Cold accumulation type vacuum precooling system

The invention discloses a cold accumulation type vacuum precooling system which comprises a vacuum system and a cold accumulation system. The vacuum system comprises a vacuum box provided with a sealing door, a vacuum degree sensor and a pressure release valve, a vacuum pump, a vacuum valve and a water catcher; the cold accumulation system consists of a compressor, a condenser, a liquid storage tank, a drying filter, an expansion valve, an ice cold storage steam supplementing collector and a vapor-liquid separator; the ice cold storage steam supplementing collector consists of a closed chamber, an air header and an evaporator, wherein the air header and the evaporator are arranged in the closed chamber. According to the cold accumulation type vacuum precooling system, a cold source is icecold storage, so that the requirement for high cold capacity in the pre-cooling process is changed into a long-time cold storage process, the specification of a refrigerating unit is effectively reduced, and the reduction ran