Patent ID: 9513034
Filing Date: 2016-12-06
CPC Classification: F25B

Claim Text:
1. A multi-type air conditioner comprising: an outdoor unit disposed at an exterior space; a plurality of indoor units disposed at interior spaces; and a mode conversion unit connected to the outdoor unit and the plurality of indoor units through refrigerant pipes used to circulate the refrigerant between the outdoor unit and the plurality of indoor units, wherein the mode conversion unit comprises: a plurality of subcooling units, configured to subcool a refrigerant before the refrigerant is introduced to the plurality of indoor units; a subcooling refrigerant pipe to connect the plurality of subcooling units in series; and a subcooling expansion valve disposed on the subcooling refrigerant pipe to expand a refrigerant before the refrigerant is introduced into the plurality of subcooling units, wherein the refrigerant pipes comprise: wherein the subcooling refrigerant pipe branches from the third refrigerant pipe at a point before the plurality of first branch refrigerant pipes branch from the third refrigerant pipe, connects the plurality of subcooling units in series, and joins the second refrigerant pipe, the subcooling expansion valve is disposed on the subcooling refrigerant pipe at a point between where the subcooling refrigerant pipe branches from the third refrigerant pipe and where the subcooling refrigerant pipe is first introduced into the plurality of subcooling units, and the plurality of subcooling units are provided so that the plurality of first branch refrigerant pipes respectively pass through the plurality of subcooling units so that a refrigerant, which passes through the first branch refrigerant pipes, exchange heat with a refrigerant, which passes through the subcooling refrigerant pipe.