Mixture ratio calculation device

A mixture ratio calculation device configured to calculate a mixture ratio of a mixture of fluids containing three or more kinds of fluids, the mixture ratio calculation device comprising:

• a first heat generator configured to heat the mixture of fluids;
• a basic information detector configured to detect basic information on a thermal property value of the mixture of fluids, the thermal property value being predetermined;
• and
• a mixture ratio calculator configured to calculate mixture ratios of the three or more kinds of fluids to the mixture of fluids, wherein
• the mixture ratio calculator is configured to:
• cause the first heat generator to set the mixture of fluids to a first temperature;
• obtain the thermal property value of the mixture of fluids set to the first temperature on a basis of a detection result for the mixture of fluids set to the first temperature from the basic information detector;
• cause the first heat generator to set the mixture of fluids to a second temperature different from the first temperature;
• obtain the thermal property value of the mixture of fluids set to the second temperature on a basis of a detection result for the mixture of fluids set to the second temperature from the basic information detector;
• obtain first relationship information that defines a relationship between the thermal property value of the mixture of fluids set to the first temperature and a mixture ratio of a first fluid contained in the mixture of fluids with respect to the mixture of fluids;
• obtain second relationship information that defines a relationship between the thermal property value of the mixture of fluids set to the second temperature and a mixture ratio of the first fluid to the mixture of fluids;
• and
• calculate the mixture ratios of the three or more kinds of fluids to the mixture of fluids on a basis of the thermal property value of the mixture of fluids set to the first temperature, the thermal property value of the mixture of fluids set to the second temperature, the first relationship information, and the second relationship information.