CN108386962A - A kind of central air-conditioning energy monitoring system and its working method - Google Patents

Abstract

The invention discloses a kind of central air-conditioning energy monitoring systems, including a monitoring center and multiple power center (PC)s, the monitoring center includes monitoring center host computer, each power center (PC) is the subnet monitored in network, a slave computer is arranged in each power center (PC), one coordinator and several terminal nodes, the operating status of terminal node collection site equipment, transfer data to coordinator, coordinator gives monitoring center host computer through slave computer by LAN or Internet network timing transmission, monitoring center host computer will reach related slave computer according to the result for calculating analysis under control instruction, the coordinated device of slave computer controls the field device of central air conditioner system power center (PC) by corresponding terminal node.The present invention can be monitored building central air conditioner system field device running status, realize the global optimization operation of central air conditioner system equipment, to achieve the purpose that reduce energy consumption, energy saving to the maximum extent.

Description

A central air-conditioning energy-saving monitoring system and its working method

technical field

The invention relates to the field of Internet of Things technology and computer network technology, in particular to a central air-conditioning energy-saving monitoring system and a working method thereof.

Background technique

At present, central air conditioners have been widely used in urban office buildings, hotels, gymnasiums, guesthouses, commercial centers, hospitals and other buildings. Central air-conditioning is a tool that treats the air in the buildings where human beings work, produce, live and live to the required temperature and humidity, air flow and cleanliness. Temperature adjustment, comfortable use, small temperature fluctuations, low operating noise, and high air quality. However, while central air conditioning improves the quality of the indoor environment, it also brings huge energy consumption.

The design of the central air-conditioning system is often designed according to the local meteorological data (highest/lowest temperature) and the characteristics of the building, and considering the demand for the maximum load, a 10%-20% design margin is also reserved. Therefore, the host, water pumps, and fans all have a large margin. Due to the rotation of seasons and time changes, the central air-conditioning system runs at maximum load for a very short time throughout the year, generally less than 1%, so there is a great energy-saving potential for a large number of constant-speed motors. However, in the current central air-conditioning system, there are few reports on the energy-saving operation and management of these high-power equipment. Therefore, the present invention constructs a building central air-conditioning energy-saving monitoring system, develops node hardware on the energy-saving monitoring network, that is, a monitoring device that can be applied in the building central air-conditioning monitoring network, and performs real-time control of field devices to achieve system optimization and energy saving. purpose of operation.

Contents of the invention

Purpose of the invention: In view of the problems and deficiencies in the above-mentioned prior art, the purpose of the invention is to provide a central air-conditioning energy-saving monitoring system and its working method.

Technical solution: In order to achieve the above purpose, a central air-conditioning energy-saving monitoring system according to the present invention includes a monitoring center and a plurality of power centers, the monitoring center includes a monitoring center host computer, and each power center is a One subnet, each power center is equipped with a lower computer, a coordinator and several terminal nodes. The lower computer can be a PC or an industrial computer, and the terminal node collects the operating status of the field equipment, transmits the data to the coordinator, and coordinates The host computer of the monitoring center transmits the relevant control instructions to the lower computer and the coordinator according to the results of calculation and analysis, and the lower computer passes through the coordinator through the corresponding terminal node. The driver module controls the field devices of the central air-conditioning system.

Further, the central air-conditioning system equipment includes 3 chilled water pumps, 6 cooling towers, 3 cooling water pumps, 3 dual-working mode hosts, 3 ethylene glycol pumps, 1 ethylene glycol constant pressure and liquid replenishment device, 1 glycol supplement pump and 1 spare pump, chilled water constant pressure and fluid replenishment device, 1 chilled water supplement pump and 1 spare pump, ice storage tank, 3 heat exchangers and indoor air temperature and humidity of users, The above-mentioned equipment and the user’s indoor air are respectively connected with the terminal nodes through sensors and detection elements. The monitored analog objects of the central air-conditioning system include the inlet temperature of the primary network of the heat exchanger, the water supply and return temperature of the secondary network of the heat exchanger, and the temperature of the cooling water. Water supply and return water temperature, user indoor air temperature and humidity, primary and secondary network water supply and return water pressure, ice storage tank water inlet temperature and ice storage tank liquid level, the digital objects to be monitored include cooling towers, dual Working condition Main unit, glycol pump, chilled water pump, cooling water pump, glycol make-up pump, chilled water make-up pump working status.

