The blast drying box is mainly distinguished from the structure of the box and the level of temperature control. According to the structure of the box, we can divide the air drying box into desktop air drying box and vertical air drying box; According to the temperature, we can divide the blast drying oven into electric heating constant temperature blast drying oven and high temperature blast drying oven. As the most common drying equipment, air-blast drying oven is widely used for drying, baking, wax melting, sterilization and solidification in laboratories of industrial and mining enterprises, medicine and health, and scientific research units.

the distinction between desktop and vertical air-blast drying oven

the vertical air-blast drying oven adopts cuboid floor-standing structure, which is usually placed directly on the laboratory floor. The test instrument is usually on the top of the drying box, which is convenient for operation. The vertical air-blast drying box adopts the fan imported from the United States, and the vertical and vertical forced convection makes the temperature in the studio uniform, which can meet the national standard (2%). Because the air duct structure is special, the fan is at the bottom of the box, and natural air convection. The vertical air-blast drying oven has large power and structure, and is suitable for drying various products or materials and electrical appliances, instruments, meters, components, electronics, electricians, automobiles, aviation, communications, plastics, machinery, chemicals, foods, chemicals and hardware tools under constant temperature environment conditions and various constant temperature adaptability tests.

The desktop air-blast drying oven adopts a horizontal box structure, and the instrument is on the right side of the box, so the box is small and convenient for test movement. In industrial and mining enterprises, universities, biopharmaceuticals, food processing, scientific research, medical units and various laboratories, it is used for drying, baking, melting wax, disinfection and sterilization of non-flammable and explosive and non-volatile articles. The hot air circulation system used in the desk-top blower drying oven consists of a fan and a special air duct which can run continuously at high temperature. The temperature in the working room is uniform, and it is widely used for drying glassware, thermal denaturation, thermal hardening, thermal softening and moisture removal of experimental samples, foods and chemicals, dry heat sterilization of utensils and appliances in bioengineering, and drying and aging of electronic components.

the difference between the electrothermal constant temperature air blast drying oven and the high temperature air blast drying oven

The high temperature air blast drying oven adopts imported high-power fans and a double-air-duct thermal circulation system, which circulates the stainless steel high temperature electric heater through the wind to quickly heat the studio. The studio adopts mirror stainless steel and ultra-thermal insulation high-quality cotton, which can make the temperature of the box up to 6℃. It is widely used for high-temperature drying of special materials, heating and installation of workpieces, high-temperature testing of materials, reaction treatment of chemical raw materials, ultra-high-temperature oven, higher working temperature, high-temperature drying of special materials, heating and heat treatment of workpieces, high-temperature testing of materials, etc.

the electrothermal constant-temperature blast drying oven adopts air conditioning, forced internal circulation ventilation and balanced temperature adjustment. The back of the box is provided with an air inlet and an air outlet to balance the air pressure in the box. The drying oven adopts PT1 platinum resistance temperature sensor, and the digital temperature regulator is sensitive to temperature control, easy to operate, reliable in performance, and the working temperature is directly displayed by numbers, which is intuitive and easy to read. Drying box is widely used for baking, melting, drying or other heating of samples. The highest working temperature is 3℃, and the temperature accuracy can reach .1℃. The electrothermal constant-temperature blast drying oven is suitable for measuring moisture in coal, drying articles, drying heat treatment and other heating purposes.

1, box 2, control panel 3, box door 4, observation window 5, shelf 6, door handle

7, power switch 8, temperature controller 9, nameplate 1, box foot

i. Usage

1. Put the articles to be dried into the drying box and close the box door.

2. turn the power switch to the "1" position, at which time the power switch is on and the display screen has digital display.

3. set the required working temperature and working time according to the operating instructions of the temperature controller (the working time may not be set).

4. The equipment will automatically run under the required working conditions, turn off the power switch after use, and take out the articles.

※ If the operating temperature is too high (generally higher than 7℃), you must wait until the equipment cools down before taking out the articles

II. Instructions for the use of the temperature controller

1. Temperature SETting

A. Under normal working conditions, press the set key to enter the temperature setting state, at which time the PV display screen shows SP and SV display screen flashes first;

b, press the shift key to shift the flicker to the required setting position;

C. press the minus key or the plus key to adjust the number to the required value;

D. press the SET key twice, the instrument will return to the normal working state, the temperature setting is completed, and the instrument will run according to the new set value.

2. Timing function

A. Under normal working conditions, press the SET key twice to enter the timing setting state, at which time the PV display screen displays ST, and the SV display screen displays and flashes;

b, press the shift key to shift the flicker to the required setting position;

C. press the minus key or the plus key to adjust the number to the required value;

D. press the SET key once, and the instrument will enter into a timed operation state, at which time the operation indicator light flashes;

e. The timing function is countdown operation. In the timing operation state, press the shift key once, and the SV display screen will display the timing remaining time;

F. When the remaining time of timing returns to zero, the instrument enters the timing End state. At this time, the SV display screen displays END and flashes, and all indicators except the wind speed indicator are turned off;

g. when the timer ends, press the SET key to restore the instrument to its normal working state.

H. when the timer ends, the measured value displayed on the PV display screen will drop to the ambient temperature because the temperature control part of the instrument stops working, which is a normal phenomenon.

I. if you don't need to use the timing function, be sure to set the timing time to zero.

J. during the operation of the timing function, if there is an unexpected power failure, the remaining time of the timing will be automatically reset to zero after being powered on again.

K. the timing range of this equipment: 1 ~ 9999 minutes or 1 ~ 9999 hours.

III. troubleshooting: as it is, there is no power outlet, no power outlet, no plug, no disconnection, no plug, no fuse, no open circuit, no fuse, no power switch, no temperature rise in the power switch box, low set temperature adjustment, bad set temperature electric heater, bad temperature controller, bad connection wire of temperature sensor. Loosening and tightening the nut of the sensor connecting wire has a large error between the set temperature and the temperature in the box

. The temperature sensor is broken, the temperature sensor is out of control, the temperature sensor is fixed and falls off, and the temperature controller is broken, and the thyristor is broken.