Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N1/00—Sampling; Preparing specimens for investigation
  • G01N1/02—Devices for withdrawing samples
  • G01N1/22—Devices for withdrawing samples in the gaseous state
  • G01N1/2226—Sampling from a closed space, e.g. food package, head space
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N1/00—Sampling; Preparing specimens for investigation
  • G01N1/02—Devices for withdrawing samples
  • G01N1/22—Devices for withdrawing samples in the gaseous state
  • G01N1/2226—Sampling from a closed space, e.g. food package, head space
  • G01N2001/2241—Sampling from a closed space, e.g. food package, head space purpose-built sampling enclosure for emissions

Definitions

• the present invention relates to a system for collecting chemical substances emitted from products such as building materials, furniture, household appliances, daily necessities, and daily necessities, particularly when those products are installed (installed) in actual building rooms. It relates to a system that reproduces environmental conditions close to that of the above and collects chemical substances emitted from products under the reproduced environmental conditions.
• the easiest way to measure the amount of emitted chemicals is to place the device that emits contaminated chemicals and a device that collects and analyzes contaminated chemicals in a single chamber, and then emit for a certain amount of time in that chamber.
• Devices that measure the amount of chemical substances collected and that install contaminated chemical substances are installed in the chamber, and the collected contaminated chemical substances are analyzed by an analyzer outside the chamber.
• the amount of emission measured in the simple environment in the chamber as described above is the actual building May be different from the emission measured in the room.
• the temperature and humidity conditions of the air in the chamber may affect the amount of polluting chemicals released.
• the measurement results may differ from the measurement results in an actual room in which adequate ventilation is provided by opening and closing doors and windows.
• an object of the present invention is to provide an environment in a chamber that is close to an environment where an object is actually constructed (installed) in a room of a building. It is an object of the present invention to provide a system for collecting pollutant chemicals emitted from an object under the environmental conditions that have been realized.
• the system of the present invention for collecting chemical substances emitted from an object under controlled and environmental conditions is:
• a double chamber consisting of an inner chamber in which an object and a chemical substance collecting device are housed, and an outer chamber in which the inner chamber is housed;
• Air supply means for supplying air into the double chamber
• Air-conditioning means for controlling at least one of temperature and humidity of air supplied to the inner chamber; exhaust means for discharging air from the double chamber;
• a ventilation amount adjusting means for adjusting the ventilation amount of the air in the inner chamber.
• the inner chamber is protected by the outer chamber by adopting the double chamber structure, the temperature and humidity of the air supplied to the inner chamber are adjusted by the air conditioning means, and the ventilation amount adjusting means is adjusted.
• air is exhausted from the inner chamber so that the desired ventilation rate is obtained, so that objects such as building materials, furniture, and electric appliances are actually constructed (installed) while preventing the external environment from affecting the inner chamber.
• Environmental conditions close to those in the room can be realized, and more realistic and reliable data on chemical emissions can be collected.
• one end of the double chamber is connected to the outer chamber, and the other end is Preferably has a relay path connected to the inner chamber, and a part of the air supplied to the outer chamber by the air supply means is preferably supplied to the inner chamber via the relay path.
• the middle passage has a chemical substance removing means for removing a chemical substance contained in the air flowing into the middle passage from the outer chamber 1 and is connected to the outer chamber 1 on the downstream side of the chemical substance removing means. It is branched into a first middle path and a second middle path connected to the inner chamber, and the ventilation control means is preferably provided in the second middle path and preferably includes a loop and a flow meter).
• the back-out means includes a circulation path having both ends connected to the double chamber, a blowing means disposed in the circulation path, and a heating means for heating air in the circulation path. ,.
• a filter for purifying air and air conditioning means are arranged, an air supply path for supplying clean air to the outer chamber, and a part of air in the outer chamber is supplied to the inner chamber.
• clean air that has been cleaned by a filter and adjusted to the target temperature or humidity by the air conditioning means is supplied into the outer chamber through the air supply passage.
