CN208224209U - A kind of portable detector of detection object volatile organic gas rate of release - Google Patents
A kind of portable detector of detection object volatile organic gas rate of release Download PDFInfo
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- CN208224209U CN208224209U CN201820793920.7U CN201820793920U CN208224209U CN 208224209 U CN208224209 U CN 208224209U CN 201820793920 U CN201820793920 U CN 201820793920U CN 208224209 U CN208224209 U CN 208224209U
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Abstract
The utility model relates to a kind of portable detectors of detection object volatile organic gas rate of release, including shell, one end of the shell has half isolation detection chamber being recessed inwardly, the test chamber is fixedly connected with the shell or is an entirety, gas-sensing element is provided on the inner wall of the test chamber, the endface of the test chamber is equipped with the stainless steel mesh enclosure for protecting the gas-sensing element, the interior of shell is additionally provided with switch, data processor and power supply unit, the gas-sensing element is electrically connected with the data processor, the data processor is electrically connected with the switch and power supply unit, by the test chamber that half isolation structure is arranged, test chamber contents sensing element, test chamber can be contacted directly with testee, closed housing is formed with testee surface, for testing appointed product surface TVOC rate of gas release can help consumer to judge whether product is up to standard or find indoor TVOC gaseous contamination source.
Description
Technical field
The utility model relates to a kind of portable detectors of detection object volatile organic gas rate of release.
Background technique
It is increasingly grown with living-pattern preservation, the time of people indoors with the continuous improvement of living standards, it is indoor
The superiority and inferiority of air quality directly influences the health of people.There are many factors for influencing indoor air quality, wherein extremely
Important one kind is volatile organic matter gas (english abbreviation VOCs), because VOCs gas componant is complicated, including benzene homologues,
Organic chloride, freon series, organic ketone, amine, alcohol, ether, ester, acid and petroleum hydrocarbon compound etc., individually to every kind of substance into
Row detection technique difficulty and cost of implementation are all very high, it is difficult to realize, metal-oxide semiconductor gas sensor is actually mostly used
It detects total volatile organism (english abbreviation TVOC).Toxicity, irritation, carcinogenicity and special odor profiles, the meeting shadow of TVOC
Skin and mucous membrane are rung, acute lesion is generated to human body.Director studies in the World Health Organization (WHO), National Academy of Sciences/country
The mechanisms such as meeting (NAS/NRC) emphasize that always TVOC is a kind of important air pollutants.
The main source of indoor TVOC, in addition to the discharge of human body itself, the combustion product of fuel such as coal-fired or natural gas and
Outside the smog of the cooking, most of plate, adhesive, coating, wallpaper etc. in interior architecture and ornament materials, these products
No matter quality, can nearly all discharge TVOC, difference is that the rate of release of qualified products is very low, in normal venting ring
Under border, indoor TVOC concentration over-standard not will cause, and substandard product meeting excess discharges TVOC gas, and TVOC concentration is caused to rise
It is exceeded, seriously affect indoor air quality.Nowadays product category is various in the market, and quality is very different, once buy bad factory
The substandard product of family's production, these rejected products continuously excess will discharge TVOC, cause indoor TVOC concentration super
Mark, in this environment, people's health will will receive grievous injury for long-term life.
Gas detecting instrument currently on the market, can only detect the TVOC concentration in certain space, for example, in detection wardrobe or
TVOC concentration in person room, and for wallpaper, curtain, desk these cannot form the product of confined space, will be unable to test
Its TVOC rate of release.Therefore, it is whether genuine qualified can not to judge bought product TVOC rate of release by consumer, and works as
It was found that can not also determine specific pollution sources when interior TVOC is exceeded, this pairing method right-safeguarding and improvement indoor air quality are all
One very big obstacle.
Utility model content
The utility model for the technical problems in the prior art, provides a kind of new structural Portable gas physical examination
Instrument is surveyed, this new structural portable detector not only can detecte indoor TVOC concentration, can also test appointed product table
The TVOC rate of gas release in face, so that consumer be helped to judge whether product quality reaches environmental protection standard or find interior
TVOC gaseous contamination source.
