Electric heating system for a fluid line system

• US 8,965,187 B2
• Filed: 03/04/2010
• Issued: 02/24/2015
• Est. Priority Date: 03/20/2009
• Status: Active Grant

• Current Assignee: VOSS Automotive GmbH (Park-Ohio Holdings Corporation)
• Original Assignee: VOSS Automotive GmbH (Park-Ohio Holdings Corporation)
• Inventors: Borgmeier, Olav, Etscheid, Tobias, Mitterer, Reiner, Schler, Thomas
• Primary Examiner(s): PELHAM, JOSEPH MOORE
• Application Number:
  US13/257,804
• Publication Number:
  US 20120008927A1
• Time in Patent Office: 1,818 Days
• US Class Current: 392/480
• CPC Class Codes: F01N 2610/02 the substance being ammonia or urea
• CPC Class Codes: F01N 2610/10 the substance being heated, e.g. by heating tank or supply line of the added substance
• CPC Class Codes: F01N 2610/14 Arrangements for the supply of substances, e.g. conduits
• CPC Class Codes: F16L 25/01 specially adapted for realising electrical conduction between the two pipe ends of the joint or between parts thereof
• CPC Class Codes: F16L 53/38 using elongate electric heating elements, e.g. wires or ribbons
• CPC Class Codes: H01R 13/005 Electrical coupling combined with fluidic coupling
• CPC Class Codes: H05B 1/0244 Heating of fluids H05B1/0247 takes precedence
• CPC Class Codes: H05B 2203/021 Heaters specially adapted for heating liquids
• CPC Class Codes: H05B 3/46 heating conductor mounted on insulating base

Abstract

A heating system for a fluid pipe system in which at least one electric heating element (R_L) is assigned to at least one fluid line, said heating element, in order to apply a predetermined heating output to the fluid line, being provided with an electric operating voltage (U_B) that is reduced compared to the supply voltage (U).

Claims

1. A heating system for a fluid pipe system, the heating system comprising at least one electric heating element (R_L) assigned to at least one fluid line, said heating element being supplied with an electric operating voltage (U_B) in order to apply a specific heating output to the fluid line, wherein the operating voltage (U_B) is reduced compared to a supply voltage (U), the heating element (R_L) is comprised of a heating-coil material that runs helically around the fluid line, whereby at least one heating wire runs helically around a core filament of the heating-coil material.

2. A heating system according to claim 1, wherein a series resistor (R) is connected in series with and upstream of the heating element (R_L).

3. A heating system according to claim 1, wherein the heating element (R_L) is actuated via a switch that is controlled with constant pulse frequency.

4. A heating system according to claim 1, wherein the heating element (R_L) is actuated, in order to adjust or control its heating output, in a pulse-modulated synchronized manner, with a specific, variable duty cycle.

5. A heating system according to claim 4, wherein the heating element (R_L) assigned to the fluid line is electrically connected in series with at least one additional heating element (R_V1, R_V2), and which are each assigned to one line connector;

a controlling member controls at least a partial section of the available heating elements (R_L, R_V1, R_V2) singly, so that the controlling member adjusts or regulates their heating output.

6. A heating system according to claim 5, wherein the total heating output of the series connection of all of the heating elements (R_L, R_V1, R_V2) can be controlled by the controlling member by means of an electronic switch found in the series connection.

7. A heating system according to claim 5, wherein with a series connection of the heating element (R_L) to at least one heating element (R_V1, R_V2) of a line-connector that is connected to the fluid line, the line heating element (R_L) has a heating output per meter of line-length (L) that has a ratio of 10:

1 to the heating output of each of the connector heating elements ((R_V1, R_V2).