DMH-B3 high level double doors drying oven
Product name	high level double doors drying oven
Model specifications	DMH-B3
Supply scope	Complete machine
Main technical parameters
Outside Dimensions: 1700×1280×2150mm
Inside dimensions: 1000×1000×1200mm
Heating power: 18kw/380V
Air blast power: 2.2kw+0.12/380V
Cooling fan power: 0.37kw/380V
Moisture removal fan power: 0.25kw/380V
Inside temperature difference:±3℃
Wind circulation flow:  3450m3/h
Operating temperature:180℃
Purified air flow:160 m3/h
Application
This machine is suitable for desiccation and sterilization of the penicillin bottle, ampoule bottle,aluminium cap, solid material, and suitable for the sterilization of the glassware and metal ware pieces.
Working Principle
Put the materials into the workroom of the oven, close the door and make it airproof. Start intelligent temperature controller system. The circulation fan works and heating system opens that the temperature in the oven rise quickly. Under the function of the hot air centrifugal fan, dry hot air enter into the workroom through the effective filter passage convection wall. Under the function of the microporous adjusting convection wall, form a uniform distributing hot air layer. Hot dry air absorb the moisture of the materials' surface and transfer to the hot humid air. The hot humid air go into the heating passage from the other side of the air flue in the cabinet to evaporate and exhaust automatically from the humidity-discharging device. The dry hot air circulate directionally under the function of the air blower. The vapour exhaust automatically from the humidity-discharging device.
Along with the extension of the soak time, the moisture of the materials decreased gradually(At the same time. the fresh filtered air supplement after from the clearance inlets. It is slightly negative pressure state in the cabinet.). After the constant temperature drying sterilization, the heating system closes and the forced cooling fans open and feed the filtered fresh clear air into the cabinet(At the same time, the forced hydrofuge fans open and shorten the cooling time). When the temperature in the cabinet ≤40℃( or close to the indoor temperature), the working process stops. And the sound and light hints. Open the door and discharge.
Clean class: high level
Structural features
1. The inside and outside oven are made of the high quality stainless steel. The apperance is flat and level without scratch. The inside tank is welded with argon arc densely and polished precisely. There is arc angle production all around the tank  without dead corner which can be cleaned easily.
2.The convection walls are punched mechanically with microporous adjustment. By adjusting the vent flow, to make the heating distribute averagely.
3 .There are one set of each forced cooling machine and forced moisture removing machine in the oven. When the oven enter the cooling process, the temperature can descend down in very short time to save time and improve the working effect.
4. There are far infrared ray heat tubes which heat up very fast with long service life.
5.  There are double doors in both front and back with interlock device. When one door is open, the other door can not open. It can cut off the cross-ventilation between the bacterium aera and aseptic area.
6. The equipment control system is intelligent temperature controller and temperature recorder. They are advanced and sensitive. The moisture removal temperature and time, constant temperature and cooling temperature can be set once before start the machine.
Production technical requirements
1. The oven housing is made of dull  film faced plywood stainless steel. The shell is plug welded. The surface is smooth and beautiful without soldering, burr and concave. The flatness is 3/1000mm.
2. The box reinforcement is made of angle steel ∠50×50×5mm and channel steel 6.3#. The welding is firm.
3. The oven tank is made of high quality stainless steel SUS3042B δ1.5mm. The inside tank is welded with argon arc densely and polished precisely. There is arc angle production all around the tank  and burnished precisely. The surface is falt and smooth without dead corner which can be cleaned easily.
4. The insulating layer is 150mm thick and filled with excellent high temperature resistent aluminosilicate fiber which have good heat preservation performance. The oven surface temperature is less than 10℃ higher than the environment temperature.
5. The wind direction is horizontal parallel flow from side to side.
6. There are adjustable convection walls which are made  of SUS3042B δ1.2mm on the both sides of the cabinet. The convection walls adopt with the double layer multiblock dislocation microporous regulation with even oblong holes on the surface. The oblong holes are CNC punched. The surface is flat without rags and polished. The convection is express installed considering the easy cleaning and discharging for other reasons during design. It can be installed and discharged conveniently even without any tool. Through adjusting the input and output of the air flow between the two convection walls, the temperature in the tank is uniform. The temperature difference inside ±3℃ under no-load condition.
7. The left side in  the oven is hot air-intake duct. It is allocated with hot air flow rounded strake. In this case, the hot air can pass the air duct convection wall and go into the workroom averagely after forming the air pressure which can makre sure the hot air even. The air pressure is 1500pa. The air flow is 2300m3/h. The air speed is 2m/s.
8. The right side between the tank and the convection wall is return airway. There are  allocated with hot wind deflector in the passage which can keep the hot air go back to the return airway horizontally and effectively when return to prevent the low temperature in at the right bottom of the workroom during return.
9. Installing a long axis centrifugal fan whose fan blades are made of stainless steel 304 δ6.0mm and δ3.0mm in the top of the tank with a volute to feed the hot air into the passage. There is air volume adjustment plate on the volute to let the hot air uniformly. The power of the long axis centrifugal fan is 1.5KW. The air pressure is 1500pa. The air speed is10m/s. The seal between the fan shaft and the tank is mechanical stainless steel seal to prevent the dust into the tank. There are aluminum thermal on the fan shaft to prevent the temperature in the tank from transferring to the motor and burning out the motor.
10. There is a forced cooling fan at the cooling inlet on the top. The power is 0.37KW. The cooling fan can feed  the fresh air into the tank in the short time to cool the materials quickly to save time and improve the effeciency.
11. There is a forced moisture removing fan at the moisture outlet on the top. The power is 0.25KW. It can prevent the air flow back effectively and stop the dust outside to go into the tank to reach the clean requirement.
12. There are double doors in both front and back with interlock device. When one door is open, the other door can not open. It can cut off the cross-ventilation between the bacterium aera and aseptic area.
13. The heating elements are U shape far infrared ray heat tubes which heat up very fast with long service life. They are installed in the air passage on the top. The heating power is 12KW. There are light indicators on the front and back doors with over temperature alarm.
14. The door seals adopt the hight temperature resistant edible silicone rubber which seals very good. They can be used for long time at 300℃.
15.The wind circulation system, ventilation system, intake system and door interlock device are all installed on the top. The electrical apparatus control system is installed on the right side of the oven. They are all closed.
16.  The control system is intelligent temperature controller.  The ventilationl temperature and time, constant temperatureand time, and stopping temperature are set at one time. After starting, the oven control will work according to the set programme until the workroom or the oven stops. This can make sure the control requirement. The operation is simple. The construction is compact. The application is convenient.
17. There is a small and long diagram digital temperature recorder to record the whole process and print the temperature variation condition of the entire work-in-progress.