• a part of the air in the outer chamber 1 flows into the relay passage, where the chemical substance is removed by the chemical substance removing means.
• Part of the air from which the chemicals have been removed is supplied to the inner chamber, and the rest is returned to the outer chamber via the return path.
• the air supplied into the inner chamber 1 is exhausted through the exhaust path.
• the method of the present invention comprises the steps of: supplying air into the double chamber by the air supply means through the air conditioning means; adjusting the ventilation volume of the inner chamber by the ventilation volume adjusting means; And a step of collecting, under the controlled environmental conditions, the chemical substance emitted from the object by the collecting device.
• the ventilation control means is 0.1% of the inner volume of the inner chamber. It is particularly preferable to adjust the ventilation volume of the inner chamber so that twice to twice the amount of air is exhausted per hour.
• the single chamber is connected to the outer environment.
• the effect of the external environment on the inside of the inner chamber is extremely small compared to the case of exposure, and as a result, reliable data on the collection of polluting chemicals can be obtained stably.
• the above method further includes a step of baking out the inside of the double chamber with the warm air of 50 to ⁇ ° C provided from the above-mentioned baking means after collecting the chemical substances.
• the inside of the double chamber can be effectively cleaned, and the time required for cooling the double chamber can be shortened as compared with the case where the vacuum is applied at a higher temperature. Efficient collection of chemical substances while maintaining regular maintenance. Furthermore, dangerous cleaning work at high temperatures can be avoided.
• FIG. 1 is a schematic diagram showing a system for collecting chemical substances emitted from an object according to a preferred embodiment of the present invention.
• FIG. 2 is a sectional view showing the double chamber 1 of the above embodiment.
• FIG. 3 is an explanatory diagram of a warm-up operation using the system of the above embodiment.
• FIG. 4 is an explanatory diagram of a main operation for collecting chemical substances using the system of the above embodiment.
• FIG. 5 is an explanatory diagram of a bake-out operation using the system of the above embodiment.
• the system for collecting chemical substances emitted from a target includes an inner channel, an inner channel 1 in which a collecting device for the target and the chemical substance are arranged, and an inner channel.
• Air supply means 8 for supplying air into the double chambers 1 and 4 comprising the outer chambers 3 containing the inner chambers so that a space is formed between Air conditioning means (6, 14) for adjusting the temperature and humidity of the air supplied to the inner chamber; exhaust means 9 for discharging air from the inner chamber; and adjusting the ventilation volume of the inner chamber.
• the inner chamber 1 and the outer chamber 1 3 may be made of a material that does not affect the collection of chemical substances, for example, a material that does not contain an organic compound such as toluene, and is appropriately selected according to the chemical substance to be collected. .
• a material that does not contain an organic compound such as toluene for example, it is preferable that the inner surface and the outer surface of the inner chamber 12 and the inner surface of the outer chamber 13 are polished and welded with a stainless steel plate, and 75 are used.
• the inner chamber 1 2 may have a structure that reproduces the interior space of an actual building room.
• the size of the inner chamber 1 is 3.15 m in length and 3 in width. It is 15 m X height 2.2 m 2 21.8 m 3 .
• the dimensions of the outer chamber 13 are determined so that the inner chamber 1 can be completely accommodated, and a predetermined space is formed between the outer chamber and the inner chamber.
• the outer chamber 3 is made to have a heat insulating structure so that the inside of the outer chamber 3 is not easily affected by the external environment.
• the inner channel If the object 1 that emits chemical substances is a building material such as a wall material / ceiling material, the inner channel
• a building material holding means 16 for attaching the building material to the inner wall surface and the ceiling surface in the same manner as in the actual construction state.
• a pair of holding metal members 16a having the L-shaped cross section as the building material holding means 16 are provided in the internal chamber 1 so as to face each other, these holding metal members 1
• 6a a plate-like building material can be easily installed in the inner chamber.
