Vertical blast drying oven is a device used for drying and various temperature adaptability tests in a constant temperature environment. The following is an analysis of common faults and their solutions:
1、 Temperature control malfunction
1. Large temperature fluctuations or non-compliance with standards
-Reason:
-Aging of temperature control system components (such as damaged relays and motherboard circuits);
-Damage or displacement of temperature sensor probe;
-Aging of heating wires leads to uneven heating;
-Fan failure affects the uniformity of thermal cycling.
-Solution:
-Replace aging electrical components and check circuit board connectivity;
-Calibrate or replace the temperature sensor to ensure it is suspended in the center position inside the box;
-Regularly replace the heating wire and clean the dust on the fan impeller;
-Check the fan voltage (up to 220V) and replace the fan if necessary.
2. The temperature display does not match the actual situation
-Reason:
-Mercury thermometer not calibrated or placed in the wrong position (such as directly contacting the shelf);
-Sensor damage or temperature controller deviation.
-Solution:
-Use a certified thermometer to suspend and measure the center temperature inside the box;
-Replace the damaged temperature sensor and adjust the process value deviation of the temperature controller.
2、 Electrical system malfunction
1. The device is unresponsive or not heating up
-Reason:
-Power line issues (such as fuse disconnection, power switch detachment);
-Short circuit or open circuit of electric heating tube;
-Timer function triggered incorrectly (automatically stops heating after reaching the set time).
-Solution:
-Check the power supply, replace fuses or repair switches;
-Use a multimeter to check the resistance of the heating wire (normally several hundred ohms) and replace damaged parts;
-Reset the timer or disable the timer function.
2. Abnormal heating indicator light
-Reason:
-Poor or damaged bulb contact;
-The heating button returns to zero or the circuit is soldered open.
-Solution:
-Replace the light bulb or re weld the circuit;
-Check button settings and power distribution connection status.
3、 Abnormal sensor and display
1. Temperature display jumping or stationary
-Reason:
-The temperature sensor is damaged or has signal interference.
-Solution:
-Replace the sensor and check if the temperature controller needs to repair any software malfunctions.
2. Overtemperature alarm malfunction
-Reason:
-Set the temperature too low or the temperature controller is damaged.
-Solution:
-Adjust the alarm threshold, and if it is ineffective, contact the manufacturer to replace the temperature controller.
4、 Mechanical component issues
1. The fan is not running
-Reason:
-The fan motor is damaged or the impeller is stuck.
-Solution:
-Check the fan voltage, clean or replace the fan.
2. Excessive noise
-Reason:
-The fan bearings lack oil or the shelves are loose.
-Solution:
-Lubricate the fan bearings and tighten the screws on the shelf.
5、 Maintenance and preventive measures
1. Daily maintenance:
-Regularly clean the dust in the fan, heating wire, and inner cavity;
-Check the safety of the power cord and grounding;
-Avoid ingestion of flammable materials, cut off the power and cover with a dust cover when not in use.
2. Usage guidelines:
-The placement of materials should be evenly spaced, leaving space for heat dissipation;
-The temperature setting should not exceed the upper limit of the device to avoid overloading the heating wire.
From the above analysis, it can be seen that the faults of the vertical blast drying oven are mainly caused by aging electrical components, sensor failure, or improper operation. In daily maintenance, attention should be paid to cleaning, calibration, and standardized operation. For complex issues, it is recommended to contact the manufacturer's technical support.