CN203899617U - VOC and formaldehyde release amount environment simulation test box - Google Patents
VOC and formaldehyde release amount environment simulation test box Download PDFInfo
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- CN203899617U CN203899617U CN201420280028.0U CN201420280028U CN203899617U CN 203899617 U CN203899617 U CN 203899617U CN 201420280028 U CN201420280028 U CN 201420280028U CN 203899617 U CN203899617 U CN 203899617U
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Abstract
The utility model discloses a VOC and formaldehyde release amount environment simulation test box, and belongs to the technical field of environment detection. The VOC and formaldehyde release amount environment simulation test box comprises a main box and an equipment bin, wherein the main box comprises a heat-insulating housing, a heat-insulating inner container, an air sleeve and a working bin, wherein the heat-insulating inner container is arranged in the heat-insulating housing, the air sleeve is arranged in the heat-insulating inner container, the working bin is arranged in the air sleeve, and a dry-wet air ratio control system is arranged in the equipment bin; the dry-wet air ratio control system comprises a primary filtering purifier, a middle-high-class filtering purifier, a dehumidifier, an air pump, a humidifier, a flowmeter and a ratio control regulating valve. The VOC and formaldehyde release amount environment simulation test box has the benefits that the heat exchange area of the air sleeve is large, the temperature regulation is more smooth, the response speed is high, the thermal lag is small, and the temperature uniformity is good; compared with the humidity control mode of a dew point water tower, the dry-wet air ratio control system has the advantages as follows: the original simple replacement is changed into bidirectional regulation and replacement, so that the control accuracy is improved, the balance time is shortened, the structure is simplified, and the energy consumption is lowered.
Description
Technical field
The utility model relates to environment measuring technical field, is specifically related to a kind of VOC and burst size of methanal environmental simulation test case.
Background technology
Furniture, sheet material and the other products with human body contact can volatilize the harmful materials such as VOC (volatile organic matter), formaldehyde, particularly place in indoor, the car of intensive, space-closed for product, concentration after accumulation is higher, larger to human health damage.
VOC and burst size of methanal environmental simulation test case are that a kind of analog equipment that is used for discharges the chamber of VOC (formaldehyde) approaching under the environment that people live, a clean enclosure space is provided, control temperature, humidity, wind speed, ventilation rate in storehouse simultaneously, be used for the pollutant dispose procedure of analog equipment in human settlement, by the monitoring of pollutants in air concentration in storehouse being determined to the burst size of pollutant, be used for evaluating the Environmental Protection Level of product, test, assessment furniture the size of harmful substance burst size in the product such as building materials.
VOC and burst size of methanal environmental simulation test case, generally have following technical requirement:
The background concn value of case internal contamination thing must be very low, to guarantee can not interfere with sample (or little of negligible to the interference of sample) in test process, ensures test result accurately and reliably.
In control of temperature and humidity process, in storehouse, can not there is liquid state (or solid-state) water, some pollutants (such as formaldehyde) soluble in water, the appearance of aqueous water can make in storehouse material concentration soluble in water in air on the low side, thereby causes test failure.The methods such as general conventional frozen cooling, dehumidifying, steam humidification all can not be used.
Control and require: 23 ± 0.5 DEG C of temperature (or 25 DEG C), humidity 45 ± 3%RH (or 50%RH), ventilation rate 0.2～2.0 time/hour, center wind speed 0.1～0.3 meter per second, air-tightness requires to depress in the mistake of 1kPa the one thousandth that leakage rate is less than volume.
Material requires: working bin material must be the clean materials such as the stainless steel that can not discharge pollutant, glass, copper, and encapsulant must be clean flexibility (elasticity) materials such as polytetrafluoroethylene (PTFE).
Adiabatic requirement: working bin should be overall adiabatic good, and the variation of environment can not cause the larger fluctuation of humiture in case.When environment temperature is too low, can not produce cold bridge phenomenon makes working bin produce condensed water.
Clean air source: must be very clean for the air that equipment provides, filter plant should have good purification function, makes to send into very clean (TVOC≤20ug/m3) of working bin air.