• the inner chamber 1 and the outer chamber 1 may be provided with doors for access.
• the supply air supply means 8 for supplying clean air into the double chamber 14 includes an air supply passage 11 in which the filter 5 and the first air conditioner 6 are provided. Including. That is, the air supply passage 11 has one end connected to the filter 5 and the other end connected to the outer channel.
• the first air conditioner 6 includes an air conditioning unit 1 having a heating unit 17a, a cooling unit 17b, and a fan 1c, and a heating unit 18 different from the air conditioning unit 17; It consists of 19 fans. From the viewpoint of preventing contamination of the air supplied to the inner chamber 12, the first air conditioner 6 is desirably formed of a material that does not contain an organic compound such as toluene.
• the filter 5 is mainly used for removing solid particles such as dust and microorganisms, and a filter (for example, an HEPA filter) made of a nonwoven fabric made of glass fiber containing borosilicate glass as a main component is used.
• a filter for example, an HEPA filter
• the removal efficiency varies depending on the average thickness and density of the glass fiber, a material that can be removed according to the particle size of the dust can be appropriately selected and used.
• the middle path has one end connected to the outer chamber 13 and the other end connected to the inner chamber 13.
• the relay path 13 has a chemical substance removing means 7 for removing a chemical substance contained in the air flowing into the middle path from the outer chamber 1 and a humidity control means for adjusting the humidity of the air supplied from the chemical substance removing means.
• a second air conditioner 14 and a supply control unit 22 for controlling the amount of air to be supplied to the inner chamber out of the air supplied from the second air conditioner are provided.
• the chemical substance removal means consists of a chemical substance removal department a and a fan b.
• the chemical substance removal section 7a is a device that removes chemical substances from the air that flows into the relay route.
• an adsorption device using an adsorbent such as activated carbon which has a high adsorption effect and generates less dust can be used.
• the second air conditioner 14 located downstream of the chemical substance removing means 7 of the relay path 13 includes a humidifier for humidifying the air purified by the chemical substance removing means 7.
• This humidifier comprises a humidifying section 14a to which pure water is supplied and a drain 14b.
• the supply control unit 22 located downstream of the second air conditioner 14 in the relay path 13 includes a first manifold 25, a second manifold 26, and a first manifold 2.
• 3 ⁇ b, 3 ⁇ c, 30 d, 3 ⁇ e, 2nd manifold 2 6 It is composed of a connecting pipe 21 connecting the inner chamber 1 and the inner chamber 1 and a flow meter 45 provided in the connecting pipe 21.
• valves 30a, 3b, 30c and the flow meter 45 function as ventilation amount adjusting means for adjusting the ventilation bolt of the inner chamber.
• reference numeral 20 denotes a valve provided upstream of the chemical substance removing means 7 of the relay passage 13
• reference numeral 23 denotes a valve immediately before the supply control unit 22 of the relay passage 13.
• the dew point temperature detectors 23 are arranged.
• the return path 12 has one end connected to the outer chamber 1 and the other end connected to an air supply path 11 between the filter 5 and the first air conditioner 6.
• the exhaust means 9 for exhausting air from the double chamber 14 includes a first exhaust path 31 and a second exhaust path 32, both of which are inner chambers for exhausting the air in the inner chamber 2 to the outside. Only connected to member 2. Therefore, in the present embodiment, the air is not directly discharged from the outer chamber 3 to the outside. In other words, air flows through the route of external air—outer chamber 1 3 ⁇ inner chamber—2 ⁇ exhaust means 9 ⁇ outside.
• the first exhaust path 3 1 is provided with a valve 33, a humidity detector 34, and a temperature detector 35
• the second exhaust path 32 is provided with a valve 36 and an exhaust fan 37.
• the other end of the outside air suction pipe 38 whose one end is open to the outside air is connected between the knob 36 and the exhaust fan 37.
• the baking means 10 includes a hot air blower 15 arranged in the circulation path 39 to provide warm air at 50 to 0 ° C.
