KR20200140570A - Refrigerator - Google Patents

Abstract

The present invention relates to a refrigerator. According to an embodiment of the present invention, the refrigerator comprises: a cabinet having an inner case having a storage space; a drawer type door opening and closing the storage space and mounted to be inserted to and withdrawn from the cabinet; a lifting device provided to the door and enabling at least a portion of the door to be lifted; a door gasket formed around a back surface of the door and airtightly sealing a gap between the door and the cabinet while the door is closed; a magnet mounting unit formed on one side surface of both side surfaces of the door and storing a magnet; a door sensing device mounted in the inner case facing the magnet mounting unit while the door is closed and sensing the magnet; a control unit connected to the door sensing device; and an output means connected to the control unit and outputting an opened state of the door through the same when the magnet of the door sensing device is not sensed.

Description

Refrigerator {Refrigerator}

The present invention relates to a refrigerator.

In general, refrigerators are home appliances that allow low-temperature storage of food in an internal storage space that is shielded by a door. To this end, the refrigerator is configured to store the stored food in an optimal state by cooling the interior of the storage space using cold air generated through heat exchange with the refrigerant circulating through the refrigeration cycle.

Recent refrigerators are gradually becoming larger and multifunctional in accordance with changes in dietary life and the trend of high-end products, and refrigerators with various structures and convenience devices that enable users' convenience and efficient use of internal space are being released. .

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

Refrigerator doors can be classified into a rotating door in which the storage space is opened and closed by rotation, and a drawer door in which the storage space is opened and closed.

In addition, the drawer door is often disposed in the lower area of the refrigerator. When the drawer door is disposed in the lower area of the refrigerator, the waist must be bowed to take out the basket or food accommodated in the drawer door, and the basket or If the weight of the food is heavy, you may feel inconvenient to use the basket or cause injury.

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

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

However, in such a prior art, a mechanism for lifting the bin is provided in the drawer door, so that the door itself becomes heavy. Therefore, in some cases, there is a problem that the door may not be completely closed during the process of closing the door.

Of course, a general switch structure for detecting the door closing may be applied, but it is possible to effectively detect that the door is not closed finely due to the repulsive force of the door gasket for the airtightness of the door or the door is slightly opened again by the repulsive force. There is no problem.

When the drawer door is left unattended in a state where it is not completely closed, there is a problem that the loss of cold air and unnecessary increase in power consumption occur.

An object of the present invention is to provide a refrigerator capable of outputting a notification by sensing that a drawer door having a structure capable of being lifted and lowered is slightly opened.

An object of the present invention is to provide a refrigerator capable of effectively detecting the fine opening of a drawer door.

An object of the present invention is to provide a refrigerator capable of preventing exposure of a component for detecting minute opening of a drawer door.

An object of the present invention is to provide a refrigerator capable of detecting micro-opening of a drawer door using magnetic force and improving detection reliability.

An object of the present invention is to provide a refrigerator that prevents micro-opening of a drawer door.

An object of the present invention is to provide a refrigerator capable of detecting the opening of a drawer door in a non-contact manner.

A refrigerator according to an embodiment of the present invention includes: a cabinet including an inner case forming a storage space; A drawer-type door that opens and closes the storage space and is mounted to the cabinet to be retractable; An elevating device provided on the door and configured to elevate at least a portion of the door; A door gasket formed around a rear surface of the door, and sealing a space between the door and the cabinet when the door is closed; A magnet mounting portion formed on one of both side surfaces of the door and receiving a magnet; A door sensing device mounted on the inner case facing the magnet mounting portion when the door is closed, and sensing the magnet; A control unit connected to the door detection device; It includes an output means connected to the control unit, and when the door detection device does not detect a magnet, it may output that the door is in an open state through the output means.

The door may include a door unit for opening and closing the storage space; A drawer part connected to the door part and forming a storage space may be included, and the magnet mounting part may be formed on a side surface of the drawer part.

The drawer unit includes: a drawer body formed of a plastic material and forming the shape of the drawer unit; An outer side plate mounted on an outer surface of the drawer body and formed of a metal material to form an external shape of the drawer portion, and the magnet mounting portion and the magnet may be shielded by the outer side plate.

The magnet mounting portion may be formed on a side surface of the drawer body, and a magnet accommodation space into which the magnet is inserted may be recessed in the magnet mounting portion.

A supporting part may be formed inside the magnet accommodation space to support the magnet from the inside so that the magnet and the door sensing device maintain a set distance.

A plurality of reinforcing ribs protruding outward are formed on both side surfaces of the drawer body, and the outer side plate may be supported by the reinforcing ribs.

The reinforcing rib may be connected to an outer surface of the magnet mounting portion.

A magnetic force attenuating portion may be formed on the side of the magnet mounting portion, and a conductive metal member may be mounted on the magnetic force attenuating portion.

The conductive metal member is a screw, and a screw hole to which the screw is fastened may be formed in the magnetic force attenuating part.

The magnetic force attenuating portion may be formed to contact one side of the magnet mounting portion in a direction in which the door is closed.

A plurality of magnetic force attenuating units may be continuously arranged along a side surface of the magnet mounting unit.

A screw made of a metal material may be fastened to the rear of the magnet mounting portion to attenuate the magnetic force of the magnet.

A conductive metal member may be mounted on the side of the magnet mounting portion to include a magnetic force attenuating portion to attenuate the magnetic force of the magnet.

The conductive metal member may be a metal screw.

The magnetic force attenuating part may be disposed in a direction in which the door is retracted based on the magnet mounting part.

A plurality of magnetic force attenuating units may be provided in the vertical direction.

A pull-out motor connected to the pinion and providing power for pulling in and out of the door is provided at the bottom of the cabinet, and a pull-out rack to which the pinion is coupled and moved is provided on a lower surface of the door, and the control unit includes the When it is determined that the door is finely opened by the magnet sensing member, the door may be closed by driving the withdrawal motor.

The door unit may be provided with a driving device that provides power for driving the lifting device and is connected to the lifting device.

The lifting device may be provided inside the drawer part, and may be connected to the driving device through the front surface of the drawer part.

A refrigerator according to an embodiment of the present invention includes a cabinet including an inner case forming a storage space; A drawer-type door that opens and closes the storage space and is mounted to the cabinet to be retractable; A door gasket formed around a rear surface of the door, and sealing a space between the door and the cabinet when the door is closed; A magnet mounting portion formed on one of both side surfaces of the door and receiving a magnet; A door sensing device mounted on the inner case facing the magnet mounting portion when the door is closed, and sensing the magnet; A control unit connected to the door detection device; It includes an output means connected to the control unit, and when a magnet is not detected by the door detection device, the door open state may be output through the output means.

In the refrigerator according to the proposed embodiment, the following effects can be expected.

The refrigerator according to the embodiment of the present invention is provided with a lifting device on the door so that the user can store food without excessive bending of the waist, and the storage of heavy objects is further facilitated, so that a significant improvement in user convenience can be expected. .

In addition, a magnet is provided on the side of the door, and a door sensing device is provided on the inner surface of the cabinet to effectively detect that the door is slightly opened. In particular, since the door is provided with a lifting device so that the door can be accurately detected even when the weight of the door is increased, it is possible to prevent the door from maintaining a minutely open state.

In addition, when a micro-open condition of the door occurs, it is sensed and output through an output means so that the user recognizes it and manipulates the door again to close it. Accordingly, there is an advantage in that it is possible to prevent loss of cold air inside the storage space, as well as to prevent unnecessary increase in power consumption by preventing leakage of cold air.

Further, the magnet is formed on one of both sides of the main body of the door, and the door sensing device is mounted on an inner case forming the storage space, thereby preventing exposure of the magnet and the door sensing device to improve the appearance. have. In addition, by preventing the magnet and the door sensing device from being exposed to the outside, it is possible to prevent the magnet or the door sensing device from being damaged or separated.

In particular, the magnet may be mounted on a drawer body forming a drawer part of the door. In addition, an outer side plate is mounted on the drawer body to completely shield the magnet and the structure in which the magnet is mounted, so that the appearance can be further improved.

In addition, the magnet mounting portion for mounting the magnet to the drawer body may be molded together when the drawer body is formed of a plastic material, so that it may have a concise coupling structure and improve productivity unassembled workability.