The technical solution that the utility model solves above-mentioned technical problem is as follows: a kind of detection object volatile organic gas
The portable detector of rate of release, including shell, one end of the shell has half isolation detection chamber being recessed inwardly, described
Test chamber is fixedly connected with the shell or is an entirety, is provided with gas-sensing element on the inner wall of the test chamber, institute
The endface for stating test chamber is equipped with the stainless steel mesh enclosure for protecting the gas-sensing element, the interior of shell be additionally provided with switch,
Data processor and power supply unit, the gas-sensing element are electrically connected with the data processor, the data processor with
The switch and power supply unit electrical connection, gas-sensing element can sense in real time in cavity volatile organic matter gas concentration and
Variation, data processor obtains volatile organic matter gas concentration climbing speed, and assesses the safety of object.
Display screen is additionally provided on the shell, the display screen is electrically connected with the data processor, and display screen is used for
Show test result and assessment result.
Mode switch button is additionally provided on the shell, the mode switch button is electrically connected with the data processor
It connects, corresponding measuring accuracy can choose by mode switch button.
Preferably, use metal material, ceramics or other VOC frees s gaseous volatilization material inside test chamber, detector other
Part should also use low VOCs gaseous volatilization material, to exclude influence of the detector to test result itself.
Preferably, half isolation structure of test chamber is bowl-shape, horn-like or tubulose, and the area of opening is about 30cm2's
Round, ellipse or rectangular, opening can reach preferable fit-state with object under test surface to form closed housing.
Further, the ratio between the cavity volume of the test chamber and test chamber opening area are less than 5.01cm, if desired mention
It is highly sensitive, it is preferred to use conical structure, as far as possible increase opening area, and reduce cavity volume, to reduce the ratio.
The beneficial effects of the utility model are:
1) by the way that the test chamber of half isolation structure is arranged, it is provided with gas-sensing element in test chamber, test chamber can be direct
It is contacted with testee, forms closed housing with testee surface, the TVOC gas for testing appointed product surface discharges
Rate can help consumer to judge whether product is up to standard or find indoor TVOC gaseous contamination source.
2) apparatus structure is simple, small in size, and high reliablity is practical, without using external power supply, is convenient for user
It carries and operates.
Detailed description of the invention
Fig. 1 be the utility model relates to the portable detector cylindrical conformation schematic diagram；
Fig. 2 be the utility model relates to the portable detector cylindrical conformation diagrammatic cross-section；
Fig. 3 be the utility model relates to the portable detector cubic morphology schematic diagram；
Fig. 4 be the utility model relates to the portable detector cubic morphology diagrammatic cross-section.
In attached drawing, parts list represented by the reference numerals are as follows:
1, shell, 2, test chamber, 3, stainless steel mesh enclosure, 4, display screen, 5, switch, 6, mode switch button, 7, gas sense
Survey element, 8, data processor, 9, power supply unit.
Specific embodiment
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical
It is novel, it is not intended to limit the scope of the utility model.
Embodiment 1
As shown in Figs. 1-2, a kind of portable detector of detection object volatile organic gas rate of release, including circle
The shell 1 of tubular, one end of the shell 1 have half isolation detection chamber 2 being recessed inwardly, the test chamber 2 and the shell 1
It is fixedly connected or for an entirety, is provided with gas-sensing element 7, the end face of the test chamber 2 on the inner wall of the test chamber 2
Place is equipped with the stainless steel mesh enclosure 3 for protecting the gas-sensing element, is additionally provided with switch 5, data processor 8 inside the shell 1
And power supply unit 9, the gas-sensing element 7 are electrically connected with the data processor 8, the data processor 8 is opened with described
5 and the electrical connection of power supply unit 9 are closed, gas-sensing element 7 can sense volatile organic matter gas concentration and change in cavity in real time
Change, data processor 8 obtains volatile organic matter gas concentration climbing speed, and assesses the safety of object.
