CN202133569U - Semi-passive mode air sampler - Google Patents
Semi-passive mode air sampler Download PDFInfo
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- CN202133569U CN202133569U CN 201120212736 CN201120212736U CN202133569U CN 202133569 U CN202133569 U CN 202133569U CN 201120212736 CN201120212736 CN 201120212736 CN 201120212736 U CN201120212736 U CN 201120212736U CN 202133569 U CN202133569 U CN 202133569U
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Abstract
A semi-passive mode air sampler belongs to the technical field of building ambient air monitoring. The air sampler comprises adsorbents in particles, an agent cage and a base and is characterized by comprising an air pulling cylinder fixed on the base and a heater arranged above the agent cage. The heater is electrically connected with a power supply plug copper piece which is fixed on the base. The air pulling cylinder covers the heater and the agent cage and is connected with the base in detachable mode. The semi-passive mode air sampler is simple in structure, low in volume and cost and long in service life, no mechanical abrasion occurs in sampling, and no pollution gas escapes. The air sampler is simple to operate, so that household users can conduct sampling by themselves, and detection efficiency is high. The air sampler is low in operation cost, if heating power is 5w and sampling time is 2 hours, each sampling consumes 0.01-degree kilowatt-hour.
Description
Technical field:
The utility model relates to a kind of semi-passive air sampler, and it belongs to architectural environment air monitering technical field.
Background technology:
Name is explained:
VOC: be meant that under normal pressure boiling point 50-260 ℃ various organic compounds mainly comprise: benzene,toluene,xylene, ethylbenzene, styrene etc.
Air sampler: one type of supplementary instrument, can gather or extract the tested VOC (VOC) in the surrounding air to be detected, just can detect the VOC concentration in the surrounding air to be detected with instrument logotypes such as gas chromatographs.Do not comprise sampler bag, air vessels such as sampling air bag.
Because building materials, ornament materials, furniture, household electrical appliances have used the material that contains VOC and formaldehyde in a large number when producing, in use subsequently, can progressively discharge the pollution indoor air environment.In the environment that VOC or formaldehyde exceed standard, live, symptoms such as ocular pain, sore-throat, headache, tired out sense, dysphoria appear in the man-hour regular meeting of work, study, are referred to as " sick building syndrome ", can cause the dirty impaired or leukaemia of a plurality of devices when serious.In order to guarantee the health of human living environment, will not check and accept for the newly-built, renovating and enlarging building that exceeds standard at pollutants such as VOC or formaldehyde.But,, be difficult to large tracts of land in the practice and promote because testing cost is higher for house decoration.Main cause under testing cost is in not is: the detection method that the acceptance of work is at present adopted is the active air sampler method of sampling, needs the testing staff to carry instrument and equipment and samples to the scene, needs to consume a large amount of manpowers and time.
Usually adopt several types of following air sampling rigs that building and home environment are carried out air sampling in the prior art:
Active air sampler: a kind of supplementary instrument; Through asepwirator pump and air-flow measurement device; Air sample with certain volume in the regular hour passes through the absorbing medium in the gatherer, and gas pollutant is concentrated in the absorbing medium, and reaches the purpose that concentrates sampling.Just can detect the VOC concentration in the surrounding air to be detected with instrument logotypes such as gas chromatographs.
Passive type air sampler: a kind of supplementary instrument; Be based on gas molecule diffusion or penetration theory and gather a kind of method of sampling of gaseous state in the air or steam-like pollutant; It does not have asepwirator pump and air mass flow metering device; Lean on its adsorbent is exposed to certain hour in the air (sampling time), make that a part of VOC is adsorbed in the adsorbent in the air.In sampling time fixedly the time, VOC concentration is directly proportional in the adsorbance of adsorbent and the air; VOC concentration one timing in air, adsorbance was directly proportional with the sampling time.Note the sampling time during use, can measure adsorbance with instrument logotype such as gas chromatograph, again through with various normal concentration down-samplings, detect the mass data that obtains and compare, just can detect the VOC concentration in the surrounding air to be detected.
The ultimate principle of passive adsorbing and sampling device is passive type absorption, and its main points are: must seal adsorbent before and after the sampling, only sampling period the chien shih adsorbent be exposed in the air.
There is following shortcoming in the passive type sampling apparatus: 1) sampling time long, generally to sample at least 8 hours; 2) when containing the lower environment of VOC and sample, the VOC adsorbance is on the low side, influences accuracy of detection; 3) rubber seal itself tends to discharge VOC, influences measuring accuracy.The passive type method of sampling can reduce the detection cost significantly, but because the sampling time is long, accuracy of detection is low, thereby not widespread use as yet.
Active sampling thief costs an arm and a leg, must be by professional testing staff operation, so labour cost, depreciation of equipment and transportation expenses just make and detect cost and be difficult to significantly reduce, make many families hope Indoor Environment Detection and draw back.
Semi-passive air sampler: a kind of supplementary instrument; On the basis of passive type air sampler; Increase the device that makes air flow; Adsorbable more VOC in the identical time, or make the abundant VOC of adsorbents adsorb in the short period of time, can effectively improve accuracy of detection or improve sampling efficiency.But also there is not ripe semi-passive air sampler technology to utilize in the prior art.
