KR20030085689A - Lug sampler of odors and vocs using a vacuum pressure and method of the same - Google Patents

Abstract

PURPOSE: An apparatus and method for automatically collecting samples of odors and volatile organic compounds in the air using a vacuum pressure are provided to collect samples easily using the difference between a vacuum pressure in a chamber and an air pressure in a sample collecting bag provided within the chamber. CONSTITUTION: The apparatus comprises: a housing(102) having an air inlet connecting pipe(120) and an exhaust connecting pipe(130), a cover coupling member(116) and a pressure tester(126); a cover(106) with a packing(108) on the lower surface of the circumference; a sample collecting bag(118) mounted to the chamber in the housing(102); a vacuum pump(134) driven by being coupled to the exhaust connecting pipe(130); an air inlet valve(124) provided at the front end of the air inlet connecting pipe(120); and an exhaust valve(131) provided on the rear end of the exhaust connecting pipe(130).

Description

Automatic collection system of samples of odor and volatile organic compounds in the air using vacuum pressure and method therefor {LUG SAMPLER OF ODORS AND VOCS USING A VACUUM PRESSURE AND METHOD OF THE SAME}

The present invention relates to an apparatus for automatically collecting odors and VOCs in the air using a vacuum pressure and a method thereof, and more particularly, by using a pressure difference between the vacuum pressure in the chamber and the atmosphere in the sample collection bag provided in the chamber. The present invention relates to an apparatus for automatically collecting a sample of odors and VOCs in the air using a vacuum pressure to collect a sample and to automatically collect a predetermined amount of samples unattended.

As is well known, the high industrial society has improved the lives of modern people, while environmental destruction by various pollutants generated in the industry is occurring extensively.

Air pollution caused by gaseous substances that can cause various diseases in the human body is a serious situation of environmental pollution occurring as described above.

In order to prevent the air pollution, the gaseous substances contained in the air (air) are collected by a collector to measure the degree of pollution of the air by the gaseous substances, and a countermeasure based on the measurement result is established.

As described above, the collection method for measuring the pollution level of air by sampling (gathering) gaseous substances in the air includes various methods such as a direct collection method, a container collection method, a solvent collection method, a solid collection method, a low temperature condensation method, and a collection site. Although there is a method of collecting a sample, generally, a solvent collection method is widely used.

In general, a widely used solvent collector is a structure capable of sampling only one of the gaseous substances mixed in the atmosphere (air), so that various gaseous substances mixed in the atmosphere (air) are the same as the same point. Each sampler (also called a trap) is used separately to sample in time, which traps the internal material using a number of analyzers that analyze the collected gases and solvents. The instrument is a device capable of analyzing trace collection atmospheres. Because of its unacceptably large volume and weight, the instrument is placed in a separate container with a trap in which the sample atmosphere is collected, and then a remote laboratory equipped with an analyzer. There is a problem that must be moved to.

In this process, the sample may be lost or the reaction between the samples may occur. If the container for collecting the sample is attached to the rear end of the pump, the sample may be attached on the inflow path of the pump. There is a problem that is difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described prior art, and in the air using a vacuum pressure for easily collecting a sample by using a difference between the vacuum pressure in the chamber and the atmospheric pressure in the sample collection bag provided in the chamber. It is an object of the present invention to provide a method and an automatic sample collection device of odor and VOC.

Another object of the present invention is to provide an apparatus and a method for automatically collecting a sample of atmospheric odor and VOC using a vacuum pressure to automatically collect a certain amount of samples in an unattended state.

1 is a perspective view showing the appearance of the automatic collection device of the sample of odor and VOC in the air using a vacuum pressure according to a first embodiment of the present invention,

FIG. 2 is a perspective view illustrating an external appearance of an automatic sample collection device for odors and VOCs in the air using a vacuum pressure according to a second embodiment of the present invention; FIG.

