Concentrating and Evaporating Equipment Concentrating Equipment,Evaporating Equipment,Falling Film Evaporator Yibu Drying Equipment Co., Ltd. , http://www.czspraydryer.com
The general air drying ovens are equipped with temperature uniformity parameters (national standards): natural convection drying ovens are multiplied by 3% in working temperature, and forced convection ovens are multiplied by 2.5% in working temperature upper limit. The possibility of homogenizing the temperature of the working chamber by the movement of gas molecules in the vacuum drying oven is almost gone.
Therefore, conceptually, we can no longer use the temperature uniformity defined by a typical electric (blast) drying oven in a vacuum drying oven. Setting this indicator under vacuum is also meaningless. The amount of heat radiation is inversely proportional to the square of the distance. For the same object, the radiant heat received at a distance of 20cm from the heating wall is only 1/4 of the distance from the heating wall. big difference. This phenomenon is very warm when it comes to the sun in winter and the sun is warm to the sun. Due to the fact that the vacuum drying oven is structurally difficult to achieve uniform radiant heat at all points in the three-dimensional space of the studio, and also lacks an authoritative assessment method, this may be due to the absence of standards in the electrothermal vacuum drying oven. The cause of the temperature uniformity parameter.
Degree of degree seems to be a well-known index in the equipment industry of the ring test. The smaller the uniformity is, the higher the accuracy is, and the higher the technical content of the equipment is. The high-low temperature box, constant temperature and humidity box, cryogenic tank, and drug stabilization box are known to us. Such equipment has a degree of uniformity, are in accordance with the national standard ± 2 °C, but also according to military standards to achieve ± °C, including the oven also has its uniformity range and standard, then the vacuum drying oven uniformity requirements? As we all know, the uniformity is ensured by the wind circulation. The vacuum drying box is a closed clean space. Is there a requirement for evenness? The answer is: no.