WO2020000574A1 - 用于检测有害物质的蒸发密闭室 - Google Patents

用于检测有害物质的蒸发密闭室 Download PDF

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Publication number
WO2020000574A1
WO2020000574A1 PCT/CN2018/098218 CN2018098218W WO2020000574A1 WO 2020000574 A1 WO2020000574 A1 WO 2020000574A1 CN 2018098218 W CN2018098218 W CN 2018098218W WO 2020000574 A1 WO2020000574 A1 WO 2020000574A1
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WO
WIPO (PCT)
Prior art keywords
sealed chamber
harmful substances
evaporation
chamber
detecting harmful
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PCT/CN2018/098218
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English (en)
French (fr)
Inventor
夏可瑜
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东莞市升微机电设备科技有限公司
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Application filed by 东莞市升微机电设备科技有限公司 filed Critical 东莞市升微机电设备科技有限公司
Priority to JP2019556361A priority Critical patent/JP6782859B2/ja
Priority to EP18923761.3A priority patent/EP3633368B1/en
Priority to US16/625,801 priority patent/US11448573B2/en
Publication of WO2020000574A1 publication Critical patent/WO2020000574A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2226—Sampling from a closed space, e.g. food package, head space
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L1/00—Enclosures; Chambers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/40—Concentrating samples
    • G01N1/4022—Concentrating samples by thermal techniques; Phase changes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0011—Sample conditioning
    • G01N33/0014—Sample conditioning by eliminating a gas
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
    • G01N33/0047—Organic compounds
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0078—Testing material properties on manufactured objects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2226—Sampling from a closed space, e.g. food package, head space
    • G01N2001/2241—Sampling from a closed space, e.g. food package, head space purpose-built sampling enclosure for emissions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/40—Concentrating samples
    • G01N1/4022—Concentrating samples by thermal techniques; Phase changes
    • G01N2001/4027—Concentrating samples by thermal techniques; Phase changes evaporation leaving a concentrated sample

Definitions

  • the present invention relates to the technical field of closed chambers, and more particularly to an evaporation closed chamber for detecting harmful substances.
  • FIG. 3 shows a conventional evaporation sealed chamber, including a sealed chamber 100, an internal compensation bag 200, and an external compensation bag 300.
  • the internal compensation 200 bags pass through the bracket. It is fixedly installed in the sealed chamber 100 and is arranged above the inside of the sealed chamber 100.
  • the external compensation bag 300 communicates with the inside of the sealed chamber 100 through a pipe. Before the detection starts, the internal compensation bag 200 and the external compensation bag 300 are discharged.
  • the internal compensation bag 200 and the external compensation bag 300 will be compensated in time with the gas in the closed chamber 100 to prevent the contaminated gas in the closed room 100
  • the air pressure difference enters or exits the inside of the closed chamber 100 to improve the test accuracy.
  • the internal compensation bag 200 is set larger, and the internal compensation bag 200 is set larger, and needs to be fixed by a larger bracket, which causes internal compensation during sampling and detection. Certain harmful substances remain on the outside of the bag 200 and on the bracket, which affects the accuracy of the test.
  • gas enters the outside
  • it is difficult to clean the inside of the external compensation bag 300 which results in that harmful substances still cannot be discharged from the inside of the external compensation bag 300, which affects the accuracy of the test.
  • the purpose of the present invention is to overcome the above-mentioned shortcomings in the prior art, and provide an evaporation closed chamber for detecting harmful substances, which can prevent the external environment or other uncertain factors from affecting the test results, and can effectively improve the detection accuracy.
  • the present invention provides an evaporation sealed chamber for detecting harmful substances, including a sealed chamber and an air intake device, the air intake device is in communication with the interior of the closed chamber, and the closed chamber is connected with an exhaust pipe.
  • the sealed chamber is provided with a sampling port.
  • the sealed chamber is provided with a gas compensation device for compensating the gas volume inside the sealed chamber during the gas sampling process, and the gas compensation device is arranged on one or more sides of the sealed chamber.
  • the gas compensation device includes an orifice plate, a pressure plate, a driving device, and an elastic membrane.
