Receiver drier and economizer integration for vapor injection system

A refrigerant circuit comprising:

• a primary circuit including, in an order of a first flow of a refrigerant therethrough, a vapor injection compressor, a condenser, a tank, a primary expansion element, and an evaporator, wherein the tank has a hollow interior including a liquid containing portion occupied by a liquid phase of the first flow of the refrigerant;
• and
• a vapor injection branch pathway extending from a branch point disposed between the condenser and the tank along the primary circuit to a vapor injection port of the vapor injection compressor, the vapor injection branch pathway including, in an order of a second flow of the refrigerant therethrough, a branch expansion element and an economizer, wherein the economizer is at least partially submerged within the liquid containing portion of the tank, wherein the economizer is a heat exchanging structure configured to exchange heat between the first flow of the refrigerant passing over an exterior of the economizer and the second flow of the refrigerant passing through an interior of the economizer.