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Electrical heating device

  • US 9,693,394 B2
  • Filed: 05/09/2016
  • Issued: 06/27/2017
  • Est. Priority Date: 05/11/2015
  • Status: Active Grant
First Claim
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1. An electrical heating device for heating the interior of a vehicle, comprising:

  • a plurality of PTC heating rods each comprising ceramic PTC heating resistors;

    an NTC heating rod comprising at least one NTC resistor;

    a holder that holds the PTC heating rods and the NTC heating rod; and

    heat sinks for transferring heat from the PTC heating rods to an air flow;

    wherein the PTC heating rods are connected in series to the NTC heating rod; and

    wherein the PTC heating rods are connected in parallel to each other.

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