HEAT MEDIUM HEATING DEVICE, METHOD OF MANUFACTURING SAME, AND VEHICLE AIR CONDITIONING DEVICE USING SAME
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United States of America Patent
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Issued Date -
Mar 10, 2016
app pub date -
May 8, 2014
filing date -
May 15, 2013
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Abstract
The heat medium heating device is provided with the following: a plurality of flat heat exchange tubes in which U-turn flow channels are formed; a heat medium inlet and outlet header to which heat medium inlet and outlet pipes are connected, and to which one end of each of the flat heat exchange tubes is connected at predetermined intervals and is jointed by brazing; and a plurality of sets of PTC heaters stacked between the flat heat exchange tubes. A heat exchange element comprising the flat heat exchange tubes, the heat medium inlet and outlet header, and the PTC heaters is sandwiched between a holding plate or a bottom face of a housing and a substrate mount, and is accommodated and installed within the housing in a state where the flat heat exchange tubes and the PTC heaters are in close contact.
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