The ornamental design for a movablerefrigerator, as shown and described.
1. Movable refrigerator
1.1 : Perspective
1.2 : Front
1.3 : Back
1.4 : Left
1.5 : Right
1.6 : Top
1.7 : Bottom
1.8 : Reference
1.9 : Reference
1.10 : Reference
The broken lines shown in reproduction 1.7 indicate portions of the article that form no part of the claimed design. The broken lines shown in reproduction 1.8 indicate the inner refrigerator when the upper door is popped up and form no part of the claimed design. The broken line showing of a driving robot module in reproduction 1.9 and 1.10 are included for the purpose of illustrating environment of the movable refrigerator and forms no part of the claimed design.