Application scenarios of normally closed vacuum pressure switches

The normally closed vacuum pressure switch is widely used in scenarios where safety protection or fault alarm is required due to its characteristic that the contacts are closed in the initial state and open when the pressure is abnormal (such as insufficient vacuum or excessive pressure). The following is a detailed description of its typical application scenarios:

1.Vacuum system safety protection

Vacuum pump operation protection

In the vacuum pump system, the normally closed switch can monitor the vacuum degree of the system. When the vacuum degree drops below the set threshold (such as in case of leakage or pump failure), the contacts open, cutting off the power supply to the pump or triggering an alarm to prevent the equipment from operating under abnormal conditions.

Vacuum pipeline pressure monitoring

It is used to monitor the pressure changes in vacuum pipelines. If the pressure inside the pipeline abnormally rises due to blockage or leakage, the switch will act to disconnect the circuit to prevent overpressure damage to the pipeline.

2. Automation equipment control

Automatic production line shutdown protection

In vacuum adsorption stations (such as when a robotic arm is grasping workpieces), if the vacuum degree is insufficient, resulting in a decrease in adsorption force, the switch contacts will open, triggering the production line to shut down to prevent the workpieces from falling off or the equipment from being damaged.

Vacuum packaging equipment fault alarm

During the vacuum packaging process, if the pressure in the vacuum chamber does not reach the set value, the switch will open and an alarm will sound, alerting the operator to check the sealing performance or the status of the vacuum pump.

3. Laboratories and scientific research equipment

High vacuum experimental device protection

In physical and chemical experiments, normally closed switches can monitor the vacuum degree of the experimental chamber. If the vacuum degree is abnormal (such as air leakage), the switch will cut off the power supply to protect the experimental samples or equipment from contamination or damage.

Protection of precision instruments such as mass spectrometers

Mass spectrometers and other equipment have extremely high requirements for vacuum environments. Switches can monitor the vacuum degree in real time. When an abnormality occurs, the power supply of the instrument is cut off to avoid data distortion or hardware damage.

4. Safety assurance of medical equipment

Pressure monitoring of hemodialysis machines

In the dialysis machine, the normally closed switch monitors the negative pressure or vacuum degree. If the pressure is abnormal (such as pipeline blockage or leakage), the switch will open and alarm to ensure the safety of the patient during treatment.

Ventilator pressure protection

It is used to monitor the negative pressure environment inside the ventilator. If the pressure exceeds the safe range, the switch will trigger the shutdown or alarm to prevent equipment failure from causing harm to the patient.

5. Environmental protection and energy fields

Fault alarm of the waste gas treatment system

In vacuum waste gas treatment equipment, the switch monitors the vacuum degree. If the pressure is abnormal (such as adsorbent saturation or pipeline blockage), the circuit is disconnected and an alarm is triggered to ensure the efficiency of waste gas treatment.

Protection of vacuum heat collection system

In solar vacuum heat collection tubes, the switch monitors the pressure of the vacuum layer. If the vacuum degree drops (such as when the glass tube breaks), the heating circuit is disconnected to prevent a decrease in thermal efficiency or equipment damage.

6. Industrial process control

Monitoring of vacuum drying and distillation processes

In the vacuum drying or distillation processes of the chemical and pharmaceutical industries, switches are used to monitor the process pressure. When abnormalities occur, the power supply to the heating or vacuum pump is cut off to prevent product quality issues or safety accidents.

Air tightness testing equipment

When used to test the sealing performance of the product, if the vacuum degree does not reach the set value, the switch will open and an alarm will sound, indicating that the product is substandard.

7. Daily Life and Consumer Electronics

Household vacuum sealing machine protection

In the vacuum sealing machine, if the pressure in the vacuum chamber does not meet the standard, the switch will be disconnected and prompt the user to operate again to ensure the preservation effect of the food.

Portable vacuum pump overload protection

In a car vacuum cleaner or air pump, the switch monitors the pressure. If the pressure is too high (such as blocked), the circuit is disconnected to prevent the motor from overloading.

Summary

The core advantage of the normally closed vacuum pressure switch lies in its initial closing and abnormal opening characteristics, making it suitable for scenarios that require safety protection, fault alarm or process control. Its application covers multiple fields such as industry, medical care, scientific research, and environmental protection. By real-time monitoring of vacuum degree or pressure changes, it ensures equipment safety, product quality, and production efficiency.