Dishwasher

Abstract

A dishwasher includes a tub that defines a washing chamber, a door configured to open and close the washing chamber, a handle disposed at the door, a handle motor configured to drive the handle in a front-rear direction, a first sensor having a first detection distance, and a second sensor having a second detection distance different from the first detection distance. The handle is configured to, based on the first sensor detecting a user, protrude outward in a forward direction from a first position to a second position. The handle is configured to, based on the second sensor detecting the user, move in the forward direction from the second position to a third position.

What is claimed is: 
     
         1 . A dishwasher comprising:
 a tub that defines a washing chamber;   a door configured to open and close the washing chamber;   a handle disposed at the door;   a handle motor configured to drive the handle in a front-rear direction;   a first sensor having a first detection distance; and   a second sensor having a second detection distance different from the first detection distance of the first sensor,   wherein the handle is configured to:
 based on the first sensor detecting a user, protrude outward from the door in a forward direction from a first position to a second position, and 
 based on the second sensor detecting the user, move in the forward direction from the second position to a third position. 
   
     
     
         2 . The dishwasher of  claim 1 , wherein the first detection distance of the first sensor is longer than the second detection distance of the second sensor. 
     
     
         3 . The dishwasher of  claim 1 , wherein the second sensor is disposed above the first sensor. 
     
     
         4 . The dishwasher of  claim 1 , wherein the first sensor is disposed at the door, and the second sensor is disposed above the first sensor. 
     
     
         5 . The dishwasher of  claim 1 , wherein the door comprises a door cover that defines a front surface of the door,
 wherein the first sensor is one of a plurality of first sensors that are disposed at a bottom surface of the door cover and spaced apart from one another, and   wherein the second sensor is disposed inside the handle.   
     
     
         6 . The dishwasher of  claim 1 , wherein a distance between the first position and the second position is shorter than a distance between the second position and the third position. 
     
     
         7 . The dishwasher of  claim 1 , further comprising an interface that is configured to receive a command for operating the dishwasher,
 wherein the handle is configured to, based on the interface receiving a washing operation command, move in a rearward direction from the third position to the second position.   
     
     
         8 . The dishwasher of  claim 1 , wherein the handle is configured to, based on the second sensor failing to detect the user within a reference time in a state in which the handle is disposed at the second position, move in a rearward direction from the second position to the first position. 
     
     
         9 . The dishwasher of  claim 1 , wherein the second sensor is configured to be turned on based on the first sensor detecting the user. 
     
     
         10 . The dishwasher of  claim 9 , wherein the handle is configured to, based on the second sensor failing to detect the user within a reference time in a state in which the handle is disposed at the second position, move in a rearward direction from the second position to the first position while the second sensor maintains a turn-on state. 
     
     
         11 . The dishwasher of  claim 1 , wherein the dishwasher is configured to, based on the second sensor detecting the user during a washing operation, stop the washing operation and control the handle motor to move the handle in the forward direction from the second position to the third position. 
     
     
         12 . The dishwasher of  claim 1 , further comprising a lighting system comprising a light source configured to emit light, the lighting system being configured to define a first pattern of the light at the handle based on the first sensor detecting the user in a state in which the handle is disposed at the second position. 
     
     
         13 . The dishwasher of  claim 12 , wherein the lighting system is configured to vary a color of the light and a length of the first pattern at the handle based on an operating state of the dishwasher. 
     
     
         14 . The dishwasher of  claim 12 , wherein the lighting system is configured to define a second pattern of the light at the handle based on the second sensor detecting the user in a state in which the handle is disposed at the third position. 
     
     
         15 . The dishwasher of  claim 1 , wherein the dishwasher is configured to:
 operate based on (i) the first sensor detecting the user and (ii) the second sensor failing to detect the user while the handle is moving; and   based on the second sensor detecting the user while the handle is moving, perform a safety operation for stopping movement of the handle.   
     
     
         16 . The dishwasher of  claim 15 , further comprising a haptic actuator configured to vibrate the handle during the safety operation. 
     
     
         17 . The dishwasher of  claim 1 , further comprising:
 a door switch configured to detect whether the door is opened or closed; and   a handle switch configured to detect whether the handle is moving.   
     
     
         18 . A dishwasher comprising:
 a tub that defines a washing chamber;   a door configured to open and close the washing chamber, the door being configured to operate in one or more door modes;   a handle disposed at the door, the handle being configured to be located at a first position in a first door mode among the one or more door modes;   a handle motor configured to drive the handle in a front-rear direction;   a first sensor disposed at the door; and   a second sensor disposed above the first sensor and configured to maintain an off-state in the first door mode,   wherein the door is configured to, based on the first sensor detecting a user in the first door mode, switch to a second door mode in which (i) the handle protrudes outward in a forward direction from the first position to a second position and (ii) the second sensor is turned on.   
     
     
         19 . The dishwasher of  claim 18 , wherein the door is configured to, based on the second sensor detecting the user in the second door mode, switch to a third door mode in which the handle moves in the forward direction from the second position to a third position. 
     
     
         20 . The dishwasher of  claim 19 , further comprising:
 an interface configured to receive a command for operating the dishwasher; and   a door switch configured to detect whether the door is opened or closed,   wherein the door is configured to, based on (i) the door being opened and closed in the third door mode and (ii) the interface receiving a washing operation command, switch to an operation mode in which the handle moves from the third position to the second position while the second sensor maintains a turn-on state.