Browse Prior Art Database

Filter element with integrated permeability sensor

IP.com Disclosure Number: IPCOM000249411D
Publication Date: 2017-Feb-24
Document File: 2 page(s) / 214K

Publishing Venue

The IP.com Prior Art Database

Abstract

It is desirable to monitor an air filters status to determine if it is desirable to change the filter. Current technology mostly uses complicated and expensive air quality sensors to identify the filter's performance status. This invention is a sensor integrated in an air filter element for monitoring the physical status of the filter element, i.e. the loading or pressure drop created, by measuring the filter media parameter change over time. Media permeability is one of the physical parameters that changes over time of filter usage. The sensor is a combination of two capacitors connected to passive RFIDs, printed on the media or located on the element, and a metallic connector in a thin film form, fixed from one end to one of the capacitors connected to RFIDs.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 53% of the total text.

1

Title

Filter element with integrated permeability sensor

Known prior art

Currently industry uses active sensors that needs a power source in order to detect filter medium permeability. Also the existing technology is being sold separately in form of additional component to a filter that is not part of the filter element. Current technology mostly uses complicated and expensive air quality sensors to identify the filter’s performance status

Description of the invention

This invention is a sensor integrated in an air filter element for monitoring the physical status of the filter element, i.e. the loading or pressure drop created, by measuring the filter media parameter change over time. Media permeability is one of the physical parameters that changes over time of filter usage. The sensor is a combination of two capacitors connected to passive RFIDs, printed on the media or located on the element, and a metallic connector in a thin film form, fixed from one end to one of the capacitors connected to RFIDs.

The metallic film connects the two capacitors connected to passive RFIDs together when no air flow through media/element is present. When air is flowing through the media/element the metallic connector lifts up from the free side and there will be no connection between two capacitors. In this case a signal can be sent to the receiver that the air permeability of the element is within the acceptable range.

If the metallic connector is set still on the two capacitors or is lifted but not far from the capacitor (the distance can be measured by passive capacitance meter), it means that either there is no flow through the media/element or the flow is not strong enough to lift the metallic connector. If air is not moving optimally, the user is alerted to the fact that either the source of air flow is off or the filter is clogged/fu...