Indoor unit

Abstract

An indoor unit, being configured to constitute a refrigeration apparatus including a refrigerant circuit, includes: a heat exchanger; and a plurality of refrigerant pipes. R32 refrigerant is enclosed in the refrigerant circuit. At least one of the plurality of refrigerant pipes that circulates the R32 refrigerant has an outer diameter of (Do-1)/8 inches while another of the plurality of refrigerant pipes that circulates R410A refrigerant has an outer diameter of Do/8.

1 . An indoor unit being configured to constitute a refrigeration apparatus including a refrigerant circuit, the indoor unit comprising:
 a heat exchanger; and   a plurality of refrigerant pipes,   R32 refrigerant is enclosed in the refrigerant circuit, and   at least one of the plurality of refrigerant pipes that circulates the R32 refrigerant has an outer diameter of (Do-1)/8 inches while another of the plurality of refrigerant pipes that circulates R410A refrigerant has an outer diameter of Do/8.   
     
     
         2 . An indoor unit being configured to constitute a refrigeration apparatus including a refrigerant circuit, the indoor unit comprising:
 a heat exchanger; and   a plurality of refrigerant pipes,   wherein   R32 refrigerant is enclosed in the refrigerant circuit,   at least one of the plurality of refrigerant pipes has an outer diameter of 2/8 inches or less, and   the refrigeration apparatus has a rated capacity of 7.1 kW or more.   
     
     
         3 . The indoor unit according to  claim 1 , wherein
 the plurality of refrigerant pipes includes:
 a liquid refrigerant pipe; and 
 a gas refrigerant pipe, and 
   refrigerant pipe circulates the R410A refrigerant and has an outer diameter of Do/8 inches.   
     
     
         4 . The indoor unit according to  claim 3 , wherein
 the heat exchanger includes a refrigerant flow divider, and   the liquid refrigerant pipe is connected to the refrigerant flow divider.   
     
     
         5 . The indoor unit according to  claim 1 , wherein the rated capacity of the refrigeration apparatus is greater than or equal to 7.1 kW and less than or equal to 16.0 kW. 
     
     
         6 . A refrigeration apparatus including a refrigerant circuit that implements a refrigeration cycle by flow of refrigerant, the refrigeration apparatus comprising:
 the indoor unit according to  claim 1 ;   an outdoor unit; and   a connection pipe that connects the indoor unit and the outdoor unit.   
     
     
         7 . A refrigeration apparatus including a refrigerant circuit that implements a refrigeration cycle by flow of refrigerant, the refrigeration apparatus comprising:
 the indoor unit according to  claim 2 ;   an outdoor unit; and   a connection pipe that connects the indoor unit and the outdoor unit.