The invention discloses a water injection
system, an ice maker and a refrigerator. The water injection
system comprises a
water storage part, a water requiring part, a
water pipe assembly, a water valve and an emptying part; a waterflow channel located between the
water storage part and the water requiring part is defined by the
water pipe assembly; the water valve is arranged on the
water pipe assembly and controls water discharging of the
water storage part; the emptying part is arranged on the water
pipe assembly and located above the water requiring part and comprises an
airflow channel enabling the waterflow channel to communicate with the outside world, the waterflow channel communicates with the water requiring part through the waterflow channel, and water in the position, located between the emptying part and the water requiring part, of the interior of the waterflow channel completely flows into the water requiring part. Air pressure of the interior of the water injection
system is balanced through the emptying part, water in the water
pipe assembly is emptied in time, and the situation that water freezes in a water
pipe assembly, a pipe is blocked, and
electric heating wires are used is avoided. According to the scheme, the cost is low, no space is wasted, the implementation method is simple and reliable, and the water injection system can be applied to an external
water source or the condition that water flows on the basis of gravity.