Abstract: In an example operation method of a controller, a mapping relationship of translation from a first physical block address into a first logical block address is written to a first entry according to a write instruction. The first physical block address is a storage address in a memory, and the first logical block address is a storage address recorded in the write instruction. Storage data is written to the first physical block address. A mapping relationship of translation from the first logical block address into the first physical block address is written to a second entry. When a product of first time and second time is greater than or equal to a first value, the second entry is updated into the memory, wherein the first time is theoretical time for refreshing the first entry, and the second time is theoretical time for refreshing the second entry.

Abstract: An air conditioning indoor unit includes: a main body that includes: a top side; a bottom side; a side part that connects the top side to the bottom side; and an intake surface on the side part; a blow-out panel that covers the bottom side of the main body and that includes a blow-out port; an axial fan inside the main body; a heat exchanger inside the intake surface; and an electric component under the axial fan. The axial fan has an axial direction orthogonal to the top side, and an intake side and a blow-out side when the axial fan is in rotation. The blow-out side is disposed on a lower side of the axial fan and faces the blow-out panel. The heat exchanger surrounds the axial fan.

Abstract: An air conditioning indoor unit includes: a main body that includes: a top side; a bottom side; a side part that connects the top side to the bottom side; and an intake surface on the side part; a blow-out panel that covers the bottom side of the main body and that includes a blow-out port; an axial fan inside the main body; a heat exchanger inside the intake surface; and an electric component under the axial fan. The axial fan has an axial direction orthogonal to the top side, and an intake side and a blow-out side when the axial fan is in rotation. The blow-out side is disposed on a lower side of the axial fan and faces the blow-out panel. The heat exchanger surrounds the axial fan.