KR100764519B1 - A Large chamber type pollution and air quality tester - Google Patents

Abstract

The present invention includes an air introduction filter unit 100, a thermo-hygrostat 200, a chamber 300, an exhaust unit 40 and a plurality of sampling ports (P1 ~ P13) for detecting the concentration of harmful gases In release testing equipment; The chamber 300 has a large internal volume for accommodating furniture, windows and large building materials or home appliances, airtightness is maintained, the inner wall is made of a metal (stainless steel) that is not adsorbed harmful substances ; A high temperature heating part 500 for heating the inside of the chamber 300 to a high temperature to remove contaminants stuck to the inner wall of the chamber; And a recirculation line 600 for bypassing the air in the chamber having the temperature lowered to 30 ° C. or lower to the air introduction filter unit 100 so that the air in the chamber 300 achieves an initial test condition. In such a case, large building materials such as windows and doors, furniture, and various home appliances are put into a large chamber 300 having almost the same conditions as the indoor environment, and thereafter, they are harmful substances such as volatile organic compounds and formaldehyde. The amount of release can be measured.

Pollutants, Large Chambers, Materials, Testing, Volatile Organic Compounds, Formaldehyde

Description

Large chamber type pollution and air quality tester

1 is a block diagram of a tester for measuring the hazardous materials of building materials according to the prior art,

2 is a block diagram of a large chamber pollutant discharge material test apparatus according to the present invention,

3 is a schematic configuration diagram of a thermo-hygrostat applied to the present invention,

4 is a flowchart showing the test procedure in the test apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

100: air introduction filter unit 110: pre-filter

120: dehumidifier 130: damper

140: blower 150: main filter

152: primary filter 154: secondary filter

156: 3rd order filter 158: 4th order filter

200: thermo-hygrostat 210: water tank

220: dehumidification coil 230: humidification heater

240: dry heater 250: damper

300: chamber 301: inner wall

302: outer wall 303: insulation

304: pressure gauge 305: temperature sensor

306: relative humidity sensor 307: pressure gauge

308: flow meter 309: flow meter

400: exhaust unit 410: blower

420: damper 500: high temperature heating unit

510: heater 520: blower

530: inlet damper 540: outlet damper

600: recirculation line 610: check valve

620: damper 700: PLC circuit

710 touch screen 800 control computer

P1 ~ P13: Sampling port

The present invention relates to a large chamber type pollutant emission material testing apparatus, and in detail, large building materials such as windows and doors, furniture and various home appliances, etc. In this state, the amount of harmful substances such as volatile organic compounds and formaldehyde can be measured.

In general, various building materials used in buildings such as apartments, especially building interior materials such as wallpaper and flooring, interior furniture such as cabinets, and various household products such as refrigerators, contain volatile organic compounds or harmful substances such as formaldehyde. It is reported that contaminating indoor air causes problems such as sick house syndrome (SHS) and multiple chemical sensitivity (MCS), causing damage to the human body.

The prior art related to the present invention discloses a tester for measuring the hazardous materials of building materials of Patent Publication No. 2005-0087561, which is included in the air by forcibly injecting external air from the air generator 11 as shown in FIG. Clean air supply unit 10 for supplying the clean dry air and wet air by removing the various foreign matters by step through the various filters; A temperature and humidity unit 20 which draws in dry and wet air generated by the clean air supply 10 and displays and controls the temperature and humidity in the controller 22 by the sensor 21; The dry and wet air that has passed through the temperature and humidity unit 20 flows through the pipe and is ventilated to the clean air supply 10 in a state where the building material specimen A is enclosed in a hollow interior and is similar to an indoor environment. A cell 30 to have; Adsorption tube which is piped in communication with the inside of the cell 30 to allow various harmful substances to be adsorbed to the adsorption material filled inside when the air in the cell 30 is forcibly discharged by the operation of the MFC pump 41 ( 40), the vortex mixing coil 50 is installed between the clean air supplier 10 and the temperature and humidity unit 20 so that the dry air and the wet air are completely mixed.

