Energy-saving control method for water-cooled central air-conditioning system

Abstract

The present application discloses an energy-saving control method for a water-cooled central air-conditioning system, which relates to the technical field of energy-saving control for central air-conditioning systems. By presetting an interval time and a record amount threshold, after each detection and when the record amount is greater than the record amount threshold, it is determined whether the current indoor environmental load is the same as the recorded indoor environmental load record or whether the data change degree of the two is less than a first parameter matching threshold. If so, the best operating state record of the indoor environmental load record with the smallest data change degree is retrieved to form a control instruction; if not, it is determined whether the sum of the data change degrees of the current outdoor temperature, the number of people indoors and the outdoor temperature record and the indoor number of people record is less than a second parameter matching threshold. If so, the corresponding best operating state record is retrieved to issue a control instruction. If not, the current outdoor temperature and the number of people indoors are used as new outdoor temperature records and indoor number records, and the indoor environmental load record and the best operating state record are recorded.

Description

Technical Field

[0001] The present application relates to the technical field of energy-saving control of central air-conditioning systems, and in particular to an energy-saving control method for a water-cooled central air-conditioning system. Background Art

[0002] At present, water-cooled central air conditioning system is a widely used centralized cooling method, especially in large public buildings. Its basic working principle is to take chilled water through the refrigeration main machine, and transport it to the air conditioning terminal device through the chilled water pump. After heat exchange with the air, it takes away the heat of the room to achieve the cooling function. At the same time, the return water temperature of the chilled water rises and then re-enters the refrigeration main machine for cooling, and the cycle works in this way.

[0003] The existing water-cooled central air conditioning system has long pipes and large chilled water capacity. The chilled water temperature changes have a significant lag relative to the terminal load fluctuations. When the terminal load changes, the chilled water temperature cannot be reflected in time, resulting in a large mismatch between the operating status of the air conditioning system and the actual cooling demand at the terminal. This lag often causes a deviation between the actual cooling capacity and the required cooling capacity, affecting the user's comfort experience. Summary of the invention

[0004] The present application aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the present application is to propose an energy-saving control method for a water-cooled central air-conditioning system, which improves the comfort of the user's cooling experience.

[0005] One aspect of the present application provides an energy-saving control method for a water-cooled central air-conditioning system, comprising:

[0006] Step S100: using a human body sensor counting device to obtain the data on the number of people entering and leaving the room, transmitting the data on the number of people to the automatic control system, and calculating the current number of people in the room through the automatic control system to obtain a record of the number of people in the room;

[0007] Step S200: using an environmental sensor device to collect outdoor temperature and transmit it to the automatic control system to obtain an outdoor temperature record;

[0008] Step S300: Design and fit the indoor environmental load function. The automatic control system calculates the indoor environmental load according to the current number of people indoors and the outdoor temperature and records it as an indoor environmental load record. The automatic control system records the operating status information of each electrical device when the system energy efficiency value is the highest under the current indoor environmental load as the optimal operating status record.

[0009] Step S400: The automatic control system detects the outdoor temperature and the number of people indoors every T interval, and calculates the current indoor environmental load, and jumps to step S500 after each detection;

[0010] Step S500: Determine whether the current indoor environmental load is the same as the recorded indoor environmental load record or whether the data change degree between the two is less than the first parameter matching threshold. If so, retrieve the optimal operating state record corresponding to the indoor environmental load record with the smallest data change degree, and form a control instruction to be sent to the water-cooled central air-conditioning system; if not, determine whether the sum of the data change degrees between the current outdoor temperature, the number of people indoors and the recorded outdoor temperature record and the number of people indoors is less than the second parameter matching threshold. If so, retrieve the outdoor temperature record and the indoor number of people record corresponding to the minimum sum of the data change degrees, and send the control instruction to the water-cooled central air-conditioning system based on the corresponding optimal operating state record. If not, use the current outdoor temperature and the number of people indoors as new outdoor temperature records and indoor number records, and record its indoor environmental load record and optimal operating state record.

[0011] Step S600: When the amount of indoor environmental load recorded by the automatic control system is greater than the amount threshold, the process returns to step S500 and immediately generates a control instruction and sends it to the water-cooled central air-conditioning system;

[0012] The specific method of using the human body sensor counting device to obtain the change data of the number of people entering and leaving the room, transmitting the change data of the number of people to the automatic control system, and calculating the current number of people in the room through the automatic control system to obtain the record of the number of people in the room is:

[0013] Step S110: arranging a human body sensor counting device on each indoor entrance and exit door;

[0014] Step S120: collecting the change in the number of people entering and leaving the room through a human body sensor counting device to obtain the number change data Δn(t); wherein Δn(t) represents the change in the number of people entering and leaving the room at time t;

[0015] Step S130: the human body sensor counting device transmits the number of people change data to the automatic control system;

[0016] Step S140: the automatic control system integrates the number of people change data collected by all human body sensor counting devices, calculates the current number of people in the room, and records the current number of people in the room as the indoor number record at that moment;

[0017] The calculation formula for the number of people in the room is: N(t)=N(t-1)+Δn(t), where N(t-1) represents the number of people in the room at time t-1, and N(t) represents the number of people in the room at the current time t;

[0018] The specific method of using the environmental sensor device to collect the outdoor temperature and transmit it to the automatic control system to obtain the outdoor temperature record is:

