Application area

  Scientific research and large-scale scientific projects (physics research, astronomy and remote sensing, materials science); Industry and Manufacturing (Semiconductor and Electronic Industry, Chip Manufacturing, Gas Industry and Energy, Special Metallurgy and Materials Processing) Medical and biotechnology (medical imaging, biological sample preservation, cryotherapy); Special industries and cutting-edge fields (aerospace, defense and military, vacuum acquisition technology). Low-temperature refrigeration units not only provide cooling capacity, but more importantly, offer a stable, reliable and controllable extreme low-temperature environment. This environment is a prerequisite for the realization and operation of many cutting-edge technologies in modern times. With the rapid development of fields such as quantum information, life sciences, and frontier physics, the demand for low-temperature refrigeration technologies that can achieve lower temperatures, greater cooling capacity, and greater stability will continue to grow.

Principle of self-cascade refrigeration system:By taking advantage of the characteristic that the boiling points of the co-voltage mixed working medium are different at the same pressure, the cascade refrigeration effect can be achieved with only one compressor. The core principle is as follows: The mixed working medium is compressed by the compressor into high-temperature and high-pressure gas, which then enters the condenser. The high-boiling-point components condense into liquid, while the low-boiling-point components remain in gaseous state. Subsequently, they are separated through a gas-liquid separator. The high-boiling-point liquid working medium after separation is depressified by the throttling valve and then enters the condensing evaporator, serving as the cold source for the low-temperature refrigerant to condense. The low-boiling-point gaseous working medium is cooled and condensed into a liquid in the condenser evaporator, then passes through the throttling valve to reduce pressure and enters the evaporator. After absorbing the user's cooling energy, it evaporates and finally mixes with the uncondensed high-boiling-point working medium vapor, which is then sucked back into the compressor to complete the cycle.

Schematic diagram of self-cascade refrigeration system

The features of the self-cascading low-temperature refrigeration unit

1.Compared with cascade low-temperature refrigeration units, it has a higher refrigeration efficiency, and a single compressor can achieve a low-temperature effect.
2. The unit has a simple structure, stable performance and a low failure rate.
3. The unit has a small installed volume, low operating noise, is environmentally friendly and energy-saving, and is easy to maintain.
4. The investment and operation costs of the unit are low.

Self-overlapping low-temperature test chamber

Self-overlapping low-temperature test chamber