JP3711180B2 - Analyzer with cooling device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is related to a cooling device with spectrometer, particularly for measuring the prone multicomponent aqueous solution or the like of air bubbles at a high temperature.
[0002]
[Problems to be solved by the invention]
When sample liquid is introduced into the flow cell from the outside and analytical measurement is performed, the measured value may be greatly affected by the liquid temperature of the sample liquid depending on the measurement method. The effect is significant in the method.
[0003]
For example, in the case of hydrochloric acid-hydrogen peroxide aqueous solution, a large amount of bubbles are generated at high temperature, and it is difficult to completely remove bubbles even through a defoaming tank, and the opening / closing operation of a solenoid valve provided in the sampling line In some cases, fine bubbles may be generated by the shock of the above, and the measurement data is often affected by interference by these bubbles. Therefore, in order to perform more accurate measurement, it is desirable to lower the liquid temperature and to control the temperature.
[0004]
For this reason, conventionally, a liquid cooler has been adjusted by providing a large cooler or temperature controller as a processing means before introducing the sample into the analyzer. However, these devices are generally large and expensive and require a space for installation, and piping between the sample tank, the cooling device, and the analyzer is also required, and there are many causes of trouble such as liquid leakage. It was.
[0005]
The present invention has been made in view of such circumstances, and a low-cost analysis with a cooling device that can introduce a high-temperature sample as it is without going through a cooler or a temperature control device and can measure it stably and reliably. The purpose is to provide a total.
[0006]
[Means for Solving the Problems]
In the present invention, means for solving the above-described problems are configured as follows.
In other words, a cooling device in which an exhaust fan for ventilating the flow cell and the analyzer body is provided in the analyzer body case, and a sample solution is introduced into the flow cell from the outside of the analyzer body case to perform optical analysis measurement In the attached analyzer , a part of the introduction path of the sample liquid to the flow cell is formed in the heat exchanging portion, and the heat exchanging portion is arranged outside the analyzer main body case along the analyzer main body case and the exhaust fan. Is provided at a position to be cooled by air exhausted from the analyzer body case to the outside, and the heat exchange part is pre- cooled by an exhaust fan before the sample liquid is introduced into the analyzer body case It is characterized by that.
[0007]
In the analyzer with a cooling device of the present invention, an exhaust fan for ventilating the analyzer main body is provided in the analyzer main body case, and the heat exchange part formed in a part of the sample liquid introduction path is analyzed. The sample liquid is placed outside the analyzer main body case along the main body case and at a position cooled by air exhausted from the analyzer main body case by the exhaust fan. The sample liquid is introduced into the flow cell after being brought into a temperature state in which bubbles are unlikely to be generated in the stage before being introduced.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
First, FIG. 1 to FIG. 5 show an embodiment of an analyzer with a cooling device studied by the present inventors prior to the present invention, and these will be described in detail with reference to the drawings.
FIG. 1 is a configuration diagram of an analyzer with a cooling device that can stably measure a multi-component aqueous solution that easily generates bubbles at a high temperature. Reference numeral 1 is a sample tank for storing a sample liquid, Sampling line, 3 is a suction pump, 4 is an analyzer body case, 5 is an exhaust fan provided in the analyzer body case 4, and 22 is a heat exchange formed by spirally winding a part of the sampling line 2 , 6 is a defoaming tank, 7 is a solenoid valve, 8 is a flow cell, 9 is a detector , 10 is a reflux path for refluxing the sample liquid mixed with bubbles discharged from the defoaming tank 6 and the flow cell 8 to the sample tank 1. Oh Ru.
[0009]
In the analyzer with the cooling apparatus configured as described above, the high-temperature sample liquid sucked up from the sample tank 1 by the suction pump 3 is introduced into the analyzer main body case 4 from the sampling line 2. After being cooled by the exhaust fan 5, the air is introduced into the defoaming tank 6 and defoamed. In the defoaming tank 6, the bubbles in the sample liquid rise and are refluxed from the reflux path 10 to the sample tank 1, and the sample liquid without bubbles at the bottom passes through the sampling line 21 by opening and closing the electromagnetic valve 7. It is introduced into the flow cell 8 and measured.
[0010]
When the temperature of the sample liquid is high, a chemical reaction is likely to occur during liquid feeding, and foaming is likely to occur. Air bubbles may also be formed after passing through the defoaming tank 6, and the opening and closing operation of the electromagnetic valve 7 Although fine bubbles are likely to be generated even by a shock, in this embodiment, the exhaust fan 5 for ventilating the inside of the analyzer body case 4 is air-cooled at the stage of introducing the sample liquid to remove the bubble generation factor. Thus, a sample solution with very few bubbles can be introduced into the flow cell 8. Even in this case, there is a concern that a small amount of bubbles may be introduced into the flow cell 8, but in this regard, a certain waiting time is provided so as to escape to the upper part and start the subsequent measurement. I can deal with it.
