Freeze-drying device with multistage energy recycling function

Abstract

A freeze-drying device with a multistage energy recycling function disclosed in the invention, comprises a cooler, a cold air generator, a compressor, an expansion valve, a cold energy recoverer, a fluid heat recoverer, a freeze-drying warehouse equipped with a radiation heating plate, a cold trap warehouse equipped with a cold trap, and pipelines for communication. The cold trap warehouse is communicated with the cooler, the cold energy recoverer and the compressor through the pipelines and a conversion valve arranged on the pipeline; the cold air generator is also communicated with the coldenergy recoverer, the cooler and the compressor through the pipelines and a conversion valve arranged on the pipeline; the freeze-drying warehouse is communicated with a packaged air conditioner, or is connected with a freezing room into an integration, or the freeze-drying warehouse and the freezing room are arranged independently, and the freeze-drying warehouse is arranged in the packaged air conditioner or the freezing room. According to the invention, the investment of the device can be reduced, a freeze-drying process can be automatically complete after one charging, the costs of the freeze-drying device and products are reduced, and the popularization of the freeze-drying technology can be provided a strong product support.

Description

technical field [0001] The invention belongs to freeze drying equipment. Background technique [0002] Freeze-dried food produces a lot of waste heat in the industrial production process. For example, in the freezing stage, the condenser of the refrigeration system discharges a large amount of heat while freezing at a low temperature; of heat. On the other hand, heating the freeze-dried items in the freeze-drying warehouse requires a lot of heat; removing ice or frost on the cold trap also requires a lot of heat; cleaning the raw materials of freeze-dried products (food, medicine) and using warm water also consumes a lot of energy. heat. In the prior art and the freeze-drying equipment used, most of them use electric heating or fossil fuels to heat hot water to melt ice, heat silicone oil to heat the radiant plate in circulation, or use electric heating tubes to directly heat the radiant plate to dry the food in the freeze-drying warehouse. Use less waste heat generated i...

AI Technical Summary

Problems solved by technology

On the other hand, heating the freeze-dried items in the freeze-drying warehouse requires a lot of heat; removing ice or frost on the cold trap also requires a lot of heat; cleaning the raw materials of freeze-dried products (food, medicine) and using warm water also consumes a lot of energy. heat

In the prior art and the freeze-drying equipment used, most of them use electric heating or fossil fuels to heat hot water to melt ice, heat silicone oil to heat the radiant plate in circulation, or use electric heating tubes to directly heat the radiant plate to dry the food in the freeze-drying warehouse. Minimize the use of waste heat generated in the system

However, the patent application No. 200820232344.5 discloses a device that utilizes the waste heat of the refrigeration system to heat ice-melting hot water. The medium used for melting ice is hot water. This method can make use of part of the waste heat, but it only Part of the waste heat can be recovered, and in this method, there must be energy exchange equipment for heating hot water and a hot water circulation system

Therefore, it is necessary to add some equipment to the equipment in the prior art; a large amount of metal materials are wasted, the cost increases, and the operation process is cumbersome, and the process cold energy loss is more

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