A kind of air diluter and comprise the dust particle device of this air diluter
the present invention relates to a kind of dust particle device that is suitable for high concentration dust ion is detected and a kind of being used for the logical air diluter that purifies air and dilute of gas to be detected.
airborne particle counter is used for measuring dust particle size and the number in the clean environment unit volume air, and it is widely used in departments such as electronics, optics, chemistry, food, cosmetics, medical and health, biological products, Aero-Space.Existing airborne particle counter mainly is made up of sampling apparatus and measurement mechanism; Wherein, Sampling apparatus comprises air pump and filtrator etc.; It is used for gathering gaseous sample to be measured and produces sampling flow (sampling flow is generally between 2.83L/min～28.3L/min), and data are analyzed and obtained to measurement mechanism to the sample of sampling apparatus collection.When adopting existing airborne particle counter to carry out the detection of high concentration dust particle, need dilute the high concentration dust particle in advance, and control tested gas sampling flow and the airborne particle counter sampling flow can reach certain dilution ratio.Dilute the general little gases at high pressure that use through the atmosphere gas or the process purified treatment of purified treatment.Yet; Dilute when operation actual; Be difficult to make that the particle dilution ratio of different-grain diameter obtains reasonable consistance; And dilution can influence the sampling flow of part airborne particle counter, the refluence phenomenon appears easily when using little high pressure clean gas, finally influenced the accuracy of airborne particle counter measurement result.
Summary of the invention
technical matters to be solved by this invention is the deficiency that overcomes prior art; A kind of air diluter that high concentration dust ionized gas is diluted that is exclusively used in is provided; Its dilution ratio to the particle of different-grain diameter has consistance preferably, and avoids diluting the influence to the airborne particle counter sampling flow.
the present invention also will provide a kind of high concentration dust ion dust particle device simultaneously, and it is suitable for the detection of high concentration dust ion, and accuracy is high.
For solving the problems of the technologies described above, a kind of technical scheme that the present invention takes is:
A kind of air diluter, it is divided into induction part, mixing portion and outlet gas part successively according to the gas flow direction, wherein:
Said induction part comprises the sample gas air intake opening, the admission piece that is communicated with the sample gas air intake opening that are used to feed sample gas, is used to feed the air injection port of pure air, the air chamber that is communicated with the air injection port;
Said mixing portion comprises the hybrid chamber with gas access and gas vent, and the gas access of said hybrid chamber is stretched in the air inlet end of said admission piece, and air chamber is connected with the gas access, and the gas access is diameter from outer to inner and becomes big tubaeform gradually;
said outlet gas part comprises the outlet passageway that is communicated with the gas vent of hybrid chamber.
are according to further embodiment of the present invention: said outlet gas part also comprises the outlet port that is used to discharge unnecessary gas that is arranged on the outlet passageway top.
separate through the buffering clamping plate between said hybrid chamber and the air chamber according to a concrete aspect of the present invention, and said gas access is opened on the buffering clamping plate, and particularly the gas access is positioned at the center of buffering clamping plate.
The another technical scheme that
the present invention takes is: a kind of dust particle device; It is except comprising sampling apparatus and measurement mechanism; Also comprised above-mentioned air diluter, the outlet side of the outlet passageway of air diluter is communicated with the thief hatch of sampling apparatus.
Because the enforcement of above technical scheme, the present invention compared with prior art has following advantage:
air diluter of the present invention can be through the control hybrid chamber the ratio of internal diameter of diameter and admission piece of air intake regulate dilution ratio; Gas flow is unobstructed in the hybrid chamber; Gas mixes full and uniform; Seldom there is particle in cavity, to deposit, makes that the dilution ratio of different-grain diameter particle has consistance preferably in the high concentration dust particle gas; In addition, the air diluter of this structure forms negative pressure at the admission piece front end, prevents that effectively gas from passing through the phenomenon that admission piece flows backwards.
dust particle device of the present invention; Before the thief hatch of sampling apparatus, set up air diluter of the present invention, before sampling, gaseous sample to be measured is mixed fully with clean gas and dilutes; This air diluter can guarantee that the dilution ratio of different-grain diameter particle in the high concentration dust particle gas has consistance preferably; And can not impact sampling flow, therefore, airborne particle counter gained measurement result of the present invention is more accurate.
Description of drawings
are done further detailed explanation below in conjunction with concrete embodiment to the present invention.
Fig. 1 is the structural representation according to air diluter of the present invention;
wherein: 1, induction part; 2, mixing portion; 3, outlet gas part; 4, buffering clamping plate; 10, sample gas air intake opening; 11, admission piece; 110, air inlet end; 12, air injection port; 13, air chamber; 20, hybrid chamber; 200, gas access; 201, gas vent; 30, outlet passageway; 31, outlet port.
dust particle device generally comprises sampling apparatus and measurement mechanism, and these are prior art.The improvement that the present invention did is, increases an air diluter that can dilute sample gas at the front end of the thief hatch of sampling apparatus.
As shown in Figure 1, the air diluter mainly is made up of induction part 1, mixing portion 2 and outlet gas part 3, wherein:
induction part 1 comprises the sample gas air intake opening 10, the admission piece 11 that is communicated with sample gas air intake opening 10 that are used to feed sample gas, is used to feed the air injection port 12 of pure air, the air chamber 13 that is communicated with air injection port 12, and described sample gas is dust particle gas to be detected; Pure air can be the little gases at high pressure through the atmosphere gas of purified treatment or process purified treatment.
mixing portion 2 comprises the hybrid chamber 20 with gas access 200 and gas vent 201.Separate through buffering clamping plate 4 between hybrid chamber 20 and the air chamber 13, gas access 200 promptly is positioned at the center of buffering clamping plate 4, and buffering clamping plate 4 are tubaeform, makes gas access 200 be diameter from outer to inner and becomes big tubaeform gradually.The gas access 201 of said hybrid chamber 20 is stretched in the air inlet end 110 of admission piece 11; Thereby directly sample gas is passed in the hybrid chamber 20; Air chamber 13 is connected with gas access 200; The pure air that feeds from air injection port 12 is through air chamber 13, and 200 enter into hybrid chamber 20 from the gas access, the ratio of internal diameter that changes diameter and the admission piece 11 of gas access 200 can regulate to sample gas dilution ratio.
outlet gas part 3 comprises the outlet passageway 30 that is communicated with the gas vent 201 of hybrid chamber 20 and is positioned at the outlet port 31 that outlet passageway 30 tops are used to discharge unnecessary gas.The outlet end of outlet passageway 30 is communicated with the thief hatch of the sampling apparatus of dust particle device.
compared with prior art; The present invention can keep consistance preferably to the dilution ratio of different-grain diameter particle in the high concentration dust particle gas; Can the sampling flow of sampling apparatus not impacted; Prevented gas refluence phenomenon, the accuracy of dust particle device that includes air diluter of the present invention is also just higher.
More than the present invention has been done detailed description; Its purpose is to let the personage that is familiar with this art can understand content of the present invention and implements; Can not limit protection scope of the present invention with this; All equivalences of doing according to spirit of the present invention change or modify, and all should be encompassed in protection scope of the present invention