a housing, and the housing including a base, a cap connected with the base, and a cavity defined between the base and the cap, wherein the base is made of heat dissipation material, the base has a support sheet formed thereon, the support sheet has an internal face facing the cap, and the support sheet has an external face back to the cap, wherein the internal face of the support sheet has a circular post integrally extending from a center of the internal face, a wear resistant washer exposed outside the circular post of the internal face, wherein the external face of the base has a notch defined on the center of the external face and extending to the circular post, the cap has at least one inlet and at least one outlet which communicate with the cavity, and the base has a fence extending to the cap from a peripheral side of the base;

an impeller accommodated in the cavity and including multiple vanes extending to a side of the cap, wherein the impeller includes a receiving orifice defined on a center thereof and configured to accommodate the circular post, and the impeller back to a side of the cap rotatably contacts with the wear resistant washer; and

a reinforced heat conductor accommodated in the notch of the base, wherein the reinforced heat conductor includes a first segment and a second segment, the first segment extends into the circular post over the internal face of the base, and the second segment is exposed outside the external face of the base.