An air conditioning chilled water system cooling capacity-flow integrated control method, device, equipment and medium

Abstract

The application provides a chilled water system cooling capacity-flow integrated control method, device, equipment and medium, the control method comprises: obtaining the real-time chilled water supply temperature and real-time chilled water return temperature of each user in the chilled water system; wherein the chilled water system comprises a cooling capacity-flow integrated control valve arranged at the water inlet end of each user; based on the real-time chilled water supply temperature and real-time chilled water return temperature of each user, the real-time supply-return water temperature difference of each user is obtained; based on the real-time supply-return water temperature difference of each user, the opening degree of the cooling capacity-flow integrated control valve is controlled. The control method can adjust the opening degree of the cooling capacity-flow integrated control valve according to the real-time supply-return water temperature difference of each user, so that the chilled water in the chilled water system is evenly distributed among each user, the cooling capacity is evenly distributed, and the chilled water demand of each user is ensured to be met in real time.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heating, ventilation and air conditioning, and relates to a control method of an air conditioning chilled water system, in particular to a control method, device, equipment and medium of an air conditioning chilled water system. BACKGROUND

[0002] The current control method of the air conditioning chilled water system mostly adopts a single control method, such as a single pressure difference control method and a single temperature difference control method. The single pressure difference control is divided into constant pressure difference control and variable pressure difference control. The variable pressure difference control needs to set a pressure sensor at each terminal to compare the pressure difference of the most unfavorable terminal at any time and adjust the water pump speed according to the value, so the investment is relatively high, the control logic is complicated and prone to error, and the implementation is difficult. In the actual application process of the constant pressure difference control, according to the setting position of the pressure difference sensor, it is divided into terminal main pipe constant pressure difference control and initial main pipe constant pressure difference control. However, the two kinds of variable pressure difference control methods cannot finely control the flow supply and demand of the system, and both have a certain hysteresis, that is, the flow changes of other users cannot be quickly reflected on the pressure difference, which leads to that the system cannot timely change the flow delivery, the control precision is not enough, and causes power waste. In addition, this single pressure difference control method needs the user end to be equipped with a precise full-automatic air conditioner, and the flow demand changes of the user end are reflected on the changes of the pressure difference, and then the flow of the entire air conditioning chilled water system is controlled. The single temperature difference control method adjusts the speed of the chilled water pump according to the change of the load in the air conditioning chilled water system to match the system flow with the load. However, since the single temperature difference control method cannot detect the difference of the load changes of different floors, it may cause the phenomenon that the air conditioner fails due to insufficient chilled water pressure of some floors. In addition, the single temperature difference control method can only reflect the temperature change after the chilled water passes through a cycle, so the timeliness of the control is poor. Although this method can stabilize the total water supply or return water temperature of the system to a certain extent, it cannot accurately allocate the chilled water required by each user according to the load change and provide appropriate water pressure.

[0003] In actual application, whether it is the single pressure difference control method or the single temperature difference control method, it will lead to uneven distribution of the cold energy and flow of each user in the air conditioning chilled water system, which is easy to cause the phenomenon of underflow or overflow of some users, leads to deviation of the return water temperature, and causes insufficient or waste of energy consumption; in addition, both of them adjust the frequency of the chilled water pump through unified control, which will have a certain time interval, the flow supply has hysteresis, which leads to that the system cannot timely change the flow delivery, the control precision is not enough, and causes power waste. SUMMARY

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present application is to provide a chilled water system cooling capacity-flow integrated control method, device, equipment and medium, which is used to solve the problem that the required chilled water cannot be accurately and evenly distributed to each user terminal in the chilled water system control method of the prior art, and the problem of energy waste or inability to supply in time due to the control lag and insufficient control accuracy.

[0005] To achieve the above-mentioned purpose and other related purposes, the present application is implemented by including the following technical solutions.

[0006] In a first aspect of the present application, a chilled water system control method is provided, comprising: obtaining the real-time chilled water supply temperature and the real-time chilled water return temperature of each user in the chilled water system; wherein the chilled water system comprises a chilled water pump and a chilled water cooling capacity-flow integrated control valve arranged at the water inlet end of each user; based on the real-time chilled water supply temperature and the real-time chilled water return temperature of each user, obtaining the real-time supply-return water temperature difference of each user; and based on the real-time supply-return water temperature difference of each user, controlling the opening degree of the chilled water cooling capacity-flow integrated control valve.

[0007] In some embodiments of the first aspect of the present application, the control method further comprises: obtaining the average chilled water cooling capacity sum of all users in the unit mapping time period; wherein the chilled water system comprises a chilled water pump; taking the sum of the average chilled water cooling capacity sum in the unit mapping time period and the set residual cooling capacity as the supply demand cooling capacity in the next unit mapping time period; and based on the corresponding supply demand cooling capacity, adjusting the working frequency of the chilled water pump in the next unit mapping time period.

[0008] In some embodiments of the first aspect of the present application, the target supply-return water temperature difference of each user terminal in the chilled water system is set to 5-6℃.

[0009] In some embodiments of the first aspect of the present application, the method of obtaining the average chilled water cooling capacity sum of all users in the unit mapping time period comprises: obtaining the real-time chilled water flow of each user in the chilled water system; based on the real-time supply-return water temperature difference and the real-time chilled water flow of each user, obtaining the real-time chilled water cooling capacity of each user; based on the real-time chilled water cooling capacity data string of each user in the unit mapping time period, obtaining the average chilled water cooling capacity in the unit mapping time period; and based on the average chilled water cooling capacity of each user in the unit mapping time period, obtaining the average chilled water cooling capacity sum of all users in the unit mapping time period.

[0010] In some embodiments of the first aspect of the present application, the residual cooling capacity is 5%-10% of the average chilled water cooling capacity sum.

[0011] In some embodiments of the first aspect of the present application, the unit mapping time period is 50-180 s. In some embodiments of the first aspect of the present application, when the real-time supply and return water temperature difference of the user exceeds the target supply and return water temperature difference, the opening degree of the cooling capacity-flow integrated control valve is controlled to supply the required chilled water cooling capacity, so that the real-time supply and return water temperature difference is maintained within the target supply and return water temperature difference range.

[0012] In some embodiments of the first aspect of the present application, the user is a floor, a communication room unit, or a communication equipment unit.

[0013] In some embodiments of the first aspect of the present application, the air conditioning chilled water system includes one or more users, and any user and any other user are connected in parallel based on the chilled water pipeline.

[0014] In some embodiments of the first aspect of the present application, the air conditioning chilled water system is provided with a thermometer at each user supply water end and return water end to monitor the supply water temperature and return water temperature in real time.

[0015] In some embodiments of the first aspect of the present application, the air conditioning chilled water system includes at least two parallel-connected water chillers.

[0016] In some embodiments of the first aspect of the present application, when the number of operating water chillers in the air conditioning chilled water system is greater than or equal to 1, and the real-time chilled water cooling capacity of the user increases to more than 85% of the rated cooling capacity of the water chiller currently operating, and remains unchanged within a unit time, the number of operating water chillers is controlled to be increased to ensure that the real-time chilled water cooling capacity is met.

[0017] In some embodiments of the first aspect of the present application, when the number of operating water chillers in the air conditioning chilled water system is greater than 1, and the real-time chilled water cooling capacity of the user is less than 40% of the rated cooling capacity of the water chiller currently operating, and remains unchanged within a unit time, the number of operating water chillers is controlled to be reduced.

