Air-conditioning apparatus

Abstract

An air-conditioning apparatus includes an outdoor unit including an outdoor heat exchanger; an indoor unit including an indoor heat exchanger; and a relay unit provided between the outdoor unit and the indoor unit and including one or more first refrigerant supply pipes and one or more second refrigerant supply pipes that are connected to the indoor heat exchanger of the indoor unit. The one or more first refrigerant supply pipes and the one or more second refrigerant supply pipes protrude from the same side surface of the relay unit. The one or more first refrigerant supply pipes are each provided above an associated one of the one or more second refrigerant supply pipes. Part of the one or more first refrigerant supply pipes that protrudes from the side surface is longer than part of the one or more second refrigerant supply pipes that protrudes from the side surface.

1 . An air-conditioning apparatus comprising:
 an outdoor unit including an outdoor heat exchanger;   an indoor unit including an indoor heat exchanger; and   a relay unit provided between the outdoor unit and the indoor unit, and including one or more first refrigerant supply pipes and one or more second refrigerant supply pipes that are connected to the indoor heat exchanger of the indoor unit,   wherein the one or more first refrigerant supply pipes and the one or more second refrigerant supply pipes protrude from a side surface of the relay unit,   the one or more first refrigerant supply pipes are each provided above an associated one of the one or more second refrigerant supply pipes,   a length of part of the one or more first refrigerant supply pipes that protrudes from the side surface is greater than a length of part of the one or more second refrigerant supply pipes that protrudes from the side surface,   the one or more first refrigerant supply pipes each include: a first pipe fixed to the side surface of the relay unit and a first joint located at a distal end of the first pipe,   the first joint has: a first portion located at the distal end of the first pipe; a second portion that is located at one of ends of the first portion that is closer to the indoor unit, the second portion being connected to the indoor heat exchanger of the indoor unit a third portion that is formed in the shape of a circular tube and located at the other end of the first portion, the other end of the first portion being closer to the relay unit and a brazed portion located between the third portion and the first pipe of the first refrigerant supply pipe, and brazing the third portion to the first pipe of the first refrigerant supply pipe, and   a distance from the side surface to the one of the ends of the first portion is longer than a distance from the side surface to a distal end of the second refrigerant supply pipe.   
     
     
         2 - 3 . (canceled) 
     
     
         4 . The air-conditioning apparatus of  claim 1 , wherein
 the number of the one or more first refrigerant supply pipes is two or more, and the number of the one or more second refrigerant supply pipes is two or more,   any adjacent two of the one or more first refrigerant supply pipes are provided apart from each other, and   any adjacent two of the one or more second refrigerant supply pipes are provided apart from each other.   
     
     
         5 . The air-conditioning apparatus of  claim 1 , wherein
 the one or more second refrigerant supply pipes each include: a second pipe fixed to the side surface of the relay unit; and a second joint located at a distal end of the second pipe,   the second joint includes a first portion, a second portion, a third portion, and a brazed portion,   the first portion of the second joint is located at the distal end of the second pipe,   the second portion of the second joint is located at one of ends of the first portion of the second joint that is closer to the indoor unit, and is connected to the indoor heat exchanger of the indoor unit, and   the third portion of the second joint is formed in the shape of a circular tube, located at the other end of the first portion of the second joint, and fixed to the second pipe of an associated one of the one or more second refrigerant supply pipes by the brazed portion of the second joint, the other end of the first portion being closer to the relay unit.   
     
     
         6 . The air-conditioning apparatus of  claim 1 , wherein
 the one or more first refrigerant supply pipes are each a liquid refrigerant supply pipe through which liquid refrigerant flows, and
 the one or more second refrigerant supply pipes are each a gas refrigerant supply pipe through which gas refrigerant flows.