KR20200070624A - Refrigerator and control method thereof - Google Patents

Abstract

An embodiment of the present invention relates to a refrigerator and a control method of the refrigerator. The refrigerator comprises: a cabinet having an upper storage space and a lower storage space; a drawer door provided to be drawn in and out of the lower storage space and opening and closing the lower storage space; a raising and lowering device provided inside the drawer door to place food, and raised and lowered in a vertical direction; a drawing-in and out motor for providing power for the drawing-in and out of the drawer door; a raising and lowering motor connected to the raising and lowering device and providing power for raising and lowering of the raising and lowering device; an operation unit into which a user manipulation for the operation of the drawer door is input; and a control unit for controlling the operations of the drawing-in and out motor and the raising and lowering motor according to a raising and lowering mode set by the user. The raising and lowering mode is set to either a mode in which the drawing-in and out of the drawer door and the raising and lowering of the raising and lowering device are continuously completed by a single operation of the operation unit, or a mode in which the drawing-out of the drawer door and the raising and lowering of the raising and lowering device are completed in stages in response to multiple operations of the operating unit. According to the present invention, the direct manipulation of the refrigerator is minimized, thereby increasing usability.

Description

Refrigerator and refrigerator control method {Refrigerator and control method thereof}

The present invention relates to a refrigerator and a method for controlling the refrigerator.

Generally, a refrigerator is a household appliance that allows food to be stored at a low temperature in an internal storage space shielded by a door. To this end, the refrigerator is configured to store stored foods in an optimal state by cooling the inside of the storage space by using cold air generated through heat exchange with a refrigerant circulating in a refrigeration cycle.

2. Description of the Related Art Recently, refrigerators are gradually becoming large-scale and multi-functional according to changes in eating habits and upgrading of products, and refrigerators having various structures and convenience devices for efficiently using the user's convenience and the interior space have been released. .

The storage space of the refrigerator can be opened and closed by a door. In addition, the refrigerator may be classified into various types of refrigerators according to the arrangement of the storage space and the structure of a door that opens and closes the storage space.

The refrigerator door may be classified into a pivoting door in which a storage space is opened and closed by rotation, and a drawer-type door that is drawn in and out by a drawer.

In addition, the drawer-type door is often disposed in the lower region of the refrigerator. When the drawer-type door is disposed in the lower region of the refrigerator, the waist or the lower basket must be bowed to take out the basket or food accommodated inside the drawer-type door. If the weight of the food is heavy, the basket may be more uncomfortable or an injury may occur.

In order to solve this problem, various structures have been developed in which a drawer-type door can be lifted.

Representatively, U.S. Patent No. 9,377,238 discloses a refrigerator equipped with a lifting mechanism for elevating a bin provided in a refrigerator compartment.

An object of the present invention is to provide a refrigerator and a control method of a refrigerator, which can be set by selecting a draw-in/out mode of the drawer door according to a user's operation.

An object of the present invention is to provide a refrigerator and a method of controlling a refrigerator, which allow the drawer door to be drawn in and out continuously by a user's selection.

An object of the present invention is to provide a refrigerator and a control method of a refrigerator, which can be performed by automatic or manual operation according to a user's selection.

An object of the present invention is to provide a refrigerator and a control method of a refrigerator in which the drawer door is brought in and out according to the user's stepwise operation.

An object of the present invention is to provide a control method of a refrigerator and a refrigerator capable of omitting the lifting of the lifting device and retracting the drawer door according to a user's operation while the drawer door is withdrawn. .

A control method of a refrigerator according to an embodiment of the present invention includes: a lift mode setting step of setting a lift mode of a drawer door; A manipulation input step in which a user manipulates a manipulation unit to start withdrawing the drawer door; A drawer door withdrawal step in which the drawer door is opened by the user's manipulation and the drawer door is opened by being driven; A lifting device elevating step in which the elevating motor is driven after the withdrawal of the drawer door is completed, and the elevating device is elevated to a set height; And a drawer door closing step in which the drawer door is closed after completion of the lowering of the hoisting device. And a mode in which completion of the drawer door and elevation of the lifting device are completed step by step in response to a plurality of operations of the operation unit and a completion mode.

The elevating mode set in the elevating mode setting step may be output through a display to output a current setting state.

The elevating mode set in the elevating mode setting step may be output through a speaker to output a current setting state.

In the step of setting the lift mode, it is possible for a user to input and set the lift mode through manipulation of a display.

In the step of setting the elevating mode, it is possible for the user to set the elevating mode through manipulation of the manipulation unit.

It is possible that either of the elevating modes is executed according to the number of manipulation inputs of the manipulation unit.

It is possible that any one of the elevating modes is executed according to the operation input time of the operation unit.

In the operation input step, it is possible to determine a valid operation signal when the operation signal of the operation unit is input while the user's proximity is recognized by the proximity detection device.

The elevating mode includes an automatic elevating mode in which the drawer door withdrawal step, the elevating device elevating step, and the drawer door entering step are continuously performed without additional manipulation when the manipulation unit is operated; When the operation of the operation unit, the drawer door withdrawal step is performed, and after the drawer door withdrawal step is completed, it may be possible to be set to any one of a manual elevating mode in which the elevating device elevating step is performed upon further manipulation of the operation unit.

The elevating device elevating step includes: an elevating device raising step in which the elevating device is driven to raise the elevating device while the drawer door is completely withdrawn; When the hoisting device reaches a set height, the hoisting device stopping step of maintaining the state in which the drive of the hoisting motor is stopped; And when the set time elapses after the start of the lifting device stop step, it is possible that the lifting motor is driven to lower the lifting device lowering the lifting device to the initial position.

If the operation unit is operated before the set time has elapsed in the step of stopping the lifting device, the lifting device can be lowered immediately.

After the drawer door withdrawal step is finished, it is possible to operate the manipulation unit so that the drawer door is closed again.

If the manipulation unit is operated while the drawer door withdrawal step is performed, it is possible that the withdrawal motor is stopped.

It is possible to perform the drawer door drawing step when the drawer door is stopped during a predetermined time or more while the drawer door drawing step is performed.

If the manipulation unit is operated while the drawer door is stopped while performing the drawer door extraction step, it is possible to perform the drawer door drawing step.

When the drawer door is pulled out and the door is pushed while the drawer door is being pulled out to input a push operation, it is possible to perform the drawer door pulling-in step.

A refrigerator according to an embodiment of the present invention includes a cabinet provided with an upper storage space and a lower storage space; A drawer door provided to be drawn in and out of the lower storage space and opening and closing the lower storage space; A lifting device provided inside the drawer door to seat the food and elevate in the vertical direction; A drawer motor that provides power for drawing in and out of the drawer door; An elevating motor connected to the elevating device and providing power for elevating the elevating device; An operation unit to which a user's operation for operation of the drawer door is input; And the control unit includes a control unit for controlling the operation of the take-off motor and the lifting motor according to the lifting mode set by the user, the lifting mode, the drawer door of the drawer door by a single operation of the operation unit and the Characterized in that it can be set to any one of a mode in which the lifting of the lifting device is continuously completed, and a mode in which the drawing of the drawer door and the lifting of the lifting device are completed stepwise in response to a plurality of manipulations of the operation unit.

It is possible that a display for displaying the set lift mode is further provided.

The display may be a touch display capable of inputting the lift mode.

It is possible that the automatic lift mode or the manual lift mode can be selectively input for setting the drawer door according to the operation time or the number of manipulations of the operation unit.

The following effects can be expected in the refrigerator and the refrigerator control method according to the proposed embodiment.

The refrigerator according to an embodiment of the present invention is configured such that a part of the storage space inside the drawer door can be lifted while the drawer door is pulled out. Therefore, the user does not have to bow excessively when receiving food inside the drawer door disposed at the lower side, so that the user convenience can be improved.

In addition, when the user operates the operation unit, the drawer door is configured to be continuously drawn in and out, and thus, it is possible to minimize the direct operation of the refrigerator to improve ease of use.

In addition, the drawer door may be the step in and out, respectively, may be performed step by step, so that the corresponding operation is performed according to the user's operation, according to the user's intention to have a variety of environments, the drawer door withdraw and enter is appropriately There is an advantage that can be used.

In particular, the user may set the lift mode of the drawer door to an automatic lift mode or a manual lift mode, and may select and use a lift mode desired by the user according to a food storage environment and a usage pattern of a refrigerator. Therefore, there is an advantage that the usability can be further improved.

In addition, the lift mode set by the user may be displayed through the display to display the currently set lift mode to further improve ease of use.

In addition, when the drawer door is being pulled out or withdrawn, the lifting of the lifting device is omitted according to a user's operation, and the drawer door may be re-entered immediately. Therefore, when the user does not actually want to lift the drawer door and only wants to check the food received through the drawer door, the unnecessary lift operation can be omitted to improve the convenience of use while preventing unnecessary cold air loss. There are advantages.

1 is a front view of a refrigerator according to an embodiment of the present invention.
Figure 2 is a cross-sectional view schematically showing the lifting state of the lower drawer door of the refrigerator according to an embodiment of the present invention.
3 is a perspective view of the container of the lower drawer door is separated.
Figure 4 is an exploded perspective view of the drawer portion and the door portion of the lower drawer door as viewed from the front.
5 is a rear view of the door unit.
6 is a rear view of a state in which the door cover of the door is removed.
7 is a perspective view of the driving device in a state where the driving device and the lifting device are connected.
8 is a front perspective view of the driving device.
9 is a front perspective view showing the internal structure of the driving device.
10 is a partially enlarged view showing a structure in which power is transmitted to a screw of the driving device.
11 is a perspective view of the drawer unit.
12 is an exploded perspective view of the drawer unit.
13 is a perspective view of a lifting device according to an embodiment of the present invention.
14 is a view showing a state in which the upper frame of the lifting device is raised.
15 is a view showing a state in which the lever of the present invention is connected to the lifting device.
16 is a block diagram schematically showing a connection between a control unit and components connected to the control unit according to an embodiment of the present invention.
17 is a flow chart showing the withdrawal and elevation operation of the drawer door.
18 is a perspective view of the drawer door closed.
19 is a perspective view of a state in which the drawer door is completely withdrawn.
20 is a cross-sectional view showing a state of the drawer unit in the state of FIG. 19.
21 is a perspective view showing states of the driving device and the lifting device in the state of FIG. 19.
22 is a cross-sectional view showing a state of the drawer unit in a state where the lifting device is raised.
23 is a cross-sectional view showing a state of the drawer unit in a state in which the lifting device has been raised and is waiting.
24 is a perspective view showing states of the driving device and the lifting device in the state of FIG. 23.
25 is a cross-sectional view showing a state of the drawer unit in a state in which the lifting device is lowered.
26 is a cross-sectional view showing a state of the drawer unit in a state in which the drawer door is drawn.
27 is a flowchart illustrating an operation for adjusting the waiting time of the lifting state of the lifting device.
28 is a flowchart illustrating an operation for performing the withdrawal and lifting operation of the drawer door by individual manipulation of the user.
29 is a flowchart illustrating an operation of closing the drawer door and closing it again.
30 is a flowchart illustrating an operation when an obstacle is recognized during withdrawal of the drawer door.
31 is a flowchart illustrating an operation when an obstacle is recognized during the entry of the drawer door.
32 is a flowchart illustrating an operation when an obstacle is recognized during the ascent of the lifting device.
33 is a flowchart illustrating an operation when an obstacle is recognized during the descent of the lifting device.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing embodiments of the present invention, when it is determined that detailed descriptions of related well-known configurations or functions interfere with understanding the embodiments of the present invention, detailed descriptions thereof will be omitted.

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

1 is a front view of a refrigerator according to an embodiment of the present invention. And, Figure 2 is a cross-sectional view schematically showing the lifting state of the lower drawer door of the refrigerator according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, the refrigerator 1 may have an outer shape formed by a cabinet 10 forming a storage space and a door 2 shielding the opened front surface of the cabinet 10. have.

The storage space inside the cabinet 10 may be divided into a plurality of spaces. For example, the space 11 above the cabinet 10 may be divided into a refrigerator compartment and the space 12 below may be divided into a freezer compartment. Of course, the upper space and the lower space may be divided into independent spaces that are maintained at different temperatures rather than a refrigerating or freezer compartment, and may be referred to as upper and lower spaces.

The door 2 may include a rotating door 20 that opens and closes the upper space by rotation, and a drawer door 30 that opens and closes the lower space by draw-out. The lower space may be divided up and down again, and the drawer door 30 may include a drawer door 30 provided at an upper portion and a drawer door 30 provided at a lower portion.

In addition, the rotary door 20 and the drawer door 30 are formed of a metal material to form an exterior exposed to the front.

The present invention has been described based on the refrigerator in which the rotary door 20 and the drawer door 30 are disposed together, but the present invention is not limited to this, and in all types of refrigerators equipped with drawer-type doors. It will be applicable. And, the rotary door 20 is provided on the upper side can be called an upper door, and the drawer door 30 is provided on the lower side to be called a lower door.

At least a transparent panel 21 of the rotating door 20 may be configured. The transparent panel 21 may have a structure capable of high-inner perspective. For example, a lighting device (not shown) may be provided on the inside of the storage space or on the rear surface of the rotating door 20, and the inside of the high light becomes bright according to the on/off of the lighting device, so that the high through the transparent panel 21 is possible. Selective viewing on the inside is possible.

On the other hand, the transparent panel 21 may be composed of a plurality of panels, it is possible to prevent the cooling performance of the high inner side is lowered by forming an insulating space between the plurality of panels. In addition, a display 211 may be provided inside the transparent panel 21. Therefore, it may also be possible to output the screen through the transparent panel 21.

The display 211 may be installed on the entire transparent panel 21 or may be partially installed. Of course, the display 211 may be installed on the entire transparent panel 21 and partially output.

In addition, the transparent panel 21 may include a touch sensor, touch the screen output through the display 211, and may input an operation of the refrigerator 1. Accordingly, a screen output through the display 211 may function as an operation unit, and the display 211 may be referred to as an operation unit.

