature transmitter 346 sends the detected sub-chilled water outlet temperature of the sub-chilled water flowing out of the sub-heat exchanger 30 to the main control module 10; the sub-chilled water inlet pressure transmitter 347 sends the detected sub-chilled water inlet pressure of the sub-chilled water flowing into the sub-heat exchanger 30 to the main control module 10; the sub-chilled water outlet pressure transmitter 348 sends the detected sub-chilled water outlet pressure of the sub-chilled water flowing out of the sub-heat exchanger 30 to the main control module 10.

[0056] The main control module 10 analyzes the sub-chilled water information, including sub-chilled water temperature, sub-chilled water pressure, and sub-chilled water flow rate, as well as the sub-boiler temperature, based on a heat exchange and pressure drop principle prediction model. It generates a sub-chilled water control signal and sends it to the sixth adder 352. Simultaneously, the sixth adder 352 also acquires the sub-chilled water temperature control signal generated by the sub-chilled water temperature controller 350 based on the sub-chilled water temperature variable. It uses the difference between the sub-chilled water temperature control signal and the sub-chilled water control signal as the sub-chilled water adjustment signal and sends it to the sub-chilled water flow controller 344. This allows the sub-chilled water flow controller 344 to control the opening of the sub-chilled water flow regulating valve 343 according to the sub-chilled water adjustment signal, thereby adjusting the sub-chilled water flow rate entering the sub-heat exchanger 30 in real time until the sub-chilled water inlet temperature reaches the sub-chilled water target temperature.

[0057] In addition, the sub-chilled water flow transmitter 342 will also send the actual sub-chilled water flow rate into the sub-heat exchanger 30, which is detected in real time by the sub-chilled water flow meter 341, to the seventh adder 353. The seventh adder 353 will subtract the actual sub-chilled water flow rate from the sub-chilled water control signal sent by the main control module 10, and feed the subtracted signal back to the sixth adder 352. The subtracted signal will then be superimposed on the sub-chilled water regulation signal at the sixth adder 352. This ensures the safety of the sub-chilled water control process through the various adders, and ensures the accuracy of chilled water control through feedback adjustment of the adders in the event of partial structural failure.

[0058] Furthermore, since the sub-heat exchanger 30 is used to realize heat exchange between chilled water and air, an air temperature transmitter 36 is also provided in the direction of its air inlet and connected to the main control module 10 to send the detected air temperature to the main control module 10. At this time, the main control module also analyzes the sub-chilled water information, including sub-chilled water temperature, sub-chilled water pressure and sub-chilled water flow rate, sub-vessel body temperature and air temperature based on the heat exchange and pressure drop principle prediction model, and generates a sub-chilled water control signal, thereby further improving the chilled water control accuracy.

[0059] In summary, the chilled water control system provided in this embodiment of the invention automatically activates when the central air conditioning system is started. The main control module receives refrigerant information, total chilled water information, sub-chilled water information, and the vessel temperature of each heat exchanger, including temperature, pressure, and flow rate. Based on the heat exchange and pressure drop principle prediction model, it analyzes the data and generates corresponding refrigerant control signals, total chilled water control signals, and sub-chilled water control signals to achieve real-time adjustment of refrigerant flow rate, total chilled water flow rate, and sub-chilled water flow rate, avoiding lag.

[0060] Furthermore, the main control module predicts heat changes caused by load and operating condition variations in real time and generates corresponding control signals. These control signals are superimposed with actual flow and temperature changes in the corresponding modules, thus solving the problems of system inertia and time lag, overcoming temperature fluctuations, and achieving precise temperature control. Precise temperature control facilitates automatic and intelligent regulation of heat exchange, improving system control accuracy. At the same time, the central air conditioning system maintains a reasonable temperature difference and flow rate, avoiding overflow and underflow, ensuring that the chilled water is always in a good heat exchange condition, improving heat exchange efficiency, thereby enhancing the overall energy efficiency of the central air conditioning system, reducing energy consumption and waste, and improving energy utilization.

[0061] Furthermore, the system incorporates multiple adders, a control structure that ensures the safety of the control process. Even if part of the main control module fails, the control structure can still maintain a certain level of control, thereby improving the control accuracy of the central air conditioning system. Simultaneously, the system adjusts the flow rate of chilled water entering each water supply sub-loop based on its sub-chilled water information. This ensures that each chilled water sub-loop in the central air conditioning system's cross-loop network achieves a reasonable flow rate and high heat exchange efficiency with varying temperature differences. This promotes stable temperature control and sufficient heat exchange, further improving the energy efficiency of the central air conditioning system, reducing its energy consumption, achieving the goals of intelligent and energy-saving central air conditioning, and ultimately enhancing the user's air conditioning experience.

