Automatic Low Temperature Control System for Liquid Nitrogen Supply Equipment

Core components and advantages

1. Liquid nitrogen Dewar flask

• Material and StructureAdopting a 304 stainless steel integrated shell, the outer layer is covered with a hexagonal protective net, which combines impact resistance and thermal insulation performance; The inner liner adopts high vacuum insulation technology, effectively reducing liquid nitrogen evaporation loss and extending the service life.

• Valves and pipelinesEquipped with multiple sets of brass material shut-off valves, safety valves, and solenoid valves, coupled with vacuum insulated pipelines, to achieve precise transportation and pressure control of liquid nitrogen; There is a liquid level observation window and pressure gauge at the top for real-time monitoring of the liquid level and pressure status inside the tank.

• adaptabilityDifferent volumes can be customized according to requirements, supporting direct docking with precision analytical instruments such as liquid chromatography-mass spectrometry and gas chromatography to meet diverse low-temperature gas supply needs.

2. PLC intelligent control system (control unit)

• Core controlAdopting MCGS touch screen+PLC programmable logic controller, supportingAuto ModeandManual modeDual mode switching, preset upper and lower pressure limits, achieving closed-loop automatic adjustment of system pressure.

• Easy to operate7-inch high-definition touch screen displays system status intuitively, with one click switching of operating modes and simple and easy to understand parameter settings; Equipped with an emergency stop button, main power switch, and power indicator light to ensure safe operation.

• stable and reliableRated power of 240W, powered by AC220V, with built-in overload protection and pressure abnormal alarm mechanism, it can operate continuously and stably for 24 hours, greatly reducing the cost of manual duty.

• Pipeline allocationEquipped with a multi-channel valve group box, it can achieve multi branch liquid nitrogen distribution, meeting the needs of multiple devices or points for simultaneous liquid supply. The pipeline is wrapped with insulation layer to avoid cooling loss and frosting.

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• Valve group pipeline layout

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• PLC touch screen
  

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• PLC line equipment
  

Application scenarios

• research laboratoryProvide stable liquid nitrogen supply for low-temperature physical property research, superconducting experiments, and biological sample libraries.

• Analytical InstrumentAdapt to the cooling requirements of precision equipment such as liquid chromatography-mass spectrometry, gas chromatography, and electron microscopy.

• industrial productionUsed for industrial scenarios such as low-temperature testing of electronic components, low-temperature processing of materials, and quick freezing of food.

• medical fieldSupport ultra-low temperature storage and transportation of biological samples, vaccines, and cells.

Product Highlights

High degree of automationPLC system realizes automatic control of pressure and flow without frequent manual intervention.Strong securityMultiple safety valves, solenoid valves, and emergency stop designs are used to eliminate risks such as overpressure and leakage.Energy-saving and environmental protectionHigh vacuum Dewar flask+insulated pipeline, minimizing liquid nitrogen evaporation loss to the greatest extent possible.customized servicePipeline layout, control logic, and Dewar flask volume can be customized according to the user's on-site working conditions.Convenient operation and maintenanceModular design allows for quick replacement of vulnerable parts such as valves and solenoid valves, reducing maintenance costs.

Automatic Low Temperature Control System for Liquid Nitrogen Supply Equipment