| 摘要 |
PURPOSE:To enable a selective operation of various operating functions in a simple handling manner, by a method wherein a pump operation is controlled by means of a timer switch, and a circulation control circuit and an operation mode switching circuit are located. CONSTITUTION:A bath 1 and a heat exchanger 2 are connected together through a going pipe 3 and a return pipe 4, and a bypass pipe 5 and an air feed valve V are positioned between a pump P and a water electromagnetic valve WV. An ultrasonic function can be obtained resulting from break of air bubbles fed into a bath by means of the pump P. A timer switch (not shown) controls the operation of the pump P, and simultaneously, it performs one operation which is selected from ultrasonic wave, filtration, and additional burning by means of a rotary switch RSW for an operation mode switching circuit. Where ultrasonic wave is set, a circulating control circuit (not shown) controls the water electromagnetic valve WV. This permits the selective operation of various operating functions in a simple handling manner. |
