Composition containing refrigerant, use thereof, refrigerator having same, and operation method for said refrigerator

Abstract

The present disclosure provides a mixed refrigerant having four types of performance, i.e., an excellent coefficient of performance and refrigerating capacity that allow it to serve as an alternative refrigerant for R410A, a sufficiently low GWP, and non-flammability. Specifically, the present disclosure provides a composition comprising a refrigerant, the refrigerant comprising trifluoroiodomethane (CF3I) and difluoromethane (R32), wherein the contents of CF3I and R32 in the refrigerant are respectively 48 mass %≥CF3≥46 mass % and 54 mass %≥R32≥52 mass %, based on the total amount of CF3I and R32 taken as 100 mass %.

1 . A composition comprising a refrigerant, the refrigerant comprising trifluoroiodomethane (CF 3 I) and difluoromethane (R32), wherein the contents of CF 3 I and R32 in the refrigerant are respectively 48 mass %≥CF 3 I≥46 mass % and 54 mass %≥R32≥52 mass %, based on the total amount of CF 3 I and R32 taken as 100 mass %. 
     
     
         2 . A composition comprising a refrigerant, the refrigerant comprising trifluoroiodomethane (CF 3 I), difluoromethane (R32), and pentafluoroethane (R125),
 wherein
 when the mass % of R32, R125, and CF 3 I based on their sum is respectively represented by x, y, and z, coordinates (x,y,z) in a ternary composition diagram in which the sum of R32, R125, and CF 3 I is 100 mass % are within the range of a figure surrounded by line segments EF, FD, DX, and XE that connect the following 4 points: 
   point E (53.7, 11.0, 35.3),   point F (51.6, 0.0, 48.4)   point D (65.0. 0.0, 35.0), and   point X (64.6. 8.9, 26.5),   excluding the line segment FD,
 the line segment EF is represented by coordinates (x, −1.1255x 2 +123.76x−3389.3, 1.1255x 2 −124.76x+3489.3), and 
 the line segments FD, DX, and XE are straight lines. 
   
     
     
         3 . A composition comprising a refrigerant, the refrigerant comprising trifluoroiodomethane (CF 3 I) and trans-1,2-difluoroethylene (HFO-1132(E)), wherein the contents of CF 3 I and HFO-1132(E) in the refrigerant are respectively 68 mass %≥CF 3 I≥62 mass % and 38 mass %≥HFO-1132(E)≥32 mass %, based on the total amount of CF 3 I and HFO-1132(E) taken as 100 mass %. 
     
     
         4 . A composition comprising a refrigerant, the refrigerant comprising trifluoroiodomethane (CF 3 I), difluoromethane (R32), and trans-1,2-difluoroethylene (HFO-1132(E)),
 wherein
 when the mass % of HFO-1132(E), CF 3 I, and R32 based on their sum is respectively represented by x, y, and z, coordinates (x,y,z) in a ternary composition diagram in which the sum of HFO-1132(E), CF 3 I, and R32 is 100 mass % are within the range of a figure surrounded by line segments JH, HY, and YJ that connect the following 3 points: 
   point Y (32.5, 58.1, 9.4),   point J (0.0. 77.2, 22.8), and   point H (0.0. 35.0, 65.0),   excluding the line segment JH,
 the line segment YJ is represented by coordinates (x, −0.0027x 2 −0.5002x+77.2, 0.0027x 2 −0.4998x+22.8), and 
 the line segments JH and HY are straight lines. 
   
     
     
         5 . A composition comprising a refrigerant, the refrigerant comprising trifluoroiodomethane (CF 3 I), difluoromethane (R32), and trifluoroethylene (HFO-1123),
 wherein
 when the mass % of HFO-1123, CF 3 I, and R32 based on their sum is respectively represented by x, y, and z, coordinates (x,y,z) in a ternary composition diagram in which the sum of HFO-1123, CF 3 I, and R32 is 100 mass % are within the range of a figure surrounded by line segments ZN, NL, and LZ that connect the following 3 points: 
   point Z (41.6, 53.5, 4.9),   point N (0.0. 77.2, 22.8), and   point L (0.0. 35.0, 65.0),   excluding the line segment NL,
 the line segment ZN is represented by coordinates (x, −0.0007x 2 −0.5402x+77.2, 0.0007x 2 −0.4598x+22.8), and 
 the line segments NL and LZ are straight lines. 
   