Further, the terminal node includes a sub-node ZigBee module, a sensor, an A/D conversion interface circuit, a D/A conversion circuit, an amplifier circuit, and a driver module; the sub-node ZigBee module includes a general-purpose I/O port, an A/D Conversion input interface circuit, RF transceiver circuit, the general I/O port is connected to the switching value of the central air-conditioning field equipment, the A/D conversion input interface circuit is connected to the sensor, and the RF transceiver circuit is connected to the sub-node ZigBee module to realize data transmission , one end of the D/A conversion circuit is connected with the subnode ZigBee module, and the other end is connected with the input end of the amplifying circuit, and the output end of the amplifying circuit and the output end of the general I/O interface are all connected with the input end of the drive module connected, the output end of the general-purpose I/O interface is also connected to the alarm module

Further, the drive module uses an 8-way relay control board, and the 8-way relay control board includes a power interface, a trigger common port, 8 trigger ports and 8 relays, wherein each relay includes normally closed, public and There are 3 ports that are normally open, and the trigger ports include 8 ports IN1~IN8. Taking the chilled water pump node as an example, the forward and reverse rotation of the motor can be controlled through the trigger port IN1, and the high-speed and low-speed operation of the motor can be controlled through the frequency converter through the trigger port IN2.

Further, the alarm module is an audible and visual alarm, which is connected to the switch output terminal. When the terminal outputs a high level, the circuit is connected and an audible and visual alarm is issued.

Further, the lower computer is also provided with an audible and visual alarm. After the audible and visual alarm of the terminal node sends out an audible and visual alarm, the information is uploaded to the lower computer through the coordinator at the same time, and the lower computer monitors the sound and light alarm on the management interface. The device realizes the alarm. The specific process is as follows: After the terminal node collects the operating data of the field equipment, it compares and analyzes with the set value, and when it exceeds the threshold or detects an abnormal working state, it sends out an alarm signal. On the one hand, the alarm signal is transmitted to the lower position through the coordinator On the other hand, the lower computer is uploaded to the upper computer of the monitoring center for system alarm, so that the system management personnel can grasp the operation status of the entire system in time.

Further, the coordinator communicates with the terminal nodes through ZigBee network.

Further, the sensors include temperature sensors, humidity sensors, liquid level sensors and pressure sensors.

The working method of the central air-conditioning energy-saving monitoring system, the specific working method is as follows:

(1) Establish a communication connection between the upper computer, lower computer, coordinator and terminal nodes of the monitoring center, and set the sensors of the terminal nodes on the monitored components of the central air-conditioning equipment, and connect the drive module of the terminal nodes with the central air-conditioning system on-site The control terminal connection of the monitored components of the equipment;

(2) Start the coordinator, the coordinator establishes a ZigBee network, and the terminal nodes join the ZigBee network;

(3) The ZigBee module of the terminal node realizes the temperature sensor, humidity sensor, pressure sensor and liquid level sensor to realize the inlet temperature of the heat exchanger primary network, the water supply and return temperature of the heat exchanger secondary network, and the cooling water supply and return water temperature. Real-time monitoring of water temperature, user indoor air temperature and humidity, primary and secondary network water supply and return water pressure, ice storage tank inlet and outlet temperature, and ice storage tank liquid level operating parameters;

(4) The RF transceiver circuit of the terminal node is connected to the ZigBee module, sends the data to the coordinator and receives the control command from the coordinator;

(5) The coordinator summarizes and packages the data collected by the terminal nodes and uploads them to the lower computer. The monitoring and management interface of the lower computer displays the operating parameters and working status of each operating device;

(6) Then the lower computer transmits the data to the upper computer of the monitoring center through the dedicated network line;

(7) The upper computer compares each parameter with the set value. After analysis and calculation, the control command is transmitted to the lower computer, and then to the terminal node through the coordinator. The terminal node realizes on-site heat exchange by controlling the drive module. The opening of the valve, the automatic control of the chilled water pump inverter, and the optimized operation of cooling water pumps, dual-mode hosts, glycol pumps and cooling tower fans, etc., to achieve the purpose of reducing energy consumption and saving energy.