Summary of the invention:
It is short that the purpose of the utility model provides a kind of adsorption time, the semi-passive air sampler that sampling efficiency is high.
The purpose of the utility model is achieved in that
A kind of semi-passive air sampler, it comprises granular pattern adsorbent, medicament cage, base, it is characterized in that it comprises that is fixed on pulling out air duct, place the well heater of medicament cage top on the base, well heater and attaching plug copper sheet are electrically connected; Described copper sheet is fixed on the base; The described air duct that pulls out covers well heater and medicament cage and removably connects with base.
Described medicament cage is cylindrical or elliptical cylinder-shape or prismatic structures, and described material is perforated metal or wire netting.
Described medicament cage is provided with stopper.
Described susceptor surface is provided with and is used for medicament cage small boss of installing and the big boss that is used to pull out the air duct installation, is equipped with on the described large and small boss to be used to pull out air duct connecting thread or bayonet socket.
The described air duct profile of pulling out is a chimney that has tapering, and its underpart is provided with several equally distributed fresh air inlets; The described following bead that pulls out air duct is provided with and is used for the screw thread or the bayonet socket that are connected with base.
Described well heater is the electric heater of 3～8W power.
Described electric heater is the electric heater that is made up of a plurality of metalfilmresistors.
Described plug copper sheet is symmetrical set on the base by two, and the size of described copper sheet exposed parts in the base bottom is identical with two flat plugs of normal domestic use electrical equipment.
Also can the wind hole be arranged on and pull out on the air duct, but equally distributed depression is set at the big boss place of base.When pulling out air duct and be connected with base, the wall and the depression on the base of pulling out air duct have just constituted air inlet, and its effect is identical with above-mentioned fresh air inlet.
Described granular pattern adsorbent is activated charcoal or molecular sieve; Described base is teflon or food-grade polyethylene material; Pulling out air duct is teflon or food-grade polyethylene material.
The utility model is simple in structure, and volume is less, and is cheap, do not have machinery wearing and tearing, the effusion of pollution-free gas during sampling, long service life; Simple to operate, the domestic consumer can sample voluntarily, and detection efficiency is high; Operating cost is low, presses 5 watts of heating powers, 2 hours sampling times meter, power consumption 0.01 degree of at every turn sampling.
Description of drawings:
Fig. 1 is the structural representation of the utility model embodiment 1
Fig. 2 is the A-A cut-open view of Fig. 1
Fig. 3 is the local amplification view in the bottom of the utility model embodiment 2
Embodiment:
Below in conjunction with accompanying drawing 1, Fig. 2 and Fig. 3, the utility model is further explained:
Embodiment 1:
In the present embodiment, the utility model it comprise granular pattern adsorbent 1, medicament cage 2, base 3.Adsorbent 1 can be selected materials such as activated charcoal, molecular sieve for use.Select for use materials such as activated charcoal, molecular sieve to belong to the content of prior art.In order to realize the purpose of the utility model, the utility model comprises that also is fixed on pulling out air duct 4, place the well heater 5 of medicament cage top on the base 3, and well heater and attaching plug copper sheet 6 are electrically connected; Described copper sheet 6 is fixed on the base 3; The described air duct 4 that pulls out covers well heater and is connected with the medicament cage and with base.Described in the present embodiment medicament cage 2 is cylindrical or elliptical cylinder-shape or prismatic structures, and described material is perforated metal or wire netting.Described medicament cage 2 is provided with stopper 21, so that the installation that the filling of adsorbent and taking-up and medicament cage are fixed in base 3.Described base 3 surfaces are provided with and are used for medicament cage small boss of installing 31 and the big boss 32 that is used to pull out the air duct installation, and described big boss 32 is provided with and is used to pull out air duct connecting thread or bayonet socket; Rigid plastic such as making such as teflon, food-grade polyethylene that base 3 should adopt non-volatility gas to overflow.Described air duct 4 profiles of pulling out are a chimney that has tapering, and its underpart is provided with several fresh air inlets 41.
The described following bead that pulls out air duct 4 is provided with and is used for the screw thread or the bayonet socket that are connected with base.Rigid plastic such as the making such as teflon, food-grade polyethylene that should adopt non-volatility gas to overflow.Described well heater 5 is the electric heater of 3～8W power.Described in the present embodiment electric heater is the electric heater that is made up of a plurality of metalfilmresistors, can adopt a plurality of metalfilmresistors to substitute, and adopts 8 100 kilohms/1 watt resistance parallel connection to use in the present embodiment, and its general power is about 3 watts.Described plug copper sheet 6 is symmetrical set in the base by two, and the distance of copper sheet and center is 12.7mm, and each copper sheet exposes 16.5mm as plug portion.Specifically in the present embodiment: the sectional dimension of plug copper sheet 6 is 6.2mm * 1.4mm, and length is about 50mm.When injection mo(u)lding base 3, copper sheet is fixed in the base, two copper sheet symmetric arrangement, centre distance are 12.7mm, and each copper sheet exposes 16.5mm as plug portion.Copper sheet can be considered the support of well heater at the upper surface exposed parts of base, and the support protruded length is about 20mm.