[0019] Step S210: configuring an environment sensor device outdoors;

[0020] Step S220: The environment sensor device collects the outdoor temperature T out (t), and transmit the outdoor temperature to the automatic control system;

[0021] Step S230: the automatic control system records the current outdoor temperature as the outdoor temperature record at that moment;

[0022] The specific method of designing and fitting the indoor environmental load function, the automatic control system calculating the indoor environmental load according to the current number of people indoors and the outdoor temperature and recording it as the indoor environmental load record, and the automatic control system recording the operating status information of each electrical device when the system energy efficiency value is the highest under the current indoor environmental load as the optimal operating status record is:

[0023] Step S310: designing an indoor environmental load function, fitting the fitting parameters of the indoor environmental load function according to the number of people indoors, outdoor temperature and indoor environmental load obtained from the experiment, and obtaining a fitted indoor environmental load function;

[0024] The functional expression of the indoor environmental load function is: L(t)=α×N(t)+β×T out (t)+γ×N(t)×T out (t)+δ×N(t) 2 +ε×T out (t) 2 , where α, β, γ, δ, and ε are fitting parameters, and L(t) is the indoor environmental load at the current time t;

[0025] Step S320: Based on the indoor environmental load function, the automatic control system uses the current number of people indoors and the outdoor temperature to calculate the current indoor environmental load, and uses the indoor environmental load as the indoor environmental load record at the current moment;

[0026] Step S330: The automatic control system calculates the system energy efficiency value according to the ratio between the cooling capacity of the water-cooled central air-conditioning system and the total input power consumed by the water-cooled central air-conditioning system, finds the operating status information of each electrical device of the water-cooled central air-conditioning system when the system energy efficiency value is the highest under the current indoor environmental load, and records the operating status information as the best operating status record under the corresponding indoor environmental load record;

[0027] The calculation formula of the system energy efficiency value is: Among them, EER is the system energy efficiency value, Q cooling is the cooling capacity of the water-cooled central air-conditioning system, P input The total input power consumed by the water-cooled central air-conditioning system;

[0028] The specific method of judging whether the current indoor environmental load is the same as the recorded indoor environmental load record or whether the data change degree between the two is less than the first parameter matching threshold, and if so, retrieving the optimal operating state record corresponding to the indoor environmental load record with the smallest data change degree, and forming a control instruction to be sent to the water-cooled central air-conditioning system is:

[0029] The recorded indoor environmental load records constitute an indoor environmental load record set, traverse each indoor environmental load record in the indoor environmental load record set, calculate the data change degree between the indoor environmental load record and the current indoor environmental load, and determine whether there is an indoor environmental load record in the indoor environmental load record set that is the same as the current indoor environmental load;

[0030] If it exists, the data change degree between the two is 0, and the optimal operating state record corresponding to the indoor environmental load record is directly retrieved. The automatic control system generates a control instruction based on the optimal operating state record and sends it to the water-cooled central air-conditioning system;

[0031] If it does not exist, determine whether the data change between the current indoor environmental load and the indoor environmental load record is less than the first parameter matching threshold. If so, obtain the indoor environmental load record with the smallest data change, and generate a control instruction based on the optimal operating state record corresponding to the indoor environmental load record and send it to the water-cooled central air-conditioning system; if not, add the current indoor environmental load as a new indoor environmental load record to the indoor environmental load record set;

[0032] The calculation formula of the data variation degree is: Among them, L rec (i) is the i-th indoor environmental load record in the indoor environmental load record set, ΔL(i) is the data change between the i-th indoor environmental load record and the current indoor environmental load;

[0033] The calculation formula for the sum of the data change between the current outdoor temperature, the number of people indoors and the recorded outdoor temperature record, the number of people indoors is: Among them, T out，rec (j) is the jth recorded outdoor temperature record, N rec (j) is the jth recorded number of people in the room, ΔTN(j) is the sum of the data changes between the current outdoor temperature, the number of people in the room and the jth recorded outdoor temperature, the number of people in the room;

[0034] When the amount of indoor environmental load recorded by the automatic control system is greater than the amount threshold, the specific method of returning to step S500 to immediately generate a control instruction and send it to the water-cooled central air-conditioning system is:

[0035] A record quantity threshold M is set. When the record quantity of the indoor environmental load record set recorded by the automatic control system is greater than the record quantity threshold, step S500 is immediately triggered to find the most matching indoor environmental load record and its optimal operating status record according to the current outdoor temperature and the number of people indoors, and form a control instruction to be sent to the water-cooled central air-conditioning system.

[0036] One aspect of the present application provides an energy-saving control system for a water-cooled central air-conditioning system, comprising:

[0037] The indoor number recording module is used to obtain the number of people entering and leaving the room by using a human body sensor counting device, transmit the number change data to the automatic control system, calculate the current number of people in the room through the automatic control system, and obtain the indoor number record;

[0038] The outdoor temperature recording module is used to collect the outdoor temperature using an environmental sensor device and transmit it to the automatic control system to obtain the outdoor temperature record;

[0039] The environmental load calculation module is used to design and fit the indoor environmental load function. The automatic control system calculates the indoor environmental load according to the current number of people indoors and the outdoor temperature and records it as the indoor environmental load record. The automatic control system records the operating status information of each electrical device when the system energy efficiency value is the highest under the current indoor environmental load as the optimal operating status record;

[0040] The interval instruction control module is used to preset the interval time T. The automatic control system detects the outdoor temperature and the number of people indoors every T seconds and calculates the current indoor environmental load. After each detection, it jumps to the instruction issuing and updating module.