In addition, the transparent panel 21 may be configured as a separate door, and may be configured to open and close the opening of the transparent panel 21 to access the basket 212 provided in the rotating door 20. have. That is, the rotary door 20 may be configured as a double door so that both the opening and closing of the rotating door 20 and the opening and closing of the transparent panel 21 are possible.

On the other hand, the rotating door 20 may not be provided with a transparent panel 21, in this case, a separate display for displaying the operating state of the refrigerator 1 is provided on the front of the rotating door 20. Can be.

A first proximity sensing device 213 may be provided on one front side of the rotary door 20. The first proximity sensing device 213 is for detecting the user's proximity, and may be configured as a device capable of detecting that the user is located in front of the refrigerator 1, such as an ultrasonic or laser sensor.

In addition, a first operation unit 214 capable of manipulating the withdrawal of the drawer door 30 may be provided on one side of the rotary door 20. The first operation unit 214 may be disposed on one side of both right and left side surfaces of the rotary door 20. Therefore, the first manipulation unit 214 may not be exposed to the outside.

In addition, the first operation unit 214 is disposed inside the rotary door 20 and is configured with a touch sensor so that a user can input a manipulation by touching the surface of the rotary door 20. .

On the other hand, through the operation of the first operation unit 214, the drawer door 30 can be set to move in and out. For example, the drawer door 30 may be continuously and automatically performed withdrawal and elevation operations through a single operation. In addition, the drawer door 30 may be pulled in and out of the drawer door 30 according to a user's setting.

The set state of the draw-in/out operation of the drawer door 30 may be displayed through the display 211. In addition, when a touch operation of the display 211 is possible, an operation setting of the drawer door 30 through the display 211 may also be possible.

On the other hand, the input for the operation of the drawer door 30 can be made effective only when the user's proximity is detected by the first proximity sensing device 213. That is, when the user stands in front of the refrigerator with the intention of using the refrigerator 1, the first proximity sensing device 213 can detect the user. In this state, when the manipulation signal of the first manipulation unit 214 is input, the operation of the drawer door 30 can be performed. Therefore, it is possible to prevent the drawer door 30 from being pulled in and out due to misoperation.

Meanwhile, a second manipulation unit 301 may be provided on the drawer door 30. The second operation unit 301 may be provided on one side of the drawer door 30 located at the bottom of the drawer door 30, and the second operation unit 301 may be configured by a touch or button method. . Of course, if the upper drawer door 30 is also liftable, the second manipulation unit 301 may be provided on the front side of the upper drawer door 30.

In addition, the third operation unit 302 may be provided at the bottom of the lower drawer door 30 as shown in the drawing. The third manipulation unit 302 may be configured to irradiate an image on the floor surface to output a virtual switch and input manipulation in a manner that a user approaches the corresponding area. The drawer door 30 may be input and removed through the third manipulation unit 302.

Since the third operation unit 302 is provided in the lower door, it may interfere with a user when automatically pulling in and out of the lower door, and thus may be used when moving in and out of the lower drawer door 30. Of course, when the cabinet 10 is provided with a door opening device (not shown) for opening the rotating door 20, the third operating unit 302 is operated to operate the rotating door 20 to be opened. It will also be possible.

The drawer door 30 may be operated by automatic withdrawal and/or automatic elevation by at least one of the plurality of operation units 214, 301, and 302. Of course, only one of the plurality of operation units 214, 301, and 302 may be provided as necessary.

On the other hand, the operation units 214, 301 and 302 are composed of a plurality and can be used to move in and out of the drawer door 30, and the operation of the plurality of operation units 214, 301 and 302 can be used to move in and out according to a combination or sequential operation. It can be manipulated.

When the manipulation units 214, 301 and 302 are operated to store food stored in the lower drawer door 30, the drawer door 30 is pulled forward, and then the container inside the drawer door 30 36) can be elevated.

Meanwhile, the container 36 may have a predetermined height. Since the container 36 is seated on the lifting device 80 to be described later, when the lifting device 80 is elevated, the height of the container 36 may be added to the height of the lifting device 80. Therefore, when the lifting device 80 is raised, the user may be positioned at a very easy point to access the container 36 or to lift the container 36.

Therefore, the container 326 can be completely accommodated in the drawer part 32 when the drawer door 30 is drawn in and out, and in a position higher than the lower storage space 12 when the lifting device 80 is raised. It can be formed to be positioned.

On the other hand, the shape of the container 36 is not limited, but may be a shape corresponding to the size of the front space (see S1 in FIG. 3), even when the lifting device 80 is raised to have a predetermined height. It would be desirable to be configured so that the food stored therein does not deviate.

By such an operation, the food or container 36 inside the drawer door 30 disposed at the bottom can be more easily lifted and used.

The drawer door 30 is automatically drawn back and forth by a drawer motor 14 and a pinion 141 provided in the cabinet 10 and a drawer rack 34 provided on the lower surface of the drawer door 30. It may be. In addition, the container inside the drawer door 30 located at the lower portion may be lifted by the driving device 40 and the lifting device 80 provided in the drawer door 30.

Hereinafter will be described in more detail with respect to the configuration for the operation of the drawer door 30 and the drawer door 30 of the present invention, unless otherwise described, the drawer door 30 of the lower drawer door or Let's call it the door.

Meanwhile, the embodiment of the present invention is not limited to the number and shape of drawer doors, and may be applicable to all refrigerators equipped with drawer-type doors in a storage space at the bottom.

3 is a perspective view of the container of the lower drawer door is separated. And, Figure 4 is an exploded perspective view of the drawer portion and the door portion of the lower drawer door as viewed from the front.

1 to 4, the drawer door 30 is a door part 31 that opens and closes the storage space, and is coupled to the rear surface of the door part 31 to be drawn in and out together with the door part 31. It may include a drawer portion 32.

The door part 31 is exposed to the outside of the cabinet 10 to form the appearance of the refrigerator 1, and the drawer part 32 is disposed inside the cabinet 10 to form a storage space can do. Then, the door portion 31 and the drawer portion 32 are coupled to each other and can be drawn in and out together in the front-rear direction.

The drawer part 32 is always located on the rear surface of the door part 31, and may form a space in which food or containers for storage are stored. The inside of the drawer part 32 may form a storage space that is opened upward, and the exterior of the drawer part 32 may be formed by a plurality of plates (391,392,395 in FIG. 13 ).

The plurality of plates 391, 392, 395 may be made of a metal material such as stainless steel, and provided on the inside as well as the outside of the drawer part 32 so that the entire drawer part 32 has the same texture as stainless steel or stainless steel. Can be formed.

In the state in which the drawer door 30 is drawn, a machine room 3 equipped with a compressor and a condenser constituting a refrigeration cycle may be disposed behind the drawer door 30. Accordingly, the second half of the drawer part 32 may be formed in a shape in which the upper end protrudes more than the lower end, and the rear surface of the drawer part 32 may include an inclined surface 321.

And, on both sides of the drawer portion 32 may be provided with a drawer rail 33 that can guide the drawer in and out of the drawer door (30). The drawer door 30 can be mounted on the cabinet 10 to be retractable by the drawer rail 33. The draw-out rail 33 may be configured to be shielded by the outer side plate 391 and not exposed to the outside. The draw-out rail 33 may be configured as a rail structure that can be extended in multiple stages.

The drawer rail 33 is provided with a rail bracket 331, and the rail bracket 331 may extend from one side of the drawer rail 33 to both sides of the drawer part 32. And, the rail bracket 331 can be fixedly coupled to the high inner wall surface. Therefore, the drawer part 32, that is, the drawer door 30 by the drawer rail 33 may be mounted to the drawer 10 so as to be drawn in and out.

In addition, the draw-out rail 33 may be provided on both side lower ends of the drawer part 32. And, the lower end of both sides of the drawer part 32 is mounted in a form that is seated above the drawer rail 33, and thus, the drawer rail 33 may be referred to as the under rail. .

A drawer rack 34 may be provided on the lower surface of the drawer part 32. The draw-out rack 34 may be disposed on both sides, and is connected to the drive of the draw-out motor 14 mounted on the cabinet 10 to enable automatic draw-out of the drawer door 30. That is, when the operation of the operation units 22 and 301 is input, the draw-out motor 14 is driven so that the drawer door 30 can be drawn in and out according to the movement of the draw-out rack 34. In this case, the drawer door 30 can be stably drawn in and out by the drawer rail 33.

Meanwhile, the interior of the drawer part 32 may be divided into a front space S1 and a rear space S2. The front space S1 may include a lifting device 80 that is vertically elevated and a container 36 that is seated on the lifting device 80 and is elevated together with the lifting device 80.

The container 36 is shown in the form of a basket with an open top, but may have a hermetic box structure, such as a kimchi container, or may be stacked or arranged side by side.

In addition, when the drawer door 30 is withdrawn, the entire drawer 32 cannot be withdrawn out of the storage space due to a limitation in the drawer distance of the drawer door 30, and at least the front space S1. This is drawn out of the storage space and all or part of the rear space S2 is located inside the storage space inside the cabinet 10.

In such a structure, the drawer distance of the drawer door 30 may be limited by the drawer rack 34 or the drawer rail 33, and as the drawer distance increases, the drawer door 30 is drawn out. It is because the moment applied to the large is difficult to maintain a stable state and may cause deformation or damage of the withdrawal rail 33 or the withdrawal rack 34.

A lifting device 80 and a container 36 are accommodated in the interior of the front space S1, and the lifting device 80 is elevated in the vertical direction, and the food or container 36 seated on the lifting device 80 is mounted. ) Together. Further, the lifting device 80 may be provided below the container 36. Therefore, when the container 36 is mounted, the lifting device 80 may be covered by the container 36 and no configuration of the lifting device 80 is exposed to the outside.

A separate drawer cover 37 may be provided in the rear space S2. The front space S1 and the rear space S2 may be divided by the drawer cover 37. In the state where the drawer cover 37 is mounted, the front surface and the upper surface of the rear space S2 are shielded so that unused space is not exposed to the outside.

With the installation of the drawer cover 37, when the drawer door 30 is drawn out, the rear space S2 is covered, and only the front space S1 is exposed in the state where the drawer door 30 is pulled out. It becomes possible to provide an appearance. Then, the space except for the space where the lifting device 80 and the container 36 are mounted is covered to prevent problems such as food falling or objects getting stuck in the gap during the lifting.

However, when the drawer cover 37 is removed, it is possible to access the rear space S2 and food can be stored in the rear space S2. In order to utilize the rear space S2, a container corresponding to the shape of a separate pocket or rear space may be disposed in the rear space S2.

And, in order to utilize the entire space inside the drawer part 32, the lifting device 80 inside the drawer part 32 may be simply detachably mounted, and the lifting device 80 and the drawer cover 37 By separating, the entire interior space of the drawer part 32 may be utilized.

The outer surface of the inner and outer surfaces of the drawer part 32 may be formed by plates (see 391,392, 395 in FIG. 13), shielding the components mounted on the drawer part 32, thereby allowing external and internal appearances. You can make it look neat. The plates (see 391,392, 395 in FIG. 13) may be composed of a plurality, and may be formed of a stainless material to provide a more luxurious and clean appearance.

Meanwhile, the door part 31 and the drawer part 32 constituting the drawer door 30 may have a structure that can be separately coupled to each other. Assembly workability and serviceability can be improved through the separable structure of the door part 31 and the drawer part 32.

The rear surface of the door part 31 and the front surface of the drawer part 32 may be combined with each other, and power for lifting of the lifting device 80 when the door part 31 and the drawer part 32 are combined. It can be configured to provide.

The driving device for lifting of the lifting device 80 (see 40 in FIG. 6) may be disposed on the door part 31, and the door part 31 and the drawer part 32 may be selectively connected. .

In particular, the driving device (see 40 in FIG. 6) provided in the door part 31 may be configured with components operated by input of power and components for transmitting power to the lifting device 80. Accordingly, when the service of the driving device (see 40 in FIG. 6) is required, the door unit 31 can be removed and acted upon, and only the door unit 31 can be replaced to take action.

The door part 31 and the drawer part 32 may be combined by a pair of door frames 316 provided on both sides.

The door frame 316, a door engaging portion 316a extending in the vertical direction and coupled to the door portion 31, and a drawer engaging portion 316b extending rearward from the lower end of the door engaging portion 316a. It may include.

The door coupling portion 316a may be combined with the door portion 31 by a separate coupling member, or may be combined with one side of the door portion 31 by a simple coupling structure. In addition, the drawer coupling portion 316b may be disposed to be inserted into both sides of the drawer portion 32 so as to be adjacent to the draw-out rail 33. In addition, the drawer engaging portion 316b may be mounted to the drawer portion 32 in a state in which it is coupled to the drawer rail 33. It can be inserted and placed.

In the state in which the door engaging portion 316a is coupled to the door portion 31, the drawer engaging portion 316b may be inserted into the drawer portion 32 to support the drawer portion 32. In addition, the drawer coupling part 316b may be coupled by the drawer part 32 and a separate coupling member, or may be coupled by a structure that is molded to each other.

In addition, when the door unit 31 and the drawer unit 32 are coupled, the driving unit 40 and the elevator unit 80 may be connected to the front of the drawer unit 32 so that a part of the elevator unit 80 is connected. A drawer opening 35 to which is exposed may be formed.

On the other hand, the door portion 31 is formed to substantially open and close the storage space of the cabinet 10 and at the same time to form the front appearance of the refrigerator 1.

The door part 31 is provided with an outer case 311 forming a part of the front and circumferential surfaces, a door liner 314 forming a back surface, an upper deco 312 and a lower deco 313 forming upper and lower surfaces. By the appearance can be formed. In addition, a heat insulating material (not shown) may be filled in the door part 31 between the out case 311 and the door liner 314.

Hereinafter, the door part 31 constituting the drawer door 30 and the driving device 40 provided in the door part 31 will be described in more detail with reference to the drawings.

5 is a rear view of the door unit. And, Figure 6 is a rear view of the door cover with the door portion removed. In addition, FIG. 7 is a perspective view of the driving device in a state where the driving device and the lifting device are connected. And, Figure 8 is a front perspective view of the driving device. And, Figure 9 is a front perspective view showing the internal structure of the driving device. And, Figure 10 is a partially enlarged view showing a structure in which power is transmitted to the screw of the driving device.