  • the orifice plate is installed on any one or more sides of the closed chamber, and the elastic membrane is disposed on the outer side of the corresponding orifice plate.
  • the pressure plates are arranged on the outer side of the corresponding elastic film, and the driving device is drivingly connected with the corresponding pressure plate, thereby driving the pressure plate to move forward and backward, thereby pressing the elastic film to contact the orifice plate, and the air intake device includes A first fan or pump, filter and valve, the first fan or pump, filter and valve being in communication with the interior of the enclosed room.
  • the sealed outdoor cover is provided with a thermal insulation jacket, and the thermal insulation jacket is provided with a temperature control system.
  • a protective cover is provided on the outer surface of the gas compensation device, and the protective cover is provided on the outer surface of the pressure plate.
  • a closed door is provided on the closed room, and a temperature control or / and humidity control device is provided inside or outside the closed room.
  • a stirrer is provided in the closed chamber.
  • an inner wall of the closed chamber is provided with an anti-adsorption coating for preventing adsorption of harmful substances.
  • an exhaust valve is provided on the exhaust pipe.
  • the closed chamber is connected with an internal purification device, and the internal purification device includes a purification circuit, an air inlet valve, an air outlet valve, a purification filter, and a second fan.
  • the rooms are connected.
  • an intake valve and an intake flow meter are provided outside the closed chamber.
  • the elastic film is a fluoride elastic film.
  • the invention has a simple structure, and includes a sealed chamber and a gas compensation device for compensating the gas volume inside the sealed chamber during a gas sampling process.
  • the gas compensation device is arranged on one or more sides of the sealed chamber.
  • the gas compensation device includes an orifice plate. , Pressure plate, driving device and elastic film, the orifice plate is installed on any one or more sides of the closed chamber, the elastic film is provided on the outer surface of the corresponding orifice plate, and the pressure plate is provided on the outer surface of the corresponding elastic film. Driven by the corresponding pressure plate, so as to drive the pressure plate to move forward and backward, thereby pressing the elastic film to contact the orifice plate.
  • the elastic film bulges as the temperature of the closed chamber rises, and as the temperature decreases
  • the shrinkage allows the gas in the enclosed room to be compensated in time, and through the setting of the orifice plate, harmful substances are effectively prevented from remaining on the gas compensation device, which affects the accuracy of the test.
  • the overall structure is more simple to set up, effectively avoiding the external environment or other Determining factors affect the test results and improve the accuracy of the test.
  • FIG. 1 is a schematic diagram of the overall structure of an evaporation sealed chamber for detecting harmful substances provided by the present invention
  • FIG. 2 is a schematic diagram of a partial structure of an evaporation sealed chamber for detecting harmful substances provided by the present invention
  • FIG. 3 is a schematic diagram of the overall structure of a conventional evaporation sealed chamber provided by the present invention.
  • FIG. 4 is a schematic structural diagram of another evaporation closed chamber for detecting harmful substances provided by the present invention.
  • a first embodiment of the present invention provides an evaporation closed chamber for detecting harmful substances, including the closed chamber 1 and a gas volume compensation unit for the inside of the closed chamber 1 during a gas sampling process.
  • the gas compensation device 5 is disposed on one or more sides of the sealed chamber 1.
  • the gas compensation device 5 includes an orifice plate 6, a pressure plate 7, a driving device 8, and an elastic membrane 9.
  • the orifice plate 6 is installed in the sealed room.
  • the elastic film 9 is disposed on the outer surface of the corresponding orifice plate 6, the pressure plate 7 is disposed on the outer surface of the corresponding elastic plate 9, and the driving device 8 is drivingly connected to the corresponding pressure plate 7 to drive
  • the pressing plate 7 moves forward and backward, thereby pressing the elastic film 9 to contact the orifice plate 6, and this embodiment will be described in detail below with reference to the drawings.
  • the air inlet device 2 is in communication with the interior of the closed chamber 1.
  • the closed chamber 1 is connected to an exhaust pipe 3.
  • the closed chamber 1 is provided with a sampling port 4.
  • the closed chamber 1 is provided with a gas inlet.
