Uses: Drying box for dry goods or dry heat sterilization. The constant temperature adjustment range, (50 ~ 200) °C (or (50 ~ 250) °C, (50 ~ 300) 0C); incubator for the cultivation of bacteria. The constant temperature adjustment range: from above room temperature to 60 °C; water thermostat for indirect constant temperature heating. Its thermostatic adjustment range; from above room temperature to 65 °C. The above three types of boxes are heated by electricity, and sometimes they are collectively referred to as electric heating boxes. Enclosure 2. Mesh shelf 3. Side door 4. Temperature controller adjustment knob 5. Power socket 6. Indicator light 7. Blower switch 8. Change switch 9. Thermometer 10. Adjustable exhaust window 11. Glass door 12 .Insulation Door 13.Cover Rod Temperature Controller 14.Inner Iron Plate 15.Blower 16.Wire Hole 17.Insulation Material (Fiberglass or Asbestos Board) 18.Exhaust Vent 19.Temperature Chamber 20.Electrical Wire 21. Vent Industrial Gearbox,Parallel Shaft Gearbox,Post Hole Digger Gearbox,Direction Changing Gearbox RV Series Worm Reducer,WR Series Helical Gear Reducer Co., Ltd. , http://www.nbreducer.com
Classification: Drying box can be divided into ordinary style and blast type two. The latter is equipped with an electric fan inside the box to speed up the convection of hot air and make the temperature inside the box uniform. At the same time, water vapor that evaporates the contents of the box is accelerated into the air outside the box to improve the drying efficiency.
First, the structure of the drying oven
Drying oven is also called oven or oven. Mainly by the box, electric heater and temperature control system composed of three parts, the structure of the old dry box shown in Figure 12-1-1. In recent years, the drying ovens have been added with temperature indicators and temperature setters. 
(a) the box
1. Shell: The shell is made of thin iron plate (or thin steel plate). The wall of the box is divided into three layers (including the shell). Two sandwich layers are formed between the three layers of the iron plate. The outer layer is filled with heat-insulating material (glass fiber or asbestos board) and the inner layer is used as the hot air convection layer.
2. Constant temperature room: The space surrounded by the innermost iron plate is called a constant temperature room. There are 2 to 3 mesh shelves in the room for items. The temperature-sensing part of the temperature controller (ie, the temperature probe) extends from the left side wall into the constant temperature chamber. The bottom sandwich is equipped with heating wire.
3. Doors: Usually double. The inner door is a glass door that is used to observe the baked goods while reducing heat loss. External doors are used for thermal insulation.
4. Inlet and outlet holes: There is an air inlet on the bottom or side, and the dry air enters. There is a vent hole at the top of the box, and an adjustable exhaust window is installed at the outlet of the box, so the steam escapes. A thermometer is inserted in the center of the exhaust window to indicate the temperature in the tank.
5, side room: the control room. It is generally located on the left side of the box and is insulated from the thermostatic chamber. It is equipped with switches, indicators, temperature controllers, blowers and other electrical components. Open the side door, you can easily repair the circuit outside the heating wire.
There are also electric heating boxes that place the control room below the cabinet.
(B) Electric heater
Dryer electric heaters usually consist of four parallel heating wires. The heating wire is evenly coiled around the insulating board fired from the refractory material. Generally divided into two groups, controlled by the switch. The total power is (2 ~ 4) kW, power up to 8kW. The greater the power, the larger the cabinet.
(III) Temperature Control System
The temperature control system used in the early drying ovens was usually of two types, a differential rod type and a mercury thermometer type. The temperature control system used on the drying box produced in recent years is mainly composed of a temperature sensor, a temperature control circuit, a relay, a temperature setting, and a temperature display part.
Composition of dry box
Dry box assembly structure