[0041] The instruction issuing and updating module is used to determine whether the current indoor environmental load is the same as the recorded indoor environmental load record or whether the data change degree between the two is less than the first parameter matching threshold. If so, the optimal operating state record corresponding to the indoor environmental load record with the smallest data change degree is retrieved to form a control instruction and issue it to the water-cooled central air-conditioning system; if not, it is determined whether the sum of the data change degrees between the current outdoor temperature, the number of people indoors and the recorded outdoor temperature record and the number of people indoors is less than the second parameter matching threshold. If so, the outdoor temperature record and the indoor number of people record corresponding to the minimum sum of the data change degrees are retrieved, and the control instruction is issued to the water-cooled central air-conditioning system based on the corresponding optimal operating state record. If not, the current outdoor temperature and the number of people indoors are used as new outdoor temperature records and indoor number records, and its indoor environmental load record and the optimal operating state record are recorded;

[0042] The instant command control module is used to return to the command issuing and updating module when the record volume of the indoor environmental load recorded by the automatic control system is greater than the record volume threshold, and immediately form a control command to be issued to the water-cooled central air-conditioning system.

[0043] One aspect of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, steps in a method for energy-saving control of a water-cooled central air-conditioning system are implemented.

[0044] One aspect of the present application provides a readable storage medium storing a computer program suitable for loading by a processor to execute steps in a method for energy-saving control of a water-cooled central air-conditioning system.

[0045] The energy-saving control method of a water-cooled central air-conditioning system proposed in this application has the following advantages over the prior art:

[0046] The present application uses a human body sensor counting device and an environmental sensor device to obtain real-time data on the number of people entering and leaving the room and the outdoor temperature, which is more accurate and timely than traditional timed statistics or manual records.

[0047] This application designs a complex, nonlinear indoor environmental load function that comprehensively considers multiple factors such as the number of people, temperature, change, interactive influence, time correlation, etc., and has high fitting accuracy.

[0048] This application proposes two parameter matching thresholds, which are used to judge load changes and environmental parameter changes respectively, realizing adaptive control strategy selection for different change situations, and dynamically adjusting the control strategy according to the matching degree between historical data and current data, reflecting adaptability and intelligence.

[0049] This application introduces interval duration and recording volume thresholds. While regularly detecting changes in load and environmental parameters, the amount of historical data is monitored synchronously. When the amount of historical data recorded reaches a certain level, a rapid response strategy is triggered to ensure the accuracy and timeliness of control. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A method flow chart of an energy-saving control method for a water-cooled central air-conditioning system provided in this application;

[0051] Figure 2 A schematic diagram of data flow between various parts of a water-cooled central air-conditioning system energy-saving control method provided in this application;

[0052] Figure 3 A flow chart of the method for changing the operating state of a water-cooled central air-conditioning system provided in this application;

[0053] Figure 4 A functional module diagram of an energy-saving control system for a water-cooled central air-conditioning system provided in this application. DETAILED DESCRIPTION

[0054] In order to better understand the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0055] In the accompanying drawings, the size, dimensions and shapes of the elements have been slightly adjusted for ease of illustration. The drawings are for illustration only and are not strictly drawn to scale. As used herein, the terms "substantially", "approximately" and similar terms are used as terms of approximation, not as terms of degree, and are intended to illustrate the inherent deviations in measurements or calculations that will be recognized by those of ordinary skill in the art. In addition, in this application, the order in which the steps are described does not necessarily represent the order in which these processes occur in actual operation, unless otherwise specified or can be derived from the context.

[0056] It should also be understood that expressions such as "including", "comprising", "having", "containing" and / or "comprising" are open rather than closed expressions in this specification, which indicate the presence of the stated features, elements and / or components, but do not exclude the presence of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features rather than just the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0057] Unless otherwise specified, all words (including engineering terms and scientific and technological terms) used in this article have the same meaning as those commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that, unless clearly stated in this application, words defined in common dictionaries should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and should not be interpreted in an idealized or overly formal sense.

[0058] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0059] Example 1

[0060] like Figure 1As shown, a water-cooled central air-conditioning system energy-saving control method provided by the present application includes:

[0061] Step S100: using a human body sensor counting device to obtain the data on the number of people entering and leaving the room, transmitting the data on the number of people to the automatic control system, and calculating the current number of people in the room through the automatic control system to obtain a record of the number of people in the room;

[0062] The specific method of using the human body sensor counting device to obtain the change data of the number of people entering and leaving the room, transmitting the change data of the number of people to the automatic control system, and calculating the current number of people in the room through the automatic control system to obtain the record of the number of people in the room is:

[0063] Step S110: arranging a human body sensor counting device on each indoor entrance and exit door;

[0064] Step S120: collecting the change in the number of people entering and leaving the room through a human body sensor counting device to obtain the number change data Δn(t); wherein Δn(t) represents the change in the number of people entering and leaving the room at time t;

[0065] Step S130: the human body sensor counting device transmits the number of people change data to the automatic control system;

