JPH0545349A - Low temperature smell condensing/collecting apparatus - Google Patents

Abstract

PURPOSE:To obtain a low temperature smell condensing/collecting apparatus which is inexpensive and easy to transfer and able to analyze bad smell with high accuracy. CONSTITUTION:This smell collecting apparatus is comprised of a cooling medium container 11, a condensation pipe 2 and a suction pump 5. The cooling medium container 11 is a sealed one having a cooling mecium injection port 13, a cooling medium discharge port 14 and the condensation pipe 12. A heating thermocouple should not be wound in the periphery of the straight condensation pipe 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low temperature concentrated odor collecting device for collecting odorous components for gas chromatography analysis.

[0002]

2. Description of the Related Art When the hydraulic oil of a hydraulic elevator deteriorates due to thermal decomposition or oxidation, it may generate offensive odor gases such as carbon dioxide and hydrogen sulfide, which may cause passenger discomfort. In order to prevent such inconvenience, odors in the car, in front of the hall and in the tower hoistway have been regularly collected, gas chromatographic analysis is performed, and the deterioration state of the hydraulic oil is inspected.

As shown in FIG. 4, the conventional odor collecting device has a collecting box 3 provided with an odor intake port 1 and an exhaust port 2, an odor collecting bag 4 attached to one end of the odor intake port 1 and the exhaust gas. It is composed of a suction pump 5 connected to the mouth 2. This odor collecting device stores a completely evacuated odor collecting bag 4 in a collection box 3, connects its intake port to the odor intake port 1, and drives the suction pump 5 to cause a negative inside of the collection box 3. Since the pressure increases, the odor is taken into the odor collecting bag 4.

As shown in FIG. 5, the deodorizing bag 4 is provided at both ends of a concentrating pipe 7 immersed in a refrigerant container 6 in which a cooling medium such as liquid argon, liquid nitrogen or liquid oxygen is stored.
The suction / exhaust port of 1 is connected to the suction pump 5, and the suction pump 5 is driven to introduce the gas collected in the odor collecting bag 4 into the concentration tube 7. The concentration tube 7 is filled with a filler composed of a substance that easily adsorbs odorous components. By introducing the components in the odor collecting bag 4 into the concentration tube 7 as described above, the collected odor is collected. The components can be adsorbed on the filler. Thereafter, the components discharged from the concentrating pipe 7 are heated while being heated by the concentrating pipe 7 in which the odorous components are taken in and the heater 8 wound around the concentrating pipe 7 to identify, quantify and operate the odorous components. The degree of oil deterioration can be detected.

[0005]

However, in the odor collecting method using the odor collecting device, a gas containing odor is collected in the odor collecting bag 4 and transferred to a place where chromatography is installed. Since the gas in the odor collecting bag 4 is introduced into the concentrating tube 7, most of the odorous components having strong adsorptivity are adsorbed on the inner wall surface of the odor collecting bag 4, and There is an inconvenience that the residual amount of the odorous component in the gas becomes small and the odorous component analysis with high accuracy cannot be performed.

Further, as shown in FIG. 5, since an expensive concentrating tube which is formed in a U shape and around which the peripheral heater 8 is wound must be used, there is a disadvantage that the equipment cost becomes expensive.

The present invention has been made in order to solve the above inconveniences, and an object of the present invention is to provide an odor collecting device capable of performing highly accurate odor analysis using a simple and inexpensive device. And

[0008]

In order to achieve the above object, the present invention connects a suction pump to the end of a concentrating tube in which a filler for adsorbing odorous components is enclosed, and while suctioning by this suction pump. In a low-temperature concentrating and deodorizing device for concentrating and collecting odorous components by cooling the concentrating tube from the surroundings, the concentrating tube has a straight tubular shape, and both ends can be opened and closed, and the straight tubular concentrating tube can be accommodated. Equipped with one or more concentrating tube storage holes and a cooling medium inlet / outlet, and equipped with a sealable refrigerant container for storing the cooling medium inside, and inserting cooling tubes into the concentrating tube storage holes to continue cooling. However, the odor collecting and concentrating tubes can be transferred.

[0009]

With the above structure, the refrigerant container can be brought into the odor collecting site together with the concentrating pipe and the suction pump. Therefore, at the odor collecting site, the odorous components can be concentrated at a low temperature directly into the concentration tube, which prevents the odorous components from adsorbing to the inner wall surface of the odor collecting bag, which is highly accurate, as when collecting in the odor collecting bag. Odor analysis can be performed.

Further, since the concentrating tubes are straight tubes, it is possible to take out the concentrating tubes and introduce the concentrating tubes by heating using the heating means equipped in the gas chromatography. Therefore, a heater is provided for each concentrating tube. There is no need. This makes it possible to reduce equipment costs.

Further, since it is sufficient to bring only the refrigerant container, the concentrating pipe and the suction pump into the odor collecting site, the workability can be improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a front view of the refrigerant container, FIG. 2 is a vertical sectional view of the center of the refrigerant container (the AA 'portion in FIG. 1), and FIG. 3 is a sectional view of the concentrating tube.