[0018] In some embodiments of the first aspect of the present application, the air conditioning chilled water system further includes a bypass pipeline, which is connected in parallel with the chilled water pipeline acting on any user; when only one water chiller is operating and the real-time chilled water cooling capacity of each user within a unit time is still less than 35% of the rated cooling capacity of the single water chiller, the bypass pipeline is controlled to be connected to ensure the required cooling capacity for safe operation of the system.

[0019] In some embodiments of the first aspect of the present application, the required cooling capacity for safe operation of the system is the difference between 35% of the rated cooling capacity of the water chiller and the real-time chilled water cooling capacity of the user.

[0020] In some embodiments of the first aspect of the present application, the unit time is 5-10 minutes.

[0021] In some embodiments of the first aspect of the present application, the chilled water system comprises at least two chilled water pumps connected in parallel; the operation frequency and / or the number of the chilled water pumps in the next unit mapping time period are controlled according to the supply demand cooling capacity to ensure that the supply demand cooling capacity is met; when the supply demand cooling capacity is small and the operation frequency of one water pump can meet the requirement, the water pump frequency is controlled according to the supply demand cooling capacity; when the supply demand cooling capacity is large and the highest operation frequency of one water pump cannot meet the requirement, the number of the water pumps is controlled to ensure that the supply demand cooling capacity is met.

[0022] In the second aspect of the present application, a control device for a chilled water system of an air conditioner is provided, which comprises at least: a real-time chilled water supply temperature acquisition module for acquiring the real-time chilled water supply temperature of each user in the chilled water system of the air conditioner; a real-time chilled water return temperature acquisition module for acquiring the real-time chilled water return temperature of each user in the chilled water system of the air conditioner; a real-time supply-return water temperature difference acquisition module for acquiring the real-time supply-return water temperature difference of each user in the chilled water system of the air conditioner; and a cooling capacity-flow integrated control valve control module for controlling the opening degree of the cooling capacity-flow integrated control valve based on the real-time supply-return water temperature difference of each user.

[0023] In some embodiments of the second aspect of the present application, the control device further comprises: an average chilled water cooling capacity total acquisition module for acquiring the average chilled water cooling capacity total of all users in a unit mapping time period based on the average chilled water cooling capacity of each user in the unit mapping time period; a supply demand cooling capacity acquisition module for taking the sum of the average chilled water cooling capacity total in the unit mapping time period and a set margin cooling capacity as the supply demand cooling capacity in the next unit mapping time period; and a chilled water pump working frequency control module for adjusting the working frequency of the chilled water pump based on the corresponding supply demand cooling capacity in the next unit mapping time period.

[0024] In some embodiments of the second aspect of the present application, the control device further comprises: a real-time chilled water flow acquisition module for acquiring the real-time chilled water flow of each user in the chilled water system of the air conditioner; a real-time chilled water cooling capacity acquisition module for acquiring the real-time chilled water cooling capacity of each user in the chilled water system of the air conditioner based on the real-time supply-return water temperature difference and the real-time chilled water flow of each user; and an average chilled water cooling capacity acquisition module for acquiring the average chilled water cooling capacity in a unit mapping time period based on the real-time chilled water cooling capacity data string of each user in the unit mapping time period.

[0025] In some embodiments of the second aspect of the present application, the control device further comprises a surplus chilled water capacity obtaining module, configured to obtain a surplus chilled water capacity in the next unit mapping time period based on the average chilled water capacity sum of the unit mapping time.

[0026] In some embodiments of the second aspect of the present application, the control device further comprises a chiller working platform number control module, configured to control the number of running chiller working platforms according to the real-time chilled water capacity sum to ensure that the real-time chilled water capacity sum is met.

[0027] In some embodiments of the second aspect of the present application, the control device further comprises a chilled water pump working platform number control module, configured to control the number of running chilled water pump working platforms according to the supply demand capacity in the next mapping time period to ensure that the supply demand capacity is met.

[0028] In some embodiments of the second aspect of the present application, the control device further comprises a bypass pipeline control module, configured to control the bypass pipeline to be connected when only one chiller is running and the average chilled water capacity sum is still less than 35% of the rated chiller refrigeration capacity to ensure the chilled water capacity required for safe operation of the system.

[0029] In some embodiments of the second aspect of the present application, the chilled water capacity required for safe operation of the system is the difference between 35% of the rated chiller refrigeration capacity and the real-time chilled water capacity sum.

[0030] The third aspect of the present application provides a computer readable storage medium, which stores a computer program, and the computer program is used to make the processor execute the control method of the present application.

[0031] The fourth aspect of the present application provides an electronic device, which comprises a processor, a memory and a computer program; the memory is in communication connection with the processor, and the memory stores the computer program; the processor executes the computer program to realize the control method of the present application.

[0032] As described above, the control method of the present application can adjust the opening degree of the capacity-flow integrated control valve according to the real-time supply-return water temperature difference of each user, so that the chilled water in the chilled water system of the air conditioner is evenly distributed among each user, the chilled water capacity is evenly distributed, and the chilled water demand of each user is met in real time. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The flowchart shows the control method of the chilled water system of the air conditioner in an embodiment of the present application;

[0034] Figure 2A flowchart showing the control method of the chilled water pump of the chilled water system of the air conditioner in another embodiment of the present application;

[0035] Figure 3 A flowchart showing the control method of the chilled water system of the air conditioner in another embodiment of the present application;

[0036] Figure 4 A schematic diagram showing the chilled water control of each unit mapping time period in an embodiment of the present application;

[0037] Figure 5 A schematic diagram showing the application scenario of the control method of the chilled water system of the air conditioner in an embodiment of the present application;

[0038] Figure 6 A schematic diagram showing the application scenario of the control method of the chilled water system of the air conditioner in another embodiment of the present application;

[0039] Figure 7 A schematic diagram showing the application scenario of the control method of the chilled water system of the air conditioner in another embodiment of the present application;

[0040] Figure 8 A flowchart showing the determination and execution of the number of operating chillers in an embodiment of the control method of the chilled water system of the air conditioner;

[0041] Figure 9 A schematic diagram showing the structure of the energy-saving control device of the chilled water system of the air conditioner in an embodiment of the present application;

[0042] Figure 10 A schematic diagram showing the structure of the energy-saving control device of the chilled water system of the air conditioner in another embodiment of the present application;

[0043] Figure 11 A schematic diagram showing the structure of the energy-saving control device of the chilled water system of the air conditioner in another embodiment of the present application;

[0044] Figure 12 A schematic diagram showing the structure of the electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0045] Following make the specific concrete example explain the embodiment of the present application, the person skilled in the art can be easily understood from the disclosure of the present application other advantages and efficacy.The present application can also be implemented or applied by another different specific embodiment, the details in the present application can be based on different views and applications, in the absence of deviating from the spirit of the present application, various modifications or changes.The need to explain, in the following examples and the features in the examples can be combined with each other without conflict.

[0046] Need to explain, the drawings provided in the following examples only illustrate the basic concept of the present application in a schematic way, and the drawings only show the components related to the present application, but not drawn according to the number, shape and size of the components when actually implemented, the actual implementation of each component type, quantity and proportion can be a kind of arbitrary change, and its component layout type may be more complex.

[0047] Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including" when used herein, specify the presence of stated features, operations, elements, components, items, categories, and / or groups but do not preclude the presence or addition of one or more other features, operations, elements, components, items, categories, and / or groups thereof. As used herein, the terms "or" and "and / or" are construed to be inclusive, or mean one or any combination of the items.