Can not there is condensed water in temperature controlled processes, thereby aqueous water can cause test failure by absorption portion pollutant.The control method of existing temperature is that water circulation is controlled method indirectly, and by strengthening heat exchange area, the mode that reduces heat transfer temperature difference is carried out temperature control.For fear of the appearance except condensed water, common way is that the circulatory mediator water in heat exchanger replaces cold-producing medium, and refrigeration compressor is controlled temperature in storehouse indirectly by controlling water temperature.Because heat transfer temperature difference is little, in heat exchange temperature and cabin, the difference of temperature is less, is greater than dew point value, there will not be condensation, can avoid occurring condensed water.The shortcoming of this method is that equipment need to configure a water tank, and specific heat of water is large, and the energy that drives water tank to consume is many, and response speed is slow simultaneously, and temperature equilibrium time is long.
Can not there is condensed water in humidity control procedure, therefore humidification, dehumidifying part must be placed in outside working bin.Traditional way is to carry out controlled humidity by ventilation, in case, imports the air that humidity is qualified, replaces underproof air.The way of the qualified humidity air of existing preparation is to allow air flow through a water tower, water temperature in water tower is constant in some values, and water is always at circulated sprinkling, fully contact exchange with the air flowing through, the different water vapor pressure of the corresponding generation of different water temperatures, after target humidity is definite, water temperature is also determined, the air that output humidity is qualified.The shortcoming of this method is that equipment need to configure a water tower, water tower structure complexity, and specific heat of water is large, and the energy that drives water tower to consume is many, and response speed is slow simultaneously, and the wetting balance time is long.
The facility structure such as heat exchanger, the water tower more complicated of using in control of temperature and humidity process, clean more difficult, this is very unfavorable to the high chamber of background contaminants concentration requirement, background concentration is wayward, particularly clean also more difficult after product test, extend the time of test next time, inefficiency.The method of water tower controlled humidity is also very unfavorable to the purification of air feed, and the air of high humility can reduce the removal efficiency of sorbing material to pollutant, and the labyrinth of water tower is easy entrapment of contaminants also, once pollutant enters, reset procedure is more complicated and very long also.
In sum, the problem that existing product exists is: 1, temperature-responsive speed is slow, the time is long, and efficiency is low; 2, humidity response speed is slow, the time is long, and efficiency is low; 3, existing temperature control mode heat-exchange device is positioned at cabin, has taken space in part cabin, and utilization rate is low; 4, existing control of temperature and humidity mode is unfavorable for the purification of air feed; 5, the background concn value of working bin internal contamination thing is higher, the accuracy of impact experiment; 6, existing control mode energy consumption is high, occupation of land is large.
Utility model content
The purpose of this utility model is for a kind of VOC and burst size of methanal environmental simulation test case are provided, to improve control of temperature and humidity precision, shorten temperature, wetting balance time, reduce the concentration of background pollution thing, increase operation rate and practicality, reduce energy consumption and occupation of land.
In order to reach the purpose of this utility model, technical scheme is as follows:
A kind of VOC and burst size of methanal environmental simulation test case, have main tank and equipment compartment, described main tank comprises lagging casing, be arranged on heat-preservation liner in described lagging casing, be arranged on the air cover in described heat-preservation liner and be arranged on the working bin in described air cover; In described equipment compartment, be provided with dry moisture ratio control system.
As preferred technical scheme: described dry moisture ratio control system comprises primary filter clarifier, middle-and-high-ranking filtration purifier, dehumidifier, air pump, humidifier, flowmeter and proportion control control valve, described primary filter clarifier is communicated with described air pump, described air pump is communicated with described flowmeter, described flowmeter is communicated with described middle-and-high-ranking filtration purifier, described middle-and-high-ranking filtration purifier is communicated with described proportion control control valve, described proportion control control valve is communicated with dehumidifier and humidifier simultaneously, described dehumidifier and humidifier are communicated with described working bin simultaneously.
As preferred technical scheme: be provided with circulation air path in described equipment compartment, have circulating fan, heater, refrigerating plant in circulation air path, described circulation air path is communicated with described air cover.