On the other hand, in the case of the conventional tester described above, the cell 30 is made of a small metal container of 20 liters in which a cover is detachable, so that the plate is different from the indoor environment of an actual building in which home appliances, various office equipment, building materials, etc. are installed. It is not just an experiment in a laboratory state, but the data measured in the experiment predicts the amount of pollutants emitted by various home appliances, office equipment, and building materials from the actual residential environment, and thus, accurate evaluation is not made. However, in the case of large samples, there was a disadvantage in that testing using such a tester itself is impossible.

The present invention has been made to solve the above-mentioned conventional problems, the object of the present invention is to determine the indoor air pollution state caused by harmful substances such as volatile organic compounds and formaldehyde generated from building materials, furniture and various home appliances In order to accurately evaluate and propose improvement methods, furniture such as kitchen furniture, desks, sofas, etc., which cannot be measured by existing small chamber test equipment, and various electronic products such as TVs, refrigerators, copiers, and microwave ovens, It is an object of the present invention to provide equipment for performing accurate tests on the amount of volatile organic compounds and formaldehyde emitted from large building materials such as living room windows and doors.

In order to achieve the above object, the present invention includes an air introduction filter unit for forcibly suctioning the outside air to remove various foreign substances contained in the air while passing through the various filters step by step to supply clean air; A thermo-hygrostat for appropriately controlling the temperature and humidity of the air filtered by the air introduction filter unit; A chamber into which air passing through the constant temperature and humidity chamber is introduced and which is built in a sealed state of building materials and furniture; An exhaust unit configured to be in communication with the inside of the chamber to forcibly discharge air in the chamber; A plurality of sampling ports installed in the chamber, at the front / rear end of the air introduction filter unit, and at the end of the exhaust unit to measure harmful gases contained in air;

The chamber has a large internal volume such as 5m 3, 12m 3, 24m 3, etc., which can accommodate furniture, windows and large building materials or home appliances. It is made of metal such as stainless steel that is not adsorbed;

The chamber is further provided with a high temperature heating unit for removing the contaminants stuck to the inner wall of the chamber by heating to a high temperature;

After removing the harmful gas on the inner wall of the chamber by high temperature heating and exhausting, the air in the chamber is recycled to the air inlet filter unit and the constant temperature and humidity chamber after the temperature inside the chamber is lowered to 30 ° C. or lower. It provides a large chamber type pollutant emission material testing device further comprising; a recycling line to allow a relative humidity of 50%.

Hereinafter, with reference to the accompanying drawings, preferred embodiments that do not limit the present invention will be described in detail.

Figure 2 shows the configuration of a large chamber contaminant emission material test apparatus according to the present invention, the present invention air introduction filter unit 100, thermo-hygrostat 200, chamber 300, exhaust unit 400 And a plurality of sampling ports (P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, P11, P12, P13), wherein the chamber 300 includes furniture, windows and large constructions. It has an internal volume (for example, 5 ㎥, 12 ㎥, 24 ㎥, etc.) that can accommodate materials or home appliances as a whole, and airtightness is maintained. )

In the present invention, the chamber 300 is further provided with a high temperature heating unit 500 for heating the air inside the chamber to a high temperature to eliminate contaminants stuck to the inner wall of the chamber 300, the high temperature heating Part 500 is to circulate the air in the chamber to a temperature of 120 ℃ in a state in which the dampers (250,420) closed for a certain time to increase the thermal efficiency and to save energy, and open and remove the dampers (130,250,420) after high temperature heating The gas can be discharged to the outside air.

In addition, in the present invention, after the internal air temperature of the chamber 300 is lowered to 30 ° C. or lower after high temperature heating and discharging, the damper 420 of the exhaust unit 400 and the damper 130 of the air introduction filter unit 100 are removed. It is further provided with a recirculation line 600 for closing and recirculating the air inside the chamber 300 toward the air introduction filter unit 100 so that the air inside the chamber 300 becomes an initial experimental condition.