In addition, a magnetic force attenuating portion is formed on one side of the magnet mounting portion to partially attenuate the magnetic force of the magnet. Accordingly, when the door is closed while sliding, the magnet is recognized before the door is completely closed, thereby preventing erroneous detection of the door in a closed state.

In particular, the door is heavy in weight and the door gasket is provided so that the door may not be completely closed in some cases, but the magnet is completely attenuated by maintaining the magnetic force of the magnet. By allowing the magnet to be sensed when positioned at a position facing each other, such erroneous detection can be fundamentally prevented.

In addition, when the door is automatically pulled in and out, the user may not feel that the door is completely closed, but there is an advantage of being able to effectively detect the minute opening of the door by the door detection device.

In addition, the door is configured to be automatically pulled in and out, and the control unit controls the door to close further by driving a pull-out motor when a fine opening of the door is detected to detect the minute opening of the door and then automatically close the door To be possible. Therefore, an effect that can further improve user convenience can be expected.

The magnetic force attenuating part is formed so that a metal member such as a screw can be mounted, and a simple structure can effectively weaken the magnetic force of the magnet. In addition, there is an advantage in that the magnetic force attenuating unit is disposed in a direction in which the door is closed, so that the door may be erroneously recognized as being closed immediately before the door is closed.

In addition, since the magnetic force attenuating part can also be integrally molded with the magnet mounting part, an effect of improving productivity may be expected.

1 is a front view of a refrigerator according to an embodiment of the present invention.
2 is a cross-sectional view schematically illustrating an elevated state of a drawer door of a refrigerator according to an exemplary embodiment of the present invention.
3 is a perspective view of the drawer door viewed from the rear.
4 is a view showing a state in which the basket and the lifting device are separated from the drawer door.
5 is an exploded perspective view of the drawer door as viewed from the front in which the drawer part and the door part are separated.
6 is a rear view of the door part.
7 is a rear perspective view of the door part with the door cover removed.
8 is a perspective view of the driving device and the lifting device connected to each other.
9 is a perspective view of the driving device.
10 is a perspective view showing the internal structure of the driving device.
11 is a partial enlarged view showing a structure in which power is transmitted to a screw of the driving device.
12 is an exploded perspective view of the drawer door.
13 is a perspective view of the drawer body of the drawer part.
14 is an enlarged view of portion A of FIG. 13.
15 is an exploded perspective view showing a coupling structure of a magnet mounting portion and a magnetic force attenuating portion formed on the drawer body.
16 is a partial perspective view showing a state in which a door detection device is mounted on an inner surface of a cabinet according to an embodiment of the present invention.
17 is an exploded perspective view showing a coupling structure of the door sensing device.
18 is a view showing an arrangement state of the magnet and the door detection device.
19 is a cross-sectional view of XIX-XIX' of FIG. 18.
20 is a perspective view of the lifting device.
21 is a view showing a state in which the upper frame of the lifting device is raised.
22 is a partially enlarged view showing a state in which the lifting device is coupled to the lever of the present invention.
23 is a perspective view of the drawer door in a closed state.
24 is a perspective view of the drawer door completely open.
25 is a cross-sectional view of the drawer door in a state in which the basket of the drawer door is completely lowered.
26 is a perspective view showing the state of the driving device and the lifting device in the state of FIG. 25;
27 is a cross-sectional view of the drawer door when the basket is fully raised.
28 is a perspective view showing the state of the driving device and the lifting device in the state of FIG. 27;
29 is a cross-sectional view showing the arrangement of the magnet and the door detection device when the drawer door is in a micro-open state.
30 is a view showing the action of the magnetic force attenuating member.
31 is a cross-sectional view showing a state in the middle of the drawer door being closed.
32 is a cross-sectional view showing a state in which the drawer door is completely closed
33 is a block diagram showing a control signal flow of a refrigerator according to an embodiment of the present invention.

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

In addition, in describing the constituent elements of the embodiment of the present invention, terms such as first, second, A, B, (a), (b) may be used. These terms are only used to distinguish 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 or connected to that other component, but another component between each component It should be understood that may be “connected”, “coupled” or “connected”.

1 is a front view of a refrigerator according to an embodiment of the present invention. And, FIG. 2 is a cross-sectional view schematically showing an elevated state of a drawer door of a refrigerator according to an embodiment of the present invention. And, Figure 3 is a perspective view of the drawer door viewed from the rear.

As shown, the refrigerator 1 may have an external shape by a cabinet 10 forming a storage space and a door 2 shielding the opened front surface of the cabinet 10.

The storage space inside the cabinet 10 may be divided into a plurality of spaces. For example, the upper space 11 of the cabinet 10 may be divided into a refrigerating chamber, and the lower space 12 may be divided into a freezing chamber. Of course, the upper space and the lower space may be divided into separate spaces maintained at different temperatures rather than a refrigerating compartment or a freezing compartment, and may be referred to as an upper space and a lower space.

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 drawing in/out. At least a portion of the lower space 12 may be divided up and down again by the barrier 13, and the drawer door 30 may include an upper drawer door 30a and a lower drawer door 30b.

In addition, the rotating 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 on the basis of a refrigerator in which the rotating door 20 and the drawer door 30 are disposed together, but the present invention is not limited thereto, and all types of refrigerators provided with a drawer-type door Will be applicable. In addition, the rotary door 20 may be provided at an upper portion and may be referred to as an upper door, and the drawer door 30 may be provided at a lower portion to be referred to as a lower door.

A display 21 may be provided on one front side of the rotating door 20, and the display 21 may include a structure of a liquid crystal display or an 88-segment structure.

In addition, when the exterior of the door 2 is formed of a metal material, the display 21 may be formed such that a plurality of fine holes are perforated to display information by transmitted light.

In addition, an operation unit 22 capable of operating automatic rotation or withdrawal of the upper door 2 or the lower door 2 may be provided on one side of the rotary door 20.

The manipulation unit 22 may be provided integrally with the display 21 and may be operated by a touch method or a button method. The manipulation unit 22 may input/operate a command for the overall operation of the refrigerator 1, and may operate the drawer door 30 to move in/out or to move the drawer door 30 up or down.

An operation unit 301 may also be provided on the drawer door 30. The operation unit 301 may be provided on one side of the lower drawer door 30b positioned at the bottom of the drawer doors 30, and the operation unit 301 may be configured in a touch or button manner. Of course, the manipulation unit 301 may be configured as a sensor that detects the user's proximity or movement, or may be configured to input manipulation by the user's motion or voice.

In addition, as shown in the drawing, a manipulation device 302 is provided at the bottom of the lower drawer door 30b to output a virtual switch by irradiating an image on the bottom surface and input manipulation in a manner that allows the user to approach the area. It could be configured.

In order to store food stored in the lower drawer door 30b, the lower drawer door 30b may be pulled forward, and then the basket 36 inside the lower drawer door 30b may be operated to move up and down.

Hereinafter, unless otherwise specified, the lower drawer door 30b will be referred to as a drawer door or door. In addition, the embodiment of the present invention is not limited to the number and shape of drawer doors, and may be applied to all refrigerators provided with a drawer-type door in a lower storage space.

The basket 36 may be accommodated in a form in which the door 30 can be elevated. The basket 36 may have a predetermined height. Since the basket 36 is seated in the lifting device 80 to be described later, when the lifting device 80 is raised, the height of the basket 36 may be added to the height of the lifting device 80 to be exposed to the outside. . Therefore, when the lifting device 80 is raised, it may be located at a point where it is very easy for a user to access the basket 36 or lift the basket 36.

The door 30 may be automatically pulled back and forth by a pull-out motor 14 and pinion 141 provided in the cabinet 10 and a pull-out rack 34 provided on the lower surface of the door 30. have.

In addition, the basket 36 inside the door 30 may be raised and lowered by the driving device 40 and the lifting device 80 provided in the lower drawer door 30b.

The door 30 may include a door part 31 for opening and closing the storage space, and a drawer part 32 that is coupled to the rear surface of the door part 31 and is pulled in and out with the door part 31. .

The door part 31 may be exposed to the outside of the cabinet 10 to form the exterior of the refrigerator 1, and the drawer part 32 is disposed inside the cabinet 10 to form a storage space. can do. In addition, the door portion 31 and the drawer portion 32 may be combined with each other to be withdrawn in and out of the front and rear directions.

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 basket 36 for storage is accommodated. The drawer part 32 may form an upper storage space, and the inner and outer surfaces of the drawer part 32 may be formed by a plurality of plates (391,392,393 in FIG. 12).

