Air conditioning system

Abstract

An air conditioning system includes: a burner unit having a burner and a first casing housing the burner and having an air inlet; and a heat exchanger unit having a heat exchanger through which flammable refrigerant passes, a second casing housing the heat exchanger, and a connection portion connected to a refrigerant connection pipe extending from a heat source unit. The first casing has a first surface, the second casing is disposed to overlap a part of the first surface, the first surface includes a first portion that overlaps the second casing and a second portion not overlapping the second casing. The connection portion is disposed in the second casing to project onto the second portion of the first casing. The air inlet is provided on a surface that is other than the second portion and is at least one of a plurality of surfaces adjacent to the first surface.

1 . An air conditioning system comprising:
 a burner unit including a burner and a first casing that houses the burner and has an air inlet; and   a heat exchanger unit including a heat exchanger through which a flammable refrigerant passes, a second casing that houses the heat exchanger, and a connection portion connected to a refrigerant connection pipe extending from a heat source unit, wherein   the first casing has a first surface,   the second casing is disposed to overlap a part of the first surface,   the first surface includes a first portion that overlaps the second casing and a second portion that does not overlap the second casing,   the connection portion is disposed in the second casing to be projected onto the second portion of the first casing, and   the air inlet is provided on a surface that is other than the second portion and is at least one of a plurality of surfaces adjacent to the first surface.   
     
     
         2 . The air conditioning system according to  claim 1 , wherein the air inlet is provided at a position closer to an end farther from the second casing than an end closer to the second casing on at least one of the plurality of surfaces adjacent to the first surface. 
     
     
         3 . The air conditioning system according to  claim 1 , wherein the air inlet has a plurality of openings, and each of the plurality of openings has a slit shape extending in a direction away from the first surface. 
     
     
         4 . The air conditioning system according to  claim 1 , wherein
 when a surface on which the connection portion is disposed is viewed as a front surface, the first casing further includes a second surface facing the first surface, a third surface located between the first surface and the second surface and defined as a front surface, and a fourth surface and a fifth surface adjacent to both the first surface and the third surface, and   the air inlet is provided in at least one of the fourth surface or the fifth surface.   
     
     
         5 . The air conditioning system according to  claim 1 , wherein
 when a surface on which the connection portion is disposed is viewed as a front surface, the first casing further includes a second surface facing the first surface, a third surface located between the first surface and the second surface and defined as a front surface, and a fourth surface and a fifth surface adjacent to both the first surface and the third surface, and   the air inlet is provided in the third surface and in the fourth surface or the fifth surface.