Small-size particle condensation growth counter

Abstract

The invention discloses a small-size particle condensation growth counter. The small-size condensation particle counter comprises a flow splitting system, a filtering device, an evaporation chamber, aheat insulation device, a refrigeration sheet, an aerosol inlet and working solution recycling device, a working solution recycling pump, a working solution storage bottle, a condensation chamber, apressure measuring device, a light scattering measuring instrument, a flow limiting hole, a tee joint, a gas pump and a liquid inlet pump, wherein an inlet of the flow splitting system is connected with an object to be sampled; an outlet A of the flow splitting system is connected with the inlet of the filtering device through a hose; the outlet of the filtering device is connected with the evaporation chamber through a hose; a water absorption material is fixed in a middle cavity of the evaporation chamber. The counter disclosed by the invention adopts a back-to-back type design, and the arrangement manner of the evaporation chamber and the condensation chamber is changed into parallel arrangement from traditional axial arrangement, so that the space is effectively utilized and saved andthe miniaturization of a device is realized; the refrigeration sheet is arranged between the evaporation chamber and the condensation chamber and the heat generated by the refrigeration sheet in a refrigeration process is used for heating the evaporation chamber so that wastes of heat dissipation are reduced and a heat rejection fan is omitted.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring and relates to a small particle condensation growth counter. Specifically, it is a measuring instrument that condenses supersaturated vapor on the surface of particles to make nano-sized particles grow to the micron level, and then uses an optical counter to count the particles. Background technique [0002] In recent years, with the prominence of haze pollution in my country, people have paid more and more attention to atmospheric particulate matter. In 2012, our country will PM 2.5 Included in the ambient air quality standard. PM 2.5 It is defined as particles with an aerodynamic equivalent diameter of 2.5 microns or less, which can be suspended in the air for a long time and enter the human body with breathing, thereby causing harm to human health. What we usually call PM 2.5 Concentration refers to the mass concentration of particulate matter. Nanoparticles refer to part...

AI Technical Summary

Problems solved by technology

Although these invention patents all have the function of particle counting, they are limited to the range that optical detectors can detect, that is, micron-sized particles

[0007] In view of the above problems, the present invention proposes a new type of condensation growth counter for nanoparticles, which overcomes the shortcomings of large structure and high energy consumption, and realizes its miniaturization

Images