Display screen 4 is additionally provided on the shell 1, the display screen 4 is electrically connected with the data processor 8, display screen 4
For showing test result and assessment result.
Mode switch button 6, the mode switch button 6 and 8 electricity of data processor are additionally provided on the shell 1
Connection, can choose corresponding measuring accuracy by mode switch button 6.
Embodiment 2
As shown in Figure 3-4, a kind of portable detector of detection object volatile organic gas rate of release, including it is vertical
The shell 1 of cube type, one end of the shell 1 have a half isolation detection chamber 2 being recessed inwardly, the test chamber 2 with it is described outer
Shell 1 is fixedly connected or is an entirety, is provided with gas-sensing element 7 on the inner wall of the test chamber 2, the test chamber 2
Endface is equipped with the stainless steel mesh enclosure 3 for protecting the gas-sensing element, is additionally provided with switch 5, data processing inside the shell 1
Device 8 and power supply unit 9, the gas-sensing element 7 are electrically connected with the data processor 8, the data processor 8 with it is described
Switch 5 and power supply unit 9 are electrically connected, gas-sensing element 7 can sense in real time in cavity volatile organic matter gas concentration and
Variation, data processor 8 obtains volatile organic matter gas concentration climbing speed, and assesses the safety of object.
Display screen 4 is additionally provided on the shell 1, the display screen 4 is electrically connected with the data processor 8, display screen 4
For showing test result and assessment result.
Mode switch button 6, the mode switch button 6 and 8 electricity of data processor are additionally provided on the shell 1
Connection, can choose corresponding measuring accuracy by mode switch button 6.
Preferably, test chamber 2 is using metal material, ceramics or other VOC frees s gaseous volatilization material, other portions of detector
Low VOCs gaseous volatilization material should also be used by dividing, to exclude influence of the detector to test result itself.
Preferably, half isolation structure of test chamber 2 is bowl-shape, horn-like or tubulose, and the area of opening is about 30cm2's
Round, ellipse or rectangular, opening can reach preferable fit-state with object under test surface to form closed housing.
Further, the ratio between the cavity volume of the test chamber 2 and 2 opening area of test chamber are less than 5.01cm, if desired
Improve sensitivity, it is preferred to use conical structure, as far as possible increase opening area, and reduce cavity volume, to reduce the ratio.
Formaldehyde is gas of greatest concern in TVOC, therefore for testing plate formaldehyde gas rate of release, to the design
It is described further:
Even unqualified plate, the rate of plate release formaldehyde per second is still very slow, and the detectivity of sensor
There is minimum limitation, it is therefore desirable to design the structure of test chamber in conjunction with the detection limit of detector, the excellent of plate can be differentiated
It is bad.
If test chamber opening area is S, test chamber cavity volume is V, and plate Form aldehyde release rate is Vg, and test is taken
Between be t, the minimum formaldehyde mass concentration Cm (mg/m that chip can detect3), according to both at home and abroad to indoor decorating and refurnishing materials people
Make the limitation of Form aldehyde release Limited Doses in plate and its product, qualified plate Form aldehyde release speed Vg≤60ug/m2H=1.67 × 10-5mg/m2s。
To meet testing requirement, then:
CmV < SVgt, i.e.,
According to existing transducer sensitivity, the concentration of formaldehyde Cm=0.01mg/m that can detect3,
If desired test is completed in 30s, then t=30s,
Therefore preferably, the ratio between test chamber cavity volume and test chamber opening area are less than 5.01cm, if desired enough spirits
Quick or raising test speed, it is preferred to use conical structure, as far as possible increase opening area, and reduce cavity volume.
When selecting the gas sensing original part of different sensitivity, the design of test chamber should meet a cassation relationship.
Processing for test data, referring to following equation:
CmV=SVgt, i.e.,
Cm is the concentration of formaldehyde obtained by data processor, has proportional relation with t, is waited after a period of time, Vg
When can reach stable, corresponding data can be obtained.
