To　investigate　operating　characteristics　of　the　pump-driven　two　phase　loop　integrated　with　the　refrigerating　system,　especially　the　heat　exchanging　performance　changing　with　pump　frequency　and　temperature　difference　between　indoor　and　outdoor,　an　experimental　setup　of　the　integrated　refrigerating　system　was　established.　In　this　setup,　a　2.63　kW　compressor　and　a　3.75　kW　compressor　were　used　in　the　vapor　compression　refrigerating　system,　respectively.　And　an　inverter　pump　was　used　in　the　pump-driven　loop.　Results　show　that　the　heat　exchanging　performance　of　the　integrated　system　increases　when　the　pump　frequency　is　below　35　Hz,　and　then　decreases　with　the　frequency　at　the　indoor　temperature　of　25℃　and　the　outdoor　temperature　of　10℃,　while　the　energy　efficiency　ratio　changes　slightly　with　the　frequency　in　the　beginning　and　afterwards　decreases　gradually.　When　the　outdoor　temperature　varying　from　0℃　to　30℃,　the　variation　tendency　of　the　performance　for　the　integrating　system　was　investigated　and　the　optimum　outdoor　temperature　for　switching　the　operating　modes　was　obtained.　©　2017,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.