A refrigeration apparatus comprising: - refrigerant storage means; - a first compartment comprising a refrigerant inlet in fluid communication with the refrigerant storage means and a refrigerant exhaust outlet; and - a second compartment comprising a refrigerant inlet in fluid communication with the refrigerant exhaust outlet of the first compartment, wherein the refrigeration apparatus is configured to feed a refrigerant from the refrigerant storage means to the second compartment via the first compartment, wherein the second compartment comprises a refrigerant exhaust outlet by which the refrigerant is vented to the outside of the refrigeration apparatus, wherein the first compartment and the second compartment are configured to be at different temperatures, wherein the first compartment and the second compartment each comprise a heat exchanger (22, 30), the refrigeration apparatus further comprising: - a first fluid control means for controlling the rate at which refrigerant flows from the refrigerant storage means along a first conduit to the first compartment; - a second fluid control means for controlling the rate at which refrigerant flows from the refrigerant storage means along a second conduit to the second compartment; - temperature sensors (20, 28) for measuring the temperature inside the first compartment and inside the second compartment; and - coupling means disposed between the first compartment and the second compartment, wherein the coupling means is configured to temporarily prevent refrigerant from flowing between the first compartment and the second compartment, and to temporarily couple the exhaust outlet of the first compartment to the outside of the refrigeration apparatus, wherein the first fluid control means and the second fluid control means are configured to feed refrigerant into the first compartment and into the second compartment at different rates when flow of refrigerant between the first compartment and the second compartment is prevented; and - a controller for controlling the coupling means, the first fluid control means, and the second fluid control means according to the measured temperature of the first compartment and second compartment, such that the temperatures of the first compartment and second compartment are individually controllable, wherein the controller is configured to control the coupling means to temporarily prevent refrigerant from flowing between the first compartment and the second compartment, and control the second fluid control means to allow refrigerant to flow into the second compartment, when the temperature of the first compartment is less than or equal to a first threshold or set-point temperature, and when the temperature of the second compartment is greater than a second threshold or set-point temperature, wherein the exhaust outlet of the first compartment comprises a third fluid control means disposed between the coupling means and the outside of the refrigeration apparatus. - refrigerant storage means; - a first compartment comprising a refrigerant inlet in fluid communication with the refrigerant storage means and a refrigerant exhaust outlet; and - a second compartment comprising a refrigerant inlet in fluid communication with the refrigerant exhaust outlet of the first compartment, wherein the refrigeration apparatus is configured to feed a refrigerant from the refrigerant storage means to the second compartment via the first compartment, wherein the second compartment comprises a refrigerant exhaust outlet by which the refrigerant is vented to the outside of the refrigeration apparatus, - a first fluid control means for controlling the rate at which refrigerant flows from the refrigerant storage means along a first conduit to the first compartment; - a second fluid control means for controlling the rate at which refrigerant flows from the refrigerant storage means along a second conduit to the second compartment; - temperature sensors (20, 28) for measuring the temperature inside the first compartment and inside the second compartment; and - coupling means disposed between the first compartment and the second compartment, wherein the coupling means is configured to temporarily prevent refrigerant from flowing between the first compartment and the second compartment, and to temporarily couple the exhaust outlet of the first compartment to the outside of the refrigeration apparatus, wherein the first fluid control means and the second fluid control means are configured to feed refrigerant into the first compartment and into the second compartment at different rates when flow of refrigerant between the first compartment and the second compartment is prevented; and - a controller for controlling the coupling means, the first fluid control means, and the second fluid control means according to the measured temperature of the first compartment and second compartment, such that the temperatures of the first compartment and second compartment are individually controllable, wherein the controller is configured to control the coupling means to temporarily prevent refrigerant from flowing between the first compartment and the second compartment, and control the second fluid control means to allow refrigerant to flow into the second compartment, when the temperature of the first compartment is less than or equal to a first threshold or set-point temperature, and when the temperature of the second compartment is greater than a second threshold or set-point temperature, wherein the exhaust outlet of the first compartment comprises a third fluid control means disposed between the coupling means and the outside of the refrigeration apparatus.