Nano-separation refrigeration system and method for refrigeration circulation

A refrigeration circulation method applied in a refrigeration system, wherein the refrigeration system comprises an evaporator, a condenser, and a blower device, the condenser is provided with a condensation cavity, a gas inlet, a gas outlet, and a liquid outlet, a molecular sieve membrane is disposed in the condensation cavity between the gas inlet and the gas outlet;

• the blower device is configured to introduce a mixed gas into the condensation cavity from the gas inlet;
• and the refrigeration circulation method comprises the following steps of:
• filling a mixed gas composed of a refrigerant and a depressurization gas into the refrigeration system, wherein the depressurization gas comprises at least one of hydrogen or helium;
• maintaining a system pressure of the refrigeration system greater than a saturation pressure corresponding to the refrigerant at a preset temperature T, wherein a range of the preset temperature T is 35° C.≤T≤60° C.;
• allowing the mixed gas composed of the refrigerant and the depressurization gas to enter the condenser, allowing the depressurization gas to pass through the molecular sieve membrane and flow out from the gas outlet to enter the evaporator, allowing a partial pressure of the gaseous refrigerant in the condenser to reach a saturation pressure, and starting to condense the gaseous refrigerant into a liquid refrigerant;
• and
• allowing the liquid refrigerant to flow out from the liquid outlet and enter the evaporator to be mixed with the depressurization gas, evaporating the liquid refrigerant into the gaseous refrigerant, and allowing the mixed gas of the refrigerant and the depressurization gas to enter the condenser again under an action of the blower device.