[0048] For the purpose of the present application, technical solutions and advantages are more clear and obvious, through the following examples and combining with the drawings, the further detailed description of the technical solutions in the embodiment of the present application.It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the invention.

[0049] For the technical problems existing in the prior art, the present application first provides a control method of air conditioning chilled water system, by acquiring the real-time chilled water supply temperature and real-time chilled water return temperature of each user in the air conditioning chilled water system;Among them, the air conditioning chilled water system contains the cold quantity-flow integrated control valve arranged at the inlet end of each user;Based on the real-time chilled water supply temperature and real-time chilled water return temperature of each user, the real-time supply and return water temperature difference of each user is obtained;Based on the real-time supply and return water temperature difference of each user, the opening degree of the cold quantity-flow integrated control valve is controlled.

[0050] The cold quantity-flow integrated control regulating valve is applied to the air conditioning chilled water system for the first time, the opening degree of the cold quantity-flow integrated control regulating valve is adjusted in real time according to the real-time supply and return water temperature difference of each user end, the chilled water in the air conditioning chilled water system is evenly distributed among the users, and the cold quantity distribution is balanced; compared with the flow control in the prior art, the chilled water supply of the user end is more accurate by controlling the cold quantity in the application, and the real-time adjustment according to the temperature difference does not cause underflow or overflow, the real-time reasonable and balanced distribution of the chilled water in the entire air conditioning chilled water system is achieved, and the energy consumption is more saved.

[0051] In order to facilitate understanding of the embodiments of the application, first, the control method of the air conditioning chilled water system in the embodiments of the application is described in combination with the accompanying drawings. Figure 1 The control method of the air conditioning chilled water system in the embodiments of the application is described in detail. Figure 1 The flow diagram of the control method of the air conditioning chilled water system in the embodiments of the application is shown, which includes the following steps:

[0052] S11, the real-time chilled water supply temperature and the real-time chilled water return temperature of each user in the air conditioning chilled water system are obtained.

[0053] The real-time chilled water supply temperature of each user is the chilled water temperature on the inlet pipeline before flowing through each user after being refrigerated by the chiller, and the real-time chilled water return temperature of each user is the chilled water temperature on the outlet pipeline after flowing through each user.

[0054] S12, the real-time supply and return water temperature difference of each user is obtained based on the real-time chilled water supply temperature and the real-time chilled water return temperature of each user.

[0055] The supply and return water temperature difference is the difference between the chilled water temperature after flowing through each user and the chilled water temperature after being refrigerated by the chiller.

[0056] S13, the opening degree of the cold quantity-flow integrated control regulating valve is controlled based on the real-time supply and return water temperature difference of each user.

[0057] The control method of the air conditioning chilled water system in the application ensures the on-demand distribution of chilled water among users in the entire air conditioning chilled water system, can effectively reduce the delay and non-precision caused by the single pressure difference control or temperature control in the prior art, in this case, since the cold quantity-flow integrated control regulating valve changes in real time according to the real-time supply and return water temperature difference of each user, the chilled water demand of each user can be met in real time, therefore, the water pump does not need to change in real time, so that the air conditioning chilled water system runs more stably.

[0058] In some optional embodiments, the control method further comprises: obtaining the total average chilled water cooling capacity of all users in the unit mapping time period, and taking the sum of the total average chilled water cooling capacity in the unit mapping time period and the set excess cooling capacity as the supply-demand cooling capacity in the next unit mapping time period, so as to ensure that the supply-demand cooling capacity in the chilled water system of the air conditioner changes in intervals of the unit mapping time period.

[0059] Figure 2 A flowchart of a control method for a chilled water pump in a chilled water system of an air conditioner according to an embodiment of the present application is shown, which comprises the following steps:

[0060] S21, obtaining the total average chilled water cooling capacity of all users in the unit mapping time period, and taking the sum of the total average chilled water cooling capacity in the unit mapping time period and the set excess cooling capacity as the supply-demand cooling capacity in the next unit mapping time period.

[0061] S22, adjusting the working frequency of the chilled water pump based on the corresponding supply-demand cooling capacity in the next unit mapping time period.

[0062] In some optional embodiments, the obtaining of the total average chilled water cooling capacity of all users in the unit mapping time period comprises: obtaining the real-time chilled water flow of each user in the chilled water system of the air conditioner; obtaining the real-time chilled water cooling capacity of each user based on the real-time chilled water supply-return temperature difference and the real-time chilled water flow of each user; obtaining the average chilled water cooling capacity in the unit mapping time period based on the real-time chilled water cooling capacity data string of each user in the unit mapping time period; and obtaining the total average chilled water cooling capacity of all users in the unit mapping time period based on the average chilled water cooling capacity of each user in the unit mapping time period.

[0063] Figure 3 A flowchart of the obtaining of the total average chilled water cooling capacity of all users in the unit mapping time period in a control method for a chilled water system of an air conditioner according to an embodiment of the present application is shown, which comprises the following steps:

[0064] S31, obtaining the real-time chilled water supply temperature, the real-time chilled water return temperature and the real-time chilled water flow of each user in the chilled water system of the air conditioner.

[0065] The real-time chilled water supply temperature of each user is the chilled water temperature on the inlet pipeline before the chilled water flows through each user after being refrigerated by the chiller unit, the real-time chilled water return temperature of each user is the chilled water temperature on the outlet pipeline after the chilled water flows through each user, and the real-time chilled water flow of each user is the real-time chilled water flow through each user.

[0066] S32, obtaining the real-time chilled water supply-return temperature difference of each user based on the real-time chilled water supply temperature and the real-time chilled water return temperature of each user.

[0067] The supply and return water temperature difference is the difference between the chilled water temperature after flowing through each user and the chilled water temperature after being refrigerated by the water chiller.

[0068] S33, based on the real-time supply and return water temperature difference and the real-time chilled water flow rate of each user, the real-time chilled water cooling capacity of each user is obtained.

[0069] The cooling capacity in the present application is the actual chilled water consumption of the user end, i.e. the chilled water energy consumption.

[0070] Specifically, based on the cooling capacity-flow rate calculation formula P = Q x c x ΔT, the real-time chilled water cooling capacity of each user is calculated, wherein P is the chilled water cooling capacity (kW), Q is the flow rate of chilled water (m 3 / h), c is the specific heat capacity of water (kJ / kg·℃), and ΔT is the supply and return water temperature difference (℃). Since the monitored chilled water flow rate is in units of m 3 / h, it is necessary to convert the chilled water flow rate from m 3 / h to L / s when actually operating using the above formula. Since 1000L = 1m 3 , 1h = 3600s, therefore m 3 / h needs to be converted to L / s to obtain the final cooling capacity P value of the formula P = Q x c x ΔT / 3.6.

[0071] S34, based on the real-time chilled water cooling capacity data string of each user in a unit mapping time period, the average chilled water cooling capacity in the unit mapping time period is obtained.

[0072] Specifically, the average value of the plurality of real-time chilled water cooling capacities of each user in the unit mapping time period is obtained, i.e. the average chilled water cooling capacity of each user in the unit mapping time period is obtained.

[0073] S35, based on the average chilled water cooling capacity of each user in a unit mapping time period, the average chilled water cooling capacity sum of all users in the unit mapping time period is obtained.

[0074] Specifically, the average chilled water cooling capacities of each user in the unit mapping time period are summed, i.e. the average chilled water cooling capacity sum of all users in the unit mapping time period is obtained.

