Ultrasonic spoon washing apparatus and method

An ultrasonic spoon washing method, the method comprising the steps:

• providing a spoon accommodation container (53) and a wash tub (20);
• inserting the spoon accommodation container (53) into the wash tub (20);
• primarily washing spoons placed in the spoon accommodation container (53) using washing water and detergent supplied to the wash tub (20) having a vertical sidewall (23) made of a polygonal surface, and at the same time, a spoon support part (50), which is detachably mounted on a rotation support pipe (43) of a forward/reverse rotation support part (40), is rotated forward/in reverse at a first speed to rotate the spoons while primarily washing;
• secondarily washing the spoons using ultrasonic waves, wherein, when the washing water in the wash tub (20) reaches a first water level, the spoon support part (50) is rotated forward/in reverse from the first speed to a second speed to rotate the spoons while secondarily washing and, at the same time, ultrasonic oscillators (30), mounted on an outside of the vertical sidewall (23) of the wash tub, are operated to provide said ultrasonic waves;
• draining wastewater including foreign materials outside of the wash tub (10) through a wastewater and foreign material discharge part (60) after the primarily and the secondarily washing of the spoons are completed;
• rinsing the spoons accommodated in the spoon accommodation container by rotating the spoon support part (50) forward/in reverse at the first speed at the same time while draining the wastewater and the foreign materials through the wastewater and foreign material discharge part (60), wherein, in a state in which the wastewater and foreign material discharge part (60) is open, rinsing water, which has been heated to a temperature of 80-85 C in a rinsing tank (71) of a rinsing water supply part (70), is sprayed evenly together with an amount of a rinsing aid from above a top of the spoon support part (50) through at least one nozzle (73) formed in an injection pipe (72);
• and
• drying the spoons while rotating the spoon support part (50) forward/in reverse so that the rinsing water attached to the spoons accommodated in the spoon accommodation container (53) is removed after the rinsing is completed.