As preferred technical scheme: be also provided with compressor, water temperature controller and condenser in described equipment compartment.
As preferred technical scheme: be provided with water tank, water replanishing device, liquid level protection device and heater in described humidifier.
As preferred technical scheme: described dehumidifier has dehydrating unit, refrigeration compressor set and self-draining arrangement.
As preferred technical scheme: be provided with pressure-regulating device in described air pump.
The beneficial effect the utlity model has:
Temperature control adopts the mode of air cover temperature control, has cancelled the heat exchanger in working bin.Working bin is made an interlayer around, in interlayer, there is air circulation, be provided with circulating fan and refrigeration, heater, carry out temperature in control cabinet by the temperature of controlling air in interlayer, the control mode heat exchange area of this air cover is very large, and the temperature homogeneity in working bin is fine, the specific heat of air is little simultaneously, quality is little, temperature-responsive speed is very fast, controls sensitively, has greatly shortened stabilization time.
Humidity control adopts dry gas, moisture proportional controlling means, has cancelled dew point bucket.Working bin is outside equipped with dehumidifier and humidifier, and the air leading in storehouse is selected by dehumidifier and humidifier according to the needs of humidity in cabin ratio on demand.The benefit of this control is no matter humidity is higher than desired value or lower than desired value in storehouse, can pass into dry gas (or moisture) rapidly neutralization to target humidity, follow the air Shift Method of dew point water tower to compare, equilibration time only has original 1/5th.
Temperature control is taked, after the control mode of air cover, to have cancelled heat exchanger in working bin, and available volume has increased approximately 10%, is more conducive to sample and places and test.
Realize humidification object by the volatilization of water in water tank, by water temperature controller by constant water temperature an appropriate temperature, can meet humidification amount, can in working bin, there is not again condensation, this humidification is different from the conventional method such as steam humidification, ultrasonic humidifying, steam, ultrasonic humidifying can form aqueous water in storehouse, can not be used for this chamber.
The concentration of new control mode background pollution thing is lower.Cancelled heat exchanger and baroque dew point water tower, made device structure more succinct, more easy cleaning, more easily returns to next test mode after experiment finishes.Installed capacity is little, and energy consumption is little, has reduced occupation of land, more environmental protection simultaneously.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model VOC and burst size of methanal environmental simulation test case;
Fig. 2 is the right TV structure schematic diagram of Fig. 1;
Fig. 3 is the left TV structure schematic diagram of Fig. 1;
Schematic flow sheet when Fig. 4 is the utility model VOC and the work of burst size of methanal environmental simulation test case.
Detailed description of the invention
Below in conjunction with embodiment, the utility model is further described, but protection domain of the present utility model is not only confined to embodiment.
Shown in Fig. 1, a kind of VOC and burst size of methanal environmental simulation test case, have main tank and equipment compartment 6, main tank comprises lagging casing 2, be arranged on heat-preservation liner 3 in lagging casing 2, be arranged on the air cover 4 in heat-preservation liner 3 and be arranged on the working bin 19 in air cover 4.In equipment compartment 6, be provided with dry moisture ratio control system.
Lagging casing 2 is metal shell, and the heat-barrier materials such as inner filled polyurethane prevent the become estranged impact of isolation environment of energy flow.Air cover 4 is the seal cavities that form between the inwall of heat-preservation liner 3 and working bin 19 bulkheads, air in air cover 4 communicates with the circulation air path that is arranged on equipment compartment 6, in circulation air path, there are circulating fan, heater, refrigerating plant, by the temperature in wind loop control working bin 19.
Working bin 19, makes (as mirror face stainless steel) by the material of inertia and inner wall smooth, and cabin body sealing is good, when working bin 19 is in running order, inside and outsidely can not produce air exchange.Air stirrer is equipped with in working bin 19 inside, and the drive part of agitating device is external.
