Reflecting shell and temperature detecting device

A temperature detecting device, comprising:

• a measuring device having a detecting part, and
• a reflecting shell including:
• a hollow joint unit, one end of the hollow joint unit having a stationary part, the stationary part being detachably connected with a detecting part of a measuring device;
• a hollow guide unit, one end of the hollow guide unit being connected with the other end of the hollow joint unit, an inner wall of the hollow guide unit having a first reflective surface and a second reflective surface which correspond to each other;
• and
• a hollow receiving unit, one end of the hollow receiving unit being connected with the other end of the hollow guide unit;
• wherein heat radiation from at least one heat source enters the hollow guide unit through the end of the hollow receiving unit which is connected with the hollow guide unit, and the heat radiation is transmitted to the detecting part by the reflection of the first reflective surface and the second reflective surface.