The plurality of plates 391, 392, 393 may be made of a metal material such as stainless steel, and are provided inside as well as outside of the drawer 32 so that the entire drawer 32 has a texture such as stainless steel or stainless steel. Can be formed.

In a state in which the door 30 is retracted, a machine room 3 in which a compressor and a condenser constituting a refrigeration cycle may be disposed behind the door 30. Accordingly, the rear part of the drawer part 32 may have an upper end protruding more than a lower end, and the rear part of the drawer part 32 may include an inclined surface 321.

In addition, draw-out rails (33 in FIG. 5) that can guide the draw-out of the door 30 may be provided on both side surfaces of the drawer part 32. The door 30 may be mounted to the cabinet 10 so as to be able to be withdrawn and inserted by the withdrawal rail 33. The lead-in/out rail 33 may be shielded by an outer side plate 391 so as not to be exposed to the outside. The draw-out rail 33 may be configured in a rail structure that can be extended in multiple stages.

A pull-out 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 with the drive of the draw-out motor 14 mounted on the cabinet 10 to enable automatic draw-out of the door 30. That is, when the operation unit 22 and 301 inputs an operation, the withdrawal motor 14 is driven so that the door 30 can be withdrawn according to the movement of the withdrawal rack 34. At this time, the door 30 can be stably pulled in and out by the pull-out rail 33.

Of course, the drawer part 32 may not be provided with a draw-out rack 34, and the user is configured to directly draw in/out the door 30 by holding and pushing or pulling one side of the door part 31. It will be possible.

Meanwhile, the inside of the drawer unit 32 may be divided into a front space (S1 in FIG. 25) and a rear space (S2 in FIG. 25). The front space S1 may include a lifting device 80 that is moved up and down, and a basket 36 that is seated in the lifting device 80 and lifted together with the lifting device 80.

In addition, when the door 30 is withdrawn, the entire drawer unit 32 cannot be pulled out of the storage space due to the restriction of the pulling distance of the door 30, and at least the front space S1 is It 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 withdrawal distance of the door 30 may be limited by the draw-out rack 34 or the draw-out rail 33, and the longer the draw-out distance is applied to the door 30 in the withdrawn state. This is because it is difficult to maintain a stable state due to an increase in the losing moment, and deformation or damage of the draw-out rail 33 or the draw-out rack 34 may be caused.

The inside of the front space (S1) is accommodated in the lifting device 80 and the basket 36, the lifting device 80 is raised in the vertical direction, food or basket 36 seated in the lifting device 80 ) Can be raised and lowered together. In addition, the lifting device 80 may be provided under the basket 36, and when the basket 36 is mounted, the lifting device 80 may be covered by the basket 36, and thus Any configuration of the lifting device 80 is not 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 partitioned by the drawer cover 37. When the drawer cover 37 is mounted, the front and upper surfaces of the rear space S2 are shielded so that the unused space is not exposed to the outside.

By attaching the drawer cover 37, the rear space S2 is covered when the door 30 is withdrawn, and only the front space S1 is exposed when the door 30 is pulled out, thereby providing a cleaner appearance. It will be able to provide. In addition, the remaining space except for the space in which the lifting device 80 and the basket 36 are mounted may be covered so that a problem such as a food dropping or a product being caught in a gap during lifting may not occur.

Meanwhile, a door light 318 may be provided on the rear surface of the door part 31. The door light 318 is to illuminate the inside of the drawer part 32, and may be positioned above the drawer part 32.

The door light 318 may be long disposed in the horizontal direction from the left to the right of the rear surface of the door 30. The light irradiated from the door light 318 is configured to face the inside of the door 30, particularly the drawer 32, and the drawer 32 when the door 30 is pulled out and opened Will reveal the inside of.

Hereinafter, the coupling structure of the door 30 will be described in more detail with reference to the drawings.

4 is a view showing a state in which the basket and the lifting device are separated from the drawer door. 5 is an exploded perspective view of the drawer door as viewed from the front when the drawer part and the door part are separated.

As shown in the drawing, a lifting device is disposed inside the drawer part 32, and a basket 36 may be seated on the upper surface of the lifting device 80. The basket 36 may be simply lifted from the drawer as needed, and may be lifted together according to the lifting of the lifting device 80.

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

The appearance of the inner and outer surfaces of the drawer unit 32 may be formed by plates 391, 392, and 393, and shield components mounted on the drawer unit 32 so that the outer and inner appearances can be clearly seen. can do. The plates 391, 392, and 393 may be formed in plural, 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 door 30 may have a structure that can be separated and coupled to each other. Assembly workability and serviceability may be improved through the detachable 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 coupled to each other, and when the door part 31 and the drawer part 32 are combined, the power for lifting the lifting device 80 It can be configured to provide.

The driving device 40 for lifting the lifting device 80 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 40 provided in the door part 31 may include components operated by input of power and components for transmitting power to the lifting device 80. Accordingly, when the service of the driving device 40 is required, the door part 31 can be separated to take action, and only the door part 31 can be replaced to take a simple action.

The door part 31 and the drawer part 32 may be coupled by a pair of door frames 316 provided on both sides. The door frame 316 may be configured to be connected to the rear surface of the door part 31 and both sides of the drawer part 32, respectively.

Further, the draw-out rails 22 may be provided at lower ends of both sides of the drawer part 32 to which the door frame 316 is coupled. In addition, a rail bracket 331 is provided on the draw-out rail 33, and the rail bracket 331 may extend from one side of the draw-out rail 33 to both sides of the drawer part 32. In addition, the rail bracket 331 may be fixedly coupled to the interior wall of the cabinet. Accordingly, the drawer unit 32, that is, the door 30 may be mounted to the cabinet 10 so as to be retractable by the draw-out rail 33.

When the door part 31 and the drawer part 32 are combined, a part of the lifting device 80 is exposed on the front of the drawer part 32 so that the driving device 40 and the lifting device 80 can be connected. A drawer opening 35 may be formed.

A scissor-side connection part 842, which is a rotation axis of the lifting device 80, may be exposed inside the drawer opening 35. Accordingly, when the scissor side connection part 842 is connected to the driving device 40, the lifting device 80 may be in an operable state.

In addition, the drawer openings 35 may be formed at both front and left ends of the left and right drawer portions 32. In addition, between the drawer openings 35, a plurality of exhaust holes 381 may be formed to allow air to flow inside and outside the drawer part 32. The exhaust hole 381 may be formed lower than the height of the lifting device 80, and thus, the drawer opening 35 and the exhaust hole 381 may be covered when the lifting device 80 is mounted. .

On the other hand, the lifting device 80 has a structure that can be separated from the drawer 32 according to the user's operation. At this time, the scissor side connection part 842 of the lifting device 80 connected to each other and the lever side connection part 422 of the driving device 40 are first separated, and then the lifting device 80 is removed from the drawer part 32. Will be lifted.

6 is a rear view of the door part. And, Figure 7 is a rear perspective view of the door portion of the door cover removed. And, Figure 8 is a perspective view of the driving device and the lifting device are connected to each other.

As shown, a driving device 40 for operating 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 buried in the heat insulating material, but is provided inside the space formed by the door liner 314, and the door cover 315 It may be configured so as not to be exposed to the outside by being shielded by.

In addition, the door liner 314 is formed in a shape corresponding to the shape of the driving device 40 and the door light 318 to provide a space in which the driving device 80 and the door light 318 are mounted. I can.

Meanwhile, cover openings 315a may be formed at both sides of the lower end of the door cover 315. The cover opening 315a is formed so that the lever-side connection part 422 of the lever 42, which is a component of the driving device 40, is exposed, and has a size that does not interfere with rotation of the lever 42 Can be.

In addition, the lever-side connection part 422 may be positioned at a position where the cover opening 315a faces the drawer opening 35. Therefore, when the door part 31 and the drawer part 32 are combined, the cover opening 315a and the drawer opening 35 can communicate with each other, and thus, the cover opening 315a and the drawer opening Through 35, the lever-side connection part 422 and the scissor-side connection part 842 of the lifting device 80 may be coupled.

On the other hand, in the center of the lower end of the door cover 315, a cable hole 315b through which cables connected to electric components such as the driving device 40 provided in the door part 31 and the door light 318 enter and exit is further provided. Can be formed. Wires entering and leaving through the cable hole 315e may pass under the drawer 32 and be connected to the cabinet 10.