In the figure, reference numeral 700 denotes a PLC circuit, and reference numeral 800 denotes a control computer.

The air introduction filter unit 100 is a pre-filter 110 for removing fine dust or other particulate matter in the air introduced from the outside, and using a molecular before the outside air flows into the main filter thereafter Dehumidifier 120 to remove the moisture contained in the outside air to maintain a long life and performance of the main filter, a damper 130 for blocking or opening the introduction of the outside air, suction side blower 140 for sucking the outside air ) And the main filter 150.

The suction side blower 140 is a device that transfers the outside air to the chamber 300 so that the amount of blown air can be precisely controlled by interlocking the flowmeter and the inverter.

In the present embodiment, the main filter 150 has a total of four stages. The primary filter 152 is a special activated carbon filter for removing aldehydes, and the secondary filter 154 removes volatile organic compounds (VOCs). Special activated carbon filter, the third filter 156 is an air-conditioning chemical filter by attaching a chemical material to the existing medium filter, the fourth filter 158 is a hepa filter, the main filter 150 is a chamber 300, it is possible to adjust the conditions of the outside air flowing into the interior below the reference value.

The thermo-hygrostat 200 uses a super heat control system method using ultrapure water, and temperature, humidification and dehumidification are controlled by the PLC 700. In the present invention, the thermo-hygrostat 200 is composed of a water tank 210, a dehumidifying coil 220 and heaters 230 and 240, as shown in Figure 3, the humidifier heater 230 is inserted into the water tank 210 by inlet air Control the saturation state, the dehumidification coil 220 of the method using the waste hot gas of the refrigerator is controlled by a humidification sensor not shown and functions to convert the saturated air to a set relative humidity, drying heater 240 Serves to convert the outside air introduced by the temperature sensor to the set temperature.

Reference numeral 250 in the figure is a pressure sensor for measuring the air pressure before being introduced into the chamber 300.

The chamber 300 has a dual structure, and a heat insulating material 303 is interposed between the chamber inner wall 301 and the outer wall 302 to minimize heat loss inside the chamber 300. In addition, the inner wall 301 of the chamber 300 always uses a clean stainless steel plate, and the joint is welded to prevent contamination of volatile organic compounds and formaldehyde.

The internal pressure of the chamber 300 must be maintained between 5 and 10 Pa to prevent contamination from the outside of the chamber 300, and a pressure of 1000 Pa is applied to the inner chamber to prevent outside air from being mixed. The allowable amount of leakage is made to be less than 0.1% of the chamber volume per minute or less than 1% of the air supply.

The chamber 300 is provided with a pressure gauge 304 for detecting the pressure inside the chamber, a temperature sensor 305 for detecting the temperature and a humidity sensor 306 for detecting the relative humidity, these pressure gauge 250 And 304 and the sensors 305 and 306 transmit the detected signal value to the PLC circuit 700.

The exhaust unit 400 is configured to precisely control the blowing amount of the exhaust side blower 410 by interlocking the flow meter and the inverter.

Hereinafter, the installation positions of the sampling ports P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, P11, P12, and P13 for measuring the concentration of VOCs and formaldehyde will be described.

First, the first sampling port P1 measures the concentration of VOCs and formaldehyde in the outside air, which is installed at the tip of the prefilter 110 of the air introduction filter unit 100, and the second sampling port P2 is air. It is provided at the rear end of the main filter 150 of the introduction filter unit 100 to measure the concentration of VOCs and formaldehyde in the air filtered through the air introduction filter unit 150.

In addition, the third sampling port (P3) is installed in front of the damper 420 of the discharge unit 400 to measure the concentration of VOCs and formaldehyde in the air discharged to the outside after passing through the chamber 300 have.