Continue in conjunction with shown in Fig. 2, Fig. 3, the front side of main tank has Qianmen 13, is provided with transparent observation window 5, in order to observe inner case on Qianmen 13; The rear side of main tank is provided with the first motor mounting plate 15 and the second motor mounting plate 16, in order to mounted motor, is provided with several sample taps 14 on main tank sidewall, in order to sampling.On equipment compartment 6, be provided with touch-screen 7 and indicator lamp 9, in order to control machine and to regulate parameter etc.The side of equipment compartment 6 is provided with switch mounting groove 8 and flowmeter mounting groove 10, and in order to switch and flowmeter 28 to be installed, flowmeter mounting groove 10 is positioned at the below of switch mounting groove 8 respectively.Chamber bottom is provided with square tube base 11, and square tube base 11 supports whole chamber, and square tube base 11 belows are provided with castor 12, and castor is in order to facilitate nigration case.Between equipment compartment 6 and main tank, be provided with dividing plate 20.
Equipment compartment 6 comprises the first half and the latter half, outside correspondence be provided with door 17 and lower door 18, upper and lower half is provided with equipment compartment dividing plate 22 between dividing.Equipment compartment 6: be used for supervising device, attemperating unit, humidity conditioner, gas supply assembly, filtration, purification system, circuit devcie of place apparatus etc.In equipment compartment 6 the latter halfs, be provided with primary filter clarifier 26, middle-and-high-ranking filtration purifier 34, dehumidifier 30, air pump 33, compressor 31 and condenser 32, in equipment compartment 6 the first half, be provided with humidifier 35 and water temperature controller 23, on the sidewall of the first half, be provided with filler 24 and fan cover 25, in the latter half of equipment compartment 6, be also provided with platform 21.
Primary filter clarifier 26 is communicated with air pump 33, air pump 33 is communicated with flowmeter 28, flowmeter 28 is communicated with middle-and-high-ranking filtration purifier 34, middle-and-high-ranking filtration purifier 34 is communicated with proportion control control valve 27, proportion control control valve 27 is communicated with dehumidifier 30 and humidifier 35 simultaneously, and dehumidifier 30 and humidifier 35 are communicated with working bin 19 simultaneously.
Shown in Fig. 4, basic procedure is: air pump 33 driving gases are after the first filtration of primary filter 26, through flowmeter 28, enter again middle-and-high-ranking filtration purifier 34, air passing ratio control and regulation valve 27 after purification, pass through in proportion dehumidifier 30, humidifier 35 according to the requirement of working bin 19 interior humidity, finally pass into working bin 19, complete whole humidity control procedure.
Wherein in air pump 33, be provided with pressure-regulating device, can carry out pressure control, be used to provide the air that pressure is suitable; Flowmeter 28 can carry out flow-control, is used for being metered into the air capacity in working bin 19, ensures the numerical value of air displacement rate in regulation; Primary filter clarifier 26 and middle-and-high-ranking filtration purifier 34 are used for ensureing that the air that enters working bin 19 is clean, can meet the requirement of low background concn value; Humidifier 35 has the annexes such as water tank, water replanishing device, liquid level protection, heater, and water temperature controller 23 is controlled the temperature of water in water tank automatically, ensures that the evaporation capacity of steam can meet the humidification requirement of equipment; Dehumidifier 30 has refrigeration dehumidifying device, disposes mini-type refrigeration compressor group, and self-draining arrangement is arranged at bottom, is used for discharging the condensed water that dehumidifying produces.Realize humidification object by the volatilization of water in water tank, by water temperature controller 23 by constant water temperature an appropriate temperature, can meet humidification amount, can in working bin, there is not again condensation, this humidification is different from the conventional method such as steam humidification, ultrasonic humidifying, steam, ultrasonic humidifying can form aqueous water in storehouse, can not be used for this chamber.
Claims (7)
1. a VOC and burst size of methanal environmental simulation test case, there is main tank and equipment compartment (6), it is characterized in that: described main tank comprises lagging casing (2), is arranged on the interior heat-preservation liner (3) of described lagging casing (2), is arranged on the air cover (4) in described heat-preservation liner (3) and is arranged on the working bin (19) in described air cover (4); In described equipment compartment (6), be provided with dry moisture ratio control system.