A door gasket 317 may be provided along the rear circumference of the door part 31, and when the door 30 is closed, the door gasket 317 may be sealed in contact with the front of the cabinet 10. have.

The driving device 40 may be shielded by the door cover 315 and disposed inside the door part 31. The driving device 40 is connected to the lifting device 80, and 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 is not inclined or biased to one side under any circumstances, and the left and right sides are horizontally elevated and lowered. You can do it.

The driving device 40 includes a motor assembly 60, a pair of screw units 50 disposed on both sides of the motor assembly 60, and a pair of levers connected to each of the screw units 50 (42) may be included. In addition, the screw unit 50 may include a screw 52 and a screw holder 56 which is penetrated by the screw 52 and is raised and lowered along the screw unit 50.

Meanwhile, the lever 42 has a lever-side connection part 422 formed at one end of the lever extension part 421, and the lever-side connection part 422 is rotatably fixed to the rear surface of the door part 31. Further, a lever hole 423 through which the holder fastening member 564 is fastened may be formed at the other end of the lever extension 421.

The lever hole 423 is formed in a long hole shape, guides the movement of the holder fastening member 564, and allows the holder fastening member 564 to be fastened to the screw holder 56 at the same time. Accordingly, the lever 42 is rotated by the screw holder 56 that is raised and lowered when the screw 52 is rotated. The driving device 40 will be described in more detail below.

Hereinafter, the driving device 40 will be described in more detail with reference to the drawings.

9 is a perspective view of the driving device. And, Figure 10 is a perspective view showing the internal structure of the driving device. And, Figure 11 is a partial enlarged view showing a structure in which power is transmitted to the screw of the driving device.

As shown, the motor assembly 60 may be located in the center portion in the left and right direction of the door portion 31. Further, it may be configured to enable the operation of the screw units 50 and 50a and the lever 42 on both sides by driving the motor assembly 60 including one driving motor 64.

Particularly, the motor assembly 60 may adjust the amount of deceleration and transmitted force through a combination of a plurality of gears.

In addition, the motor assembly 60 has a structure in which the drive motor 64 and gears are arranged vertically in order to minimize a space that is depressed when mounted on the door part 31, and in particular, the motor assembly 60 It may be formed to widen the width in the left and right directions to minimize the thickness of the material and to minimize the thickness in the front and rear directions.

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

The drive motor 64 provides power for the lifting of the lifting device 80 and may be configured to rotate forward and backward. Accordingly, when the lifting signal of the lifting device 80 is input, it is rotated forward and backward, thereby providing power for lifting the lifting device 80. In addition, the drive motor 64 may be stopped when a load of the driving motor 64 or a stop signal is input by detection of a sensor.

The motor assembly 60 includes a motor case 61 in which the driving motor 64 is installed, and a motor cover 62 coupled to the motor case 61 and covering the driving motor 64. I can.

The rotation axis of the drive 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 the power of the driving motor 64. The power transmission unit may be located on the opposite side of the driving motor 64 with respect to the motor case 61.

In addition, 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 drive motor 64.

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

The first transmission gear 652 may be, for example, a multi-stage gear. As an example, the first transmission gear 652 includes a first gear 652a meshed with the driving gear 651 and a second gear 652b having a diameter smaller than that of the first gear 652a. Can include. 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 meshing with the first transmission gear 652. The second transmission gear 653 may mesh with the first transmission gear 652 from a lower side of the first transmission gear 652. The second transmission gear 653 includes a first gear 653a meshing with the second gear 652a of the first transmission gear 652, and a first gear having a larger diameter than the first gear 653a. It may include 2 gears 653b.

Each of the first gear 653a and the second gear 653b of the second transmission gear 653 may be a spur gear. In addition, the second gear 653b of the second transmission gear 653 may be located below the first gear 652a of the first transmission gear 652. Accordingly, an increase in the front and rear width of the driving device 60 can be prevented by the first transmission gear 652 and the second transmission gear 653.

The power transmission unit may further include a third transmission gear 654 meshed with the second transmission gear 653. The third transmission gear 654 may mesh with the second gear 653b under the second gear 653b of the second transmission gear 653. The third transmission gear 654 may be a spur gear. A portion of the third transmission gear 654 may be disposed to overlap the second transmission gear 653 in the front-rear direction.

A gear shaft for rotatably supporting the plurality of transmission gears may be provided in the motor case 61.

The power transmission unit may include a pair of cross gears 655 and 656 meshed with the third transmission gear 654. The pair of crossover gears 655 and 656 are arranged to be spaced apart from each other in the left and right direction, and the rotation center is lower than the rotation center of the third transmission gear 654 to be meshed with the third transmission gear 654. have.

Each of the crossed gears (655, 656) is a spur gear (655a, 656a) and a helical gear form so that the cross gears (655, 656) can mesh with the third transmission gear (654). It may include first helical gear units 655b and 656b.

In addition, the rotation center lines of the cross gears 655 and 656 spaced apart from each other may extend horizontally to each other.

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

The second helical gear parts 657 and 657a may mesh with the first helical gear parts 655b and 656b. The rotation center lines of the second helical gear units 657 and 657a may be disposed to cross the rotation center lines of the cross gears 655 and 656. Accordingly, the first helical gear units 655b and 656b and the second helical gear units 657 and 657a are intersected with each other, and may be configured to be engaged with each other to transmit rotation.

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

As described above, the use of a pair of crossed helical gears has the advantage that the power transmission direction can be easily switched and the structure for power transmission becomes compact. In particular, even when a large force is transmitted for the lifting of the lifting device 80, a large noise is not 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 of the inside of the door part (31), and the pair of screw units (50, 50a) differ only in their mounting positions, and their structure and shape Are the same.

Power of the driving motor 64 may be transmitted from the lower side 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 positioned on both sides, and the screw units 50 and 50a disposed on both sides are the distance between the top and bottom. 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 power from the driving motor 64. The screws 52 and 52a may be inclined to extend in a vertical direction, with an upper end facing the outside and a lower end facing the outside.

The screws 52 and 52a may be connected to the second helical gear units 657 and 657a. That is, the screws 52 and 52a may be rotated together when the second helical gear units 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 left and right sides with respect to the motor assembly 60, and may be disposed obliquely on the same center line as the center line of the second helical gear units 657 and 657a. . Accordingly, the screws 52 and 52a on both sides of the left and right sides have an arrangement that is farther away from each other as it goes upward.

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 vertically along the screws 52 and 52a when the screws 52 and 52a are rotated. In addition, 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 in the center of the screw holders 56 and 56a. The holder through-hole 561 is formed to pass through the screw holders 56 and 56a, and is inserted and mounted so that the screws 52 and 52a pass through the holder through-hole 561. A thread coupled to the screw may be formed on the inner side 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 on both left and right sides of the holder penetrating portion 561. The guide hole 562 is a portion through which the guide bars 53 and 54 to be described below pass, and the screw holders 56 and 56a may be moved along the guide bars 53 and 54.

The guide bars 53 and 54 may be formed in a round bar shape, and may be formed of a metal material to stably support the screw holders 56 and 56a.

A bearing is provided on the inner surface of the guide hole 562 to facilitate the movement of the screw holders 56 and 56a. Further, although not shown in detail, a sleeve-shaped lubricating member may be provided in the guide hole 562 through the guide bars 53 and 54. The lubricating member may be formed of engineering plastic or a material that reduces friction, thus making it easier to move the screw holders 56 and 56a and preventing noise from being generated. Of course, if necessary, the screw holders 56 and 56a themselves may be formed of an engineering plastic material.

Since a pair of the 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 a stable lift is possible. In particular, stable lifting is possible even in a situation where 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. As an 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 located at the lowest or upper end of the screws 52, 52a, a lift detection device to be described below. 90 will be able to detect this. That is, whether the magnet 563 mounted on the screw holder 56a is sensed, it is possible to determine the completion of the ascending and descending of the lifting device.

Further, although not shown in detail, a holder connector 562 may be mounted on the opposite side of the rear surface of the screw holder 56a on which the magnet 563 is provided, that is, the front surface of the screw holder.

The holder connector 562 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 562 may be coupled to the screw holders 56 and 56a while passing through the lever 42. The lever 42 may include a rectangular slot 426 so that the holder connector 562 does not interfere with the rotation of the lever 42.

