The double door drying and sterilization oven has the characteristics of fast heating, uniform heat distribution, compact structure, and simple operation. The entire system is controlled by PLC and has functions such as process display, data and process display, data and operation recording, fault display, etc., achieving automatic program control of heating, insulation, cooling, dehumidification, and exhaust. This equipment is mainly used for drying, sterilizing, and removing heat sources from heat-resistant items such as penicillin bottles, ampoules, oral liquids, aluminum caps, and other medicinal glassware in the pharmaceutical industry.
Below, the editor will briefly introduce the structural characteristics of the double door drying and sterilization oven, as shown below:
1. Buffer plate, damper, airflow regulator or air baffle
Buffer plates or air deflectors are used to control the air flow of a double door sterilization oven, and are often installed near the intake or exhaust ducts or heaters. The airflow regulator used for positive pressure control can be installed near the filter in the exhaust system to prevent backflow air pollution. By controlling the exhaust volume, positive pressure can be controlled, and the airflow regulator can also be used to control the intake and exhaust airflow to maintain positive pressure. In general, the pressure inside the chamber of a dry heat sterilizer is slightly higher than its adjacent non sterile area and slightly lower than its adjacent sterile area.
2. Filter
In a double door drying and sterilization oven, the inlet air should pass through a filter; Filters are required to remove dust and substances generated in the internal air circulation system; Filters can also be installed to prevent pollution caused by backflow of exhaust air. So the filter must meet the air volume requirements for dry heat sterilization process and be able to withstand the corresponding air pressure.
3. Conveyor belt (only applicable to continuous method)
The speed of the conveyor belt is a crucial factor affecting the sterilization effect in continuous dry heat sterilization systems. At present, most dry heat continuous sterilization ovens are equipped with conveyor belt speed controllers, but there are few speed recording devices. Due to the fact that the speed of the conveyor belt determines the amount of heat received by the material when passing through the sterilizer, its speed record is one of the basic data to prove that the sterilizer operates under control. It is also necessary to keep records of the conveyor speed during each sterilization process in the production process. At the same time, the SOP for dry heat sterilizers should also clearly specify the operating speed range of various sterilization process conveyors, which should be validated and determined.
4. Temperature controller and recorder
In a double door sterilization oven, the temperature detection, sensing, control, and recording system is the foundation of the entire sterilization process control. The control system must ensure that the sterilization temperature inside the sterilizer chamber can be maintained within the set sterilization temperature range, and the recording system must accurately and clearly record the temperature readings of the temperature detection and sensing system.
5. Heater
It is the main component of a double door drying and sterilization oven, which has a significant impact on the sterilization effect. Heater malfunction is one of the main reasons for the decrease in sterilization efficiency of the double door sterilization oven, mainly manifested as a decrease in heating rate; Affects heat distribution; Generate dust substances. The main cause of heater failure is the long-term use of the heater or poor air quality passing through the heater. So generally, a current monitor should be installed in the heating system of the sterilization oven to detect faults in a timely manner.
6. Fan
The airflow circulation in the double door drying and sterilization oven has a significant impact, and the air volume of the fan should be measurable and adjustable. If necessary, the supplier can be requested to add this requirement to their equipment standards, as the measurement indication value of the fan air volume can provide a basis for checking the fan status during equipment use.
7. Operate the chain control system
The interlocking control system in the double door drying and sterilization oven is equipped with: door interlocking control system; Pressure sensor; A temperature sensing, control, and interlocking control device that stops the operation of the conveyor belt to ensure that sterilized items are prevented from passing through the sterilizer below the sterilization temperature in any situation where the temperature is lower than the design requirements.