We　demonstrate　that　the　three-terminal　quantum　dot　nano-device　consisting　of　two　capacitively　coupled　quantum　dots　connected　to　electron　reservoirs　in　the　Coulomb-blockade　regime,　can　act　as　a　refrigerator　working　in　two　different　configurations.　We　analyze　the　transport　properties　of　steady-state　charge　current　and　heat　flow　in　the　three-terminal　quantum　dot　system　and　analytically　determine　the　working　mode　and　range　of　the　refrigerator　in　two　different　configurations.　Furthermore,　the　advantages　and　disadvantages　of　the　refrigerator　in　two　different　configurations　are　expounded　through　their　performance　evaluations　and　comparisons.　©　2019　Elsevier　B.V.