Since the screw units 50 and 50a are disposed on both left and right sides, extension lines of the screws 52 and 52a on both left and right sides may cross 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 screws 52 and 52a and screw holders 56 and 56a can be accommodated, and is opened. The portion may be shielded by a cover member 66 to be described later.

The housing 51 may be formed by bending a plate-shaped metal material or may be formed of a plastic material.

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

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

Part of the crossover gears 655 and 656 may be accommodated in the second accommodating part 512. That is, the crossover gears 655 and 656 and the second helical gear parts 657 and 657a may be connected within the second receiving part 512.

The lower side of the screw 52, 52a penetrates the partition wall 513, and the second helical gear portions 657, 657a are coupled to the screws 52, 52a that have penetrated the partition wall 513 do.

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

A plurality of guide bars (53, 54) are provided in the housing (51) so that the screw holders (56, 56a) are not inclined to either right or left around the screws (52, 52a), the plurality of guides The screw 52 may be positioned 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 unit, and is fastened to the pair of housings 51, the screw 52, 52a, the guide bar 53, 54), the screw holders 56 and 56a can be covered.

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 independently.

In the present embodiment, since the driving device 40 exists in the form of a single module, the driving device 40 is compact, so that the driving device 40 can be easily installed on the door part 31.

In addition, since a single cover member 66 covers the motor case 61 and the pair of housings 51 together, when the cover member 66 is separated, it is easily placed inside the power transmission unit or the housing 51. There is an advantage of being able to access, and service is easy.

Meanwhile, a lift detection device 90 may be provided in the screw unit 50a on one side of the screw units 50 and 50a on both left and right sides. The elevating detection device 90 is for determining whether the elevating device 80 has been elevated or not, and determines whether the elevating apparatus 80 has elevated or descended based on the operation of the driving device 40.

The lift detection device 90 may be mounted on the cover member 66 and may be vertically disposed along the screw unit 50a.

The lift detection device 90 may include a pair of detection sensors 92 and 93. As the detection sensors 92 and 93, a sensor that detects the magnet 563 may be used. The detection sensor may be a Hall sensor that detects the position of a magnet. Of course, other sensors or devices for sensing the magnet 563 may be provided in place of the Hall sensor as needed.

Hereinafter, the structure of the drawer part 32 will be described.

12 is an exploded perspective view of the drawer door. And, Figure 13 is a perspective view of the drawer body of the drawer.

As shown, the drawer part 32 is provided on the inside of the drawer body 38 and the drawer body 38 forming the overall shape of the drawer part 32, the basket 36 and the food It may include a lifting device 80 capable of lifting and descending and a plurality of plates 391, 392, and 393 forming the inner exterior of the drawer part 32.

In detail, the drawer body 38 may be injection formed of a plastic material, and forms the overall shape of the drawer part 32. The drawer body 38 has a basket shape with an open top surface to form a food storage space 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 mounted on both sides of the lower surface of the drawer part 32 or on the rail mounting part 382 together with the draw-out rail 33. In a state in which the door frame 316 is coupled to the drawer unit 32, the drawer unit 32 and the door unit 31 may be integrally coupled to each other so that the drawer unit 32 and the door unit 31 are combined with each other.

Rail mounting portions 382 on which draw-out rails 33 for guiding the draw-out 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 a front end to a rear end, and a space may be formed therein to accommodate the draw-out rail 33.

Meanwhile, an air hole 383 is formed in the front surface of the drawer body 38 and in the front plate so that cold air is introduced into the drawer part 32, and an exhaust hole so that cold air inside the drawer part flows out. (381) can be formed. Accordingly, cold air may be smoothly circulated inside the drawer without stagnating.

In addition, drawer openings 35 may be formed at both ends of the lower front side of the drawer part 32. The drawer opening 35 is located at a position facing the cover opening 315a and may be formed in a shape corresponding to the cover opening 315a.

Both the exhaust hole 381 and the drawer opening 35 may be formed at a position lower than the upper end of the lifting device 80. That is, the exhaust hole 381 and the drawer opening 35 may be covered by the lifting device 80. Accordingly, even when the basket 36 is removed by the lifting device 80, the exhaust hole 381 and the drawer opening 35 are not exposed to the inside of the drawer part 32.

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 direction. The reinforcing rib 384 increases the strength of the drawer body 38 itself so that the drawer body 38 is more resistant to the weight of the door increased by the provision of the driving device 40 and the lifting device 80. It can be made to keep its shape firmly.

In addition, the reinforcing ribs 384 may support the outer side plates 391 mounted on both side surfaces, and thus, the appearance of the drawer part 32 may be maintained firmly.

In addition, a magnet mounting portion 385 on which a magnet 387 is mounted and a magnetic force attenuating portion 386 may be formed on one of the left and right sides of the drawer body 38. The magnet mounting part 385 and the magnetic force attenuating part 386 are components for detecting the minute opening of the door 30. The structure of the magnet mounting portion 385 and the magnetic force attenuating portion 386 will be described in more detail below.

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

In detail, outer side plates 391 may be provided on both left and right side surfaces outside the drawer body 38. The outer side plates 391 are mounted on both left and right sides of the drawer body 38 to form the exterior of both sides, and in particular, the door frame 316 and the draw-out rails mounted on both sides of the drawer body 38 ( 33) It can be prevented from being exposed to the outside.

The upper end of the outer side plate 391 is bent inward, and may be seated on the side stepped portions 386 recessed at the upper ends of both side surfaces of the drawer body 38. Thus, it is possible to stably fix the outer side plate 391.

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

A front plate 393 may be provided on an inner front surface of the drawer body 38. The front plate 393 may form an inner front surface of the drawer body 38. In addition, a plurality of air holes may be uniformly formed as a whole in the front plate 393.

The entire inner surface of the drawer body 38 may be formed by the inner side plate 392 and the front plate 393, and the inner surface of the drawer body 38 may provide a metallic texture.

Therefore, the storage space inside the drawer 32 may have a metallic texture as a whole, and the food stored therein can be stored coldly in a more even area as a whole, as well as visually excellent cooling performance and storage performance for the user. Can provide.

The drawer cover 37 is bent at the upper end of the cover front part 371 and the cover front part 371 partitioning 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 shielding 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 may be exposed inside the drawer body 38, and the rear space S2 is the drawer. It can be shielded by the cover 37.

An elevating device 80 may be provided inside the drawer body 38. The lifting device 80 has a structure that is connected to the driving device 40 so as to be able to move up and down, and both left and right sides may be raised and lowered uniformly.

The elevating device 80 may be configured as a scissor type and may be folded in a lowered state and unfolded in an elevated state so that the basket 36 or food seated on the upper surface may 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 basket 36 or a surface on which food is seated.

Meanwhile, the height of the drawer opening 35 may be located at a position lower than the upper end of the lifting device 80, that is, the upper surface of the support plate 81. Accordingly, in the state in which the lifting device 80 is mounted, it is possible to prevent the drawer opening 35 from being visible to the inside of 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 matters from penetrating into the lifting device 80 provided below the front space S1, and the lifting device 80 By blocking access to ), safety accidents can be fundamentally prevented.

Hereinafter, the structure of the magnet mounting portion 385 and the magnetic force attenuating portion 386 will be described in more detail.

14 is an enlarged view of portion A of FIG. 13. And, Figure 15 is an exploded perspective view showing the coupling structure of the magnet mounting portion and the magnetic force attenuating portion formed in the drawer body.

As shown in the drawing, the magnet mounting portion 385 may be formed on one of the left and right sides of the drawer body 38. The magnet mounting portion 385 is mounted to detect the minute opening of the door 30, and may provide a magnet accommodation space 385a corresponding to the magnet 387.

The magnet mounting portion 385 may be integrally formed when the drawer body 38 is formed of a plastic material. In addition, the magnet mounting portion 385 may be configured to be connected to a reinforcing rib 384 formed in the drawer body 38.

The magnet mounting part 385 may protrude outward from a side surface of the drawer body 38. In addition, a magnet accommodation space 385a in which the magnet is accommodated may be opened on the protruding outer surface. The magnet accommodation space 385a is formed to have the same size as the magnet 387 so that the magnet 387 can be inserted.

In addition, a supporting part 385b for supporting the magnet 387 may be formed inside the magnet accommodation space 385a. The supporting part 385b may be formed in a shape in which a plurality of ribs intersect, and entirely supports one surface of the magnet 387 to maintain the position of the magnet 387. Accordingly, the magnet 387 does not change its position while being mounted on the magnet mounting part 385 and maintains a set distance with the door sensing device 125.

