Project development, dryers, meat, pineapple glasses using heat pumps are intended to create a heat pump design. For drying meat, pineapple and dried glasses these performance machines. Pineapple used in experiments is a species of Pattawia. The cooked pie flavors are similar to sunglasses. With an average diameter of 10 cm thickness 1 cm with an average weight of 40 g per piece, which is arranged in 5 oven shelf 10 kg 2 kg total oven size 2.2 m high, 1.2 m long 1.5 m steel frame made in stainless steel, 1 mm thick covered with insulation and thick fiberglass 2.54 cm outside the wire with sang.The colors used. Use a heat pump size, 1 ton of cooling. Refrigerating substance is R-22 Li wokwop wa noi solutions using control flow rate of cooling onto the outside of the condenser. For excess cooling by temperature control before drying room. 0.5 HP motor driving a fan is used to blow through the hot coil size. Dried pineapple at test temperature, 0 C 45, where dried pineapple moisture wet start 74.6828 Wet-basis% humidity and dry standardized equals Dry-basi% humidity wet 294.98 standard after drying at 27.664% Wet-basis average average rate of condensation MER = 0.05 (kgwater/h). Average evaporation rate specific SMER = 0.22 (kgwater/kw-h), and the coefficients of heat pump COP somrarot! = 3.32 average. Economics analysis on the dryers minced meat, heat pump dash sunglasses by category. Heat pump 69860 machine price baht drying meat costs more dash sunglasses 321.75 baht/kg. 1.32 years payback period with investment yields 108.04% Keywords: glasses, pineapple, heat pump drying
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