Referring to FIGS. 4 to 10, the door part 31 is formed with a front surface by the out plate 311 and a back surface may be formed by the door liner 314.

In addition, a driving device 40 for the operation of the lifting device 80 may be provided inside the door part 31. The driving device 40 is disposed inside the door part 31, but is not embedded in the interior of the heat insulating material, but is provided inside the space formed by the door liner 314, and the door cover 315. It can be configured to be shielded by and not exposed to the outside.

In detail, an insulating material may be filled between the out plate 311 and the door liner 314 to insulate the interior of the storage space 12.

In addition, a door depression recessed inward may be formed in the door liner 314. The door recess may be formed in a shape corresponding to the shape of the driving device 40 and may be recessed inside the drawer door 30. In addition, the door recessed portion may be recessed such that the electric components including the door light 318 for illuminating the interior are further mounted.

The door light 318 is formed in a horizontal direction from left to right on the rear side of the drawer door 30, and is located at the top of the inner region of the gasket 317 formed along the back circumference of the drawer door 30. Can be.

The door light 318 is configured such that a plurality of LEDs and light irradiated from the LEDs are directed toward the inside of the drawer door 30, particularly toward the inside of the drawer part 32, and the drawer door 30 is drawn out. In the open state, the inside of the drawer part 32 is illuminated.

The door cover 315 is for forming a rear appearance of the door part 31 and shields the driving device 40 mounted on the door part 31. The door cover 315 may be formed in a plate shape, and may shield the driving device 40 from being exposed while the driving device 40 is mounted.

The door cover 315 may be formed with a cover recess in a corresponding position to cover the driving device 40 from the rear. The cover recess may be formed such that a front surface of the door cover 315, that is, a surface facing the driving device 40 is recessed, and a rear surface of the door cover 315, that is, a surface facing the inside of the storage space, protrudes. .

In addition, the side cutouts 315a may be formed at both left and right ends of the door cover 315. The side incision 315a may provide a space for the door frame 316 to be coupled to the door.

Meanwhile, cover openings 315b may be formed at both lower ends of the door cover 315. In the cover opening 315b, the receiving portion 421a of the lever 42, which is one component of the driving device 40, is exposed, and access to the receiving portion 421a through the cover opening 315b is exposed. It becomes possible. In addition, the cover opening 315b may be located at a position facing the drawer opening 35.

Therefore, when the door portion 31 and the drawer portion 32 are combined, the cover opening 315b and the drawer opening (35 in FIG. 13) can communicate with each other, and thus, the cover opening 315b. The receiving portion 421a and the engaging portion 842c of the lifting device 80 may be coupled through the drawer opening 35. That is, the driving device 40 and the lifting device 80 are connected to each other, and according to the operation of the driving device 40, the lifting device 80 may be in a state that can be elevated. In addition, in the state in which the door part 31 and the drawer part 32 are coupled, it may be possible to separate only the lifting device 80 through separation of the receiving part 421a and the engaging part 842c.

On the other hand, in the lower center of the door cover 315, a cable hole 315c through which a cable connected to electric components such as a driving device 40 and a door light 318 provided in the door part 31 enter and exit is further provided. Can be formed. The wires entering and exiting through the cable hole 315c may be connected to the cabinet 10 through the lower portion of the drawer part 32.

A door gasket 317 may be provided along the circumference of the rear surface of the door part 31, and in the state in which the drawer door 30 is closed, the door gasket 317 is in contact with the front surface of the cabinet 10 to be sealed. Can be.

Meanwhile, the driving device 40 may be shielded by the door cover 315 and disposed inside the door part 31. The power of the driving device 40 may be transmitted to the lifting device 80. At this time, the driving device 40 simultaneously transmits power to both the left and right sides of the lifting device 80, so that the lifting device 80 does not incline or skew to one side under any circumstances, and the left and right sides move up and down in a horizontal state. It can be done.

Hereinafter, the configuration of the driving device 40 will be described in detail.

The driving device 40 is connected to the motor assembly 60, a pair of screw units 50 and 50a disposed on both sides of the motor assembly 60, and each of the screw units 50 and 50a. It may include a pair of levers (42).

In detail, the motor assembly 60 may be located in the center portion in the left-right direction of the door portion 31. In addition, the operation of the screw units 50 and 50a and the lever 42 on both sides may be configured to be performed by driving the motor assembly 60 including one lifting motor 64.

In particular, the motor assembly 60 may adjust the magnitude of the deceleration and transmission force through a combination of multiple gears.

In addition, the motor assembly 60 has a structure in which the elevating motor 64 and the gears are vertically disposed in order to minimize a recessed space when mounted on the door part 31, in particular, the motor assembly 60 It can be formed to widen the width in the left and right directions so as to minimize the thickness of the and minimize the thickness in the front-rear direction.

In addition, the elevating motor 64 constituting the motor assembly 60 may protrude toward the drawer part 32 to minimize the depression depth of the door part 31 to ensure insulation performance.

The elevating motor 64 provides power for elevating the elevating device 80, and may be configured to be capable of forward and reverse rotation. Therefore, when the lifting signal of the lifting device 80 is input, it is rotated forward and backward to provide power for lifting of the lifting device 80. In addition, when a stop signal is input by sensing of a load or a sensor of the elevating motor 64, it may be stopped.

The motor assembly 60 includes a motor case 61 in which the elevating motor 64 is installed, and a motor cover 62 coupled to the motor case 61 and covering the elevating motor 64. Can be.

The axis of rotation of the elevating motor 64 may protrude from the motor case 61 toward the opposite side of the motor cover 62. In addition, the motor assembly 60 may further include a power transmission unit for transmitting power of the elevating motor 64. The power transmission unit may be located on the opposite side of the elevating motor 64 based on the motor case 61.

Further, the power transmission unit may be formed of a combination of a plurality of gears, and may be shielded by a cover member 66 mounted on the opposite side of the elevating motor 64.

The power transmission unit may include a drive gear 651 connected to the shaft of the elevating motor 64 passing through the motor case 61. The power transmission unit may further include a first transmission gear 652 engaged with the driving gear 651 on the lower side of the driving gear 651.

The first transmission gear 652 may be, for example, a multi-stage gear. For example, the first transmission gear 652 may include a first gear 652a engaged with the drive gear 651 and a second gear 652b having a diameter smaller than the diameter of the first gear 652a. It can contain. Each of the first gear 652a and the second gear 652b may be a spur gear.

The power transmission unit may further include a second transmission gear 653 engaged with the first transmission gear 652. The second transmission gear 653 may engage the first transmission gear 652 under the first transmission gear 652. The second transmission gear 653 has a first gear 653a meshing with the second gear 652a of the first transmission gear 652 and a first diameter having a larger diameter than the first gear 653a. It may include two gears 653b.

Each of the first gear 653a and the second gear 653b of the second transmission gear 653 may be spur gears. In addition, the second gear 653b of the second transmission gear 653 may be positioned below the first gear 652a of the first transmission gear 652. Therefore, it is possible to prevent the front and rear widths of the driving device 60 from being increased by the first transmission gear 652 and the second transmission gear 653.

The power transmission unit may further include a third transmission gear 654 engaged with the second transmission gear 653. The third transmission gear 654 may engage the second gear 653b below the second gear 653b of the second transmission gear 653. The third transmission gear 654 may be a spur gear. A part of the third transmission gear 654 may be disposed to overlap the second transmission gear 653 in the front-rear direction.

The motor case 61 may be provided with a gear shaft rotatably supporting the plurality of transmission gears.

The power transmission unit may include a pair of crossed gears 655 and 656 engaged with the third transmission gear 654. The pair of crossed gears 655 and 656 are spaced apart in the left-right direction, and can be engaged with the third transmission gear 654 at a position where the rotation center is lower than the rotation center of the third transmission gear 654. have.

Each of the crossed gears 655 and 656 is engaged with the third transmission gear 654 so that each of the crossed gears 655 and 656 has a spur gear type 655a and 656a and a helical gear type. It may include the first helical gear portion (655b, 656b).

In addition, the centers of rotation of the crossing gears 655 and 656 spaced apart on both sides of the left and right sides may extend horizontally to each other.

The power transmission unit may further include a pair of second helical gear portions 657 and 657a engaged with each of the cross gears 655 and 656.

The second helical gear portions 657 and 657a may engage the first helical gear portions 655b and 656b. The rotation center lines of the second helical gear portions 657 and 657a may be arranged to intersect the rotation center lines of the cross gears 655 and 656. Accordingly, the first helical gear portions 655b and 656b and the second helical gear portions 657 and 657a are coupled to each other in an intersecting state, and may be configured to transmit rotation in engagement with each other.

The rotation center lines of the cross gears 655 and 656 extend in the front-rear direction, and the rotation center lines of the second helical gear portions 657 and 657a may extend in the vertical direction. Further, the rotation center lines of the second helical gear portions 657 and 657a disposed on both sides of the left and right sides may be inclined in a direction away from each other toward the upper side.

As such, by using a pair of crossed helical gears, there is an advantage in that the structure for power transmission is compact while the power transmission direction can be easily switched. In particular, even when a large force is transmitted to elevate the elevating device 80, noise is not significantly generated.

The pair of screw units 50 and 50a may be disposed on both left and right sides of the motor assembly 60.

The pair of screw units (50, 50a) are disposed on both left and right sides inside the door part (31), and the pair of screw units (50, 50a) differ only in their mounting positions, and their structure and shape. Is the same.

Power of the elevating motor 64 may be transmitted from the lower portions of the screw units 50 and 50a.

The screw units 50 and 50a on both sides may be formed to be symmetrical with respect to the motor assembly 60. Accordingly, the motor assembly 60 may be disposed between the screw units 50 and 50a located on both sides, and the distance between the screw units 50 and 50a disposed on both sides toward the bottom from the top may be increased. Can be arranged to get closer and closer.

The screw units 50 and 50a may include screws 52 and 52a that are rotated by receiving the power of the elevating motor 64. The screws 52 and 52a extend in the vertical direction, but the upper side may be inclined to the outside and the lower side to the outside.

The screws 52 and 52a may be connected to the second helical gear portions 657 and 657a. That is, the screws 52 and 52a may be rotated together when the second helical gear portions 657 and 657a are rotated. For example, an insertion portion may be formed in the second helical gear portions 657 and 657a, and an accommodation groove in which the insertion portion is accommodated may be formed in the screw 52.

Accordingly, the screws 52 and 52a are also disposed to be symmetrical on both sides of the motor assembly 60 on the left and right sides, and may be disposed obliquely on the same centerline as the centerlines of the second helical gear portions 657 and 657a. . Therefore, the screws 52 and 52a on both sides of the left and right sides have an arrangement that is further away from each other.

The screw units 50 and 50a may further include screw holders 56 and 56a through which the screws 52 and 52a are coupled.

The screw holders 56 and 56a may be moved in the vertical direction along the screws 52 and 52a when the screws 52 and 52a are rotated. Further, the lever 42 may be coupled to the screw holders 56 and 56a. When the screw holders 56 and 56a are moved, the lever 42 may be rotated.

In detail, a holder through-hole 561 is formed at the center of the screw holders 56 and 56a. The holder through-hole 561 is formed to penetrate the screw holders 56 and 56a, and the screws 52 and 52a are inserted and mounted to pass through the holder through-hole 561. A screw thread coupled to the screw may be formed on the inner surface of the holder through hole 561. Accordingly, when the screws 52 and 52a are rotated, the screw holders 56 and 56a are movable along the screws 52 and 52a.

In addition, guide holes 562 are formed at both left and right sides of the holder through portion 561. The guide hole 562 is a portion through which the guide bars 53 and 54 will be described below, and the screw holders 56 and 56a may be moved along the guide bars 53 and 54. At this time, a bearing or other configuration for reducing friction may be disposed on the inner surface of the guide hole 562 to facilitate the movement of the screw holders 56 and 56a.

Since the pair of guide bars 53 and 54 are configured to pass through the guide hole 562, the screw holders 56 and 56a do not flow left and right, and thus stable movement is possible. In particular, stable lifting is possible even in a situation in which a heavy load is applied to drive the lifting device 80, and noise is not generated.

In addition, a magnet 563 may be provided in the screw holder 56a. For example, a magnet mounting groove 563a into which a magnet is pressed may be formed in the screw holder 56a, and the magnet 563 may be inserted into the magnet mounting groove 563a.

The magnet 563 is for detecting the position of the screw holder 56a, and when the screw holder 56a is positioned at the bottom or top of the screws 52 and 52a, the lifting detection device will be described below. 55 is able to detect this. That is, it is possible to determine whether the lifting device is completed and lowered, based on whether the magnet 563 mounted on the screw holder 56a is detected.

In addition, although not shown in detail, the opposite side of the rear surface of the screw holder 56a provided with the magnet 563, that is, the holder connector 564 is mounted on the front surface of the screw holder.

The holder connector 564 is for connecting the lever 42 and the screw holders 56 and 56a, and may be fixedly mounted to the screw holders 56 and 56a. That is, the holder connector 564 may be coupled to the screw holders 56 and 56a while passing through the lever 42. To prevent the holder connector 564 from interfering with the rotation of the lever 42, the lever 42 may include a rectangular slot 426.

Since the screw units 50 and 50a are arranged on both sides of the left and right sides, the extension lines of the screws 52 and 52a on both sides of the left and right sides may intersect at the outside of the driving device 40.

The lever 42 connects the screw holders 56 and 56a and the lifting device 80, and both ends may be coupled to the screw holders 56 and 56a and the lifting device 70, respectively.

The screw units 50 and 50a may further include a housing 51 accommodating the screws 52 and 52a.

The housing 51 forms an outer shape of the screw units 50 and 50a, and forms a space in which the screws 52 and 52a and the screw holders 56 and 56a can be accommodated. The portion can be shielded by a cover member 66 to be described later.

The housing 51 may be formed of a bent metal material or a plastic material.

The housing 51 may include a first accommodating part 511 accommodating the screws 52 and 52a and a second accommodating part 512 accommodating the second helical gear parts 657 and 657a. have.

The first accommodating portion 511 and the second accommodating portion 512 may be partitioned by a partition wall 513. The second accommodating part 512 is located below the first accommodating part 511.

A portion of the crossing gears 655 and 656 may be accommodated in the second receiving part 512. That is, the cross gears 655 and 656 and the second helical gear parts 657 and 657a may be connected in the second receiving part 512.

The second side of the screws 52 and 52a penetrates the partition wall 513, and the second helical gear portions 657 and 657a are coupled to the screws 52 and 52a passing through the partition wall 513. do.

The housing 51 may be provided with one or more guide bars 53 and 54 for guiding the rise of the screw holders 56 and 56a. The one or more guide bars 53 and 54 extend in parallel with the screws 52 and 52a while being spaced apart from the screws 52 and 52a.

A plurality of guide bars 53 and 54 are provided in the housing 51 so that the screw holders 56 and 56a do not incline to either side of the screw 52 and 52a, and the plurality of guides The screw 52 may be located between the bars 53 and 54.

The motor case 61 and the pair of housings 51 may be integrally formed. In addition, a single cover member 66 may cover the motor case 61 and the pair of housings 51.

That is, the cover member 66 is fastened to the motor case 61 to cover the power transmission portion, fastened to the pair of housing 51, the screws (52, 52a), guide bar (53, 54), it is possible to cover the screw holder (56,56a).

Of course, if necessary, the cover member 66 may be composed of a plurality of parts respectively shielding the power transmission unit and the screw units 50 and 50a to be configured to open and close each of them independently.

According to the present embodiment, since the driving device 40 exists as a single module, the driving device 40 becomes compact, and the driving device 40 can be easily installed in the door part 31.

In addition, since a single cover member 66 covers the motor case 61 and a pair of housings 51 together, it is easy to remove the cover member 66 from the power transmission unit or the housing 51 easily. It has the advantage of being accessible and easy to service.

On the other hand, the lifting unit 55 may be provided on the screw unit 50a on one side of the screw units 50 and 50a on both sides. Since the screw units 50a on both sides of the left and right sides operate simultaneously by one motor assembly 60, even if the lift detection device 55 is provided only on the screw unit 50a on one side, the operation of the lift unit 80 is effectively performed. Can be detected. Accordingly, the lifting detection device 55 may be provided on either of the left and right sides of the screw units 50 and 50a.

The elevating detection device 55 is for determining whether the elevating device 80 is completed, and determines whether or not the elevating device 80 is completed based on the operation of the driving device 40.

The lifting detection device 55 may be mounted on the cover member 66 and may be disposed up and down along the screw unit 50a.

The lift detection device 55 may include a support plate 551, detection sensors 552 and 553 mounted on the support plate 551, and a case 554 accommodating the support plate 551. .

The support plate 551 is formed in a plate shape, and is configured to be mounted on both sides of a pair of detection sensors 552,553. The support plate 551 may be simply formed of a plate-like material in which the sensing sensors 552 and 553 can be fixedly mounted at the sensing position. In addition, the support plate 551 may be a substrate on which the detection sensors 552 and 553 are mounted.

As the sensing sensors 552 and 553, a sensor that senses the magnet 563 may be used. The sensing sensor may be a hall sensor that senses the position of the magnet. Of course, other sensors or devices for sensing the magnet 563 may be provided in place of the hall sensor, if necessary.

In addition, other structures or devices capable of sensing a specific position of the screw holder 56a may be used instead of the magnet 563 and the hall sensor.

One of the sensing sensors 552 and 553 is mounted at a position corresponding to the position of the magnet 563 when the lifting device 80 is raised, and the magnet 563 when the lifting device 80 is completed falling. ) And the other may be mounted at a position corresponding to the position. Accordingly, when any one of the pair of sensing sensors 552 and 553 recognizes the magnet, the lifting device 80 determines that the lifting or lowering is completed.

The support plates 551 on which the detection sensors 552 and 553 are mounted may be accommodated in the case 554. The case 554 may be a part of the cover member 66. The case 554 may be recessed in the inner surface of the cover member 66 and may provide a space in which the support plate 551 is accommodated. Of course, the case 554 may be configured separately and have a structure mounted on the cover member 66.

The case 554 forms a space accommodating the support plate 551. In addition, a connector 555 may be provided on the support plate 551. The connector 555 is configured such that wires extending from the pair of detection sensors 552 and 553 are connected, and the wires 555a are connected from the outside. That is, it is possible to connect the electric wires by the connector 555 coupling method from the outside without having to separate the support plate 551 or the detection sensors 552,553.

When the support plate 551 is a board on which the detection sensors 552 and 553 are mounted, the connector 555 may be disposed on the support plate 551 corresponding to the connector mounting portion 951.

11 is a perspective view of the drawer unit. And, Figure 12 is an exploded perspective view of the drawer.

3, 11 and 12, the drawer part 32 is provided inside the drawer body 38 forming the overall shape of the drawer part 32 and the drawer body 38. It may include a plurality of plates (391,392,395) forming the inner appearance of the lifting device 80 and the drawer portion 32 for lifting the container and food.

In detail, the drawer body 38 may be injection-molded from a plastic material, forming an overall shape of the drawer part 32. The drawer body 38 is a basket shape with an open top surface to form a storage space for food therein. The rear surface of the drawer body 38 may be an inclined surface 321, so that interference with the machine room 3 may not occur.

The door frame 316 may be mounted on both sides of the drawer part 32. The door frame 316 may be coupled to the frame mounting portions 383 on both sides of the lower surface of the drawer portion 32 or the lower left and right sides, and in the state in which the door frame 316 is coupled to the drawer portion 32. The drawer part 32 and the door part 31 may be integrally coupled to be drawn in and out together.

The door frame 316 and the drawer portion 32 may be coupled to each other by a coupling structure by a separate coupling member or a mating structure between the door frame 316 and the drawer portion 32.

A drawer rack 34 may be provided on both left and right sides of the drawer 32. The drawer part 32 may be drawn in and out in the front-rear direction by the draw-in rack 34. In detail, at least part of the drawer part 32 is located inside the storage space in a state mounted on the cabinet 10. In addition, the draw-out rack 34 may be combined with a pinion gear 141 provided on the bottom surface of the storage space. Therefore, the pinion gear 141 may rotate when the draw-in motor 14 is driven, so that the draw-in rack 34 may be moved, and the drawer door 30 may be drawn in and out.

Rail mounts 382 on which the drawer rails 33 for guiding the drawers of the drawer body 38 are mounted may be formed under both side surfaces of the drawer body 38. The rail mounting portion 382 extends from the front end to the rear end, and a space may be formed to accommodate the draw-out rail 33 therein.

The draw-out rail 33 is a rail extending in multiple stages, one end of which can be fixed to the storage space inside the cabinet 10, and the other end of the drawer door 30 is fixed to the rail mounting portion 382. It is possible to make the withdrawal and withdrawal more stable.

Meanwhile, magnets 380 may be provided on one side of both side surfaces of the drawer body 38. In addition, a draw sensor 151 may be provided at a position corresponding to the position of the magnet 380 while the drawer door 30 is fully drawn. Therefore, the draw-in detection device 151 detects the magnet 380 in a state where the drawer door 30 is fully drawn to determine the completion of the draw-in of the drawer door 30. In addition, when the complete draw-in of the drawer door 30 is sensed, the draw-out motor 14 may be stopped. The intake detection device 151 may have a structure such as a switch, and various structures capable of detecting the intake of the drawer door 30 will be possible.

In addition, the drawer body 38 may be provided with a plurality of plates 391, 392, 395 formed of a plate-like metal material such as stainless steel to form at least a part of the inner and outer parts of the drawer body 38.

In detail, outer side plates 391 may be provided on both left and right sides of the outer side of the drawer body 38. The outer side plate 391 is mounted on both sides of the left and right sides of the drawer body 38 to form the appearance of both sides, and in particular, the door frame 316 and the draw-out rail (mounted on both sides of the drawer body 38) 33) It is possible to prevent such components from being exposed to the outside.

A plurality of reinforcing ribs 384 may be formed on both sides of the outer surface of the drawer body 38 to intersect in the horizontal and vertical directions. The reinforcing rib 384 increases the strength of the drawer body 38 itself, so that the drawer body 38 is more visible with respect to the increased weight of the door due to the provision of the driving device 40 and the lifting device 80. It can be made to maintain its shape firmly.

And, the reinforcing ribs 384 can support the outer side plates 391 mounted on both sides, so that the appearance of the drawer portion 32 can be maintained firmly.

Inner side plates 392 may be provided on both left and right sides of the inner side of the drawer body 38. The inner side plate 392 is mounted on both left and right sides of the drawer body 38, and may form both sides of the inner side.

The inner plate 395 may include a front portion 395a, a bottom portion 395b, and a rear portion 395c having sizes and shapes corresponding to the inner front, bottom, and rear surfaces of the drawer body 38.

The inner side plate 392 and the inner plate 395 may form the entire inner surface of the drawer body 38, and the inner side of the drawer body 38 may provide a metal texture.

Therefore, the storage space inside the drawer part 32 may have a metal texture as a whole, and not only can food stored therein be stored cold in a more even area as a whole, but also provide excellent cooling performance and storage performance to the user visually. Can provide

The drawer cover 37 is bent at the upper end of the cover front part 371 and the cover front part 371 that divides the inside of the drawer body 38 into a front space S1 and a rear space S2, It may include a cover upper surface portion 372 to shield the upper surface of the rear space (S2).

That is, when the drawer cover 37 is mounted, only the front space S1 in which the lifting device 80 is disposed can be exposed inside the drawer body 38, and the rear space S2 is the drawer. It can be shielded by the cover 37.

Meanwhile, a lifting device 80 may be provided inside the drawer body 38. The elevating device 80 is connected to the driving device 40 and has a structure capable of elevating up and down, and both left and right sides can be uniformly elevated.

In order to combine the lifting device 80 and the driving device 40, a drawer opening 35 is formed in the lower front of the drawer part 32.

On the other hand, the lifting device 80 is composed of a Caesars type is in a folded state in a lowered state, it is unfolded in an elevated state so that the container or food that is seated on the upper surface can be elevated.

In addition, the lifting device 80 may include a support plate 81, and the support plate 81 may provide a seating surface of the container 36 or a surface on which food is seated.

On the other hand, the height of the drawer opening 35 may be located at a lower position than the upper surface of the lifting device 80, that is, the upper surface of the support plate 81. Therefore, in the state in which the lifting device 80 is mounted, it is possible to prevent the drawer opening 35 from being visible inside the drawer part 32 in any state.

In addition, the support plate 81 has a size and shape corresponding to the front space to prevent foreign matter from penetrating into the lifting device 80 provided below the front space S1, and the lifting device 80 By blocking access to ), it is possible to fundamentally prevent safety accidents.

13 is a perspective view of a lifting device according to an embodiment of the present invention. And, Figure 14 is a view showing a state in which the upper frame of the lifting device. And, Figure 15 is a view showing a state in which the lever of the present invention is connected to the lifting device.

13 to 15, the lifting device 80 may be provided on the bottom of the inner surface of the drawer part 32, and may be detachably provided inside the drawer part 32.

In addition, the lifting device 80 may include an upper frame 82 and a lower frame 83 and a scissor assembly 84 disposed between the upper frame 82 and the lower frame 83.

In detail, the upper frame 82 is formed in a rectangular frame shape corresponding to the size of the inner front space S1 of the drawer part 32, and the support plate 81 can be mounted on the upper surface.

The upper frame 82 is moved in the vertical direction of the lifting device 80 and substantially supports the food or container 36 together with the support plate 81.

The upper frame 82 generally includes a frame portion 821 forming a circumferential shape of the upper frame 82, and a partition portion 822 that divides the space inside the frame portion 821 on both sides. Can be.

Since the frame portion 821 and the partition portion 822 are configured to form an outer frame and support the support plate 81, high strength is required, so the frame portion 821 and the partition portion 822 are metal It may be formed of a material, and may be formed in a shape in which both ends are bent in order to increase strength and prevent deformation.

Further, a slide guide 824 may be formed on a lower surface of the frame portion 821 to accommodate an end of the scissor assembly 84 and guide movement of the scissor assembly 84.

Caesars assemblies 84 may be disposed in the spaces 823 and 824 on both sides based on the partition 822, respectively.

The slide guide 824 may define a long hole 824a through which the scissor assembly 84 can penetrate. Thus, the scissor assembly 84 can be moved along the slide guide 824.

The lower frame 83 may have a structure that is the same as or similar to that of the upper frame 82 but only differs in direction from the upper frame 82.

The lower frame 83 may include a frame portion and a partition portion. In addition, a slide guide 834 may be formed on the upper surface of the lower frame 83 to accommodate the end of the scissor assembly 84 and guide the movement of the scissor assembly 84.

The slide guide 834 may define a long hole 834a through which the scissor assembly 84 can penetrate. Thus, the scissor assembly 84 can be moved along the slide guide 834.

The scissor assembly 84 may be provided on both left and right sides, and the scissor assembly 84 on both sides may operate by receiving power from one of the elevating motors 64, and thus may be elevated by the same height.

Therefore, even when supporting a heavy load can be effectively lifted by a pair of the scissor assembly 84 that is independently applied to both sides, wherein the scissor assembly 84 is the upper frame 82, that is, The support plate 81 may be elevated in a horizontal state.

The scissor assembly 84 may include a first scissor frame 841 in the form of a square frame, and a second scissor frame 845 in the form of a square frame rotatably connected to the first scissor frame 841. have.

The left and right widths of the second Caesars frame 845 may be formed to be smaller than the left and right widths of the first Caesars frame 841. Accordingly, the second scissor frame 845 may be connected to the first scissor frame 841 in a state located within an area formed by the first scissor frame 841.

The first scissor frame 841 may include a lower shaft (841a in FIG. 24) and an upper shaft (841b in FIG. 24) extending in the horizontal direction.

The lower shaft (841a in FIG. 24) is rotatably supported by the lower frame 83, and the upper shaft (841b in FIG. 24) is disposed to penetrate the sliding guide 824 of the upper frame 82. .

The first scissor frame 841 may be connected to a first rod (852a in FIG. 24) extending in the vertical direction and an upper shaft (841b in FIG. 24).

The second scissor frame 845 includes a lower shaft 851a and an upper shaft (not shown) extending in a horizontal direction, and a first rod 852a and a second rod 852b extending in the vertical direction. Can be.

The first rod 842a of the first Caesars frame 84 has an extension portion 842b protruding to be connected to the lever 42 and a coupling portion 842c provided at an end portion of the extension portion 842b. It may include.

The lever 42 may include a receiving portion 421a accommodating the engaging portion 842c for coupling with the engaging portion 842c.

An end portion of the coupling portion 842c may be formed in a non-circular shape. Therefore, when the lever 42 is rotated while the engaging portion 842c is accommodated in the receiving portion 421a, the lever 42 can be prevented from being idle with the engaging portion 842a. .

The engaging portion 842a and the extending portion 842b may penetrate the drawer opening 35, and the extending portion 842b may be located on the drawer opening 35. Therefore, the lifting device 80 inside the drawer part 32 may be connected to the driving device 40 outside the drawer part 32 by the extension part 842b and the coupling part 842a.

Hereinafter, the drawer door 30 of the refrigerator 1 according to an embodiment of the present invention having the above structure will be described in more detail with reference to the drawings with reference to the drawings.

16 is a block diagram schematically showing a connection between a control unit and components connected to the control unit according to an embodiment of the present invention. And, Figure 17 is a flow chart showing the operation of the draw-in and out of the drawer door. In addition, FIGS. 18 to 26 are views showing a state of the drawer door with respect to the drawer door withdrawal and lift operation.

Referring to these drawings, the refrigerator 1 maintains a state in which both the rotary door 20 and the drawer door 30 are closed as illustrated in FIG. 18 in a state of storing food. In this state, the user can draw in and out the drawer door 30 to receive food.

A plurality of drawer doors 30 may be provided above and below. The drawer door 30 provided at the lower portion of the drawer door 30 may be disposed to be adjacent to the upper drawer door 30 without a separate handle for drawing in and out. That is, a gap is hardly seen between the upper drawer door 30 and the lower drawer door 30, so that the front appearance of the refrigerator 1 can be seen very neatly and luxuriously.

In order to draw in and out of the drawer door 30 at the bottom, a user can input and withdraw an operation of the drawer door by operating the operation unit.

At this time, the user is able to input the operation of the drawer door 30 through the manipulation of the plurality of operation units 214,301,302. At this time, when the manipulation units 214, 301, and 302 are operated, the proximity sensing device 213 recognizes the user's proximity.

Therefore, it is determined that a valid operation input is performed only when any one of the manipulation units 214, 301, and 302 is performed in the state where the user's proximity is recognized by the proximity sensing device 213, and the drawer door 30 is started to be withdrawn. Can be.

For example, when the user stands in front of the refrigerator 1 and operates the first operation unit 214, the proximity detection device 213 generates a signal for detecting the user's proximity, and the first operation unit 214, a user's manipulation signal is generated. Therefore, the control unit 90 may finally determine that the operation input is effective for the operation of the drawer door 30, so that the withdrawal of the drawer door 30 can be started.

If the user's proximity is not detected by the proximity sensing device 213 or if any one of the manipulation units 214, 301 and 302 is not input, the drawer door 30 is not opened. [S110: Operation input step]

When it is determined that the operation input is valid in the operation input step, the control unit 90 for controlling the overall operation of the refrigerator 1 operates the draw-out motor 14 so that the operation of the draw-out motor 14 starts. Control.

When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled forward. The drawer door 30 may be withdrawn as the drawer rail 33 is extended.

The drawer rack 34 provided on the bottom surface of the drawer door 30 may be combined with a pinion gear 141 that rotates when the drawer motor 14 provided in the cabinet 10 is driven. The drawer door 30 is drawn in and out according to the driving of the drawing-in and out motor 14.

The drawer door 30 may be withdrawn until it is in a state as shown in FIGS. 19 and 20. At this time, the draw-in/out distance of the drawer door 30 may be a distance at least in which the front space S1 inside the drawer part 32 is completely exposed to the outside. Therefore, as shown in FIGS. 19 and 20, when the drawer door 30 is completely withdrawn, the doors 20, 30 or the cabinet in which the container or food is disposed upward when the lifting device 80 is elevated. It will not interfere with (10).

Looking more closely at the state in which the drawer door 30 is withdrawn, in the state in which the drawer door 30 is withdrawn for elevation, the front space S1 is completely drawn out of the lower storage space 12. State.

In particular, the rear end (L1) of the front space (S1) should be in a more withdrawn state than the front end (L2) of the cabinet (10) or the upper door (20), the interference of the lifting device 80 when lifting In order to prevent it, at least the cabinet 10 or the upper door 20 should be positioned more forward than the front end L2.

In addition, as shown in FIG. 20, the drawer door 30 may not be completely drawn out of the drawer part 32, but may be drawn out only to a position to avoid interference when the lifting device 80 moves up and down. At this time, at least a portion of the rear space S2 of the drawer part 32 is located inside the lower storage space 12. That is, the rear end L3 of the drawer part 32 is located at least inside the lower storage space 12.

Therefore, in addition to the weight of the drawer door 30 itself including the driving device 40 and the lifting device 80 and the weight of the storage, the drawer rail 33 or the drawer door 30 itself It is possible to guarantee a stable withdrawal and elevating operation without sagging or damaging.

The draw-out distance of the drawer door 30 may be determined by the draw-out detecting device 152 disposed in the cabinet 10 and/or the drawer door 30. The withdrawal detection device 152 and the incoming detection device 151 may be collectively referred to as withdrawal detection devices 151 and 152.

The drawer detecting device 152 is on one side of the drawer part 32 such as the drawer rack 34 or the drawer rail 33 so that the drawer door 30 can sense the fully withdrawn state. It may be configured as a sensing sensor for sensing the magnet 389 is provided.

For example, as illustrated, a magnet 389 may be provided at the bottom of the drawer part 32 and the withdrawal sensing device 152 may be provided at the bottom surface of the cabinet 10. The drawer detecting device 152 may be provided at a position corresponding to the position of the magnet 389 in a state where the drawer door 30 is completely withdrawn. Therefore, the withdrawal state of the drawer door 30 may be determined by the withdrawal detecting device 152.

If necessary, a switch is provided at a position where the drawer door 30 is completely drawn in and a position where it is drawn out to detect the draw-in/out of the drawer door 30, counting the number of revolutions of the draw-out motor 14 or In addition, a sensor for measuring a distance between the rear surface of the door part 31 and the front end of the cabinet 10 or counting the draw-in time of the drawer door 30 may detect the draw-in/out of the drawer door 30.

When the drawer detecting device 152 detects that the drawer door 30 has been withdrawn to a predetermined distance, the control unit 90 may determine that the drawer door 30 is withdrawn, and the drawer door In order to complete the withdrawal of 30, the driving of the withdrawal motor 14 is stopped. [S120: Drawer door withdrawal step]

At this time, in the state in which the drawer door 30 is pulled out, the draw-out motor 14 may be in a braked state such that it is no longer rotated. That is, while the lifting device 80 inside the drawer door 30 is operating, the drawer door 30 must maintain a withdrawn state. To this end, the withdrawal motor 14 may be a motor equipped with a brake capable of restraining an optional motor (commonly referred to as a braking motor or a brake motor).

For example, if the drawer door 30 flows or closes while the lifting device 80 is being driven, there is a possibility of a safety accident. In addition, if the drawer door 30 flows or closes during the operation of the lifting device 80, a problem of falling or damage of food being stored may occur, and a structure for lifting or the refrigerator itself may be damaged. have. Therefore, the drawer door 30 should be able to maintain a fixed state in which no further withdrawal is possible even if an external force is applied to the drawer door 30 while at least the operation of the lifting device 80 is performed.

The take-out motor 14 may be prevented from rotating even when an external force is applied by its own breaking structure. Of course, if necessary, the drawer door 30 itself may be constrained to maintain the drawer door 30 withdrawn. [S130: Door withdrawal restraint step]

On the other hand, until the drawer door 30 is fully drawn out as shown in FIGS. 19 and 20, the driving device 40 and the lifting device 80 are not operated, and the lifting device 80 is It will stay in the lowest state.

Before the lifting device 80 is raised, as shown in FIG. 21, the lever 42 and the screw holder are positioned at the lowest position, and the lifting sensing device 55 detects this and the current state is the lifting device. It is judged that 80 is in a completely lowered state.

In detail, in the state in which the lifting device 80 is completely lowered, the screw holder 56a may be positioned at the lowest position. In addition, at this time, the magnet 563 provided in the screw holder 56a is positioned at a position corresponding to the detection sensor 93 positioned below the pair of the detection sensors 552 and 553. Therefore, since the magnet 563 is sensed by the detection sensor 93 located at the lower side, the lifting device 80 may be determined to be completely lowered.

When it is determined that the elevating device 80 is completely lowered by the elevating detecting device 55, the driving device 40 may start operating when a user operates or the drawer door 30 is completely withdrawn. Can be.

If it is determined that the elevating device 80 is not completely lowered, the elevating detecting device 55 may output an abnormal signal and prevent the driving device 40 from operating.

When the drawer door 30 is completely drawn out to the set distance, the control unit 90 instructs the operation of the elevating motor 64. Then, the driving device 40 is operated by the lifting motor, and the lifting device 80 is elevated as shown in FIG. 22.

When the drawer door 30 is completely withdrawn and the withdrawal motor 14 is stopped, the elevating motor 64 may be driven by the control unit 90. The lifting device 80 may be configured to operate only in a situation in which the safe movement of the food or container 36 seated on the lifting device 80 is ensured by sufficiently drawing out the drawer door 30.

That is, the drawer door 30 is drawn out and the lifting device 80 is operated in a state where the front space S1 is completely exposed to the outside, so that the container 36 seated in the lifting device 80 or stored food It is possible not to interfere with these other doors (20,30) or cabinet (10).

In addition, in order to prevent the user's safety and damage to stored food, it may be configured to start the operation of the lifting device 80 after a set time has elapsed after the drawer door 30 is withdrawn.

In this embodiment, the elevation of the lifting device 80 means that the upper frame 82 is raised by the scissor assembly 84, and the lowering of the lifting device 80 is lowered by the scissor assembly 84. By this means that the upper frame 82 is lowered.

The driving device 40 is in a state in which it is connected to the lifting device 80, and thus, a state in which power can be transmitted to the lifting device 80 is possible. With the start of the operation of the driving device 40, power is transmitted to the lifting device 80, and the lifting device 80 starts to rise.

In detail, when the elevating motor 64 rotates forward or backward by an elevating or descending signal of the elevating device 80, the driving device 40 starts to operate. A plurality of gears between the lifting motor 64 and the screws 52 and 50a are rotated by the driving of the lifting motor 64 so that the screws 52 and 50a are rotated. As the screw holders 56 and 56a are raised as the screws 52 and 50a are rotated on both sides, the lever 42 is rotated.

When the lever 42 is moved upward, the height of the first rod 842a of the first scissor frame 84 connected to the lever 42 is increased by increasing the height of the lever 42. Then, the height of the first rod 842a of the first scissor frame 84 allows the scissor assembly 84 to be unfolded.

Eventually, as the scissor assembly 84 is unfolded, the upper frame 82 rises, and the container 36 or food seated on the support plate 81 rises, and finally, as shown in FIG. 23. The lifting device 80 is raised to the maximum height.

Meanwhile, as shown in FIG. 23, the lifting device 80 is stopped when it is raised to a height sufficient to facilitate access to the food or container 36 seated on the lifting device 80. In this state, the user can easily lift the food or container 36 without excessively bowing the waist. [S140: elevating step of lifting device]

When the lifting device 80 is in the raised state, the lever 42 and the screw holder are positioned at the highest position, and the lifting sensing device 55 detects this and the current state of the lifting device 80 is It is judged that it is in a completely elevated state.

When it is determined by the elevating detection device 55 that the elevating device 80 is in a fully elevated state as shown in FIG. 24, the elevating motor 64 is stopped. In this state, the lifting device 80 is located inside the drawer part 32, but the food or container 36 seated on the lifting device 80 is more than the opened upper surface of the drawer part 32. It can be located in a high position, allowing easy access by the user.

In particular, since the container 36 does not have to be bowed excessively for lifting, a safer and more convenient operation is possible.

Looking in more detail with reference to FIG. 23, the state in which the lifting device 80 is raised to the maximum, the lifting device 80 is positioned at a lower position than at least the upper end of the drawer part 32.

When the container 36 is seated on the driving device 80, and viewed with reference to the container 36, the top H1 of the container 36 is the top H2 of the lower storage space 12. ). At this time, the height of the user can reach the container 36 without reaching the waist, and the height of the container 36 can be the most suitable for use.

That is, although the driving device 40 has a structure that is lifted from the inside of the drawer part 32, the container 36 may be moved by the user when the container 36 is seated on the lifting device 80. It can be positioned at an easily accessible height. [S150: hoist stop stage]

Then, when the elevating device 80 reaches a set height, the elevating motor 64 stops and the timer 91 counts the stop time of the elevating motor 64. That is, in the state in which the elevating device 80 is completed, the elevating device 80 waits for a predetermined time.

The control unit 90 determines whether the time counted by the timer 91 reaches a set time. If it is determined in the control unit 90 that the set time has elapsed after the hoisting device 80 is stopped, the hoisting motor 64 starts reverse rotation and the hoisting device 80 descends.

At this time, the set time may be set to approximately 90 seconds. The set time may be set to a time sufficient for the user to receive food. When the set time is too short, the lifting device 80 may drop before completing the storage of food, which may cause inconvenience in use. If the set time is too long, the drawer door 30 is exposed for a long period of time in an open state. As a result, the loss of cold air may be excessive, and a problem of a decrease in cooling performance and an increase in power consumption may occur. Therefore, the setting period may be set to about 90 seconds.

Of course, the setting time may be set by the user through manipulation of the display 211 or voice input through the microphone 93, and it may be possible to adjust the time to a desired time.

In addition, the elapse of the set time in the state where the lifting device 80 is stopped and waiting may be displayed on the screen through the display 211 or externally output through the speaker 92. Therefore, the user can recognize the change in the set time and perform the work of storing food, and may determine when the drawer door 30 is closed. [S161: Set time elapsed judgment step]

On the other hand, when the user wants to close the drawer door 30 by completing the storage operation of the food before the set time has elapsed, any one of the operation units 214, 301, 302 is operated to descend the lifting device 80. Operation can be entered.

In addition, the user can determine the remaining time until the drawer door 30 is closed through the screen output from the display 211 or the voice output from the speaker 92, and accordingly the speed of food storage. Can decide. In addition, even if the remaining time remains too long until the drawer door 30 is closed, any one of the manipulation units 214, 301 and 302 is operated to lower the lifting device 80 and to draw in the drawer door 30. You can also force the operation.

That is, in order to lower the lifting device 80 and to draw in the drawer door 30 before the set time has elapsed while the lifting device 80 is raised, the user inputs one of the operation units 214,301,302. Is done. [S162: descending operation input step]

When the set time has elapsed or when the lowering operation is input, the control unit 90 instructs the operation of the elevating motor 64, and the elevating device 80 starts descending as shown in FIG. 25.

The lowering of the elevating device 80 may be made by the reverse rotation of the elevating motor 64, and may be gradually performed through a process opposite to the elevating process of the elevating device 80 described above.

In addition, when the lowering device 80 is completed as shown in FIG. 20, the lowering detecting device 55 detects completion of the lowering of the lowering device 80. That is, when the magnet 563 is sensed by the detection sensor 93 located below, the control unit 90 determines that the lifting device 80 is lowered and stops driving of the lifting motor 64. . [S170: elevating device descending stage]

When the lowering completion signal of the elevating device 80 is received, the control unit 90 releases the restraint of the withdrawal motor 14 at the same time. The control unit 90 may release the braking of the draw-out motor 14 or release the restraint of the drawer door 30 so that the drawer door 30 can be brought in. That is, the control unit 90 completely restrains the draw-in/out of the drawer door 30 until the lifting device 80 is completely lowered, so that the lifting operation of the lifting device 80 is stably performed and at the same time, food is stored. Work should also be carried out easily and safely. [S180: Door withdrawal restraint step]

Then, when the braking of the draw-out motor 14 is released, the control unit 90 instructs the draw-out motor 14 to rotate in reverse. The drawer door 30 may be drawn in as shown in FIG. 26 by the reverse rotation of the draw-in motor 14. [S190: Drawer door entry phase]

The draw-in motor 14 is rotated in reverse until the drawer door 30 is completely closed. 18, when the drawer door 30 is completely closed, it is possible to detect the completion of the drawer door 30 by the drawer detecting device 151. In addition, when the drawer door 30 is completely drawn in, the standby state is maintained so that the drawer door 30 can be opened again.

Then, the control unit 90 maintains a standby state continuously until a user's manipulation is input, and controls devices configuring a refrigeration cycle to perform an operation for cooling the interior.

Meanwhile, the present invention may further include various other control methods in addition to the above-described control method. Hereinafter, various control methods of a refrigerator according to an embodiment of the present invention will be described.

Hereinafter, other control methods of the refrigerator will be described in detail with reference to the drawings. The same steps as the above-described control method among the steps of the control method to be described below are denoted by the same reference numerals, and detailed description thereof will be omitted. And, it is possible that at least one of the following control methods is combined with each other.

The drawer door 30 stops for a set time while the lifting device 80 is raised, and a user can adjust the set time at this time. Hereinafter, a control method for adjusting the set time will be described in more detail.

27 is a flowchart illustrating an operation for adjusting the waiting time of the lifting state of the lifting device.

As illustrated, in order to draw in and out of the drawer door 30 at the bottom, a user can input an operation of the drawer door 30 through at least one of the manipulation units 214, 301 and 302. At this time, the proximity sensing device 213 recognizes the user's proximity.

Therefore, it is determined that a valid operation input is performed only when any one of the manipulation units 214, 301, and 302 is performed in the state where the user's proximity is recognized by the proximity sensing device 213, and the drawer door 30 is started to be withdrawn. Can be.

On the other hand, prior to the operation for withdrawing the drawer door 30, the user can set the set time for waiting in the elevated state by operating the display 211. The user can set it by entering the appropriate setting time according to the usage environment and pattern. [S110: Operation input step]

The control unit 90 controls the withdrawal motor 14 so that the operation of the withdrawal motor 14 starts when an effective user operation is input. When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled forward, and then withdrawn until it is in a state as shown in FIGS. 19 and 20 and then stopped. do. At this time, the withdrawal detecting device 152 may detect a state in which the drawer door 30 is completely withdrawn and determine the withdrawal state of the drawer door 30. [S120: Drawer door withdrawal step]

And, although not shown, at the same time as the drawer door withdrawal step is completed, the withdrawal motor 14 may be restrained by a brake, and the door withdrawal restraint step may be further performed as in the above-described embodiment. have.

Meanwhile, when the drawer door 30 is completely drawn out to the set distance, the control unit 90 instructs the operation of the elevating motor 64. Then, the driving device 40 is operated by the lifting motor 64, and the lifting device 80 is raised. [S140: elevating step of lifting device]

The lifting device 80 is stopped when it is raised to a height sufficient to facilitate access to the food or container 36 seated on the lifting device 80 as shown in FIG. 23. In this state, the user can easily lift the food or container 36 without excessively bowing the waist. [S150: hoist stop stage]

Then, when the elevating device 80 reaches a set height, the elevating motor 64 stops and the timer 91 counts the stop time of the elevating motor 64. That is, in the state in which the elevating device 80 is completed, the elevating device 80 waits for a predetermined time.

In addition, the elapse of the set time in the state where the lifting device 80 is stopped and waiting may be displayed on the screen through the display 211 or externally output through the speaker 92. Therefore, the user can recognize the change in the set time and perform the work of storing food, and may determine when the drawer door 30 is closed. [S161: Set time elapsed judgment step]

Meanwhile, a situation in which the elevating device 80 must be maintained in an elevated state for a longer period of time than a preset time may occur depending on a situation during food storage of the user. In this situation, the user may be able to arbitrarily adjust the set time through the operation of the operation units 214,301,302. [S163: Setting time operation input step]

That is, when it is deemed necessary to increase the set time in the state where the lifting device 80 is waiting to be lifted, the user operates the operating units 214, 301 and 302 to raise and lower the lifting device 80 and the drawer door ( 30) can be kept open.

For example, when the user operates the operation unit 214,301,302, counting for the increase in the set time may be stopped, and the user operates the operation unit 214,301,302 again in a state in which the storage of food is completed. The counting may be started or the descending operation input step may be performed as described above.

In addition, the user may operate the operation units 214, 301 and 302 to increase the set time itself. The setting time may be increased or initialized step by step according to the number of times or the time the user presses the operation units 214, 301 and 302 so that the setting time is substantially increased. At this time, the increased setting time is one time, and after the drawer door 30 is completely drawn in, it may be reset to the initial setting time. Of course, it may also be possible to reduce the set time through the manipulation of the operation units 214,301,302.

Meanwhile, the manipulation units 214, 301, and 302 may be configured to enable input by a touch or push operation. In addition, the operation units 214, 301, and 302 may include a microphone 93 or a microphone module capable of recognizing voice, and a user can easily operate the increase or decrease of the set time through voice during the storage of food.

In addition, the reset state of the set time by the user as well as the elapsed state of the set time may be output through the display 211 or the speaker 92 to be fed back to the user. [S200: Set time reset step]

When the set time has elapsed or when the lowering operation is input, the control unit 90 instructs the operation of the lifting motor 64, and the lifting device 80 is lowered. Then, when the lowering device 80 is completed as shown in FIG. 20, the control unit 90 stops the driving of the lifting motor 64. [S170: elevating device descending stage]

On the other hand, although not shown, when the lowering of the hoisting device is completed, it is possible to perform the above-described door draw-in and restraint release step so that the draw-out motor 14 can be rotated.

And, in the state that the lifting device 80 is completely lowered and the lifting motor 64 is stopped, the control unit 90 drives the draw-in and take-off motor 14 so that the drawer door 30 is drawn in. Can be. The draw-in motor 14 is operated until it is in a state as shown in FIG. 18 and the drawer door 30 is completely closed. [S190: Drawer door entry phase]

Meanwhile, in the drawer door 30, the drawer door 30 may be automatically drawn in and out in one operation according to a user's setting, or may be made in the withdrawal and lifting by each individual operation. . Hereinafter, an operation control method according to the setting of the drawer door 30 will be described.

28 is a flowchart illustrating an operation for performing the withdrawal and lifting operation of the drawer door by individual manipulation of the user.

As shown, the user can set an operation mode of the drawer door 30 before opening and closing the drawer door 30. That is, the user may set the operation of the automatic elevating or manual elevating mode through the operation of the display 211.

If the automatic lifting mode is set through the operation of the display 211, the drawer door 30 can be automatically drawn in and out by the user operating the operating unit 214,301,302 once.

In the case of the automatic elevating mode, it is possible to perform the operations as shown in FIGS. 17 and 27 described above.

On the other hand, when the manual lifting mode is set through the operation of the display 211, the drawer door 30 is pulled out and opened by the user's operation, and the lifting device 80 is raised by the user's additional operation. And after being lowered, the drawer door 30 is closed.

In this way, the user can set an operation mode of the drawer door 30 desired by the user in advance through the display 211 before the drawer door 30 is used. In addition, each time the manipulation unit 214, 301, 302 is operated, the drawer door 30 may be operated in a preset operation mode. [S300: Operation mode setting step]

When the automatic operation mode is set in the operation mode setting step, the above-described operations of FIGS. 17 and 27 may be performed, and detailed description thereof will be omitted.

Hereinafter, the operation of the drawer door 30 when the manual operation mode is set in the operation mode setting step will be described.

To draw in and out of the drawer door 30 at the bottom, a user can input an operation of the drawer door 30 through at least one of the manipulation units 214, 301 and 302. At this time, the proximity sensing device 213 recognizes the user's proximity.

Therefore, it is determined that a valid operation input is performed only when any one of the manipulation units 214, 301, and 302 is performed in the state where the user's proximity is recognized by the proximity sensing device 213, and the drawer door 30 is started to be withdrawn. Can be.

On the other hand, prior to the operation for withdrawing the drawer door 30, the user can set the set time for waiting in the elevated state by operating the display 211. The user can set it by entering the appropriate setting time according to the usage environment and pattern. [S110: Operation input step]

The control unit 90 controls the withdrawal motor 14 so that the operation of the withdrawal motor 14 starts when an effective user operation is input. When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled forward, and then withdrawn until it is in a state as shown in FIGS. 19 and 20 and then stopped. do. At this time, the withdrawal detecting device 152 may detect a state in which the drawer door 30 is completely withdrawn and determine the withdrawal state of the drawer door 30. [S120: Drawer door withdrawal step]

Meanwhile, in the state in which the drawer door 30 is withdrawn, the user may input the operation of the lifting device 80 by operating the operation units 214, 301 and 302 again. In the control unit 90, when the lifting operation of the lifting device 80 is input while the drawer door 30 is completely withdrawn, the lifting device 80 is raised. [S311: elevating operation input judgment step]

On the other hand, in the state in which the drawer door 30 is withdrawn, the user may input the operation of closing the drawer door 30 by operating the manipulation units 214, 301 and 302 again. When the user only wants to check the internal food by opening the drawer door 30, the user does not need to elevate the lifting device 80, so that the drawer door 30 is closed. When the operation of closing the drawer door 30 is input from the control unit 90, the drawer door 30 may be closed by performing a step of drawing in the drawer door 30. [S312: closing operation input step]

On the other hand, when an operation to raise the lifting device 80 is input by a user, the control unit 90 raises the lifting device 80. At this time, the withdrawal motor 14 may be restrained by a brake, and the door withdrawal restraint step may be further performed as in the above-described embodiment.

The controller 90 instructs the operation of the elevating motor 64 in the state where the withdrawal motor 14 is restrained. Then, the driving device 40 is operated by the lifting motor 64, and the lifting device 80 is raised. [S140: elevating step of lifting device]

The lifting device 80 is stopped when it is raised to a height sufficient to facilitate access to the food or container 36 seated on the lifting device 80 as shown in FIG. 23. In this state, the user can easily lift the food or container 36 without excessively bowing the waist. [S150: hoist stop stage]

Then, when the elevating device 80 reaches a set height, the elevating motor 64 stops and the timer 91 counts the stop time of the elevating motor 64. That is, in the state in which the elevating device 80 is completed, the elevating device 80 waits for a predetermined time.

In addition, the elapse of the set time in the state where the lifting device 80 is stopped and waiting may be displayed on the screen through the display 211 or externally output through the speaker 92. Therefore, the user can recognize the change in the set time and perform the work of storing food, and may determine when the drawer door 30 is closed. [S161: Set time elapsed judgment step]

On the other hand, when the user wants to close the drawer door 30 by completing the storage operation of the food before the set time has elapsed, any one of the operation units 214, 301, 302 is operated to descend the lifting device 80. Operation can be entered.

In addition, the user can determine the remaining time until the drawer door 30 is closed through the screen output from the display 211 or the voice output from the speaker 92, and accordingly the speed of food storage. Can decide. In addition, even if the remaining time remains too long until the drawer door 30 is closed, any one of the manipulation units 214, 301 and 302 is operated to lower the lifting device 80 and to draw in the drawer door 30. You can also force the operation.

That is, in order to lower the lifting device 80 and to draw in the drawer door 30 before the set time has elapsed while the lifting device 80 is raised, the user inputs one of the operation units 214,301,302. Is done. [S162: lowering operation input step] Of course, before the setting time has elapsed, the setting time adjustment step may be performed to further maintain the open state of the drawer door 30.

When the set time has elapsed or when the lowering operation is input, the control unit 90 instructs the operation of the lifting motor 64, and the lifting device 80 is lowered. Then, when the lowering device 80 is completed as shown in FIG. 20, the control unit 90 stops the driving of the lifting motor 64. [S170: elevating device descending stage]

On the other hand, although not shown, when the lowering of the hoisting device is completed, it is possible to perform the above-described door draw-in and restraint release step so that the draw-out motor 14 can be rotated.

And, in the state that the lifting device 80 is completely lowered and the lifting motor 64 is stopped, the control unit 90 drives the draw-in and take-off motor 14 so that the drawer door 30 is drawn in. Can be. The draw-in motor 14 is operated until it is in a state as shown in FIG. 18 and the drawer door 30 is completely closed. [S190: Drawer door entry phase]

Of course, if necessary, the user may operate the display unit 211 to operate the operation units 214, 301 and 302 so that the drawer door 30 is drawn in and out and the lifting device 80 is deactivated.

If the failure of the lifting device 80 or the user does not want to use the lifting device 80, it can be set through the display 211. That is, the drawer door 30 can be set to any one of a draw-out mode, an automatic lift mode and a manual lift mode.

On the other hand, when the opening of the drawer door 30 is started by a user's manipulation, the drawer door 30 is completely withdrawn and then stopped, or the drawer door 30 is completely withdrawn and stopped in an elevated state.

Therefore, it is necessary to check the drawer door 30 during the withdrawal process and close the drawer door 30. Particularly, when the drawer door 30 is in a mode in which the drawer door 30 is automatically pulled in and out, once the drawer door 30 is opened, the lifting device 80 must be lifted. If you want, you can do unnecessary work. Hereinafter, a method of controlling the drawer door 30 to prevent this problem will be described.

29 is a flowchart illustrating an operation of closing the drawer door and closing it again.

As illustrated, in order to draw in and out of the drawer door 30 at the bottom, a user can input an operation of the drawer door 30 through at least one of the manipulation units 214, 301 and 302. At this time, the proximity sensing device 213 recognizes the user's proximity.

Therefore, it is determined that a valid operation input is performed only when any one of the manipulation units 214, 301, and 302 is performed in the state where the user's proximity is recognized by the proximity sensing device 213, and the drawer door 30 is started to be withdrawn. Can be. [S110: Operation input step]

The control unit 90 controls the withdrawal motor 14 so that the operation of the withdrawal motor 14 starts when an effective user operation is input. When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled forward, and then withdrawn until it is in a state as shown in FIGS. 19 and 20 and then stopped. do. At this time, the withdrawal detecting device 152 may detect a state in which the drawer door 30 is completely withdrawn and determine the withdrawal state of the drawer door 30. [S120: Drawer door withdrawal step]

In the state in which the drawer door 30 is being pulled out, the user may input the stop of the drawer door 30 by operating the manipulation units 214, 301 and 302. [S400: Drawer door stop input] When the drawer door 30 is withdrawn due to a user's misoperation, or for simple confirmation only, when the drawer door 30 is opened to a desired point, the manipulation unit 214,301,302 is operated. The drawer motor 14 may be stopped and the drawer door 30 may be withdrawn. [S410: Stop the withdrawal motor]

In the state in which the drawer door 30 is open, the timer 91 counts the time the drawer door 30 is open. In addition, when it is determined that the drawer door 30 is open for a predetermined time or longer, the control unit 90 causes the drawer door 30 to close. [S421: Set time elapsed judgment step]

On the other hand, if the user has completed the internal check of the drawer door 30 in a state in which the set time has not elapsed, the closing operation of the drawer door 30 may be input by operating the operation units 214, 301 and 302. The control unit 90 may allow the drawer door 30 to be closed by the operation of the operation units 214, 301 and 302. [S422: Drawer door closing input judgment step]

Meanwhile, in a state in which the set time has not elapsed, the user may push the drawer door 30 to close it. At this time, the user does not need to push the drawer door 30 to be completely closed, and pushes the drawer motor 14 so that a load greater than a size set in a reverse rotation direction (a direction opposite to a rotation direction when drawing) is generated. If only the cycle, the control unit 90 can sense this to rotate the withdrawal motor 14 and the drawer door 30 is closed. [S423: Drawer door push input judgment step]

That is, in a state in which the drawer door 30 is stopped while being withdrawn by a user's stop input, a set time has elapsed, a closing operation through the operation units 214, 301 and 302 is input, or the drawer door 30 is pushed to close. When an operation is input, the control unit 90 may rotate the drawer motor 14 backward so that the drawer door 30 is closed, so that the drawer door 30 is completely closed as shown in FIG. 18. [S190: Drawer door entry phase]

When there is no manipulation of the operation units 214, 301 and 302 for stopping the door in the process of drawing out the drawer door 30, the operation may be performed in the automatic lifting mode or the manual lifting mode of the drawer door 30 described above. [S440: elevating driving stage]

On the other hand, the refrigerator 1 may be in a situation where normal operation is impossible due to an obstacle during drawing in and out of the drawer door. Hereinafter, a method of controlling the drawer door 30 during obstacle recognition will be described.

30 is a flowchart illustrating an operation when an obstacle is recognized during withdrawal of the drawer door.

As illustrated, in order to draw in and out of the drawer door 30 at the bottom, a user can input an operation of the drawer door 30 through at least one of the manipulation units 214, 301 and 302. At this time, the proximity sensing device 213 recognizes the user's proximity.

Therefore, it is determined that a valid operation input is performed only when any one of the manipulation units 214, 301, and 302 is performed in the state where the user's proximity is recognized by the proximity sensing device 213, and the drawer door 30 is started to be withdrawn. Can be. [S110: Operation input step]

The control unit 90 controls the withdrawal motor 14 so that the operation of the withdrawal motor 14 starts when an effective user operation is input. When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled forward, and then withdrawn until it is in a state as shown in FIGS. 19 and 20 and then stopped. do. At this time, the withdrawal detecting device 152 may detect a state in which the drawer door 30 is completely withdrawn and determine the withdrawal state of the drawer door 30. [S120: Drawer door withdrawal step]

When the drawer door 30 is being pulled out and the drawer door 30 cannot perform normal withdrawal, the control unit 90 determines that an obstacle is recognized. For example, when a body of an object or a person is positioned on a path through which the drawer door 30 is drawn in or out, food is caught between the drawer doors 30, or structural damage to the drawer door 30, etc. Depending on the cause, it may be determined as an obstacle or an obstacle when the drawer door 30 is withdrawn.

When the drawer door 30 does not complete withdrawal within a set time, or when a load greater than a load applied to the draw-in motor 14 is applied, the control unit 90 normally draws the drawer door 30 due to an obstacle. You judge this as impossible. On the other hand, if the control unit 90 determines that the situation is a failure, it is possible to immediately output the failure through the display 211 or the speaker 92. Therefore, it is possible to induce immediate action by the user. [S500: Disability judgment stage]

When it is determined that an obstacle has occurred in the control unit 90, the control unit 90 stops the operation of the drawing-out motor 14. When the withdrawal motor 14 is continuously operated, since the damage of food, a user's safety problem, or the damage of the refrigerator itself is concerned, the control unit 90 may include the withdrawal motor 14 Will stop. In a situation in which the drawer door is withdrawn, the user may remove the obstacle or the obstacle. [S510: Stopping the withdrawal motor]

With the drawer door 30 partially open, the timer 91 counts the time the drawer door 30 is open. In addition, when it is determined that the drawer door 30 is open for a predetermined time or longer, the control unit 90 causes the drawer door 30 to close. When the user removes an obstacle or resolves a failure situation, the drawer door may be closed when the set time has elapsed. [S521: Set time elapsed judgment step]

In addition, when the user removes the obstacle or the obstacle is resolved in a state in which the set time has not elapsed, the closing operation of the drawer door 30 may be input by operating the operation units 214, 301 and 302. The control unit 90 may allow the drawer door 30 to be closed by the operation of the operation units 214, 301 and 302. [S522: Drawer door closing input judgment step]

In addition, when the user removes an obstacle or resolves an obstacle in a state in which the set time has not elapsed, the drawer door 30 may be pushed to close. At this time, the user does not need to push the drawer door 30 to be completely closed, and pushes the drawer motor 14 so that a load greater than a size set in a reverse rotation direction (a direction opposite to a rotation direction when drawing) is generated. If only the cycle, the control unit 90 can sense this to rotate the withdrawal motor 14 and the drawer door 30 is closed. [S523: Drawer door push input judgment step]

That is, in a state in which the drawer door 30 is stopped while being pulled out due to an obstacle, a set time has elapsed, a closing operation through the manipulation units 214,301,302 is input, or a closing operation is pushed by pushing the drawer door 30 In the case of the control unit 90, the drawer door 30 may be reversely rotated so that the drawer door 30 is closed, so that the drawer door 30 is completely closed as shown in FIG. 18. [S530: Drawer door entry phase]

On the other hand, when the user removes an obstacle or the obstacle is resolved in a state in which the set time has not elapsed, the drawer door 30 may be pulled to open. [S523: Drawer door pull input determination step] At this time, the user does not need to push the drawer door 30 to be completely closed, and the size set in the rotation direction (the direction of rotation at the time of rotation) to the withdrawal motor 14 If it is pushed so that the above load is generated, the control unit 90 detects this and rotates the draw-in/out motor 14 so that the drawer door 30 is opened. [S540: Drawer door additional withdrawal step]

In addition, when the drawer door 30 is completely withdrawn, the operation may be performed in the automatic lifting mode or the manual lifting mode of the drawer door 30 described above. [S550: elevating driving stage]

31 is a flowchart illustrating an operation when an obstacle is recognized during the entry of the drawer door.

As illustrated, in order to draw in and out of the drawer door 30 at the bottom, a user can input an operation of the drawer door 30 through at least one of the manipulation units 214, 301 and 302. At this time, the proximity sensing device 213 recognizes the user's proximity.

Therefore, it is determined that a valid operation input is performed only when any one of the manipulation units 214, 301, and 302 is performed in the state where the user's proximity is recognized by the proximity sensing device 213, and the drawer door 30 is started to be withdrawn. Can be. [S110: Operation input step]

The control unit 90 controls the withdrawal motor 14 so that the operation of the withdrawal motor 14 starts when an effective user operation is input. When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled forward, and then withdrawn until it is in a state as shown in FIGS. 19 and 20 and then stopped. do. At this time, the withdrawal detecting device 152 may detect a state in which the drawer door 30 is completely withdrawn and determine the withdrawal state of the drawer door 30. [S120: Drawer door withdrawal step]

And, although not shown, at the same time as the drawer door withdrawal step is completed, the withdrawal motor 14 may be restrained by a brake, and the door withdrawal restraint step may be further performed as in the above-described embodiment. have.

Meanwhile, when the drawer door 30 is completely drawn out to the set distance, the control unit 90 instructs the operation of the elevating motor 64. Then, the driving device 40 is operated by the lifting motor 64, and the lifting device 80 is raised. [S140: elevating step of lifting device]

The lifting device 80 is stopped when it is raised to a height sufficient to facilitate access to the food or container 36 seated on the lifting device 80 as shown in FIG. 23. In this state, the user can easily lift the food or container 36 without excessively bowing the waist. [S150: hoist stop stage]

In the control unit, when a set time elapses or when a descending signal of the elevating device is input, an operation of the elevating motor 64 is instructed, and the elevating device 80 descends. Then, when the lowering device 80 is completed as shown in FIG. 20, the control unit 90 stops the driving of the lifting motor 64. [S170: elevating device descending stage]

On the other hand, although not shown, when the lowering of the hoisting device is completed, it is possible to perform the above-described door draw-in and restraint release step so that the draw-out motor 14 can be rotated.

When the drawer door 30 is in the process of being drawn in, if the drawer door 30 cannot perform the normal drawing, the controller 90 determines that an obstacle is recognized. For example, when a body of an object or a person is positioned on a path through which the drawer door 30 is drawn in or out, food is caught between the drawer doors 30, or structural damage to the drawer door 30, etc. Depending on the cause, it may be determined as an obstacle or an obstacle when the drawer door 30 is drawn in.

The control unit 90, the drawer door 30, the drawer is not completed within a set time, or if a load greater than the load set on the drawer motor 14 is applied to the normal drawer of the drawer door 30 by an obstacle You judge this as impossible.

On the other hand, if the control unit 90 determines that the situation is a failure, it is possible to immediately output the failure through the display 211 or the speaker 92. Therefore, it is possible to induce immediate action by the user. [S600: Disability judgment stage]

When it is determined that an obstacle has occurred in the control unit 90, the control unit 90 stops the operation of the drawing-out motor 14. When the withdrawal motor 14 is continuously operated, since the damage of food, a user's safety problem, or the damage of the refrigerator itself is concerned, the control unit 90 may include the withdrawal motor 14 Will stop. In the state in which the drawer door is stopped, the user can remove an obstacle or an obstacle. [S610: Stopping the withdrawal motor]

With the drawer door 30 partially open, the timer 91 counts the time the drawer door 30 is open. In addition, when it is determined that the drawer door 30 is open for a predetermined time or longer, the control unit 90 causes the drawer door 30 to close. When the user removes an obstacle or resolves a failure situation, the drawer door may be closed when the set time has elapsed. [S621: Set time elapsed judgment step]

In addition, when the user removes the obstacle or the obstacle is resolved in a state in which the set time has not elapsed, the closing operation of the drawer door 30 may be input by operating the operation units 214, 301 and 302. The control unit 90 may allow the drawer door 30 to be closed by the operation of the operation units 214, 301 and 302. [S622: Drawer door closing input judgment step]

In addition, when the user removes an obstacle or resolves an obstacle in a state in which the set time has not elapsed, the drawer door 30 may be pushed to close. At this time, the user does not need to push the drawer door 30 to be completely closed, and pushes the drawer motor 14 so that a load greater than a size set in a reverse rotation direction (a direction opposite to a rotation direction when drawing) is generated. If only the cycle, the control unit 90 can sense this to rotate the withdrawal motor 14 and the drawer door 30 is closed. [S623: Drawer door push input judgment step]

That is, in the state in which the drawer door 30 is stopped during the insertion due to an obstacle, a set time has elapsed, a closing operation through the manipulation units 214,301,302 is input, or a closing operation is pushed by pushing the drawer door 30 In the case of the control unit 90, the drawer door 30 may be reversely rotated so that the drawer door 30 is closed, so that the drawer door 30 is completely closed as shown in FIG. 18. [S630: Drawer door entry phase]

On the other hand, if the user wants to solve the obstacle by reopening the door in a state in which the set time has not elapsed, the drawer door 30 can be pulled to open. [S523: Drawer door pull input determination step] At this time, the user does not need to push the drawer door 30 to be completely closed, and the size set in the rotation direction (the direction of rotation at the time of rotation) to the withdrawal motor 14 If it is pushed so that the above load is generated, the control unit 90 detects this and rotates the draw-in/out motor 14 so that the drawer door 30 is opened. [S540: Drawer door additional withdrawal step]

32 is a flowchart illustrating an operation when an obstacle is recognized during the ascent of the lifting device.

As illustrated, in order to draw in and out of the drawer door 30 at the bottom, a user can input an operation of the drawer door 30 through at least one of the manipulation units 214, 301 and 302. At this time, the proximity sensing device 213 recognizes the user's proximity.

Therefore, it is determined that a valid operation input is performed only when any one of the manipulation units 214, 301, and 302 is performed in the state where the user's proximity is recognized by the proximity sensing device 213, and the drawer door 30 is started to be withdrawn. Can be. [S110: Operation input step]

The control unit 90 controls the withdrawal motor 14 so that the operation of the withdrawal motor 14 starts when an effective user operation is input. When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled forward, and then withdrawn until it is in a state as shown in FIGS. 19 and 20 and then stopped. do. At this time, the withdrawal detecting device 152 may detect a state in which the drawer door 30 is completely withdrawn and determine the withdrawal state of the drawer door 30. [S120: Drawer door withdrawal step]

And, although not shown, at the same time as the drawer door withdrawal step is completed, the withdrawal motor 14 may be restrained by a brake, and the door withdrawal restraint step may be further performed as in the above-described embodiment. have.

Meanwhile, when the drawer door 30 is completely drawn out to the set distance, the control unit 90 instructs the operation of the elevating motor 64. Then, the driving device 40 is operated by the lifting motor 64, and the lifting device 80 is raised. [S140: elevating step of lifting device]

When the elevation of the lifting device 80 is in progress, and when the lifting device 80 is unable to perform normal ascent, the control unit 90 determines that an obstacle is recognized. For example, various causes, such as an object or a person's body positioned on a path where the lifting device 80 is elevated, or when food is caught between the drawer doors 30 or structural damage of the drawer doors 30, etc. By this, when the lifting device 80 is elevated, it may be determined as an obstacle or an obstacle.

The control unit 90 is the normal rise of the lifting device 80 due to an obstacle when the lifting device 80 does not complete the rise within a set time or when a load greater than the load set on the lifting motor 64 is applied. It is judged impossible.

On the other hand, if the control unit 90 determines that the situation is a failure, it is possible to immediately output the failure through the display 211 or the speaker 92. Therefore, it is possible to induce immediate action by the user. [S700: Disability judgment stage]

When it is determined that an obstacle has occurred in the control unit 90, the control unit 90 stops the operation of the elevating motor 64. When the elevating motor 64 is continuously operated, since food damage, a user's safety problem, or damage to the refrigerator itself is concerned, the control unit 90 stops the elevating motor 64 Is ordered. And. In the state in which the lifting device 80 is stopped, the user can remove obstacles or eliminate obstacles. [S710: Stopping the withdrawal motor]

In the state in which the lifting device 80 is partially elevated, the timer 91 counts the time from the time when the lifting device 80 is stopped. Then, when the time counted in the timer has elapsed more than the set time, the control unit 90 causes the drawer door 30 to close. [S621: Set time elapsed judgment step]

In addition, when the user removes an obstacle or resolves an obstacle condition in a state in which the set time has not elapsed, the operation of the operation units 214, 301, and 302 may be used to input a descending operation of the elevating device 80. The lifting unit 80 may be lowered in the control unit 90 by the operation of the operation units 214, 301, and 302. [S722: elevating device descending input judgment step]

In the control unit, when a set time elapses or when a descending signal of the elevating device is input, an operation of the elevating motor 64 is instructed, and the elevating device 80 descends. Then, when the lowering device 80 is completed as shown in FIG. 20, the control unit 90 stops the driving of the lifting motor 64. [S170: elevating device descending stage]

On the other hand, although not shown, when the lowering of the hoisting device is completed, it is possible to perform the above-described door draw-in and restraint release step so that the draw-out motor 14 can be rotated.

And, in the state that the lifting device 80 is completely lowered and the lifting motor 64 is stopped, the control unit 90 drives the draw-in and take-off motor 14 so that the drawer door 30 is drawn in. Can be. The draw-in motor 14 is operated until it is in a state as shown in FIG. 18 and the drawer door 30 is completely closed. [S190: Drawer door entry phase]

In addition, since a situation in which the drawer door 30 is pulled in and out and lifted is resolved, when the user's operation is input, the drawer door 30 can be operated normally.

33 is a flowchart illustrating an operation when an obstacle is recognized during the descent of the lifting device.

As illustrated, in order to draw in and out of the drawer door 30 at the bottom, a user can input an operation of the drawer door 30 through at least one of the manipulation units 214, 301 and 302. At this time, the proximity sensing device 213 recognizes the user's proximity.

Therefore, it is determined that a valid operation input is performed only when any one of the manipulation units 214, 301, and 302 is performed in the state where the user's proximity is recognized by the proximity sensing device 213, and the drawer door 30 is started to be withdrawn. Can be. [S110: Operation input step]

The control unit 90 controls the withdrawal motor 14 so that the operation of the withdrawal motor 14 starts when an effective user operation is input. When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled forward, and then withdrawn until it is in a state as shown in FIGS. 19 and 20 and then stopped. do. At this time, the withdrawal detecting device 152 may detect a state in which the drawer door 30 is completely withdrawn and determine the withdrawal state of the drawer door 30. [S120: Drawer door withdrawal step]

And, although not shown, at the same time as the drawer door withdrawal step is completed, the withdrawal motor 14 may be restrained by a brake, and the door withdrawal restraint step may be further performed as in the above-described embodiment. have.

Meanwhile, when the drawer door 30 is completely drawn out to the set distance, the control unit 90 instructs the operation of the elevating motor 64. Then, the driving device 40 is operated by the lifting motor 64, and the lifting device 80 is raised. [S140: elevating step of lifting device]

The lifting device 80 is stopped when it is raised to a height sufficient to facilitate access to the food or container 36 seated on the lifting device 80 as shown in FIG. 23. In this state, the user can easily lift the food or container 36 without excessively bowing the waist. [S150: hoist stop stage]

In the control unit, when a set time elapses or when a descending signal of the elevating device is input, an operation of the elevating motor 64 is instructed, and the elevating device 80 descends. [S170: elevating device descending stage]

When the lowering of the elevating device 80 is in progress, when the elevating device 80 cannot perform the normal descending, the controller 90 determines that an obstacle is recognized. For example, various causes such as an object or a person's body positioned on a path where the lifting device 80 is elevated, food is caught between the drawer doors 30 or structural damage to the drawer doors 30. By this, it may be determined as an obstacle or an obstacle when the lifting device 80 descends.

The control unit 90 is the normal lowering of the lifting device 80 due to an obstacle when the lifting device 80 does not finish descending within a set time or when a load greater than a load set on the lifting motor 64 is applied. It is judged impossible.

On the other hand, if the control unit 90 determines that the situation is a failure, it is possible to immediately output the failure through the display 211 or the speaker 92. Therefore, it is possible to induce immediate action by the user. [S800: Disability judgment stage]

When it is determined that an obstacle has occurred in the control unit 90, the control unit 90 stops the operation of the elevating motor 64. When the elevating motor 64 is continuously operated, since food damage, a user's safety problem, or damage to the refrigerator itself is concerned, the control unit 90 stops the elevating motor 64 Is ordered. And. In the state in which the lifting device 80 is stopped, the user can remove obstacles or eliminate obstacles. [S810: Step of stopping the withdrawal motor]

When the lifting device 80 is partially lowered, the timer 91 counts the time from the time when the lifting device 80 is stopped. Then, when the time counted by the timer has elapsed more than the set time, the control unit 90 causes the lifting device 80 to descend. [S821: Set time elapsed judgment step]

In addition, when the user removes an obstacle or resolves an obstacle condition in a state in which the set time has not elapsed, the operation of the operation units 214, 301, and 302 may be used to input a descending operation of the elevating device 80. The lifting unit 80 may be closed by the control unit 90 by the operation of the operation units 214, 301, and 302. [S822: elevating device descending input judgment step]

In the control unit, when a set time elapses or when a descending signal of the elevating device is input, an operation of the elevating motor 64 is instructed, and the elevating device 80 descends. Then, when the lowering device 80 is completed as shown in FIG. 20, the control unit 90 stops the driving of the lifting motor 64. [S170: elevating device descending stage]

On the other hand, although not shown, when the lowering of the hoisting device is completed, it is possible to perform the above-described door draw-in and restraint release step so that the draw-out motor 14 can be rotated.

And, in the state that the lifting device 80 is completely lowered and the lifting motor 64 is stopped, the control unit 90 drives the draw-in and take-off motor 14 so that the drawer door 30 is drawn in. Can be. The draw-in motor 14 is operated until it is in a state as shown in FIG. 18 and the drawer door 30 is completely closed. [S190: Drawer door entry phase]

In addition, since a situation in which the drawer door 30 is pulled in and out and lifted is resolved, when the user's operation is input, the drawer door 30 can be operated normally.

Claims (20)

Refrigerator control method according to an embodiment of the present invention,
A lift mode setting step of setting the lift mode of the drawer door;
A manipulation input step in which a user manipulates a manipulation unit to start withdrawing the drawer door;
A drawer door withdrawal step in which the drawer door is opened by being driven by a user's manipulation and the drawer door is withdrawn;
A lifting device lifting step in which a lifting motor is driven after the drawer door is completely withdrawn, and the lifting device is elevated to a set height; And
Including the drawer door closing step of closing the drawer door after the completion of the lowering of the lifting device; includes,
In the step of setting the lifting mode,
A mode in which the drawing-in/out of the drawer door and the lifting/lowering of the lifting device are continuously completed by a single operation of the operation unit;
It characterized in that it comprises a mode in which the withdrawal of the drawer door and the lifting of the lifting device are completed step by step in response to a plurality of manipulations of the operation unit.
According to claim 1,
The elevator mode set in the step of setting the elevator mode, the control method of the refrigerator, characterized in that can be output through the display to output the current setting state.
According to claim 1,
The lift mode set in the step of setting the lift mode is a control method of a refrigerator, characterized in that can be output through the speaker to output the current setting state.
According to claim 1,
In the step of setting the hoisting mode, the user may input and set the hoisting mode through manipulation of a display, thereby controlling the refrigerator.
According to claim 1,
In the step of setting the hoisting mode, the user can set the hoisting mode through manipulation of the operation unit, thereby controlling the refrigerator.
According to claim 1,
A control method of a refrigerator, characterized in that one of the elevating modes is executed according to the number of manipulation inputs of the manipulation unit.
According to claim 1,
Control method of the refrigerator, characterized in that any one of the lifting mode is executed according to the operation input time of the operation unit.
According to claim 1,
In the operation input step, when the operation signal of the operation unit is input while the user's proximity is recognized by the proximity detection device, it is determined as a valid operation signal.
According to claim 1,
The lifting mode,
An automatic elevating mode in which the drawer door withdrawal step, the elevating device elevating step, and the drawer door withdrawing step are continuously performed without additional manipulation when the manipulation unit is operated;
When the operation of the operation unit, the drawer door withdrawal step is performed, and after the completion of the drawer door withdrawal step, it can be set to any one of a manual elevating mode in which the elevating device elevating step is performed upon further manipulation of the operation unit. How to control the refrigerator.
According to claim 1,
The lifting device lifting step,
A lifting device raising step in which the lifting motor is driven to lift the lifting device when the drawer door is completely withdrawn;
When the hoisting device reaches a set height, the hoisting device stopping step of maintaining the state in which the drive of the hoisting motor is stopped; And
The control method of the refrigerator comprising the step of lowering the elevating device when the set time passes after the start of the elevating device stop step so that the elevating motor is driven and the elevating device descends to an initial position.
The method of claim 10,
If the operation unit is operated before the set time elapses in the step of stopping the lifting device, the lifting device is lowered immediately.
According to claim 1,
The control method of the refrigerator, characterized in that the drawer door is closed again by operating the operation unit after the end of the drawer door withdrawal step.
According to claim 1,
A control method of a refrigerator, characterized in that, when the operation unit is operated while the drawer door withdrawal step is performed, the withdrawal motor is stopped.
According to claim 1,
The control method of the refrigerator, characterized in that performing the drawer door drawing step when the drawer door is stopped while the drawer door is taken out, the set time is elapsed.
According to claim 1,
The control method of the refrigerator, characterized in that performing the drawer door drawing step when the operation of the operation unit while the drawer door is stopped while the drawer door drawing step is performed.
According to claim 1,
The control method of the refrigerator, characterized in that performing the drawer door pulling-in step by pushing the door and inputting a push operation while the drawer door is stopped during the drawing-out step of the drawer door.
A cabinet provided with an upper storage space and a lower storage space;
A drawer door provided to be drawn in and out of the lower storage space and opening and closing the lower storage space;
A lifting device provided inside the drawer door to seat the food and elevate in the vertical direction;
A drawer motor that provides power for drawing in and out of the drawer door;
An elevating motor connected to the elevating device and providing power for elevating the elevating device;
An operation unit to which a user's operation for operation of the drawer door is input; And
The control unit includes a control unit that controls the operation of the withdrawal motor and the lift motor according to the lift mode set by the user,
The lifting mode,
A mode in which the drawing-in/out of the drawer door and the lifting/lowering of the lifting device are continuously completed by a single operation of the operation unit;
Refrigerator, characterized in that it can be set to any one of the modes in which the withdrawal of the drawer door and the lifting of the lifting device is completed step by step in response to a plurality of operations of the operation unit.
The method of claim 17,
A refrigerator further comprising a display for displaying the set lift mode.
The method of claim 18,
The refrigerator is characterized in that the display is a touch display capable of inputting the lift mode.
The method of claim 17,
The refrigerator according to the operating time or the number of operation times of the operation unit, the automatic lifting mode or the manual lifting mode can be selectively input for setting.

Images