It can be seen from the foregoing technical scheme that the beneficial effects of the present invention are:

A central air-conditioning energy-saving monitoring system according to the present invention has power-saving,

Reliable operation, flexible control, etc., through temperature, humidity, pressure and liquid level sensors, the terminal node realizes the inlet temperature of the primary network of the heat exchanger, the water supply and return temperature of the secondary network of the heat exchanger, the cooling water supply and return water Real-time monitoring of operating parameters such as temperature, user's indoor air temperature and humidity, primary and secondary network water supply and return water pressure, ice storage tank inlet and outlet temperature, and ice storage tank liquid level, and send these data to the coordinator, the coordinator The data collected by the terminal nodes is summarized and packaged, and the lower computer is uploaded to the upper computer of the monitoring center through the dedicated network line. The upper computer compares each parameter with the set value, and after analysis and calculation, the relevant control instructions are sent to the lower computer. , the lower computer, through the coordinator, controls the valve opening of the on-site heat exchanger, the automatic control of the chilled water pump inverter, etc. through the corresponding terminal node, as well as the optimization of cooling water pumps, dual-working condition hosts, glycol pumps, cooling tower fans, etc. operation to achieve the purpose of reducing energy consumption and saving energy.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention;

Fig. 2 is a network node layout diagram of the power center subnet of the present invention;

Fig. 3 is the schematic diagram of the control relationship between the monitoring center upper computer, the lower computer and the central air-conditioning system field equipment in the present invention;

FIG. 4 is a schematic structural diagram of a terminal node in the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The orientations or positional relationships indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" are based on the attached The orientation or positional relationship shown in the figure is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a reference to this invention. Invention Limitations.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

A central air-conditioning energy-saving monitoring system as shown in Figure 1-3 includes a monitoring center and multiple power centers, each power center is a subnet in the monitoring network, and the monitoring center includes a monitoring center host computer 1, Each power center is equipped with a lower computer 2, a coordinator 3 and several terminal nodes 4. The terminal node 4 collects the operating status of the field equipment and transmits the data to the coordinator. The coordinator 3 passes through the lower computer through a local area network or Internet network. Timely transmission to the upper computer 1 of the monitoring center, the upper computer 1 of the monitoring center transmits the relevant control instructions to the lower computer 2 according to the calculation and analysis results, and the lower computer 2 controls the central air-conditioning system through the coordinator 3 and the drive module of the corresponding terminal node 4 field device5. Central air-conditioning system field equipment 5 includes 3 sets of chilled water pumps 51, 6 sets of cooling towers 52, 3 sets of cooling water pumps 53, 3 sets of dual-working mode hosts 54, 3 sets of ethylene glycol pumps 55, 1 set of ethylene glycol constant pressure and fluid replacement Device 56, ethylene glycol replenishment pump and spare pump 57, chilled water constant pressure and replenishment device 58, chilled water replenishment pump and spare pump 59, ice storage tank 510, three heat exchangers 511, the above equipment and indoor air pass through The sensors and detection units are connected to the terminal node 4. The monitored objects of the central air-conditioning system field equipment include the inlet temperature of the primary network of heat exchanger 511, the water supply and return water temperature of the secondary network of three heat exchangers 511, the cooling water supply and return water Water temperature, user indoor air temperature and humidity 512, primary and secondary network water supply and return water pressure, water inlet temperature of ice storage tank 510 and liquid level of ice storage tank 510, etc.

In this embodiment, the coordinator 3 includes a main node ZigBee module and an external circuit, and the main node ZigBee module 31 includes a CC2530 core board and a coordinator backplane, and the CC2530 core board is a common circuit board for the coordinator backplane and the router backplane.

As shown in Figure 4, described terminal node 4 in the present embodiment comprises subnode ZigBee module 41, sensor 42, D/A conversion circuit 43, amplifying circuit 44 and drive module 45; Described subnode ZigBee module 41 comprises general I /O port 411, A/D conversion input interface circuit 412, RF transceiver circuit 413, the general I/O port 411 is connected with the switching value 46 of the controlled part of the field device, and the A/D conversion input interface circuit 412 is connected with the sensor 42 Connect, the RF transceiver circuit 413 is connected with the sub-node ZigBee module 41 to realize data transmission, one end of the D/A conversion circuit 43 is connected with the sub-node ZigBee module 41, and the other end is connected with the input end of the amplifier circuit 44. Both the output end of the amplification circuit 44 and the output end of the general I/O interface 411 are connected to the input end of the drive module 45 , and the output end of the general I/O interface 411 is also connected to the alarm module 47 .

