Hey! I need to make a 220volts ac temperature controlled fan from 220v ac supply and i am just a beginner! Can anyone please suggest me how to use a 220v relay in it?

 

Something like this:
1. LM35
2. Op Amp amplify circuit.
3. AC220V to 5Vdc adaptor.
4. AC220V SSR or Relay or Photocouple and TRIAC.

 

Just go out and buy a manual baseboard heater thermostat:

Edit: oops. This might be operating the opposite of what you want. But I have something similar in my greenhouse. The fan comes on when the temperature rises above a set temperature.

 

Here is an AC line voltage thermostat with a SPDT switch:

If you just want cooling only:

http://www.globalindustrial.com/p/h...ge-thermostat-single-pole-cooling-only-et5srs

 

Thanks for your help!