Heat pump fruit and vegetable dryers can be used to dry a variety of fruits and vegetables, including watermelon. Generally speaking, the temperature setting range of the heat pump fruit and vegetable dryer is about 30°C~80°C, and the specific setting temperature needs to be determined according to the type and size of the drying items.

For watermelons, it is recommended to slice or cube them to speed up the drying process. During the drying process, it is recommended to set the temperature at around 50°C~60°C. Too high a temperature can cause the watermelon to lose water too quickly, and possibly destroy some of its nutrients. At the same time, the drying time also needs to be adjusted according to the actual situation, which usually takes several hours to a day or so.

It should be noted that during the drying process of using the heat pump fruit and vegetable dryer, good ventilation should be maintained to avoid heat accumulation and moisture retention. The watermelon should also be checked and stirred regularly during drying to ensure it is evenly heated and to avoid over drying.