• Home

  • Products

      navName

      Products

      Main products include: large-scale livestock fans, large-scale greenhouse dedicated fans, industrial plant dedicated fans, circulation fans, roof automatic ventilators and other ventilation and cooling systems; wet curtains - fans, cold fans and other cooling and humidification systems; coal (fuel oil, electricity, gas) hot air fans, exhaust fans and other heating systems; feed towers, feed lines and other feeding systems; animal husbandry cage systems; scraper conveyor manure removal machines, belt conveyor manure removal machines and other manure removal systems.

  • About Us

      navName

      About Us

      For many years, it has been committed to the development and promotion of national environmental protection and energy-saving products. It is a high-tech enterprise specializing in the production of environmental control-related equipment and technical services.

  • Video

  • Blog

      navName

      Blog

      The company's goal is to provide customers with the best solutions for temperature and humidity control, to provide high-quality production and living environments for your greenhouses, livestock and poultry houses, industrial plants, etc., and to create the best benefits for you!

  • Contact Us

Working principle of negative pressure fan


Release time:

2025-04-24

The "fat hearing" that occurs after insulation can be divided into the following situations:
1. Conduct another 37 ℃, 7-day insulation test on the "fat hearing" that occurs after the canned food is insulated. If the degree of obesity increases, it may be due to microbial obesity, and the can should be opened for examination;
After the second insulation at 37 ℃ for 7 days, the degree of fat hearing remained unchanged, which may be chemical fat hearing;
After the second insulation at 37 ℃ for 7 days, the fat hearing disappeared, which may be physical fat hearing.
When these three situations cannot be determined, they should be treated as microbial obesity. There is leakage in the flattened container, perforation, air leakage, juice leakage, microbial obesity in the rusted container, metallic smell in the container contents, severe peeling of the inner wall coating, and decay of the contents. Canned food with these conditions should no longer be consumed.