Laminated paddle heater and brazing process

A laminated heater, comprising:

• a first metallic layer having an outer surface and an inner surface, said inner surface of said first metallic layer having a first heater groove;
• a second metallic layer having an outer surface and an inner surface, said outer surface of said second metallic layer having a cooling grove;
• said inner surface of said first metallic layer attached to said inner surface of said second metallic layer, such that said first heater groove defines a heater channel;
• a heater element located within said heater channel and attached to said first heater groove;
• a third metallic layer having an inner surface and an outer surface;
• said outer surface of said second metallic layer attached to said inner surface of said third metallic layer, such that said cooling groove defines a cooling channel;
• and
• a cooling element located within said cooling channel and attached to said cooling groove.

A laminated heater, comprising:

• a first aluminum layer having an outer surface and an inner surface, said inner surface of said first aluminum layer having a first groove;
• a second aluminum layer having an outer surface and an inner surface, said inner surface of said second aluminum layer having a cooling groove;
• said inner surface of said first aluminum layer brazedly attached to said inner surface of said second aluminum layer, such that said first groove defines a first heater channel, and such that said cooling groove defines a cooling channel;
• a first heat exchange element having an outer nickel plated sheath located within said first heater channel and brazedly attached to said first groove;
• and
• a cooling element located within said cooling channel and brazedly attached to said cooling groove.

A laminated heater, comprising:

• a first heat exchange element having an outer nickel plated sheath, said outer nickel plated sheath having a defined thickness;
• a first aluminum layer having a periphery, an outer surface and an inner surface, said inner surface of said first layer having a first groove, said first groove having a depth approximately equal to said defined thickness of said outer nickel plated sheath of the first heat exchange element;
• a second aluminum layer having a periphery, an outer surface and an inner surface;
• and
• a brazed homogeneous aluminum bond between said inner surface of said first aluminum layer and said inner surface of said second aluminum layer, such that said first groove defines a first heater channel, wherein said brazed homogeneous aluminum bond is located between said first heater channel and said periphery of said first aluminum layer and said periphery of said second aluminum layer;
• and wherein
• said first heat exchange element is located within said first heater channel and is brazedly attached to said first groove.

A laminated paddle heater, comprising:

• a first aluminum layer having an outer surface and an inner surface, said inner surface of said first aluminum layer having a first groove, said outer surface of said first aluminum layer having a second groove;
• a second aluminum layer having an outer surface and an inner surface;
• said inner surface of said first aluminum layer brazedly attached to said inner surface of said second aluminum layer, such that said first groove defines a first channel;
• a first heat exchange element having an outer nickel plated sheath located within said first channel and brazedly attached to said first groove;
• a third layer having an inner surface and an outer surface;
• said outer surface of said first aluminum layer brazedly attached to said inner surface of said third layer, such that said second groove defines a second channel;
• and
• a second heat exchange element having an outer nickel plated sheath located within said second channel and brazedly attached to said second groove.