DDC control system central air-conditioning energy-saving central air conditioning DDC (Direct Digital Control) energy saving control system is the use Direct Digital Controller (HWC Series DDC controller), computer network technology, image processing technology to the building belongs to the operation of various types of equipment, safety conditions, energy use and energy-saving implementation of integrated automatic detection, control and management of automated control systems. Schematic: room group control system monitoring content: 1, due to refrigeration units by equipment suppliers themselves intelligent controller provides optimal control, so that the system only consider simple refrigeration unit for monitoring and control. 2, chilled water supply and return water temperature detected by computer networking on the computer display real-time temperature curve. 3, the cooling water supply and return water temperature detected by computer networking on the computer display real-time temperature curve. And in accordance with the cooling water temperature automatic start and stop the cooling tower fan Number of units in order to achieve the purpose of energy conservation, but also to maintain the cooling water supply temperature, the air conditioning host can run at a higher efficiency. 4, automatic cumulative running time of each pump, first turn the unit running time is relatively small, so that each unit is running basically the same time, the purpose is to extend the service life of the unit, reducing the depreciation rate of the host. 5, remote and on-site simultaneously display chillers, pumps, cooling tower operating status, fault status and hand automatic state, also shows electric butterfly valve and flow switch state. 6, the alarm: water pump failure alarm, cooling tower failure alarm, host failure alarm temperature and humidity control system monitors: 1, time program control unit automatic start / stop fan, with arbitrary periodic real-time time control function, start at any time through the central station stop unit, manual control unit commitment and other start-stop control mode; 2, Monitoring the fan operating status and fault signals a fault report to the central control system alarm; 3, measured by the wind pressure switch sides primary filter differential pressure exceeds a set value alarm, prompting engineers Clean or replace the filter; 4, fans, dampers, control valves Chain: A fan stops, the humidifier valve is closed, the new air valve closed, return valve closed, the table cold or heater valve closed. B unit is turned on, first open the valve, and then open the fan, and then adjust the valve. 5, the detection room temperature and humidity and outdoor temperature and humidity, according to the temperature difference between the cold water valve can be closed as much as possible, while trying to take advantage of fresh air directly to the interior, in order to achieve optimal energy savings. 6, the central station color graphics display, recording various parameters, status, alarm, record start and stop time, total running time and historical data. 7, it is recommended in order to prevent the temperature inside the unit is too low, cracking the air - water heat exchanger, fitted with antifreeze switch, when an alarm is automatically stopped when the fan, while closing the fresh air valve. When the hot water supply is restored, you should be able to re-start the fan, open a new valve and restore the unit to work properly. DDC system services and the benefits of a management company, installed in the building's DDC system can be monitored and timely operation of the building, on the problems react quickly and take effective measures. 2, the system can automatically start or stop the machinery and equipment, it does not run when unnecessary, reducing energy consumption. 3, the terminal DDC system is a powerful tool for building management, its operating system can easily manage one or more positions in a timely manner according to customer requirements or procedures to respond to requests to reduce manpower costs. 4, the DDC system than conventional systems with higher accuracy, the temperature can be maintained at a value closer to the set value, for improving the living environment and improve comfort. 5, fault diagnosis capability of the system reflects the problems in a timely manner, to take measures; reduce repair and maintenance costs. 6, DDC system can be asked to re-write a new program without having to change the hardware. Moreover, DDC system is the model system to facilitate the future expansion of buildings, such as building renovation, the system can be followed by expansion. Shenzhen Haiwei Controls is a domestic building energy conservation systems solutions provider, central air-conditioning energy-saving household billing system, central air-conditioning energy saving control for energy-saving central air conditioning DDC control, central air conditioning system pumps water tower frequency energy in one of the national high-tech technology companies. 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