Miniature pump for liquid cooling system

A miniature pump for use with a liquid cooling system, comprising:

• a pump casing defining therein an enclosed space with an inlet and an outlet in communication with the enclosed space;
• a spacing plate arranged in the pump casing to divide the enclosed space into first and second chambers respectively communicating with the inlet and outlet;
• a liquid circulating unit received in the second chamber and comprising an impeller for circulating liquid in the liquid cooling system;
• and
• the spacing plate defining therein a through opening aligned with a center portion of the impeller for allowing the liquid in the first chamber to enter the second chamber.

A method for operating a liquid cooling system, comprising:

• providing a casing having an enclosed space for receiving cooling liquid of said liquid cooling system therein;
• providing an inlet and an outlet to said casing in communication with said enclosed space for said liquid to move into/out said casing;
• driving said liquid in said enclosed space to circulate through said inlet and outlet via an impeller;
• and
• guiding liquid flow moving into said casing from said inlet so as to have said liquid flow movable toward a predetermined portion of said impeller in order for lessening disturbance of said liquid flow on driving of said impeller.