[0066] Step S140: the automatic control system integrates the number of people change data collected by all human body sensor counting devices, calculates the current number of people in the room, and records the current number of people in the room as the indoor number record at that moment;

[0067] The calculation formula for the number of people in the room is: N(t)=N(t-1)+Δn(t), where N(t-1) represents the number of people in the room at time t-1, and N(t) represents the number of people in the room at the current time t;

[0068] Step S200: using an environmental sensor device to collect outdoor temperature and transmit it to the automatic control system to obtain an outdoor temperature record;

[0069] The specific method of using the environmental sensor device to collect the outdoor temperature and transmit it to the automatic control system to obtain the outdoor temperature record is:

[0070] Step S210: configuring an environment sensor device outdoors;

[0071] Step S220: The environment sensor device collects the outdoor temperature T out (t), and transmit the outdoor temperature to the automatic control system;

[0072] Among them, T out (t) represents the outdoor temperature at the current time t;

[0073] Step S230: the automatic control system records the current outdoor temperature as the outdoor temperature record at that moment;

[0074] The above steps provide a data basis for refined control by accurately grasping the changes in the number of people indoors and the outdoor temperature in real time. Automated data collection reduces manual workload and improves data collection efficiency.

[0075] Step S300: Design and fit the indoor environmental load function. The automatic control system calculates the indoor environmental load according to the current number of people indoors and the outdoor temperature and records it as an indoor environmental load record. The automatic control system records the operating status information of each electrical device when the system energy efficiency value is the highest under the current indoor environmental load as the optimal operating status record.

[0076] The specific method of designing and fitting the indoor environmental load function, the automatic control system calculating the indoor environmental load according to the current number of people indoors and the outdoor temperature and recording it as the indoor environmental load record, and the automatic control system recording the operating status information of each electrical device when the system energy efficiency value is the highest under the current indoor environmental load as the optimal operating status record is:

[0077] Step S310: designing an indoor environmental load function, fitting the fitting parameters of the indoor environmental load function according to the number of people indoors, outdoor temperature and indoor environmental load obtained from the experiment, and obtaining a fitted indoor environmental load function;

[0078] The functional expression of the indoor environmental load function is: L(t)=α×N(t)+β×T out (t)+γ×N(t)×T out (t)+δ×N(t) 2 +ε×T out (t) 2 , where α, β, γ, δ, and ε are fitting parameters, and L(t) is the indoor environmental load at the current time t;

[0079] The above indoor environmental load function takes into account the linear effects of indoor population and outdoor temperature, as well as their interaction and quadratic effects.

[0080] Step S320: Based on the indoor environmental load function, the automatic control system uses the current number of people indoors and the outdoor temperature to calculate the current indoor environmental load, and uses the indoor environmental load as the indoor environmental load record at the current moment;

[0081] Step S330: The automatic control system calculates the system energy efficiency value according to the ratio between the cooling capacity of the water-cooled central air-conditioning system and the total input power consumed by the water-cooled central air-conditioning system, finds the operating status information of each electrical device of the water-cooled central air-conditioning system when the system energy efficiency value is the highest under the current indoor environmental load, and records the operating status information as the best operating status record under the corresponding indoor environmental load record;

[0082] The calculation formula of the system energy efficiency value is: Among them, EER is the system energy efficiency value, Q cooling is the cooling capacity of the water-cooled central air-conditioning system, P input The total input power consumed by the water-cooled central air-conditioning system;

[0083] The total input power consumed by the water-cooled central air-conditioning system refers to the sum of the input power of all electrical equipment in the water-cooled central air-conditioning system, and the electrical equipment includes but is not limited to compressors, water pumps and cooling tower fans;

[0084] The operating status information of the electrical equipment is measured in real time through sensors, frequency converters, etc. installed on each device.

[0085] The optimal operating state record provides an optimization target for equipment control under different load conditions, which helps to improve the overall energy efficiency of the system.

[0086] Step S400: The automatic control system detects the outdoor temperature and the number of people indoors every T interval, and calculates the current indoor environmental load, and jumps to step S500 after each detection;

[0087] Preferably, the interval time T is 10 minutes;

[0088] Step S500: Determine whether the current indoor environmental load is the same as the recorded indoor environmental load record or whether the data change degree between the two is less than the first parameter matching threshold. If so, retrieve the optimal operating state record corresponding to the indoor environmental load record with the smallest data change degree, and form a control instruction to be sent to the water-cooled central air-conditioning system; if not, determine whether the sum of the data change degrees between the current outdoor temperature, the number of people indoors and the recorded outdoor temperature record and the number of people indoors is less than the second parameter matching threshold. If so, retrieve the outdoor temperature record and the indoor number of people record corresponding to the minimum sum of the data change degrees, and send the control instruction to the water-cooled central air-conditioning system based on the corresponding optimal operating state record. If not, use the current outdoor temperature and the number of people indoors as new outdoor temperature records and indoor number records, and record its indoor environmental load record and optimal operating state record.