[0062] Example 2:

[0063] This invention also provides an air conditioning chilled water control method, applied to the aforementioned air conditioning chilled water control system, with the main control module as the executing entity. For example... Figure 2 As shown, the method includes the following steps:

[0064] Step S202: Obtain refrigerant information sent by the refrigerant flow control module, and generate a refrigerant control signal based on the refrigerant information; and send the refrigerant control signal to the refrigerant flow control module so that the refrigerant flow control module adjusts the refrigerant flow into the main heat exchanger according to the refrigerant control signal; wherein, the refrigerant information includes: actual refrigerant flow rate, refrigerant inlet temperature, refrigerant outlet temperature, refrigerant inlet pressure, and refrigerant outlet pressure;

[0065] Step S204: Obtain the main vessel temperature of the main heat exchanger and the total chilled water information sent by the total chilled water flow control module, and generate a total chilled water control signal based on the main vessel temperature and total chilled water information; and send the total chilled water control signal to the total chilled water flow control module so that the total chilled water flow control module adjusts the total chilled water flow into the main heat exchanger according to the total chilled water control signal; wherein, the total chilled water information includes: total chilled water inlet temperature, total chilled water outlet temperature, actual total chilled water flow rate, total chilled water inlet pressure, and total chilled water outlet pressure;

[0066] Step S206: Obtain the sub-chilled water information and the corresponding sub-bottle body temperature of each sub-loop chilled water flow control module, and generate a sub-chilled water control signal based on the sub-chilled water information and sub-bottle body temperature; and send the sub-chilled water control signal to the sub-loop chilled water flow control module so that the sub-loop chilled water flow control module adjusts the sub-chilled water flow rate entering the sub-heat exchanger according to the sub-chilled water control signal; wherein, the sub-chilled water information includes: sub-chilled water inlet temperature, sub-chilled water outlet temperature, sub-chilled water actual flow rate, sub-chilled water inlet pressure, and sub-chilled water outlet pressure.

[0067] The aforementioned chilled water control method ensures that each chilled water sub-loop in the central air conditioning system's cross-flow network achieves high heat exchange efficiency with reasonable flow rates and temperature differences. This improves the energy efficiency of the central air conditioning system, reduces its energy consumption, and achieves the goals of intelligent and energy-saving operation, thereby enhancing the user's air conditioning experience. It should be noted that steps S202 to S206 can be performed simultaneously, or their order can be set according to actual conditions.

[0068] The air conditioning chilled water control method provided in this embodiment of the invention has the same technical features as the air conditioning chilled water control system provided in the above embodiments, so it can also solve the same technical problems and achieve the same technical effects.

[0069] Example 3:

[0070] This invention also provides a central air conditioning system, which includes an outdoor unit and the aforementioned chilled water control system; wherein the outdoor unit is used to transmit refrigerant to the chilled water control system. The specific structure of the outdoor unit can be referenced from existing air conditioners, and will not be described in detail here.

[0071] This invention also provides a central air conditioner, including a processor and a memory. The memory stores machine-executable instructions that can be executed by the processor, and the processor executes the machine-executable instructions to implement the above-described air conditioner chilled water control method.

[0072] This embodiment also provides a machine-readable storage medium storing machine-executable instructions. When the machine-executable instructions are called and executed by a processor, the machine-executable instructions cause the processor to implement the above-described air conditioning chilled water control method.

[0073] The air conditioning chilled water control system, method, and central air conditioning computer program product provided in the embodiments of the present invention include a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods in the preceding method embodiments. For specific implementation, please refer to the method embodiments, which will not be repeated here.

