Thermostat housing , temperature saver and engine cooling system

The utility model provides a thermostat housing, temperature saver and engine cooling system, thermostat housing includes the flange, the flange has first flange face, second flange face, be equipped with the first holding tank and the second holding tank that are used for holding the coolant liquid on the first flange face, first holding tank intercommunication the second holding tank, be equipped with a plurality of fretworks between first flange face and the second flange face, it is wherein, partly the fretwork is followed the circumference of first holding tank distributes, and is partly the fretwork is followed the circumference of second holding tank distributes. Through setting up a plurality of fretworks that distribute along first holding tank or second holding tank circumference between first flange face at the flange and the second flange face, can be under the situation that does not cause first holding tank, second holding tank to leak, the wall thickness that subtracts small flange of great deg