Antifreezing apparatus

An anti-freezing apparatus, comprising:

• a main block having an accommodation space formed therein and a water inlet formed on one side thereof so as to communicate with the accommodation space;
• a temperature sensitive member accommodated in the accommodation space and configured to be expanded or contracted in response to a temperature change so that the length of the temperature sensitive member is changed and one end thereof opens and closes the water inlet;
• a first elastic member installed between the temperature sensitive member and the main block and configured to elastically bias the temperature sensitive member in a direction to close the water inlet;
• a connecting rod connected to the other end of the temperature sensitive member so as to protrude from the temperature sensitive member;
• a locking part provided in the accommodation space and having a water passage hole through which water flows;
• a setting adjustment part coupled to an end of the connecting rod and threadedly coupled to the locking part in a rotatable manner;
• and
• a second elastic member installed between the locking part and the main block and configured to elastically bias the locking part toward a locking shoulder formed in the accommodation space.