Providing single servings of cooled foods and drinks
Systems and methods have demonstrated the capability of rapidly cooling the contents of pods containing the ingredients for food and drinks.
1. A machine for producing cooled food or drinks from ingredients in pods, the machine comprising:
an evaporator defining a receptacle sized to receive one of the pods;
a refrigeration system having:
a working fluid loop between a compressor, a condenser, an expansion device, the evaporator and back to the compressor, the working fluid loop having a high-temperature and high-pressure vapor portion from the compressor to the expansion device and having a low temperature, low pressure, two-phase liquid-vapor refrigerant portion from the expansion device to the evaporator;
a bypass line with a bypass valve, the bypass line extending from the working fluid loop between the compressor and the condenser to the working fluid loop between the expansion device and the evaporator; and
a processor configured to control the refrigeration system:
to cool a first one of the pods by flowing refrigerant through the low temperature, low pressure, two-phase liquid-vapor refrigerant portion of the working fluid loop causing a pressure drop in the expansion device and reducing temperature in the evaporator, and
to control the bypass valve to raise pressure and temperature in the evaporator after the first one of the pods is cooled and before a second one of the pods is cooled.
2. The machine of claim 1 , wherein a pod-to-evaporator heat transfer surface of the evaporator is less than 50 square inches.
3. The machine of claim 1 , wherein the evaporator is a cylindrical evaporator that clamps around on the pod in the use.
4. The machine of claim 1 , wherein the evaporator is a cylindrical evaporator that has an open and a closed position, wherein the inner diameter of the evaporator is slightly larger in the open position than in the closed position.
5. The machine of claim 4 , wherein a pod can be inserted into and removed from the evaporator while the evaporator is in the open position.
6. The machine of claim 4 , wherein a pod is cooled by refrigerant flowing through the evaporator while the evaporator is in the closed position.
7. The machine of claim 1 , further comprising a motor configured to move a mixing paddle of a pod in the evaporator receptacle to mix the ingredients in the pod during operation of the refrigeration system.
8. The machine of claim 1 , wherein the compressor is a rotary compressor.
9. The machine of claim 1 , further comprising a dispenser configured to engage with the pod in the receptacle and open the pod to allow the cooled food or drink to be dispensed from the pod.
10. The machine of claim 1 , wherein the expansion device comprises a capillary tube.
11. A machine for producing cooled food or drinks from ingredients in pods, the machine comprising:
an evaporator defining a receptacle sized to receive one of the pods;
a refrigeration system having:
a working fluid loop between a compressor, a condenser, an expansion device, the evaporator and back to the compressor, the working fluid loop having a first portion from the compressor to the condenser and having a second portion from the expansion device to the evaporator;
a bypass line with a bypass valve, the bypass line extending from the working fluid loop between the compressor and the condenser to the working fluid loop between the expansion device and the evaporator; and
a processor configured to control the refrigeration system:
to cool a first one of the pods by flowing refrigerant through the second portion of the working fluid loop to reduce temperature in the evaporator, and
to control the bypass valve to raise temperature in the evaporator after the first one of the pods is cooled and before a second one of the pods is cooled.
12. The machine of claim 11 , wherein a pod-to-evaporator heat transfer surface of the evaporator is less than 50 square inches.
13. The machine of claim 11 , wherein the evaporator is a cylindrical evaporator that clamps around on the pod in the use.
14. The machine of claim 11 , wherein the evaporator is a cylindrical evaporator that has an open and a closed position, wherein the inner diameter of the evaporator is slightly larger in the open position than in the closed position.
15. The machine of claim 14 , wherein a pod can be inserted into and removed from the evaporator while the evaporator is in the open position.
16. The machine of claim 14 , wherein a pod is cooled by refrigerant flowing through the evaporator while the evaporator is in the closed position.
17. The machine of claim 11 , further comprising a motor configured to move a mixing paddle of a pod in the evaporator receptacle to mix the ingredients in the pod during operation of the refrigeration system.
18. The machine of claim 11 , wherein the compressor is a rotary compressor.
19. The machine of claim 11 , further comprising a dispenser configured to engage with the pod in the receptacle and open the pod to allow the cooled food or drink to be dispensed from the pod.
20. The machine of claim 11 , wherein the expansion device comprises a capillary tube.