[0075] The control method of the air-conditioning chilled water system provided in this embodiment obtains the chilled water supply temperature, real-time chilled water return temperature and chilled water flow of each user in the air-conditioning chilled water system in real time, and obtains the real-time supply and return water temperature difference of each user based on the real-time chilled water supply temperature and real-time chilled water return temperature of each user; obtains the real-time chilled water cooling capacity of each user based on the real-time supply and return water temperature difference and real-time chilled water flow of each user, and obtains the average chilled water cooling capacity in the unit mapping time period based on the real-time chilled water cooling capacity data string of each user in the unit mapping time period; obtains the sum of the average chilled water cooling capacity of all users in the unit mapping time period based on the average chilled water cooling capacity of each user in the unit mapping time period, and uses the sum of the average chilled water cooling capacity in the unit mapping time period and the set surplus cooling capacity as the supply demand cooling capacity in the next unit mapping time period, thereby adjusting the operating frequency of the chilled water pump according to the supply demand cooling capacity; compared with the existing technology, the control method in this application controls the chilled water pump frequency according to the chilled water cooling capacity demand of each user, which can greatly reduce the energy consumption of the chilled water pump and reduce energy waste.

[0076] It should be noted that the water pump frequency can be controlled by cooling capacity control as described in this application, or by flow control.

[0077] In some optional embodiments, by monitoring the real-time chilled water flow and real-time chilled water return temperature of the user, and based on the real-time chilled water return temperature of each user, the real-time supply and return water temperature difference of each user is obtained, and based on the real-time supply and return water temperature difference of each user, the opening and closing degree of the cooling capacity-flow integrated control regulating valve is controlled to meet the chilled water flow requirements of each user, thereby realizing on-demand distribution of chilled water flow in the entire air-conditioning chilled water system and achieving supply and demand balance.

[0078] In a specific embodiment, the opening and closing degree of the cooling capacity-flow integrated control regulating valve changes according to the real-time supply and return water temperature difference of each user. When the temperature difference is large, the opening and closing degree of the cooling capacity-flow integrated control regulating valve becomes larger, and when the temperature difference is small, the opening and closing degree of the cooling capacity-flow integrated control regulating valve becomes smaller.

[0079] like Figure 4 As shown in FIG, it is a schematic diagram of chilled water cooling capacity control for each unit mapping time period in this embodiment. Figure 4 The middle horizontal axis is the time axis, with the unit mapping time period being t. The sum of the average chilled water cooling capacity and the surplus cooling capacity of all users in the first unit mapping time period (Pt+△P) is used as the supply and demand cooling capacity for the next unit mapping time period. The sum of the average chilled water cooling capacity and the surplus cooling capacity of all users in the next time period (P2t+△P) is used as the supply and demand cooling capacity for the next time period, and so on.

[0080] In a specific embodiment, the unit mapping time period is any one of 50-180 seconds, such as 50-80 seconds, 80-100 seconds, 100-150 seconds, or 150-180 seconds. If the unit mapping time period is too long (e.g., 10 minutes), the supply and demand flow rate changes too slowly, and the user's needs cannot be met in a timely manner. If the unit mapping time period is too short (e.g., 3 seconds or 10 seconds), the supply and demand flow rate changes too quickly, the entire air conditioning chilled water system calculation and water flow rate change is too frequent, the system stability index is reduced, and the energy consumption is large. It should be noted that the unit mapping time period can also be artificially set and adjusted. The unit mapping time period can be determined based on the change in the average chilled water cooling capacity sum of all users, such as the change speed and change amplitude of the average chilled water cooling capacity sum of all users at a similar time. For example, if the change speed is fast and the change amplitude is large, a shorter or smaller unit mapping time period can be set.

[0081] In a more specific embodiment, the unit mapping time period is specifically 60 seconds. The sum of the average chilled water cooling capacity sum of all users and the excess cooling capacity obtained in the previous 60 seconds is used as the actual supply and demand flow rate in the next 60 seconds.

[0082] In some optional embodiments, the excess cooling capacity is 5%-10% of the average chilled water cooling capacity sum, and the excess cooling capacity is fixed in the unit mapping time period. The value of the excess cooling capacity in the next unit mapping time period is 5%-10% of the average chilled water cooling capacity sum in the previous unit mapping time period, such as 5%, 6%, 7%, 8%, 9%, or 10%. If the value of the excess cooling capacity is too small (e.g., 1%), when the chilled water cooling capacity demand at the user end increases, the supplied chilled water cooling capacity cannot meet the user's needs. If the value of the excess cooling capacity is too small (e.g., 15%), the total supplied chilled water cooling capacity greatly exceeds the chilled water cooling capacity demand at the user end, resulting in waste of cooling capacity.

[0083] In some optional embodiments, a target supply and return water temperature difference is set for each user end in the air conditioning chilled water system. When the real-time supply and return water temperature difference exceeds the range of the target supply and return water temperature difference, the opening degree of the cooling capacity-flow integrated control valve is controlled to supply the required chilled water flow rate, and the real-time supply and return water temperature difference is maintained within the range of the target supply and return water temperature difference.

[0084] In a specific embodiment, the target supply and return water temperature difference is 5-6°C. If the set range of the target supply and return water temperature difference is too small (e.g., 5-5.2°C), the opening degree of the cooling capacity-flow integrated control valve changes too quickly, which is not conducive to stable operation of the system. If the set range of the target supply and return water temperature difference is too large (e.g., 5-8°C), the opening degree of the cooling capacity-flow integrated control valve changes too slowly, and the chilled water flow rate demand at the user end cannot be met in a timely manner.

[0085] In a more specific embodiment, when the real-time supply-return water temperature difference of the user end is less than 5℃, the opening degree of the cooling capacity-flow integrated control regulating valve is controlled to be less than the current opening degree to control the chilled water flow through the user to decrease, so that the real-time supply-return water temperature difference increases to the target supply-return water temperature difference range.

[0086] In a more specific embodiment, when the real-time supply-return water temperature difference of the user end is greater than 6℃, the opening degree of the cooling capacity-flow integrated control regulating valve is controlled to be greater than the current opening degree to control the chilled water flow through the user to increase, so that the real-time supply-return water temperature difference decreases to the target supply-return water temperature difference range.

[0087] Referring to Figure 5 , which shows an application scenario schematic diagram of the control method of the air conditioning chilled water system in an embodiment; the air conditioning chilled water system includes users, regulating valves, thermometers, chilled water pumps, water chillers, bypass valves, and a control center; the regulating valve is a cooling capacity-flow integrated control regulating valve and is arranged on the chilled water pipeline of each user to monitor the real-time chilled water flow of each user and control the real-time chilled water flow through each user by controlling the opening degree of the regulating valve; the water chiller is connected with the chilled water pump to perform refrigeration processing on the water pumped by the chilled water pump; the bypass valve is arranged on the bypass pipeline of the air conditioning chilled water system; and the control center serves as a monitoring platform and is used to collect the real-time chilled water return water temperature and the real-time chilled water flow of each user to adjust the working frequency of the chilled water pump based on the supply demand cooling capacity.

[0088] In some optional embodiments, the air conditioning chilled water system includes one or more users, and any user and any other user are arranged in parallel based on the chilled water pipeline.

[0089] In a specific embodiment, the user is a floor, a communication machine room unit, or a communication device unit.

[0090] If the user is a floor, each floor user can further include one or more rooms.

[0091] In a more specific embodiment, the cooling capacity-flow integrated control regulating valve can be arranged on the water inlet pipeline of the floor or on the water inlet pipeline of each room in the floor to achieve precise control of each room.