[0074] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0075] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0076] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0077] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0078] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An air conditioning chilled water control system, characterized in that, The system includes: a main control module, a main heat exchanger and multiple sub-heat exchangers, and a refrigerant flow control module and a total chilled water flow control module are respectively provided between the main control module and the main heat exchanger, and a corresponding sub-loop chilled water flow control module is provided between the main control module and each of the sub-heat exchangers. The main control module is used to acquire refrigerant information sent by the refrigerant flow control module and generate a refrigerant control signal based on the refrigerant information; and to send the refrigerant control signal to the refrigerant flow control module so that the refrigerant flow control module adjusts the refrigerant flow into the main heat exchanger according to the refrigerant control signal; wherein, the refrigerant information includes: actual refrigerant flow rate, refrigerant inlet temperature, refrigerant outlet temperature, refrigerant inlet pressure, and refrigerant outlet pressure; The main control module is used to acquire the main vessel temperature of the main heat exchanger and the total chilled water information sent by the total chilled water flow control module, and generate a total chilled water control signal based on the main vessel temperature and the total chilled water information; and to send the total chilled water control signal to the total chilled water flow control module so that the total chilled water flow control module adjusts the total chilled water flow into the main heat exchanger according to the total chilled water control signal; wherein, the total chilled water information includes: total chilled water inlet temperature, total chilled water outlet temperature, actual total chilled water flow rate, total chilled water inlet pressure, and total chilled water outlet pressure; The main control module is further configured to acquire the sub-chilled water information and the corresponding sub-bottle body temperature of each sub-loop chilled water flow control module, and generate a sub-chilled water control signal based on the sub-chilled water information and the sub-bottle body temperature; and send the sub-chilled water control signal to the sub-loop chilled water flow control module so that the sub-loop chilled water flow control module adjusts the sub-chilled water flow rate entering the sub-heat exchanger according to the sub-chilled water control signal; wherein, the sub-chilled water information includes: sub-chilled water inlet temperature, sub-chilled water outlet temperature, sub-chilled water actual flow rate, sub-chilled water inlet pressure, and sub-chilled water outlet pressure; The system also includes a main vessel body temperature transmitter; the main vessel body temperature transmitter is located at the main heat exchanger and connected to the main control module; the main vessel body temperature transmitter is used to detect the main vessel body temperature of the main heat exchanger and send the main vessel body temperature to the main control module; The total chilled water flow control module includes a total chilled water flow meter, a total chilled water flow transmitter, a total chilled water flow regulating valve, a total chilled water flow controller, a total chilled water temperature setting unit, a total chilled water temperature controller, a second adder, a third adder, and a fourth adder. The total chilled water flow transmitter is connected to the main control module; the total chilled water flow transmitter is connected to the total chilled water flow meter; the total chilled water flow controller is connected to the total chilled water flow regulating valve; the total chilled water temperature setting unit is connected to one end of the total chilled water temperature controller via the second adder; the other end of the total chilled water temperature controller is connected to the total chilled water flow controller via the third adder; the third adder is connected to the main control module via the fourth adder; the fourth adder is also connected to the total chilled water flow transmitter; and the second adder is also connected to the main vessel body temperature transmitter. The total chilled water flow transmitter is used to detect the actual flow rate of total chilled water flowing into the main heat exchanger in real time via the total chilled water flow meter. The total chilled water flow controller is used to control the opening of the total chilled water flow regulating valve according to the total chilled water control signal, so as to regulate the total chilled water flow entering the main heat exchanger; The total chilled water temperature setting unit is used to set the total chilled water target temperature and send the total chilled water target temperature to the second adder; The second adder is used to generate a total chilled water temperature variable based on the total chilled water target temperature and the main vessel temperature sent by the main vessel temperature transmitter, and to send the total chilled water temperature variable to the total chilled water temperature controller. The total chilled water temperature controller is used to generate a total chilled water temperature control signal based on the total chilled water temperature variable, and send the total chilled water temperature control signal to the third adder; The third adder is used to acquire the total chilled water temperature control signal and the total chilled water control signal, generate a total chilled water adjustment signal based on the total chilled water temperature control signal and the total chilled water control signal, and send the total chilled water adjustment signal to the total chilled water flow controller; The total chilled water flow controller is also used to control the opening of the total chilled water flow regulating valve according to the total chilled water regulation signal, so as to regulate the total chilled water flow entering the main heat exchanger until the total chilled water inlet temperature reaches the total chilled water target temperature.