  • the gas compensation device 5 is disposed on one or more sides of the closed chamber 1.
  • the gas compensation device 5 includes an orifice plate 6, a pressure plate 7, a driving device 8, and elasticity.
  • the membrane 9 and the orifice plate 6 are installed on any one or more sides of the closed chamber 1.
  • the elastic membrane 9 is disposed on the outer side of the corresponding orifice plate 6, the pressure plate 7 is disposed on the outer side of the corresponding elastic membrane 9, and the driving device 8 is drivingly connected to the corresponding pressure plate 7 so as to drive the pressure plate 7 to move forward and backward, thereby pressing the elastic film 9 to contact the orifice plate 6, and the elastic film 9 bulges as the temperature in the closed chamber 1 rises.
  • the reduction and shrinkage of the gas allows the gas in the confined chamber 1 to be compensated in time, and through the setting of the orifice plate 6, the aperture of the orifice plate 6 is set to a large aperture, which allows the gas in the confined chamber 1 to circulate freely and effectively avoid the residue of harmful substances
  • the gas compensation device 5 Precision, while the overall structure is arranged more simple, effective way to avoid the external environment or other uncertain factors affect the test results, to improve the accuracy of detection.
  • the air inlet device 2 includes a first fan or pump 16, a filter 17, and a valve 18.
  • the first fan or pump 16, the filter 17, and a valve 18 are connected in sequence, and communicate with the interior of the closed chamber 1.
  • the exhaust pipe 3 An exhaust valve 15 is provided on the upper side.
  • the first fan or pump 16 blows air into the enclosed room 1 to replace the air inside the enclosed room 1.
  • the valve 18 is closed to stop the inlet. Wind, close the exhaust valve 15 on the exhaust pipe 3, stop the air out, and complete the preparation work.
  • the original contaminated gas in the closed room 1 is discharged, and the closed room 1 Carry out air washing and air exchange, which provides a standard and stable testing environment for testing, and effectively guarantees testing accuracy.
  • the outer cover of the closed chamber 1 is provided with a thermal insulation jacket 10, and the thermal insulation jacket 10 is provided with a temperature control system.
  • the thermal insulation jacket 10 is provided with a temperature control system.
  • a protective cover 11 is provided on the outer surface of the gas compensation device 5, and the protective cover 11 is provided on the outer surface of the pressure plate 7 to prevent damage to the elastic film 9 and effectively ensure the service life of the device.
  • a hermetic chamber door 12 is provided on the hermetic chamber 1, and a temperature control or / and humidity control device 13 is provided inside or outside the hermetic chamber 1.
  • the temperature and humidity in 1 are adjusted to provide a stable test environment for the detection of harmful substances and improve the accuracy of the detection.
  • the agitator 14 is provided in the closed chamber 1, and the interior of the closed chamber 1 is set by the agitator 14 The gas is stirred well.
  • the inner wall of the closed chamber 1 is provided with an anti-adsorption coating for preventing the adsorption of harmful substances, which effectively prevents the harmful substances from being adsorbed on the inner wall of the closed chamber 1, thereby affecting the accuracy of the test.
  • the elastic film 9 is a fluoride elastic film.
  • the fluoride material may be polytetrafluoroethylene or other fluorides.
  • the compensation bag made of fluoride material can prevent volatile organic compounds from being adsorbed on the outer wall of the compensation bag, which improves the test accuracy.
  • the closed chamber 1 is connected with an internal purification device 19, which includes a purification circuit 20, an air inlet valve 21, an air outlet valve 22, a purification filter 23 and a second fan 24, an air inlet valve 21,
  • the air outlet valve 22, the purification filter 23, and the second fan 24 are sequentially connected through a purification circuit 20, and two ends of the purification circuit 20 are respectively connected to the closed chamber 1.
  • Evaporation sealed chamber for detecting harmful substances including the following detection steps:
  • the driving device 8 drives the pressure plate 7 to move, and compresses the elastic membrane 9 and the orifice plate 6 to control the internal temperature of the closed chamber 1 to be t1, and the internal volume of the closed chamber 1 is V1 at this time;
  • the internal temperature of the closed chamber 1 is controlled to run between t1 and t3.
