DEHYDRATION OF VEGETABLES 



13 



for circulation of the air. Two "Nichrome" coils, totalling 1650 watts, are used 

 for heating. These are mounted around the interior of the galvanized iron fan 

 housing as shown in the illustration. Simple baffles attached to the rear of the 

 tray holders, widest at the top and tapering to the bottom, are arranged to give 

 uniform air circulation through all the trays at around 300 linear feet per minute. 

 The tray holders are so constructed that the air passes through the trays rather 

 than over them. A simple thermostat is used for temperature controls, a "brood- 

 er" tj'pe thermostat with a range of 140°-160° F. serving quite satisfactorily. 

 Recirculation of the air and humidity are regulated by an adjustable exhaust 

 outlet. The most practical capacity for the unit as illustrated is 18-22 pounds;_of 

 fresh, prepared product. 



Figure 5a. Rear View of "Several Family" Deiiydrator, back panel removed to show baffles, 



position of air ducts and lieating units mounted in fan housing. Thermostat is shown 



n upper left of picture. 