The alarm module 47 is an audible and visual alarm, which is connected to the monitored switch output terminal. When the terminal outputs a high level, the circuit is connected and an audible and visual alarm is issued.

What drive module 45 described in this embodiment adopts is 8-way relay control board, and described 8-way relay control board comprises power supply interface, trigger common port, 8 trigger ports and 8 relays, wherein each relay comprises normally closed, There are 3 ports, public and normally open, and the trigger ports include 8 ports IN1~IN8. Taking the node where the chilled water pump 51 is located as an example, the forward and reverse rotation of the motor can be controlled through the trigger port IN1, and the high-speed and low-speed operation of the motor can be controlled through the frequency converter through the trigger port IN2. On the premise of ensuring the flow demand, the use of frequency conversion speed regulation to adjust the flow can greatly reduce the consumption of electric energy to achieve the purpose of energy saving.

The following is an example of the control of the three chilled water pumps 51 motors M1~M3 by the terminal node ① to further illustrate that the data collected by the sensor 42 can be used to achieve the start-stop and frequency control of the three chilled water pumps 51 motors M1~M3 through the drive module. The specific process of automatic control and adjustment of the valve opening of the secondary network and the constant pressure of chilled water and the liquid replenishment device 58. The control principles of the motor speeds of the cooling water pump 53, the glycol pump 55, the glycol replenishment pump and the backup pump 57 in the system are similar to this.

Set the water supply temperature (gw) of the secondary network as 7°C, and the return water temperature (hw) as 12°C. Next, through the analysis of the specific values of the return water temperature and the water supply temperature, the drive module is used to adjust the frequency of the inverter and the opening of the valve.

(1) Start-stop adjustment of chilled water pump 51 motors M1~M3

When hw≤12.0℃, motor M1 works; when 12.0℃<hw≤13.0℃, motors M1 and M2 work simultaneously; when 13.0℃<hw, motors M1, M2 and M3 work simultaneously.

(2) Frequency adjustment of the motors M1~M3 of the chilled water pump 51

When hw≤12℃, the motor frequency is 42.6Hz; when 12℃<hw≤13℃, the motor frequency is 63.8Hz; when 13℃<hw, the motor frequency is 50.0Hz.

(3) Adjustment of the opening of the secondary network valve

When gw≤6.5℃, the valve opening is 60%; when 6.5℃<gw≤7.0℃, the valve opening is 70%; when 7.0℃≤gw, the valve opening is 80%.

(4) Chilled water make-up pump

The chilled water constant pressure and replenishment device 58 is equipped with a replenishment pump and a backup pump, and the drive module has start-stop control and over-limit alarm for the operation of the replenishment pump. By setting the limit of the liquid level, the low limit alarm of the water level and the high limit alarm of the water level of the supplementary water tank can be realized. The over-limit alarm process is as follows: set the maximum value of the liquid level (yw) to 1.0m, when yw<0.10m or 0.90m<yw and the replenishment pump fails to start normally, the on-site sound and light alarm will alarm, and at the same time the lower computer and the indicator light on the monitoring and management interface of the upper computer will turn red, and an alarm dialog box will pop up to send out an alarm.

The lower computer 2 described in this embodiment is also connected to an audible and visual alarm. After the audible and visual alarm of the terminal node 4 sends out an audible and visual alarm, the information is uploaded to the lower computer 2 through the coordinator 3 at the same time, and the lower computer 2 controls the monitoring and management interface. The acousto-optic alarm on the top will give an alarm. The specific process is as follows: After the terminal node 4 collects the operating data of the field equipment, it compares and analyzes with the set value, and when it exceeds the threshold or detects an abnormal working state, it sends out an alarm signal. The alarm signal is transmitted through the coordinator 3 on the one hand. Send the alarm to the lower computer 2 on the monitoring and management interface of the lower computer in the power center; on the other hand, upload it to the upper computer 1 in the monitoring center through the lower computer 2 for system alarm, so that the system management personnel can timely grasp the operating status of the entire system.

In this embodiment, the coordinator 3 communicates with the terminal nodes 4 through the ZigBee network.

