Vacuum drying ovens will have different problems in the process of use. Here are some common problems and solutions: 1.Hawthorn extract Antialcoholic Liver Extract,Anti-Alcoholic Liver Extract,Liver Protection,Enhance Liver Nutrition Shaanxi Zhongyi Kangjian Biotechnology Co.,Ltd , https://www.zhongyibiology.com
1. The reason why the electric heating vacuum drying box does not have the temperature uniformity parameter is that the general electric heating (blast) drying box is provided with temperature uniformity parameters: the natural convection type drying box is the upper limit of the working temperature multiplied by 3%. The forced convection oven is the upper limit of the operating temperature multiplied by 2.5%. However, the electric vacuum drying oven does not have a temperature uniformity parameter. Why? There is almost no possibility of relying on the movement of gas molecules in the vacuum oven to make the temperature of the studio uniform. Therefore, from the conceptual point of view, we can no longer use the temperature uniformity defined by the usual electric (blast) drying oven to the vacuum drying oven. It is meaningless to set this index under vacuum. The amount of heat radiation is inversely proportional to the square of the distance, and the same object is very different from 1/4 of the heating wall by 10 cm. This phenomenon is warm when the sun is shining in the winter, and the side that is exposed to the sun is cold. It is a truth that the sun is not exposed to the sun. Because the vacuum drying oven is difficult to achieve in the three-dimensional space of the studio ( The spherical surface has a uniform radiant heat and lacks an evaluation method. This may be the reason why the temperature uniformity parameter is not included in the standard of the electric vacuum drying oven.
2. The reason for the difference between the meter reading of the electric vacuum drying oven and the glass rod thermometer reading in the vacuum chamber. Generally, the electric vacuum drying oven adopts a method of heating the wall surface of the vacuum chamber first, and then the wall is facing the workpiece for radiant heating. In this heating mode, the temperature sensor of the temperature control instrument can be arranged on the vacuum outdoor wall, and the sensor can simultaneously accept convection. Conduction, and radiant heat, while the glass rod thermometer in the vacuum chamber intelligently receives radiant heat, and because the blackness of the glass rod cannot reach 1, a considerable part of the radiant heat is refracted, so the temperature value reflected by the glass rod thermometer is definitely low. For the temperature reading of the meter, generally speaking, it is normal for the temperature reading of the meter to be within 30 degrees of the reading of the glass rod thermometer when the temperature is 200 degrees. If the temperature sensing of the temperature control instrument is placed in the vacuum chamber, the difference between the temperature value of the glass rod thermometer and the temperature reading of the meter can be reduced, but it cannot be eliminated, and the sealing reliability of the vacuum chamber increases a possible unreliable link. . If you do not want to see this difference from the practical point of view, you can use the display correction function unique to the temperature control instrument.
3. The reason why the electric vacuum drying oven first vacuums and then heats up and heats up. 1) If the heating process is performed by heating in the first step and the heated air is pumped out by the vacuum pump, the heat will be pumped up by the vacuum pump, which will cause the vacuum pump to rise. Too high, it is possible to reduce the efficiency of the vacuum pump. 2) The workpiece is placed in a vacuum box to evacuate the gas component that can be removed from the workpiece material. If the workpiece is heated first, the gas will expand when exposed to heat. Due to the very good sealing of the vacuum box, the huge pressure generated by the expanding gas may cause the observation window to rupture the tempered glass. This is a potential danger. This danger can be avoided by first vacuuming the heating process. 3) The heated gas is directed to the vacuum pressure gauge, and the vacuum pressure gauge will generate a temperature rise. If the temperature rise exceeds the temperature range specified by the vacuum gauge, the vacuum gauge may cause an indication error. The correct method of use should first be vacuumed and heated at a high temperature. If the vacuum is found to decrease after the rated temperature is reached, it is appropriate to extend the service life of the equipment.
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2.Rhubarb extract
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3, wolfberry extract
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4, Cordyceps extract
Cordyceps can improve the immune function of the body, strengthen the ability to remove viruses, protect liver cells and indirectly inhibit the occurrence and development of liver fibrosis.
5. Salvia miltiorrhiza extract
Salvia miltiorrhiza is used in more research on anti-hepatic fibrosis treatment. It can protect hepatocytes, reduce the stimulation of stellate cells by hepatocyte injury, necrosis, etc., and inhibit the initiation and development of hepatic fibrosis; the collagen content in the liver is significantly reduced, and the urinary HPP discharge is elevated, suggesting that the drug can promote the degradation of collagen that has been formed, and the proliferating collagen is reabsorbed by hydrolysis.