Quick changeable temperature small-sized constant temperature sample pool

Abstract

The invention relates to a quick variable temperature miniature thermostatic sample cell, which is made of metallic material, an opening is formed in the center of the metallic material and is used as a sample cavity, a light through hole is formed on a metallic shell along the center of the sample cavity, a transparent material is embedded in the light through hole, a Peltier temperature control element is glued on the non-light surface of the metallic material, a groove is arranged on the bottom of the metallic shell for laying aside a temperature sensor, the coat of the metal shell has a heat insulation outer frame, the center of a base connected with the bottom of the heat insulation outer frame is provided with a miniature motor, a small magnet is arranged at the edge of the leaf of a spiral leaf on the shaft of the motor, a stirring magneton is laid aside at the bottom in the sample cavity, the inner wall of the sample cavity and the outer faces of the sensor and the stirring magneton is carried on chemical inertia processing. The invention replaces the water heat conduction with the metal, and changes the system temperature with a thermo-element; the sensor directly observes the temperature of the sample, the heat conduction is speeded up by a miniature electromagnetic stirring system has accelerated; the invention is characterized in having small volume, accurate the temperature measurement, quick variable temperature, and good stability, etc, being able to be placed in analytical instrument such as spectrophotometer, etc., and realizing the quick variable temperature and the accurate thermostatic control of the temperature of the sample.

Description

technical field [0001] The invention relates to a fast temperature-changing small constant temperature sample cell, which is a device capable of accurately and quickly reaching and stabilizing a liquid sample at a set temperature within a certain temperature range. It belongs to the technical field of analytical instruments and equipment. Background technique [0002] In the prior art, the general sample solution constant temperature device is a water (or oil) bath device independent of the main part of the instrument, generally including a constant temperature water bath box, a water pump and the like. Its working process includes two steps: 1. The water bath solution is heated or refrigerated for a period of time in the constant temperature water bath box. After reaching a sufficient thermal equilibrium state, the water bath solution is injected into the sample pool or around the cuvette, usually around the sample pool. Make a sealed tank so that the bath solution can flo...

AI Technical Summary

Problems solved by technology

And in order to make the sample solution and water carry out sufficient heat exchange, need to wait for a long time

Therefore, if an accurate temperature is to be obtained, most of the time in the experiment will be wasted waiting for sufficient heat exchange

Therefore, this design can only be used when the temperature change requires slow speed. If it is required to measure sample solutions at different temperatures in a short time, this design cannot meet the requirements.

[0005] Thirdly, the traditional design needs to configure accessories such as a constant temperature water bath and a water pump outside the main test system. The system has a complex structure, takes up a large volume, and has many connecting parts during use. It is not suitable for the requirements of on-site measurement by analytical instruments.

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