• the hot air blower 15 includes a heater 15a and a fan 15b.
• One end (upstream end) of the circulation path 39 is composed of a pair of branch paths (40a, 40b), which are respectively connected to the outer chamber and the inner chamber, and the other end (downstream end) is also a pair. It is composed of branch paths (39a, 39b), which are connected to one outer chamber and one inner chamber, respectively.
• An additional air supply path 40 is connected to the circulation path 39 on the upstream side of the hot air blower 15.
• the other end of the additional air supply path 4 ⁇ ⁇ ⁇ is connected to the outlet side of the filter 5.
• numbers 41 and 42 indicate valves provided in the circulation path
• numbers 43a, 43b, 43c, 44a, 44b, 44c, 44d, and 44e indicate valves. Each shows a damper.
• the operation mode of the system configured as described above has three operation modes: a warm-up operation, a main operation, and a vacuum operation. The following describes each operation mode in detail.
• Warm-up operation The warm-up operation is performed before the start of the main operation for collecting chemical substances.
• Fig. 3 shows the flow of warm-up operation.
• a thick line indicates a pipeline in which air is flowing
• a thin line indicates a pipeline in which air is not flowing.
• the dampers 43a, 43c, the valves 20, 30d, 33 are in a predetermined open state, and the valves 30a, 3b, 3b are open.
• c, 30e, 41, 42, 36, dampers 44a, 44b, 44e are closed.
• the dampers 43b, 44c and 44d are kept open without operation.
• the opening and closing of the valve and the damper are set in this way, and the first air conditioner 6, the second air conditioner 14 and the chemical substance removing means 7 are turned on to perform the warm-up operation.
• the hot air blower 15 and the fan 3 of the vacuum means 10 are off.
• the external air sent through the air supply passage 11 is cleaned through the filter 5 and the temperature of the first air conditioner 6 is adjusted to the target temperature.
• the clean air obtained by air conditioning is supplied into the outer chamber 13.
• Part of the air in the outer chamber 1 3 is returned to the first air conditioner 6 again from the return path 12, passes through the filter 5, is mixed with the external air, and is again passed through the first air conditioner 6.
• the fan 7 b provided in the relay path 13 a part of the air in the outer chamber 13 flows into the relay path 13, and the air flowing through the relay path 13 by the chemical substance removing means 7. The chemicals inside are removed.
• the air from which the chemical substances have been removed passes through the second air conditioner 14 and is sent to the supply control unit 22, through the first manifold 25 and the connection pipe 28 of the supply control unit 22. And supplied into the inner chamber 12. The air in the inner chamber 12 is discharged to the outside via the first discharge passage 31.
• the inside of the inner chamber 1 and the outer chamber 1 can be cleaned, respectively. Can be filled.
• the TVOC concentration in the system can be adjusted by the chemical substance removing means 7.
• the humidity and the temperature of the air in the inner chamber 12 discharged to the outside through the first exhaust path 31 are provided in the first exhaust path 31 respectively.
• 3 4 Measure with temperature detector 35.
• the first air conditioner 6 is feedback-controlled based on the temperature measured by the temperature ⁇
• the temperature of the supplied air is automatically adjusted.
• the second air conditioner 14 is subjected to feed knock control based on the humidity measured by the humidity detector 34 and the measurement value of the dew point temperature detector 23, so that the second air conditioner 14 is supplied to the internal chamber and the ri I-. Automatically adjusts the humidity of the air. In this way, the warm-up operation adjusts the temperature and humidity of the air in the double chamber 1 to obtain a standby state for the main operation.
• FIG. 4 shows the flow of the main operation.
• a thick line indicates a pipeline through which air is flowing
• a thin line indicates a pipeline through which air is not flowing.
• the dampers 43a and 43c and the valves 20, 30a, 3 ⁇ b, 30c, 30e, and 33 are opened, and the solenoids 30d, 41, 42, 36, and damper 44a are opened.