     
     
         6 . A composition comprising a refrigerant, the refrigerant comprising difluoromethane (R32), pentafluoroethane (R125), trifluoroiodomethane (CF 3 I), and 2,3,3,3-tetrafluoroethylene (HFO-1234yf), and the refrigerant comprising one of the following refrigerants A and B:
 in a ternary composition diagram in which the total concentration of R32, R123, CF 3 I, and HFO-1234yf is 100 mass %, the concentration of HFO-1234yf is x mass %, and the total concentration of R32, R125, and CF 3 I is represented by (100−x) mass %,   refrigerant A having a composition ratio in which   
       (1)-1. 11.7 mass %≥x≥6.0 mass %, and 
       (1)-2. the concentration of R32, R125, and CF 3 I (concentration of R32 (mass %)/concentration of R123 (mass %)/concentration of CF 3 I (mass %)) is within the range of a quadrilateral or triangle having, as vertices, point C (1.1753x+41.14/−0.2282x+13.464/100−R1234yf−R32−R125), point D (0.0247x 2 +0.563x+43.733/0.0/100−R1234yf−R32−R125), point F (−0.8069x+64.948/0.0/100−R1234yf−R32−R125), and point E (−0.8247x+64.54/0.1581x+8.96/100−R1234yf−R32−R125), excluding the line segment DF; and
 refrigerant B having a composition ratio in which 
 
       (2)-1. 12.6 mass %≥x≥11.7 mass %, and 
       (2)-2. the concentration of R32, R125, and CF 3 I (concentration of R32 (mass %)/concentration of R12S (mass %)/concentration of CF 3 I (mass %)) is within the range of a triangle having, as vertices, point G (−1.2222x 2 +29.589x−123.98/20.5x 2 −510.15x+3173.3/100−R1234yf−R32−R125), point D (1.2213x+39.415/0.0/100−R1234yf−R32−R125), and point F (0.7787x+64.615/0.0/100−R1234yf−R32−R125), excluding the line segment DF. 
     
     
         7 . A composition comprising a refrigerant, the refrigerant comprising difluoromethane (R32), pentafluoroethane (R125), trifluoroiodomethane (CF 3 I), and 1,3,3,3-tetrafluoropropene (HFO-1234ze), and the refrigerant comprising one of the following refrigerants A and B:
 in a ternary composition diagram in which the total concentration of R32, R123, CF 3 I, and HFO-1234ze is 100 mass %, the concentration of HFO-1234ze is x mass %, and the total concentration of R32, R125, and CF 3 I is represented by (100−x) mass %,   refrigerant A having a composition ratio in which   
       (1)-1. 8.3 mass %≥x≥4.0 mass %, and 
       (1)-2. the concentration of R32, R125, and CF 3 I (concentration of R32 (mass %)/concentration of R123 (mass %)/concentration of CF 3 I (mass %)) is within the range of a quadrilateral or triangle having, as vertices, point C (0.0435x 2 +1.4652x+42.543/−0.3726x+13.406/100−R1234ze−R32−R125), point D (0.097x 2 +0.6802x+44.628/0.0/100−R1234ze−R32−R125), point F (−0.8143x+64.967/0.0/100−R1234ze−R32−R125), and point E (−0.0061x 2 −0.7393x+64.254/0.1631x+8.9386/100−R1234ze−R32−R125), excluding the line segment DF; and
 refrigerant B having a composition ratio in which 
 
       (2)-1. 8.9 mass %≥x≥8.3 mass %, and 
       (2)-2. the concentration of R32, R125, and CF 3 I (concentration of R32 (mass %)/concentration of R123 (mass %)/concentration of CF 3 I (mass %)) is within the range of a triangle having, as vertices, point G (0.1667x+56.3/2.7778x 2 −64.944x+357.98/100−R1234ze−R32−R125), point D (1.5625x 2 −24.938x+155.98/0.0/100−R1234ze−R32−R125), and point F (−0.6667x+63.733/0.0/100−R1234ze−R32−R125), excluding the line segment DF. 
     
     
         8 . The composition according to  claim 1 , for use as a working fluid for a refrigerating machine, wherein the composition further comprises a refrigeration oil. 
     
     
         9 . The composition according to  claim 1 , for use as an alternative refrigerant for R410A. 
     
     
         10 . Use of the composition according to  claim 1  as an alternative refrigerant for R410A. 
     
     
         11 . A refrigerating machine comprising the composition according to  claim 1  as a working fluid. 
     
     
         12 . A method for operating a refrigerating machine, comprising circulating the composition according to  claim 1  as a working fluid in a refrigerating machine.