The utility model relates to the portable detector usage mode it is as follows:
When needing using detector, it will test instrument and be put at outdoor clean air, turn on the switch 5, according to testing requirement,
Corresponding measuring accuracy is selected by mode switch button 6, then preheating is waited to terminate.If selecting general precision test, preheating
3mi n is needed to wait for, if selection high precision measurement, preheating need to wait for 10min.After preheating, then mode selecting key 6 is pressed,
Select conventional chambers air detection mode or material TVOC rate of release detection pattern:
If 1) select conventional chambers air detection mode, the detector after preheating is taken into interior, is put into needs
In the room or cabinet of detection, 10~20s is waited, until detector registration kept stable, then 4 institute of read screen
The result of display；
If 2) select material TVOC rate of release detection pattern, detection required for the opening contact of instrument test chamber 2 will test
Body surface, as far as possible guarantee test chamber open edge and body surface completely attach to, then wait 5~10s, read test
Instrument shows result.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (7)
1. a kind of portable detector of detection object volatile organic gas rate of release, including shell (1), feature exists
In one end of the shell (1) has half isolation detection chamber (2) being recessed inwardly, and is provided on the inner wall of the test chamber (2)
Gas-sensing element (7), the shell (1) is internal to be additionally provided with data processor (8) and power supply unit (9), the data processing
Device (8) is electrically connected with the gas-sensing element (7) and power supply unit (9) respectively.
2. a kind of portable detector of detection object volatile organic gas rate of release according to claim 1,
It is characterized by: the endface of the test chamber (2) is equipped with the stainless steel mesh enclosure (3) for protecting the gas-sensing element (7).
3. a kind of portable detector of detection object volatile organic gas rate of release according to claim 1,
It is characterized by: being additionally provided with display screen (4) on the shell (1), the display screen (4) and the data processor (8) electricity
Connection.
4. a kind of portable detector of detection object volatile organic gas rate of release according to claim 1,
It is characterized by: being additionally provided with switch (5) on the shell (1), the switch (5) is electrically connected with the data processor (8).
5. a kind of portable detector of detection object volatile organic gas rate of release according to claim 1,
It is characterized by: being additionally provided with mode switch button (6) on the shell (1), the mode switch button (6) and the data
Processor (8) electrical connection.
6. a kind of portable detector of detection object volatile organic gas rate of release according to claim 1,
It is characterized by: the shell (1) is integrally formed or is fixedly connected with the test chamber (2).
7. a kind of detection object volatile organic gas rate of release described in any one of -6 is just according to claim 1
Take formula detector, it is characterised in that: the ratio between the hollow volume of test chamber (2) and opening area are not more than 5.01cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820793920.7U CN208224209U (en) | 2018-05-25 | 2018-05-25 | A kind of portable detector of detection object volatile organic gas rate of release |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820793920.7U CN208224209U (en) | 2018-05-25 | 2018-05-25 | A kind of portable detector of detection object volatile organic gas rate of release |
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| Publication Number | Publication Date |
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| CN208224209U true CN208224209U (en) | 2018-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820793920.7U Active CN208224209U (en) | 2018-05-25 | 2018-05-25 | A kind of portable detector of detection object volatile organic gas rate of release |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236058A (en) * | 2021-12-21 | 2022-03-25 | 杭州麦乐克科技股份有限公司 | Method for detecting volatilization rate of harmful volatile gas in object at low temperature |
-
2018
- 2018-05-25 CN CN201820793920.7U patent/CN208224209U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236058A (en) * | 2021-12-21 | 2022-03-25 | 杭州麦乐克科技股份有限公司 | Method for detecting volatilization rate of harmful volatile gas in object at low temperature |
| CN114236058B (en) * | 2021-12-21 | 2023-06-20 | 杭州麦乐克科技股份有限公司 | Method for detecting volatilization rate of harmful volatile gas in object at low temperature |
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