Negative ion detector

Abstract

The invention discloses a negative ion detector, which relates to the field of detection equipment. The negative ion detector in the technical scheme comprises a casing; air duct assemblies are arranged in the casing corresponding to an air inlet and an air outlet of the casing; the air duct assembly comprises a shell forming a channel, the shell is a bent pipe body composed of a straight-throughpart and an air exhaust part, and the air exhaust part is located on one side of the straight-through part, and the axis of the air outlet intersects with the projection of the axis of the straight-through part on the bottom face of the casing. The negative ion detector has the beneficial effects that through the air duct assembly structure in the scheme, the air is driven by the fan, the air enters from the metal air inlet channel, negative electricity is added to the metal tubular channel due to the fact that the metal air inlet channel is in a straight pipe shape, negative ions in the flowing-in air do not touch the metal channel when moving towards the metal piece, and due to the fact that the metal rod-shaped piece rather than a nonmetal sleeve is arranged inside, the air inlet amountis increased, and the situation that an inner ring blocks air is avoided.

Description

technical field [0001] The invention relates to the field of detection equipment, in particular to a negative ion detector. Background technique [0002] Negative air ions are the general term for negatively charged individual gas molecules and light ion clusters. As one of the important members of active oxygen, negative ions are similar in structure to superoxide free radicals with negative charge, and have strong redox effect, which can destroy the barrier of bacterial virus charge and the activity of bacterial cell active enzymes; in addition, the air Negative ions can settle suspended particles in the air. However, the higher the negative ion concentration, the better. When the concentration exceeds 106 / cm3, negative ions will have certain toxic and side effects on the body. [0003] At present, the detection of air negative ions mainly relies on the negative ion detector. The principle of the negative ion detector is basically to keep the different parts of the probe...

AI Technical Summary

Problems solved by technology

[0004] The air inlets of common negative ion detectors on the market are mostly scattered structures, which are inconvenient to operate when detecting gases, and the exhaust ports are also scattered around the instrument. The channels of commonly used negative ion detectors are mostly as follows: figure 1 The form of two metal plate structure, the upper is the pole plate, the lower is the receiving plate, under the action of the exhaust fan, the gas to be detected is circulated between the two metal plates, but the exhaust fan is circular, and the gas in the detection channel The wind is rotating, which causes some negative ions to be blown to the plate, resulting in loss and deviation of the detected data, so a solution is needed to solve the data error caused by the gas rotation

[0005] like figure 2 As shown, there are also some negative ion detector channel structures that are fixed by two metal sleeves. Under the action of the exhaust fan, the absorbed gas can only enter and circulate from the space between the two channels, and the inner metal sleeve needs to be fixed, and the fixed part will also Obstruct the gas access, so that the test gas is less, resulting in inaccurate detected data, so a solution is needed to reduce the obstruction of the detection structure to the gas

[0006] In addition, the channels of commonly used negative ion detectors are mostly in the shape of a straight cylinder, and it is difficult to fix between the fan and the straight cylinder, and because the fan is located behind the straight cylinder, it is difficult to fix the detection probe behind the straight cylinder, and because negative ions are beneficial to the human body, the air negative ions entering the detector When the existing detectors are used, because of the structural problems of the detectors, the inspectors often stand behind the air outlet, which makes the inspectors uncomfortable. Therefore, a solution is needed to fix the detection probes behind the straight cylinder and use Exhaust air channel is not located at the rear of the instrument

[0007] As for the influence brought by the detection circuit, the current negative air ion detection devices are mainly portable and outdoor measurement types. Among them, the measurement range of portable devices is small and the accuracy is not high. The existing micro-current circuit design voltage and signal are unstable. , resulting in low measurement accuracy

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