• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an arrangement and a method for setting and / or functional checking of one or more condensation particles counter (s), the arrangement comprising a condensation particle counter (1), wherein the condensation particle counter (1) comprises a flow-through measuring channel arrangement (2) the measuring channel arrangement (2) extends from a junction (3) through a saturation region (4) and a condensation region (5), wherein the measuring channel arrangement (2) opens into a measuring device (7) through an outlet section (6), and wherein the measuring channel arrangement ( 2) comprises a supersaturation region (9) in which the reference gas stream (13) enriched or saturated with the fuel (18) is in a supersaturated state, wherein in the supersaturation region (9) of the measurement channel arrangement (2) a condensation element (8) with one of the Measuring channel wall (11) of the measuring channel arrangement (2) spaced arranged Abtropfstelle (10) arranged or r is arranged, and that the condensation element (8) for collecting and dropwise delivery of condensed from the supersaturated reference gas stream (13) fuel (12) in the reference gas stream (13) and in the measuring device (7) is arranged.
    公开号:AT519132A4
    申请号:T51030/2016
    申请日:2016-11-14
    公开日:2018-04-15
    发明作者:Ing Christos Berger Dipl；Ing Martin Cresnoverh Dipl
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    Arrangement and method for setting or functional testing of a
    Condensation particle counter
    The invention relates to an arrangement and a method according to the preambles of the independent claims.
    In particular, the present invention relates to an arrangement and a method for setting a condensation particle counter, the basic structure of a condensation particle counter being described, for example, in patent specifications AT 515941 B1 or AT 515686 B1.
    Exemplary condensation particle counter are known and published in different versions. In a condensation particle counter, an aerosol, for example a particle-laden exhaust gas stream of an internal combustion engine, is conveyed through a measuring channel arrangement. Along this measuring channel arrangement, a saturation device, a condensation device and a particle detector are successively arranged. In a first step, the aerosol is enriched and / or saturated by the saturation device with a feedstock, for example with a liquid or vaporous feedstock such as alcohol. The saturated or enriched with this fuel aerosol is passed in a further step by a condensation device in which a supersaturation of the aerosol through the operating material, for example by the cooling of the aerosol takes place. In particular, the particles of the aerosol act as condensation nuclei, whereby the fuel condenses on the particles in the aerosol, whereby the size of these particles increases. As a result, even small particles can be detected by the particle detector. Conventional particle detectors are embodied, for example, as particle counters, in particular scattered-light detectors, in which light scattered on or from the particles is detected and evaluated by a detector. In this case, individual pulses are detected by the particles in the detector, which can be evaluated and counted.
    The size of the particles from which this condensation process takes place depends in particular on the supersaturation of the working fluid in the aerosol. For comparable measurement results, a calibration of the condensation particle counter must therefore be carried out.
    According to the prior art, the calibration of condensation particle counters for the automotive industry, for example, by means of a particle generator, an ionizing radiation source and a differential mobility analyzer, is generated by the monodisperse aerosol, for example, with a particle size of 23 nm. In a further step, the supersaturation of the aerosol is changed by changing the temperature difference between the condensation unit and the saturation unit until 50 percent of the particles produced are counted by the condensation particle counter. As a result, the so-called "cutpoint", ie the 50% counting efficiency, is set to 23 nm.
    A disadvantage of this calibration method is that the operation and the use of a particle generator are associated with a relatively high cost. Apart from the necessary provision of the resources for operating the particle generator, combustible operating gases and toxic exhaust gases are generated by conventional particle generators. The operation of the ionizing radiation source is complicated due to legal requirements and only by authorized personnel feasible.
    The object of the invention is therefore to provide an arrangement and a method for adjusting, in particular for adjusting or calibrating, a condensation particle counter, by which the disadvantages of the prior art are overcome or reduced. This includes in particular that an arrangement and a method are provided which enable a simple and efficient setting or calibration or calibration of a condensation particle counter.
    The object of the invention is achieved in particular by the features of the independent claims.
    Optionally, the invention relates to an arrangement for setting and / or function verification, in particular for adjusting or calibrating a condensation particle counter or more identical condensation particle counter, wherein the arrangement comprises a condensation particle counter, wherein the condensation particle counter comprises a flow in the adjustment of a reference gas flow measuring channel arrangement, wherein the measuring channel arrangement from a junction for supplying the reference gas flow, extending through a saturation region for enrichment or saturation of the reference gas flow with a liquid or vapor fuel, through a condensation region downstream of the saturation region in the flow direction of the reference gas flow to supersaturation of the enriched in the saturation region or saturated reference gas flow, the measuring channel arrangement by a the condensation region in the flow direction of the reference gas troms downstream outlet section opens into a measuring device, and wherein the measuring channel arrangement comprises a supersaturation region in which the previously enriched with the fuel or saturated reference gas stream is in a supersaturated state.