[0092] In another more specific embodiment, if Figure 6As shown, a room is taken as an example for a user, which contains a plurality of working hosts 603, an air flow sealed channel 604 between every two rows of hosts, a plurality of air conditioners 605, an inlet water pipeline 602, an outlet water pipeline 601 and a cold quantity-flow integrated control valve 606. Due to heat dissipation of the hosts, hot air is formed and enters the air flow sealed channel 604, and then is sucked by the air conditioner and cooled by heat exchange of the refrigerated water pipeline at the air conditioner to form cold air and is sent out again. Thus, the air conditioning system forms air circulation, and the refrigerated water in the inlet water pipeline 602 is heated after heat exchange, flows into the outlet water pipeline 601 and is cooled by the chiller unit again to flow into the water supply pipeline. Thus, the air conditioning refrigerated water system forms water circulation, and the cold quantity-flow integrated control valve 606 adjusts the opening degree in real time according to the supply and return water temperature difference to accurately meet the refrigerated water demand of the user end. The hot air in the air circulation is cooled to cold air by the water circulation, and the refrigerated water in the water circulation is further cooled by the chiller unit after the temperature is increased, and the air circulation and the water circulation interact to achieve dynamic balance adjustment effect.

[0093] In some optional embodiments, further taking the water circulation and air circulation in a single room as an example, Figure 7 In some optional embodiments, further taking the water circulation and air circulation in a single room as an example, the working hosts are heated due to data operation and the like, the air conditioner blows cold air to provide a low-temperature environment to cool the working hosts, the air blown out of the working hosts is hot air, the hot air blown out of each working host enters the sealed channel, the hot air in the sealed channel is sucked by the air conditioner, is cooled by heat exchange with the corresponding refrigerated water pipeline in the air conditioner and is sent out again as cold air, thereby forming air circulation between the working hosts and the air conditioner. In addition, the refrigerated water in the water supply pipeline corresponding to the air conditioner is heated to form hot water which enters the return water pipeline and is cooled by the chiller unit again to enter the water supply pipeline, thereby forming water circulation. In some optional embodiments, the air supply temperature of the air conditioner is constant.

[0094] In some optional embodiments, the constant air supply temperature is selected from any one of the determined values in 21-23℃. The constant air supply temperature is artificially set.

[0095] In some optional embodiments, the air conditioner of each user end is provided with an on-off valve, and the air conditioner can automatically adjust the opening degree of the on-off valve according to the supply and return air temperature to meet the refrigeration requirement.

[0096] In some optional embodiments, the air conditioner end does not contain a processor and a regulating valve, and cannot automatically control the refrigerated water flow.

[0097] In some alternative embodiments, the cold quantity-flow integrated control regulating valve is arranged at the water inlet end of each user of the air conditioning chilled water system to monitor the chilled water flow of each user in real time, and to adjust the chilled water flow through the user by adjusting the opening degree of the regulating valve to meet the real-time required chilled water cold quantity of the user.

[0098] In some alternative embodiments, the air conditioning chilled water system is provided with a thermometer at the chilled water return end of each user to monitor the return water temperature in real time.

[0099] In some alternative embodiments, the chiller is used to cool the water pumped by the chilled water pump, and the chilled water temperature after being cooled by the chiller is any one of 15-18℃.

[0100] In a specific embodiment, the chilled water temperature of the chiller is 16℃, and as shown in the figure, the temperature of the air conditioning chilled water cooled by the chiller is constant at 16℃, i.e., the supply water temperature of the air conditioning chilled water flowing through each user is 16℃. Figure 5

[0101] In another specific embodiment, since the chilled water temperature of the chiller is slowly increased when the chiller is started and stopped, a thermometer needs to be arranged on the supply water pipeline to monitor the supply water temperature in real time, and a thermometer needs to be arranged on the outlet pipeline of each user to monitor the chilled water return water temperature of each user in real time, so as to calculate the real-time supply-return water temperature difference of each user, and to adjust the opening degree of the cold quantity-flow integrated control regulating valve based on the real-time supply-return water temperature difference to ensure that the supply-return water temperature difference is within the set range.

[0102] In a specific embodiment, in the next unit mapping time period, when the working frequency of the chilled water pump is adjusted based on the corresponding supply demand cold quantity, the control center calculates the current or voltage signal of the water pump that meets the demand in the next unit mapping time period based on the corresponding supply demand cold quantity in the last unit mapping time period, and the chilled water pump works according to the corresponding working frequency after receiving the current or voltage signal to provide chilled water with the supply demand cold quantity into the air conditioning chilled water system.

[0103] For the cloud computing communication machine room or intelligent computing center scenario involved in the present application, since the working host of each user end changes in real time, the host temperature changes in real time, and the chilled water temperature after flowing through the user changes in real time, since the supply water temperature is constant, in order to maintain the supply-return water temperature difference within the set range, the control center controls the opening degree of the cold quantity-flow integrated control regulating valve to maintain the chilled water flow through the user within the set range of the supply-return water temperature difference. Figure 5 ​As shown, the control center acquires the real-time chilled water return temperature of each user monitored by the thermometer, and calculates the real-time supply-return water temperature difference of each user. When the real-time supply-return water temperature difference of each user exceeds the set target supply-return water temperature difference range, the control center controls the opening degree of the cooling-flow integrated control regulating valve to increase or decrease to supply the required chilled water flow of the user, so that the supply-return water temperature difference is maintained within the set range; based on the real-time supply-return water temperature difference and the real-time chilled water flow of each user, the real-time chilled water cooling capacity of each user is acquired, the average chilled water cooling capacity in the unit mapping time period is acquired based on the real-time chilled water cooling capacity data string of each user in the unit mapping time period, the average chilled water cooling capacity sum of all users in the unit mapping time period is acquired based on the average chilled water cooling capacity of each user in the unit mapping time period, and the average chilled water cooling capacity sum in the unit mapping time period and the set sum of excess cooling capacity are taken as the supply demand cooling capacity in the next unit mapping time period; the control center calculates the supply demand cooling capacity, and converts the cooling capacity signal into a current or voltage signal, which can directly correspond to the frequency value of the chilled water pump, so as to control and adjust the working frequency of the chilled water pump.

[0104] In some optional embodiments, when the number of operating chiller units in the air conditioning chilled water system is ≥1, and the real-time chilled water cooling capacity sum of the users increases to more than 85% of the rated cooling capacity of the chiller units of the current operating number, and remains unchanged per unit time, the control increases the operating number of the chiller units to ensure that the real-time chilled water cooling capacity sum is met.

[0105] In some optional embodiments, when the number of operating chiller units in the air conditioning chilled water system is ≥2, and the real-time chilled water cooling capacity sum is less than 40% of the rated cooling capacity of the operating chiller units, and remains unchanged per unit time, the control reduces the operating number of the chiller units.

[0106] Please refer to Figure 8 , which shows a flowchart of the execution of the chiller unit operating number judgment, including the following steps:

[0107] S810, acquiring the current real-time chilled water cooling capacity sum;

[0108] S820, calculating the N1 value by the formula: and calculating the N2 value by the formula:

[0109]

[0110] S830, comparing the N1 value and the N2 value with the current chiller unit operating number N value;

[0111] S840, when the N1 value > N value, judging whether the duration that the current N1 value is greater than the N value is greater than the unit time; ​

[0112] S841, if yes, then the running number of the chiller units is controlled as the current N1 value;

[0113] S842, if no, then the running number of the chiller units is kept unchanged;

[0114] S850, when N2 value < N value, it is judged whether the duration that the current N2 value is less than the N value is greater than the unit time;

[0115] S851, if yes, then the running number of the chiller units is controlled as the current N2 value;

[0116] S852, if no, then the running number of the chiller units is kept unchanged.

