An　experimental　study　on　the　structural　optimization　of　solar　air　compressor　is　conducted.　The　heating　and　cooling　characteristics　as　well　as　the　changes　of　solar　energy　utilization　rate　after　installing　a　disturbing　fan　in　the　compressed　air　tank　are　tested　and　analyzed.　The　experimental　results　show　that　in　the　range　of　speed　2.0-6.7　m/s,　there　exists　an　optimal　speed,　which　makes　the　solar　thermal　engine　have　the　highest　efficiency.　Its　cooling　coefficient　increases　from　0.34-0.44　to　0.78-0.84,　and　the　absorbent　capacity　of　the　compressor　after　cooling　also　increases　significantly.　According　to　the　nominal　solar　energy　utilization　rate,　compared　with　the　ribbed　heat-absorbing　tube　or　smooth　heat-absorbing　tube　without　blower,　the　combined　structure　of　blower　and　ribbed　heat-absorbing　tube　has　a　great　improvement.　The　improvement　range　is　between　10.8%　and　145.8%.　Besides,　the　heat　transfer　enhancement　effect　of　blower　is　obvious.　©　2022,　Solar　Energy　Periodical　Office　Co.,　Ltd.　All　right　reserved.