    Optionally, it is provided that in the supersaturation region of the measuring channel arrangement a condensation element with a spaced apart from the measuring channel wall of the measuring channel arrangement Abtropfstelle is arranged or arranged, and that the condensation element for collection and dropwise delivery of condensed from the supersaturated reference gas stream fuel into the reference gas stream and into the measuring device is set up.
    If appropriate, it is provided that the supersaturation region extends from the condensation region into the outlet section within the measuring channel arrangement.
    Optionally, it is provided that the measuring channel arrangement is formed in the outlet section as a nozzle and in particular as a separating nozzle, wherein the measuring channel wall is formed in the outlet section at least partially converging obliquely or conically.
    Optionally, it is provided that the condensation element is arranged in the outlet section, and / or that the condensation element is arranged in an outlet section designed as a nozzle.
    Optionally, it is provided that the outlet section is designed as a replaceable nozzle module, and that the condensation element is provided in or on the nozzle module.
    Optionally, it is provided that the condensation element is designed as projecting into the supersaturated reference gas flow extension, projecting web or projecting bridge.
    If appropriate, it is provided that the condensation element in that region of the measuring channel arrangement in which the condensation element is provided occupies less than 20%, in particular less than 10% of the area of the cross-section of the measuring channel arrangement, and in particular is thin, thread-like and / or wire-shaped.
    Optionally, it is provided that the condensation element extends from the measuring channel wall at least in sections along or obliquely along the flow direction of the reference gas flow, that the Abtropfstelle is arranged in the rearmost along the flow direction of the condensation element, and / or that the drip point of the condensation element as in the flow direction acting drip is formed.
    Optionally, it is provided that a single Abtropfstelle is provided, wherein the Abtropfstelle is arranged in particular centrally in the reference gas flow.
    Optionally, it is provided that the reference gas is a substantially particle-free or low-particle reference gas such as air, ambient air or conditioned ambient air such as filtered, tempered and / or dried ambient air.
    Optionally, it is provided that the measuring channel arrangement of the condensation particle counter flows through a particle-laden aerosol stream, in particular from a particle-laden exhaust gas stream of an internal combustion engine, wherein the measuring channel arrangement of the confluence through the saturation region for enrichment or saturation of the aerosol stream with the fuel, through the The condensation region downstream of the saturation region in the flow direction of the aerosol flow extends to supersaturate the saturated or saturated aerosol stream in the saturation region and to accumulate condensed operating medium on particles of the aerosol stream, wherein the measuring channel arrangement opens into the measuring device during measurement operation through the outlet section downstream of the condensation zone in the flow direction of the aerosol stream, and wherein the condensation element is removed in the measuring operation.
    Optionally, it is provided that in the saturation region, a saturation device for enrichment and / or saturation of the reference gas or the aerosol is provided with the operating material, and that the saturation power of the saturation device, in particular parameters such as the heating power and / or the amount of supplied fuel is adjustable or are.
    Optionally, it is provided that a condensation device for condensation or supersaturation of the transported or bound in the reference gas or in the aerosol is provided in the condensation region, and that the condensation power, in particular parameters such as the cooling capacity of the condensation device, is adjustable.
    Optionally, it is provided that a conveying device for conveying the reference gas or the aerosol is provided by the measuring channel arrangement, which is designed in particular as a blower or as a suction device, and that the delivery rate of the conveying device, in particular parameters for influencing the delivery rate, is adjustable.
    Optionally, the invention relates to a method for adjusting and / or functional testing, in particular for adjusting or calibrating a condensation particle counter or more identical condensation particle counter, wherein the method comprises the following steps: - conveying a reference gas flow through the measuring channel arrangement, wherein the reference gas in particular particle-poor or substantially particle-free Reference gas such as air, ambient air or conditioned ambient air is, - enriching or saturating the reference gas stream with a fuel in the saturation region of the measuring channel arrangement, - oversaturation of the reference gas stream in the condensation region of the measuring channel arrangement, - separating and collecting condensed from the supersaturated reference gas stream fuel to the condensation element, - and detecting the drop of fuel discharged from the condensation element in the measuring device.
