In terms of market, China's export market of plant extract
products is relatively stable, the United States, Japan, France, has been the
main market of plant extract products. In recent years, Mexico and India have
also imported a large number of Chinese herbal products, mainly pigment
products. Plant extracts export market in 2011, except Latin America slightly
tightened, other continents showed significant growth in exports and volume.
Asia, Europe and North America are still the main export regions of China's
plant extracts, and the export to these three regions accounted for 82.6% of
China's total export of plant extracts in 2011.
Asian market: China's export of plant extracts to Asia is $440
million, accounting for 39.4%, Japan, Southeast Asia and Western Europe are the
main export markets of Chinese plant extracts. The United States accounted for
13.91% of the total, mainly because dietary supplement use has become a habit
for most Americans, which has led to an increase in demand for plant extracts
in the world's largest dietary supplement market. In Japan and South Korea,
mulberry leaf extract and other cosmetic products are mainly used; As the
world's largest herbal medicine market in Europe, products with plant extracts
as raw materials are favored by local consumers
Southeast Asia, Middle East, Africa and other emerging markets of plant extracts. Shaanxi Kepler Biotech Co.,Ltd , https://www.keplerherb.com
Fault 1: The crank handle does not correspond to the feed position. Reason: The mechanical transmission part is misaligned. Maintenance method: adjust the corresponding position, then install the belt and tighten the positioning card, and add oil lubrication to the moving friction part. 
Fault 2: The cold station temperature display error code F13, F7 operation failure, reason: the cold stage temperature sensor is invalid. This sensor is a negative temperature coefficient thermistor. The resistance is about 6kΩ at 25°C. In emergency use, a 10K potentiometer can be used on the P5 socket to adjust the temperature of the cold stage to -40°C, or directly to the P5 plug. Except that the cold stage temperature shows "-", everything else is normal and does not affect the use. 
Fault 3: The cooling effect is reduced for two reasons: one is that the condensing radiator has poor heat dissipation, and the other is that the evaporator is frosted seriously. Treatment methods: First, clean the radiator, rinse with water; second, defrosting, defrosting every stop, especially in summer, the humidity is high, it is easy to frost, try to reduce the number of door opening. 
Fault 4: No refrigeration, the refrigerant used in this machine is R502, which is extremely volatile. If the refrigeration system leaks R502 will volatilize within a few days, be careful to avoid using corrosive disinfectant to clean the machine and disinfect the room. After the refrigeration system checks for trapping, the refrigerant R502 is about 600g, and when the compressor is working, it shows a high pressure of 8î€5kg/cm2 and a low pressure of 0î€1kg/cm2.
4 kinds of fault repair of cryostat
The cryostat is an indispensable device for the hospital pathology department. It is used to extract the frozen cryosection of the tissue during surgery and provide pathological basis for the operation. The freezing temperature of the cryostat is below -30 °C, and the temperature can reach -50 °C by adding a semiconductor refrigeration station. The working principle of various brand equipment is basically the same. Take the Shandun 620E cryostat as an example, combining several faults to introduce its maintenance method. 