Device for keeping fruits and vegetables fresh by using differential-pressure controlled-atmosphere precooling plates

Abstract

The invention provides a device for keeping fruits and vegetables fresh by using differential-pressure controlled-atmosphere pre-cooling plates. The device is used for keeping fruits and vegetables fresh. The device comprises: a differential-pressure controlled-atmosphere pre-cooling plate assembly which comprises two differential-pressure controlled-atmosphere pre-cooling plates, and multi-groupalternately-arranged differential-pressure controlled-atmosphere air supply plates and differential-pressure controlled-atmosphere pre-cooling air return plates which are fixed below the two differential-pressure controlled-atmosphere pre-cooling plates; a pipeline assembly which is used for connecting the two differential-pressure controlled-atmosphere pre-cooling plates and comprises an air return pipeline and an air supply pipeline; and a differential-pressure controlled-atmosphere pre-cooling unit which is simultaneously connected to the air return pipeline and the air supply pipeline, isused for receiving heat transmitted by the air return pipeline, and performs heat exchange through air cooling and radiation so as to dissipate the heat, wherein both the differential-pressure controlled-atmosphere pre-cooling air supply plates and the differential-pressure controlled-atmosphere pre-cooling air return plates are provided with internal air passages, the differential-pressure controlled-atmosphere pre-cooling air supply plates are provided with air supply ports, and the differential-pressure controlled-atmosphere pre-cooling air return plates are provided with air return ports.

Description

technical field [0001] The invention belongs to the field of fresh-keeping of fruits and vegetables, and in particular relates to a device for keeping fresh of fruits and vegetables by using a differential-pressure air-conditioning pre-cooling plate. Background technique [0002] Fresh-keeping and processing of fruits and vegetables is the "secondary economy" in agricultural production. Industrial developed countries put post-harvest storage and processing at the forefront of agriculture. Among them, 30% of the total agricultural investment in the United States is used for pre-harvest fruits and vegetables, and 70% is used for After harvest. [0003] Commonly used fresh-keeping technologies mainly include: preservative preservation, freezing preservation, high-temperature sterilization preservation, vacuum packaging preservation, modified atmosphere preservation, and active preservation. Among them, modified atmosphere preservation is a technology that prolongs the storage ...

AI Technical Summary

Problems solved by technology

MA usually refers to a fresh-keeping technology in which fruits and vegetables consume oxygen in the surrounding environment through their own respiration and produce carbon dioxide to adjust the ratio of oxygen to carbon dioxide in the storage environment. It has low operating cost and simple operation, but it takes a long time to reach the required storage conditions. , storage conditions are difficult to control, etc.

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