Cascaded phase-change cold storage box plate structure and preparation method thereof, and cold storage box

Abstract

The invention relates to the technical field of cold chain transportation, especially to a cascaded phase-change cold storage box plate structure and a preparation method thereof, and a cold storage box. The cascaded phase-change cold storage box plate structure comprises a phase change material plate, a heat preservation plate and a polyurethane plate which are sequentially arranged from inside to outside. The phase change material plate is a composite phase change material plate formed by compounding paraffin and modified silicon dioxide, and the phase change material plate, the heat preservation plate and the polyurethane plate are packaged in a cascaded coupling mode. The composite phase change material plate is adopted, and the problems that the phase change latent heat of the coolantis low, the supercooling phenomenon exists, and phase separation is likely to happen can be effectively solved, so that the heat preservation time is remarkably prolonged, and efficient, energy-saving and environment-friendly cold chain transportation is achieved; the preparation method of the box plate structure is simple in process and convenient to prepare; and moreover, the cold storage box adopts the box plate structure, and is low in overall heat conductivity coefficient, high in heat accumulation density and long in heat preservation time.

Description

technical field [0001] The invention relates to the technical field of cold chain transportation, in particular to a cascaded phase-change cold storage box plate structure, a preparation method thereof, and a cold storage box. Background technique [0002] With the rapid growth of demand for frozen food and pharmaceutical preparations, the development of cold chain transportation has also begun to develop rapidly in recent years. In order to meet the low temperature requirements of refrigerated transportation in the prior art, most of them choose to use refrigerated transport vehicles, refrigerated tanks, refrigerators, ice packs or other temperature control equipment to control the temperature during transportation. The refrigerated transport vehicles used in the prior art use active Refrigeration is used to regulate temperature, which consumes extra energy, while refrigerated tanks, ice packs and cold storage boxes mainly use thermal protection to achieve heat storage and ...

AI Technical Summary

Problems solved by technology

In order to meet the low temperature requirements of refrigerated transportation in the prior art, most of them choose to use refrigerated transport vehicles, refrigerated tanks, refrigerators, ice packs or other temperature control equipment to control the temperature during transportation. The refrigerated transport vehicles used in the prior art use active Refrigeration is used to regulate temperature, which consumes extra energy, while refrigerated tanks, ice packs and cold storage boxes mainly use thermal protection to achieve heat storage and thermal insulation to prolong the heat preservation time. The active refrigeration method consumes a lot of energy. This leads to high transportation costs. Therefore, the current common refrigerated transportation mainly uses thermal protection to keep the temperature within an acceptable range. It only needs to use off-peak power for cooling at night to achieve long-term and long-span cooling. Chain transportation has the characteristics of high efficiency, safety, and low cost. Research and optimization of such cold chain transportation boxes have a significant positive effect on improving the safety and efficiency of cold chain transportation

[0003] At present, the cold storage boxes used in cold chain transportation usually use phase change materials for temperature regulation. The phase change materials used in current cold storage boxes are mostly solid-liquid phase change materials, mainly including inorganic substances (inorganic salts, hydrated inorganic salts, etc. ) and organic substances (alcohols, acids and aliphatic hydrocarbons, etc.). However, organic phase change heat storage materials generally have low thermal conductivity, poor stability (easy to oxidize or high temperature sublimation), and flammability, which reduces the efficiency and application of heat storage systems

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