3 is a plan view showing an automatic sample collection device of the odor and VOC in the air using a vacuum pressure according to a second embodiment of the present invention,

Figure 4 is a block diagram showing the circuit configuration of the automatic sample collection device of the odor and VOC in the air using a vacuum pressure according to a second embodiment of the present invention,

5A and 5B are state diagrams illustrating a state of collecting a sample of an air odor and VOC's automatic sample collection device using a vacuum pressure according to a second embodiment of the present invention;

FIG. 6 is a flowchart illustrating a signal flow of an automatic sample collection device for odors and VOCs in the air using a vacuum pressure according to a second embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

102: housing, 106: cover,

118: sample collection bag, 120: intake connector,

124, 124 ': intake valve, 126: pressure gauge,

131,131 ': discharge valve, 134: vacuum pump,

140: contact sensor, 152: control unit.

In order to achieve the above object, according to a preferred embodiment of the present invention, the upper surface is opened and the intake connecting pipe for intake and the discharge connecting pipe for discharge respectively are respectively cast on both sides, the cover coupling member on the upper inner edge portion; Is formed, and a housing having a pressure gauge mounted on one side thereof; A cover coupled to an upper open surface of the housing and having a packing attached to a lower surface thereof; A sample collecting bag seated in an inner chamber of the housing and coupled to the intake connecting tube to be pressurized with the atmosphere outside the chamber; A vacuum pump which is coupled to the discharge connection tube and driven to reduce the internal pressure of the chamber; An intake valve provided at a front end of the intake connecting pipe to control intake of air by opening and closing the intake pipe; It is provided at the rear end of the discharge connection pipe, it is composed of a discharge valve for controlling the discharge of the atmosphere by the opening and closing of the atmosphere using the vacuum pressure, characterized in that to collect the sample by the pressure difference in the chamber and the sample collection bag Automatic collection of samples of heavy odor and VOC is provided.

Preferably, a control panel including a key operating unit for generating a driving key signal and a control unit for automatically driving and controlling the intake valve, the discharge valve, and the vacuum pump by receiving pressure data for each hour from the pressure gauge. Provided is an automatic sample collection device for odors and VOCs in the atmosphere using vacuum pressure.

More preferably, there is provided an automatic sample collection device for odors and VOCs in the atmosphere using a vacuum pressure, characterized in that a contact sensor for detecting a contact state with the sample collection bag is attached to the inner wall of the housing, respectively.

On the other hand, the present invention is located in the chamber of the sample collection bag, the sample collection method of the sample collection device in a state in which the intake connecting tube is coupled to the front end of the sample collection bag, the user of the sample collection drive operation signal is generated Process; A process of automatically closing a suction valve according to a sample collection setting process; Opening the discharge valve; Depressurizing the inside of the chamber by driving a vacuum pump; Closing the discharge valve; Stopping driving of the vacuum pump; Opening the intake valve to collect a constant flow rate of air into the sample collection bag; Generating a touch detection signal by pressing the contact sensor attached to the inner surface of the chamber by the sample collecting bag; Provided is a method for automatically collecting samples of odors and VOCs in the atmosphere using vacuum pressure, which comprises a process of closing the intake valve.

Preferably, the process of closing the intake valve is provided with a method for automatically collecting samples of atmospheric odor and VOC using the vacuum pressure, characterized in that when the detection signal is generated from at least two or more contact sensors.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail with reference to drawings.

1 is a perspective view showing the external appearance of the automatic collection device of the sample of odor and VOC in the air using a vacuum pressure according to a first embodiment of the present invention.

Referring to this, the automatic sample collection device 100 of the air odor and VOC using the vacuum pressure according to the first embodiment of the present invention is made of an outer housing 102 of the rectangular box shape, the outer housing The top surface of 102 is open and has a single chamber therein.

In addition, a cover 106 for selectively closing the open surface of the outer housing 102 is provided, the cover 106 is made of a glass material, a transparent Teflon material, or a transparent acrylic material, the cover ( The supporting member 104 of a predetermined strength or more is attached to the edge of the 106, and the packing member 108 is attached to the lower surface of the supporting member 104.

On the other hand, a single through hole 110 is formed in each corner of the cover 106, and the inner side of the outer housing 102, while the lower side of the through hole 110, a predetermined depth female screw hole in the center The poured support extension surface 112 protrudes. The fixing member 114 is coupled to the female screw hole placed in the center of the support extension surface 112 from the upper side of the through hole 110 is provided.

