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Unit for varying a temperature of a test piece and testing instrument incorporating same

  • US 7,115,838 B2
  • Filed: 07/07/2004
  • Issued: 10/03/2006
  • Est. Priority Date: 07/23/2003
  • Status: Active Grant
First Claim
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1. A unit for varying a temperature of a test piece by controlling a temperature of a control face comprising:

  • a hollow plate having a cavity formed therein, an inner surface defining the cavity, and an outer surface;

    a piping for supplying a coolant therethrough; and

    a heater thermally in contact with the plate;

    wherein the outer surface has a portion acting as the control face, andwherein the piping is combined with the plate so as to have at least one outlet in the cavity,so that the coolant is jetted toward a target area within the cavity so as to control temperature of the control face by means of the heater and the coolant,wherein the coolant is a refrigerant that is in gas phase at normal temperature and in liquid phase or in gas-liquid mixture phase when it is supplied toward the target area.

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