Application And Development Of Energy-Saving Technology On Industrial Cold-storage Door

Cold-storage door is the access for goods passing. It needs to be opened and closed frequently. So the door has become the most easily damaged part of the cold-storage. The design, manufacture and installation quality of cold-storage door is significant for cold-storage utility.At present there are two problems in using the cold-storage door. The first one is the problem of cold-storage door damage, and the other one is the energy consumption. Especially the first problem is very critical. If it is not solved properly, it would lead to the cold-storage out of work directly. The cold-storage door is damaged mainly by the collision when it closing so fast. And the energy consumption about cold-storage door is also worth to emphasize. It includes two aspects: The direct consumption such as energy consumption of motor and cold-storage door frame warming, the indirect consumption such as the coldflowing out for the door opening too long.According to the problems it would solve them with three parts in this paper. The first part was the research on the velocity control of cold-storage door. It supposed to solve the problem of cold-storage door's collision damage when it closing. It proposed to adopt the frequency conversion technology for controlling the velocity of cold-storage door. So it could make the door run fast at the first stage of closing, and run more slowly at the end. Then that would avoid the collision of cold-storage door. At the same time it would decrease the cold flowing out. So it not only improved the using life of cold-storage door but also make managing the cold-storage door easily.The second part was the research on heating equipment of cold-storage door frame. It mainly solved the problem of heater strip's excessive energy consumption. It proposed a new heating method with heated heat transfer oils in this paper. Then it designed and manufactured the heating equipment. At last it certify the equipment with numerical simulation and trail separately. The results showed that the equipment had great energy efficiency benefit.The third part was the research on intelligent control of cold-storage door. It solved the problem of cold flowing out, cold-storage door crashing on vehicles and trouble warning. It proposed the door and air curtain cooperating technology, collision avoiding technology and fault treatment technology based on PLC technology in this paper. After the trial the results showed that the technologies above completely meet the requirement of cold-storage door application. After adopting the proposed technologies the cold-storage door had great ability of energy conservation. And it could be managed conveniently. The trials and the application showed that the technologies proposed in this paper were very practical.