2. VOC according to claim 1 and burst size of methanal environmental simulation test case, it is characterized in that: described dry moisture ratio control system comprises primary filter clarifier (26), middle-and-high-ranking filtration purifier (34), dehumidifier (30), air pump (33), humidifier (35), flowmeter (28) and proportion control control valve (27), described primary filter clarifier (26) is communicated with described air pump (33), described air pump (33) is communicated with described flowmeter (28), described flowmeter (28) is communicated with described middle-and-high-ranking filtration purifier (34), described middle-and-high-ranking filtration purifier (34) is communicated with described proportion control control valve (27), described proportion control control valve (27) is communicated with dehumidifier (30) and humidifier (35) simultaneously, described dehumidifier (30) and humidifier (35) are communicated with described working bin (19) simultaneously.
3. VOC according to claim 1 and burst size of methanal environmental simulation test case, it is characterized in that: described equipment compartment is provided with circulation air path in (6), in circulation air path, have circulating fan, heater, refrigerating plant, described circulation air path is communicated with described air cover (4).
4. VOC according to claim 1 and burst size of methanal environmental simulation test case, is characterized in that: in described equipment compartment (6), be also provided with compressor (31), water temperature controller (23) and condenser (32).
5. VOC according to claim 2 and burst size of methanal environmental simulation test case, is characterized in that: described humidifier is provided with water tank, water replanishing device, liquid level protection device and heater in (35).
6. VOC according to claim 2 and burst size of methanal environmental simulation test case, is characterized in that: described dehumidifier (30) has dehydrating unit, refrigeration compressor set and self-draining arrangement.
7. VOC according to claim 2 and burst size of methanal environmental simulation test case, is characterized in that: described air pump is provided with pressure-regulating device in (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420280028.0U CN203899617U (en) | 2014-05-29 | 2014-05-29 | VOC and formaldehyde release amount environment simulation test box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420280028.0U CN203899617U (en) | 2014-05-29 | 2014-05-29 | VOC and formaldehyde release amount environment simulation test box |
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| Publication Number | Publication Date |
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| CN203899617U true CN203899617U (en) | 2014-10-29 |
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| CN201420280028.0U Expired - Fee Related CN203899617U (en) | 2014-05-29 | 2014-05-29 | VOC and formaldehyde release amount environment simulation test box |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535424A (en) * | 2018-07-10 | 2018-09-14 | 重庆威尔震昌科技股份有限公司 | A kind of test specimen VOC discharges the removal system of amount detecting device and formaldehyde in air |
| CN109395481A (en) * | 2018-11-05 | 2019-03-01 | 苏州市东华试验仪器有限公司 | A kind of test built in air filter plant |
| CN109855898A (en) * | 2019-02-27 | 2019-06-07 | 中国石油大学(华东) | Single well site La Jing storage tank opens wide liquid level contaminated-oil basin VOCs emission transaction device |
| CN112444480A (en) * | 2020-10-15 | 2021-03-05 | 江苏金环试验设备有限公司 | Freezing-thawing and dry-wet alternation test device and use method thereof |
-
2014
- 2014-05-29 CN CN201420280028.0U patent/CN203899617U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535424A (en) * | 2018-07-10 | 2018-09-14 | 重庆威尔震昌科技股份有限公司 | A kind of test specimen VOC discharges the removal system of amount detecting device and formaldehyde in air |
| CN108535424B (en) * | 2018-07-10 | 2023-12-29 | 重庆威尔震昌科技股份有限公司 | Test piece VOC release detection device and system for removing formaldehyde in air |
| CN109395481A (en) * | 2018-11-05 | 2019-03-01 | 苏州市东华试验仪器有限公司 | A kind of test built in air filter plant |
| CN109855898A (en) * | 2019-02-27 | 2019-06-07 | 中国石油大学(华东) | Single well site La Jing storage tank opens wide liquid level contaminated-oil basin VOCs emission transaction device |
| CN112444480A (en) * | 2020-10-15 | 2021-03-05 | 江苏金环试验设备有限公司 | Freezing-thawing and dry-wet alternation test device and use method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20170529 |
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| CF01 | Termination of patent right due to non-payment of annual fee |