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High heat dissipation PTC heater structure

  • US 5,028,763 A
  • Filed: 07/11/1989
  • Issued: 07/02/1991
  • Est. Priority Date: 07/11/1989
  • Status: Expired due to Fees
First Claim
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1. A PTC heater comprising a pair of square heat radiating plates each provided with a plurality of square openings and square foraminous areas regularly arranged such that each opening is surrounded on at least two sides by adjacent foraminous areas, a plurality of square perforated PTC thermistor elements corresponding in number to the number of said openings, said square plates being made of good heat and electric conductivity material and being insulated from one another, said plates being disposed in face-to-face relationship with one another, means securing said plates in position with said thermistor elements clamped between said plates with said elements being in electrical contact with the plates, the openings and the foraminous areas of the two plates being in alignment with each other, the openings and foraminous areas being located alternately in vertical and horizontal rows, said PTC thermistor elements being disposed between said plates with each element being aligned with respective ones of the openings so that air flow through the openings can flow through the perforated PTC thermistor elements, such that heat is conducted from said thermistor elements directly to air flowing therethrough and also is conducted to each of said foraminous areas for further conducting heat to air flowing through said foraminous areas thereby effectively radiating heat from said PTC thermistor elements to surrounding air.

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