Question

Ice emits energy when it freezes, why does the freezer consume energy then?

Answer 1

what do you mean?? freezer refrigerator??

Answer 2

To keep the ice in a solid state.

Answer 3

Ice can not remain a solid at room temperature, when it melts the particles gain kinetic energy. So when put in a freezer, the energy used to cool the ice relieves these particles of their kinetic energy and turns it into potential energy

Answer 4

ice does not emit energy .. just some other material absorbs energy form ice so it freezes. From the first law of thermodynamics you have energy is conserved.
From second law of thermodynamics you have heat cannot flow from cold object to hot object (unless you apply external energy).

but in freezer, it seems that heat is flowing from ice to environment. so, some work had to be done (and that work done is the energy freezer consumes)