What are the parameters of medical cryogenic vacuum drying cabinet?

Parameter I: Vacuum degree

According to the principal analysis, the key to drying is the vacuum degree. At room temperature, purified water is usually retained at about 20 degrees Celsius on the surface of instruments that have been cleaned with purified water.

Without heating, when the air pressure reaches -96 kPa, the water can begin to boil and volatilize. Therefore, the main parameter of medical low-temperature vacuum drying cabinet is the vacuum degree of the working chamber. The higher the vacuum degree, the better the drying effect, so the pursuit of higher vacuum degree is the main index to evaluate the effect of drying cabinet.

Parameter two: temperature

In the process of liquid volatilization, part of the heat of the non-volatile liquid will be taken away, so the temperature of the remaining liquid needs to be compensated.

At the same time, raising the temperature of the liquid can reduce the vacuum degree when the liquid evaporates, thus promoting evaporation. Due to the delayed nature of heat absorption by the liquid, even after the heated temperature is transferred to the liquid on the surface of the apparatus, it may become uneven.

Temperature compensation is therefore particularly important compared to vacuum, although the requirements for temperature accuracy are not particularly demanding. The second key parameter of the drying cabinet is therefore the temperature of the liquid on the surface of the instrument.

Parameter 3: Oil-free

Ordinary drying cabinets usually use an oiled vacuum pump in order to achieve the required vacuum level. However, oiled vacuum pumps are prone to oil return, which may damage medical instruments.

Even if a better filter is used, 100% filtration effect cannot be guaranteed, not to mention that the performance of the filter is bound to decline after working for some time, further affecting the filtration effect.