    Optionally, it is provided that the method comprises the following steps: determining the frequency of the drops of fuel emitted by the condensation element and detected by the measuring device, and adjusting the parameters of the saturation device,
    Condenser and / or the conveyor until the detected frequency corresponds to a reference frequency or a reference frequency range.
    Optionally, it is provided that the method comprises the following steps: determining the droplet size (s) of the drop of fuel emitted by the condensation element and detected by the measuring device, and adjusting the parameters of the saturation device, the condensation device and / or the conveyor device until the detected one Drop size corresponds to a reference droplet size or a reference droplet size range.
    If appropriate, it is provided that the following steps are carried out to determine the reference frequency, the reference frequency range, the reference droplet size and / or the reference droplet size range: conveying a calibrated aerosol flow generated by a particle generator, an ionizing radiation source and a differential mobility analyzer through the measuring channel arrangement with the condensation element removed - the calibrated aerosol stream contains a known particle quantity and / or particle size, - saturating or saturating the calibrated aerosol flow with the fuel in the saturation region of the measuring channel arrangement, - oversaturating the calibrated aerosol flow in the condensation region of the measuring channel arrangement, - adjusting and setting the parameters of the saturation device, the condensation device and / or the conveyor device until the values detected by the measuring device are equal to a predetermined value or range of values r correspond to the calibration, - stopping the conveyance of the calibrated aerosol flow, - attaching the condensation element in the supersaturation region of the measuring channel arrangement, - conveying a reference gas flow through the measuring channel arrangement, wherein the
    Reference gas is particularly low-particle or substantially particle-free reference gases such as air, ambient air or filtered ambient air and wherein the previously set parameters of the saturation device, the condensation device and / or the conveyor are maintained, - enriching or saturating the reference gas stream with the fuel in the saturation region of the measuring channel arrangement, - supersaturation the reference gas stream in the condensation region of the measuring channel arrangement, - separating and collecting fuel condensed from the reference gas stream at the condensation element, - detecting the dropwise delivered from the condensation element operating material in the measuring device, - and determining or setting the reference frequency, the reference frequency range, the reference droplet size or reference droplet size range.
    The arrangement according to the invention preferably comprises in all embodiments a condensation particle counter and a condensation element. In all embodiments, the arrangement according to the invention preferably comprises a reference gas stream of a particle-poor or substantially particle-free reference gas such as air, ambient air or treated, for example filtered, tempered and / or dried air. In particular, the reference gas in all embodiments is a gas or an aerosol that does not correspond to the aerosol to be measured.
    The arrangement according to the invention and the method according to the invention make it possible to set and / or check a condensation particle counter or a plurality of identical condensation particle counters so that the data determined by the measuring device are comparable to the data from measuring devices of other condensation particle counters.
    The adjustment or calibration of condensation particle counters takes place in particular by setting parameters of the saturation device, the condensation device and / or the conveying device. Preferably, a parameter is changed that affects the temperature difference between the saturation region and the condensation region. For example, the cooling capacity of the condensation device can be changed as a parameter. The saturation device comprises a device for supplying the fuel and optionally a heater. For example, a porous body is provided in the saturation device, which extends as far as the wall of the measuring channel arrangement or forms the wall of the measuring channel arrangement in the saturation region. By means of the conveying device, an optionally particle-laden gas is conveyed through the measuring channel arrangement. Parameters such as the delivery rate of the conveyor, the heating power of the saturator and / or the amount of fuel supplied may determine which amount of the fuel is added to the pumped gas and optionally also which degree of saturation of the gas is generated. The condensation device preferably comprises a cooling device for cooling the gas conducted through the condensation device. The temperature difference between the saturation device and the condensation device, in particular the cooling capacity of the condensation device and optionally the ratio between the cooling capacity of the condensation device, delivery capacity of the conveyor device and, if present, heating capacity of the saturation device, determine the degree of enrichment, saturation or supersaturation of the gas flow conveyed in the mass channel arrangement , Surprisingly, it has been found in practice that the frequency of the collected and discharged from a condensation element drops of condensing on this condensation element is a representative value for the adjustment of the parameters of the arrangement or the condensation particle counter. This means in particular that a plurality of identically constructed and calibrated condensation particle counter also during operation in an inventive arrangement and according to the inventive method, ie with a reference gas flow and with a provided in the measuring channel arrangement condensation element, substantially the same drop frequency and / or the same drop size in the measuring device exhibit.
