CN102323113A - Infrared heating voc gas sampling case - Google Patents
Infrared heating voc gas sampling case Download PDFInfo
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- CN102323113A CN102323113A CN201110274077A CN201110274077A CN102323113A CN 102323113 A CN102323113 A CN 102323113A CN 201110274077 A CN201110274077 A CN 201110274077A CN 201110274077 A CN201110274077 A CN 201110274077A CN 102323113 A CN102323113 A CN 102323113A
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- infrared heating
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Abstract
The invention discloses an infrared heating VOC gas sampling case, solves the technical problem of on-site sampling of organic volatile gas in places such as stadiums, plastic courses, and the like. The infrared heating VOC gas sampling case comprises a case body unit, a temperature sensor, a temperature control unit and a heating unit; the case body unit comprises a case 1 and a gas storing bag 6; the temperature sensor adopts a AD590 with good linearity or a NTC (negative temperature coefficient thermistor) or a thermocouple or other resistance-type temperature sensors; the temperature control unit comprises a single chip microcomputer and a peripheral circuit; the heating unit is an infrared heating lamp with a wavelength of the medium waveband. The infrared heating VOC gas sampling case can be fixed on a surface of an object to be measured. The infrared heating VOC gas sampling case disclosed by the invention can be carried into a venue to be sampled by personnel, performs on-site sampling of a surface of an object to be measured, and overcomes the disadvantage that traditional volatile gas sampling devices destroy objects to be measured.
Description
Technical field
The present invention relates to VOC gas sampling case, particularly a kind of sampling apparatus that is applicable at collection in worksite VOC gases such as outdoor, venues.
Technical background
Along with the raising that the aggravation of environmental pollution and people require quality of the life, the detection of objectionable impurities composition, content has become a ring indispensable in the modernized commodity production environment.Particularly organic, harmful gas has become requisite test item in the commercial quality check.
In test items such as gas composition analysis, smell test, need a kind of equipment and can carry out gas sampling.For example, in VOC (volatile organic matter) test, normally determinand is cut and be suitable size; Pack in the sack of special substance; Put into baking oven, the temperature baking a period of time with suitable, the VOC in the determinand is evaporate in the sack; Extract the gas in the sack then, process machine test on the sample.
This method belongs to and diminishes detection, need determinand be destroyed, and the product that is used for general batch process is suitable, but just seems for determinand large-scale, that can not destroy and to be difficult to meet the demands.For example, indoor sport venue, synthetic court etc. are carried out VOC detect, needing can be under the prerequisite of not destroying the place, the volatile organic matter of field ground surface is carried out collection in worksite at the scene.
Summary of the invention
To the problems referred to above, the invention provides a kind of can be at the Infrared Heating VOC gas sampling case of place spot samplings such as various stadiums, plastic cement race track.
The present invention solves the problems of the technologies described above the design proposal of being taked to be: a kind of Infrared Heating VOC gas sampling case; Be made up of box unit, temperature sensor, temperature conditioning unit, heating unit, it is characterized in that: its casing is the rule container of an opening; The temperature conditioning unit of said Infrared Heating VOC gas sampling case is made up of single-chip microcomputer and peripheral circuit; Be filled with heat preserving and insulating material between the described box unit inner and outer wall.
What heating unit adopted is that wavelength is the Infrared Heating fluorescent tube of medium-wave band.
Box unit is made up of casing and gas-storing bag.
What temperature sensor adopted is AD590 or NTC (negative tempperature coefficient thermistor) or thermopair.
Infrared Heating fluorescent tube top inner wall face is coated with reflectance coating.
Heating unit has 2-8 and props up the Infrared Heating fluorescent tube, equidistantly arranges at the box inside top.
The detailed process that the control of Infrared Heating VOC gas sampling oven temperature, is regulated is: power switch is opened work; Single-chip microcomputer electrification reset and program initialization; After operating personnel set the reference temperature parameter; Temperature sensor converts the voltage signal with the thermodynamics direct ratio with detecting the temperature current signal obtain in the VOC gas collecting case to through precision resistance, through a subtraction circuit, this thermodynamic temperature is converted into Celsius temperature again; Be right after OP07 then and form the form that forms voltage follow with circuit of penetrating, thereby improve the input impedance of signal and isolate with subordinate.
Then with this Celsius temperature signal through the A/D conversion, send into single-chip microcomputer after becoming digital signal; Single-chip microcomputer carries out difference relatively to the temperature information (Tx) that collects with reference temperature setting value (T0), if Tx＞T0 then exports control signal, makes all heating fluorescent tubes quit work; If Tx＜=T0; And calculate according to the difference that Tx deducts T0; Calculate and will keep the required heating power of T=T0 (the portion gas heat interchange is arranged inside and outside the casing), the heating power of regulating and controlling Infrared Heating fluorescent tube then, thus reach the purpose that keeps temperature stabilization in the casing.
Infrared Heating VOC gas sampling case provided by the present invention can carry out the scene of VOC, harmless sampling to determinand large-scale, that can not destroy, has avoided the destruction of traditional VOC sampling process to determinand.Carry the VOC sampling box to venue to be sampled by operating personnel, sampling box is covered on the surface of determinand, form seal cavity, wait the VOC of determinand slowly to get into gas storage space, extract test out and get final product.
