A control device for controlling the operation of a drainage pump with a pump and a washing machine by a linkage method is provided. The drainage pump P is arranged on the drainage pipe. The drainage pump is connected to the corresponding circuit by the single-pole double-throw switch provided so that the drainage pump and the dehydration motor The parallel connection may be formed, and at the same time, the drain pump and the power supply may be turned on. The working status of the drain pump is determined by the switch position of the movable piece on the single pole double throw switch, and the position of the movable piece is switched by the drain valve opening and closing mechanism, Dehydration program controller T, or a combination of both to drive in order to achieve the drainage pump and drainage valve and dehydration device synchronization purposes, and then smoothly and easily complete the drainage process.
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