COMPOSITION CONTAINING REFRIGERANT INCLUDING R32, R125, R143a AND R134a, AND REFRIGERATION METHOD USING SAID COMPOSITION, METHOD FOR OPERATING REFRIGERATOR, AND REFRIGERATOR

A composition comprising a refrigerant that contains R32, R125, R143a, and R134a,

• the composition comprising one member selected from the group consisting of refrigerant A, refrigerant B, and refrigerant C,
• wherein
• the total concentration of R32, R125, and (R143a+R134a) is 100 mass %,
• the ratio of the concentration of R143a to the concentration of (R143a+R134a) is r=100×[R143a/(R143a+R134a)], and
• in a ternary composition diagram in which the total concentration of R32, R125, and (R143a+R134a) is 100 mass %,
• refrigerant A has a compositional ratio as follows
• (1)-1 11≥r≥0,
• (1)-2 the concentration of R32, R125, and (R143a+134a) (the concentration of R32 (mass %)/the concentration of R125 (mass %)/the concentration of (R143a+134a) (mass %)) falls within a triangular region that has the following points as vertices
• point I0≤r≤11 (32.5/−0.0636r+63.5/100−R32−R125),
• point G0≤r≤11 (0.0455r+13.1/−0.5091r+56.5/100−R32−R125), and
• point J0≤r≤11 (32.5/−0.8455r+9.3/100−R32−R125);
• refrigerant B has a compositional ratio as follows
• (2)-1 35.2≥r≥11,
• (2)-2 the concentration of R32, R125, and (R143a+134a) (the concentration of R32 (mass %)/the concentration of R125 (mass %)/the concentration of (R143a+134a) (mass %)) falls within a quadrangular region that has the following points as vertices
• point I11<r≤35.2 (32.5/−0.003r2−0.0072r+63.239/100−R32−R125),
• point G11<r≤35.2 (0.001r2+0.0287r+13.165/−0.0188r2−0.0718r+53.97/100−R32−R125),
• point H11<r≤35.2 (−0.0014r2−0.3292r+36.287/0.0/100−R32−R125), and
• point J11<r≤35.2 (32.5/0.0/67.5);
• and
• Refrigerant C has a compositional ratio as follows
• (3)-1 47.8≥r≥35.2,
• (3)-2 the concentration of R32, R125, and (R143a+134a) (the concentration of R32 (mass %)/the concentration of R125 (mass %)/the concentration of (R143a+134a) (mass %)) falls within a quadrangular region or triangular region that has the following points as vertices
• point I35.2<r≤47.8 (32.5/−0.0169r2+0.9999r+45.073/100−R32−R125),
• point G35.2<r≤47.8 (0.0041r2−0.1818r+16.716/−0.077r2+4.163r−23.0/100−R32−R125),
• point H35.2<r≤47.8 (−0.0011r2−0.3491r+36.712/0.0/100−R32−R125), and
• point J35.2<r≤47.8 (32.5/0.0/67.5).

A method for showing a mixture formulation composed of four refrigerant components with the total concentration of the four refrigerant components taken as 100 mass %, and the concentration of each component taken as a mass %, b mass %, c mass %, and d mass %, the method comprising

• setting the respective concentrations of the four refrigerant components as a mass %, b mass %, and (c+d) mass % as three apparent components;
• showing the respective concentrations of the three components in a ternary composition diagram (ternary diagram) in which the total concentration of the three components is shown as 100 mass %;
• further introducing the mass ratio of c mass % to (c+d) mass %, which is r=100×[c/(c+d)];
• and
• showing the concentration of each of the three components in the ternary composition diagram for each value of r.