Description of drawings
Fig. 1 is the synoptic diagram of Infrared Heating VOC gas collecting case;
Fig. 2 is the structured flowchart of Infrared Heating VOC gas collecting oven temperature, control system;
Mark among the figure: 1-casing, 2-gas valve, 3-gas conduit, 4-O-ring seal, 5-gas storage space, 6-gas-storing bag, 7-heating arrangement.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further explanation: that shown in Figure 1 is the present invention---a kind of Infrared Heating VOC gas sampling case, form by box unit, temperature sensor, temperature conditioning unit and heating unit.
In the present embodiment, its box unit is the rule container of a bottom surface opening, comprises casing 1 and gas-storing bag 6; Be filled with heat preserving and insulating material between said cabinet wall and the outer wall.The gas-storing bag 6 of an opening is arranged in the casing 1, and the opening part of gas-storing bag 6 is connected the opening part of casing 1, and the opening part of gas-storing bag 6 is connected has O-ring seal 4.During use, earlier O-ring seal 4 is packed in the seal groove of casing 1 opening part, then casing 1 is covered on the determinand surface, O-ring seal 4 and determinand surface combination form the gas storage space 5 of a sealing.In order to guarantee that the gas in the gas storage space 5 does not receive external interference; Gas-storing bag 6 should be selected the nothing volatilization for use; The material that chemical stability is high (as; Teflon) process, can not get into gas storage space 5 to guarantee other gaseous volatilization thing except that determinand VOC, and other gas not can with the inwall generation chemical reaction of gas storage space 5.
In the present embodiment, be designed with two gas valves 2 on the casing 1, gas valve 2 is connected with gas conduit 3, is communicated with gas storage space 5 with extraneous.Before carrying out the VOC sampling; Might clean gas storage space 5; The method of cleaning typically uses purging with nitrogen gas: the gas vent of nitrogen cylinder is connected on the gas valve 2 of VOC sampling box, opens the switch of two gas valves and nitrogen cylinder, nitrogen is got into from a gas valve; Flow out through gas storage space and from another gas valve, reach the purpose of cleaning gas storage space 5.Also can only use a gas valve 2, through charge into nitrogen-vacuumize-charge into nitrogen repeatedly the round-robin mode clean gas storage space 5.
In the present embodiment, heating tube 7 is selected for use is mounted in N (2～8) infrared heating pipe in the casing 1, and it is equidistantly installed and is arranged in casing 1 inside top, and a side of plated film is in the top, thereby makes being heated evenly of the face that is heated.Gas-storing bag 6 should use to be processed greater than 80% light transmissive material the infrared ray transmitance.The infrared ray that infrared heating pipe is sent sees through gas-storing bag 6, shines on the surface of determinand, and luminous energy is converted into heat energy, and the temperature of determinand is raise.
In the present embodiment, what the described temperature sensor of the temperature sensor of Infrared Heating VOC gas sampling case adopted is AD590 or NTC (negative tempperature coefficient thermistor) temperature sensor.
In the present embodiment, Infrared Heating VOC gas sampling case has temperature conditioning unit, and said temperature conditioning unit is made up of single-chip microcomputer and peripheral circuit.The effect of temperature conditioning unit is to make the interior space of sampling box maintain the temperature of initial setting.Begin before the heating, operating personnel set needed temperature through control panel; Single-chip microcomputer is given in the processing that the temperature signal that peripheral circuit collects temperature sensor is correlated with again; Single-chip microcomputer is used for the temperature data that temperature parameter in the casing and operating personnel preset is compared, and controls, regulates the power of Infrared Heating fluorescent tube according to comparative result, reaches the purpose of thermostat temperature control.
In the present embodiment, the detailed process that the control of Infrared Heating VOC gas sampling oven temperature, is regulated is: power switch is opened, the program initialization of single-chip microcomputer electrification reset, and operating personnel set the reference temperature parameter; Temperature sensor converts the voltage signal with the thermodynamics direct ratio with detecting the temperature current signal obtain in the VOC gas collecting case to through precision resistance; Through subtraction circuit, this thermodynamic temperature is converted into Celsius temperature again, is right after OP07 then and forms the form that forms voltage follow with circuit of penetrating, thereby improve the input impedance of signal and isolate with subordinate; Then with this Celsius temperature signal through the A/D conversion, send into single-chip microcomputer after becoming digital signal; Single-chip microcomputer carries out difference relatively to the temperature information (Tx) that collects with reference temperature setting value (T0), if Tx＞T0 then exports control signal, makes all Infrared Heating fluorescent tubes quit work; If Tx＜=T0, and calculate, calculate and will keep the required heating power of T=T0 (the portion gas heat interchange is arranged inside and outside the casing) according to the difference that Tx deducts T0, the heating power of regulating and controlling Infrared Heating fluorescent tube then, thus keep the stable of temperature in the casing.
The above; Be in order to practical implementation case of the present invention to be described; But be not in order to limit practical range of the present invention; Such as those skilled in the art must be covered by the scope of claim of the present invention not breaking away from all equivalence changes of being accomplished under indicated spirit of the present invention and the principle or modifying.
