Heat pump type fruit and vegetable drying machine

Abstract

The invention relates to a heat pump type fruit and vegetable drying machine. The heat pump type fruit and vegetable drying machine comprises a drying box, an internal partition board, a circulating fan, fruit and vegetable plate shelves, a compressor, a condenser, a first evaporator, a second evaporator, a throttling valve, a first electromagnetic stop valve, a second electromagnetic stop valve and a water pan. The drying box is divided into an air processing chamber and a drying chamber by the internal partition board. The circulating fan is mounted at the upper portion in the drying box. The compressor, the condenser, the throttling valve, the first electromagnetic stop valve and the first evaporator are connected in an end-to-end mode to form a circulating loop. The pipeline from the throttling valve to the first electromagnetic stop valve is outwards connected with the second electromagnetic stop valve and the second evaporator in sequence. An outlet of the second evaporator is connected with the pipeline from the first electromagnetic stop valve to the compressor. The condenser is mounted above the air processing chamber in the drying box. The second evaporator is mounted below the air processing chamber in the drying box. The first evaporator and the compressor are mounted outside the drying box. The heat pump type fruit and vegetable drying machine has the advantages of being capable of saving energy and keeping the original quality of fruits and vegetables, and being free of secondary pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of fruit and vegetable drying, in particular to a heat pump type fruit and vegetable drying machine. Background technique [0002] my country is a large agricultural country, and the output of fruits and vegetables is the second largest agricultural industry after grain, and the annual output of fruits and vegetables ranks first in the world. However, compared with developed countries such as Europe and the United States, my country's post-harvest preservation technology for fruits and vegetables is seriously lagging behind. A complete and independent post-harvest cold chain for fruits and vegetables has not yet been formed. According to the statistics of the Food and Agriculture Organization of the United Nations (FAO), the direct economic loss caused by the postharvest loss of fruits and vegetables in my country is as high as 80 billion yuan every year, seriously affecting the national economy. [0003] To...

AI Technical Summary

Problems solved by technology

Most of the existing fruit and vegetable drying adopts the natural drying method, which has problems such as long processing time, low production efficiency, large occupied area, and secondary pollution caused by drying.

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