Muffle furnace

Abstract

The invention relates to the technical field of muffle furnaces, and discloses a muffle furnace. The muffle furnace comprises a lower heat insulating cover, an upper heat insulating cover and a crucible bracket, wherein a first heating trough is formed in the lower heat insulating cover, and resistance wires are arranged at the bottom of the first heating trough; the upper heat insulating cover isrotatably connected to the upper part of the lower heat insulating cover and is matched with the lower heat insulating cover for use, the upper heat insulating cover is provided with a second heatingtrough, and the second heating trough is matched with the first heating trough to form a heating cavity; and the crucible bracket is rotatably mounted on the lower heat insulating cover, the cruciblebracket is located in the heating cavity and is provided with a plurality of through holes for communicating the first heating trough with the second heating trough. According to the muffle furnace,the resistance wires are arranged at the bottom of the first heating trough, when an object to be heated is heated, a crucible containing the object to be heated is placed on the crucible bracket or the object to be heated is directly placed on the crucible bracket, and the heating speed is high. The muffle furnace is small in size and easy to carry, the upper opening design overcomes the technical prejudice in the prior art, the temperature in the muffle furnace can be reduced more quickly, the operation is more convenient, the crucible bracket is rotatable, so that the operation is safer.

Description

technical field [0001] The invention relates to the technical field of muffle furnaces, in particular to a muffle furnace. Background technique [0002] The muffle furnace is a kind of heating equipment used to heat the workpiece. It is widely used for its precise temperature control, easy operation and fast heating speed. When analyzing the content of heavy metals in a certain substance, muffle furnaces are often used, but the muffle furnaces on the market have a large heating chamber and a relatively slow heating speed, and after the substance is heated, the heat dissipation speed is slow, so take it out When the substance is heated, it is easy to burn the operator, and there is a certain potential safety hazard. [0003] Taking the rapid pretreatment of samples as an example, it takes about 40 minutes to one hour for the internal temperature of the muffle furnace to rise to 600°C, and it takes about four hours for the internal temperature of the muffle furnace to cool do...

AI Technical Summary

Problems solved by technology

[0004] Based on the above, the object of the present invention is to provide a muffle furnace, which solves the problems of the existing muffle furnace with large volume, long heating time, slow cooling speed and potential safety hazards due to slow heat dissipation.

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