In addition, the pressure measuring instrument 126 is mounted through a through hole (not shown) formed on one side of the outer housing 102, and the measuring tube 128 extending from the pressure measuring instrument 126 through the through hole. It protrudes to the chamber side.

Next, a connection pipe 120 penetrating the inside and the outside of the chamber is poured into a predetermined portion of one side of the outer housing 102, and the manual valve 122 and the automatic suction valve 124 are provided in the chamber outer connection pipe 120. Are respectively mounted, and one end of the intake pipe 125 whose other end is drawn out to the sample collection target position is coupled to the front end of the automatic suction valve 124.

In addition, the chamber inner connection pipe 120 is provided with a sample collecting bag 118, one end of which is connected to the connection pipe 120 through a separate coupling member 116. Therefore, this is a structure in which the atmospheric sample introduced through the intake pipe 125 flows only into the sample collection bag 118.

On the other hand, one side of the outer housing 102, the connection pipe 130 penetrates the interior and exterior of the chamber is poured, and the chamber outer side connection pipe 130 to discharge the air to control the air flow of the connection pipe 130 A valve 131 is formed, and the other end of the outlet valve 131 is coupled to the other end of the outlet pipe 132, one end of which is coupled to the inlet 136 of the vacuum pump 134. In addition, one end of the discharge pipe 136 is coupled to a predetermined portion of the vacuum pump 134.

As a result, the atmosphere in the chamber is forced out of the chamber through the vacuum pump 134 so that the inside of the chamber may be in a vacuum state.

Accordingly, the apparatus for automatically collecting odors and VOCs in the air using the vacuum pressure according to the first embodiment of the above structure opens the discharge valve 131 in a state where the manual valve 122 is closed and a vacuum pump ( In operation 134, since the atmosphere inside the chamber is unilaterally discharged, the inside of the chamber is in a vacuum state after a predetermined time has elapsed. This can be confirmed through the pressure gauge 126.

That is, after confirming that the state inside the chamber is a vacuum through the pressure gauge 126, the user closes the discharge valve 131 and stops the driving of the vacuum pump 134.

Then, when the manual valve 122 is opened and the internal needle valve (not shown) of the suction valve 124 provided at the front end is set to open by a predetermined value, the pressure inside the chamber and the pressure outside the chamber are set. By the difference, the air of a constant flow rate is collected into the sample collection bag 118 through the intake pipe 125.

Figure 2 is a perspective view showing the appearance of the automatic collection device of the sample of odor and VOC in the atmosphere using the vacuum pressure according to a second embodiment of the present invention, Figure 3 is a vacuum pressure according to a second embodiment of the present invention It is a top view which shows the sample collection apparatus of odor and VOC sample in air | atmosphere. Hereinafter, a description of the reference numeral duplicated with FIG. 1 will be omitted.

Referring to this, the apparatus for automatically collecting a sample of air odor and VOC in the air using the vacuum pressure according to the second embodiment of the present invention 100 'is a certain amount of unmanned state even if the user performs a simple driving key operation and leaves the corresponding position. It is a device that can automatically collect samples.

More specifically, the air odor and the VOC automatic collection device 100 'of the sample using the vacuum pressure is provided with a suction valve 124' driven by a solenoid in front of the manual valve 122, the outside of the chamber A discharge valve 131 ′ is installed on the side connection pipe 130 to control the air discharge in the chamber.

On the other hand, the contact sensor 140 is attached to each of the four inner surface of the chamber, and controls the intake valve 124 and the discharge valve 131 'on one side of the outer housing 102, the contact sensor ( Receives a detection signal from the 140, and a control panel 138 for controlling the driving of the vacuum pump 134 is provided. Preferably, the pressure gauge 126 is a digital pressure gauge and may transmit pressure data in the chamber detected from the pressure gauge 126 to the control panel 138.

4 is a block diagram showing a circuit configuration of an automatic sample collection device for odors and VOCs in the air using a vacuum pressure according to a second embodiment of the present invention.