Meanwhile, a magnetic force attenuating part 386 may be formed on one side of the magnet mounting part 385. The magnetic force attenuating part 386 allows a conductive metal material to attenuate the magnetic force of the magnet 387 to be mounted. The magnetic force attenuating part 386 may also be integrally formed when the drawer body 38 is molded, like the magnet mounting part 385. That is, when the drawer body 38 is formed, the magnet mounting portion 385 and the magnetic force attenuating portion 386 may be formed at once.

The magnetic force attenuating part 386 may be formed on one of left and right sides based on the magnet mounting part 385. In detail, the magnetic force attenuating part 386 may be disposed in a direction in which the door 30 is retracted, that is, at the rear of both sides of the magnet mounting part 385.

The magnetic force attenuating part 386 is formed in a cylindrical shape such as a boss, and may protrude from the drawer body 38. In addition, the magnetic force attenuating part 386 may protrude to contact one side of the magnet mounting part 385.

A mounting hole 386a may be formed at a protruding end of the magnetic force attenuating part 386, and a conductive metal member 388 may be mounted in the mounting hole 386a. The conductive metal member 388 is disposed on the side of the magnet 387, and is positioned in the magnetic field M of the magnet as shown in FIG. 30 to influence the magnetic force of the magnet 387 so that the magnet 387 is The magnetic force to be recognized by the door sensing device 125 may be weakened.

That is, the door detection device 125 can detect the magnet 387 only at the exact position where the magnet 387 is completely coincident with the door detection device 125, so that the door 30 is slightly opened. In a situation, it is possible to prevent false detection of the door 30 as being closed.

The conductive metal member 388 may be a screw 388 made of a metal material. That is, by fastening the screw 388 to the mounting hole 386a of the magnetic force attenuating part 386, the magnetic force of the magnet 387 may be attenuated.

Further, the magnetic force attenuating part 386 may be formed in a plurality of vertically along one surface of the magnet mounting part 385. That is, when a plurality of magnetic force attenuating portions 386 are formed and a plurality of screws 388 are fastened, the magnetic force of the magnet 387 may be further weakened.

On the other hand, the side of the drawer body 38 on which the magnet mounting portion 385 and the magnetic force attenuating portion 386 are formed may be shielded by the outer side plate 391, and thus the magnet mounting portion 385 and the magnetic force The attenuating part 386 is also not exposed to the outside and can be covered by the outer side plate 391.

Hereinafter, a door sensing device 125 for sensing the magnet 387 will be described in more detail with reference to the drawings.

16 is a partial perspective view showing a state in which a door detection device is mounted on an inner surface of a cabinet according to an embodiment of the present invention. And, FIG. 17 is an exploded perspective view showing a coupling structure of the door sensing device. And, FIG. 18 is a diagram showing an arrangement state of the magnet and the door detection device. And, FIG. 19 is a cross-sectional view of XIX-XIX' of FIG. 18.

As shown, the storage space 12 may be formed by an inner case 102 forming an inner surface of the cabinet 10. The inner case 102 may be formed of a resin material, and provides an inner shape of the storage space 12 and a shape in which components provided in the storage space 12 can be mounted.

A pipe guide groove 122 connecting between the barrier 13 and the machine room 3 may be formed on one side of the inner case 102. In the pipe guide groove 122, a part of the refrigerant pipe inside the machine room 3 may be guided toward the inside of the barrier 13 or an inner front end of the cabinet 10. The refrigerant pipe guided along the pipe guide groove 122 is a hot gas pipe 123 so that a high-temperature refrigerant is bypassed and guided. The front end of the barrier 13 and the cabinet 10 may be heated by the hot gas pipe 123, and condensation may be prevented from occurring at the front end of the barrier 13 and the cabinet 10.

Meanwhile, a sensing device hole 124 may be formed below the pipe guide groove 122. The sensing device hole 124 is to which the door sensing device 125 is mounted, and may be formed at a position exactly corresponding to the position of the magnet 387 when the door 30 is completely closed.

The sensing device hole 124 may be opened to penetrate the inner case 102. Further, a sensing device mounting portion 124a formed to be stepped may be formed inside the sensing device hole 124. The exposed part 125b of the door sensing device 125 may be mounted on the sensing device mounting part 124a, and supports the periphery of the exposed part 125b.

Further, when the door sensing device 125 is inserted into the sensing device hole 124 and mounted, only the exposed portion 125b is exposed to the outside through the sensing device hole 124. In addition, the sensing device seating portion 124a may be formed to be stepped by a corresponding depth so that the outer surface of the exposed portion 125b and the inner surface of the inner case 102 form the same plane.

Meanwhile, the door sensing device 125 may be inserted into the sensing device hole 124 from the inside of the storage space 12 and may be fixedly mounted to the inner case 102. The door detection device 125 may include a sensor case 125e in which the detection sensor 125a is accommodated as a whole, and an exposed portion 125b may be formed on the front surface of the sensor case 125e. A sensor receiving portion 125f for accommodating the detection sensor 125a is formed inside the sensor case 125e, and the exposed portion 125b may shield the sensor receiving portion 125f. The position of the detection sensor 125a may correspond to an inner side of the sensor receiving part 125f, that is, a center of the exposed part 125b.

In addition, the exposed portions 125b may be disposed to face each other at a position corresponding to the position of the magnet 387. In addition, the exposed portion 125b may be formed to be the same as or somewhat larger in size than the magnet 387. Accordingly, the detection sensor 125a may be positioned at a position facing the magnet 387.

In addition, case fixing portions 125c may be formed on both sides of the sensor case 125e. The case fixing part 125c may be formed to be inclined and may be elastically deformable. Accordingly, it is possible to facilitate the insertion of the sensor case 125e through the sensing device hole 124, and when the door sensing device 125 is completely inserted into the sensing device hole 124, the case The top portion 125c may be caught and constrained outside the sensing device hole 124. In this state, the exposed portion 125b may be fixed in close contact with the inside of the sensing device hole 124.

Therefore, when the door 30 is completely closed as shown in FIG. 18, the door sensing device 125 mounted on the inner case 102 is mounted on the magnet mounting portion 385 of the drawer 32 The magnetic force of the magnet 387 may be attenuated to a set size so that the magnet 387 can be detected by the detection sensor 125a only in this state, and the door (30) can be recognized as completely closed.

The operation of the door sensing device 125 will be described in more detail below.

Hereinafter, the structure of the lifting device 80 will be described in detail with reference to the drawings.

20 is a perspective view of the lifting device. And. 21 is a view showing a state in which the upper frame of the lifting device is raised. And, Figure 22 is a partial enlarged view showing a state in which the lifting device is coupled to the lever of the present invention.

As shown, the lifting device 80 may be provided on the bottom of the inner side of the drawer part 32, and may be detachably provided on the inside of 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 may 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 basket 36 together with the support plate 81.

The upper frame 82 may include a frame portion 821 forming a circumferential shape of the upper frame 82 as a whole, and a partition portion 822 partitioning the space inside the frame portion 821 into left and right sides. I can.

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. Accordingly, 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 to increase strength and prevent deformation.

Further, a slide guide 824 for guiding the movement of the scissor assembly 84 may be formed on the lower side of the frame part 821 by receiving the end of the scissor assembly 84.

The scissor assembly 84 may be disposed in the spaces 823 and 824 on both sides of the partition 822, respectively.

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

The lower frame 83 may have the same or similar structure to the upper frame 82 only in a direction different from that of 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 to 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 pass. Accordingly, 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 both sides of the scissor assembly 84 operate by receiving power from one driving motor 64, so that it can be raised and lowered by the same height at the same time.

Therefore, even when supporting a heavy load, it can be effectively lifted and lowered by a pair of the scissors assembly 84, which is independently applied to both sides, and at this time, the scissors 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 rectangular frame rotatably connected to the first scissor frame 841. have.

The left and right widths of the second scissor frame 845 may be smaller than the left and right widths of the first scissor frame 841. Accordingly, the second scissor frame 845 may be connected to the first scissor frame 841 while being positioned within an area formed by the first scissor frame 841.

The first scissor frame 841 may include a lower shaft 841a and an upper shaft 841b extending in a horizontal direction. The lower shaft 841a is rotatably supported by the lower frame 83, and the upper shaft 841b is disposed to pass through the sliding guide 824 of the upper frame 82.

