Air-conditioning system of water pipes and air duct insulation must be insulated with insulation, its purpose is nothing more than to reduce the cold (heat) loss in order to facilitate energy conservation to ensure that the required clean room temperature and relative humidity, and the second summer to prevent air conditioning Pipe and cold water pipes condensation drip, the general clean room ceiling are soft (color plate or other light plate) duct condensation water dripping to the hanging items will be infiltrated into the clean room to affect the normal operation of the plant. If it is civil office buildings and hotels and other public buildings, due to cold water pipes and air duct insulation condensation dew is not good, the soft one can see a wet ceiling, printed one, unsightly. Therefore, do not see the small air-conditioning duct (water pipe) insulation problems, solve the problem of infinite trouble, the problem of spending more money is also difficult to repair. The author in 2003 to 2004 two years by a friend of care, in Shenzhen, a number of clean plant technology on the interlayer of the wind pipe dew condensation problem, in the clean room on the ground around a lot of plastic bucket to pick the drop on the ceiling Down the water, not only the indoor temperature and humidity unqualified but also affect the normal production. In the ceiling, the air duct insulation materials are all saturated with water, especially from the outer wall of the window farther depths of the air duct condensation is more serious. The owner is very headache, the construction unit also helpless. Especially in the 7,8,9 three months in recent years, the rainy season is very concentrated, these condensation drip clean plant most of the problems in the delivery one year later.
The solution to this problem mainly from two aspects, the first is to solve the performance of insulation materials and thermal insulation layer thickness; the second is to solve the ceiling of the pipe technology interlayer ventilation problems.
The first is the performance of insulation materials and insulation thickness of the problem: the current market, many varieties of insulation materials, thermal insulation properties are not the same, the price level of disparity, the commonly used non-combustible insulation materials are rock wool and glass wool; Commonly used flame retardant insulation materials are polyethylene (PEF) and rubber and plastics. When the use of rock wool and glass wool for cold pipe insulation, the outside must be used for the moisture-proof layer of aluminum foil (protective layer), if the moisture layer is not handled or damaged, the air moisture condensation will enter the fiber insulation material . The polyethylene and rubber and plastic are more closed-cell foam insulation has good insulation properties, but the market suppliers of polyethylene and rubber variety, in order to compete for low-cost product quality is difficult to guarantee. Sometimes the contract to send samples and a large number of delivery of insulation materials and fire-resistant insulation properties far worse, can not guarantee quality.
The second is the ceiling of the pipe technology interlayer ventilation problems: Practice has proved that the ceiling of the pipe technology must have ventilation mezzanine facilities, the more non-ventilated boring the more serious condensation, Condensation is rarely light, the farther away from the outside the window the more serious the phenomenon of condensation. The ceiling of the pipe technology can be used to ventilate the natural ventilation (open outside the window) can also be used mechanical ventilation naturally into the air ventilation; if the technology is a large area of sandwich the program can not solve the problem, you can also use mechanical air opposite the mechanical Exhaust ventilation.