Measurement apparatus and refrigeration system comprising same

A measurement apparatus for a refrigeration system,

• the measurement apparatus configured to be arranged on a pipe between an evaporator and a compressor and configured to measure a liquid content of a medium in the pipe, wherein the measurement apparatus comprises:
• a light transmission member, wherein the light transmission member is arranged on a pipe wall of the pipe, the light transmission member has a certain thickness and has an outer boundary wall and an inner boundary wall forming the thickness, the outer boundary wall has an outer boundary surface on a side opposite to the inner boundary wall, the inner boundary wall has an inner boundary surface on a side opposite to the outer boundary wall, and the inner boundary surface is in contact with the medium in the pipe;
• a light generation device, wherein the light generation device is arranged on the outer boundary surface of the light transmission member, and the light generation device is configured to emit emission light toward the light transmission member that passes through the outer boundary wall and has a preset emission angle (α);
• and
• a light reception device, wherein the light reception device is arranged on the outer boundary surface of the light transmission member, and the light reception device is configured to receive reflection light after the emission light is reflected by the inner boundary wall.