The development history of ventilator is integrated from the old air building (skylight) and the original subordinate workshop. In the early 1990s, Jinzhou Dongdian New Building Materials Factory (the predecessor of Jinzhou Xiang Peng) and Northeast Electric Power Design Institute jointly developed a patented product "Polygonal Roof Ventilator" with equipment function, and then developed an "Arc Roof Ventilator", also known as streamlined ventilator.
Streamlined ventilator was originally used as ventilation equipment in the upper part of steam turbine room and boiler room of power plant as electrical auxiliary equipment. With the development of demand for large-scale professional ventilators in metallurgy, shipbuilding, machinery manufacturing and other industries, streamlined ventilators are also used in these industries, but some shortcomings of developing streamlined ventilators are also reflected, mainly including:
1. When the throat of a long-span factory building needs to be increased, the height and weight of the streamlined ventilator need to be increased to ensure ventilation. The bigger the throat, the greater the weight.
2. Large traditional streamlined ventilators, etc. Because of its tall features, it is easily damaged by storms and snowstorms in areas with bad weather.
Therefore, the thin ventilator with multi-unit combination and parallel channels came into being, which made the ventilator realize the technological revolution of larger throat and constant unit weight.
Thin ventilators have made important contributions to the development of ventilators, completely changing the concept that the bigger the throat of ventilators is, the higher the ventilators are. With the sharp decline in steel consumption, it has also made intangible contributions to national environmental protection. Up to now, the lightweight ventilator has developed into a diversified state. Whether Nantong Jinghai, Clark, McVeigh, Jinzhou Xiang Peng, etc. Thin ventilators with independent intellectual property rights have been developed one after another, and the development of roof ventilators has gained new life cycle and vitality.
Looking at the choice of various thin and light ventilators, users need to grasp the following key points of functions.
1, whether there is a ventilation performance test by a national authority and whether there is real ventilation performance. If the ventilator loses its ventilation performance, it will lose its meaning and affect the evolution and development of ventilation products.
2, rain and snow function. This is also one of the important functions of the ventilator. Ventilation and rain and snow protection of ventilator are contradictory, and it is the key to the life value of ventilator to solve this contradictory relationship reasonably.
Especially in extreme climate areas such as the north and coastal areas, rain and snow protection puts forward high requirements for ventilators. By comparing various thin ventilators, it is found that "truss thin ventilator", as a new product, can make the ventilation of thin ventilator with the same throat close to or exceed that of large ventilator on the premise of ensuring the largest unit ventilator. Four-fold rain protection makes rain and snow have no holes to enter, and the upper opening and closing valve plate is closed and integrated with the building roof, which makes the upper opening and closing valve plate easy to maintain safely. This product has been compiled into "Heating and Air Conditioning Design of Thermal Power Plant" in the latest edition of Power Engineering Design Manual.