2. The system according to claim 1, characterized in that, The refrigerant flow control module includes: a refrigerant flow meter, a refrigerant flow transmitter, a refrigerant flow regulating valve, a refrigerant flow controller, a refrigerant inlet temperature transmitter, a refrigerant outlet temperature transmitter, a refrigerant inlet pressure transmitter, and a refrigerant outlet pressure transmitter; wherein, the refrigerant flow transmitter, the refrigerant inlet temperature transmitter, the refrigerant outlet temperature transmitter, the refrigerant inlet pressure transmitter, and the refrigerant outlet pressure transmitter are all connected to the main control module, the refrigerant flow transmitter is connected to the refrigerant flow meter, the refrigerant flow controller is connected to the refrigerant flow regulating valve, and the refrigerant flow transmitter is connected to the refrigerant flow controller; The refrigerant flow transmitter is used to detect the actual flow rate of refrigerant flowing into the main heat exchanger in real time through the refrigerant flow meter; The refrigerant inlet temperature transmitter is used to detect the refrigerant inlet temperature as the refrigerant flows into the main heat exchanger; The refrigerant outlet temperature transmitter is used to detect the refrigerant outlet temperature at which the refrigerant flows out of the main heat exchanger. The refrigerant inlet pressure transmitter is used to detect the refrigerant inlet pressure as refrigerant flows into the main heat exchanger; The refrigerant outlet pressure transmitter is used to detect the refrigerant outlet pressure when the refrigerant flows out of the main heat exchanger; The refrigerant flow controller is used to control the opening degree of the refrigerant flow regulating valve according to the refrigerant control signal, so as to regulate the refrigerant flow entering the main heat exchanger.

3. The system according to claim 2, characterized in that, The refrigerant flow control module further includes a refrigerant flow setting unit and a first adder; wherein, the first adder is disposed on the line between the refrigerant flow transmitter and the refrigerant flow controller, and is connected to the refrigerant flow setting unit and the main control module respectively; The refrigerant flow setting unit is used to set the refrigerant target flow and send the refrigerant target flow to the refrigerant flow controller; The first adder is used to acquire the actual refrigerant flow rate and the refrigerant control signal, generate a refrigerant adjustment signal based on the actual refrigerant flow rate and the refrigerant control signal, and send the refrigerant adjustment signal to the refrigerant flow controller; The refrigerant flow controller is also used to control the opening of the refrigerant flow regulating valve according to the refrigerant regulation signal, so as to regulate the refrigerant flow entering the main heat exchanger until the actual refrigerant flow reaches the refrigerant target flow.

4. The system according to claim 1, characterized in that, The system also includes multiple sub-vessel body temperature transmitters; wherein each sub-vessel body temperature transmitter is located at the corresponding sub-heat exchanger, and all of the multiple sub-vessel body temperature transmitters are connected to the main control module; The sub-vessel body temperature transmitter is used to detect the sub-vessel body temperature of the corresponding sub-heat exchanger and send the sub-vessel body temperature to the main control module.

5. The system according to claim 4, characterized in that, The total chilled water flow control module includes: a total chilled water inlet temperature transmitter, a total chilled water outlet temperature transmitter, a total chilled water inlet pressure transmitter, and a total chilled water outlet pressure transmitter; wherein, the total chilled water inlet temperature transmitter, the total chilled water outlet temperature transmitter, the total chilled water inlet pressure transmitter, and the total chilled water outlet pressure transmitter are all connected to the main control module; The total chilled water inlet temperature transmitter is used to detect the total chilled water inlet temperature at which the total chilled water flows into the main heat exchanger; The total chilled water outlet temperature transmitter is used to detect the total chilled water outlet temperature at which the total chilled water flows out of the main heat exchanger; The total chilled water inlet pressure transmitter is used to detect the total chilled water inlet pressure into the main heat exchanger; The total chilled water outlet pressure transmitter is used to detect the total chilled water outlet pressure when the total chilled water flows out of the main heat exchanger.

6. The system according to claim 4, characterized in that, Each of the sub-loop chilled water flow control modules includes: a sub-chilled water flow meter, a sub-chilled water flow transmitter, a sub-chilled water flow regulating valve, a sub-chilled water flow controller, a sub-chilled water inlet temperature transmitter, a sub-chilled water outlet temperature transmitter, a sub-chilled water inlet pressure transmitter, and a sub-chilled water outlet pressure transmitter; wherein, the sub-chilled water flow transmitter, the sub-chilled water inlet temperature transmitter, the sub-chilled water outlet temperature transmitter, the sub-chilled water inlet pressure transmitter, and the sub-chilled water outlet pressure transmitter are all connected to the main control module, the sub-chilled water flow transmitter is connected to the sub-chilled water flow meter, and the sub-chilled water flow controller is connected to the sub-chilled water flow regulating valve; The sub-chilled water flow transmitter is used to detect the actual flow rate of the sub-chilled water flowing into the sub-heat exchanger in real time via the sub-chilled water flow meter. The sub-chilled water inlet temperature transmitter is used to detect the sub-chilled water inlet temperature at which the sub-chilled water flows into the sub-heat exchanger; The sub-chilled water outlet temperature transmitter is used to detect the sub-chilled water outlet temperature at which the sub-chilled water flows out of the sub-heat exchanger. The sub-chilled water inlet pressure transmitter is used to detect the sub-chilled water inlet pressure into the sub-heat exchanger; The sub-chilled water outlet pressure transmitter is used to detect the sub-chilled water outlet pressure of the sub-chilled water flowing out of the sub-heat exchanger; The sub-chilled water flow controller is used to control the opening of the sub-chilled water flow regulating valve according to the sub-chilled water control signal, so as to regulate the sub-chilled water flow rate entering the sub-heat exchanger.