    Due to this surprising finding identical condensation particle counter can be adjusted by the inventive arrangement and the method according to the invention, without having to use expensive additional equipment such as particle generators, etc. in each setting. Rather, the setting of the arrangement can be carried out during operation with a particle-poor or substantially particle-free reference gas stream, such as, for example, with filtered ambient air. Only for the calibration, which usually has to comply with legal regulations or standards, a particle generator is optionally connected. However, this serves only to check whether the previously made setting has led to the desired results, which is to be expected according to the invention.
    To set the arrangement, the condensation particle counter is provided with the condensation element. This happens, for example, by introducing the condensation element into the supersaturation region of the
    Condensation particle counter. For example, a change nozzle may be provided which is provided with a condensation element and which replaces the conventional nozzle of the condensation particle counter for operation in setting. For the normal operation of the condensation particle counter, the condensation element is preferably removed again so as not to falsify the measurement results.
    Optionally, it is provided that the measuring device comprises an optical measuring device, a particle counter and / or a scattered light detector.
    If appropriate, it is provided that the operating fluid is a liquid or vaporous substance depending on the operating temperature and operating pressure, which can preferably be mixed into the gas flowing through the measuring channel arrangement, in particular the reference gas flow or the aerosol flow. Preferably, the fuel can be bound or absorbed in the gas flowing through the measuring channel arrangement. An exemplary fuel is 1-butanol.
    Optionally, the arrangement and the condensation particle counter are designed as continuously operating devices. The gas, in particular the reference gas stream and / or the aerosol stream, is preferably conveyed continuously through the measuring channel arrangement.
    It is preferably provided that the measuring channel arrangement extends substantially vertically or obliquely from bottom to top, so that condensed operating material is conveyed by the gravity down into a collector at the channel walls. The drops delivered to the condensation element, however, are preferred by the
    Gas stream, in particular by the reference gas stream, entrained and conveyed against gravity in the measuring device.
    It is preferably provided in all embodiments that a periodic counting signal is generated in the measuring device by the use of the condensation element in the setting mode with parameters held constant. If the frequency of the periodic counting signal caused by the previous use in an already calibrated condensation particle counter is known, then it is possible, for example by varying the condensation device temperature, to calibrate further identical condensation particle counters, taking into account their specific flow rate, by adding their condensation device temperature for such a long time is varied until the frequency of the count signal of the identical condensation particle counter corresponds to that of the already calibrated condensation particle counter.
    Subsequently, the method according to the invention will be described with reference to an exemplary embodiment:
    A condensation particle counter is calibrated according to legal regulations or standards. This calibrated condensation particle counter is subsequently provided with the condensation element. Preferably, the condensation element is provided in the outlet section of the condensation particle counter. In particular, the outlet section of the condensation particle counter may comprise a replaceable nozzle, wherein for the method according to the invention the conventional nozzle is replaced by a nozzle with a condensation element. Subsequently, the arrangement is operated while maintaining the parameters set during calibration or adjustment. In this case, the measuring channel arrangement flows through a reference gas stream. This reference gas stream is preferably a particle-poor or substantially particle-free reference gas stream, such as air or filtered air. The reference gas stream is enriched in the saturation region with a liquid or vapor fuel and / or saturated. In particular in the downstream condensation region, the supersaturation of the reference gas flow occurs. Parts of the fuel are subsequently deposited and / or collected on the condensation element. The condensation element comprises a drip point at which drops collect and are entrained drop by drop through the reference gas stream. These drops are subsequently detected by the measuring device. The drip point of the condensation element is preferably arranged at a distance in front of the measuring channel wall, so that the drops are conducted away from the measuring channel walls with the reference gas flow into the measuring device.
    The frequency measured with these settings of the condensation particle counter, the frequency range, the droplet size or the droplet size range are recorded and serve subsequently as reference settings, reference frequency, reference frequency range, reference droplet size or reference droplet size range for the setting of this condensation particle counter or other identical condensation particle counter.
    To set a similar condensation particle counter this is provided with the odereinem identical condensation element. Further, the condensation particle counter is operated with a reference gas such as ambient air. If appropriate, the reference settings determined in the case of a condenser particle counter of the same type are also used and possibly changed and / or adapted. The drops emitted by the condensation element are detected by the measuring device. If the frequency or the drop size deviates from the previously determined reference, then the settings and / or the parameters of the condensation particle counter, in particular the parameters of the individual components of the condensation particle counter, can be changed such that the drop frequency and / or the drop size correspond to the reference. If, in addition, a calibration according to a legal regulation or standard, for example with a particle generator, is necessary, the adjustment made by the method according to the invention can be checked by the standard method.
