Method and device for detecting the state of an air filter of an air conditioning system
a technology of air filter and state detection, which is applied in the direction of cooling fluid circulation, lighting and heating apparatus, domestic cooling apparatus, etc., can solve the problems of limited absorption capability, decreased filtering capability of other filters, and increased pollution, so as to achieve simple and reliable inspection
Inactive Publication Date: 2007-07-05
HELLA KG HUECK & CO
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Benefits of technology
[0005] It is therefore an object of the invention to provide a method and a device of the above-mentioned type, with which a particularly simple and reliable inspection is possible.
Problems solved by technology
The problem with active carbon filters is that even though the filters are superbly suitable for absorbing pollutants, they only have a limited absorption capability.
If an active carbon filter reaches the limit of its absorption capability, it begins to release pollutants, which it had already absorbed.
The filtering capability of other filters also decreases after an extended operating time or the air resistance increases, and the efficiency of the air conditioning system is impacted.
Method used
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[0015] The sole figure of the drawing illustrates a part of an air conditioning system 1 in a HVAC system 1 (heating, ventilating, air conditioning). In the right-hand area of this HVAC system 1, air is supplied into the system via a supply 3 by means of a ventilator 2. The system comprises a filter 4, an evaporator 5 of the air conditioning system and, normally, a heat exchanger 6 for the possible heating of the air, which is guided through. In the left-hand area, the air is guided through ducts 11 to the fan nozzles. In addition to the evaporator, the air conditioning system itself comprises further, non-illustrated components, i.e. in essence, a condenser, a pump for driving the cooling means, and a compressor for condensing the cooling means. Typically, a discharge 7 for condensed water is disposed below evaporator 5 of the air conditioning system. Said discharge fills a container 8, in which a sensor 9 is disposed. Preferably, sensor 9 is disposed in the bottom area. Sensor 9 m...
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A method and a device detects the state of an air filter in an air conditioning system for the interior of a motor vehicle. Condensed water created at the evaporator is discharged and fed to a sensor, which determines a parameter of the condensed water, and which, from a change or a certain value of the measured parameter, draws a conclusion regarding a change of the state of the air filter.
Description
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The invention pertains to a method for detecting the state of an air filter in an air conditioning system for the interior of a motor vehicle. Furthermore, the invention pertains to a corresponding device for carrying out the method for detecting the state of an air filter of an air conditioning system for the interior of a motor vehicle and to an air conditioning system for a motor vehicle. [0003] 2. The Prior Art [0004] Air filters, such as pollen filters or, in particular, activated carbon filters, for example, are integrated in such air conditioning systems. The problem with active carbon filters is that even though the filters are superbly suitable for absorbing pollutants, they only have a limited absorption capability. If an active carbon filter reaches the limit of its absorption capability, it begins to release pollutants, which it had already absorbed. It is thus necessary to replace the filter before this...
Claims
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IPC IPC(8): F25B49/00F25D17/04
CPCB60H1/3233B60H2003/0683B60H3/0616B60H1/32331
Inventor NIEMANN, THOMASHEILENKOTTER, CARSTEN
Owner HELLA KG HUECK & CO