[0117] It should be noted that the N, N1 and N2 are integers, when a non-integer is encountered, the value is always taken as 1 plus, and the minimum value of the N, N1 and N2 is 1. For example, when the N is calculated as 2.1, the final value of the N is 3.

[0118] In some optional embodiments, the unit time is 5-10 min, for example, it can be 5 min, 6 min, 7 min, 8 min, 9 min or 10 min. When the unit time is too small (such as 1 min), it will lead to frequent adjustment of the chiller units, which is not conducive to the stable operation of the system, and when the unit time is too large (such as 30 min), it will lead to the inability to meet the needs of the user end real-time chilled water cooling capacity sum, resulting in the phenomenon of lack or waste of cooling capacity.

[0119] In a specific embodiment, the unit time is 5 min, for example, when the current real-time chilled water cooling capacity sum is greater than the last real-time chilled water cooling capacity sum, the current N1 value is greater than the N value, and the duration is greater than 5 min, the running number of the chiller units is controlled as the current N1 value.

[0120] In another specific embodiment, the unit time is 5 min, for example, when the current real-time chilled water cooling capacity sum is greater than the last real-time chilled water cooling capacity sum, and the duration that the current N1 value is greater than the N value is 1 min, the running number of the chiller units is kept unchanged.

[0121] In a specific embodiment, the working state of the chiller units is controlled by the control center, and the working state refers to running or not running.

[0122] In some optional embodiments, the air conditioning chilled water system further includes a bypass line, which is arranged in parallel with any chilled water line serving a user. When only one chiller is operating and the total real-time chilled water cooling capacity of each user per unit time is still less than 35% of the rated cooling capacity of the single chiller, the bypass line is controlled to ensure the cooling capacity required for safe system operation. The bypass line is connected to divert excess chilled water cooling capacity, allowing water to circulate between the bypass line and the chilled water pump, thereby preventing damage to the chilled water line at the end user due to excessive pressure.

[0123] In a more specific embodiment, the control center calculates excess cooling capacity based on the difference between 35% of the rated cooling capacity of a single chiller and the total real-time chilled water cooling capacity of the user, and controls the opening of the bypass valve in the bypass pipeline based on the excess cooling capacity. Specifically, the greater the excess cooling capacity, the greater the bypass valve opening.

[0124] It should be noted that the opening range of the bypass valve in the bypass pipeline is 0-25%. This is because when the bypass valve is opened too large, a large amount of chilled water will mix with the hot water return water flowing through the user, and the return water temperature will drop accordingly. When the return water temperature drops too low (for example, less than or equal to 17°C), the chiller will stop refrigerating or even be damaged.

[0125] In a specific embodiment, the unit time is 5 to 10 minutes.

[0126] In some optional embodiments, the air-conditioning chilled water system includes at least two chilled water pumps connected in parallel; the frequency and the number of chilled water pumps in operation within the next unit mapping time period are controlled according to the supply demand cooling capacity.

[0127] In a specific embodiment, the operating frequency and operating state of any chilled water pump are controlled by the control center, and the operating state refers to whether the pump is running or not running.

[0128] In a specific embodiment, when the supply demand cooling capacity is so small that it can be met by the operating frequency of only one water pump: the control center controls one chilled water pump in the air-conditioning chilled water system to operate, and the other chilled water pumps do not operate, and adjusts the operating frequency of the running chilled water pump according to the supply demand cooling capacity; the specific adjustment method of the operating frequency of a running chilled water pump is: when the calculated supply demand cooling capacity of the next unit mapping time period is greater than the water cooling capacity of the current air-conditioning chilled water system, increase the water pump frequency in the next unit mapping time period; when the calculated supply demand cooling capacity of the next unit mapping time period is less than the water cooling capacity of the current air-conditioning chilled water system, reduce the chilled water pump frequency in the next unit mapping time period.

[0129] It should be noted that in actual work, the energy consumption of a single chilled water pump is higher when the running frequency is at the highest running frequency; therefore, when the running frequency of the chilled water pump reaches more than 90% of the highest running frequency and is stably running at this frequency for a certain period of time (for example, 3-10 minutes), the control increases the number of water pumps turned on to reduce the running frequency of a single water pump and save energy consumption.

[0130] It should be noted that the rated frequency of a conventional water pump is 50 Hz, and the recommended maximum running frequency is less than the rated frequency by 2-5 Hz. In a specific embodiment, when the supply demand for cold energy increases and the highest running frequency of one or more chilled water pumps still cannot meet the demand, the control center judges the running frequency for a certain period of time, and if it is determined that the running frequency of the chilled water pump is greater than 85% of the corresponding chilled water cooling capacity of the highest running frequency of the chilled water pump within the time period, the control increases the number of chilled water pumps turned on to meet the supply demand for cold energy.

[0131] It should be noted that the safe running frequency of a single chilled water pump is in the range of 20-30 Hz, and in actual work, the minimum running frequency of the chilled water pump is generally greater than the safe running frequency by 2-5 Hz. In a specific embodiment, when the supply demand for cold energy is excessive and the minimum running frequency of multiple chilled water pumps still exceeds the supply demand for cold energy, the control center judges the running frequency for a certain period of time, and if it is determined that the running frequency of the chilled water pump is less than 1.2 times the minimum running frequency within the time period, the control reduces the number of chilled water pumps turned on to meet the supply-demand balance. The minimum number of chilled water pumps is greater than or equal to 1.

[0132] In a specific embodiment, when a water pump in a running state fails, the control center can also monitor the working state of the chilled water pump in real time to determine whether it has failed. When it is determined that it has failed, the control center controls other chilled water pumps in parallel to be in a working state to meet the cold energy demand of the system.

[0133] The supply and return water temperature of each user terminal in the embodiment is real-time change, the control center judges whether it exceeds the set target supply and return water temperature range according to the change of the supply and return water temperature, if it is judged that it exceeds the set target supply and return water temperature range, the control center adjusts the opening degree of the cooling capacity-flow integrated control valve to increase or decrease to maintain the supply and return water temperature in the set range, so the chilled water flow through each user is real-time change, the frequency of the chilled water pump is automatically controlled by the control center, the control center adjusts the working frequency of the chilled water pump according to the supply demand cooling capacity, the opening degree of the cooling capacity-flow integrated control valve, the working frequency and the number of working stations of the chilled water pump, the working number of the water chiller unit and the opening degree of the bypass valve are comprehensively controlled by the control center, the chilled water cooling capacity of the user terminal can be distributed according to the demand, the supply and demand balance of the chilled water system of the air conditioner can be achieved, and the energy saving effect can be achieved.

[0134] In view of the technical problems in the prior art, the application further provides a control device of an air conditioner chilled water system.

[0135] Please refer to Figure 9 , the control device of the air conditioner chilled water system at least comprises: a real-time chilled water supply water temperature acquisition module 901, a real-time chilled water return water temperature acquisition module 902, a real-time supply and return water temperature difference acquisition module 903, and a cooling capacity-flow integrated control valve control module 904.

[0136] The real-time chilled water supply water temperature acquisition module 901 is used to acquire the real-time chilled water supply water temperature of each user in the air conditioner chilled water system, the real-time chilled water return water temperature acquisition module 902 is used to acquire the real-time chilled water return water temperature of each user in the air conditioner chilled water system, the real-time supply and return water temperature difference acquisition module 903 is used to acquire the real-time supply and return water temperature difference of each user in the air conditioner chilled water system, and the cooling capacity-flow integrated control valve control module 904 is used to control the opening and closing degree of the cooling capacity-flow integrated control valve based on the real-time supply and return water temperature difference of each user.

