Thermoregulator

A thermoregulator, comprising:

• a shell having an inner cavity therein;
• inner and outer valve bodies disposed in the shell and separates the inner cavity of the shell into a first cavity and a second cavity;
• a heat-sensitive element disposed in the shell and adapted to control the inner and outer valve bodies according to temperature;
• an elastic member coupled to the inner valve body,
• wherein the elastic member normally pushes the inner valve body in a first direction from the first cavity toward the second cavity to prevent fluid communication between the first cavity and the second cavity,
• wherein when a temperature of a fluid in the second cavity is higher than a first predetermined temperature and lower than a second predetermined temperature, the heat-sensitive element expands to move the inner valve body in a second direction opposed to the first direction to provide a first flow passage between the first cavity and the second cavity;
• and
• wherein when the temperature of the fluid in the second cavity is equal to or higher than the second predetermined temperature, the heat-sensitive element expands to move the outer valve body through the inner valve body in the second direction to provide a second flow passage.

An apparatus for regulating temperature, comprising:

• a shell comprising a first cavity and a second cavity;
• and
• an inner valve body and an outer valve body disposed in the shell between the first cavity and the second cavity, wherein the inner valve body is movable relative to the outer valve body, and the outer valve body is movable within the shell, and
• wherein:
• the inner valve body and the outer valve body are configured to substantially seal the first cavity from the second cavity when a temperature inside the shell is lower than or equal to a first predetermined temperature,
• the inner valve body is configured to provide a first flow path between the first cavity and the second cavity when the temperature inside the shell exceeds the first predetermined temperature but is lower than or equal to a second predetermined temperature, and
• the outer valve body is configured provide a second flow path between the first cavity and the second cavity when the temperature inside the shell exceeds the second predetermined temperature.