Device for the detection of noxious substances in the air supplied to a compartment occupied by people
First Claim
1. A device for the detection of noxious substances in air being supplied to a compartment occupied by people, said detection device comprising:
- a housing centered on an upright axis and adapted to be traversed by an air flow to be analyzed;
a first air chamber formed in said housing;
a second air chamber formed in said housing upstream of said first chamber, said second chamber being cylindrical and centered on said axis;
a sensor disposed in said first chamber;
a measuring slot formed in a wall of said housing separating said first and second chambers, said measuring slot being upstream of said sensor and in registration therewith for directing said air flow against said sensor;
a pulsator disposed in said second chamber for controlling said air flow through said housing to insure a constant air flushing of said sensor;
at least one air inlet formed in said housing and opening into said second chamber upstream of said pulsator for the admission of air into said second chamber; and
at least one first air outlet formed in said housing at one end thereof and opening into said first chamber downstream of said sensor for venting said air flow from said first chamber.
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Accused Products
Abstract
One or more sensors are used for the indication and/or control and/or adjustment of filter devices and/or ventilation systems in relation with a measured value or respective measured values, established by the sensor, or respective sensors. In order to provide an economically simple and maintainance free device of the afore-mentioned kind with reduced space requirements, which responds to all common air pollutants and insures a reliable reading, the invention proposes that the sensor be placed in a housing with a side facing the oncoming flow preceded within the housing by a measuring slot abutting an air chamber of the housing, where a pulsator is located, whereby one or more air-inlet openings lead to the cylinder space of the air chamber facing away from the sensor. The pulsator consists of a piston coupled with an oscillator. In the air chamber an air-conditioning device, preferably a heating device, is provided.
30 Citations
18 Claims
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1. A device for the detection of noxious substances in air being supplied to a compartment occupied by people, said detection device comprising:
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a housing centered on an upright axis and adapted to be traversed by an air flow to be analyzed; a first air chamber formed in said housing; a second air chamber formed in said housing upstream of said first chamber, said second chamber being cylindrical and centered on said axis; a sensor disposed in said first chamber; a measuring slot formed in a wall of said housing separating said first and second chambers, said measuring slot being upstream of said sensor and in registration therewith for directing said air flow against said sensor; a pulsator disposed in said second chamber for controlling said air flow through said housing to insure a constant air flushing of said sensor; at least one air inlet formed in said housing and opening into said second chamber upstream of said pulsator for the admission of air into said second chamber; and at least one first air outlet formed in said housing at one end thereof and opening into said first chamber downstream of said sensor for venting said air flow from said first chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification