Measurement apparatus and refrigeration system comprising same

A measurement apparatus for a refrigeration system, wherein the measurement apparatus is 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 controller comprising a processor and a memory;
• a light transmission member arranged on a pipe wall of the pipe, wherein the light transmission member has a 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 emitter arranged on the outer boundary surface of the light transmission member, wherein the light emitter is communicatively coupled to the controller, and the controller is configured to control the light emitter to emit emission light toward the light transmission member and through the outer boundary wall at a preset emission angle (α);
• and
• a light receiver arranged on the outer boundary surface of the light transmission member, wherein the light receiver is communicatively coupled to the controller, and the light receiver is configured to receive reflection light after the emission light is reflected by the inner boundary wall.