  • the test article discharges pollutants into the closed chamber 1 between different temperature changes, and the concentration of the pollutants inside the closed chamber 1 is detected from the sampling port 4. , To obtain the pollutant discharge amount of the test product under the test state.
  • the polluted gas inside the closed chamber 1 is exhausted and replaced with clean gas before the test, which provides a clean and pollution-free test environment for the test and effectively improves the accuracy of the test.
  • the elastic film 9 changes with temperature. Changes in shrinkage or expansion provide gas compensation for the interior of the closed chamber 1 and effectively prevent outside contaminated gases from entering the interior of the closed chamber 1 due to the pressure difference, further improving the test accuracy.
  • the second embodiment of the present invention provides another evaporation sealed chamber for detecting harmful substances.
  • the outside of the sealed chamber 1 is provided with an air intake valve and an air flow meter.
  • the second embodiment of the present invention is used for
  • the structure of the evaporation sealed chamber for detecting harmful substances is mostly the same as that of the evaporation sealed chamber for detecting harmful substances in the first embodiment, and the same points are not described repeatedly.
  • an air intake valve 25 and an air intake flow meter 26 are provided on the outside of the closed chamber 1 to control the temperature of the closed chamber 1 to t1.
  • the volume of the closed chamber 1 is V1.
  • the intake air flow meter 26 controls the incoming air flow rate to (V2- V1)
  • the elastic membrane 9 expands, closes the intake valve 25, raises the internal temperature of the closed chamber 1 to t3, controls the internal temperature of the closed chamber 1 to run between t1 and t3, and the test article discharges pollutants to different temperature changes.
  • the concentration of pollutants in the closed chamber 1 is detected from the sampling port 4 to obtain the amount of pollutants that the test product wants in the test state.
  • the polluted gas inside the closed chamber 1 is exhausted and replaced with clean gas before the test, which provides a clean and pollution-free test environment for the test and effectively improves the accuracy of the test.
  • the elastic film 9 changes with temperature. Changes in shrinkage or expansion provide gas compensation for the interior of the closed chamber 1 and effectively prevent outside contaminated gases from entering the interior of the closed chamber 1 due to the pressure difference, further improving the test accuracy.
  • the present invention has a simple structure, and includes a closed chamber 1 and a gas compensation device 5 for compensating the gas volume inside the closed chamber 1 during the gas sampling process.
  • the gas compensation device 5 is provided on one or more sides of the closed chamber 1
  • the gas compensation device 5 includes an orifice plate 6, a pressure plate 7, a driving device 8, and an elastic membrane 9.
  • the orifice plate 6 is installed on any one or more sides of the closed chamber 1.
  • the elastic membrane 9 is provided on the corresponding orifice plate 6.
  • the pressure plate 7 is arranged on the outer surface of the corresponding elastic film 9, and the driving device 8 is drivingly connected to the corresponding pressure plate 7, so as to drive the forward and backward movement of the pressure plate 7, thereby pressing the elastic film 9 and the orifice plate 6 in phase.
  • the setting effectively prevents harmful substances from remaining on the gas compensation device 5 and affects the test accuracy.
  • the overall structure is simpler, which effectively avoids the impact of the external environment or other uncertain factors on the test results and improves the test results. Measurement accuracy.

