Thermal capacitor
AssigneeFujitsu Limited
InventorAkihiro YASUO
Life of this patent
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Abstract
A thermal capacitor cools servers when an active cooling system fails. The thermal capacitor includes cold insulation passages, fans, temperature sensors, and a control unit. The cold insulation passages each have a plurality of air flow channels obtained by dividing the air flow path into a plurality of air flow paths with different air flow path cross-sectional areas. The fan is mounted in each air flow path and the fan controls the air flow of each air flow channel. A temperature sensor is mounted in each outlet of the cold insulation passages. When a detected temperature exceeds a predetermined temperature, the control unit controls air flow so that the ratio of air flow by air flow passage with larger air flow path diameter to overall air flow of all air flow channel increases.
Claims17
A cooling storage device mounted in an air flow path between a cooling apparatus and an entity subject to be cooled comprising:
- a passage comprised of a plurality of air flow paths with different air flow diameters obtained by separating said air flow paths into a plurality of air flow channels, the channels being made of material that is cooler than the temperature of air heated by the entity;
- a fan mounted to each air flow channels of said passage and controls air flow flowing into each air flow channels;
- a temperature sensor mounted an outlet side of said cold insulation passage;
- and
- a control unit controlling air flow so that the ratio of air flow through air flow channels with larger air flow path diameter to overall air flow of all of the air flow channels increases when a detected temperature by said temperature sensor exceeds a predetermined temperature.
A cooling storage device mounted in an air flow path between a cooling apparatus and an entity subject to be cooled includes:
- a passage formed by a plurality of air flow paths with different diameters of air flow paths obtained by separating said air flow channels, the channels being made of material that is cooler than the temperature of air heated by the entity;
- an air flow control unit mounted in each air channels of said passage, when air temperature at each air flow channel is low, an opening of air flow channel with larger diameter is controlled lager than that with smaller diameter, thereby changing air flow resistance of each air flow channels.
In cooling storage device mounted in an air flow path between a cooling apparatus and an entity subject to be cooled a cooling storage method dividing an air flow path in a cold insulation passage into a plurality of air flow channels with different air flow path diameters;
- when air temperature at said air flow channel exceeds a predetermined temperature, air flow is controlled so that the ratio of air flow of air flow paths with smaller air flow path diameter to overall airflow in all passages increases.
A cooling storage method using a cooling storage device mounted in an air flow path between a cooling apparatus and an entity subject to be cooled, comprising;
- dividing said air flow path into a plurality of air flow channels with different air flow path diameters;
- and at least for two levels of predetermined high and low temperatures:
- high and low, when air temperature at said air flow channels are lower, air flow resistance is changed by controlling of the air flow path with more larger air flow diameter channels and fewer smaller diameter channels.
A cooling storage method according to claim 17, wherein among said plurality of air flow channels, as the diameter of the air flow channels increases, smaller the thermal capacity is reduced.
A cooling storage method using a cooling storage device mounted in an air flow path between a cooling apparatus and an entity subject to be cooled comprising providing a plurality of thermally deformable parts that support cooling materials and are combined so that a larger space is formed between thermally deformable parts when the temperature is higher.
Dependencies are inferred from the claim text.