[0089] The values ​​of the first parameter matching threshold and the second parameter matching threshold are set by those skilled in the art based on experience; preferably, the first parameter matching threshold and the second parameter matching threshold are equal to 5% or 10%;

[0090] The specific method of judging whether the current indoor environmental load is the same as the recorded indoor environmental load record or whether the data change degree between the two is less than the first parameter matching threshold, and if so, retrieving the optimal operating state record corresponding to the indoor environmental load record with the smallest data change degree, and forming a control instruction to be sent to the water-cooled central air-conditioning system is:

[0091] The recorded indoor environmental load records constitute an indoor environmental load record set, traverse each indoor environmental load record in the indoor environmental load record set, calculate the data change degree between the indoor environmental load record and the current indoor environmental load, and determine whether there is an indoor environmental load record in the indoor environmental load record set that is the same as the current indoor environmental load;

[0092] If it exists, the data change degree between the two is 0, and the optimal operating state record corresponding to the indoor environmental load record is directly retrieved. The automatic control system generates a control instruction based on the optimal operating state record and sends it to the water-cooled central air-conditioning system;

[0093] If it does not exist, determine whether the data change between the current indoor environmental load and the indoor environmental load record is less than the first parameter matching threshold. If so, obtain the indoor environmental load record with the smallest data change, and generate a control instruction based on the optimal operating state record corresponding to the indoor environmental load record and send it to the water-cooled central air-conditioning system; if not, add the current indoor environmental load as a new indoor environmental load record to the indoor environmental load record set;

[0094] The calculation formula of the data variation degree is: Among them, L rec (i) is the i-th indoor environmental load record in the indoor environmental load record set, ΔL(i) is the data change between the i-th indoor environmental load record and the current indoor environmental load;

[0095] The calculation formula for the sum of the data change between the current outdoor temperature, the number of people indoors and the recorded outdoor temperature record, the number of people indoors is: Among them, T out，rec (j) is the jth recorded outdoor temperature record, N rec (j) is the jth recorded number of people in the room, ΔTN(j) is the sum of the data changes between the current outdoor temperature, the number of people in the room and the jth recorded outdoor temperature, the number of people in the room;

[0096] Figure 3 A flow chart of the method for changing the operating state of a water-cooled central air-conditioning system provided in this application;

[0097] Step S600: When the amount of indoor environmental load recorded by the automatic control system is greater than the amount threshold, the process returns to step S500 and immediately generates a control instruction and sends it to the water-cooled central air-conditioning system;

[0098] When the amount of indoor environmental load recorded by the automatic control system is greater than the amount threshold, the specific method of returning to step S500 to immediately generate a control instruction and send it to the water-cooled central air-conditioning system is:

[0099] A record quantity threshold M is set. When the record quantity of the indoor environmental load record set recorded by the automatic control system is greater than the record quantity threshold, step S500 is immediately triggered to find the most matching indoor environmental load record and its optimal operating status record according to the current outdoor temperature and the number of people indoors, and form a control instruction to be sent to the water-cooled central air-conditioning system.

[0100] The value of the record amount threshold M is set by those skilled in the art based on experience.

[0101] Figure 2 A schematic diagram of data flow between various parts of an energy-saving control method for a water-cooled central air-conditioning system provided in this application.

[0102] Example 2

[0103] like Figure 4 As shown, a water-cooled central air-conditioning system energy-saving control system provided by the present application includes:

[0104] The indoor number recording module is used to obtain the number of people entering and leaving the room by using a human body sensor counting device, transmit the number change data to the automatic control system, calculate the current number of people in the room through the automatic control system, and obtain the indoor number record;

[0105] The outdoor temperature recording module is used to collect the outdoor temperature using an environmental sensor device and transmit it to the automatic control system to obtain the outdoor temperature record;

[0106] The environmental load calculation module is used to design and fit the indoor environmental load function. The automatic control system calculates the indoor environmental load according to the current number of people indoors and the outdoor temperature and records it as the indoor environmental load record. The automatic control system records the operating status information of each electrical device when the system energy efficiency value is the highest under the current indoor environmental load as the optimal operating status record;

[0107] The interval instruction control module is used to preset the interval time T. The automatic control system detects the outdoor temperature and the number of people indoors every T seconds and calculates the current indoor environmental load. After each detection, it jumps to the instruction issuing and updating module.

[0108] The instruction issuing and updating module is used to determine whether the current indoor environmental load is the same as the recorded indoor environmental load record or whether the data change degree between the two is less than the first parameter matching threshold. If so, the optimal operating state record corresponding to the indoor environmental load record with the smallest data change degree is retrieved to form a control instruction and issue it to the water-cooled central air-conditioning system; if not, it is determined whether the sum of the data change degrees between the current outdoor temperature, the number of people indoors and the recorded outdoor temperature record and the number of people indoors is less than the second parameter matching threshold. If so, the outdoor temperature record and the indoor number of people record corresponding to the minimum sum of the data change degrees are retrieved, and the control instruction is issued to the water-cooled central air-conditioning system based on the corresponding optimal operating state record. If not, the current outdoor temperature and the number of people indoors are used as new outdoor temperature records and indoor number records, and its indoor environmental load record and the optimal operating state record are recorded;

[0109] The instant command control module is used to return to the command issuing and updating module when the record volume of the indoor environmental load recorded by the automatic control system is greater than the record volume threshold, and immediately form a control command to be issued to the water-cooled central air-conditioning system.

[0110] Example 3

[0111] According to another aspect of the present application, an electronic device is provided. The electronic device may include one or more processors and one or more memories. The memories store computer-readable codes, and when the computer-readable codes are executed by one or more processors, the energy-saving control method of a water-cooled central air-conditioning system as described above may be executed.

