JPS6353844B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an evaporator that automatically supplies a sample liquid and continues evaporation.The present invention relates to an evaporator that automatically supplies a sample liquid and continues evaporation. The sensor detects a decrease in the sample liquid in the sample flask and operates the solenoid valve to supply the sample liquid from the sample container to the sample flask through the introduction pipe. When the sample liquid reaches a predetermined amount, the sensor This feature is characterized in that the injection of the sample liquid is stopped upon detection of this.

An example of implementing the present invention will be described below with reference to the drawings.

First, to give an overview of the evaporator, a sample flask 1 is connected to a cooler 3 equipped with a rotating device 2, and while rotating the sample flask, a warm water bath 4 is heated.
The distillate heated with hot water and condensed in the cooler 3 is received in a receiving flask 6 connected to the distillate extraction pipe 5 of the cooler. The cooler 3 is supported by a support column 8 erected on a support stand 7, and the hot water bath 4 is supported by a control unit 9.
Place it on top. The support column 8 is electrically raised and lowered by a motor, and it is convenient to lift the sample flask 1 from the hot water bath 4 by raising and lowering it under microcomputer control.

Next, to describe the components of the present invention, a sample liquid S is supplied into the sample flask 1 from a stopper 11 that fits into the mouth 10 of the cooler 3 and passes through the cooler. Insert the sample introduction tube 12 and the sensor 13 that reaches the sample liquid level. Therefore, the above-mentioned plug 11 is provided with a sensor insertion tube 14 along with a sample introduction tube 12 following its inner end, and the upper end of the sample introduction tube 12 passes through the inside of the plug 11 and has an opening 12 on its circumference.
The upper part 14a of the sensor insertion tube 14 penetrates the inside of the plug 11 and opens at the upper end of the plug 11, and the sensor insertion tube 14 is inserted into the sensor 1.
3, and connect it to the control section 9. A branch pipe 17 having an opening 16 that matches the opening 12a is provided at the cooler opening 10, and the stopper 11
A conduit 18 is connected to the branch pipe 17 and guided to the sample liquid container 20 via a solenoid valve 19.

The tip 12b of the sample introduction tube 12 and the tip 14b of the sensor insertion tube 14 are separated, and the sample introduction tube tip 12b is bent toward the sample liquid surface.
At the tip of the sensor insertion tube 14 is a support part 1 for the sensor 13.
3' protrudes to support the sensor 13 so as to be submerged below the surface of the sample liquid. It is preferable that this sensor support part 13' has flexibility so that it can be bent and stretched as desired.

With the above configuration, a predetermined amount of sample liquid S is injected into the sample flask 1, the sensor 13 is immersed under the liquid level, and the sample flask 1 is immersed in warm water of the hot water bath 4 to be heated, and the evaporated gas is is cooled by a cooler 3, and the condensed distillate is received into a receiving flask 6. Then, the sample liquid in the sample flask 1 decreases and the sensor 13
When the liquid surface leaves the liquid surface, the solenoid valve 19 is actuated via the control unit 9 by the action of the sensor 12 due to the temperature difference between the upper part of the liquid surface and the inside of the liquid. A fixed amount of the sample liquid is supplied into the sample flask 1, the sensor 13 is submerged below the surface of the sample liquid, and evaporation continues as before.

As described above, the present invention detects a drop in the liquid level of a sample solution using a sensor inserted into a sample flask, operates a solenoid valve, and automatically injects a predetermined amount of sample solution through a sample liquid introduction tube inserted into the sample flask. Not only can distillation be continued while maintaining a constant liquid level by additionally supplying the liquid, but in the case of discontinuous operation, the sensor can also be used to signal the end of distillation.
The practical benefits are enormous. Moreover, it has a simple structure and can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of the implementation of the present invention, Fig. 2 is a cutaway front view showing the upper end of the condenser, Fig. 3 is a sectional view of Fig. 2, and Fig. 4 is a sample flask. It is a cutaway front view showing the inside. 1 is a sample flask, 3 is a cooler, 4 is a hot water tank,
9 is a control part, 10 is a cooler mouth part, 11 is a plug, 12
13 is a sensor, 14 is a sensor insertion tube, 15 is a sensor lead wire, 16 is an opening, 17 is a branch tube, 18 is a sample liquid conduit, 19 is a solenoid valve, 20
is the sample liquid container.

Claims (1)

[Claims] 1. Insert an inlet tube for sample supply and a sensor in contact with the sample liquid into the sample flask in which the sample liquid is placed and evaporated, and when the sensor detects a decrease in the sample liquid in the sample flask, the electromagnetic valve is activated and the sample container is removed. The sample liquid is supplied to the sample flask through the above-mentioned introduction tube,
An evaporator characterized in that a sensor detects when the sample liquid reaches a predetermined amount and stops injection of the sample liquid.