CN202330096U - Infrared heating VOC (volatile organic compounds) gas sampling chamber - Google Patents
Infrared heating VOC (volatile organic compounds) gas sampling chamber Download PDFInfo
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- CN202330096U CN202330096U CN 201120346503 CN201120346503U CN202330096U CN 202330096 U CN202330096 U CN 202330096U CN 201120346503 CN201120346503 CN 201120346503 CN 201120346503 U CN201120346503 U CN 201120346503U CN 202330096 U CN202330096 U CN 202330096U
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Abstract
The utility model discloses an infrared heating VOC (volatile organic compounds) gas sampling chamber, which solves the technical problem of field sampling volatile organic compounds (VOC) of stadiums, plastic tracks and other fields. The infrared heating VOC gas sampling chamber consists of a chamber body unit, a temperature sensor, a temperature control unit and a heating unit, wherein the chamber body unit consists of a chamber body 1 and a gas storage bag 6; the temperature sensor adopts a AD590 or NTC (negative temperature coefficient) thermistor or a thermoelectric coupling or other resistance type temperature sensors with good linearity; the temperature control unit consists of a singlechip and a peripheral circuit; and the heating unit is an infrared heat lamp tube taking wavelength as a medium wave band. The infrared heating VOC sampling chamber can be fixed on the surface of an object to be detected. The infrared heating VOC gas sampling chamber disclosed by the utility model can be carried to a stadium to be sampled by an operator to perform field sampling to the surface of the object to be detected, so that the defect that a traditional volatile gas sampling device destroys the object to be detected can be overcome.
Description
Technical field
The utility model 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.
The utility model content
To the problems referred to above, the utility model provide 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 utility model is to solve 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.
The Infrared Heating VOC gas sampling case that the utility model provided 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 utility model is done further explanation: shown in Figure 1 is the utility model---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; It is practical implementation case in order to explanation the utility model; But be not in order to limit the practical range of the utility model; Such as those skilled in the art must be covered by the scope of the utility model claim not breaking away from all equivalence changes of being accomplished under indicated spirit of the utility model 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 negative tempperature coefficient thermistor or thermopair.
5. Infrared Heating VOC gas sampling case according to claim 2 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120346503 CN202330096U (en) | 2011-09-15 | 2011-09-15 | Infrared heating VOC (volatile organic compounds) gas sampling chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120346503 CN202330096U (en) | 2011-09-15 | 2011-09-15 | Infrared heating VOC (volatile organic compounds) gas sampling chamber |
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| Publication Number | Publication Date |
|---|---|
| CN202330096U true CN202330096U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120346503 Expired - Fee Related CN202330096U (en) | 2011-09-15 | 2011-09-15 | Infrared heating VOC (volatile organic compounds) gas sampling chamber |
Country Status (1)
| Country | Link |
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| CN (1) | CN202330096U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323113A (en) * | 2011-09-15 | 2012-01-18 | 深圳市华测检测技术股份有限公司 | Infrared heating voc gas sampling case |
-
2011
- 2011-09-15 CN CN 201120346503 patent/CN202330096U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323113A (en) * | 2011-09-15 | 2012-01-18 | 深圳市华测检测技术股份有限公司 | Infrared heating voc gas sampling case |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Suzhou Centre Testing International Corporation Assignor: Shenzhen Centre Testing Technology Co., Ltd. Contract record no.: 2013440020333 Denomination of utility model: Infrared heating VOC gas sampling case Granted publication date: 20120711 License type: Exclusive License Record date: 20131121 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20160915 |