The first scissor frame 841 may be connected to a first rod 841a extending in a vertical direction and an upper shaft 841b.

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. I can.

The first scissor frame 841 may include a scissor-side connecting portion 842 protruding to be connected to the lever 42. The scissor side connection part 842 is formed at an end of the extension part 842b extending from the first scissor frame 841 and the extension part 842b, and has a shape corresponding to the receiving space 422c. (842c) may be included.

The lever 42 may include a lever-side connecting portion 422 for receiving the scissor-side connecting portion 842 for coupling with the scissor-side connecting portion 842. The scissor side connection part 842 may be formed in a shape corresponding to the receiving space 422c of the lever side connection part 422. That is, the scissor-side connection portion 842 may be formed in a shape extending from a circular axis of rotation to one side, and may be formed in a shape corresponding to the rotation boss portion 422b and the lever-side protrusion 422a.

That is, the end of the scissor side connection portion 842 may be formed in a non-circular shape. Therefore, when the lever 42 is rotated while the scissor side connection part 842 is accommodated in the lever side connection part 422, the lever 42 is prevented from spinning with the scissors side connection part 842 Can be. In addition, the scissor side connection part 842 can transmit a greater force for the operation of the lifting device 80.

Hereinafter, a state in which the door 30 of the refrigerator 1 according to an embodiment of the present invention having the above structure is pulled out and moved up and down will be described in more detail with reference to the drawings.

23 is a perspective view of the drawer door in a closed state.

As illustrated, in the refrigerator 1, in the food storage state, both the rotary door 20 and the door 30 are kept closed. In this state, the user can store food by pulling out the door 30.

The door 30 may be provided with a plurality of upper and lower, and may be opened and extended by a user's manipulation.

At this time, the user's operation can be operated by touching the rotating door 20 or the operation unit 301 provided on the front of the door 30, and opening by the operation device 302 provided at the bottom of the door 30 Input of manipulation may be possible.

In addition, the operation unit 301 and the operation device 302 may be configured to individually operate the withdrawal of the door 30 and the lifting and lowering of the lifting device 80, respectively. Of course, it will also be possible for the user to hold the handle of the door 30 and open it.

And, hereinafter, the opening and elevation of the lower drawer door 30b among the doors 30 disposed in the upper and lower directions is described for example, but both the upper and lower doors 30 are withdrawn in the same manner. It will be able to be elevated.

24 is a perspective view of the drawer door completely open. And, Figure 25 is a cross-sectional view of the drawer door in a state in which the basket of the drawer door is completely lowered. And, Figure 26 is a perspective view showing the state of the driving device and the lifting device in the state of Figure 25.

As shown, the lower drawer door 30b is pulled forward according to the user's pulling out operation of the lower drawer door 30b. The lower drawer door 30b may be pulled out while the pull-out rail 33 is extended.

On the other hand, the lower drawer door 30b may be configured not to be opened by pulling directly by a user, but to be withdrawn by driving the withdrawal motor 14.

The draw-out rack 34 provided on the bottom surface of the lower drawer door 30b may be coupled with a pinion gear 141 that is rotated when the draw-out motor 14 provided in the cabinet 10 is driven, and thus The lower drawer door 30b is pulled in and out as the pull-out motor 14 is driven.

The draw-out distance of the lower drawer door 30b may be extended to at least a distance at which the front space S1 inside the drawer part 32 can be completely exposed to the outside. Accordingly, in such a state, when the lifting device 80 is elevated, the basket 36 or the food is not interfered with the doors 20 and 30 or the cabinet 10 disposed above.

In this case, the draw-out distance of the lower drawer door 30b may be determined by the draw-out detection device 15 disposed on the cabinet 10 and/or the lower drawer door 30b.

The in/out detection device 15 may be configured as a detection sensor that detects a magnet 389 so that the lower drawer door 30b is completely pulled out or closed.

For example, as shown, a magnet 389 may be provided on the bottom of the drawer 32 and a detection sensor may be provided on the cabinet 10. The withdrawal detection device 15 corresponds to the position of the magnet 389 when the lower drawer door 30b is closed and the position of the magnet 389 when the lower drawer door 30b is completely withdrawn. It can be provided in a position. Accordingly, it is possible to determine the state of the drawing in and out of the lower drawer door 30b by the drawing in/out detecting device 15.

In addition, if necessary, a switch is provided at a position where the lower drawer door 30b is completely retracted and a position at which the lower drawer door 30b is completely retracted, so that the lower drawer door 30b may be sensed withdrawal and retracted, and the withdrawal motor 14 rotates. The number may be counted, or the withdrawal of the lower drawer door 30b may be detected by a sensor measuring a distance between the rear surface of the door 31 and the front end of the cabinet 10.

When the lower drawer door 30b is completely withdrawn, the driving motor 64 is driven to operate the lifting device 80. The lifting device 80 may be configured to operate in a situation in which the lower drawer door 30b is sufficiently pulled out to ensure safe lifting of the food or basket 36 seated in the lifting device 80.

That is, when the lower drawer door (30b) is pulled out and the front space (S1) is completely exposed to the outside, the lifting device 80 is operated and the basket 36 seated in the lifting device 80 or stored It is possible to prevent food from interfering with the other doors 20 and 30 or the cabinet 10.

Looking in more detail at the state in which the lower drawer door 30b is pulled out, when the lower drawer door 30b is pulled out for lifting, the front space S1 is completely outside the lower storage space 12. Must be withdrawn.

In particular, the rear end (L1) of the front space (S1) must be in a state that is more pulled out than the front end (L2) of the cabinet 10 or the upper door 20, and prevent interference when the lifting device 80 is elevated. In order to prevent it, it must be located in front of the cabinet 10 or the front end L2 of the upper door 20 at least.

In addition, when the lifting device 80 is pulled out to be driven, the entire drawer 32 is not completely pulled out and, as shown in FIG. 25, only to a position to avoid interference during lifting of the lifting device 80. Can be withdrawn. At this time, at least a portion of the rear space S2 of the drawer 32 is located inside the lower storage space 12. That is, the rear end L3 of the drawer part 32 is positioned at least inside the lower storage space 12.

Therefore, even when the weight of the lower drawer door 30b including the driving device 40 and the lifting device 80 is added to the weight of the storage object, the draw-out rail 33 or the lower drawer door 30b ) It is possible to ensure stable withdrawal and lifting operation without sagging or damage of itself.

Before the lifting device 80 is raised, the lever 42 and the screw holder are located in the lowest position. The lifting detection device 90 detects this and determines that the current state is a state in which the lifting device 80 is completely lowered.

When it is determined that the lifting device 80 is in a completely lowered state by the lifting detection device 90, the driving device 40 starts operation when the user manipulates or completely withdraws the lower drawer door 30b. can do.

27 is a cross-sectional view of the drawer door when the basket is fully raised. And, Figure 28 is a perspective view showing the state of the driving device and the lifting device in the state of Figure 27.

As shown, in a state in which the lower drawer door 30b is withdrawn, when an operation signal of the driving device 40 is input, the driving device 40 is operated, and the lifting of the lifting device 80 is performed. Thus, the state as shown in FIG. 27 may be obtained.

In this embodiment, the lifting of the lifting device 80 means that the upper frame 82 is raised by the scissor assembly 84, and the descending of the lifting device 80 is caused by the scissor assembly 84. This means that the upper frame 82 is lowered.

The driving device 40 is in a state connected to the lifting device 80, and thus, power can be transmitted to the lifting device 80. 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 ascend.

In detail, when the driving motor 64 rotates forward and backward by a rising or falling signal of the lifting device 80, the driving device 40 starts an operation.

Looking at the ascending operation of the lifting device 80 as a reference, a plurality of gears connecting the driving motor 64 and the screws 52 and 50a are rotated by the driving of the driving motor 64. At this time, since the same rotational force is transmitted to the screws 52 and 50a on both sides, the screw holders 56 and 56a are simultaneously raised by the same height.

As the screw holders 56 and 56a rise, the lever 42 connected to the screw holders 56 and 56a rotates. As the lever 42 connected to the screw holders 56 and 56a is rotated, the height of the lever 42 increases, and the first connected to the lever 42 by the increase in the height of the lever 42 The height of the first rod 842a of the scissor frame 841 is increased.

