Detergent supply apparatus and washing machine

1. A washing machine comprising:

a case;

a washing tub that washes laundry;

a storage drawer provided under the washing tub;

a supporting frame provided under the case and having the storage drawer;

a detergent bottle seat provided inside of the storage drawer to receive a detergent bottle containing a liquid detergent;

a detergent reservoir provided inside of the storage drawer and in fluid communication with the detergent bottle;

a connecting part adapted to fix a portion of the detergent bottle to the detergent reservoir such that the liquid detergent can flow through the connecting part and into the detergent reservoir by gravitational force,

a pump provided in the supporting frame to supply the liquid detergent stored in the detergent reservoir to the washing tub;

a detergent fluid passage connecting the detergent reservoir with the pump; and

a detergent fluid passage supporting part connecting the storage drawer with the supporting frame and supporting the detergent fluid passage,

wherein the detergent fluid passage supporting part has joints that retract and extend depending on whether the storage drawer is opened or closed,

wherein the detergent bottle seat is formed in an upper surface of the detergent reservoir, and

wherein the connecting part is connected to the front of the detergent reservoir and the detergent fluid passage is connected to the rear of the detergent reservoir, the front of the detergent reservoir is disposed at the front side of the inside of the storage drawer and the rear of the detergent reservoir is disposed at the rear side of the inside of the storage drawer.

2. The washing machine of claim 1 , wherein the detergent bottle seat is formed to fit a shape of a side surface of the detergent bottle.

3. The washing machine of claim 1 , wherein the detergent bottle seat is formed of an elastic member adapted to conform to a contoured surface of the detergent bottle.

4. The washing machine of claim 1 , wherein the detergent bottle seat includes a detergent bottle support adapted to support the detergent bottle and prevent lateral movement or axial rotation.

5. The washing machine of claim 1 , wherein the connecting part includes:

a detergent inlet adapted to receive a flow of the liquid detergent from the detergent bottle; and

a sealing part adapted to prevent leakage as the liquid detergent flows through the detergent inlet.

6. The washing machine of claim 1 , wherein the connecting part includes:

a detergent inlet adapted to receive a flow of the liquid detergent from the detergent bottle; and

a check valve adapted to prevent back-flow of the liquid detergent from the detergent inlet.

7. The washing machine of claim 1 , wherein the detergent bottle connecting part is inserted into the detergent bottle and adapted to draw the liquid detergent from the detergent bottle.

8. The washing machine of claim 1 , wherein the detergent bottle connecting part includes:

an extension tube inserted into the detergent bottle; and

a connection cap covering an outlet of the detergent bottle and receiving the extension tube therethrough.

9. The washing machine of claim 7 , wherein the detergent bottle connecting part further includes a suction pump to draw the liquid detergent through the extension tube.

10. The washing machine of claim 1 , wherein the pump pumps by extruding the liquid detergent through the detergent fluid passage.

11. The washing machine of claim 1 , further comprising:

a controller adapted to control the liquid supply apparatus to automatically supply the liquid detergent during a washing cycle.