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Abstract

一种用于检测有害物质的蒸发密闭室，包括密闭室（1）、孔板（6）、压板（7）、驱动装置（8）和弹性膜（9），孔板（6）装设在密闭室（1）的任意一面或多面上，弹性膜（9）设置在相应的孔板（6）的外侧面上，压板（7）设置在相应的弹性膜（9）的外侧面上，驱动装置（8）与相应的压板（7）传动连接，从而驱动压板（7）的前后运动，以此压紧弹性膜（9）与孔板（6）相接触。蒸发密闭室结构简单，通过弹性膜（9）的设置，弹性膜（9）随着密闭室（1）内温度的上升而鼓起，随着温度的下降而收缩，使得密闭室（1）内的气体能够及时得到补偿，且通过孔板（6）的设置，有效避免有害物质残留在气体补偿装置（5）上，影响测试精度，同时有效避免外界环境或其他不确定因素对检测结果造成影响，提高检测的精度。

Description

用于检测有害物质的蒸发密闭室 技术领域
本发明涉及密闭室技术领域，更具体地说，是涉及一种用于检测有害物质的蒸发密闭室。
背景技术
现有汽车中油箱、轮胎、汽车外饰、汽车底盘等部件都存在有害物质的挥发，当挥发性有害物质的浓度超过一定范围时，会对人体造成伤害，因此需要对汽车的有害物质进行收集检测。
目前，工业上存在许多对挥发性有害物质进行采样检测的系统，图3示出一种传统的蒸发密闭室，包括密闭室100、内部补偿袋200和外部补偿袋300，内部补偿200袋通过支架固定装设在密闭室100内，并设置在密闭室100的内部上方，外部补偿袋300通过管道与密闭室100内部相连通，检测开始前，排出内部补偿袋200和外部补偿袋300中的部分或全部气体，检测过程中，内部补偿袋200和外部补偿袋300随着密闭室100内部气体的减小或增大，对密闭室100内部进行及时的气体补偿，防止密闭室外100的污染气体因气压差进入或排出密闭室100内部，提高测试精度，然而，通过内部补偿袋200的设置，内部补偿袋200设置较大，且需要通过较大的支架进行固定，导致采样检测时，在内部补偿袋200的外部及支架上残留一定的有害物质，影响测试的精度，同时，采样检测时，气体进入外部补偿袋300内，然而外部补偿袋300的内部不易清理干净，导致外部补偿袋300内部仍然残留有害物质无法排出，以此而影响测试的精度。
发明内容
本发明的目的在于克服现有技术中的上述缺陷，提供一种能够避免外界环境或其他不确定因素对测试结果造成影响，从而能有效提高检测精度的用于检测有害物质的蒸发密闭室。
为实现上述目的，本发明提供了一种用于检测有害物质的蒸发密闭室，包括密闭室和进气装置，所述进气装置与密闭室内部相连通，所述密闭室连接有排气管道，所述密闭室上开设有采样口，所述密闭室上设置有用于在气体采样过程中对密闭室内部进行气体容积补偿的气体补偿装置，所述气体补偿装置设置在密闭室的一面或多面上，所述气体补偿装置包括孔板、压板、驱动装置和弹性膜，所述孔板装设在密闭室的任意一面或多面上，所述弹性膜设置在相应的孔板的外侧面上，所述压板设置在相应的弹性膜的外侧面上，所述驱动装置与相应的压板传动连接，从而驱动压板的前后运动，以此压紧弹性膜与孔板相接触，所述进气装置包括第一风机或泵、过滤器和阀门，所述第一风机或泵、过滤器和阀门与密闭室内部相连通。
作为优选的，所述密闭室外罩设有保温夹套，所述保温夹套设置有控温系统。
作为优选的，所述气体补偿装置的外侧面上罩设有保护罩，所述保护罩罩设在压板的外侧面上。
作为优选的，所述密闭室上设置有密闭舱门，所述密闭室内部或外部设置有控温或/和控湿装置。
作为优选的，所述密闭室内设置有搅拌器。
作为优选的，所述密闭室的内壁设有用于防止有害物质吸附的防吸附 涂层。
作为优选的，所述排气管道上设置有排气阀门。
作为优选的，所述密闭室连接有内部净化装置，所述内部净化装置包括净化回路、进气口阀门、出气口阀门、净化过滤器和第二风机，所述净化回路的两端分别与密闭室相连接。
