dc.description.abstract | The air nozzle used by food factories produce recorded 100dB of noise for employees. The law requires exposure to noises over 90dB to be under regulatory control in order to reduce noise exposure of the equipment. This study adopts air nozzle system noise reduction experiments, to undergo optimal combination and comparisons, for air nozzle systems that meet noise and cleaning capability standards. For the study′s enhancement of air nozzle systems, the first step is to decide on measuring method and equipment. The second step is to engage in measurement, analysis and comparison of the material, pipe diameter, pipe length of the extension tube and air nozzle noise level. The third step is to measure the noise and cleaning ability of air nozzles. The fourth step is optimal integration. The fifth step is before and after comparison of air nozzle noise and cleaning ability. The measurement laboratory test uses 4 different extension tubes: Polyurethane, Polyamide, Polyethylene and Polyvinyl Chloride. The air nozzles need to fulfill cleaning usage functions, with Silvent 920A, Plastic Air Nozzle model square air nozzles and Silven t701, Silvent 209 model circular air nozzles undergoing combination analysis. The noise exposure of the extension tube was 99~100dB proving hat its material has little effect on noise level. Using Polyurethane extension tube is more cost effective and is to be used for future research. All 4 silencing nozzles have achieved a noise level of below 90dB. The four silencing nozzles and three Polyurethane pipes have the diameter of 96mm, 65mm, 40mm, which undergoes optimal combination experiments. Results show that within the combination of extension tubes and air nozzles, the cleaning ability of Silven T7001 and Silvent 20 silencer nozzles do not meet requirement standards. Lastly, the extension tubes of 96mm and 65mm in diameter all meet the relevant standards, with the 65mm pipe diameter being the most cost effective. | en_US |