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Valve unit and reaction apparatus having the same

  • US 8,499,793 B2
  • Filed: 12/27/2010
  • Issued: 08/06/2013
  • Est. Priority Date: 04/04/2006
  • Status: Active Grant
First Claim
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1. A valve unit comprising:

  • a substrate;

    a channel formed in the substrate defining a path through which a fluid flows;

    a plug formed in the channel to block the path of the fluid in the channel when the plug is in a solid state at a room temperature, the plug including a phase change material and a plurality of heat-dissipating particles dispersed in the phase change material;

    a phase change material chamber formed along the channel adjacent to the plug; and

    an external energy source which irradiates the plug with electromagnetic energy,wherein, when the plug is irradiated with the electromagnetic energy, the plurality of fine heat-dissipating particles dissipate heat and the phase change material become molten, and flows to the phase change material chamber thereby opening the path to allow the fluid to flow, and wherein the heat-dissipating particles are dispersed in a hydrophobic carrier oil.

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