MAIN STREAM GAS ANALYZING DEVICE
First Claim
1. A main stream gas analyzing device, comprising:
- a measuring chamber for receiving a gas flow, the measuring chamber being coupled with a main stream path of a respiratory device;
an infrared reflective material provided on an inner surface of the measuring chamber;
an infrared radiation source directed toward the infrared reflective material of the measuring chamber and obliquely angled relative to a longitudinal axis of the measuring chamber such that infrared radiation being emitted from the infrared radiation source is reflected off of the infrared reflective material at least once; and
an infrared radiation detector obliquely angled relative to the longitudinal axis of the measuring chamber to receive the reflected infrared radiation.
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0 Petitions
Accused Products
Abstract
A main stream gas analyzing device for measuring a concentration of a trace gas present in a gas stream and a method of measuring the concentration of the trace gas is disclosed. The main stream gas analyzing device includes a measuring chamber for receiving a gas flow, an infrared reflective material provided on an inner surface of the measuring chamber, an infrared radiation source directed toward the infrared reflective material of the measuring chamber and obliquely angled relative to a longitudinal axis of the measuring chamber such that infrared radiation being emitted from the infrared radiation source is reflected off of the infrared reflective material at least once, and an infrared radiation detector obliquely angled relative to the longitudinal axis of the measuring chamber to receive the reflected infrared radiation.
15 Citations
36 Claims
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1. A main stream gas analyzing device, comprising:
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a measuring chamber for receiving a gas flow, the measuring chamber being coupled with a main stream path of a respiratory device; an infrared reflective material provided on an inner surface of the measuring chamber; an infrared radiation source directed toward the infrared reflective material of the measuring chamber and obliquely angled relative to a longitudinal axis of the measuring chamber such that infrared radiation being emitted from the infrared radiation source is reflected off of the infrared reflective material at least once; and an infrared radiation detector obliquely angled relative to the longitudinal axis of the measuring chamber to receive the reflected infrared radiation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of determining a concentration of at least one trace gas species present in a gas stream, the method comprising:
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coupling a measuring chamber for receiving the gas stream to a main stream path of a respiratory device, the measuring chamber having an infrared reflective material provided on an inner surface of the measuring chamber; passing the gas stream through the measuring chamber; emitting infrared radiation through the gas stream and towards the infrared reflective material at an oblique emitting angle relative to a longitudinal axis of the measuring chamber such that the infrared radiation is reflected off of the infrared reflective material at least once; measuring the reflected infrared radiation via an infrared radiation detector obliquely angled relative to the longitudinal axis of the measuring chamber to receive the reflected infrared radiation; and determining the amount of the at least one trace gas species present in the gas stream based on the infrared radiation measurement. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification