KR20210036709A - Dishwashing machine - Google Patents

Abstract

The present invention relates to a dishwashing machine. The dishwashing machine according to the idea of the present invention includes a tub, a door and an opening device. The opening device comprises: a motor; a supporter extending to both sides of the motor; a connection gear rotated by the operation of the motor; a connection sensor turned on and off according to the rotation angle of the connection gear; hooks respectively disposed at both ends of the supporter and provided to be coupled to the tub; and an opening sensor turned on when the hooks are coupled to the tub and turned off when the hooks are separated from the tub. An objective of the present invention is to provide the dishwashing machine including the opening device which can be operated normally when the power of the dishwashing machine is forcibly turned off and is turned on again.

Description

Dishwasher {DISHWASHING MACHINE}

The present invention relates to a dishwasher.

In general, a dishwasher is a household appliance that is used to wash food residues on the surface of the dish by washing water. In detail, the dishwasher may be provided with a tub in which a washing chamber is formed, a spray nozzle for spraying high-pressure washing water into the washing chamber, and a seating portion for placing dishes in the tub.

In addition, as the spray nozzle sprays high-pressure washing water onto the dishes mounted on the rack, the dishes may be washed. In addition, the dishwasher is provided with a door rotatably coupled to the tub to open and close the washing chamber. The user may open the washing chamber by rotating the door in the tub, and may store dishes in the washing chamber or take out dishes from the washing chamber.

At this time, for the user's convenience, an opening device for opening the washing chamber by automatically rotating the door has been disclosed in the prior literature as follows.

<Prior literature>

1. European registered patent: EP02394558 (September 21, 2016)

2. Title of invention: dishwasher

The dishwasher described in the prior literature is provided with an opening device that pushes and rotates the upper portion of the door. At this time, by such an opening device, the door is rotated at a relatively small opening angle. Accordingly, in order for the user to store dishes in the washing room or take out dishes from the washing room, the door must be opened again.

That is, there is a problem in that the door cannot be opened completely automatically through the opening device of the prior literature. Accordingly, there is a problem in that the user's convenience cannot be effectively increased.

In addition, in the prior literature, there is a problem that there is no description of a control for normally operating the door or the opening device when the power is forcibly shut down.

An object of the present embodiment is to propose a dishwasher provided with a pair of doors and an opening device for automatically opening the pair of doors in order to solve this problem.

In addition, an object of the present invention is to propose a dishwasher including an opening device that operates normally when the power of the dishwasher is forcibly turned off and the power is turned on again.

The dishwasher of the present invention is a small (compact type) dishwasher having a pair of doors, and has an opening device that automatically opens the door. In particular, the present invention is characterized in that an error occurring in a situation in which the power is forcibly turned off and the power is turned on again is prevented.

A dishwasher according to the present invention includes a tub in which a washing chamber is formed, a door rotatably coupled to the front of the tub to open and close the washing chamber, and an opening device installed on the door so that the door rotates in the tub. Is included.

In the opening device, a motor, a supporter extending to both sides of the motor, a connection gear rotated by the operation of the motor, a connection sensor that is turned on/off according to the rotation angle of the connection gear, and are arranged at both ends of the supporter. And, a hook provided to be coupled to the tub and an opening sensor that is turned on when the hook is coupled to the tub, and turned off when the hook is separated from the tub.

In this case, when the open sensor is turned on and the connection sensor is turned off, a control unit for operating the motor for a predetermined time may be further included.

In particular, when the power is forcibly turned off and then turned on again, the control unit may operate the motor by determining ON/OFF of the open sensor and the connection sensor.

According to the proposed embodiment, as the door is automatically rotated in the tub by the opening device to open the washing room, there is an advantage in that the user's convenience is increased.

In particular, there is an advantage in that the door is automatically opened after washing is completed, so that water vapor present in the tub is ejected to the outside, so that the dishes can be effectively dried.

In addition, there is an advantage that the opening device can operate normally even when the power is forcibly turned off and the power is turned on again.

1 is a view showing a dishwasher according to an embodiment of the present invention.
2 is a diagram illustrating a state in which the door of the dishwasher is opened according to an embodiment of the present invention.
3 is a view showing a state in which the opening device of the dishwasher is installed according to an embodiment of the present invention.
4 is a diagram illustrating an opening device of a dishwasher according to an embodiment of the present invention.
5 and 6 are diagrams showing a partial configuration of an opening device for a dishwasher according to an embodiment of the present invention.
7 to 10 are views showing the operation of the opening device of the dishwasher according to an embodiment of the present invention.
11 is a diagram illustrating an opening sensor of a dishwasher according to an embodiment of the present invention.
12 is a diagram illustrating a connection sensor of a dishwasher according to an embodiment of the present invention.
13 is a diagram illustrating a control configuration of a dishwasher according to an embodiment of the present invention.
14 is a diagram illustrating a control flow of a dishwasher according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible, even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related well-known configuration or function interferes with an understanding of the embodiment of the present invention, a detailed description thereof will be omitted.

In addition, in describing the constituent elements of an embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are for distinguishing the constituent element from other constituent elements, and the nature, order, or order of the constituent element is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to that other component, but another component between each component It should be understood that may be “connected”, “coupled” or “connected”.

1 is a view showing a dishwasher according to an embodiment of the present invention, and FIG. 2 is a view showing a state in which a door of the dishwasher according to an embodiment of the present invention is opened.

As shown in FIGS. 1 and 2, the dishwasher 1 according to the idea of the present invention includes a tub 10 and a door 20.

The tub 10 may be understood as a configuration that forms the exterior of the dishwasher 1. In particular, the tub 10 is provided to form a washing chamber 11 therein. The washing chamber 11 may be understood as a space where washing water is sprayed to wash dishes.

At least one seating portion (not shown) on which dishes or the like are seated may be provided in the washing chamber 11. The seating portion may be formed to allow dishes to be seated and washing water to pass therethrough. For example, the seating portion may form a space in which a tableware is seated by crossing predetermined wires with each other.

In general, the tub 10 is provided in a box shape with an open front surface. Referring to FIGS. 1 and 2, the tub 10 is mounted on a bottom surface, extends upward, and is provided as a rectangular parallelepiped having an inner space.

The door 20 is rotatably coupled to the tub 10 to open and close the washing chamber 11. In particular, as the tub 10 is provided in an open shape, the door 20 is rotatably coupled to the front of the tub 10.

At this time, the door 20 may be provided with switches 23 and 24 operated by a user. The switches 23 and 24 may be provided to be depressed by a user or may be provided in a form that senses a user's contact.

For example, the switch may include a power unit for turning on/off the power of the dishwasher 1 or a plurality of buttons 23 provided as input units for selecting various functions of the dishwasher 1. In addition, the switch includes an opening input unit 24 for opening the door 20.

The door 20 may be provided as a pair of separate doors. The pair of doors 20 may be divided into an upper door 21 and a lower door 22 respectively disposed vertically. For example, the upper door 21 and the lower door 22 may have a rectangular flat plate shape.

In addition, the lower end of the upper door 21 and the upper end of the lower door 22 are arranged to be in contact with each other. At this time, the front of the tub 10 is completely covered by the door 20, and the washing chamber 11 is closed. In particular, the upper door 21 and the lower door 22 may be disposed in close contact with each other to prevent leakage of washing water or the like.

The upper door 21 and the lower door 22 are rotatably coupled to the front surface of the tub 10, respectively. In detail, the upper door 21 is rotated in front of the tub 10 as the upper end becomes a center of rotation. In addition, the lower door 22 is rotated in front of the tub 10 as the lower end becomes a center of rotation.

Accordingly, the front surface of the tub 10 may be opened to expose the washing chamber 11 to the outside. When the washing chamber 11 is exposed to the outside, the user may insert dishes into the washing chamber 11 or retrieve the dishes from the washing chamber 11.

In this case, the dishwasher 1 according to the idea of the present invention may automatically open the door 20 to facilitate the user's convenience. In particular, when washing of the dishes put into the washing chamber 11 is completed, the door 20 may be automatically opened to completely dry the dishes.

To this end, the dishwasher 1 includes an opening device 100 for opening the door 20. Hereinafter, the opening device 100 will be described in detail.

3 is a view showing a state in which the opening device of the dishwasher is installed according to an embodiment of the present invention. 3 illustrates the front of the dishwasher 1 by omitting a part of the lower door 22 for convenience of understanding.

As shown in FIG. 3, the opening device 100 is disposed on the door 20. In particular, the opening device 100 may be installed in at least one of a pair of doors. For example, the opening device 100 may be installed on the lower door 22.

In detail, the lower door 22 may be provided to have a predetermined internal space. In addition, at least a part of the opening device 100 is installed in the inner space of the lower door 22. That is, it can be understood that the opening device 100 is inserted and installed inside the lower door 22. In FIG. 3, in order to show the inner space of the lower door 22, the front end of the lower door 22 is omitted.

In addition, a control device 30 such as a PCB may be installed in the inner space of the lower door 22. Such a control device 30 may be connected to the switches 23 and 24 to perform a command input to the switches 23 and 24. In addition, various devices may be disposed inside the lower door 22, and for convenience of understanding, the remaining configurations are omitted.

Referring to FIG. 2, a door opening hole 102 through which at least a portion of the opening device 100 passes is formed in the lower door 22. Hooks 120 and 130 of the opening device 100 may be disposed through the door opening hole 102. In detail, at least a portion of the hooks 120 and 130 may be disposed to protrude to the outside of the lower door 22 through the door opening hole 102.

In addition, a tub opening hole 12 is formed in the tub 10 at a position corresponding to the door opening hole 102. When the lower door 22 is arranged to close the washing chamber 11, the door opening hole 102 and the tub opening hole 12 are arranged to contact each other. At this time, the door opening hole 102 and the tub opening hole 12 are provided as a pair of spaced apart from each other on both sides.

In addition, at least a portion of the hooks 120 and 130 protruding from the door opening hole may be inserted into the tub opening hole 12. That is, as the hooks 120 and 130 are inserted and installed in the tub opening hole 12, the lower door 22 may be fixed to the tub 10.

For example, a coupling groove (not shown) to which the hooks 120 and 130 are coupled may be formed inside the tub opening hole 12. Accordingly, as the hooks 120 and 130 are coupled to the coupling groove, the lower door 22 may be fixed to the tub 10. In addition, as the lower door 22 is fixed to the tub 11, the washing chamber 11 may be closed.

In addition, when the hooks 120 and 130 are separated from the coupling groove, the lower door 22 is released from the tub 11. Accordingly, the lower door 22 may be rotated in the tub 11 by gravity or an installation structure. In addition, the hooks 120 and 130 may be withdrawn from the tub opening hole 12.

At this time, the upper door 21 is arranged to be connected to the lower door 22 by a link structure (not shown). Such a link structure may be provided inside the tub 11. When the lower door 22 is rotated through this structure, the upper door 21 may be rotated together. That is, a pair of doors is provided to be movable through one opening device 100.

In summary, the lower door 22 is disposed in a fixed state to the tub 10, and the upper door 21 and the lower door 22 close the washing chamber 11. And, when the lower door 22 is released from the tub 10 by the opening device 100, the upper door 21 and the lower door 22 are rotated to open the washing chamber 11 Open.

4 is a diagram illustrating an opening device of a dishwasher according to an embodiment of the present invention.

As shown in Figure 4, the opening device 100 includes a motor 110. The motor 110 may be provided as a one-way motor that rotates only in one direction. Since the motor 110 has a relatively small volume, the space utilization of the lower door 22 can be increased, and is suitable for miniaturization of the dishwasher 1.

In addition, the opening device 100 includes a supporter 140 that is rotatably installed at a predetermined angle. The supporter 140 may be provided in the shape of a rod extending in the left and right directions. In this case, the length in the left and right direction of the supporter 140 may correspond to a separation distance of the door opening hole 102.

The supporter 140 is disposed to extend to both sides around the motor 110. That is, the supporter 140 may be understood as extending to both sides of the motor 110. In this case, due to the internal space limitation of the lower door 22, the motor 110 may be arranged to be skewed toward one side of the supporter 140.

The supporter 140 is rotatably provided by the operation of the motor 110. In detail, by the motor 110, the supporter 140 may be rotated at a predetermined angle.

In addition, the opening device 100 includes a pair of hooks 120 and 130 disposed at both ends of the supporter 140. As described above, the pair of hooks 120 and 130 are provided to protrude from the lower door 22 so as to be coupled to the tub 10. In addition, the pair of hooks 120 and 130 may pass through the door opening hole 102 and be inserted into the tub opening hole 12 to be installed.

The hooks 120 and 130 may be rotated together as the supporter 140 is rotated. That is, the hooks 120 and 130 are installed rotatably in connection with the supporter 140. In this case, the hooks 120 and 130 and the supporter 140 may be connected by a predetermined link structure or the like. This may be modified differently depending on the design, and a detailed description thereof will be omitted.

At this time, when the supporter 140 is rotated at a predetermined angle by the operation of the motor 110, the hooks 120 and 130 may be separated from the tub 10. In detail, the hooks 120 and 130 connected to the supporter 140 are rotated at a predetermined angle and separated from the coupling groove provided in the tub 10. Accordingly, the lower door 22 is released from the tub 10, and the upper door 21 and the lower door 22 are rotated to open the washing chamber 11.

In addition, the opening device 100 includes a gear module 150 connecting the motor 110 and the supporter 140. The gear module 150 may be understood as a configuration in which the supporter 140 rotates at a predetermined angle by the operation of the motor 110. Hereinafter, the gear module 150 will be described in detail.

5 and 6 are diagrams showing a partial configuration of an opening device for a dishwasher according to an embodiment of the present invention. 5 and 6 illustrate the motor 110 and the gear module 150 of the opening device 100.

As shown in FIG. 5, the gear module 150 includes a connection gear 152 that is rotatably provided and a connection rack 200 that is coupled to the connection gear 152 and is provided so as to move upwardly. . That is, the gear module 150 may be understood as a configuration that transforms a rotational motion into a linear motion.

The connection gear 152 is rotated by the operation of the motor 110. In this case, the connection gear 152 may be directly connected to the motor 110 or may be connected through an auxiliary gear 154. The number and size of the auxiliary gears 154 may be provided differently depending on the design.

The connection gear 152 has a connection protrusion 155 spaced from the rotation center to one side and protruding perpendicular to the rotation direction. 5, the connection protrusion 155 may be provided to protrude toward the ground. Accordingly, when the connecting gear 152 is rotated, the connecting protrusion 155 is also rotated with a predetermined radius of rotation.

The connection rack 200 is fitted into the connection protrusion 155 and may move up and down as the connection protrusion 155 is rotated. In addition, the connection rack 200 is moved up and down, and the supporter 140 may be rotated at a predetermined angle. In detail, the connection rack 200 is moved upward and contacts the supporter 140, and one side of the supporter 140 may be pushed and rotated.

6, the connection rack 200 is a connection groove (H) in which a contact connection part 210 and the connection protrusion 155 are inserted and placed in contact with the supporter 140 according to the vertical movement. It is composed of a groove forming portion 220. At this time, the contact connection part 210 is located above the connection groove forming part 220 so that the connection rack 200 is moved upward and contacts the supporter 140.

The contact connection part 210 may be provided in various shapes in contact with the supporter 140. For example, as shown in FIG. 6, the contact connection part 210 may be provided in a rectangular shape extending upwardly.

The connection groove forming part 220 may be provided in a predetermined frame to form the connection groove (H). In this case, the connection groove H may be formed as a first connection end to a fifth connection end. At this time, the connection end is understood as an edge forming the connection groove H, and is divided into five for convenience of description.

In detail, the connection groove H includes a first connection end 224 and a second connection end 222 connected to each other. The first connection end 224 and the second connection end 222 each extend in a straight line and are connected to form an acute angle to each other, that is, the first connection end 224 and the second connection end 222 ), the connection angle (a) is greater than 0 and less than 90 degrees. For example, the connection angle (a) may correspond to 60 degrees.

In addition, it may be understood that a cutting edge 225 is formed between the first connection end 224 and the second connection end 222. In particular, the first connection end 224 and the second connection end 222 form a pointed tip 225 downward. That is, in the connection groove (H), a pointed tip 225 is formed downward.

In other words, the first connection end 224 and the second connection end 222 may form a'V' shape. That is, a part of the connection groove H has a'V' shape.

In addition, the connection groove (H) is a third connection end 226 and a fourth connection end 228 extending from the first connection end 224 and the second connection end 222, respectively, the third connection A fifth connection end 227 extending to connect the end 226 and the fourth connection end 228 is included. Therefore, the connection groove (H) is the first connection end 224, the second connection end 222, the fourth connection end 228, the fifth connection end 227 and the The third connection end 226 is formed in a sequentially extended form.

The third connection end 226, the fourth connection end 228, and the fifth connection end 227 may each extend in a curved shape. That is, the connection groove (H) may be formed in a straight line and a curved line. The third connection end 226 and the fourth connection end 228 extend away from each other in both sides from the first connection end 224 and the second connection end 222. Then, it is bent downward and extends, and is connected by the fifth connection end 227.

With reference to such a shape, the operation of the opening device 100 will be described in detail.

7 to 10 are views showing the operation of the opening device of the dishwasher according to an embodiment of the present invention. 7 to 10 show each state over time. For convenience of description, a part of the opening device 100 is omitted in FIGS. 7 to 10, and a part of the supporter 140 is schematically illustrated.

As described above, the motor 110 is rotated in one direction. Hereinafter, a case in which the motor 110 is operated to rotate the connection gear 152 in a clockwise direction (CW) will be described. For convenience of explanation, the first state shown in FIG. 7 will be described as an initial state.

As shown in FIG. 7, the connection gear 152 is arranged such that the connection protrusion 155 is located on the left side of the rotation center. In addition, the connection rack 200 is disposed so that the connection protrusion 155 contacts the third connection end 226. Then, the motor 110 is operated, and the connection gear 152 is rotated in a clockwise direction.

Accordingly, as shown in Fig. 8, the connection protrusion 255 is also rotated clockwise, and is moved upward and to the right. In addition, the connection protrusion 255 pushes the third connection end 226 upward so that the connection rack 200 is moved upward.

In this case, as shown in FIG. 8, the connection protrusion 255 is moved upward and right to be disposed between the third connection end 226 and the first connection end 224. In addition, the connection end 226 is moved upward and is in contact with the supporter 140.

Subsequently, the connecting gear 152 is rotated in a clockwise direction, and the connecting protrusion 255 is moved upward and to the right. And, as shown in Figure 9, the connection protrusion 255 may be located at the top. That is, the connection gear 152 is disposed so that the connection protrusion 155 is positioned above the rotation center.

At this time, the connection gear 152 is moved upward and right to be disposed between the first connection end 224 and the second connection end 222. That is, the connecting protrusion 152 is located at the tip 224.

In addition, the connection protrusion 255 pushes the first connection end 224 upward so that the connection rack 200 is further moved upward. Accordingly, the connection rack 200 is further moved upward while pushing the supporter 140, and the supporter 140 is rotated at a predetermined angle. That is, the supporter 140 and the hooks 120 and 130 are rotated. Accordingly, the hooks 120 and 130 are disengaged from the tub 10, and the door 20 may be rotated.

That is, when the connecting protrusion 155 is positioned at the top as the connecting gear 152 is rotated, the connecting protrusion 152 is formed between the first connecting end 224 and the second connecting end 222. It is placed on the tip formed in between. Further, the connection rack 200 is located on the upper side, the supporter 140 and the hooks 120 and 130 rotate, and the door 20 rotates.

Subsequently, the connecting gear 152 is rotated in a clockwise direction, and the connecting protrusion 155 is moved downward and to the right. In addition, as shown in FIG. 10, the connection protrusion 155 may be moved from an uppermost end to a lower side to be positioned. That is, the connection gear 152 is disposed so that the connection protrusion 155 is located on the right side of the rotation center.

At this time, the connection gear 152 is moved downward and to the right to be disposed between the second connection end 222 and the fourth connection end 228. Accordingly, the connection rack 200 is moved downward. In this case, as shown in FIG. 8, the connection rack 200 may be disposed in contact with the supporter 140.

That is, the connection rack 200 may be rotated by pushing the supporter 140 only when the connection protrusion 155 is disposed on the tip 225. Specifically, it means only the case where the connecting protrusion 155 is located very close to the tip 225. Accordingly, the time during which the connection rack 200 is positioned on the upper side and the supporter 140 and the hooks 120 and 130 are rotated may be very short.

In other words, the operating time of the opening device 100 for opening the door 20 is provided very short. Accordingly, even immediately after the washing chamber 11 is opened by the opening device 100, the hooks 120 and 130 are properly returned to close the washing chamber 11 again.

Then, the connection gear 152 is continuously rotated in a clockwise direction, and the connection protrusion 155 may be moved from FIG. 10 to the state of FIG. 7. At this time, the connection protrusion 155 is continuously positioned below the center of rotation. Accordingly, the connection rack 200 may be disposed to be spaced apart from the lower portion of the supporter 140.

In this way, as the connection gear 142 rotates one rotation (360 degrees rotation), the connection rack 200 is moved upward and returned. That is, when the connection gear 142 is rotated once, the supporter 140 and the hooks 120 and 130 may be rotated once and returned.

Through this structure, the door can be opened automatically to facilitate the user's convenience. In particular, as the opening device 100 returns quickly, the user can more conveniently use the automatic opening function of the door.

In this case, the dishwasher 1 according to the idea of the present invention may be provided with an opening sensor 300 and a connection sensor 400 for sensing an operating state of the opening device 100. Hereinafter, the open sensor 300 and the connection sensor 400, and a control using the same will be described in detail.

11 is a diagram illustrating an opening sensor of a dishwasher according to an embodiment of the present invention.

As shown in FIG. 11, the dishwasher 1 includes an open sensor 300. In FIG. 11, in order to explain the position of the open sensor 300, the hook 120 is shown together. In addition, a coupling groove 14 formed in the tub 10 so as to be coupled with the hook 120 is shown together.

At this time. The opening sensor 300 is installed to detect whether the hook 120 is coupled to the coupling groove 14. That is, the open sensor 300 is installed to detect the coupling state of the lower door 21 and the tub 10.

In detail, the open sensor 300 may be installed in the coupling groove 14. That is, the open sensor 300 may be installed on the tub 10. In particular, the opening sensor 300 corresponds to a contact sensor that is installed on the tub 10 and detects whether or not it is in contact with the hook 120.

That is, the opening sensor 300 is turned on by sensing a contact when the hook 120 is coupled to the coupling groove 14. On the other hand, when the hook 120 is separated from the coupling groove 14, the open sensor 300 is turned off because no contact is detected.

In summary, the opening sensor 300 is turned on when the hook 120 is coupled to the tub 10, and is turned off when the hook 120 is separated from the tub 10. In other words, the opening sensor 300 is turned on when the door 20 is coupled to the tub 10 and is turned off when the door 20 is separated from the tub 10.

12 is a diagram illustrating a connection sensor of a dishwasher according to an embodiment of the present invention.

12, the dishwasher 1 includes a connection sensor 400. In FIG. 12, in order to describe the connection sensor 400, the connection gear 152 and the connection rack 200 are shown together.

The connection sensor 400 corresponds to a sensor that is turned on/off according to the rotation angle of the connection gear 152. In other words, the connection sensor 400 is turned on/off according to the position of the connection protrusion 155. In particular, the connection sensor 400 may be disposed on the connection protrusion 155.

As shown in FIG. 12, according to the rotation angle of the connection gear 152, it may be divided into zone 1 and zone 2. In other words, the connecting protrusion 155 may be located in any one of ZONE 1 and ZONE 2. At this time, when the connecting protrusion 155 is located in ZONE 1, the gear rack 200 is in contact with the supporter 400. That is, ZONE 1 and ZONE 2 may be classified by the position of the gear rack 200.

In other words, when the connecting protrusion 155 is located in ZONE 1, the supporter 140 and the hook 120 are moved by the gear rack 200. At this time, the connection sensor 400 is turned on when the connection protrusion 155 is located in ZONE 1, and is turned off when the connection protrusion 155 is located in ZONE 2.

Accordingly, the connection sensor 400 is turned on when the supporter 140 and the hook 120 are moved by the upper rack 200. That is, the connection sensor 400 may be understood as a sensor that determines whether the hook 120 is rotated.

13 is a diagram illustrating a control configuration of a dishwasher according to an embodiment of the present invention.

As shown in FIG. 13, the dishwasher 1 according to the idea of the present invention includes a control unit 310. The control unit 310 may correspond to the control device 30 described above. That is, the control unit 310 may be installed inside the lower door 21. In addition, the control unit 210 may be disposed in a different configuration or may be disposed in an external device.

The control unit 310 may receive a user's command through the power supply unit, the input unit 23 and the open input unit 24 described above. That is, when the user selects the power supply unit, the input unit 23 and the open input unit 24, a corresponding signal may be transmitted to the control unit 310.

In addition, the control unit 310 may receive signals from the open sensor 300 and the connection sensor 400. That is, the control unit 310 may check whether the open sensor 300 and the connection sensor 400 are ON/OFF.

In addition, the control unit 310 may operate the motor 110. In detail, the control unit 310 may operate the motor 110 or stop the operation of the motor 110.

The dishwasher 1 further includes a timer 320. The timer 320 may be understood as a configuration for measuring a predetermined time by a signal from the control unit 310.

14 is a diagram illustrating a control flow of a dishwasher according to an embodiment of the present invention.

As shown in FIG. 14, the power of the dishwasher 1 is forcibly turned off (S10), and then turned on again (S20). For example, the power of the dishwasher 1 may be forcibly turned off due to a power outage. Then, when electricity is normally connected again, the dishwasher is turned on again. Alternatively, it can be converted to the ON state by the user.

At this time, it is determined whether the open sensor 300 is OFF (S30). That is, it is checked whether the door 20 is rotated in the tub 10 and the washing chamber 11 is open.

When the open sensor 300 is ON, it is understood that the washing chamber 11 is closed. This is determined as a normal state (S40), and if the dishwashing has been performed, it is continuously performed. If it is in a waiting or terminated state, keep it as it is. That is, when the washing chamber 11 is in a closed state, it is maintained in a state before the power is turned off.