[0112] The method or system according to the embodiment of the present application can also be implemented with the help of the architecture of an electronic device. The electronic device may include a bus, one or more CPUs, a read-only memory (ROM), a random access memory (RAM), a communication port connected to a network, an input / output component, a hard disk, etc. A storage device in the electronic device, such as a ROM or a hard disk, can store a water-cooled central air-conditioning system energy-saving control method provided in the present application. A method for energy-saving control of a water-cooled central air-conditioning system may, for example, include: step S100: using a human body sensor counting device to obtain data on changes in the number of people entering and leaving the room, transmitting the data on the number of people changing to an automatic control system, calculating the current number of people indoors through the automatic control system, and obtaining a record of the number of people indoors; step S200: using an environmental sensor device to collect the outdoor temperature and transmitting it to the automatic control system to obtain a record of the outdoor temperature; step S300: designing and fitting an indoor environmental load function, the automatic control system calculates the indoor environmental load according to the current number of people indoors and the outdoor temperature and records it as an indoor environmental load record, and the automatic control system records the operating status information of each electrical device when the system energy efficiency value is the highest under the current indoor environmental load as the best operating status record; step S400: presetting an interval time T, the automatic control system detects the outdoor temperature and the number of people indoors every T seconds, and calculates the current indoor environmental load, and jumps to execute step S500 after each detection; step S500: judging whether the current indoor environmental load is consistent with the recorded indoor environmental load The load records are the same or the data variation between the two is less than the first parameter matching threshold. If so, the optimal operating state record corresponding to the indoor environmental load record with the smallest data variation is retrieved, and a control instruction is formed and sent to the water-cooled central air-conditioning system; if not, it is determined whether the sum of the data variation between the current outdoor temperature, the number of people indoors and the recorded outdoor temperature record and the number of people indoors is less than the second parameter matching threshold. If so, the outdoor temperature record and the indoor number record corresponding to the minimum sum of the data variation are retrieved, and the control instruction is sent to the water-cooled central air-conditioning system based on the corresponding optimal operating state record. If not, the current outdoor temperature and the number of people indoors are used as new outdoor temperature records and indoor number records, and the indoor environmental load record and the optimal operating state record are recorded; Step S600: When the record amount of the indoor environmental load record recorded by the automatic control system is greater than the record amount threshold, return to execute step S500, and immediately form a control instruction and send it to the water-cooled central air-conditioning system. Further, the electronic device may also include a user interface. Of course, when implementing different devices, one or more components in the electronic device can be omitted according to actual needs.

[0113] Example 4

[0114] According to one embodiment of the present application, a readable storage medium is also proposed. Computer-readable instructions are stored on the computer-readable storage medium. When the computer-readable instructions are executed by the processor, a water-cooled central air-conditioning system energy-saving control method according to an embodiment of the present application described with reference to the above figures can be executed. The storage medium includes, but is not limited to, for example, volatile memory and / or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and cache memory (cache), etc. Non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc.

[0115] In addition, according to the implementation mode of the present application, the process described in the above reference flowchart can be implemented as a computer software program. For example, the present application provides a non-temporary machine-readable storage medium, the non-temporary machine-readable storage medium stores machine-readable instructions, the machine-readable instructions can be executed by a processor to execute instructions corresponding to the method steps provided in the present application, for example: Step S100: Use a human body sensor counting device to obtain the change data of the number of people entering and leaving the room, transmit the change data of the number of people to the automatic control system, calculate the current number of people indoors through the automatic control system, and obtain the indoor number record; Step S200: Use an environmental sensor device to collect the outdoor temperature and transmit it to the automatic control system to obtain the outdoor temperature record; Step S300: Design and fit the indoor environmental load function, the automatic control system calculates the indoor environmental load according to the current number of people indoors and the outdoor temperature and records it as the indoor environmental load record, the automatic control system records the operating status information of each electrical device when the system energy efficiency value is the highest under the current indoor environmental load as the optimal operating status record; Step S400: Preset the interval length T, the automatic control system detects the outdoor temperature and the number of people indoors every T, and calculates the current indoor environmental load, and jumps to execute step S after each detection 500; Step S500: Determine whether the current indoor environmental load is the same as the recorded indoor environmental load record or whether the data change degree between the two is less than the first parameter matching threshold. If so, retrieve the optimal operating state record corresponding to the indoor environmental load record with the smallest data change degree, and generate a control instruction to be sent to the water-cooled central air-conditioning system; if not, determine whether the sum of the data change degrees between the current outdoor temperature, the number of people indoors and the recorded outdoor temperature record and the number of people indoors is less than the second parameter matching threshold. If so, retrieve the outdoor temperature record and the indoor number of people record corresponding to the minimum sum of the data change degrees, and send a control instruction to the water-cooled central air-conditioning system based on the corresponding optimal operating state record. If not, use the current outdoor temperature and the number of people indoors as new outdoor temperature records and indoor number records, and record its indoor environmental load record and optimal operating state record; Step S600: When the record amount of the indoor environmental load record recorded by the automatic control system is greater than the record amount threshold, return to execute step S500, and immediately generate a control instruction to be sent to the water-cooled central air-conditioning system. When the computer program is executed by a central processing unit (CPU), the above functions defined in the method of the present application are performed.

[0116] The methods, apparatuses, and devices of the present application may be implemented in many ways. For example, the methods, apparatuses, and devices of the present application may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above order of steps for the method is for illustration only, and the steps of the method of the present application are not limited to the order specifically described above unless otherwise specified. In addition, in some embodiments, the present application may also be implemented as programs recorded in a recording medium, which include machine-readable instructions for implementing the method according to the present application. Therefore, the present application also covers recording media storing programs for executing the method according to the present application.

[0117] In addition, the parts of the above-mentioned technical solutions provided in the embodiments of the present application that are consistent with the implementation principles of the corresponding technical solutions in the prior art are not described in detail to avoid excessive redundancy.

[0118] The specific implementation modes as described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation mode of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water-cooled central air-conditioning system energy-saving control method, characterized in that: include: Step S100: using a human body sensor counting device to obtain the data on the number of people entering and leaving the room, transmitting the data on the number of people to the automatic control system, and calculating the current number of people in the room through the automatic control system to obtain a record of the number of people in the room; Step S200: using an environmental sensor device to collect outdoor temperature and transmit it to the automatic control system to obtain an outdoor temperature record; Step S300: Design and fit the indoor environmental load function. The automatic control system calculates the indoor environmental load according to the current number of people indoors and the outdoor temperature and records it as an indoor environmental load record. The automatic control system records the operating status information of each electrical device when the system energy efficiency value is the highest under the current indoor environmental load as the optimal operating status record. Step S400: The automatic control system detects the outdoor temperature and the number of people indoors every T interval, and calculates the current indoor environmental load, and jumps to step S500 after each detection; Step S500: Determine whether the current indoor environmental load is the same as the recorded indoor environmental load record or whether the data change degree between the two is less than the first parameter matching threshold. If so, retrieve the optimal operating state record corresponding to the indoor environmental load record with the smallest data change degree, and form a control instruction to be sent to the water-cooled central air-conditioning system; if not, determine whether the sum of the data change degrees between the current outdoor temperature, the number of people indoors and the recorded outdoor temperature record and the number of people indoors is less than the second parameter matching threshold. If so, retrieve the outdoor temperature record and the indoor number of people record corresponding to the minimum sum of the data change degrees, and send the control instruction to the water-cooled central air-conditioning system based on the corresponding optimal operating state record. If not, use the current outdoor temperature and the number of people indoors as new outdoor temperature records and indoor number records, and record its indoor environmental load record and optimal operating state record. Step S600: When the record amount of the indoor environmental load record recorded by the automatic control system is greater than the record amount threshold, the process returns to step S500 and immediately generates a control instruction and sends it to the water-cooled central air-conditioning system.

2. The energy-saving control method for a water-cooled central air-conditioning system according to claim 1, characterized in that: The specific method of using the human body sensor counting device to obtain the change data of the number of people entering and leaving the room, transmitting the change data of the number of people to the automatic control system, and calculating the current number of people in the room through the automatic control system to obtain the record of the number of people in the room is: A human body sensor counting device is installed on each indoor entrance and exit door; The human body sensor counting device collects the change in the number of people entering and leaving the room, and obtains the number change data Δn(t); wherein Δn(t) represents the change in the number of people entering and leaving the room at time t; The human body sensor counting device transmits the data of the number of people change to the automatic control system; The automatic control system integrates the data of the number of people collected by all human sensor counting devices, calculates the current number of people in the room, and records the current number of people in the room as the indoor number record at that moment; The calculation formula for the number of people indoors is: N(t)=N(t-1)+Δn(t), wherein N(t-1) represents the number of people indoors at time t-1, and N(t) represents the number of people indoors at current time t.

3. The energy-saving control method for a water-cooled central air-conditioning system according to claim 2, characterized in that: The specific method of designing and fitting the indoor environmental load function, the automatic control system calculating the indoor environmental load according to the current number of people indoors and the outdoor temperature and recording it as the indoor environmental load record, and the automatic control system recording the operating status information of each electrical device when the system energy efficiency value is the highest under the current indoor environmental load as the optimal operating status record is: Design an indoor environmental load function, fit the fitting parameters of the indoor environmental load function according to the number of people indoors, outdoor temperature and indoor environmental load obtained from the experiment, and obtain the fitted indoor environmental load function; The functional expression of the indoor environmental load function is: L(t)=α×N(t)+β×T out (t)+γ×N(t)×T out (t)+δ×N(t) 2 +ε×T out (t) 2 , where α, β, Y, δ, and ε are fitting parameters, and L(t) is the indoor environmental load at the current time t; Based on the indoor environmental load function, the automatic control system uses the current number of people indoors and the outdoor temperature to calculate the current indoor environmental load, and uses the indoor environmental load as the indoor environmental load record at the current moment; The automatic control system calculates the system energy efficiency value according to the ratio between the cooling capacity of the water-cooled central air-conditioning system and the total input power consumed by the water-cooled central air-conditioning system, finds the operating status information of each electrical equipment of the water-cooled central air-conditioning system when the system energy efficiency value is the highest under the current indoor environmental load, and records the operating status information as the best operating status record under the corresponding indoor environmental load record; The calculation formula of the system energy efficiency value is: Among them, EER is the system energy efficiency value, Q cooling is the cooling capacity of the water-cooled central air-conditioning system, P input It is the total input power consumed by the water-cooled central air-conditioning system.