• the external air sent into the air supply passage 11 is cleaned through the filter 5 so that the temperature of the first air conditioner 6 becomes the target temperature.
• the resulting clean air is supplied to the outer chamber 13 after being air-conditioned.
• Part of the air in the outer chamber 13 is returned to the first air conditioner 6 from the return path 12 again, mixed with the external air that has passed through the filter 5, and again returned to the outer chamber via the first air conditioner 6.
• Supplied within three Still, by operating the fan 7b provided in the relay path 13, a part of the air in the outer chamber 13 flows into the relay path 13, and the air flows through the relay path 13 by the chemical substance removing means 7. Chemicals are removed.
• the air from which the chemical substances have been removed passes through the second air conditioner 14 and is sent to the supply control unit 22 where the first manifold 25 of the supply control unit 22 and the connection pipes 2a, 27b, 2c After that, the gas enters the second manifold 26, and is then supplied from the second manifold 26 into the inner chamber 12 via the connection pipe 21 and the flow meter 45.
• a part of the air supplied to the supply control unit 22 is also returned from the first manifold 25 to the outer chamber 13 via the connecting pipe 29.
• the air in the inner chamber 12 is discharged to the outside via the first exhaust path 31.
• the humidity and temperature of the air in the inner chamber 12 discharged to the outside through the first exhaust path 31 are provided in the first exhaust path 31 respectively.
• 3 4 Measure with temperature detector 35.
• the temperature of the air supplied to the outer chamber 1 is automatically adjusted by performing feedback control of the first air conditioner 6 based on the temperature measured by the temperature detector 34.
• the second air conditioner 14 is feedback-controlled based on the measured values of the humidity and dew point temperature detectors 23 measured by the humidity detector 34, thereby automatically controlling the humidity of the air supplied to the inner chamber 1. I am adjusting. Thereby, the inside of the inner chamber 12 and the outer chamber 13 can always be maintained at desired environmental conditions.
• the amount of air supplied into the inner chamber 12 is monitored by the flow meter 45, and the valves 3a, 30b, and 30c are set based on the monitored air flow rate. Controlled. That is, the air flowing into the supply control unit 22 is connected to the inner chamber through a plurality of connection pipes 27a, 27b, 27c having valves 30a, 30b, 3c, respectively. 2, a desired amount of air can be supplied into the inner chamber 12 by controlling the plurality of valves 3 #a, 3 #b, and 30 c. In the present embodiment, three valves are shown in the figure, but more valves may be provided if necessary. In the embodiment shown in FIG.
• valves 30a, 3 ⁇ b, and 30c are respectively opened, but only the valve 30a is opened to achieve a desired ventilation volume.
• the flow rate may be adjusted with only the valve 30a and the valve 30b being opened.
• the valves 30a, 30b, and 30c are controlled so that the air of 0.1 to 2 times the internal volume of the inner chamber is ventilated for one hour. Is preferred.
• a predetermined amount of clean air from which harmful chemical substances have been removed and the temperature and humidity of which have been adjusted is supplied to the inner chamber 12, and a predetermined amount is supplied from the first exhaust passage 31.
• the desired environmental requirements are reproduced in the inner chamber by discharging air, and contaminated chemical substances emitted from the object 1 placed in the inner chamber 12 under the environmental conditions reproduced in this way.
• any method can be adopted for the subsequent analysis.
• the main operation After the main operation has been performed for a predetermined period of time, if no internal condensation has occurred in the inner chamber 1 and outer chamber 1, the main operation is stopped, and if internal condensation has occurred, the above-mentioned After performing the same operation as the operation for a predetermined time (for example, 1 hour), stop the main operation.
• a predetermined time for example, one hour
• the chemical substance removing means 7 and the first air conditioner 6 are stopped.
• Fig. 5 shows the flow of the basic operation.
• a thick line indicates a pipeline in which air is flowing
• a thin line indicates a pipeline in which air is not flowing.
