DE10211503A1 - Heat distribution unit, consists of a block made of heat conducting material, with a trough type cut-out which holds the vessel body. - Google Patents

Abstract

An arrangement for distributing heat from a heater element, e.g. a hot plate (2), to a chemical and/or physical reaction vessel (3), consists of a block (4) made of a heat conducting material. The block has a trough type cut out (5) which holds the vessel body, and a lower section which sits on a heating unit (2).

Description

The invention relates to a device according to the preamble of claim 1.

Pistons made of glass serving as physical and / or chemical reaction vessels are known and widely used u. a. used in laboratories. Especially when Heating such pistons or the contents of the pistons is the problem that Thermal energy distributed as evenly as possible over the largest possible area of the Apply piston body. To achieve this, it is common practice to use the pistons to heat in an oil bath, but this is a considerable effort and can also lead to dangerous situations, especially if a heated one The piston bursts, a liquid in the piston gets into the hot oil bath and this leads to physical or chemical reactions, for example to abrupt evaporation of water in the heated above the boiling point of water Oil bath.

Pistons with a spherical piston body and are also known in particular a molded piston neck forming the piston opening.

The object of the invention is to show a device with the essential Simplified and even heating of a piston is possible without risk is. To solve this problem is a device according to the claim 1 trained.

The device according to the invention avoids cumbersome and complex as well also dangerous baths, especially oil baths for heating pistons. Developments of the invention are the subject of the dependent claims.

The invention is described below with reference to the figure, which is a simplified representation and shows partly in section a heating device according to the invention.  

The auxiliary device, generally designated 1 in the figure, serves to evenly distribute the heat of a heating plate 2 to a piston 3 designed as a chemical or physical reaction vessel. The latter is made of glass in a manner known per se and consists of the essentially spherical piston body 3 'with the molded neck 3 "forming the opening of the reaction vessel or piston.

The device 1 is essentially formed by a block 4 made of a heat-conducting material, for example aluminum, which has a trough-like depression or recess 5 on its upper side, the shape of which is adapted to the outer surface of the piston body 3 ', ie part-spherical or is designed in the shape of a spherical cap, in such a way that the piston body 3 'can be inserted into this recess 5 in a suitable manner. With the underside of the block 4 stands on the heating plate 2 , so that the heat energy given off by the heating plate 2 is evenly transferred to the piston body 3 inserted into the recess 5 .

If the heating plate 2 is designed in a manner known per se as a magnetic stirrer for a magnetic stirring element 6 arranged in the interior of the piston 3 , the block 4 preferably has bores 7 on its underside which reduce eddy current losses when the magnetic stirrer is switched on. Instead of the bores 7 , grooves can also be provided in the lower region of the block 4 , in such a way that an eddy current flow is largely avoided through these grooves or other recesses.

With 8 a bore in block 4 is designated, in the z. B. a temperature measuring element 9 can be used, specifically for measuring the temperature and / or for temperature-dependent control of the preferably electric heating plate 2 .

The invention has been described above using an exemplary embodiment. It goes without saying that numerous modifications and additions are possible without thereby departing from the inventive idea on which the invention is based. Other heat-conducting materials are also suitable for the block 4 , for example also those that are not electrically conductive, such as, for. B. ceramics, for example aluminum nitride or aluminum oxide ceramics, but also other metals.

There is also the possibility of filling the gap between the surface of the recess 5 and the outer surface of the piston body 3 'with a heat-conducting paste.

LIST OF REFERENCE NUMBERS

1

Heat transfer device

2

heating plate

3

piston

3

'' Piston body

3

"Piston neck

4

block

5

recess

6

Mixing or stirring stick

7

drilling

8th

drilling

9

temperature sensor

Claims (7)

1. Device for distributing the supply of heat to a heating element, preferably a heating plate ( 2 ), to a piston ( 3 ) forming a chemical and / or physical reaction vessel, characterized by a block ( 4 ) made of a heat-conducting material having a top surface trough-like recess ( 5 ) for the adapted reception of a piston body ( 3 ') of the piston ( 3 ) and on a lower side forms a standing surface for installation on the heating device ( 2 ). 2. Device according to claim 1, characterized in that the block ( 4 ) consists of metal, preferably of aluminum. 3. Apparatus according to claim 1, characterized in that the block from one non-metallic material, for example ceramic. 4. The device according to claim 2, characterized in that the block in the region between the underside and the trough ( 5 ) is provided with a plurality of recesses or interruptions, for example with a plurality of bores ( 7 ). 5. Device according to one of the preceding claims, characterized in that the trough-shaped recess or recess ( 5 ) is designed like a spherical cap. 6. Device according to one of the preceding claims, characterized by at least one opening for inserting a temperature sensor ( 9 ) on the block. 7. Device according to one of the preceding claims, characterized in that at least one temperature sensor ( 9 ) is provided on the block.