作为优选的，所述密闭室的外部设置有进气阀门及进气流量计。
作为优选的，所述弹性膜设置为氟化物弹性膜。
与现有技术相比，本发明的有益效果在于：
本发明结构简单，包括密闭室和用于在气体采样过程中对密闭室内部进行气体容积补偿的气体补偿装置，气体补偿装置设置在密闭室的一面或多面上，其中，气体补偿装置包括孔板、压板、驱动装置和弹性膜，孔板装设在密闭室的任意一面或多面上，弹性膜设置在相应的孔板的外侧面上，压板设置在相应的弹性膜的外侧面上，驱动装置与相应的压板传动连接，从而驱动压板的前后运动，以此压紧弹性膜与孔板相接触，通过弹性膜的设置，弹性膜随着密闭室温度的上升而鼓起，随着温度的下降而收缩，使得密闭室内的气体能够及时得到补偿，且通过孔板的设置，有效避免有害物质残留在气体补偿装置上，影响测试精度，同时，整体结构设置更加简单，有效避免外界环境或其他不确定因素对检测结果造成影响，提高检测的精度。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来 讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明提供的用于检测有害物质的蒸发密闭室的整体结构示意图；
图2是本发明提供的用于检测有害物质的蒸发密闭室的局部结构示意图；
图3是本发明提供的传统的蒸发密闭室的整体结构示意图；
图4是本发明提供的另一种用于检测有害物质的蒸发密闭室的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例一
请参考图1和图2，本发明的实施例一提供了一种用于检测有害物质的蒸发密闭室，包括密闭室1和用于在气体采样过程中对密闭室1内部进行气体容积补偿的气体补偿装置5，气体补偿装置5设置在密闭室1的一面或多面上，其中，气体补偿装置5包括孔板6、压板7、驱动装置8和弹性膜9，孔板6装设在密闭室1的任意一面或多面上，弹性膜9设置在相应的孔板6的外侧面上，压板7设置在相应的弹性膜9的外侧面上，驱动装置8与相应的压板7传动连接，从而驱动压板7的前后运动，以此压紧弹性膜9与孔板6相接触，下面结合附图对本实施例进行详细说明。
如图1和图2所示，进气装置2与密闭室1内部相联通，密闭室1连接有排气管道3，密闭室1上开设有采样口4，密闭室1上设置有用于在气体采样过程中对密闭室1内部进行气体容积补偿的气体补偿装置5，气体补偿装置5设置在密闭室1的一面或多面上，气体补偿装置5包括孔板6、压板7、驱动装置8和弹性膜9，孔板6装设在密闭室1的任意一面或多面上，弹性膜9设置在相应的孔板6的外侧面上，压板7设置在相应的弹性膜9的外侧面上，驱动装置8与相应的压板7传动连接，从而驱动压板7的前后运动，以此压紧弹性膜9与孔板6相接触，弹性膜9随着密闭室1内温度的上升而鼓起，随着温度的下降而收缩，使得密闭室1内的气体能够及时得到补偿，且通过孔板6的设置，孔板6上孔径设置为大孔径，可供密闭室1内气体自由流通，有效避免有害物质残留在气体补偿装置5上，影响测试精度，同时，整体结构设置更加简单，有效避免外界环境或其他不确定因素对检测结果造成影响，提高检测的精度。
其中，进气装置2包括第一风机或泵16、过滤器17和阀门18，第一风机或泵16、过滤器17和阀门18依次连接，并与密闭室1内部相连通，排气管道3上设置有排气阀门15，测试开始前的准备工作中，第一风机或泵16往密闭室1内部进行吹风，将密闭室1内部的空气重新置换，换风完成后，关闭阀门18停止进风，关闭排气管道3上的排气阀门15，停止出风，完成准备工作，通过在检测开始前往密闭室1内通入洁净气体，排出密闭室1内原有的污染气体，对密闭室1进行洗气和换气，为检测提供了个标准稳定的测试环境，有效保证检测精度。
较佳地，密闭室1外罩设有保温夹套10，保温夹套10设置有控温系统，通过保温夹套10的设置，有效保持密闭室1的温度，保证检测的精 度。
