The Research Of A Variable Blast Air Conditioning System Based On Vpvt Control Method

Centralized central air conditioning system is the most customer in the buildings. Energy resource is one of the most precious resources of the human being. Therefore, studying the saving air conditioning system is attached importance to by all countries in the word. In the centralized central air conditioning systems, early stage's products are constant blast air conditioning systems, now the advanced variable blast air conditioning systems are developed. In the more than twenty years developing history, the variable blast air conditioning systems go through three developing stages: constant static pressure constant temperature (CPCT) control method; constant static pressure variable temperature (CPVT) control method; variable static pressure variable temperature (VPVT) control method. The VPVT is the method of having saving energy potence, but it is more difficult to realize VPVT. In this paper, a variable blast air conditioning system based on VPVT control method is discussed. It is two stages master-slave bus control system. The variable static pressure smart coordinated control algorithm is realized by the master. The variable blast temperature intermittence PID control is realized in n slake-batch controllers. In this system, automatic throw-in, automatic parameters tuning, automatic regulation are integrated. These actions are completed automatically, customers and workers need not intervene in them. These functions are suited to the application requirements of the intelligence buildings. The smart coordinated control could make that the air blast is satisfied and have that the static pressure is lower possibly. So the saving energy is realized. Its system structure is simple and its price is cheap, The studying course make known its practical value and applied prospects of the advanced technics product.