As an important safety equipment used for centralized collection and temporary storage of chemical waste liquids in laboratories, the normal operation of the waste liquid cabinet is of great significance for ensuring the health of laboratory personnel and preventing environmental pollution. However, in daily use,Waste liquid cabinetVarious malfunctions may occur due to improper operation, aging of components, or insufficient maintenance. Mastering the troubleshooting and repair methods for common faults helps to promptly eliminate hidden dangers and ensure the safe and efficient operation of waste liquid treatment work.

1、 Abnormal ventilation system: reduced air volume or no air flow

This is one of the more common issues. Possible reasons may include blocked exhaust vents, damaged fans, saturated filters, or power failures. When troubleshooting, first check whether there are foreign objects blocking the exhaust duct and clean the accumulated dust; Confirm if the fan is operating normally. If any abnormal noise or failure to turn is found, replace the motor or contact the manufacturer for repair; If it is an activated carbon filter, it should be checked whether it has been saturated with adsorption, and if necessary, a new filtering device should be replaced; Later, check if the power connection is secure and if the air switch has tripped.

2、 Leakage alarm function failure

Some waste liquid cabinets are equipped with liquid leakage detection and alarm devices. Once the alarm fails, it will bring serious safety hazards. Firstly, check if the sensor probe is covered or displaced by dirt, clean it with clean water, and reinstall it; Next, confirm whether the alarm circuit is open or the control module is faulty. You can use a multimeter to test the continuity of the circuit; If it cannot be repaired by oneself, professional technicians should be contacted in a timely manner for handling.

3、 The cabinet door is not tightly sealed or difficult to close

Poor sealing of cabinet doors can cause harmful gases to escape, affecting indoor air quality. The common reasons are aging or deformation of door seals or deformation of cabinet structures. Regularly check the status of the door seal, and replace it promptly if it is damaged or loses elasticity; At the same time, check whether the hinges are loose and adjust or reinforce them if necessary to ensure that the cabinet door is tightly closed.

4、 Leakage of waste liquid tank or detachment of connecting pipe

The rupture of the waste liquid tank or diversion pipe can cause liquid leakage, pollute the environment, and even lead to safety accidents. Before use, check whether the waste liquid tank is intact and free of cracks, and whether the interface is tightly connected; Regularly replace aging or corroded hoses to avoid prolonged exposure to strong acid or alkali waste liquids that may cause material degradation; Suggest placing a secondary leak proof tray under the waste liquid tank to enhance safety.

5、 Obvious odor or presence of irritating gases in the air

If there is a noticeable chemical odor during use, it indicates that there is a problem with the sealing or ventilation system. The operation should be stopped immediately, and all connection parts should be checked for good sealing and ventilation openings working properly. The overall ventilation measures in the laboratory should be strengthened to ensure personnel safety.

　　Waste liquid cabinetIt is an important component of laboratory safety management. Regular inspections and timely troubleshooting can effectively prevent accidents from occurring. It is recommended to establish a comprehensive maintenance record system, combined with professional training, to enhance the safety awareness and emergency response capabilities of operators, and create a safer and more standardized working environment for the laboratory.