7. The system according to claim 6, characterized in that, The sub-loop chilled water flow control module further includes: a sub-chilled water temperature setting unit, a sub-chilled water temperature controller, a fifth adder, a sixth adder, and a seventh adder; wherein, the sub-chilled water temperature setting unit is connected to one end of the sub-chilled water temperature controller via the fifth adder, the other end of the sub-chilled water temperature controller is connected to the sub-chilled water flow controller via the sixth adder, the sixth adder is connected to the main control module via the seventh adder, the seventh adder is also connected to the sub-chilled water flow transmitter, and the fifth adder is also connected to the corresponding sub-vessel body temperature transmitter; The sub-chilled water temperature setting unit is used to set the sub-chilled water target temperature and send the sub-chilled water target temperature to the fifth adder; The fifth adder is used to generate a sub-chilled water temperature variable based on the sub-chilled water target temperature and the sub-vessel body temperature sent by the sub-vessel body temperature transmitter, and to send the sub-chilled water temperature variable to the sub-chilled water temperature controller. The sub-chilled water temperature controller is used to generate a sub-chilled water temperature control signal based on the sub-chilled water temperature variable, and send the sub-chilled water temperature control signal to the sixth adder; The sixth adder is used to acquire the sub-chilled water temperature control signal and the sub-chilled water control signal, generate a sub-chilled water adjustment signal based on the sub-chilled water temperature control signal and the sub-chilled water control signal, and send the sub-chilled water adjustment signal to the sub-chilled water flow controller; The sub-chilled water flow controller is further configured to control the opening of the sub-chilled water flow regulating valve according to the sub-chilled water regulation signal, so as to regulate the sub-chilled water flow entering the sub-heat exchanger until the sub-chilled water inlet temperature reaches the sub-chilled water target temperature.

8. A method for controlling chilled water in an air conditioner, characterized in that, The method is applied to the air conditioning chilled water control system according to any one of claims 1-7; the method includes: The system acquires refrigerant information sent by the refrigerant flow control module and generates a refrigerant control signal based on the refrigerant information; and sends the refrigerant control signal to the refrigerant flow control module so that the refrigerant flow control module adjusts the refrigerant flow into the main heat exchanger according to the refrigerant control signal; wherein the refrigerant information includes: actual refrigerant flow rate, refrigerant inlet temperature, refrigerant outlet temperature, refrigerant inlet pressure, and refrigerant outlet pressure; The system acquires the main vessel temperature of the main heat exchanger and the total chilled water information sent by the total chilled water flow control module, and generates a total chilled water control signal based on the main vessel temperature and the total chilled water information; and sends the total chilled water control signal to the total chilled water flow control module so that the total chilled water flow control module adjusts the total chilled water flow into the main heat exchanger according to the total chilled water control signal; wherein, the total chilled water information includes: total chilled water inlet temperature, total chilled water outlet temperature, actual total chilled water flow rate, total chilled water inlet pressure, and total chilled water outlet pressure; The system acquires the sub-chilled water information and the corresponding sub-bottle temperature of the sub-heat exchanger sent by each sub-loop chilled water flow control module, and generates a sub-chilled water control signal based on the sub-chilled water information and the sub-bottle temperature; and sends the sub-chilled water control signal to the sub-loop chilled water flow control module so that the sub-loop chilled water flow control module adjusts the sub-chilled water flow rate entering the sub-heat exchanger according to the sub-chilled water control signal; wherein, the sub-chilled water information includes: sub-chilled water inlet temperature, sub-chilled water outlet temperature, sub-chilled water actual flow rate, sub-chilled water inlet pressure, and sub-chilled water outlet pressure.

9. A central air conditioning system, characterized in that, The central air conditioning system includes an outdoor unit and an air conditioning chilled water control system as described in any one of claims 1-7; wherein the outdoor unit is used to transmit refrigerant to the air conditioning chilled water control system.

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