Combination thermal module and wick structure thereof

A combination thermal module comprising:

• a vapor chamber internally defining an airtight chamber filled with a working fluid;
• an inner side surface of the vapor chamber located corresponding to a lower wall of the airtight chamber being provided with a first wick structure;
• and the vapor chamber being provided on one side with at least one through hole, which is communicable with the airtight chamber;
• at least one annular wick structure being provided in the airtight chamber at a position corresponding to the through hole;
• the annular wick structure having two opposing end surfaces, one of which is an upper end surface and the other is a lower end surface, and being provided with an axial passage and at least one radial passage;
• the axial passage axially extending through the annular wick structure from the upper to the lower end surface, such that the upper and the lower end surfaces are communicable with each other;
• and the radial passage radially extending through the annular wick structure from the axial passage to an outer peripheral surface of the annular wick structure, such that the axial and the radial passages are communicable with each other;
• and
• at least one heat pipe internally defining a heat pipe chamber extended between a closed end and an open end of the heat pipe;
• the open end of the heat pipe being correspondingly inserted into the through hole to enter the airtight chamber of the vapor chamber and be directly pressed against and supported on the upper end surface of the annular wick structure;
• and wherein the annular wick structure axially props, locates and supports the open end of the heat pipe inserted into the airtight chamber, enabling the combined heat pipe and vapor chamber to have an enhanced overall structural strength, guiding the working fluid condensed in the heat pipe to flow back to the first wick structure, and accordingly, shortening the path and time for the working fluid to flow from the heat pipe back to the vapor chamber and upgrading the two-phase heat exchange efficiency of the vapor chamber.