    Subsequently, if appropriate, the condensation element can be removed again. The condensation particle counter can then be operated subsequently in normal operation with the aerosol to be tested.
    Even more identical condensation particle counter can be easily and efficiently set or preset.
    Another advantage of the method and the arrangement according to the invention is that the setting of an already calibrated
    Condensation particle counter can be easily checked. For this purpose, only the condensation element has to be attached to the condensation particle counter, the condensation particle counter must be operated with the reference gas and preferably with the reference settings, and the detected drop frequency and / or drop size must be checked.
    Optionally, the method thus also relates in all embodiments to a method for checking the function of the condensation particle counter, in particular for checking the adjustable parameters of the components of the condensation particle counter and / or for functional testing of the individual components of the condensation particle counter.
    In further consequence, the invention will be further described with reference to the figures and with reference to selected, non-limiting embodiments.
    FIG. 1 shows a schematic sectional view of an arrangement according to the invention.
    Figures 2a to 2f show different embodiments of possible embodiments of condensation elements.
    Unless otherwise indicated, the reference numerals of the figures correspond to the following components:
    Condensation particle counter 1, measuring channel arrangement 2, junction 3, saturation region 4, condensation region 5, outlet section 6, measuring device 7, condensation element 8, supersaturation region 9, drip point 10, measuring channel wall 11, condensed operating material 12, reference gas flow 13, saturation device 14, condensation device 15, conveying device 16, operating material reservoir 17, fuel 18.
    FIG. 1 shows a schematic sectional representation of relevant components of a possible embodiment of an arrangement according to the invention. The arrangement comprises a condensation particle counter 1 and a condensation element 8, wherein the condensation element 8 is preferably made removable. Of the
    Condensation particle counter 1 comprises a measuring channel arrangement 2 and a working fluid reservoir 17 containing the operating fluid 18. The measuring channel arrangement 2 corresponds to one or more channels through which the aerosol to be tested or measured flows in normal operation of the condensation particle counter 1. In the setting according to the present invention, the measuring channel arrangement 2 is traversed by a reference gas stream 13. The measuring channel arrangement 2 extends from a junction 3 through a saturation region 4, a condensation region 5 and an outlet section 6 and ends in a measuring device 7. The conveying of the reference gas stream 13 is effected by a conveying device 16.
    This conveyor 16 is designed in particular as a blower or compressor. In the present embodiment, the conveying device 16 sucks in the reference gas flow 13 during setting or checking and in normal operation the aerosol through the measuring channel arrangement 2.
    In the saturation region 4, a saturation device 14 is provided. This saturation device 14 serves for the enrichment and / or saturation of the gas stream passing by, in particular the reference gas stream 13. The saturation device 14 comprises, for example, a measuring channel wall 11 which is formed by a porous body. Through the porous body of the fuel 18 penetrates into the measuring channel 2, whereby an enrichment or saturation of the reference gas stream 13 takes place. Optionally, a spiral-shaped flushing of the saturation region 4 or the saturation device 14 is effected by a spiral junction 3 or measuring channel guide, whereby the gas to be enriched, in particular the reference gas flow 13, dwells longer in this area, whereby the saturation power can be increased. Optionally, the saturation device 14 also includes a heating, whereby the gas is also heated, and the enrichment performance and the saturation power can be improved.
    The saturation region 4 is followed by a condensation region 5 with a condensation device 15. The condensation device 15 preferably comprises a cooling, which in the present representation comprises a schematically drawn, spiral-shaped cooling channel. As a result of the cooling, the measuring channel arrangement 2 in the condensation region 5 is cooled. According to an embodiment, not shown, it can be provided that the cooling of
    Measuring channel arrangement 2 in the condensation region 5 by a wall cooling of the measuring channel walls 11 takes place. In the condensation region 5 or in the condensation device 15, the gas conveyed through this region, in particular the reference gas stream 13, is thereby cooled, with which it is preferable to increase the saturation, preferably to a supersaturation of the gas-equipment mixture, in particular of the reference gas stream 13 ,
    That region in which the conveyed gas, in particular the reference gas flow 13, is in a supersaturated state, is defined as the supersaturation region 9. Depending on the setting of different parameters of the condensation particle counter 1, however, the limits of this supersaturation region 9 can also be arranged at different locations depending on the gas passed through. The supersaturation region 9 thus extends from the condensation region 5 to the outlet section 6, wherein the beginning of the supersaturation region 9 is arranged at a point in the course of the condensation region 5.