The scissor assembly 84 can be unfolded by increasing the height of the first rod 842a of the first scissor frame 841.

Eventually, as the scissor assembly 84 is unfolded, the upper frame 82 rises, and the basket 36 or food seated on the support plate 81 rises, and finally, as shown in FIG. The lifting device 80 is raised to the maximum height. In this state, the user can easily lift the food or basket 36 without excessively bowing the waist.

Looking in more detail at 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.

In a state in which the basket 36 is seated in the driving device 80, when viewed from the basket 36, an upper end H1 of the basket 36 is an upper end H2 of the lower storage space 12. ) Can be raised to a higher position. The height at this time is such that the user can reach the basket 36 without bending the waist, and may be the most suitable height for use.

In other words, the driving device 40 has a structure that is lifted from the inside of the drawer part 32, but in a state in which the basket 36 is seated in the lifting device 80, the basket 36 is It can be located at a height that is easily accessible.

After the user's food storage operation is completed, the user may lower the lifting device 80 by operating the operation unit 301. The lowering of the lifting device 80 may be performed by reverse rotation of the driving motor 64, and may be gradually performed through a process opposite to the above-described process.

In addition, when the lifting device 80 is lowered, it is in a state as shown in FIG. 25. At this time, the completion of the descending of the lifting device 80 is also performed by the lifting detection device 90. When the magnet is detected by the detection sensor 93 located below, the lifting device 80 determines that the descending has been completed, and the driving device 40 stops.

In addition, after the drive motor 64 is stopped, the lower drawer door 30b may be retracted. In this case, the lower drawer door 30b may be closed by a user's manipulation, or may be closed by driving the withdrawal motor 14. When the lower drawer door 30b is completely closed, the state as shown in FIG. 23 may be obtained.

Hereinafter, a process for detecting the minute opening of the lower drawer door by the door detection device 125 will be described in detail with reference to the drawings.

29 is a cross-sectional view showing the arrangement of the magnet and the door detection device when the drawer door is in a micro-open state. And, Fig. 30 is a view showing the action of the magnetic force attenuating member. And, Figure 31 is a cross-sectional view showing a state in the middle of the drawer door being closed. And, Figure 32 is a cross-sectional view showing a state in which the drawer door is completely closed. And, Figure 33 is a block diagram showing a control signal flow of the refrigerator according to an embodiment of the present invention.

As shown, the drawer door 30 may not be completely closed due to the weight of the drawer door 30 itself or the repulsive force of the door gasket 317. Of course, when the drawer door 30 is not clearly closed, it may be visually identifiable, and the drawer door 30 may be detected by the withdrawal/exit detection device 15. However, as shown in FIG. 29, when the drawer door 30 is slightly opened, it may not be detected.

And, in the state as shown in FIG. 29, the door sensing device 125 does not recognize the magnet 387, so the control unit 16 determines the minute opening of the drawer door 30, and the output device 17 It is possible to output the door fine opening. The output device 17 may be capable of various methods that can be delivered to a user such as audio output such as a display, a speaker, and a buzzer, and a screen output.

As shown in FIG. 29, in order to prevent the door sensing device 125 from recognizing the magnet 387 when the door sensing device 125 and the magnet are in close proximity, the magnetic force attenuating unit 386 as shown in FIG. As a result, a magnetic field M may be formed between the magnet 387 and the magnetic force attenuating part 386. Accordingly, the magnetic force of the magnet 387 is reduced to a set size by the magnetic force attenuating unit 386. At this time, the set size is such that when the magnet 387 is positioned at a position completely coincident with the door sensing device 125, the door sensing device 125 can recognize the magnet 387. Can be as

Accordingly, even if the door 30 is in the process of being closed as shown in FIG. 31, the detection sensor 125a of the door detection device 125 cannot detect the magnet 387 until it is completely closed as shown in FIG. 32.

On the other hand, the control unit 16 may drive the drawer door 30 when the door detection device 125 detects the minute opening of the door, thereby further retracting the drawer door 30. In this case, the withdrawal/retracting motor 14 may be operated until the magnet 387 is sensed by the door sensing device 125 to determine the closing of the drawer door 30. Accordingly, the drawer door 30 can be completely closed at the same time as the door sensing device 125 is detected, thereby minimizing the loss of cold air.

Claims (20)

A cabinet including an inner case forming a storage space;
A drawer-type door that opens and closes the storage space and is mounted to the cabinet to be retractable;
An elevating device provided on the door and configured to elevate at least a portion of the door;
A door gasket formed around a rear surface of the door, and sealing a space between the door and the cabinet when the door is closed;
A magnet mounting portion formed on one of both side surfaces of the door and receiving a magnet;
A door sensing device mounted on the inner case facing the magnet mounting portion when the door is closed, and sensing the magnet;
A control unit connected to the door detection device;
It includes an output means connected to the control unit,
And outputting that the door is in an open state through the output means when the magnet is not detected by the door detection device.
The method of claim 1,
The door,
A door unit for opening and closing the storage space;
It is connected to the door part and includes a drawer part forming a storage space,
The magnet mounting portion, characterized in that formed on the side of the drawer refrigerator.
The method of claim 2,
The drawer part,
A drawer body formed of a plastic material and forming the shape of the drawer part;
It is mounted on the outer surface of the drawer body, and includes an outer side plate formed of a metal material to form the outer shape of the drawer,
The magnet mounting portion and the magnet is a refrigerator, characterized in that shielded by the outer side plate.
The method of claim 3,
The magnet mounting portion is formed on the side of the drawer body,
The refrigerator, characterized in that the magnet receiving space in which the magnet is inserted is recessed in the magnet mounting portion.
The method of claim 4,
And a supporting part formed inside the magnet accommodation space to support the magnet from the inside so that the magnet and the door sensing device maintain a set distance.
The method of claim 4,
A plurality of reinforcing ribs protruding outward are formed on both sides of the drawer body,
The outer side plate is a refrigerator, characterized in that supported by the reinforcing rib.
The method of claim 6,
The reinforcing rib is a refrigerator, characterized in that connected to the outer surface of the magnet mounting portion.
The method of claim 5,
A magnetic force attenuating part is formed on the side of the magnet mounting part,
A refrigerator, characterized in that a conductive metal member is mounted on the magnetic force attenuating part.
The method of claim 8,
The conductive metal member is a screw,
A refrigerator, wherein a screw hole through which the screw is fastened is formed in the magnetic force attenuating part.
The method of claim 8,
And the magnetic force attenuating part is formed to contact one side of the magnet mounting part in a direction in which the door is closed.
The method of claim 10,
A refrigerator, characterized in that a plurality of magnetic force attenuating units are continuously arranged along a side surface of the magnet mounting unit.
The method of claim 1.
A refrigerator, characterized in that a screw made of a metal material is fastened to the rear of the magnet mounting portion to attenuate the magnetic force of the magnet.
The method of claim 1,
And a magnetic force attenuating unit mounted on a side of the magnet mounting unit to attenuate a magnetic force of the magnet.
The method of claim 13,
The refrigerator, characterized in that the conductive metal member is a metal screw.
The method of claim 13,
The magnetic force attenuating part is disposed in a direction in which the door is retracted based on the magnet mounting part.
The method of claim 13,
A refrigerator, characterized in that a plurality of magnetic force attenuating units are provided in a vertical direction.
The method of claim 1,
A pull-out motor connected to the pinion and providing power for pulling in and out of the door is provided at the bottom of the cabinet,
A pull-out rack to which the pinion is coupled and moved is provided on a lower surface of the door,
When the door is determined to be finely opened by the magnet sensing member, the control unit drives the withdrawal motor to close the door.
The method of claim 2,
And a driving device connected to the elevator device and providing power for driving the elevator device.
The method of claim 18,
The lifting device is provided inside the drawer,
Refrigerator, characterized in that connected to the driving device through the front of the drawer.
A cabinet including an inner case forming a storage space;
A drawer-type door that opens and closes the storage space and is mounted to the cabinet to be retractable;
A door gasket formed around a rear surface of the door, and sealing a space between the door and the cabinet when the door is closed;
A magnet mounting portion formed on one of both side surfaces of the door and receiving a magnet;
A door sensing device mounted on the inner case facing the magnet mounting portion when the door is closed, and sensing the magnet;
A control unit connected to the door detection device;
It includes an output means connected to the control unit,
And outputting that the door is in an open state through the output means when the magnet is not detected by the door detection device.

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