Heating Insert
OwnerJurgen Stritzinger, Oleg Kexel +3inventors
InventorsJurgen Stritzinger, Oleg Kexel, Roland Starck, Armin Lang, Ingo Ragaller
Life of this patent
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Abstract
The invention relates to a heating element for thawing a fluid comprising at least one heating element, which is arranged in a housing (20), an intake pipe (21) made of plastic, which is fastened to the housing (20) for dipping into the fluid, at least one electrical connecting line (22, 23), which emanates from the housing (20) and which runs along the intake pipe (21). Provision is made according to the invention for the intake pipe (21) to support the at least one connecting line (22, 23).
Claims21
A heating insert for thawing a fluid comprising at least one heating element, which is arranged in a housing (20),
- an intake pipe (21) made of plastic, which is fastened to the housing (20), for dipping into the fluid,
- at least one electrical connecting line (22, 23), which emanates from the housing (20) and which runs along the intake pipe (21),
- characterized in that the intake pipe (21) supports the at least one connecting line (22, 23).
The heating insert according to any one of the preceding claims, characterized in that the intake pipe (21) includes a duct (27, 28) for supplying the fluid and a further duct (31), in which the at least one connecting line (22) is arranged.
The heating insert according to any one of the preceding claims, characterized in that the at least one connecting line (22, 23) is arranged on a jacket surface of the intake pipe (21).
The heating insert according to any one of the preceding claims, characterized in that the intake pipe (21) is surrounded by a plastic sleeve (24).
The heating insert according to any one of the preceding claims, characterized in that the at least one connecting line (22, 23) is a strand.
The heating insert according to any one of the preceding claims, characterized in that the at least one connecting line (22, 23) is made of a heating resistance material, preferably of a stainless steel.
The heating insert according to any one of the preceding claims, characterized in that the at least one connecting line (22, 23) has an electrical resistance of 0.3 Ω per meter to 2.5 Ω per meter.
The heating insert according to any one of the preceding claims, characterized in that the at least one connecting line (22, 23) is surrounded by a plastic jacket.
The heating insert according to any one of the preceding claims, characterized in that the housing (20) is a metal housing comprising a plastic jacket.
The heating insert according to any one of the preceding claims, characterized in that the housing (20) is sealed against the penetration of fluid by means of a seal (29), which surrounds the at least one connecting line (22, 23), wherein the seal (29) is a formed plastic part, which is slid onto the connecting line (22, 23).
The heating insert according to any one of the preceding claims, characterized in that the at least one connecting line (22, 23) runs free of twists in longitudinal direction of the intake pipe (21).
A urea supply system for an exhaust gas cleaning catalyst (1) of an internal combustion engine, in particular of a motor vehicle, comprising
- a urea tank (3) for accommodating a urea solution,
- a heating insert (8) according to any one of the preceding claims for thawing a frozen urea solution,
- a connecting line (6, 11), which connects the intake pipe (21) of the heating insert (8) to the exhaust gas cleaning catalyst (1),
- a pump (5) for pumping urea solution through the interconnection (6, 11) from the urea tank (3) to the catalyst (1) and
- a return line (4), which branches of from the interconnection (22, 23) and which leads to the urea tank (3), characterized in that
- the return line (4) is embodied and arranged in such a manner that urea solution escaping from the return line (4) during operation runs down the intake pipe (21).
Dependencies are inferred from the claim text.