The working method of the central air-conditioning energy-saving monitoring system in this embodiment, the specific working method is as follows:

1) Establish a communication connection between the upper computer 1, the lower computer 2, the coordinator 3 and the terminal node 4 in the monitoring center, and set the sensor to which the terminal node 4 belongs on the monitored component of the central air-conditioning equipment, and set the drive module 45 of the terminal node Connect with the control terminal of the monitored component of the central air-conditioning system field device 5;

2) Start the coordinator 3, the coordinator 3 establishes a ZigBee network, and the terminal node 4 joins the ZigBee network;

3) The sub-node ZigBee module 41 of the terminal node 4 realizes the inlet temperature of the primary network of the heat exchanger 511, the water supply and return water temperature of the secondary network of the heat exchanger 511, Real-time monitoring of cooling water supply and return water temperature, user's indoor air temperature and humidity, primary and secondary network water supply and return water pressure, ice storage tank 510 inlet and outlet temperature, and ice storage tank 510 liquid level operating parameters;

4) The RF transceiver circuit 413 of the terminal node 4 is connected to the coordinator 3, and sends the data to the coordinator 3 while receiving the control command transmitted by the coordinator 3;

5) The coordinator 3 summarizes and packages the data collected by the terminal nodes, and uploads them to the lower computer 2. The monitoring and management interface of the lower computer displays the operating parameters and working status of each operating device; system technicians and duty personnel can also pass the monitoring center The monitoring and management interface of the upper computer observes the running status of the field equipment of each power center;

6) Then the lower computer 2 transmits the data to the upper computer 1 of the monitoring center through the dedicated network line;

7) The upper computer 1 compares each parameter with the set value, and after analysis and calculation, transmits the control command to the relevant lower computer 2, and then transmits it to the corresponding terminal node 4 through the coordinator 3 to control the drive module 45 to realize on-site The valve opening of the heat exchanger 511, the automatic control of the frequency converter of the chilled water pump 51, and the optimized operation of the cooling water pump 54, the dual-working mode main engine 55, the glycol pump 56 and the cooling tower fan 53, etc., can reduce operating energy consumption, The purpose of saving energy.

The embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, various equivalents of the present invention by those skilled in the art all fall within the scope defined by the appended claims of the present application.

Claims (9)

1. a kind of central air-conditioning energy monitoring system, it is characterised in that：Including a monitoring center and multiple power center (PC)s, each Power center (PC) is a subnet in energy-saving monitoring network, and the monitoring center includes monitoring center host computer（1）, each power A centrally disposed slave computer（2）, a coordinator（3）With several terminal nodes（4）, slave computer（2）Can be PC machine or work Control machine, terminal node（4）The operating status of collection site equipment transfers data to coordinator, coordinator（3）Through slave computer （2）By LAN or Internet network timing transmission to monitoring center host computer（1）, monitoring center host computer（1）Root Relevant control is instructed down according to the result for calculating analysis and reaches slave computer（2）And coordinator（3）, coordinator（3）By corresponding Terminal node（4）Control central air conditioner system field device（5）.

2. a kind of central air-conditioning energy monitoring system according to claim 1, it is characterised in that：The central air conditioner system Field device（5）Including 3 chilled water pumps（51）, 6 cooling towers（52）, 3 cooling water pumps（53）, 3 Double-working-condition hosts （54）, 3 eg pumps（55）, 1 ethylene glycol level pressure and liquid supply device（56）, 1 ethylene glycol small pump and 1 stand-by pump （57）, chilled water level pressure and liquid supply device（58）, 1 chilled water small pump and 1 stand-by pump（59）, ice machine bin（510）, 3 Heat exchanger（511）, above equipment and user's room air pass through sensor and detecting element and terminal node respectively（4）It establishes Contact, the monitored analog quantity object of central air conditioner system includes heat exchanger（511）Level-one net inlet temperature, heat exchanger （511）Two level net supplies water and return water temperature, cooling water and return water temperature, user's indoor air temperature and humidity（512）, one Grade and the water supply of two level net and pressure of return water, ice machine bin（510）Water inlet temperature and ice machine bin（510）Liquid level, monitored number It includes cooling tower to measure object（52）, Double-working-condition host（54）, eg pump（55）, chilled water pump（51）, cooling water pump（53）, second The working condition of glycol small pump, chilled water small pump.

