How to improve the temperature and humidity uniformity of the blast drying oven
1. Improve the airflow structure of the drying oven:
The quality index of the "temperature uniformity" of the drying oven mainly depends on the structure of the airflow. The drying box usually adopts a single air duct structure to organize the airflow, and the airflow mainly comes from the centrifugal fan system. In this structure, the design of the casing of the centrifuge and the design of the wind deflector are the key to determining the index. Therefore, we first redesigned the volute in strict accordance with the Archimedes spiral principle. The airflow of the air outlet of the volute can be evenly blown through the heater to ensure uniform air supply. In addition, the air outlet and air outlet of the air deflector have also been correspondingly improved to increase the air volume of the air inlet as much as possible, while increasing the air pressure and wind speed of the air outlet. The airflow can be evenly circulated in the working room.
Second, determine the best position of the heater:
Whether the heat dissipated by the heater can be evenly introduced into the working room by the airflow is the key to ensuring the uniformity of the temperature in the working room of the cabinet. Therefore, determining the optimal position of the heater is extremely important. After many repeated experiments, the ideal position of the heater was finally determined, so that the technical indicators in the box were effectively improved.
3. Improve the sample shelf:
The single-air duct airflow structure is destined for the airflow to pass through the sample shelf, the general blast drying oven has at least two layers of shelves and even more special requirements. In the past, the shelves were punched out of plates and dismantled and bent. However, in order to ensure its strength, the aperture density of the shelf cannot be too large, which leads to excessive resistance to the circulation of airflow, which affects the temperature uniformity from the surface. Changing the shelf to a steel wire structure solved this problem.
4. Improve the locking device of the gate:
Due to the high temperature of the drying oven of 400 degrees and above, the material deforms greatly after being heated. In the past, the door of the high-temperature drying oven was locked with a single point, but at a high temperature of more than 400 degrees, the door is deformed and the door is not tightly sealed, resulting in heat leakage of the door. Too low, affecting the uniformity index in the box. We changed the gate to double-point locking so that this problem has been resolved. Through the improvement of the "temperature uniformity" index of 400 degrees and above drying ovens, we have learned a lot from it and accumulated some experience. I believe this will have a certain effect on the future modification of the design of the drying oven.
The quality index of the "temperature uniformity" of the drying oven mainly depends on the structure of the airflow. The drying box usually adopts a single air duct structure to organize the airflow, and the airflow mainly comes from the centrifugal fan system. In this structure, the design of the casing of the centrifuge and the design of the wind deflector are the key to determining the index. Therefore, we first redesigned the volute in strict accordance with the Archimedes spiral principle. The airflow of the air outlet of the volute can be evenly blown through the heater to ensure uniform air supply. In addition, the air outlet and air outlet of the air deflector have also been correspondingly improved to increase the air volume of the air inlet as much as possible, while increasing the air pressure and wind speed of the air outlet. The airflow can be evenly circulated in the working room.
Second, determine the best position of the heater:
Whether the heat dissipated by the heater can be evenly introduced into the working room by the airflow is the key to ensuring the uniformity of the temperature in the working room of the cabinet. Therefore, determining the optimal position of the heater is extremely important. After many repeated experiments, the ideal position of the heater was finally determined, so that the technical indicators in the box were effectively improved.
3. Improve the sample shelf:
The single-air duct airflow structure is destined for the airflow to pass through the sample shelf, the general blast drying oven has at least two layers of shelves and even more special requirements. In the past, the shelves were punched out of plates and dismantled and bent. However, in order to ensure its strength, the aperture density of the shelf cannot be too large, which leads to excessive resistance to the circulation of airflow, which affects the temperature uniformity from the surface. Changing the shelf to a steel wire structure solved this problem.
4. Improve the locking device of the gate:
Due to the high temperature of the drying oven of 400 degrees and above, the material deforms greatly after being heated. In the past, the door of the high-temperature drying oven was locked with a single point, but at a high temperature of more than 400 degrees, the door is deformed and the door is not tightly sealed, resulting in heat leakage of the door. Too low, affecting the uniformity index in the box. We changed the gate to double-point locking so that this problem has been resolved. Through the improvement of the "temperature uniformity" index of 400 degrees and above drying ovens, we have learned a lot from it and accumulated some experience. I believe this will have a certain effect on the future modification of the design of the drying oven.
评论
发表评论