RU149825U1 - MICRO-EVAPORATOR - Google Patents

Abstract

1. A microevaporator containing a base on which a tablet, a lower and upper case and a guide plate are fixed, characterized in that the tablet is made in the form of a plate with holes for installing test tubes with liquids, a lower case is attached to the tablet, on one side of which there is an input flange, a guide plate with tubes is fixed in the lower case, the upper case is located on the lower case, on one side of which there is an exhaust flange. 2. The micro evaporator according to claim 1, characterized in that a solid-state thermostat is used as the base. 3. A micro-evaporator according to claim 1, characterized in that an adapter plate is connected to the inlet flange for connecting working gas preparation devices to the micro-evaporator. 4. The microevaporator according to claim 1, characterized in that the tablet is completely or partially filled with tubes with liquid.

Description

The utility model relates to evaporators and can be used when working with liquid samples in medicine, agriculture, forensic medical examination, sanitary-epidemiological service, analytical chemistry, microbiology, virology, biochemistry and similar fields of science and technology.

From the prior art, an analogue of a micro evaporator is known - Sample concentrator (No. FSC400D in the Techne catalog on www.techne.com). The design of the Sample concentrator consists of a gas chamber with a nozzle for supplying gas, in which the needles are fixed. The gas chamber is fixed to the carriage with a latch that can move along the vertical guide, thereby changing the height of the needles. The screw guide is fixed to the base on which the solid-state well thermostatic device is located, in which containers with evaporated liquid are placed.

The disadvantages of the considered device are the need to use a compressed gas cylinder as a source of working fluid, and the risk of cross-contamination (contamination) of evaporated samples.

From the prior art there is known an analog of a microevaporator - Vortex evaporator (patent US 5569357). Vortex evaporator consists of a chamber, housing, control panel, heater cover, gas supply system and a drive mechanism designed to provide rotation. At least one container with vaporized liquid is placed in the chamber. Inert gas or vacuum can be used to increase the evaporation rate in the Vortex evaporator.

The disadvantages of the concentrator considered are the low evaporation rate, the risk of cross-contamination of liquid samples, the difficulty of mobile use, the difficulty of heating the evaporated sample.

From the prior art, the closest analogue micro-evaporator is known - Evaporator with hot air bath (patent US 6357141). Evaporator with hot air bath consists of a drying chamber with many channels for directing the working gas, a base, adjustable in height with a hole block mounted on it, and a heater. In the well block place containers with liquid. To increase the evaporation rate in the Evaporator with hot air bath, a heated inert gas can be used along a spiral path and heating the evaporated sample.

The disadvantages of the considered device are the need to ensure high gas pressure at the inlet to the drying chamber, the need to use a can of compressed gas as a source of working fluid, and a high risk of cross-contamination of evaporated samples.

The tasks to which the claimed utility model is directed are: increasing the rate of evaporation of liquids; providing protection against cross contamination of simultaneously evaporated samples; the possibility of using atmospheric air, air that has been pretreated (dried, dedusted, deoxygenated, etc.), inert gas as a working gas; the possibility of evaporation from samples of caustic liquids (volatile mineral and organic acids, ammonia) and various organic solvents.

The technical result of the utility model is: reducing the mass and dimensions of the microevaporator, preventing leakage of vapors from one sample to another (contamination) for simultaneously evaporated samples, increasing the rate of evaporation of liquids.

To solve problems and achieve a technical result, a micro-evaporator is proposed, consisting of a base, a tablet, a lower and upper case and a guide plate, with tubes fixed in it. On the base is fixed a tablet made in the form of a plate with holes for installing test tubes with liquid samples. The bottom case is attached to the tablet, on one side of which is the inlet flange. A guide plate with tubes is fixed in the lower case, which ensures the optimal direction of movement of the working gas in the micro-evaporator, which prevents the vapor from seeping from one sample to another (contamination) for simultaneously evaporated samples and increases the rate of evaporation of liquids. On the lower case, the upper case is fixed, on one side of which there is an exhaust flange. A solid state thermostat can be used as a base. It is possible to connect an adapter plate to the inlet flange for further connection of working gas preparation devices (filters, dehumidifiers, etc.) with a microevaporator. It is possible to fill the tablet or solid state thermostat with test tubes with evaporated samples in whole or in part. Evaporation from tubes of caustic liquids (volatile mineral and organic acids, ammonia) and various organic solvents is possible.

In FIG. 1 shows a general view of a microevaporator.

In FIG. 2 shows the design of the micro-evaporator.

In FIG. 3 presents the principle of operation of the microevaporator.

The microevaporator (see Fig. 1) consists of a base 1, a tablet 2, a lower case 3, in which a guide plate 4 is fixed with holes in which the tubes 5 and the upper case 6 are fixed. The tablet 2 is made in the form of a plate with holes for installing tubes . On one side of the lower case 3 is the inlet flange. On one side of the upper housing 6 is an exhaust flange. It is possible to use solid-state thermostat as base 1. It is possible to connect the adapter plate 7 to the inlet flange (see Fig. 2) for further connection of working gas preparation devices (filters, dehumidifiers, etc.) to the microevaporator.

The principle of operation of the microevaporator is illustrated in Fig.3. In the initial state, tubes 8 with liquid samples are installed in the openings of the tablet 2 fixed on the base 1. The lower case 3 is put on the tablet 2 with the guide plate 4 fixed in it with the tubes 5 and the upper case 6 attached to it. The gas flow 10 coming through the inlet flange flows through the annular gaps between the tubes 5 and tubes 8 perpendicular to the free surface of the evaporated samples. Flowing along tubes 8, the gas stream 10 is rotated 180 degrees, capturing a stream of 11 vapor of liquids from the tubes 8. The vapor-gas mixture 12 passes through the tubes 5 through the tubes 5 and is removed from the microevaporator through the exhaust flange.

In the proposed microevaporator it is possible to obtain high evaporation rates by removing the vapors from the tubes by the gas stream, reducing the distance between the gas stream and the free surface of the liquid and reducing the partial pressure of the liquid vapor. The design of the device is small and does not require connection to additional communications except an electric power source, which makes it autonomous and allows use in the field. The design of the device and the presence of the adapter plate allows the use of atmospheric air or pre-treated air as a working gas. The use of a solid state thermostat prevents the cooling of liquids during the evaporation process, which increases the rate of evaporation. The highly resistant material (polypropylene) from which the device is made allows the evaporation of caustic liquids (volatile mineral and organic acids, ammonia) and various organic solvents from test tubes.

Claims (4)

1. A microevaporator containing a base on which the tablet is fixed, the lower and upper cases and a guide plate, characterized in that the tablet is made in the form of a plate with holes for installing tubes with liquids, a lower case is attached to the tablet, on one side of which there is an input a flange, a guide plate with tubes is fixed in the lower case, the upper case is located on the lower case, on one side of which there is an exhaust flange. 2. The micro evaporator according to claim 1, characterized in that a solid-state thermostat is used as the base. 3. The microevaporator according to claim 1, characterized in that an adapter plate is connected to the inlet flange for connecting working gas preparation devices to the microevaporator. 4. The microevaporator according to claim 1, characterized in that the tablet is filled with tubes with liquid in whole or in part.

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