Both are multi-connected central air conditioners, but they refer to different scopes.
VRV is the abbreviation of Varied Refrigerant Volume (Variable Refrigerant Volume), which mainly refers to the variable frequency multi-split unit. It is the first name proposed by Daikin; in China, most of them are directly called variable frequency multi-split units. Domestic manufacturers basically have their own names, such as MDV, GMV, etc.
The multi-connected central air conditioner, according to the relevant definitions of GB/T18837, is divided into digital multi-connected air conditioning units and variable frequency multi-connected air conditioning units; digital multi-connected air conditioning units mainly use "0" and "1" The capacity output is adjusted in the form of on-off. The variable frequency multi-unit air conditioning unit adjusts the capacity output relatively smoothly by changing the operating frequency of the unit.
Frequency conversion technology originally came from Japan, while digital technology originally came from the United States and South Korea.