Patent · US Expired

Air dehumidifier for oil-insulated transformers, choke coils and steps switches

US7563310B2 · kind B2 · utility

0Cited by

4References

10Claims

0Family size

Assignee

MASCHINENFABRIK REINHAUSEN GMBH · DE

Inventors

Manfred Eichert · Deuerling, DE
Kurt Kugler · Lappersdorf, DE
Karsten Viereck · Teisendorf, DE
Rainer Brill · Nidda, DE

Key dates

Filing date	Apr 1, 2004
Grant date	Jul 21, 2009
Priority date	—
Expiry date	Aug 29, 2025

Classification

Technology area (CPC H)Electricity
CPC primaryH01F27/14
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A dehumidifier for an electrical-equipment air intake has an outer housing wall and a floor of a material with a high specific thermal conductivity downwardly closing the outer housing wall, having a downwardly tapering funnel-shaped inner surface formed with a central downwardly open port, and having a rounded edge where the surface meets the port. An inner air-permeable housing inside the outer housing wall holds a moisture-absorbing mass so that air drawn in through the port can pass through the mass and then into a space between the inner and outer housings. A moisture sensor is provided between the housings and a heater in the mass. A controller connected between the heater and the sensor energizes the heater and cooks moisture out of the mass such that the moisture condenses on the floor and runs over the edge out through the port.

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