[0137] Please refer to Figure 10 , the control device of the air conditioner chilled water system further comprises: an average chilled water cooling capacity total acquisition module 908, a residual cooling capacity acquisition module 909, a supply demand cooling capacity acquisition module 910, and a control module 911.

[0138] The average chilled water cooling capacity sum acquisition module 908 is configured to acquire the average chilled water cooling capacity sum of all users in the unit mapping time period based on the average chilled water cooling capacity of each user in the unit mapping time period. The surplus cooling capacity acquisition module 909 is configured to acquire the surplus cooling capacity in the next unit mapping time period based on the average chilled water cooling capacity sum of the unit mapping time. The supply-demand cooling capacity acquisition module 910 is configured to take the sum of the average chilled water cooling capacity sum of the unit mapping time and the set surplus cooling capacity as the supply-demand cooling capacity in the next unit mapping time. The control module 911 includes at least the chilled water pump working frequency control module 911a configured to adjust the working frequency of the chilled water pump in the next unit mapping time based on the corresponding supply-demand cooling capacity.

[0139] In some optional embodiments, the control module 911 further includes the chilled water pump working number control module 911b configured to control the number of running chilled water pumps in the next unit mapping time according to the supply-demand cooling capacity to ensure that the supply-demand cooling capacity is met.

[0140] In some optional embodiments, the control module 911 further includes the chilled water unit working number control module 911c configured to control the number of running chilled water units according to the real-time chilled water cooling capacity sum to ensure that the real-time chilled water cooling capacity sum is met.

[0141] In some optional embodiments, the control module 911 further includes the bypass pipeline control module 911d configured to control the bypass pipeline to be connected when only one chilled water unit is running and the average chilled water cooling capacity sum is still less than 35% of the rated cooling capacity of the chilled water unit to ensure the required cooling capacity for safe operation of the system.

[0142] In some optional embodiments, the required cooling capacity for safe operation of the system is the difference between 35% of the rated cooling capacity of the chilled water unit and the real-time chilled water cooling capacity sum of the users.

[0143] Please refer to Figure 11 The control device of the air conditioning chilled water system further includes the real-time chilled water flow acquisition module 905, the real-time chilled water cooling capacity acquisition module 906, and the average chilled water cooling capacity acquisition module 907.

[0144] The real-time chilled water flow acquisition module 905 is configured to acquire the real-time chilled water flow of each user in the air conditioning chilled water system. The real-time chilled water cooling capacity acquisition module 906 is configured to acquire the real-time chilled water flow of each user in the air conditioning chilled water system based on the real-time supply-return water temperature difference and the real-time chilled water flow of each user. The average chilled water cooling capacity acquisition module 907 is configured to acquire the average chilled water cooling capacity in the unit mapping time period based on the real-time chilled water cooling capacity data string of each user in the unit mapping time period.

[0145] In some optional embodiments, the real-time chilled water supply temperature acquisition module 901 is configured to acquire the real-time supply temperature measured by a temperature sensor arranged on the chilled water supply pipeline of the air conditioning system.

[0146] In some optional embodiments, the real-time chilled water return temperature acquisition module 902 is configured to acquire the real-time return temperature measured by a temperature sensor arranged on the chilled water return pipeline of the user side.

[0147] In some optional embodiments, the real-time chilled water flow acquisition module 905 is configured to acquire the real-time water flow measured by the chilled water flow-control valve arranged on the user side.

[0148] In some optional embodiments, the real-time supply-return temperature difference acquisition module 903 is in communication connection with the real-time chilled water supply temperature acquisition module 901 and the real-time chilled water return temperature acquisition module 902, so as to acquire the real-time supply-return temperature difference by calculating the difference between the real-time return temperature and the constant supply temperature.

[0149] In some optional embodiments, the chilled water flow-control valve control module 904 is in communication connection with the real-time supply-return temperature difference acquisition module 903, so as to adjust the opening degree of the chilled water flow-control valve according to the real-time supply-return temperature difference of each user.

[0150] In some optional embodiments, the real-time chilled water cooling capacity acquisition module 906 is in communication connection with the real-time chilled water flow acquisition module 905 and the real-time supply-return temperature difference acquisition module 903, so as to calculate the real-time chilled water cooling capacity of each user by the formula: P = m x c x ΔT / 3.6, according to the real-time chilled water flow and the real-time supply-return temperature difference of each user, wherein P is the real-time chilled water cooling capacity of each user (kW), Q is the real-time chilled water flow of each user (m 3 / h), c is the specific heat capacity of water (kJ / kg·℃), and ΔT is the real-time supply-return temperature difference of each user (℃).

[0151] In some optional embodiments, the average chilled water cooling capacity acquisition module 907 is in communication connection with the real-time chilled water cooling capacity acquisition module 906, so as to acquire the real-time chilled water cooling capacity of each user and calculate the average chilled water cooling capacity of each user in a unit mapping time by averaging the real-time chilled water cooling capacity of each user in the unit mapping time.

[0152] In some optional embodiments, the average chilled water cooling capacity total acquisition module 908 is in communication connection with the average chilled water cooling capacity acquisition module 907, so as to calculate the average chilled water cooling capacity total of all users in a unit mapping time by summing the average chilled water cooling capacity of each user in the unit mapping time.

[0153] In some optional embodiments, the surplus cold quantity acquisition module 909 is in communication connection with the average chilled water cold quantity sum acquisition module 908, and takes 5% to 10% of the average chilled water cold quantity sum in the current unit mapping time period as the surplus cold quantity value in the next unit mapping time period.

[0154] In some optional embodiments, the supply-demand cold quantity acquisition module 910 is in communication connection with the average chilled water cold quantity sum acquisition module 908 and the surplus cold quantity acquisition module 909, and adds up the average chilled water cold quantity sum surplus cold quantity of all users in the current unit mapping time period to obtain the supply-demand cold quantity in the next unit mapping time period.

[0155] In one specific embodiment, the control module 911 is a control center.

[0156] In one more specific embodiment, the control module 911 converts the supply-demand cold quantity signal into a corresponding current or voltage signal, and corresponds to a determined frequency of the chilled water pump, and sends information to a chilled water pump working frequency control module 911a and a chilled water pump working stage number control module 911b, so as to control and adjust the frequency of the chilled water pump and the working stage number of the chilled water pump, so as to guarantee the chilled water cold quantity demand of each user end and guarantee the safe and stable operation of the system.

[0157] The embodiment also provides a computer readable storage medium, which has stored thereon a computer program, and the program is called by a processor to implement the control method of the air conditioner chilled water system provided by the embodiment.

[0158] The computer readable storage medium can be a tangible device that can retain and store instructions for use by an instruction execution device. The computer readable storage medium can be, for example but not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium include a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, and a mechanical encoding device.

[0159] The computer-readable program described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in each computing / processing device.

[0160] See also Figure 12 This embodiment provides a structural diagram of an electronic device for implementing the above-mentioned control method for an air-conditioning chilled water system. The electronic device described in the present invention represents a computer for data processing and communication.

[0161] like Figure 12 As shown, the electronic device of the present invention includes at least one memory 120, at least one processor 130, and a computer program stored in the memory 120 and executable on the processor 130. The communication interface 110 is used for communication between the memory 120 and the processor 130. The processor 130 may be a dedicated or general-purpose programmable processor, the computer program may be written in any combination of one or more programming languages, and the computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as an independent software package, or entirely on a remote machine or server.