The medicament cage that the utility model needs adsorbent will be housed before use installs, and the utility model is encapsulated in " closely knit bag ".As long as open closely knit bag during use, take out the utility model and also be inserted in immediately in the supply socket, can pick up counting the sampling beginning.After reaching the stipulated time, pull up sampling thief and rapid the threading in the closely knit bag from supply socket, sampling finishes.The record sampling time.
Principle of work: when switching on to well heater, the air that pulls out in the air duct is heated, and lighter hot-air will rise, and cold air can be got in the tube by the aperture that pulls out the air duct bottom, and the hot-air of air duct is pulled out in additional outflow.The cold air porous shell of flowing through rises to the well heater place and is heated, and forms the new power that rises, thereby makes cold air constantly brush the surface of porous shell in a steady stream.
Big boss place at base 3 is provided with equally distributed depression 33.And do not establish any fresh air inlet in the bottom of pulling out air duct 4.In the present embodiment, when pulling out air duct 4 with base 3 fastenings, 33 places of caving in have just formed air inlet.
Described in the present embodiment electric heater adopts 10 60 kilohms/1 watt resistance parallel connection to use, and its general power is about 8 watts.
Other part and the embodiment 1 of present embodiment are identical.
Claims (10)
1. semi-passive air sampler; It comprises granular pattern adsorbent (1), medicament cage (2), base (3); It is characterized in that it comprises that is fixed on pulling out air duct (4), place the well heater (5) of medicament cage top on the base (3), well heater and attaching plug copper sheet (6) are electrically connected; Described copper sheet (6) is fixed on the base (3); The described air duct (4) that pulls out covers well heater and medicament cage and removably connects with base.
2. the semi-passive air sampler described in claim 1 is characterized in that described medicament cage (2) is cylindrical or elliptical cylinder-shape or prismatic structures, and described material is perforated metal or wire netting.
3. the semi-passive air sampler described in claim 2 is characterized in that described medicament cage (2) is provided with stopper (21).
4. the semi-passive air sampler described in claim 1; It is characterized in that described base (3) surface is provided with the small boss (31) that is used for the installation of medicament cage and is used to pull out the big boss (32) of air duct installation, be equipped with on the described large and small boss to be used to pull out air duct connecting thread or bayonet socket.
5. the semi-passive air sampler described in claim 1 is characterized in that described air duct (4) profile of pulling out is a chimney that has tapering, and its underpart is provided with several equally distributed fresh air inlets (41); The described following bead that pulls out air duct (4) is provided with and is used for the screw thread or the bayonet socket that are connected with base.
6. the semi-passive air sampler described in claim 1 is characterized in that described well heater (5) is the electric heater of 3～8W power.
7. the semi-passive air sampler described in claim 6 is characterized in that described electric heater is the electric heater that is made up of a plurality of metalfilmresistors.
8. the semi-passive air sampler described in claim 1 is characterized in that described plug copper sheet (6) is symmetrical set on the base by two.
9. the semi-passive air sampler described in claim 1 is characterized in that at the big boss place of base (3) equally distributed depression (33) being set, and described wall and the depression on the base (33) of pulling out air duct constitutes air inlet.
10. the semi-passive air sampler described in claim 1 is characterized in that described granular pattern adsorbent is activated charcoal or molecular sieve; Described base is teflon or food-grade polyethylene material; Pulling out air duct is teflon or food-grade polyethylene material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120212736 CN202133569U (en) | 2011-06-22 | 2011-06-22 | Semi-passive mode air sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120212736 CN202133569U (en) | 2011-06-22 | 2011-06-22 | Semi-passive mode air sampler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202133569U true CN202133569U (en) | 2012-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120212736 Expired - Lifetime CN202133569U (en) | 2011-06-22 | 2011-06-22 | Semi-passive mode air sampler |
Country Status (1)
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| CN (1) | CN202133569U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353561A (en) * | 2011-06-22 | 2012-02-15 | 深圳市建筑科学研究院有限公司 | Semi-passive air sampler |
| CN104697821A (en) * | 2013-12-09 | 2015-06-10 | 深圳市鑫汇科股份有限公司 | Air detection device, air sampling device and air sampling method |
-
2011
- 2011-06-22 CN CN 201120212736 patent/CN202133569U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353561A (en) * | 2011-06-22 | 2012-02-15 | 深圳市建筑科学研究院有限公司 | Semi-passive air sampler |
| CN102353561B (en) * | 2011-06-22 | 2014-08-13 | 深圳市建筑科学研究院有限公司 | Semi-passive air sampler |
| CN104697821A (en) * | 2013-12-09 | 2015-06-10 | 深圳市鑫汇科股份有限公司 | Air detection device, air sampling device and air sampling method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120201 Effective date of abandoning: 20140813 |
|
| RGAV | Abandon patent right to avoid regrant |