As shown in FIGS. 6 to 9, a CPU liquid cooling system according to another embodiment of the present invention is showed. In some embodiments, the sleeve 3 is fully inserted into the housing 2, which is different from the embodiments described above. Besides, the length of the housing 2 is substantially same as the width of the heat exchanger radiator 1.

As shown in FIGS. 11 and 12, the present embodiment differs from the foregoing embodiments in that the housing 2 is constructed as a separate component, and the housing 2 is in fluid communication with the heat exchanger radiator 1 through a connection tube 7. That is to say, the housing 2 is not directly coupled to or integrally formed with the heat radiator 1. It can be seen from FIGS. 11 and 12 that only the arrangement of housing 2 is different from the foregoing embodiments. Certainly, the shape of the housing 2 can be changed, as long as a certain accommodating space is provided inside it. The shrinking bag 4 is provided in the same manner as the forgoing embodiments, so it will not be described in detail herein.