[0162] It should be noted that the division of the various modules of the above devices is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a single physical entity, or physically separated. Furthermore, these modules may be implemented entirely in the form of software called by processing elements, entirely in the form of hardware, or partially in the form of software called by processing elements and partially in the form of hardware.

[0163] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0164] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A control method for an air conditioning chilled water system, characterized in that: include: Obtaining the real-time chilled water supply temperature and the real-time chilled water return temperature of each user in the air-conditioning chilled water system; wherein the air-conditioning chilled water system includes a cooling capacity-flow integrated control regulating valve provided at the water inlet end of each user; Based on the real-time chilled water supply temperature and real-time chilled water return temperature of each user, obtain the real-time supply and return water temperature difference of each user; Based on the real-time supply and return water temperature difference of each user, the opening and closing degree of the cooling capacity-flow integrated control regulating valve is controlled; Obtaining the sum of the average chilled water cooling capacity of all users within the unit mapping time period; wherein the air conditioning chilled water system includes a chilled water pump; The sum of the average chilled water cooling capacity in the unit mapping time period and the set surplus cooling capacity is used as the supply demand cooling capacity in the next unit mapping time period; In the next unit mapping time period, the operating frequency of the chilled water pump is adjusted based on the corresponding supply and demand cooling capacity; the surplus cooling capacity is 5% to 10% of the average total chilled water cooling capacity; The unit mapping time period is 50~180s.

2. The control method according to claim 1, characterized in that: The target supply and return water temperature difference of each user end in the air-conditioning chilled water system is set to 5-6°C.

3. The control method according to claim 2, characterized in that: The method of obtaining the sum of the average chilled water cooling capacity of all users in the unit mapping time period includes: Obtain the real-time chilled water flow of each user in the air conditioning chilled water system; Based on the real-time supply and return water temperature difference and real-time chilled water flow of each user, obtain the real-time chilled water cooling capacity of each user; Based on the real-time chilled water cooling capacity data string of each user in the unit mapping time period, the average chilled water cooling capacity in the unit mapping time period is obtained; Based on the average chilled water cooling capacity of each user in the unit mapping time period, obtain the sum of the average chilled water cooling capacity of all users in the unit mapping time period; And / or, when the real-time supply and return water temperature difference at the user end exceeds the range of the target supply and return water temperature difference, the opening and closing degree of the cooling capacity-flow integrated control regulating valve is controlled to supply the required chilled water cooling capacity, and the real-time supply and return water temperature difference is kept within the range of the target supply and return water temperature difference.

4. The control method according to claim 1, wherein: The user is a floor, a communication room unit or a communication equipment unit; and / or, the air-conditioning chilled water system includes one or more users, and any user is arranged in parallel with any other user based on a chilled water pipeline; and / or, the air-conditioning chilled water system is provided with a thermometer at the water supply end and the return water end of each user to monitor the supply water temperature and the return water temperature in real time; and / or, the air-conditioning chilled water system includes at least 2 chillers connected in parallel with each other.

5. The control method according to claim 4, characterized in that: When the number of operating chillers in the air-conditioning chilled water system is ≥1, and the total real-time chilled water cooling capacity of the users increases to more than 85% of the rated cooling capacity of the chillers with the current number of operating units, and remains unchanged within the unit time, the number of operating chillers is controlled to increase to ensure that the total real-time chilled water cooling capacity is met; and / or, when the number of operating chillers in the air-conditioning chilled water system is >1, and the total real-time chilled water cooling capacity of the users is less than 40% of the rated cooling capacity of the chillers with the current number of operating units, and remains unchanged within the unit time, the number of operating chillers is controlled to decrease; and / or, the air-conditioning chilled water system also includes a bypass pipeline, which is arranged in parallel with any chilled water pipeline serving the user; when only one chiller is in operation and the total real-time chilled water cooling capacity of each user within the unit time is still less than 35% of the rated cooling capacity of the single chiller, the bypass pipeline is controlled to be connected to ensure the cooling capacity required for safe operation of the system.

6. The control method according to claim 5, characterized in that: The unit time is 5 to 10 minutes, and / or the cooling capacity required to ensure safe operation of the system is the difference between 35% of the rated cooling capacity of the chiller and the total cooling capacity of the user's real-time chilled water.

7. The control method according to claim 1, characterized in that: The air-conditioning chilled water system includes at least two chilled water pumps connected in parallel, and the operating frequency and / or number of chilled water pumps in the next unit mapping time period are controlled according to the supply demand cooling capacity to ensure that the supply demand cooling capacity is met.

8. A control device for an air-conditioning chilled water system, characterized in that: The control device at least includes: The real-time chilled water supply temperature acquisition module is used to obtain the real-time chilled water supply temperature of each user in the air-conditioning chilled water system; Real-time chilled water return temperature acquisition module, used to obtain the real-time chilled water return temperature of each user in the air-conditioning chilled water system; Real-time supply and return water temperature difference acquisition module, used to obtain the real-time supply and return water temperature difference of each user in the air-conditioning chilled water system; The cooling capacity-flow integrated control regulating valve control module is used to control the opening and closing degree of the cooling capacity-flow integrated control regulating valve based on the real-time supply and return water temperature difference of each user; An average chilled water cooling capacity sum acquisition module is used to acquire the average chilled water cooling capacity sum of all users in the unit mapping time period based on the average chilled water cooling capacity of each user in the unit mapping time period; The surplus cooling capacity acquisition module is used to obtain the surplus cooling capacity in the next unit mapping time period based on the average total chilled water cooling capacity of the unit mapping time; The supply and demand cooling capacity acquisition module is used to take the sum of the average chilled water cooling capacity in the unit mapping time period and the set surplus cooling capacity as the supply and demand cooling capacity in the next unit mapping time period; The chilled water pump operating frequency control module is used to adjust the operating frequency of the chilled water pump based on the corresponding supply demand cooling capacity within the next unit mapping time period.

9. The control device according to claim 8, characterized in that The control device further comprises: Real-time chilled water flow acquisition module, used to obtain the real-time chilled water flow of each user in the air-conditioning chilled water system; A real-time chilled water cooling capacity acquisition module is used to obtain the real-time chilled water cooling capacity of each user in the air-conditioning chilled water system based on the real-time supply and return water temperature difference and real-time chilled water flow of each user; An average chilled water cooling capacity acquisition module is used to acquire the average chilled water cooling capacity within a unit mapping time period based on the real-time chilled water cooling capacity data string of each user within the unit mapping time period; And / or, the control device further comprises a chiller operating number control module, which is used to control the operating number of the chillers according to the real-time total chilled water cooling capacity to ensure that the real-time total chilled water cooling capacity is met; And / or, the control device further comprises a chilled water pump operating number control module, which is used to control the operating number of chilled water pumps in the next unit mapping time period according to the supply demand cooling capacity to ensure that the supply demand cooling capacity is met; And / or, the control device also includes a bypass pipe control module, which is used to control the bypass pipe to be connected to ensure the cooling capacity required for safe operation of the system when only one chiller is operating and the average total chilled water cooling capacity is still less than 35% of the rated cooling capacity of the chiller.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and the computer program is used to enable a processor to implement the control method according to any one of claims 1 to 7 when executed.

11. An electronic device, characterized in that: The electronic device includes: a processor, a memory, and a computer program; the memory is communicatively connected to the processor, the memory stores the computer program, and the processor executes the computer program to implement the control method according to any one of claims 1 to 7.

Images