较佳地，气体补偿装置5的外侧面上罩设有保护罩11，保护罩11罩设在压板7的外侧面上，避免弹性膜9发生损坏，有效保证设备的使用寿命。
本实施例中，密闭室1上设置有密闭舱门12，密闭室1内部或外部设置有控温或/和控湿装置13，通过控温或/和控湿装置13的设置，对密闭室1内的温度和湿度进行调节，为有害物质的检测提供一个稳定的测试环境，提高检测的精度，其中，密闭室1内设置有搅拌器14，通过搅拌器14的设置，将密闭室1内部的气体搅拌均匀。
较佳地，密闭室1的内壁设有用于防止有害物质吸附的防吸附涂层，有效防止有害物质吸附在密闭室1的内壁上，从而影响测试的精度。
较佳地，弹性膜9设置为氟化物弹性膜，具体的，该氟化物材料可以为聚四氟乙烯或其他氟化物。其中，由氟化物材料制成的补偿袋能够防止补偿袋的外壁吸附挥发性有机物，提高了测试精度。
较佳地，密闭室1连接有内部净化装置19，内部净化装置19包括净化回路20、进气口阀门21、出气口阀门22、净化过滤器23和第二风机24，进气口阀门21、出气口阀门22、净化过滤器23和第二风机24通过净化回路20依次连接，净化回路20的两端分别与密闭室1相连接。
用于检测有害物质的蒸发密闭室，包括以下检测步骤：
(1)开启排气阀门15，运行第一风机或泵16和阀门18，外部空气经过过滤器17进行过滤，进入密闭室1内部，将密闭室1内部污染气体置换为洁净气体，同时，可打开密闭室1内部的搅拌器14，并打开控温或/和控湿装置13；
(2)将试验品放入密闭室1内，内部净化装置19运行，清洁密闭室1；
(3)关闭内部净化装置19，关闭进气口阀门21或/和出气口阀门22；
(4)驱动装置8驱动压板7运动，将弹性膜9与孔板6相压紧，控制密闭室1内部温度为t1，此时密闭室1内部容积为V1；
(5)驱动装置8复位，将密闭室1内部温度升高至t2，弹性膜9发生膨胀，此时密闭室1内部容积为V2＝(273+T2)/(273+T1)*V1；
(6)将密闭室1内部温度继续升高至t3，弹性膜9继续膨胀，此时密闭室1容积为V3＝(273+T3)/(273+T1)*V1；
(7)调节完成后，控制密闭室1内部温度在t1至t3之间运行，试验品在不同温度变化间将污染物排放到密闭室1内，从采样口4检测密闭室1内部污染物浓度，得到试验品在试验状态下的污染物的排放量。
以此实现在测试前将密闭室1内部的污染气体排出，置换为洁净气体，为测试提供一个干净无污染的测试环境，有效提高测试的精度，在采样过程中，弹性膜9随着温度的变化收缩或膨胀，为密闭室1内部提供气体补偿，有效防止外界污染气体因气压差进入密闭室1内部，进一步提高测试的精度。
实施例二
如图4所示，本发明实施例二提供了另一种用于检测有害物质的蒸发密闭室，密闭室1的外部设置有进气阀门及进气流量计，本发明实施例二的用于检测有害物质的蒸发密闭室与上述实施例一的用于检测有害物质的蒸发密闭室的结构大部分相同，相同之处不再赘述。
本实施例中，密闭室1的外部设置有进气阀门25及进气流量计26， 控制密闭室1温度为t1，此时密闭室1容积为V1，当驱动装置8复位后，关闭除进气阀门25以外的阀门，密闭室1内部温度上升至t2，密闭室1容积为V2＝(273+T2)/(273+T1)*V1，进气流量计26控制进入空气流量为(V2-V1)弹性膜9发生膨胀，关闭进气阀门25，将密闭室1内部温度上升至t3，控制密闭室1内部温度在t1至t3之间运行，试验品在不同温度变化间将污染物排放到密闭室1内，从采样口4检测密闭室1内部污染物浓度，得到试验品在试验状态想的污染物的排放量。
以此实现在测试前将密闭室1内部的污染气体排出，置换为洁净气体，为测试提供一个干净无污染的测试环境，有效提高测试的精度，在采样过程中，弹性膜9随着温度的变化收缩或膨胀，为密闭室1内部提供气体补偿，有效防止外界污染气体因气压差进入密闭室1内部，进一步提高测试的精度。
