ICE MAKING SENSOR

PROBLEM TO BE SOLVED: To detect an ice making state within an ice making tank. SOLUTION: This ice making sensor has a first temperature sensor 3, a second temperature sensor 4 and a container 2. The first temperature sensor 3 is used for sensing a temperature outside the container 2. The second temperature sensor 4 is used for sensing a temperature inside the container 2. The container 2 has a small hole 5 and this sensor is immersed into an ice making tank 7 where water to be changed into ice is filled. Water in the ice making tank 7 passes through the small hole 5 and enters into the container 2. In the case that water and ice are present together yet within the container 2 when the water in the ice making tank 7 is changed into ice, a temperature difference may occur across the container 2. However, when the water in the container 2 is completely changed into ice, the temperature difference is gradually decreased, resulting in that their temperatures may become approximately the same each other. When the second temperature sensor 4 detects an ice making temperature less than 0 deg.C, it is judged that an entire amount of water in the ice making tank 7 is changed into ice.