Water level sensing apparatus, water supply hose and washing machine having the same

摘要

A water level sensing apparatus which more precisely senses a level of supplied water, a water supply hose and a washing machine having the same is provided. The water level sensing apparatus includes a main body provided with an inner wall and an outer wall and filled with water supplied to the inside of the inner wall, a plurality of electrodes inserted between the inner wall and the outer wall to be opposite to each other, and a micro-computer to judge a water level in the main body through variation of a capacitance value of the plurality of electrodes. Therethrough, the water level sensing apparatus more directly measures a water level, as compared to the conventional water level sensing apparatus, thus improving precision in water level measurement. Thereby, the water level sensing apparatus prevents unnecessary water supply and reduces energy consumption.

主权项

1. A washing machine comprising:
a tub; a water level sensing apparatus; and a connection hose to guide wash water supplied to the inside of the tub of the washing machine to the water level sensing apparatus, wherein: the water level sensing apparatus includes a main body provided with an inner wall and an outer wall and filled with water supplied to the inside of the inner wall, a plurality of electrodes inserted between the inner wall and the outer wall to be opposite to each other, a micro-computer to determine a water level in the main body through variation of a capacitance value of the plurality of electrodes, a plurality of electrode exposure parts protruding through the outer wall of the connection hose to expose the plurality of electrodes which face each other, a connector electrically connecting the plurality of electrode exposure parts to the micro-computer and protruding electrode connection parts corresponding to the plurality of electrode exposure parts to electrically connect the plurality of electrode exposure parts to the micro-computer; and the micro-computer determines the determined water level in the main body to be a level of the wash water in the tub.