When the open sensor 300 is OFF, it is understood that the washing chamber 11 is open. Then, it is determined whether the connection sensor 400 is ON (S50). That is, it is checked whether the hook 120 is in a rotated state.

When the connection sensor 400 is OFF, it is understood that the hook 120 is not rotated. This is determined as a normal state (S40). When the washing chamber 11 is open and the hook 120 is not rotated, the washing chamber 11 may be closed by a user.

That is, when the user rotates the door 20 toward the tub 10, the hook 120 may be coupled to the tub 10. That is, the washing chamber 11 may be closed by the user.

When the connection sensor 400 is ON, it is understood that the hook 120 is rotated. When the washing chamber 11 is opened and the hook 120 is rotated, the washing chamber 11 cannot be closed by a user. That is, even if the user rotates the door 20 to close the washing chamber 11, the hook 120 is not coupled to the tub 10.

Accordingly, it may cause inconvenience to the user. Therefore, in this case, the motor 110 is operated for a predetermined time (S60). In this case, the predetermined time is referred to as a set time.

In summary, when the power is forcibly turned off and turned on again, it is confirmed that the open sensor 300 is turned off and the connection sensor 400 is turned on. In addition, by operating the motor 110 for a set time, the hook 120 may be returned to a non-rotated state. Accordingly, the user can close the washing chamber 11.

1: dishwasher 10: tub
21: upper door 22: lower door
100: opening device 110: motor
120, 130: hook 140: supporter
155: connecting protrusion 200: connecting rack
300: open sensor 400: connected sensor

Claims (11)

A tub with a washing chamber formed therein;
A door rotatably coupled to the front of the tub to open and close the washing chamber; And
An opening device installed in the door is included so that the door rotates in the tub,
In the opening device,
motor;
Supporters extending to both sides of the motor;
A connecting gear rotated by the operation of the motor;
A connection sensor turned on/off according to the rotation angle of the connection gear;
Hooks disposed at both ends of the supporter and provided to be coupled to the tub; And
And an opening sensor that turns on when the hook is coupled to the tub and turns off when the hook is separated from the tub. The method of claim 1,
The opening device further includes a connection rack coupled to the connection gear so as to move upwardly,
The dishwasher, wherein the supporter is rotated as the connection rack is moved upward so that the hook is separated from the tub. The method of claim 2,
The connecting gear has a connecting protrusion spaced from the rotation center to one side and protruding perpendicular to the rotation direction,
The connecting rack is
A contact connection part in contact with the supporter along the vertical movement; And
And a connection groove forming portion having a connection groove in which the connection protrusion is inserted and disposed. The method of claim 3,
A pointed tip is formed in the lower portion of the connection groove,
When the connection protrusion is disposed to contact the tip, the connection rack is located on the upper portion of the dishwasher, wherein the supporter is rotated. The method of claim 3,
A pointed tip is formed in the lower portion of the connection groove,
When the connection protrusion is disposed to contact the tip, the connection sensor is turned on. The method of claim 1,
The connecting gear has a connecting protrusion spaced from the rotation center to one side and protruding perpendicular to the rotation direction,
The connection sensor is a dishwasher, characterized in that the ON / OFF according to the position of the connection protrusion. The method of claim 1,
The opening device further includes a connection rack coupled to the connection gear so as to move upwardly,
The dishwasher, wherein the supporter is rotated as the connection rack is moved upward, and the connection sensor is turned on. The method of claim 1,
A dishwasher further comprising a controller for operating the motor for a predetermined time when the open sensor is turned on and the connection sensor is turned off. The method of claim 8,
And the controller operates the motor by determining ON/OFF of the open sensor and the connection sensor when the power is forcibly turned off and then turned on again. The method of claim 1,
The door includes an upper door and a lower door arranged side by side in the vertical direction,
The dishwasher, wherein the opening device is installed on the lower door. The method of claim 1,
The motor is a dishwasher, characterized in that the motor rotates in one direction.

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