The manufacturer of small household rice mills believes that the processing effect of the hybrid rice mill is good, which can effectively ensure the output and work efficiency. At present, the widely used hybrid rice mill in China is the NS type spiral groove sand roller rice mill, which consists of sand loading and iron unloading. The rice grains will gradually become thinner and softer from the mouth to the exit. The smaller the volume of the rice grains will not be overly ground. The rice grains coming out of the sand roller rice milling chamber will directly enter the iron roller rice milling chamber for secondary milling. This will make the processed rice grains have a better color and less broken rice.

The manufacturer of small household rice mills believes that the research on rice mills with retained germ abroad is mainly concentrated in Japan, and Japan's rice mill manufacturing industry with retained germ has always been at the forefront of the world. The domestic market for rice mills with retained embryos has been dominated by a large number of Japanese brands. Domestic rice mills with independent intellectual property rights that retain embryos have not yet been put into mass production, and related research and reports are relatively scarce. The manufacturing processes and equipment principles are mostly based on the prototypes of foreign rice mills with raw materials, imitating or cooperating in production. The development pace is slow and there is no industrialization. Therefore, the development of rice mills should strive towards the direction of rice mills that retain embryos, optimize and innovate the working principle and equipment of rice mills, increase the embryo retention rate, and pay attention to independent intellectual property rights, increase the degree of emphasis, and gradually achieve mass production.

The manufacturer of small household rice milling machines believes that the embryo mass of brown rice is only 2% of the whole rice, but it contains more than half of the nutrients and is a very nutritious part of brown rice. Therefore, the nutritional value of germ rice is much higher than that of polished rice and brown rice. Leftover rice is rich in high-quality protein, various unsaturated fatty acids, vitamins and minerals, etc. This plays a positive role in promoting the secretion of hormones in the human body and lowering cholesterol. At the same time, long-term consumption of leftover rice can also lower blood A levels, regulate fat, and prevent cardiovascular diseases, making it highly valuable for consumption. The protein content in leftover rice accounts for approximately 20%, and the composition of essential amino acids is very similar to that of FAO and WHO proteins in grains. Its nutritional value is comparable to that of soy protein and egg protein. In addition, there is a natural active tripeptide - glutathione, which is available in both oxidized and reduced forms. Among them, the reduced form has a stronger antioxidant capacity and is currently the research direction.

The manufacturer of small household rice milling machines believes that the unsaturated fatty acids in the raw rice account for 70% to 80% of the total fatty acids, mainly including linoleic acid, palmitic acid, linolenic acid, etc. It can prevent atherosclerosis and cardiovascular and cerebrovascular diseases. The mineral content in raw rice is much higher than that in polished rice, especially the calcium and magnesium content, which is five times that of ordinary polished rice. The content of silicon and zinc is nine times that of ordinary polished rice.

The manufacturer of small household rice mills believes that the embryo retention technology currently applied in rice mills is essentially the process of extracting the bran layer and the aleurone layer from the rice. However, there are some differences in the rice milling process, but the principle of rice milling is basically the same. The current structural form of the rice mill mainly consists of a white rice milling roller and a white rice milling bin surrounded by a sieve plate. The rice mill will also be equipped with corresponding power devices, transmission devices and feeding and discharging ports. Inside the white grinding chamber, there is a certain gap between the white grinding roller and the screen cylinder wall, forming a circular cylindrical space. After brown rice enters the white grinding bin through the aggregate inlet, intense white grinding occurs, thereby pressing out the bran layer and the aleurone layer.