The principle of ammonia refrigeration belongs to compression refrigeration. Different from Freon system, there are many auxiliary refrigeration machines (exhaust fan, low-pressure circulating barrel, emergency ammonia leak, ammonia pump, etc.). ). Ammonia has a large refrigeration capacity and does not destroy the ozone layer. At present, large-scale cold storage is still widely used.

70% of my business is ammonia system, and the rest is Freon system.