Referring to this, in the air odor and VOC sample collection device 100 'using the vacuum pressure according to the second embodiment of the present invention, the key operation unit 142 for generating a sample collection driving key signal is the control panel And a pressure sensing unit (the pressure gauge 126 ') configured to sense the pressure in the chamber and apply the detection signal to the control panel 138 side.

In addition, a pump driver 144 for driving the vacuum pump 134 is provided, and drives the opening and closing of the discharge valve driver 146 and the suction valve 124 'for driving the opening and closing of the discharge valve 131'. Suction valve driving unit 124 'is provided, respectively.

Meanwhile, a data storage unit 150 for storing the open set value data of the intake valve 124 'and the discharge valve 131' is provided through the key operation unit 142, and is driven from the key operation unit 142. The driving control is performed by receiving a signal, and the vacuum pump 134 and the suction and discharge valves 124 are received from the contact sensor 140 and the pressure sensing unit 126 ′ by receiving a touch sensing signal and a pressure sensing signal inside the chamber. And a control unit 152 configured to control unattended sample collection by controlling each of ', 131'.

5A and 5B are state diagrams illustrating a state of collecting a sample of an air odor and VOC's automatic sample collection device using a vacuum pressure according to a second embodiment of the present invention.

Referring to this, the automatic collection device 100 'of the air odor and VOC sample using the vacuum pressure according to the second embodiment of the above structure is a user control panel 138 with the manual valve 122 closed The intake valve 124 'is automatically closed when the key operation unit 142 formed in the control unit generates a driving key signal.

Then, the discharge valve 131 'is opened and the vacuum pump 134 is driven. As the atmosphere inside the chamber is unilaterally discharged by the driving of the vacuum pump 134, the chamber interior becomes a vacuum state after a predetermined time has elapsed. At this time, since the pressure signal in the chamber is applied to the control unit 152, the control unit 152 determines whether the inside of the chamber is sufficiently decompressed compared with the preset value.

After confirming that the state inside the chamber is a vacuum through the pressure sensing unit 126 ', the discharge valve 131' is closed and the driving of the vacuum pump 134 is stopped.

In addition, the suction valve 124 ′ is opened so that the air having a constant flow rate is collected into the sample collection bag 118 through the intake pipe 125 due to the pressure difference inside the chamber and the pressure outside the chamber.

Thus, the sample collecting bag 118 is inflated by the volume of the collected sample, if the amount of the collected sample is a certain amount as shown in Figure 5b, the sample collecting bag 118 is the inner surface of the chamber Pressurize the contact sensor 140 attached to each. Therefore, the touch sensor 140 generates a touch detection signal, and the control unit 152 receives the detection signal to close the suction valve 124 '.

Through this, the air odor and the automatic sample collection device (100 ') of the VOC using the vacuum pressure is able to automatically collect the effective sample even in an unattended state. In particular, when the sample is collected for a long time in the case of collecting the atmospheric sample, the present invention is very effective because the sample can be collected in an unattended state for a long time.

With reference to the accompanying drawings will be described in detail with reference to the accompanying drawings the function and action of the sample of the odor in the atmosphere and VOC using the vacuum pressure according to an embodiment of the present invention.

FIG. 6 is a flowchart illustrating a signal flow of an automatic sample collection device for odors and VOCs in the air using a vacuum pressure according to a second embodiment of the present invention.

First, the cover 106 of the automatic sample collecting device 100 'is opened, and then, the sample collecting bag 118 is positioned inside the chamber, and the coupling member 116 formed at the front of the sample collecting bag 118 is removed. It is connected to the connector 120.

In this state, when the manual valve 122 is closed and the user operates the key operation unit 142 formed on the control panel 138 to generate a driving key signal, the controller 1520 is connected to the intake valve 124 '. A control signal is generated to close the intake valve 124 '(first step: ST-1).

The controller 152 opens the discharge valve 131 ′ (second step: ST-2) and drives the vacuum pump 134 (third step: ST-3). As the atmosphere inside the chamber is unilaterally discharged by the driving of the vacuum pump 134, the chamber interior becomes a vacuum state after a predetermined time has elapsed. At this time, since the pressure signal in the chamber is applied to the control unit 152, the control unit 152 determines whether the inside of the chamber is sufficiently depressurized and compared with a preset value (fourth step: ST-4).

