Cold trap system of freeze-drying equipment

Abstract

The cold trap system of the freeze-drying equipment comprises a coil pipe, the coil pipe comprises an upper-layer coil pipe and a lower-layer coil pipe, the upper-layer coil pipe and the lower-layer coil pipe are each of a double-layer structure, the double-layer structures are communicated through a bent section, an inlet end is arranged at a port of one layer of each double-layer structure, an outlet end is arranged at a port of the other layer of each double-layer structure, and the inlet end is communicated with the outlet end. The inlet ends of the upper-layer coil pipe and the lower-layer coil pipe are provided with a common liquid inlet, and the outlet ends of the upper-layer coil pipe and the lower-layer coil pipe are provided with a common gas-liquid mixture outlet. According to the cold trap system of the freeze-drying equipment, due to the fact that the coil pipe structure is designed in a single circulation mode, refrigerant liquid input from the liquid inlet can be output from the gas-liquid mixture outlet only through one circulation, the liquid supply resistance of the refrigerant liquid is greatly reduced, the operation energy consumption of the freeze-drying equipment is reduced, and meanwhile the energy consumption of the freeze-drying equipment is reduced. The cooling speed of the cold trap is accelerated, and the refrigeration effect of the cold trap is enhanced.

Description

technical field [0001] The invention relates to freeze-drying equipment, in particular to a cold trap system of the freeze-drying equipment. Background technique [0002] Freeze-drying equipment, also known as vacuum freeze-drying equipment, is to sublimate the moisture in the items that are frozen into a solid state, including food, in a vacuum environment, and finally dry the items. The sublimated water is transferred to the cold trap coil of the lyophilization equipment and recondensed into ice. That is to say, during the freeze-drying process of the freeze-drying equipment, the cold trap needs to continuously capture the water vapor generated by sublimation, and the water vapor condenses on the cold trap coil to form ice, which plays the function of "water capture". In order to achieve continuous production without intervals, the existing technology uses alternating cold traps. Some of the cold traps work in the state of condensing water vapor and water, and the other p...

AI Technical Summary

Problems solved by technology

However, due to the existence of the intermediate layer coil 12 in the cold trap coil system of the prior art, the liquid must circulate at least twice in the cold trap, which will increase the liquid supply resistance of the system, resulting in insufficient liquid supply to the cold trap

At the same time, the multi-layer coil structure will also increase the operating energy consumption of the freeze-drying equipment, prolong the cooling time of the cold trap, and weaken the cooling effect

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