Purpose of vacuum drying oven:
The vacuum drying oven is used for the drying and heating treatment of articles under vacuum conditions in factories and mines, universities, colleges, scientific research and various laboratories. Heating and drying items under vacuum conditions has the following advantages:
Can reduce the drying temperature (low pressure, low temperature).
Avoid heating and oxidation of some items, and no dust particles will be damaged.
Avoid heating the air to kill biological cells.
The composition and working principle of the vacuum drying oven:
Except for DZF-6500 vacuum drying oven and DZF-6210 vacuum drying oven, DZF series vacuum drying ovens are of vertical type, and the rest are of desktop structure. The vacuum box is composed of four parts: the box body, the inner tank, the vacuum system and the temperature control system.
The box body of the vacuum drying oven is made of high-quality stainless steel plate, and the surface is sprayed with plastic treatment, and the color is bright. The inner tank is made of general galvanized steel plate or stainless steel plate. The shape of the inner cavity is a square with a semicircular arc inner corner. The inner and outer boxes are filled with ultra-fine glass wool as heat insulation material; the middle of the box door adopts a double-layer glass structure, which is convenient for observing the dried items in the box; a thick tempered glass is installed on the inside of the box door, and a long cylindrical door is used at the same time This way, the distance between the door buckle and the tempered glass can be adjusted so that the rubber sealing ring can be pressed tightly after the door is closed to ensure that there is no air leakage when the vacuum is pumped. (Caution: The rubber sealing ring is not resistant to oil!) The vacuum pumping system consists of a vacuum pump, a vacuum gauge, a vacuum valve, and a vent valve. According to the needs of users, it can be equipped with a dry filter tank (or air inlet valve), etc. The temperature control system is composed of sensors, temperature controllers, heaters, etc., when the temperature controller receives the sensor output resistance signal (100Ω at 0°C , 0.3Ω/℃), the actual temperature is measured in the working room of the PV screen display. When the input signal is less than the set value, the power tube (triac) is turned on, so that the heater obtains sufficient electric power to generate heat. On the contrary, the power tube has no electric power output and the heater does not heat. The temperature controller has the characteristics of PID regulation output, adjustable electric power output, error correction of measuring temperature, timing control and other functions, as well as safety deviation alarm function with light and automatic cut-off over temperature.
Features of vacuum drying oven:
1. The heating time is shortened by more than 50% compared with the traditional vacuum drying oven.
2. The inside of the oven can withstand high vacuum pressure without any deformation.
3. Compared with the traditional vacuum drying oven, the energy consumption is reduced to 20%
4. The tightness of the cabinet door can be adjusted to ensure high vacuum in the cabinet.
5. The temperature setting and control of the intelligent digital display are both high precision.
6. The oven adopts jacketed vacuum glass door. The indoor temperature can be effectively maintained, and the material reaction can also be observed directly.
7. The product shell is sprayed with environmentally friendly metal paint, and the overall design is beautiful and generous.
