Device and method for a protective mask
First Claim
1. A device for a protective mask comprising means for detecting that a protective-mask user is breathing through the breathing filter of the protective mask, wherein the means for detecting protective-mask use comprise a pressure difference sensor arranged to measure a pressure difference between the pressure in the protective mask and the ambient pressure, and in that a processing unit connected to the pressure difference sensor is arranged so as to compare the pressure difference values with a reference pattern for a breath in order to determine whether the pattern of the pressure changes agrees with the reference pattern.
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Accused Products
Abstract
The present invention concerns a device and method for a protective mask comprising means (3) for detecting that a protective-mask user is breathing through the breathing filter of the protective mask. The invention is characterized in that the means for detecting protective-mask use are arranged to sense the underpressure that arises in the protective mask during inhalation.
11 Citations
7 Claims
- 1. A device for a protective mask comprising means for detecting that a protective-mask user is breathing through the breathing filter of the protective mask, wherein the means for detecting protective-mask use comprise a pressure difference sensor arranged to measure a pressure difference between the pressure in the protective mask and the ambient pressure, and in that a processing unit connected to the pressure difference sensor is arranged so as to compare the pressure difference values with a reference pattern for a breath in order to determine whether the pattern of the pressure changes agrees with the reference pattern.
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7. A method for detecting that a protective-mask user is breathing through the breathing filter of the protective mask, wherein a pressure difference between the pressure in the protective mask and the ambient pressure is measured to detect protective-mask use, and in that the pressure difference values are compared with a reference pattern for a breath in order to determine whether the pattern of the pressure difference values agrees with the reference pattern.
Specification