    In the outlet section 6, the conveyed gas stream, in particular the reference gas stream 13, is preferably processed in order to be able to be output to the measuring device 7 in an optimized manner. According to the present embodiment, the outlet section 6 is nozzle-shaped and optionally acts as a separating nozzle, so that the particles or drops of fuel to be measured can be delivered to the measuring device 7 essentially in isolated form. In the present embodiment, the measuring channel wall 11 is nozzle-shaped in the outlet section 6 and thereby formed to converge.
    In the supersaturation region 9, the condensation element 8 is provided. In the present embodiment, the condensation element 8 is provided in the outlet section 6. In particular, the operating material 18 condenses on the condensation element 8. The condensation element 8 comprises a drip point 10. This drip point 10 is arranged at a distance from the measuring channel wall 11. This prevents condensed fuel 12 collected and dropwise discharged at the condensation element 8 from coming into contact with the measuring channel wall 11 and adhering there. Finally, according to the preferred embodiment, the fuel 12 collected or condensed on the condensation element 8 should be dispensed dropwise to the measuring device 7. Preferably, the
    Abtropfstelle 10 of the condensation element 8 is provided substantially centrally in the measuring channel arrangement 2 and in the respective section of the measuring channel arrangement 2.
    According to one embodiment, not shown, the condensation element 8 may also be provided away from the outlet section 6 in the supersaturation region 9.
    For example, according to this embodiment, not shown, the condensation element 8 may be arranged in the measuring channel arrangement 2 of the condensation region 5.
    According to an embodiment not shown, the condensation element 8 may be arranged in the region of the outlet section 6 of the supersaturation region 9. In this embodiment, not shown, the condensation element 8 optionally protrudes into the measuring device 7.
    Preferably, a single condensation element 8 is provided with a single Abtropfstelle 10, so that there is no interference of the droplet frequencies of different condensation elements 8.
    Figures 2a to 2f show different embodiments of possible condensation elements 8. The condensation elements 8 each comprise a Abtropfstelle 10, which is arranged away from the measuring channel wall 11. The condensation element 8 is provided in each case in the supersaturation region 9, in particular in the outlet section 6. The Abtropfstelle 10 is formed in particular by the fact that the condensation element 8 has a course or a shape which extends at least obliquely in the direction of reference gas stream 13 and / or in the direction of the conveying direction of the reference gas stream 13.
    For example, FIG. 2 a shows an embodiment in which the condensation element 8 is designed as a thin, v-shaped body, for example as a wire, whose tip is arranged in the rearmost region of the condensation element 8 in the flow direction of the reference gas flow 13. The fuel 12 collected or condensed on the condensation element 8 flows, in particular driven by the conveying device 16 and the reference gas stream 13, to the drip point 10, where a drop forms, which breaks off as soon as the flow through the reference gas stream 13 on the
    Drop acting forces exceed the cohesive forces and the adhesion forces of the condensed fuel 12.
    Figure 2b shows an embodiment in which the condensation element 8 is formed by two cross-shaped thin bodies arranged. These meet in the middle of the Abtropfstelle 10. This Abtropfstelle 10 is provided in the rearmost region of the condensation element 8. The two bodies, which form the condensation element 8 of FIG. 2b, may be formed, for example, as in FIG. 2a, FIG. 2d, or as in FIG. 2f.
    Figure 2c shows a condensation element 8, which is at least partially thread-shaped. At least the rear region of the condensation element 8, which forms the Abtropfstelle 10, is formed substantially slippery.
    Figures 2d and 2e show two embodiments in which the condensation element 8 is formed by a web-shaped body. In FIGS. 2 a, 2 d and 2 f, the body which forms the condensation element 8 has a substantially bridge-shaped design.
    In all embodiments, the condensation element 8 preferably comprises a drip-off nose in the region of the drip-off point 10. Basically, in all embodiments, the condensation element 8 is formed such that a Abtropfstelle 10 is formed, which causes a dripping of the condensing element 8 collected or condensed fuel 12 away from the measuring channel wall 11.
    权利要求:
    Claims (18)
    [1]
    claims
    1. Arrangement for setting and / or functional verification, in particular for adjusting or calibrating, a condensation particle counter (1) or more identical condensation particle counter (1), - wherein the arrangement comprises a condensation particle counter (1), - wherein the condensation particle counter (1) in a setting operation measuring channel arrangement (2) through which flows a reference gas flow (13), - wherein the measuring channel arrangement (2) comprises an inlet (3) for feeding the reference gas flow (13) through a saturation region (4) for enriching or saturating the reference gas flow (13) with a liquid or vaporous fuel (18), by a the saturation region (4) in the flow direction of the reference gas stream (13) downstream condensation region (5) for supersaturation in the saturation region (4) enriched or saturated reference gas stream (13), - wherein the measuring channel arrangement (2) by a condensation and the measuring channel arrangement (2) comprises a supersaturation region (9) in which the previously enriched with the operating material (18) or saturated reference gas stream (13) is present in a supersaturated state, characterized in that arranged in the supersaturation region (9) of the measuring channel arrangement (2) a condensation element (8) with a spaced from the measuring channel wall (11) of the measuring channel arrangement (2) arranged Abtropfstelle (10) or is arrangeable, - and that the condensation element (8) for collecting and dropwise delivery of condensed from the supersaturated reference gas stream (13) fuel (12) in the reference gas stream (13) and in the measuring device (7) is arranged.
    [2]
    2. Arrangement according to claim 1, characterized in that the supersaturation region (9) within the measuring channel arrangement (2) from the condensation region (5) in the outlet section (6), and optionally extends into the measuring device (7).
    [3]
    3. Arrangement according to claim 1 or 2, characterized in that the measuring channel arrangement (2) in the outlet section (6) as a nozzle and in particular as a separating nozzle, wherein the measuring channel wall (11) in the outlet section (6) formed at least partially converging obliquely or conically is.
    [4]
    4. Arrangement according to one of claims 1 to 3, characterized in that - the condensation element (8) in the outlet section (6) is arranged, - and / or that the condensation element (8) is arranged in a nozzle formed as an outlet portion (6) ,
    [5]
    5. Arrangement according to one of claims 1 to 4, characterized in that - the outlet section (6) is designed as a replaceable nozzle module, - and that the condensation element (8) is provided in or on the nozzle module.
    [6]
    6. Arrangement according to one of claims 1 to 5, characterized in that the condensation element (8) as in the supersaturated reference gas stream (13) projecting extension, projecting web or projecting bridge is formed.
    [7]
    7. Arrangement according to one of claims 1 to 6, characterized in that the condensation element (8) in that region of the measuring channel arrangement (2), in which the condensation element (8) is provided, less than 20%, in particular less than 10% of Surface of the cross section of the measuring channel arrangement (2) assumes, and in particular thin, thread-like and / or wire-shaped.
    [8]
    8. Arrangement according to one of claims 1 to 7, characterized in that - the condensation element (8) extends from the measuring channel wall (11) at least partially along or obliquely along the flow direction of the reference gas flow, - that the Abtropfstelle (10) in the along Viewed in the flow direction considered the rearmost region of the condensation element (8), - and / or that the Abtropfstelle (10) of the condensation element (8) is designed as acting in the flow direction drip.
    [9]
    9. Arrangement according to one of claims 1 to 8, characterized in that a single Abtropfstelle (10) is provided, wherein the Abtropfstelle (10) is arranged in particular centrally in the reference gas flow.
    [10]
    10. Arrangement according to one of claims 1 to 9, characterized in that the reference gas is a substantially particle-free or low-particle reference gas such as air, ambient air or conditioned ambient air such as filtered, tempered and / or dried ambient air.
    [11]
    11. Arrangement according to one of claims 1 to 10, characterized in that the measuring channel arrangement (2) of the condensation particle counter (1) in measuring operation by a particle-laden aerosol stream, in particular by a particle-laden exhaust stream of an internal combustion engine, flows through - the measuring channel arrangement ( 2) from the junction (3) through the saturation region (4) for enrichment or saturation of the aerosol stream with the fuel (18), through the condensation region (5) downstream of the saturation region (4) in the flow direction of the aerosol flow for supersaturation in the saturation region (4 In the measurement mode, the measuring channel arrangement (2) is guided into the measuring device (7) by the outlet section (6) connected downstream of the condensation zone (5) in the flow direction of the aerosol flow ) t, - and wherein the condensation element (8) is removed in the measuring operation.
    [12]
    12. Arrangement according to one of claims 1 to 11, characterized in that in the saturation region (4) is provided a saturation device (14) for enrichment and / or saturation of the reference gas or the aerosol with the fuel (18), and that the saturation power of Saturation device (14), in particular parameters such as the heating power and / or the amount of supplied fuel (18), is adjustable or are.
    [13]
    13. Arrangement according to one of claims 1 to 12, characterized in that in the condensation region (5) a condensation device (15) for condensation or supersaturation of the reference gas or in the aerosol transported or bound fuel (18) is provided, and that the condensation power, In particular, parameters such as the cooling capacity of the condensation device (15), is adjustable.