When the pressure signal generated by the pressure sensing unit 126 'is equal to or less than a preset value, the controller 152 closes the discharge valve 131' and stops the driving of the vacuum pump 134 (step 5). : ST-5).

Then, the suction valve 124 'is opened so that the air of a constant flow rate is collected into the sample collecting bag 118 through the intake pipe 125 due to the pressure difference inside the chamber and the pressure outside the chamber. Step 6: ST-6).

As the sample is collected into the sample collecting bag 118, the sample collecting bag 118 presses the contact sensors 140 respectively attached to the inner surface of the chamber. When the detection signal is generated in the contact sensor 140 (step 7: ST-7), when the contact detection signal is generated, it is determined that the sample is sufficiently collected in the sample collecting bag 118 and the suction is performed. Close the valve 124 '(step 8: ST-8).

Preferably, since the contact sensor 140 is attached to each of four side surfaces of the chamber, when at least two contact detection signals are generated, the intake valve 124 'may be closed.

On the other hand, the automatic collection device of the odor and VOC sample in the air using the vacuum pressure and the method according to an embodiment of the present invention is not limited to the above-described embodiment and various changes within the scope not departing from the technical gist. It is possible.

As described above, the apparatus for automatically collecting the sample of air odor and VOC using the vacuum pressure according to the present invention and the method are very effective by collecting the sample through the pre-cleaned connecting pipe, using the pressure difference outside the chamber Samples can be collected. In addition, the input of the pressure signal, and the electronic control of the intake, discharge valves, and vacuum pump is possible, there is an effect that can accurately collect a certain amount of sample collection automatically in an unattended state.

Claims (5)

A housing having an upper surface open and an intake connecting pipe for intake and an exhaust connecting pipe for discharging respectively disposed on both sides thereof, and a cover coupling member formed on an upper surface of an inner edge thereof, and a pressure measuring device mounted on one side thereof; A cover coupled to an upper open surface of the housing and having a packing attached to a lower surface thereof; A sample collecting bag seated in an inner chamber of the housing and coupled to the intake connecting tube to be pressurized with the atmosphere outside the chamber; A vacuum pump which is coupled to the discharge connection tube and driven to reduce the internal pressure of the chamber; An intake valve provided at a front end of the intake connecting pipe to control intake of air by opening and closing the intake pipe; It is provided at the rear end of the discharge connection pipe, it is composed of a discharge valve for controlling the discharge of the atmosphere by the opening and closing of the atmosphere using the vacuum pressure, characterized in that to collect the sample by the pressure difference in the chamber and the sample collection bag Automatic collection system of heavy odor and VOC sample. According to claim 1, wherein one side of the housing is configured with a key operation unit for generating a drive key signal, and a control unit for automatically driving and controlling the intake valve, discharge valve, vacuum pump receiving the hourly pressure data from the pressure gauge Automatic collection system of samples of odors and VOCs in the atmosphere using vacuum pressure, characterized in that the control panel is mounted. The apparatus of claim 1, wherein a contact sensor for detecting a contact state with the sample collecting bag is attached to an inner wall of the housing, respectively. In the sample collection method of the sample collection apparatus in which the sample collection bag is located inside the chamber, and the intake connecting pipe is coupled to the front end of the sample collection bag, Generating a sample collection driving operation signal by a user; A process of automatically closing a suction valve according to a sample collection setting process; Opening the discharge valve; Depressurizing the inside of the chamber by driving a vacuum pump; Closing the discharge valve; Stopping driving of the vacuum pump; Opening the intake valve to collect a constant flow rate of air into the sample collection bag; Generating a touch detection signal by pressing the contact sensor attached to the inner surface of the chamber by the sample collecting bag; A method for automatically collecting samples of odors and VOCs in the air using a vacuum pressure, characterized in that the closing of the intake valve. 5. The method of claim 4, wherein the closing of the intake valve is closed when a detection signal is generated from at least two contact sensors.