- Contact：Mr. Song
- Phone：0086-13705113637
- Tell：0086-0515-88809180
- Fax：0086-0515-88809181
- E-mail：jsjckt@126.com
- Address：No. 18, Rongguang Road, National High-tech Park, Yancheng City, Jiangsu Province
The four-control air conditioner means that the air-conditioning box is equipped with a cold coil and a hot coil at the same time. Each set of coils is fed in one turn, for a total of four, so it is called four controls. The two sets of water pipes are connected to cold water and hot water respectively. That is, no matter when, the cooling and heating can be switched at any time, and some rooms can be heated while others are cooled. Therefore, its standard is high and the cost is high.
Advantages of the four control systems:
1 Each end equipment can freely choose the operation mode of heating or cooling at any time, without mutual interference, and the air conditioning area served can independently control the temperature and other parameters;
2 Energy saving, all energy consumption in the system can be provided according to the requirements of the end, unlike the three control systems, there are problems of cold and heat.
In the two-regulated air-conditioning box, there is only one set of coils, one after the other, cold water in summer and hot water in winter. Such a system allows the entire area to be cooled or heated at the same time. Compared with the four regulations, it saves a water system, so its standard is relatively low and the cost is low.
Disadvantages of the four control systems:
1 Large investment, relatively complicated operation management
2 Due to the large number of pipelines, the system design becomes more complicated and the pipeline takes up a lot of space.
Due to these shortcomings, the use of the system is somewhat limited.
The “Design Standard for Energy Efficiency of Public Buildings” (GB 50189-2005) stipulates that during the whole year of operation, the air conditioning system with frequent or alternating cooling and heating conditions should be used. Therefore, it is more suitable for buildings with larger inner areas or buildings with higher standards for air conditioning and investment.
The Code for Design of Heating, Ventilation and Air Conditioning (GB 50019-2003) states: “A two-control water system should be used when the air-conditioning system operating year-round requires only the cooling and heating conversion according to the season.” The practice of mass construction of high-rise buildings in China, especially high-rise hotels, shows that from the national conditions of China, the two control systems can meet the air conditioning requirements of most hotels, and are also the air-conditioning water system widely used in multi-storey or high-rise civil buildings.
Jiangsu Jincheng Air Conditioning Engineering Co., Ltd. focuses on:
Industrial air conditioners, chemical fiber industrial air conditioners, chemical fiber industry refrigeration, textile industry air conditioners, clean room refrigeration, ventilation ducts, cooling towers, refrigeration machines and other air conditioning units and accessories.
