Energy-saving small hot air drier

Abstract

The invention provides an energy-saving small hot air drier. An outer box is provided with an inner cavity; a bottom draught fan is arranged at the bottom of the outer box; an electric heater and an air pipe connected with the bottom draught fan are oppositely arranged; an air pressing plate is located over the electric heater, and gaps are formed between at least one end of the air pressing plate and the two side walls of the outer box; a sealing plate is located on one side of the electric heater; two partition plates are provided with holes and arranged in a spaced mode, and a drying chamber is formed among the partition plates and the air pressing plate; a side-face draught fan is arranged on one side of the outer box, and an air outlet of the side-face draught fan and the drying chamber are oppositely arranged; an air exhaust outlet is formed in the top of the outer box and communicated with the inner cavity of the outer box; one end of a circulating air pipe is connected to the side wall, opposite to the side-face draught fan, of the outer box, and the other end of the circulating air pipe is connected with an air inlet of the side-face draught fan. The energy-saving small hot air drier is simple in overall structure, high in practicability, easy to use and popularize and good in drying effect.

Description

technical field [0001] The invention relates to a small drying device suitable for dehydration of food, fruits and vegetables, Chinese medicinal materials, etc. by means of heating and ventilation, especially a small hot air dryer requiring reduced drying time and energy consumption. Background technique [0002] At present, the widely used small hot air dryers generally adopt the ventilation scheme of one-way air supply and one-way exhaust air. Electric heaters are used to heat the incoming cold air, and the electric heaters are turned on or off by detecting the air temperature in the drying room. Adjust the temperature in the drying room. The air outlet is always open during the drying process. Therefore, a large amount of heat energy is lost with the hot air discharged during the drying process. On the one hand, it has been found through experiments that the hot air in the drying chamber does not have a high water content during most of the drying process, that is, the ...

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Problems solved by technology

[0003] In order to overcome the shortcoming of long drying time and high energy consumption of the existing small hot air dryer, the present invention provides an energy-saving small hot air dryer, which not only reduces the drying time compared with the traditional hot air dryer, but also realizes the drying process It also has the function of real-time monitoring and recording the temperature and humidity data of the dried material

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