Air conditioner

Abstract

Even in the case of a large outdoor heat exchanger ( 24 ), it is possible to completely remove frost without reducing the defrosting effect. Provided are: a distributor ( 25 ) installed between the outdoor heat exchanger ( 24 ) and an expansion valve ( 26 ); a plurality of distribution pipes ( 252 ) of which one end is connected to the distributor ( 25 ) and of which the other end is connected to a plurality of heat transfer pipes ( 241 ) of the outdoor heat exchanger ( 24 ); and a bypass pipe ( 30 ) of which one end is connected to a compressor ( 23 ) and diverges on the way, and simultaneously of which the respective plurality of other ends are connected to a connection part between the distribution pipe ( 252 ) and the heat transfer pipe ( 241 ) or in the vicinity thereof.

1 . An air conditioner comprising:
 a refrigerant circuit provided so that a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger are connected;   a distributor provided between the outdoor heat exchanger and the expansion valve;   a plurality of distribution pipes provided to be connected to a plurality of heat transfer pipes in which each one end thereof is connected to the distributor and the other end thereof is provided in the outdoor heat exchanger; and   a bypass pipe having one end connected to the compressor and configured to branch off to form a plurality of the other ends, wherein the plurality of the other ends are provided to be respectively connected between the plurality of distribution pipes and the plurality of heat transfer pipes.   
     
     
         2 . The air conditioner of  claim 1 , further comprising a plurality of auxiliary distributors to which the plurality of heat transfer pipes are connected,
 wherein each of the other ends of the plurality of distribution pipes are respectively connected to the plurality of heat transfer pipes through the auxiliary distributors, and the other ends of the bypass pipe are respectively provided to be connected to the plurality of auxiliary distributors.   
     
     
         3 . The air conditioner of  claim 1 , wherein the outdoor heat exchanger is installed in plurality, and the distributor, the distribution pipe, and the bypass pipe are provided in plurality to correspond to the plurality of heat exchangers. 
     
     
         4 . The air conditioner of  claim 1 , wherein:
 the outdoor heat exchanger includes a plurality of heat exchange units which are classified by the connections to the plurality of heat transfer pipes;   the air conditioner further includes a defrosting controller provided to individually remove frost generated in the plurality of heat exchange units by each of the plurality of heat exchange units; and   the defrosting controller starts to defrost one heat exchange unit, and starts to defrost another heat exchange unit before ending defrosting the one heat exchange unit.   
     
     
         5 . The air conditioner of  claim 4 , wherein the plurality of heat exchange units are provided to be vertically disposed, and the defrosting controller is provided so that defrosting is sequentially performed from the one heat exchange unit which is positioned at an upper side to the another heat exchange unit positioned at a lower side. 
     
     
         6 . The air conditioner of  claim 4 , wherein the outdoor heat exchangers include an upper heat exchange unit, a middle heat exchange unit, and a lower heat exchange unit, and a capacity of the middle heat exchange unit is smaller than that of each of the upper heat exchange unit and the lower heat exchange unit. 
     
     
         7 . The air conditioner of  claim 6 , wherein the defrosting controller is provided to cause the upper heat exchange unit and the middle heat exchange unit to be defrosted simultaneously, to switch to defrosting the lower heat exchange unit when the upper heat exchange unit is completely defrosted, and to cause the middle heat exchange unit and the lower heat exchange unit to be defrosted simultaneously. 
     
     
         8 . The air conditioner of  claim 6 , wherein the defrosting controller is provided so that the middle heat exchange unit starts to defrost between start and end of defrosting of the upper heat exchange unit and the middle heat exchange unit ends defrosting between start and end of defrosting of the lower heat exchange. 
     
     
         9 . The air conditioner of  claim 1 , further comprising a heat storage tank which stores heat of the compressor,
 wherein a refrigerant heated by heat stored in the heat storage tank is provided to be introduced into the outdoor heat exchanger through the bypass pipe.   
     
     
         10 . The air conditioner of  claim 9 , wherein the refrigerant discharged from the heat storage tank flows into the outdoor heat exchanger through the bypass pipe after being introduced into the compressor. 
     
     
         11 . An air conditioner comprising:
 a refrigerant circuit provided so that a compressor, an outdoor heat exchanger including a plurality of distinct heat exchange units, an expansion valve, and an indoor heat exchanger are connected;   a distributor provided between the outdoor heat exchanger and the expansion valve; and   a bypass pipe provided so that one end is connected to the compressor and the other end is connected between the distributor and the outdoor heat exchanger,   wherein the plurality of heat exchange units are each connected to the bypass pipe and individually defrosted by a time difference.   
     
     
         12 . The air conditioner of  claim 11 , wherein the plurality of heat exchange units are vertically disposed in the outdoor heat exchanger, and defrosting is sequentially performed from the heat exchange unit positioned at an upper side to the heat exchange unit positioned at a lower side. 
     
     
         13 . The air conditioner of  claim 12 , wherein the number of the plurality of heat exchange units are provided equal to or more than three, and the one heat exchange unit disposed between the heat exchange units has a capacity smaller than that of each of the other plurality of heat exchange units disposed at the upper and lower sides of the outdoor heat exchanger. 
     
     
         14 . The air conditioner of  claim 12 , wherein the bypass pipe includes a plurality of branch pipes formed by a part of the bypass pipe being branched so that the bypass pipe is connected between the plurality of heat exchange units and the distributor, and each of the plurality of branch pipes is provided with a two way valve. 
     
     
         15 . The air conditioner of  claim 14 , wherein the two way valves are individually opened or closed according to defrosting times of the plurality of heat exchange units. 
     
     
         16 . The air conditioner of  claim 14 , further comprising a plurality of auxiliary distributors provided between a plurality of heat transfer pipes provided in the plurality of heat exchange units and the distributor,
 wherein the plurality of branch pipes are respectively connected to the plurality of auxiliary distributors.   
     
     
         17 . The air conditioner of  claim 11 , wherein the outdoor heat exchanger is installed in plurality, and the distributor and the bypass pipe are provided in plurality to correspond to the plurality of heat exchangers. 
     
     
         18 . The air conditioner of  claim 11 , further comprising a heat storage tank which stores heat of the compressor,
 wherein a refrigerant heated by heat stored in the heat storage tank is provided to be introduced into the plurality of heat exchange units through the bypass pipe.   
     
     
         19 . The air conditioner of  claim 18 , wherein the refrigerant discharged from the heat storage tank is provided to flow into the plurality of heat exchange units through the bypass pipe after being introduced into the compressor. 
     
     
         20 . An air conditioner comprising:
 a refrigerant circuit provided so that a compressor, an outdoor heat exchanger including a plurality of heat exchange units, an expansion valve, and an indoor heat exchanger are connected;   a distributor provided between the plurality of heat exchange units and the expansion valve; and   a bypass pipe provided so that one end is connected to the compressor and the other end is connected between the distributor and the plurality of heat exchange units,   wherein one end of the bypass pipe branches off in plurality and is connected to the plurality of heat exchange units, and a refrigerant discharged from the compressor is individually supplied to the plurality of heat exchange units through a plurality of two way valves provided in the bypass pipe so that frost generated in the plurality of heat exchange units is individually removed.