Resumen
[0001] The present invention comprises: frame (8); and sealed heat transfer tubes (1) fixed to the frame (8), and with: external walls (4), in a longitudinal direction; wick (5) surrounded by the external walls (4), which defines a gap (13) in the heat transfer tube (1); and in liquid (2) and vapour (3) phase, which circulates in the gap (13), between an evaporation section (6), and a condensation section (7); the gap (13) being configured to conduct the vapour heat transfer fluid (3), from the evaporation section (6) to the condensation section (7), and the wick (5) comprising longitudinal channels (10, 11, 12) and pores, to conduct the condensed heat transfer fluid (3) by capillarity, between the condensation section (7) and the evaporation section (6). It improves heat dissipation efficiency.
Reivindicaciones
CLAIMS 1. A cooling structure comprising: - a frame (8); and - at least one sealed heat transfer tube (1), fixed to the frame (8), and configured for heat dissipation, in turn comprising: - external walls (4), which define a longitudinal direction; - a wick (5) housed and surrounded by the external walls (4), which is hollow and defines a gap (13) in the heat transfer tube (1) surrounded by the wick (5); and - a heat transfer fluid (2, 3) in two phases, liquid (2) and vapour (3); the heat transfer tube (1) being configured so that the gap (13) of the heat transfer tube (1) is configured to conduct the vapour heat transfer fluid (3) in a longitudinal direction, from an evaporation section (6) of the heat transfer tube (2), in which the liquid heat transfer fluid (2) evaporates by means of heat input, to a condensation section (7), also of the heat transfer tube (1), in which the heat transfer fluid (1) condenses, dissipating heat out of the cooling structure, and the wick (5) is configured to conduct the liquid heat transfer fluid (2) by capillarity in a longitudinal direction from the condensation section (7) to the evaporation section (6); the wick (5) comprising longitudinal channels (10, 11 , 12) and pores, the channels and pores configured to conduct the condensed heat transfer fluid (3) by capillarity, between the condensation section (7) and the evaporation section (6); the cooling structure being characterized in that the pores are part of a porous structure of the wick (5), with variable porosity, between 27.5% - 42.4%, in two directions, and with effective pore radius values comprised between 0.030 mm and 0.200 mm. 2. The cooling structure according to claim 1 , wherein the wick (5) has a roughness defined by: - Ra comprised between 19.2 pm and 97 pm; - Sa comprised between 28.7 pm and 117 pm; and - Wa comprised between 15.4 pm and 48.0 pm. 3. The cooling structure, according to any of claims 1-2, wherein the external walls (4) are made of a material selected from aluminium alloys, steel, titanium, as well as copper alloys. 4. The cooling structure, according to any of claims 1-3, wherein the heat transfer fluid (2, 3) is selected from alcohols, ammonia and a combination thereof. 5. The cooling structure, according to any of claims 1 -4, wherein the frame (8) and / or the wick (5) and / or the external walls (4), are made by metal additive manufacturing. 6. The cooling structure according to claim 5, wherein the frame (8) and / or the wick (5) and / or the external walls (4) are made by SLM (Selective Laser Melting).
