Patent · US Active

Heat exchanger and method for its manufacture

US9841244B2 · kind B2 · utility

2Cited by

20References

16Claims

0Family size

Assignee

Alfred Kärcher GmbH & Co. KG · DE

Inventors

Michael Boehm · Waukesha, US
Stefan Ehrhardt · Winnenden, DE
Siegmar Munz · Vellberg, DE

Key dates

Filing date	Nov 5, 2013
Grant date	Dec 12, 2017
Priority date	—
Expiry date	Feb 4, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/4935
WIPO fieldThermal processes and apparatus
WIPO sectorMechanical engineering

Abstract

A heat exchanger for heating a liquid is provided, in particular, for high-pressure cleaners, including an inner and an outer heating coil which each have a plurality of turns, and including spacers which are arranged between the inner heating coil and the outer heating coil and are distributed over the circumference of the inner heating coil. To develop the heat exchanger in such a way that it can be manufactured more cost-effectively and is highly efficient, at least one turn of the outer heating coil includes between two spacers immediately adjacent to each other a first turn section in which the radial spacing from the inner heating coil is smaller or larger than in the region of the spacers. Two methods for manufacturing such a heat exchanger are also provided.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.