Multiple reflection air chamber

Abstract

The invention relates to a multi-reflection gas chamber, comprising an optical cell which is a hollow cuboid with two-end transparent; a main reflector plate and a 1 / 2 reflector plate which are respectively fixed on the two transparent ends with an O-shaped sealing ring arranged therebetween; a main reflector bonded on the main reflector plate, two 1 / 2 reflectors parallelly bonded on the 1 / 2 reflector plate; a light inlet and a correspondingly arranged light outlet which are respectively arranged on two side plates integrated with the optical cell; an incident reflector and an output reflector which are respectively arranged at the light inlet and the light outlet in the optical cell and respectively forms an angle of 45 DEG with the light entry direction and the light output direction; two gas ports arranged on the optical cell, and a two-end transparent packing block fixedly connected between the optical cell and the 1 / 2 reflector plate. The invention expands the measurement range, and realizes accurate measurement to gases with different concentration.

Description

technical field [0001] The invention relates to a gas chamber, in particular to a multiple reflection gas chamber used in an infrared analyzer. Background technique [0002] At present, the gas chambers used in infrared analyzers mainly include straight-through gas chambers and multi-reflection gas chambers. Among them, the straight-through gas chambers have simple structure, small gas chamber volume, and fast reaction speed. Commonly used methods. However, the straight-through gas chamber is limited by the size of the standard case, so that the optical path does not exceed 200mm, so the straight-through gas chamber is limited to the measurement of high-concentration gases. The characteristic of the multi-reflection air chamber is that in a limited space, the principle of multiple reflections is used to increase the optical path, thereby increasing the optical depth. However, due to the structure of the air chamber, the optical path of the existing multi-reflection air cham...

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Problems solved by technology

However, the straight-through gas chamber is limited by the size of the standard case, so that the optical path does not exceed 200mm, so the straight-through gas chamber is limited to the measurement of high-concentration gases

The characteristic of the multi-reflection air chamber is that in a limited space, the principle of multiple reflections is used to increase the optical path, thereby increasing the optical depth. However, due to the structure of the air chamber, the optical path of the existing multi-reflection air chamber At least 800mm, so the existing multi-reflection gas chamber is only suitable for the analysis and measurement of trace gases, such as the analysis and measurement of some trace harmful gases in the atmosphere

That is to say, the traditional gas chamber cannot obtain an optical path ranging from 200mm to 800mm, so it is impossible to measure and analyze medium-concentration gases

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