4. The energy-saving control method for a water-cooled central air-conditioning system according to claim 3, characterized in that: The specific method of judging whether the current indoor environmental load is the same as the recorded indoor environmental load record or whether the data change degree between the two is less than the first parameter matching threshold, and if so, retrieving the optimal operating state record corresponding to the indoor environmental load record with the smallest data change degree, and forming a control instruction to be sent to the water-cooled central air-conditioning system is: The recorded indoor environmental load records constitute an indoor environmental load record set, traverse each indoor environmental load record in the indoor environmental load record set, calculate the data change degree between the indoor environmental load record and the current indoor environmental load, and determine whether there is an indoor environmental load record in the indoor environmental load record set that is the same as the current indoor environmental load; If it exists, the data change degree between the two is 0, and the optimal operating state record corresponding to the indoor environmental load record is directly retrieved. The automatic control system generates a control instruction based on the optimal operating state record and sends it to the water-cooled central air-conditioning system; If it does not exist, determine whether the data change between the current indoor environmental load and the indoor environmental load record is less than the first parameter matching threshold. If so, obtain the indoor environmental load record with the smallest data change, and generate a control instruction based on the optimal operating state record corresponding to the indoor environmental load record and send it to the water-cooled central air-conditioning system; if not, add the current indoor environmental load as a new indoor environmental load record to the indoor environmental load record set; The calculation formula of the data variation degree is: Among them, L rec (i) is the i-th indoor environmental load record in the indoor environmental load record set, and ΔL(i) is the data change degree between the i-th indoor environmental load record and the current indoor environmental load.

5. The energy-saving control method for a water-cooled central air-conditioning system according to claim 4, characterized in that: The calculation formula for the sum of the data change between the current outdoor temperature, the number of people indoors and the recorded outdoor temperature record, the number of people indoors is: Among them, T out，rec (j) is the jth recorded outdoor temperature record, N rec (j) is the jth recorded number of people indoors, and ΔTN(j) is the sum of the data changes between the current outdoor temperature, the number of people indoors and the jth recorded outdoor temperature, the number of people indoors.

6. The energy-saving control method for a water-cooled central air-conditioning system according to claim 5, characterized in that: When the amount of indoor environmental load recorded by the automatic control system is greater than the amount threshold, the specific method of returning to step S500 to immediately generate a control instruction and send it to the water-cooled central air-conditioning system is: A record quantity threshold M is set. When the record quantity of the indoor environmental load record set recorded by the automatic control system is greater than the record quantity threshold, step S500 is immediately triggered to find the most matching indoor environmental load record and its optimal operating status record according to the current outdoor temperature and the number of people indoors, and form a control instruction to be sent to the water-cooled central air-conditioning system.

7. A water-cooled central air-conditioning system energy-saving control system, which is implemented based on a water-cooled central air-conditioning system energy-saving control method according to any one of claims 1 to 7, characterized in that: include: The indoor number recording module is used to obtain the number of people entering and leaving the room by using a human body sensor counting device, transmit the number change data to the automatic control system, calculate the current number of people in the room through the automatic control system, and obtain the indoor number record; The outdoor temperature recording module is used to collect the outdoor temperature using an environmental sensor device and transmit it to the automatic control system to obtain the outdoor temperature record; The environmental load calculation module is used to design and fit the indoor environmental load function. The automatic control system calculates the indoor environmental load according to the current number of people indoors and the outdoor temperature and records it as the indoor environmental load record. The automatic control system records the operating status information of each electrical device when the system energy efficiency value is the highest under the current indoor environmental load as the optimal operating status record; The interval instruction control module is used to preset the interval time T. The automatic control system detects the outdoor temperature and the number of people indoors every T seconds and calculates the current indoor environmental load. After each detection, it jumps to the instruction issuing and updating module. The instruction issuing and updating module is used to determine whether the current indoor environmental load is the same as the recorded indoor environmental load record or whether the data change degree between the two is less than the first parameter matching threshold. If so, the optimal operating state record corresponding to the indoor environmental load record with the smallest data change degree is retrieved to form a control instruction and issue it to the water-cooled central air-conditioning system; if not, it is determined whether the sum of the data change degrees between the current outdoor temperature, the number of people indoors and the recorded outdoor temperature record and the number of people indoors is less than the second parameter matching threshold. If so, the outdoor temperature record and the indoor number of people record corresponding to the minimum sum of the data change degrees are retrieved, and the control instruction is issued to the water-cooled central air-conditioning system based on the corresponding optimal operating state record. If not, the current outdoor temperature and the number of people indoors are used as new outdoor temperature records and indoor number records, and its indoor environmental load record and the optimal operating state record are recorded; The instant command control module is used to return to the command issuing and updating module when the record volume of the indoor environmental load recorded by the automatic control system is greater than the record volume threshold, and immediately form a control command to be issued to the water-cooled central air-conditioning system.

8. An electronic device, characterized in that: It comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps in the energy-saving control method of a water-cooled central air-conditioning system as described in any one of claims 1 to 6 are implemented.

9. A readable storage medium, characterized in that: The readable storage medium stores a computer program, and the computer program is suitable for being loaded by a processor to execute the steps in the energy-saving control method for a water-cooled central air-conditioning system as described in any one of claims 1-6.

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