Liquid purification or separation – With alarm – indicator – register – recorder – signal or...
Patent
1995-11-29
1997-10-07
Drodge, Joseph W.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
55270, 55274, 210138, 210143, B01D 1712, B01D 3514
Patent
active
056743815
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an assembly of a filtering apparatus and a replaceable filter.
In various types of filtering apparatuses, such as industrial exhausters, vacuum cleaners, filtering devices in lubrication systems etc., the filter should be replaced periodically because clogging will degrade its operation. When it is replaced several things can go wrong, such as incorrect fitting, fitting of a wrong or unapproved type and the like, which jeopardizes the correct operation of the filtering apparatus or even personal safety.
It is the object of the invention to provide an assembly of a filtering apparatus and a replaceable filter in which this disadvantage is removed in an effective way.
For this purpose, the assembly according to the invention is characterized by an electronic filter identification system including an electronic label on the filter and read-out means on the filtering apparatus.
Due to these features it is permitted that the read-out means checks the correct fitting of a proper filter type by means of the label thereby avoiding mistakes.
It is for example possible that the read-out means is connected to a control unit of the filtering apparatus and the control unit is influenced by the read-out means, in which case preferably the control unit is only actuable upon disposing a filter in the filtering apparatus having a proper label. In this way it is impossible to operate the filtering apparatus together with an improper filter, thus avoiding undesirable or even dangerous situations.
In a further development of the invention, the filter identification system may be interactive permitting for example the provision of a label with a read and write memory adapted to store the number of operating hours of the filter and to switch off the filtering device if the maximum permitted number of operating hours has been reached. This prevents the filter from being used too long which would endanger the proper operation of the filter. Since the label in the filter itself counts the number of operating hours, a correct counting is maintained also when the filter is removed from the filtering apparatus and is fitted again in the same or another filtering apparatus, so that a timely warning for the end of the operating time is ensured.
Preferably, the filtering apparatus comprises an indicating means such as a display or indicator lamps of a control panel, for showing information on the filter.
With this indicating means an operator can be provided with information received by the read-out means of the filter label, for example the fitting of an incorrect filter, or the attainment of the maximum operating time, so that the necessary actions can be taken immediately.
The invention includes both the assembly of a filtering apparatus and a filter, and the filtering apparatus and the filter having the features as mentioned separately.
The invention will hereafter be elucidated with reference to the drawing showing a substantially simplified diagram of an exemplary embodiment of the invention.
The only FIGURE of the drawing shows a filtering apparatus indicated by reference numeral 1 and accommodating therein an exchangeable filter 2. The filtering apparatus 1 may be part of a great number of different types of apparatus, such as for instance industrial exhausters to be used in welding operations for example, in vacuum cleaners or also in fluid circuits in which a fluid is filtered during each circulation. The fluid includes both air, gas and liquids. The filter 2 will preferably be a mechanical filter in which the fluid is guided through a porous material or a material structure having small passage openings separating solid matter from the fluid. For this purpose, the drawing shows a fluid line 3 extending through the filter 2, and a pressure or vacuum source 4, for example a pump, for forcing the fluid through the filter 2.
The replaceable filter 2 has an electronic label 5 to be read out by a read-out means 6 which is mounted in the filtering apparatus 1 and in this case being connected to a central con
REFERENCES:
patent: 4654140 (1987-03-01), Chen
patent: 5192424 (1993-03-01), Beyne et al.
patent: 5354979 (1994-10-01), Adelson et al.
patent: 5536395 (1996-07-01), Kuennen et al.
Doctro A.V.V.
Drodge Joseph W.
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