3. a kind of central air-conditioning energy monitoring system according to claim 1, it is characterised in that：The terminal node（4） Including child node ZigBee module（41）, sensor（42）, D/A conversion circuits（43）And amplifying circuit（44）And drive module （45）；The child node ZigBee module（41）Including universaling I/O port（411）, A/D convert input interface circuit（412）, RF receive Power Generation Road（413）, the universaling I/O port（411）With on-site terminal node（4）The switching value detected（46）Connection, A/D conversions Input interface circuit（412）With sensor（42）Connection, RF transmission circuits（413）With child node ZigBee module（41）Connection, Realize data transmission, the D/A conversion circuits（43）One end and child node ZigBee module（41）Connection, the other end and amplification Circuit（44）Input terminal connection, the amplifying circuit（44）Output end and general purpose I/O Interface（411）Output end with Drive module（45）Input terminal connection, the general purpose I/O Interface（411）Output end be also connected with alarm module（47）.

4. a kind of central air-conditioning energy monitoring system according to claim 3, it is characterised in that：The drive module（45） Using 8 tunnel relay control panels, 8 tunnel relay control panel include power interface, triggering public port, 8 touch Originator mouth and 8 relays, wherein each relay includes normally closed, public and normally opened totally 3 ports, the triggering port includes Totally 8 ports IN1 ~ IN8.

5. a kind of central air-conditioning energy monitoring system according to claim 4, it is characterised in that：The alarm module（47） For audible-visual annunciator, with switching value（46）Output end connects, and when terminal exports high level, circuit is connected, and sound-light alarm is sent out.

6. a kind of central air-conditioning energy monitoring system according to claim 5, it is characterised in that：The slave computer（2）Also Equipped with audible-visual annunciator, terminal node（4）Audible-visual annunciator send out audible and visible alarm after, while information is passed through into coordinator（3） It is uploaded to slave computer（2）, slave computer（2）It is alarmed by the audible-visual annunciator on monitoring management interface.

7. a kind of central air-conditioning energy monitoring system according to claim 1, it is characterised in that：The coordinator（3）With Terminal node（4）It is communicated using ZigBee-network.

8. a kind of central air-conditioning energy monitoring system according to claim 2, it is characterised in that：The sensor（42）Packet Include temperature sensor, humidity sensor, liquid level sensor and pressure sensor.

9. a kind of working method of central air-conditioning energy monitoring system according to claims 1-8, it is characterised in that：Specific work It is as follows to make method：

（1）By monitoring center host computer（1）, slave computer（2）, coordinator（3）And terminal node（4）Communication connection is established, and will Terminal node（4）Set sensor is mounted on central air conditioner system field device（5）On corresponding position, by terminal node（4） Drive module（45）With central air conditioner system field device（5）It is detected the terminal connection of component；

（2）Start coordinator（3）, coordinator（3）Establish ZigBee-network, terminal node（4）It is added in ZigBee-network；

（3）Terminal node（4）Child node ZigBee module（41）Pass through temperature sensor, humidity sensor, pressure sensor And liquid level sensor, it realizes to heat exchanger（511）Level-one net inlet temperature, heat exchanger（511）Two level net supplies water and return water Temperature, cooling water and return water temperature, user's indoor air temperature and humidity（512）, level-one and two level net supply water and return water Pressure, ice machine bin（510）Out temperature and ice machine bin（510）The real-time monitoring of the operating parameter of liquid level；

（4）Terminal node（4）RF transmission circuits（413）With coordinator（3）Connection is established, coordinator is sent the data to（3） And receive coordinator（3）The control instruction passed down；

（5）Coordinator（3）By terminal node（4）Collected data carry out summarizing packing, are uploaded to slave computer（2）, slave computer The operating parameter and working condition of each running equipment of monitoring management interface display；The technical staff and operator on duty of system also may be used To pass through monitoring center host computer（1）Monitoring management interface observe the operating status of each power center (PC) field device；

（6）Then slave computer（2）Monitoring center host computer is sent data to by network special line（1）；

（7）Host computer（1）Each parameter is compared with setting value, after analysis calculates, relevant control is instructed down and is reached down Position machine（2）, then pass through coordinator（3）Under reach terminal node（4）, terminal node（4）Control drive module（45）It realizes to existing Field heat exchanger（511）Valve opening, chilled water pump（51）Frequency converter automatically control and cooling water pump（53）, duplex Condition host（54）, eg pump（55）And cooling tower（52）The optimization operation control of wind turbine, achievees the purpose that reduce operation energy consumption.