• the valves 41, 42, 36, and the dampers 44a, 44b, 44e are opened, respectively.
• the valves 20, 30 a, 30 b, 3 ⁇ c, 3 ⁇ d, 30 e, and 33 are closed.
• the dampers 43b, 44c, 44d are kept open without any operation.
• the opening and closing of the valve and the damper are set, and the warm air blower 15 of the baking means 10 and the fan 3 of the second exhaust path 32 are turned on to start the operation.
• the first air conditioner 6, the second air conditioner 14, and the chemical substance removing means 7 are in the off state.
• the inner chamber 1 and the outer chamber 13 can be cleaned to the same level, an environment substantially the same as the environment in the inner chamber 1 is realized in the space between the outer chamber 1 and the inner chamber 1. Therefore, polluted chemicals can be collected under stable conditions that are not easily affected by the external environment.
• the bakeout operation is performed using clean hot air of 50 to 7 ° C, chemical substances adhering and adsorbing to the inner wall surface, floor surface, and top surface of the chamber can be diffused, The propagation of microorganisms can be effectively suppressed. If the temperature is lower than 50 ° C, the basic effect may be reduced. If the temperature is higher than 0 ° C, the time required to cool the double chamber 14 for the next main operation becomes longer. In addition, there is a concern that the risk of work may increase due to the high temperature inside the chamber. From the viewpoint of further improving work safety, when the door of the inner chamber 1 and the door of the outer chamber 13 are open, the hot air blower 15 is not turned on and the bake-out operation cannot be performed. Is preferred.
• an operation unit such as a switch for emergency communication is provided in the inner chamber 1 and inner and outer chambers 1. If an accident occurs in the double chamber 14, It is desirable to operate an operation unit to turn on an alarm device such as an alarm lamp provided outside so that the occurrence of an emergency can be notified so that an emergency can be promptly dealt with.
• object 1 two objects of expanded polystyrene of size 600 x 600 x 2 mm were used as object 1.
• the inside of the inner chamber 1 is set at 25 ° C and the humidity is 5%, and the ventilation volume per hour of the inner chamber 1 is ⁇ .5 times the volume of the inner chamber 1
• Main operation was performed for 24 hours under such conditions.
• it encounters 1 520 ju g / m 3 at seeking T VOC value immediately after the main operation. Compared to the TVOC value immediately after the warm-up operation, it can be seen that the inner chamber is contaminated by the placement of the object.
• the object was removed from the inner chamber and warmed up at room temperature for 7 hours.
• the TVOC value immediately after the warm-up operation was determined to be 250 gZm 3 . Comparing with the TVOC value immediately after the bakeout operation described above, it can be seen that the 7-hour warm-up operation at room temperature cannot clean the inside of the inner chamber to + min. Therefore, it is shown that the bake-out operation at a high temperature of 50 to ⁇ ° C performed during the main operation makes the system of the present invention function more efficiently).
• the inner chamber and the outer chamber for suppressing the influence of the external environment on the inner chamber adopt a double-chamber structure, and the temperature and humidity of the air supplied to the inner chamber are controlled.
• air-conditioning means for adjusting and air-conditioning means capable of ventilating the air in the inner chamber at a desired ventilation rate, for example, near the actual building room, the influence of the external environment
• Environmental conditions similar to actual construction (installation) in a building are reproduced in the inner chamber without collecting the chemical substances emitted from the target under the environmental conditions. can do.

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• 2002
  • 2002-11-22 JP JP2002339945A patent/JP3668474B2/ja not_active Expired - Fee Related
• 2003
  • 2003-11-19 WO PCT/JP2003/014762 patent/WO2004051213A2/ja active Application Filing
  • 2003-11-19 KR KR20057009207A patent/KR100617382B1/ko not_active IP Right Cessation
  • 2003-11-19 AU AU2003284583A patent/AU2003284583A1/en not_active Abandoned

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