The LN-C type liquid nitrogen reflux refrigeration machine is a hybrid refrigeration device formed by combining conventional liquid nitrogen with electrical refrigeration, which is a major breakthrough in the field of low-temperature cooling detectors. This product uses a Stirling thermoacoustic electric refrigeration unit as the main working component, which lowers the cold end temperature to the temperature of liquid nitrogen, thereby condensing the gaseous nitrogen inside the Duwa into liquid nitrogen and achieving the recycling of liquid nitrogen.

Functional Features

1. The working life of the refrigeration machine shall not be less than 120000 hours;

2. It can continuously cool the detector for 12 months without the need to replenish liquid nitrogen when powered on;

A 3.30-liter liquid nitrogen tank, filled with liquid nitrogen, ensures a low temperature environment for the detector in the event of a power outage, ensuring continuous normal operation of the system for 10 days;

4. Stirling pulse tube refrigeration;

5. The motor recovers volatile nitrogen gas and compresses it back into liquid nitrogen;

6. Software monitoring of the working status of the refrigeration machine and real-time monitoring of the system's working status;

7. Customized interface design, compatible with various high-purity germanium gamma spectrometers.

Main advantages

Compared with liquid nitrogen refrigeration, condensation refrigeration effectively avoids the frequent addition of liquid nitrogen while ensuring the reliable performance of liquid nitrogen refrigeration, ensuring that the detector works in a low-temperature state for a long time, saving liquid nitrogen materials and labor costs.

Compared with electric refrigeration, condensation refrigeration uses liquid nitrogen as the medium, avoiding direct contact between the detector and the refrigeration machine, greatly reducing the impact of vibration on the performance of the detector. At the same time, it solves a major problem of electric refrigerators losing their cooling capacity in the event of power failure, ensuring that the detector can maintain a low temperature environment even in the event of a power outage, so that it can be quickly used after power is restored.

technical specifications

1. Power consumption: Average power consumption of 160W, system power ≤ 300W

2. Noise: less than 60 decibels at a distance of 1 meter

3. Overall dimensions: φ 460 × 690H (mm, without detector, adjustable height)

4. Working temperature: 0 ℃~40 ℃

5. Working humidity: Relative humidity of 5% to 80% (without condensation)

6. Daily maintenance: Replace or clean the air filter as needed

application area

- Used in conjunction with high-purity germanium detectors

- Used in conjunction with scientific instruments working in other liquid nitrogen temperature zones