综上所述，本发明结构简单，包括密闭室1和用于在气体采样过程中对密闭室1内部进行气体容积补偿的气体补偿装置5，气体补偿装置5设置在密闭室1的一面或多面上，其中，气体补偿装置5包括孔板6、压板7、驱动装置8和弹性膜9，孔板6装设在密闭室1的任意一面或多面上，弹性膜9设置在相应的孔板6的外侧面上，压板7设置在相应的弹性膜9的外侧面上，驱动装置8与相应的压板7传动连接，从而驱动压板7的前后运动，以此压紧弹性膜9与孔板6相接触，通过弹性膜9的设置，弹性膜9随着密闭室1内温度的上升而鼓起，随着温度的下降而收缩，使得密闭室1内的气体能够及时得到补偿，且通过孔板6的设置，有效避免有害物质残留在气体补偿装置5上，影响测试精度，同时，整体结构设置更加简单，有效避免外界环境或其他不确定因素对检测结果造成影响，提高检 测的精度。
上述实施例为本发明较佳的实施方式，但本发明的实施方式并不受上述实施例的限制，其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均应为等效的置换方式，都包含在本发明的保护范围之内。

Claims (10)

  1. 一种用于检测有害物质的蒸发密闭室，包括密闭室(1)和进气装置(2)，所述进气装置(2)与密闭室(1)内部相连通，所述密闭室(1)连接有排气管道(3)，所述密闭室(1)上开设有采样口(4)，其特征在于：所述密闭室(1)上设置有用于在气体采样过程中对密闭室(1)内部进行气体容积补偿的气体补偿装置(5)，所述气体补偿装置(5)设置在密闭室(1)的一面或多面上，所述气体补偿装置(5)包括孔板(6)、压板(7)、驱动装置(8)和弹性膜(9)，所述孔板(6)装设在密闭室(1)的任意一面或多面上，所述弹性膜(9)设置在相应的孔板(6)的外侧面上，所述压板(7)设置在相应的弹性膜(9)的外侧面上，所述驱动装置(8)与相应的压板(7)传动连接，从而驱动压板(7)的前后运动，以此压紧弹性膜(9)与孔板(7)相接触，所述进气装置(2)包括第一风机或泵(16)、过滤器(17)和阀门(18)，所述第一风机或泵(16)、过滤器(17)和阀门(18)与密闭室(1)内部相连通。
  2. 根据权利要求1所述的用于检测有害物质的蒸发密闭室，其特征在于：所述密闭室(1)外罩设有保温夹套(10)，所述保温夹套(10)设置有控温系统。
  3. 根据权利要求1所述的用于检测有害物质的蒸发密闭室，其特征在于：所述气体补偿装置(5)的外侧面上罩设有保护罩(11)，所述保护罩(11)罩设在压板(7)的外侧面上。
  4. 根据权利要求1所述的用于检测有害物质的蒸发密闭室，其特征在于：所述密闭室(1)上设置有密闭舱门(12)，所述密闭室(1)内部 或外部设置有控温或/和控湿装置(13)。
  5. 根据权利要求1所述的用于检测有害物质的蒸发密闭室，其特征在于：所述密闭室(1)内设置有搅拌器(14)。
  6. 根据权利要求1所述的用于检测有害物质的蒸发密闭室，其特征在于：所述密闭室(1)的内壁设有用于防止有害物质吸附的防吸附涂层。
  7. 根据权利要求1所述的用于检测有害物质的蒸发密闭室，其特征在于：所述排气管道(3)上设置有排气阀门(15)。
  8. 根据权利要求1所述的用于检测有害物质的蒸发密闭室，其特征在于：所述密闭室(1)连接有内部净化装置(19)，所述内部净化装置(19)包括净化回路(20)、进气口阀门(21)、出气口阀门(22)、净化过滤器(23)和第二风机(24)，所述净化回路(20)的两端分别与密闭室(1)相连接。
  9. 根据权利要求1所述的用于检测有害物质的蒸发密闭室，其特征在于：所述密闭室(1)的外部设置有进气阀门(25)及进气流量计(26)。
  10. 根据权利要求1所述的用于检测有害物质的蒸发密闭室，其特征在于：所述弹性膜(9)设置为氟化物弹性膜。
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