Device and method for thermally treating workpieces in...

H - Electricity – 05 – K

Patent

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Details

H05K 3/22 (2006.01) B23K 1/008 (2006.01) H05K 13/00 (2006.01)

Patent

CA 2722338

The present invention relates to a device for thermally treating workpieces, in particular printed circuit boards or the like that are equipped with electrical and electronic components, comprising at least one process chamber in which at least one heating or cooling zone is formed or disposed, wherein a temperature-controlled gaseous fluid can be introduced into said heating or cooling zone, wherein the workpieces pass through the heating or cooling zone and heat is transferred particularly in a convective manner between the workpieces and the temperature-controlled fluid, and comprising at least one temperature measuring element disposed in the process chamber, wherein at least one sensor element that has a defined mass is disposed in the process chamber, such that heat is convectively transferred between the sensor element and the fluid, and an apparatus is provided for cooling and/or heating the sensor element, wherein the temperature of the sensor element can be measured by the temperature measuring element.

La présente invention concerne un dispositif de traitement thermique de pièces à usiner, en particulier de cartes de circuits imprimés pourvues de composants électriques et électroniques ou d'éléments similaires, comportant au moins une chambre de traitement dans laquelle est prévue, c'est-à-dire agencée, au moins une zone de chauffage ou de refroidissement dans laquelle peut être introduit un liquide gazéiforme tempéré, les pièces à usiner traversant la zone de chauffage ou de refroidissement et un transfert thermique notamment par convection intervenant entre les pièces à usiner et le liquide tempéré. Le dispositif selon l'invention comporte de plus au moins un élément de mesure de la température, disposé dans la chambre de traitement, au moins un élément de détection d'une masse définie étant disposé dans la chambre de traitement de façon à entraîner un transfert thermique par convection entre l'élément de détection et le liquide, et un dispositif, permettant de refroidir et/ou de chauffer l'élément de détection. La température de l'élément de détection peut être mesurée par l'élément de mesure de la température.

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