Filter element analysis system and associated methods

Patent metadata

Field	Value
Publication number	US-12102953-B2
Application number	US-202117557464-A
Country	US
Kind code	B2
Filing date	Dec 21, 2021
Priority date	Nov 29, 2018
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

A filter media analysis system which utilizes particulate buildup to close notches or breaks provided along a passive circuit, wherein closure of the notches results in an activation of the circuit and transmission at a particular frequency which activation and transmission can be correlated to a life cycle point of the filter media.

First claim

The invention claimed is:

1. A filter element monitoring system comprising:
a filter media;
a passive circuit provided on the filter media;
the passive circuit having a notch in the form of at least one gap or break provided in the circuitry thereof, the notch being configured to provide a first state of the passive circuit in a clean state of the filter media;

wherein a stream of a fluid is configured to be directed through the filter media,
wherein the filter media is configured to remove particulates from the stream;
wherein the filter media is pleated and the passive circuit is located in a pleat of the filter media;
wherein the filter media is configured to collect a buildup of particulates until a contaminated state occurs in which at least one pleat of the filter media is deformed by the buildup or has reached a particular load of particulates,
wherein in the contaminated state of the filter media the circuitry is configured to provide a second state of the passive circuit;
wherein the buildup of particulates on the filter media causes an increase in pressure on the filter media of a filter element,
wherein the increase in pressure causes the deformation,
wherein the passive circuit comprises
a first side having an open circuit with the notch and
a second side having a conductive material with a pleat fold between the first side and the second side, and

wherein the deformation of the at least one pleat causes the first side to contact with the second side and the conductive material closes the open circuit.

2. The filter element monitoring system, according to claim 1 , the system comprising:
a transmitter and a receiver;
the transmitter being configured to emit a signal thus providing power to the passive circuit, and
the receiver being configured to receive information from the passive circuit.

3. The filter element monitoring system of claim 2 , wherein
the passive circuit is provided on a substrate or carrier, and
wherein the notch extends both through a material of the passive circuit and through the substrate or carrier.

4. The filter element monitoring system of claim 2 , wherein
the first state of the passive circuit is an open state in which the receiver receives no signal from the passive circuit.

5. The filter element monitoring system of claim 2 , wherein
the first state of the passive circuit provides a first signal at a first frequency; and
the second state of the passive circuit provides a second signal at a second frequency,
wherein the first frequency is different from the second frequency.

6. The filter element monitoring system of claim 5 , wherein
the second signal indicates that the filter media of the filter element has reached its capacity for holding particulates indicating that the filter element should be replaced.

7. The filter element monitoring system of claim 2 , wherein
a plurality of passive circuits are provided on various locations of the filter media of the filter element,
wherein the passive circuits each have incrementally larger notches or gaps.

8. The filter element monitoring system of claim 2 , wherein
the notch is configured to collect the buildup of particulates until a bridge forms over the notch in the contaminated state.

9. The filter element monitoring system of claim 8 , wherein
an amount of particles that forms the bridge causes a change of a frequency of a first signal,
wherein the frequency of the first signal corresponds to a percentage of a maximum load of the filter media of the filter element or a life cycle of the filter element.

10. The filter element monitoring system of claim 2 , wherein
the passive circuit is a RFID tag.

11. A method of monitoring a filter element, the method comprising the steps of:
providing a filter element monitoring system comprising:
a filter media,
a passive circuit provided on the filter media,
the passive circuit having a notch in the form of at least one gap or break provided in the circuitry thereof, the notch being configured to provide a first state of the passive circuit in a clean state of the filter media,

wherein a stream of a fluid is configured to be directed through the filter media,
wherein the filter media is configured to remove particulates from the stream,
wherein the filter media is pleated and the passive circuit is located in a pleat of the filter media;
wherein the filter media is configured to collect a buildup of particulates until a contaminated state occurs in which at least one pleat of the filter media is deformed by the buildup or has reached a particular load of particulates,
wherein in the contaminated state of the filter media the circuitry is configured to provide a second state of the passive circuit,
wherein the buildup of particulates on the filter media causes an increase in pressure on the filter media of the filter element,
wherein the increase in pressure causes the deformation,
wherein the passive circuit comprises
a first side having an open circuit with the notch; and
a second side having a conductive material with a fold between the first side and the second side,
wherein the deformation of the at least one pleat causes the first side to contact with the second side and the conductive material closes the open circuit;

connecting a controller to a transmitter and a receiver; and
providing a signal to a user or operator when the passive circuit begins responding to a signal emitted by the transmitter when the open circuit is closed.

12. The method of monitoring a filter element of claim 11 , further comprising:
measuring a frequency response of the passive circuit in response to the transmitter signal; and
correlating a plurality of frequencies to respective states of the filter media.

Assignees

• Mann & Hummel Gmbh

Inventors

• Amirnasr Elham
• Scope Andreas
• Heinzmann Matthias

Classifications

• B01D46/442

  by measuring the concentration of particles · CPC title

• B01D46/429

  Means for wireless communication · CPC title

• B01D46/009

  Identification of filter type or position thereof, e.g. by transponders or bar codes · CPC title

• B01D46/0086 Primary

  Filter condition indicators · CPC title

• B01D46/521 Primary

  using folded, pleated material · CPC title