On the other hand, the remaining sampling ports (S4 ~ S13) are all distributed in the proper position inside the chamber 300 to measure the concentration of VOCs and formaldehyde contained in the air in the chamber 300, all these Sampling lines (not shown) are connected to the front of the control panel, not shown, to the sampling ports P1 to P13 to facilitate sampling operations from the front of the control panel.

The high temperature heating unit 500 is a facility for thermal desorption of VOCs and formaldehyde components attached to the surface of the inner wall 301 of the chamber 300 after a sample test. When the high temperature is heated by the circulation blower 520 and the inlet and outlet dampers 530 and 540 installed inside the high temperature heating system, the air inside the chamber 300 is closed for a predetermined time to the high temperature heating unit 500. It is designed to increase thermal efficiency and reduce energy by self-circulating.

The recirculation line 600 heats the air in the chamber to a high temperature and then opens the dampers 130, 250 and 420 to discharge the desorbed VOCs gas to the outside, and opens the chamber 300 after the temperature is lowered to 30 ° C. or lower. When the dampers 130 and 420 are closed, the air inside the chamber 300 may satisfy the initial test conditions (25 ° C., 50% Rh) through the recirculation line 600 without exhausting the air inside the chamber 300 to the outside. Until cycled.

One end of the recirculation line 600 branches from the tip of the damper 420 of the exhaust unit 400, and the other end of the recirculation line 600 is on the intake pipe between the damper 130 and the blower 140 of the air introduction filter unit 100. To join.

The PLC circuit 700 is a system capable of automatically operating a damper, a flow control, a temperature / humidity control, and a high-temperature bake-out required for a test, and operates a device through a touch screen 710. Observation is possible.

The control computer 800 is a system capable of automatically performing damper operation, flow rate control, temperature / humidity control, and high temperature heating operation required for the test, using a program to remotely control the device and collect, store, and output test data. This becomes possible.

Using the test apparatus of the present invention configured as described above is shown in Figure 4 the process of measuring the emission amount of various pollutant emission materials, a method for testing based on this will be described.

Step S1; After first washing the inside of the chamber 300 by using ethanol for disinfection, it is washed again using ultrapure distilled water.

Step S2: By operating the high temperature heating unit 500 in a state in which the dampers 250 and 420 of the inlet / outlet side of the chamber 300 are closed, the inside of the chamber 300 is heated to a high temperature to remove contaminants. The heating temperature depends on the size and material of the chamber and the thermal desorption time is adjusted according to the heating temperature.

At this time, the circulation of the air inside the chamber 300 is a recirculation method of the air inside the chamber 300, by opening the inlet and outlet dampers 530 and 540 and operating the circulating blower 520 to generate heat from the heater 510. Operation is stopped after raising the internal temperature to the target temperature (maximum 120 ℃).

Next, the dampers 250 and 420 are opened, and the inside of the chamber 300 is maintained at a positive pressure to discharge the heat-dropped contaminants therein.

Step S3: Sampling for evaluating the background concentration and the recovery rate of the chamber 300 is performed using the detection sensors S4 to S13.

Step S4: The collected air is analyzed using GC / MS (Gas Chromatograph / Mass Spectrometer) and HPLC (High-Performance Liqid Chromatograph). At this time, the TVOCs concentration is 10 μg / ㎥, for example, formaldehyde concentration is 5 ㎍ / ㎥ confirms whether the condition (may be changed by the law later).

Step S5: If the background concentration exceeds the above target value, the air introduction filter unit 100 checks for each element and returns to step S1 again, and repeats the following steps.

Step S6: When the background concentration is analyzed to be below the reference value (e.g., 10 µg / m 3, formaldehyde concentration is 5 µg / m 3), the measurement product is introduced into the chamber 300 for product measurement.

Step S7: TVOC concentration and formaldehyde concentration detected from the detection sensors (S4 ~ S13) in the state in which the measurement product is put into the chamber 300 is measured.