Claims (6)
1. an Infrared Heating VOC gas sampling case is made up of box unit, temperature sensor, temperature conditioning unit, heating unit, it is characterized in that: its casing is the rule container of an opening; The temperature conditioning unit of said Infrared Heating VOC gas sampling case is made up of single-chip microcomputer and peripheral circuit; Be filled with heat preserving and insulating material between the described box unit inner and outer wall.
2. Infrared Heating VOC gas sampling case according to claim 1 is characterized in that: what described heating unit adopted is that wavelength is the Infrared Heating fluorescent tube of medium-wave band.
3. Infrared Heating VOC gas sampling case according to claim 1, it is characterized in that: described box unit is made up of casing and gas-storing bag.
4. Infrared Heating VOC gas sampling case according to claim 1 is characterized in that: what described temperature sensor adopted is AD590 or NTC (negative tempperature coefficient thermistor) or thermopair.
5. Infrared Heating VOC gas sampling case according to claim 1 is characterized in that: said Infrared Heating fluorescent tube top inner wall face is coated with reflectance coating.
6. Infrared Heating VOC gas sampling case according to claim 1 is characterized in that: described heating unit has 2-8 and props up the Infrared Heating fluorescent tube, equidistantly arranges at the box inside top.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110274077A CN102323113A (en) | 2011-09-15 | 2011-09-15 | Infrared heating voc gas sampling case |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110274077A CN102323113A (en) | 2011-09-15 | 2011-09-15 | Infrared heating voc gas sampling case |
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| CN102323113A true CN102323113A (en) | 2012-01-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535376A (en) * | 2014-12-04 | 2015-04-22 | 苏州国环环境检测有限公司 | Gas collecting device |
| CN108918769A (en) * | 2018-05-18 | 2018-11-30 | 北京声迅电子股份有限公司 | A kind of hot volatilization device of trace measured object gas |
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| DE2347330A1 (en) * | 1973-09-20 | 1975-04-10 | Ruetgerswerke Ag | Extractor of unpolluted gas samples - from low pressure or overpressure lines or instruments has bag to hold samples |
| JPS60250227A (en) * | 1984-05-28 | 1985-12-10 | Hitachi Ltd | Test gas sampling apparatus |
| JP2005055336A (en) * | 2003-08-06 | 2005-03-03 | Atsuo Nozaki | Indoor chemical material measuring apparatus |
| CN2884202Y (en) * | 2006-03-20 | 2007-03-28 | 深港产学研基地 | Multi-functional aging test dry oven |
| CN101241117A (en) * | 2008-03-12 | 2008-08-13 | 福建师范大学 | Air cell for determining trunk respiration |
| JP2009128223A (en) * | 2007-11-26 | 2009-06-11 | Fujimori Kogyo Co Ltd | Gas collection bag |
| CN102062707A (en) * | 2009-11-13 | 2011-05-18 | 立邦涂料（中国）有限公司 | Method and device for measuring volatile harmful gas decomposing capability |
| CN202330096U (en) * | 2011-09-15 | 2012-07-11 | 深圳市华测检测技术股份有限公司 | Infrared heating VOC (volatile organic compounds) gas sampling chamber |
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2011
- 2011-09-15 CN CN201110274077A patent/CN102323113A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2347330A1 (en) * | 1973-09-20 | 1975-04-10 | Ruetgerswerke Ag | Extractor of unpolluted gas samples - from low pressure or overpressure lines or instruments has bag to hold samples |
| JPS60250227A (en) * | 1984-05-28 | 1985-12-10 | Hitachi Ltd | Test gas sampling apparatus |
| JP2005055336A (en) * | 2003-08-06 | 2005-03-03 | Atsuo Nozaki | Indoor chemical material measuring apparatus |
| CN2884202Y (en) * | 2006-03-20 | 2007-03-28 | 深港产学研基地 | Multi-functional aging test dry oven |
| JP2009128223A (en) * | 2007-11-26 | 2009-06-11 | Fujimori Kogyo Co Ltd | Gas collection bag |
| CN101241117A (en) * | 2008-03-12 | 2008-08-13 | 福建师范大学 | Air cell for determining trunk respiration |
| CN102062707A (en) * | 2009-11-13 | 2011-05-18 | 立邦涂料（中国）有限公司 | Method and device for measuring volatile harmful gas decomposing capability |
| CN202330096U (en) * | 2011-09-15 | 2012-07-11 | 深圳市华测检测技术股份有限公司 | Infrared heating VOC (volatile organic compounds) gas sampling chamber |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535376A (en) * | 2014-12-04 | 2015-04-22 | 苏州国环环境检测有限公司 | Gas collecting device |
| CN108918769A (en) * | 2018-05-18 | 2018-11-30 | 北京声迅电子股份有限公司 | A kind of hot volatilization device of trace measured object gas |
| CN108918769B (en) * | 2018-05-18 | 2022-10-25 | 北京声迅电子股份有限公司 | Trace measured object gas heat volatilization device |
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Application publication date: 20120118 |