Method and device for monitoring the service life of a filter
First Claim
1. A method of monitoring the service life of a filter (1) in a filter system equipped with a fan, for example in a heating and air conditioning system of a motor vehicle, comprising:
- measuring the instantaneous air speed (21) using a sensor (2, 20) downstream from the filter (1), comparing it to the reference air speed (R) from the unloaded filter (1), and transmitting it to a service computer or indicating it on a display, wherein the need to replace the filter is signaled when this value drops below a predetermined threshold or threshold range of the instantaneous air speed (21).
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Abstract
A method of monitoring the service life of a filter (1) in a filter system equipped with a fan, in particular a filter (1) in an air conditioning system of a motor vehicle, the instantaneous air speed (21) preferably being measured on each startup of the system using a sensor (2, 20) downstream from the filter (1), compared to the reference air speed (R) from the unloaded filter (1), and transmitted to a service computer and/or indicated on a display, and the need to replace the filter being signaled when this value falls below a predetermined threshold or threshold range of the instantaneous air flow rate (21).
25 Citations
17 Claims
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1. A method of monitoring the service life of a filter (1) in a filter system equipped with a fan, for example in a heating and air conditioning system of a motor vehicle, comprising:
- measuring the instantaneous air speed (21) using a sensor (2, 20) downstream from the filter (1), comparing it to the reference air speed (R) from the unloaded filter (1), and transmitting it to a service computer or indicating it on a display, wherein the need to replace the filter is signaled when this value drops below a predetermined threshold or threshold range of the instantaneous air speed (21).
- View Dependent Claims (2, 3, 4, 7, 9, 11, 13)
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5. A method of monitoring the service life of a filter (1) in a filter system equipped with a fan, for example in an air conditioning system of a motor vehicle, comprising:
- measuring the difference in the instantaneous air speed (21) using a sensor (2, 20) downstream from the filter (1), comparing this difference to a reference air speed (R) from the unloaded filter (1), and transmitting it to a service computer or indicating it on a display, wherein the need to replace the filter is signaled when this value drops below a predetermined difference from a threshold or threshold range.
- View Dependent Claims (6, 8, 10, 12, 14)
- 15. A device for monitoring the service life of a filter (1), for example in an air conditioning system of a motor vehicle equipped with a fan, comprising a sensor (2, 20) situated downstream from the filter (1), which measures the air speed of the air flow led through the filter (1), and transmits a drop in the air speed to a service computer or to a display as a function of the load state of the filter (1).
Specification