    [14]
    14. Arrangement according to one of claims 1 to 13, characterized in that a conveying device (16) for conveying the reference gas or the aerosol through the measuring channel arrangement (2) is provided, which is designed in particular as a blower or as a suction device, and that the delivery rate the conveyor device (16), in particular parameters for influencing the delivery rate, is adjustable.
    [15]
    15. A method for setting and / or function verification, in particular for adjusting or calibrating a condensation particle counter (1) or more identical condensation particle counter (1) using an arrangement according to one of the preceding claims, comprising the following steps: - conveying a reference gas flow (13) the measuring channel arrangement (2), wherein the reference gas is in particular particle-free or substantially particle-free reference gas such as air, ambient air or conditioned ambient air, - enriching or saturating the reference gas flow (13) with a fuel (18) in the saturation region (4) of the measuring channel arrangement (2) - oversaturating the reference gas stream (13) in the condensation zone (5) of the measuring channel arrangement (2), - separating and collecting fuel (12) condensed from the supersaturated reference gas stream (13) on the condensation element (8), and detecting dropwise from the latter Condensation element (8) delivered en operating material (12) in the measuring device (7).
    [16]
    16. Method according to claim 15, comprising the following steps: determining the frequency of the drops of fuel emitted by the condensation element (8) dropwise and detected by the measuring device (7), and adjusting the parameters of the saturation device (14), the condensation device (15) and / or the conveying device (16) until the detected frequency corresponds to a reference frequency or a reference frequency range.
    [17]
    17. The method according to claim 15 or 16, comprising the following steps: determining the droplet size (s) of the drops of droplets emitted by the condensation element (8) and detected by the measuring device (7), and adjusting the parameters of the saturation device (14), the condensation device (15) and / or the conveyor device (16) until the detected drop size corresponds to a reference drop size or a reference drop size range.
    [18]
    18. The method according to any one of claims 15 to 17, characterized in that for determining the reference frequency, the reference frequency range, the reference droplet size and / or the reference droplet size range, the following steps are performed: - Promote one, in particular by a particle generator, an ionizing radiation source and a differential Mobility analyzer generated by the Meßkanalanordnung (2) with removed condensation element (8), the Kalibrieraerosolstrom contains a known particle size and / or particle size, - Enrich or saturate the Kalibrieraerosolstroms with the fuel (18) in the saturation region (4) of the measuring channel arrangement (2 ), - oversaturating the calibrated aerosol flow in the condensation zone (5) of the measuring channel arrangement (2), adapting and determining the parameters of the saturation device (14), the condensation device (15) and / or the conveying device (16) until the v Values detected on the measuring device (7) correspond to a predetermined value or value range for the calibration, - stopping the conveyance of the calibrated aerosol flow, - attaching the condensation element (8) in the supersaturation region (9) of the measuring channel arrangement (2), - conveying a reference gas flow (13) by the measuring channel arrangement (2), wherein the reference gas is in particular particle-free or substantially particle-free reference gases such as air, ambient air or filtered ambient air and wherein the previously defined parameters of the saturation device (14), the condensation device (15) and / or the conveyor device (16) maintained - enriching or saturating the reference gas stream (13) with the fuel (18) in the saturation region (4) of the measuring channel arrangement (2), - supersaturating the reference gas stream (13) in the condensation region (5) of the measuring channel arrangement (2), - depositing and Collecting from the reference gas stream (13) condensed fuel (1 2) on the condensation element (8), detecting the fuel (12) delivered dropwise by the condensation element (8) in the measuring device (7), and determining or setting the reference frequency, the reference frequency range, the reference drop size or the reference drop size range.
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    同族专利:
    公开号 | 公开日
    AT519132B1|2018-04-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1102055A2|1999-11-18|2001-05-23|L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude|Method for counting the particles in a sample gas|
    WO2007015803A2|2005-07-29|2007-02-08|Horiba Instruments, Inc.|Wide range constant concentration particle generating system|
    WO2019231889A1|2018-05-29|2019-12-05|Tsi Incorporated|Condensation particle counter efficiency compensation for altitude|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA51030/2016A|AT519132B1|2016-11-14|2016-11-14|Arrangement and method for setting or functional testing of a condensation particle counter|ATA51030/2016A| AT519132B1|2016-11-14|2016-11-14|Arrangement and method for setting or functional testing of a condensation particle counter|
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