Heat storage device for dryer

Abstract

The invention discloses a heat storage device for a dryer. The heat storage device comprises a heat storage chamber, an air inlet communicating with the heat storage chamber is formed in the left sideof the heat storage chamber, a linear Fresnel lens is arranged at the top of the heat storage chamber, and heat storage copper pipes are arranged inside the heat storage chamber and are connected with a fan. Compared with the prior art, the heat storage device has the advantages that after sunlight is focused through the Fresnel lens, the heat storage copper pipes are adopted for heat storage, hot air collected in the heat storage copper pipes are blown by the fan to flow to a drying chamber, the continuous heat supply time can be prolonged by two hours or more, the heat energy utilization rate is high, and the drying efficiency can be greatly improved.

Description

Technical field [0001] The invention relates to a heat storage device for a dryer, belonging to the technical field of drying equipment. Background technique [0002] Solar drying is an effective method, which will play a positive role in developing rural economy, saving conventional energy, avoiding environmental pollution, improving product quality, changing outdated production and processing methods and making farmers rich. The drying method in daily life is mostly natural drying. The drying temperature is low, the drying time is long, and the drying conditions (such as sunlight intensity, wind speed, relative air humidity, etc.) cannot be controlled, and it is prone to poor drying effects and uneven drying, which are easily affected. The pollution and erosion of environmental factors make the drying effect unsatisfactory. The drying temperature required for general agricultural products is relatively low, about 40-55℃, which matches the low-temperature heat utilization in th...

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Problems solved by technology

[0003] At present, there are mainly two types of solar dryers: one is a common greenhouse-type solar drying device, and the other is a collector-type solar drying device. The air collector and drying chamber of this drying device are separated. , can be better combined with the conventional energy air heating system to form a large-scale hybrid solar drying device with continuous operation, but the drying heat transfer process is mainly convective heat transfer, and there is an additional heat exchange process between solar energy and materials , the drying efficiency is lower than that of ordinary greenhouse-type solar drying devices

However, the existing heat storage time is short. After the sun sets, the continuous drying time is greatly shortened, the temperature drops suddenly, the drying effect is poor, and the efficiency is also reduced.

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