Freeze dryer water catcher

Abstract

The invention relates to a freeze dryer water catcher which comprises a water catcher shell and two sets of coil pipes, wherein the two sets of coil pipes are evenly distributed in the water catcher shell, vapor inlets of the two sets of coil pipes are formed in the upper portion of the water catcher shell, and vapor outlets of the two sets of coil pipes are formed in the lower portion of the water catcher shell. The vapor inlets of the two sets of coil pipes are connected with a drying box, and the vapor outlets of the two sets of coil pipes are connected with a refrigerating unit. The two sets of coil pipes are evenly distributed in the water catcher shell, vapor enters each set of coil pipe from the upper portion and leaves each set of coil pipe from the lower portion, therefore, frosting is even when the two sets of units are started, frosting is also even when one set of unit is started, the short circuit phenomenon of a vapor channel is not easy to occur, and the water catching effect is good. Due to the fact that the vapor enters each set of coil pipe from the upper portion and leaves each set of coil pipe from the lower portion, refrigerant oil is not easily stored in the coil pipes, oil can be well returned, and accidents do not easily occur to a refrigeration compressor. The improved water catcher coil pipes can obtain a satisfactory effect after running for a long time, and the expected aim is achieved.

Description

technical field [0001] The invention relates to a vacuum freeze dryer, in particular to a water catcher in the vacuum freeze dryer. Background technique [0002] Vacuum freeze dryer, referred to as freeze dryer, is a mechanical equipment for low-temperature drying of medicines, health products, food, etc. It is generally composed of seven systems and two main devices, a drying box and a water catcher. See figure 1 , The seven systems are: refrigeration system, vacuum system, hydraulic system, heat exchange system, pneumatic system, control system, cleaning and steam sterilization system. The two devices are drying box and water trap respectively. [0003] Among the seven systems, the refrigeration system is responsible for cooling the drying box and water trap. The temperature of the drying box is generally around -50°C~-60°C, and the temperature of the water trap is generally below -70°C, so that water vapor is formed under vacuum conditions. Due to the partial pressure ...

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Problems solved by technology

But when a refrigeration unit is turned on, the problem is displayed. Since only one group of coils is in the cooling state, the frosting is only half of the area of ​​the second group of coils. This brings two problems, one is inconsistent frosting, Second, water vapor easily flows through the non-frosting coil, which may easily cause frosting and short circuit, resulting in poor water capture effect

[0016] (2) Some traditional coils are top-in and bottom-out, and some are bottom-in and top-out. In the latter coil type, the refrigerated oil in the refrigerant is easy to accumulate in the coil, which will cause the refrigeration compressor to lack oil and cause accidents.

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