Step S7: Analyze and evaluate the concentration of the noxious gas measured above.

As described above, the present invention can be applied to furniture such as kitchen furniture, desks and sofas, electronic products such as televisions, refrigerators, copiers and microwave ovens, and large building materials such as living room windows and entrance doors, which were impossible to measure using the conventional small chamber method. Since research and testing on the amount of hazardous chemicals emitted can be conducted in a similar state to the actual living environment, it is possible to provide a technology base that can provide fundamental solutions to the problems of sick house syndrome and chemical hypersensitivity. Has

Claims (5)

The air inlet filter unit 100 for supplying clean air by eliminating various foreign substances contained in the air by stepping through various filters by forced suction of external air, and the air filtered by the air inlet filter unit 100. Thermo-hygrostat 200 for controlling the temperature and humidity, the air passing through the thermo-hygrostat 200 is introduced into the chamber 300 is built in a building material or furniture sealed state, and the chamber 300 of It is installed in communication with the inside of the exhaust unit 400 forcibly discharging the air in the chamber, the interior of the chamber 400 and the front and rear ends of the air introduction filter unit 100 and the exhaust unit 400 is provided It comprises a plurality of sampling ports (P1 ~ P13) for measuring the concentration of harmful gases contained in the air; The chamber 300 has an internal volume of a size that can accommodate a large contaminant releasing material, including furniture or large building materials or home appliances or office equipment, and airtightness and insulation is maintained, the inner wall 301 is harmful The material consists of a metal which is not adsorbed; The chamber 300 is further provided with a high temperature heating unit 500 for heating off the contaminants stuck to the chamber inner wall (301) to drop off; A recirculation line 600 which bypasses the air inside the chamber 300 to the air introduction filter unit 100 after the harmful gas is removed and exhausted by the high temperature heating so that the air inside the chamber 300 becomes the initial test condition; Large chamber type pollutant emission material testing device further comprising. The method according to claim 1, The air introduction filter unit 100 includes a prefilter 110, a dehumidifier 120, a damper 130 for blocking or opening the introduction of outside air, a suction side blower 140 for inhaling the outside air, and a main filter. Including 150; The main filter 150 is a primary filter 152 for removing aldehydes made of activated carbon filter, a secondary filter 154 for removing VOCs made of activated carbon filter, a tertiary filter 156 made of chemical filter, and hepa Large chamber type pollutant emission material testing device comprising a filter 158 made of a filter. The method according to claim 1, The high temperature heating unit 500 is a heater 510 that can increase the temperature inside the chamber to a maximum of 120 ℃ to thermally desorb the VOCs and formaldehyde components attached to the surface of the inner wall 301 of the chamber 300 after the sample test And a circulation blower 520 for circulating the air in the chamber 300 and the inlet and outlet dampers 530 and 540. The high temperature heating is performed while the air inside the chamber 300 is closed for a predetermined time. Large chamber type pollutant discharge material test apparatus, characterized in that the circulating to the side 500. The method according to claim 1, The recirculation line 600 does not exhaust the air in the chamber to the outside through the recirculation line 600 in a state in which the dampers 130 and 420 that are open after the temperature inside the chamber 300 has dropped below 30 ° C. or less are closed. A large chamber type pollutant releasing material test apparatus, characterized in that the circulation is operated again by recirculating until the air inside the chamber 300 satisfies the relative humidity of 25 ℃, 50% of the initial experimental conditions. The method according to claim 1, The thermo-hygrostat 200 is composed of a water tank 210, a dehumidifying coil 220, a humidifying heater 230 and a drying heater 240, the humidifying heater 230 is inserted into the water tank 210 to receive the inlet air Adjusted to a saturation state, the dehumidification coil 220 converts saturated air to a set relative humidity, the drying heater 240 is a large chamber type pollutant discharge material, characterized in that to convert the outside air to a set temperature Test equipment.

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