As shown in FIG. 2, the odor collecting device of this embodiment comprises a refrigerant container 11, a concentrating pipe 12 and a suction pump 5. As shown in FIGS. 1 and 2, the refrigerant container 11 is a hermetically sealed container having a refrigerant inlet 13 and a refrigerant outlet 14 on its upper surface. The refrigerant inlet 13 has a cap 1
5 is attached so that the refrigerant inlet 13 can be opened and closed as needed. On the other hand, the refrigerant discharge port 14 is provided with a valve 16 so that the refrigerant discharge port 14 can be opened and closed as required. Further, the refrigerant container 11 is provided with a plurality (four in this embodiment) of concentrating tube accommodation holes 17 penetrating from the top surface to the bottom surface. A cooling medium such as liquid argon, liquid nitrogen, or liquid oxygen is enclosed in the refrigerant container 11.

In order to efficiently cool the concentration tube 12, the refrigerant container 11 is formed of a good heat conductor at least around the concentration tube accommodation hole 17. The entire refrigerant container 11 may be made of a good heat conductor, and in this case, a heat insulating material is wound around it for easy handling.

The concentrating tube 12 is formed in a straight tube shape having a diameter and a length that can be accommodated in a concentrating tube accommodation hole 17 formed in the refrigerant container 11, and a desired filler 18 and the desired filler 18 are contained therein. A breathable glass silica 19 for preventing the falling off of 18 is attached. Caps (FIG. 3) are attached to both ends of the concentrating tube 12, and when collecting odors, a needle is inserted into the cap so that an odorous component can be introduced into the concentrating tube 12 through a hole in the needle.

The odor collecting procedure by the odor collecting device according to the above embodiment will be described below. First, the valve 16 is opened to inject the cooling medium liquid into the refrigerant container 11 through the refrigerant inlet 13. After injecting a predetermined amount, the cap 15 is placed in the refrigerant inlet 13.
And the valve 16 of the refrigerant outlet 14 is closed. Next, the concentration tube 12 is accommodated in the accommodation hole 17 of the refrigerant container 11, and the concentration tube 12 is cooled from its surroundings to a predetermined temperature. Then, the suction pump 13 is attached to one end of the concentrating tube 12.
Connect. Then, the suction pump 13 is driven to adsorb a predetermined amount of odor into the concentration tube 12.

After the completion of odor collection, the concentration tube 12 is brought back with it being accommodated in the accommodation hole 17, the concentration tube 12 is taken out from the refrigerant container 11, and the odor analysis is performed by gas chromatography.
When the cooling medium in the refrigerant container evaporates and vapor pressure rises during the transfer, the valve is opened to release the gas of the cooling medium.

As described above, according to this embodiment, the refrigerant container 11 has a closed structure, the concentrating tube 12 is a straight tube, and the concentrating tube is removable.
You can bring in a condenser tube directly at the odor collecting site 1
The odorous component can be concentrated at low temperature. Therefore, as compared with the case of collecting the odorous components in the odor collecting bag, the odor can be collected without loss of the odorous components, so that the odor analysis can be performed with extremely high accuracy. Further, since the plurality of concentrating tubes 12 can be accommodated in the refrigerant container 11, the entire apparatus can be configured compactly, the transfer is facilitated, and the workability is improved. Furthermore, since the straightening tube is used and a concentrating tube not using the heater 8 is used, the equipment can be made inexpensive.

[0020]

As described above, according to the present invention,
Highly accurate odor analysis can be performed because odors can be directly collected in the concentration tube at the odor collection site and can be moved to a place to be analyzed in a low temperature state.

[Brief description of drawings]

FIG. 1 is a plan view of a refrigerant container showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA ′ when the concentrating tube is attached to the refrigerant container showing the embodiment of the present invention.

FIG. 3 is a sectional view of a concentrating tube showing an embodiment of the present invention.

FIG. 4 is an explanatory diagram of a conventional odor collecting device.

FIG. 5 is an explanatory diagram of a conventional low temperature concentrator.

[Explanation of symbols]

 11 Refrigerant Container 12 Concentrating Tube 13 Refrigerant Inlet 17 Concentrating Tube Accommodating Hole 18 Filler

Claims (1)

[Claims] 1. A low temperature for concentrating and collecting odorous components by connecting a suction pump to an end of a concentrating tube in which a filler for adsorbing odorous components is connected and cooling the concentrating pipe from the surroundings while sucking by the suction pump. In the concentrated odor collecting device, the concentrating tube is formed in a straight tube shape, and both ends thereof can be opened and closed, and one or a plurality of concentrating tube accommodating holes capable of accommodating the straight tube concentrating tube and an inlet / outlet for a cooling medium. And a sealable refrigerant container for accumulating a cooling medium inside, and configured to insert the concentration tube into the concentration tube accommodation hole and transfer the odor collecting and concentration tube while continuing cooling. A low temperature concentrated odor collecting device characterized in that