Vacuum drying ovenIt is specially designed for drying heat-sensitive, easy to decompose and easy to oxidize substances. When working, it can maintain a certain degree of vacuum in the working room, and can fill inert gas into the inside, especially for some complex items. It can also be quickly dried. Intelligent digital temperature regulator is used for temperature setting, display and control.

The reason for the difference between the meter reading of the vacuum drying oven and the reading of the glass rod thermometer in the vacuum chamber.

The general electrothermal vacuum drying oven adopts the method of heating the wall surface of the vacuum chamber first, and then radiating heating from the wall to the workpiece. In this manner, the temperature sensor of the temperature control instrument can be arranged on the outer wall of the vacuum chamber. The sensor can receive convective, conductive, and radiant heat simultaneously. However, the glass rod thermometer in the vacuum chamber can only accept radiant heat, and because the blackness of the glass rod cannot be reached, a considerable part of the radiant heat is refracted, so the temperature value reflected by the glass rod thermometer is definitely lower than the temperature reading of the instrument.

The reason why the vacuum drying oven is vacuumed first and then heated.

1. If the first heating and then vacuum pumping program operation, the heated air is pumped out by the vacuum pump, the heat will inevitably be brought to the vacuum pump, resulting in the vacuum pump temperature rise is too high, it is possible to reduce the efficiency of the vacuum pump.

2. The heated gas is directed to the vacuum pressure gauge, which produces a temperature rise. If the temperature rise exceeds the specified temperature range of the vacuum pressure gauge, it may cause the vacuum pressure gauge to produce an indication error.

3.The workpiece is placed in the vacuum box to vacuum in order to remove the gas components that can be removed from the workpiece material. If the workpiece is heated first, the gas will expand when it is heated. Since the vacuum box is very well sealed, the huge pressure generated by the expanding gas may crack the tempered glass of the observation window.open,This is a potential danger.

Reasons for the absence of temperature uniformity parameters in vacuum drying ovens

Vacuum drying oven relies on the movement of gas molecules to make the working room temperature uniform almostNo inch inIt's,byoften.Definition of Temperature Uniformity of GaugeCan't beUsed in vacuum drying oven. The same onetemperature uniformity parameter meter,FromHeated wallThe distance is different, the amount of heat radiation is also different.Due to the vacuum drying oven in the structure is difficult to make the studio three-dimensional space within the point of uniform radiation heat, but also the lack of authoritative evaluation methods, this.AlsoIt may be the reason why the temperature uniformity parameter is not set in the standard of electrothermal vacuum drying oven.