[0011]
As described above, by using the exhaust fan 5 for the cooling of the sample solution, without adding a large improvement can it to cool the sample solution extremely less costly. Therefore, it is not necessary to install a large and expensive cooling device or temperature control device, space saving can be achieved, and a high-temperature sample solution can be directly introduced into the analyzer to obtain a highly reliable measurement value. It is possible to measure a sample solution in a wide temperature range from a low temperature to a high temperature. Further, because external piping for cooling the sample solution is unnecessary, the cause of troubles such as leakage fluid is reduced. Since cooling the specimen liquid itself Te introduced early stages odor of the sample liquid, loosening of the pipe due to temperature changes in the analyzer inside is reduced, also, the liquid leakage is also reduced.
[0012]
2 to 4 show an example of the configuration of the heat exchange unit 22 provided in the sampling line 2. FIG. 2 shows a configuration in which the tube is spirally wound so that the surface area can be set large, and FIG. FIG. 4 shows a combination of spiral tubes in parallel by a joint 221, and FIG. 4 shows a combination of three thin tubes in parallel by a joint 221. In addition, although illustration is abbreviate | omitted , what provided the radiation fin in the tube may be sufficient. As a material for the tube , PFA (fluororesin) or the like is suitable.
[0013]
FIG. 5 shows a configuration of the analyzer from which the defoaming tank 6 is removed. Depending on the use conditions, a sufficient bubble removing effect can be obtained even with such a configuration.
[0014]
Hereinafter, an embodiment of the analyzer with a cooling device of the present invention in which the heat exchanging portion 22 is arranged outside the analyzer body case 4 will be described with reference to FIG. In FIG. 6, as described in FIGS. 1 to 5, reference numeral 1 is a sample tank for storing a sample liquid, 2 is a sampling line, 3 is a suction pump, 4 is an analyzer body case, and 5 is an analysis thereof. An exhaust fan provided in the meter body case 4, 22 is a heat exchange part formed by spirally winding a part of the sampling line 2, 8 is a flow cell, 9 is a detector, and 10 is discharged from the flow cell 8. This is a reflux path for refluxing the sample liquid mixed with bubbles to the sample tank 1. In this embodiment, the heat exchanging portion 22 is disposed outside the analyzer main body case 4. That is, the heat exchanging portion 22 is provided outside the analyzer main body case 4 along the analyzer main body case 4, and is further cooled by the air exhausted from the analyzer main body case 4 to the outside by the exhaust fan 5. It is provided.
[0015]
【The invention's effect】
As described above, Oite the cooling device with analyzer of the present invention, a portion of the introduction path of the sample solution to the flow cell so as to form the heat exchange unit, the heat exchange unit, the analyzer body case It is provided outside the analyzer body case so as to be along the position cooled by air exhausted from the analyzer body case to the outside by the exhaust fan, and before the sample liquid is introduced into the analyzer body case Since the heat exchanging part is preliminarily cooled by the exhaust fan so that it is air cooled by the exhaust fan, it can be provided with a cooling function at low cost, and there is no need to provide an expensive cooling device or temperature control device outside. A high-temperature sample solution can be directly introduced into the analyzer to obtain a highly reliable measurement value. Furthermore, since no external piping is required, trouble factors such as liquid leakage are reduced. In addition, since the sample liquid is cooled in the initial stage of introduction , troubles such as loose pipes and liquid leakage due to temperature changes inside the analyzer are reduced.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of an analyzer with a cooling device studied by the present inventors prior to the present invention .
FIG. 2 is a drawing showing an example of a heat exchange unit used in the analyzer with a cooling device .
3 is a diagram showing another example of the heat exchanging portion.
4 is a diagram showing still another example of the heat exchanger.
FIG. 5 is a configuration diagram showing another embodiment of the analyzer with a cooling device examined by the present inventors prior to the present invention .
6 is a block diagram showing an embodiment of a cooling device with a spectrometer of the present invention.
[Explanation of symbols]
2 ... introduction path, 22 ... heat exchange part, 4 ... analyzer main body case , 5 ... exhaust fan, 8 ... flow cell.

Claims (1)

An analysis with a cooling device is installed in the analyzer body case to provide a flow cell and an exhaust fan to ventilate the analyzer body, and to introduce the sample solution into the flow cell from the outside of the analyzer body case for optical analysis measurement . In addition , a part of the introduction path of the sample liquid to the flow cell is formed in the heat exchange part, and the heat exchange part is analyzed outside the analyzer body case along the analyzer body case and by the exhaust fan. Provided at a position to be cooled by air exhausted from the inside of the meter body case, and configured so that the heat exchanging part is cooled by an exhaust fan in advance before the sample liquid is introduced into the analyzer body case An analyzer with a cooling device.

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