Liquid cooling device

Abstract

A liquid cooling device is mounted in a large-sized overhead projector to absorb heat generated by a light-generating device. The liquid cooling device has a water tank, a heat sink, a liquid block assembly and a pump. The water tank has an outlet hole formed on the middle of the water. The heat sink communicates with the water tank. The liquid block assembly contacts the light-generating device and is filled with a coolant and communicates with the heat sink via an inlet duct. The pump is mounted in the large-sized overhead projector and is in fluid communications with the water tank via an outlet duct mounted in the outlet hole of the water tank. Therefore, when the large-sized overhead projector is put upright or turned upside down, the outlet hole is always in the middle of the water tank, preventing the pump from idling and being damaged as the amount of coolant is reduced.

1 . A liquid cooling device mounted in a large-sized overhead projector to absorb heat generated by a light-generating device, and comprising:
 a water tank being hollow comprising
 a middle; 
 a side surface; 
 an outlet hole formed on the middle of the water tank; 
   a heat sink connected to the side surface of the water tank;   a liquid block assembly adapted for contacting the light-generating device and connected with the heat sink via an inlet duct; and   a pump being in fluid communications with the water tank via an outlet duct that is connected to the outlet hole of the water tank, and the pump connected with the liquid block assembly via a pipe.   
     
     
         2 . The liquid cooling device as claimed in  claim 1 , wherein the liquid block assembly comprises:
 multiple liquid blocks connected with each other via a tubing, each of the liquid blocks having a surface for contacting the light-generating device, and the inlet duct connecting one of the liquid blocks with the heat sink, and the pipe connecting the other liquid block with the pump.