Energy-saving type garden staff heat pump drying device

Abstract

The invention discloses an energy-saving type garden staff heat pump drying device. The energy-saving type garden staff heat pump drying device is composed of a compressor, a first evaporator, a first electromagnetic stop valve, a second electromagnetic stop valve, a second evaporator, heat pipes, a water pan, a return fan, a partition plate, a drying box, a garden staff rack, a temperature and humidity sensor, an air feeder, a first condenser, a third electromagnetic stop valve, a fourth electromagnetic stop valve, a second condenser, a throttling valve and a controller. The energy-saving type garden staff heat pump drying device has the advantages that heat can be absorbed from the environment in the drying starting stage, inlet air sensible heat of the evaporators in the drying box is directly used for heating circulating air, and excessive heat in the drying box in the drying later stage can be discharged out of the drying box; starting heating is quick, the temperature is controllable, the heat efficiency is high, the drying quality is good, and environmental friendliness and sanitation are achieved.

Description

technical field [0001] The invention relates to a fruit and vegetable drying system, in particular to an energy-saving heat pump drying device for fruits and vegetables, which belongs to the technical field of fruit and vegetable drying. Background technique [0002] Fruits and vegetables account for a large proportion of my country's agricultural products. Since the moisture content of fruits and vegetables is as high as 70% to 90%, they are prone to rot and deterioration during storage, resulting in serious loss of fruits and vegetables. According to reports, the rot loss rate of harvested fruits and vegetables in my country reaches 30% for fruits and 40% for vegetables. Therefore, in order to reduce the loss of fruits and vegetables and prolong the shelf life of fruits and vegetables, the method of drying and dehydration is often used to process fruits and vegetables. At present, most of the fruits and vegetables in my country still use the traditional natural drying met...

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Problems solved by technology

However, most of the existing heat pump drying systems are equipped with an evaporator and a condenser. In the early stage of drying, only the heat converted by the compressor is used to heat the material, and the heating stage of the system takes a long time; When the temperature inside the oven is higher than the set temperature, it is difficult to discharge the heat in the oven, resulting in too high drying temperature and affecting the drying quality of fruits and vegetables; in addition, the evaporator cooling and dehumidification process of the heat pump drying system needs to cool down the circulating air before heating it up. Unreasonable use of energy

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