KR102167549B1 - Refrigerator - Google Patents

Abstract

In the refrigerator according to an embodiment of the present invention, at least a part of the refrigerator door can be selectively made transparent by a user's manipulation, so that the inside of the refrigerator can be seen in a closed state, and in particular, the inside of the refrigerator can be seen. The transparent panel assembly is characterized in that it can be mounted integrally with the out plate of the door.

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.

In addition, a separate storage space accessible from the outside may be provided on the door of the refrigerator. Through this storage space, the storage space can be accessed by opening some auxiliary doors or home bar doors without opening the entire refrigerator door.

Accordingly, frequently used foods can be stored in a separate storage space provided in the refrigerator door. In addition, since the entire refrigerator door is not opened for the storage of food, there is an advantage of minimizing the outflow of cold air inside the container.

However, even in such a structure, there is a problem in that food inside cannot be checked unless the refrigerator door is opened. That is, the door must be opened to check whether the desired food is stored in the interior space or in a separate storage space provided on the door. And, if there is no desired food when opening the auxiliary door or the home bar, there is an inconvenience such as having to open the main door again, and at this time, there is a problem that unnecessary leakage of cold air may occur.

In order to solve this problem, a part of the front of the refrigerator door may be formed of a transparent material, but in this case, an insulation problem in the interior may occur. In addition, when the inside can be seen even while the refrigerator is not in use, food is exposed to the outside as it is, and there is a problem that is very bad in appearance.

An object of the present invention is to provide a refrigerator that allows at least a part of a refrigerator door to be selectively made transparent by a user's manipulation so that the inside of the refrigerator can be seen in a closed state.

An object of the present invention is to provide a refrigerator in which a panel plate made of a glass material can be firmly fixedly mounted on a door and can minimize steps and gaps in the mounted state.

An object of the present invention is to allow a panel assembly capable of seeing the interior of a container to be integrally mounted with an out plate of a door.

An object of the present invention is to provide a refrigerator in which an insulating material can be completely filled inside a door.

A refrigerator according to an embodiment of the present invention includes: a cabinet forming a storage space; And a door for opening and closing the storage space, the door comprising: a door frame having an opening; A panel assembly covering the opening; And a support frame connecting the door frame and the panel assembly.

The door frame and the panel assembly may form an insulating space filled with an insulating material, and the support frame may be positioned within the insulating space, and the insulating material may cover the support frame.

The panel assembly includes: a front panel forming a front exterior of the door; An insulation panel disposed at a rear spaced apart from the front panel; It may include a gap bar disposed between the front panel and the insulation panel.

The support frame may include a first surface corresponding to one surface of the door frame and a second surface corresponding to a rear surface of the front panel.

The frame may include an out plate having the opening and a door liner connected to the out plate. The support frame may connect the out plate and the panel assembly.

The front panel may be formed of a glass material, and the out plate may be formed of a metal material.

The second surface may contact the rear surface of the front panel.

The front panel includes a front surface and a rear surface, and a side surface connecting the front surface and the rear surface, and the out plate includes a plate bent portion corresponding to a side surface of the front panel, and one surface of the frame is the plate bending portion. It is one side.

The front panel and the heat insulating panel are arranged in a first direction, and a length of the plate bent portion in a first direction is longer than a length of a side surface of the front panel in a first direction.

The first and second surfaces may be disposed to intersect.

The second surface of the supporter frame may be located between the plate bent portion and the gap bar.

The support frame may include a plate insertion portion into which the plate bent portion is inserted.

The support frame may include a constraining protrusion, and the plate bent portion may include a hole into which the constraining protrusion is inserted.

The front panel may be located in an area formed by the plate bent portion.

The front panel may include a bezel, and the second surface may be disposed at a position corresponding to the bezel.

The door further includes a knock detection device for detecting a knock applied to the front panel, and the support frame is configured to position the knock detection device so that the knock detection device contacts the rear surface of the front panel. May contain holes.

The knock detection device includes a microphone for sensing sound waves, and a microphone receiving unit accommodating the microphone, the microphone receiving unit contacting the rear surface of the front panel, and the microphone may be spaced apart from the rear surface of the front panel. have.

The frame may include an out plate having the opening and a door liner connected to the out plate. An opening through which the knock detection device passes may be formed in the door liner.

It may further include a cover covering the opening.

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

In a refrigerator according to an embodiment of the present invention, a panel assembly that selectively transmits and reflects light is provided on a part of the door, and a door lighting unit that is turned on and off by a user's operation is provided inside the door, and the door is closed. The lighting unit is turned on by the user's operation, so that the interior of the container can be seen through.

Therefore, even when the door is not opened, the space inside the container can be checked, and the location of the food can be easily checked, so that the convenience of use can be improved. In addition, since unnecessary opening and closing of the door can be prevented, loss of cold air can be prevented, thereby improving power consumption and improving storage performance.

In addition, it has a structure in which heterogeneous out panels and panel assemblies are fixed together by a support frame, and the panel assembly can be closely fixed to the out plate with a simple structure, thereby minimizing the occurrence of steps or gaps to further enhance the appearance. .

In addition, the twin support frame has a structure that is fixedly coupled to the plate bent, and when the foaming liquid is filled, the foaming liquid can be effectively introduced to the inside of the frame insertion part, thereby preventing the foaming liquid from being unfilled.

In addition, a heater for heating the front edge of the panel assembly can be fixed by the support frame. Therefore, it is possible to fix the out plate, the panel plate, and the heater in a single configuration with a simple structure, thereby improving productivity and assembly.

In addition, condensation can be prevented by increasing the surface temperature of the outer portion of the gap bar that is vulnerable to condensation at the edge of the panel assembly by the heater.

1 is a perspective view of a refrigerator according to an embodiment of the present invention.
2 is a perspective view of the refrigerator in which the sub-door is opened.
3 is a perspective view of the refrigerator in which the main door is opened.
4 is an exploded perspective view showing a coupling structure between the main door and the sub door.
5 is a partial perspective view showing a hinge coupling structure of an upper end of the main door and the sub door.
6 is a partial perspective view showing a state in which a hinge cover is mounted on the main door and the sub door.
7 is a partial perspective view showing the hinged structure of the lower end of the main door.
8 is a perspective view of the refrigerator compartment door as viewed from the rear.
9 is a perspective view of a door basket according to an embodiment of the present invention.
10 is an exploded perspective view of the door basket.
11 is a perspective view showing a state of use of the dividing member of the door basket.
12 is a front view of the sub-door.
13 is an exploded perspective view of the sub door.
14 is an exploded perspective view of a door lighting unit according to an embodiment of the present invention.
15 is a cross-sectional view of 15-15' of FIG. 1.
16 is a sectional view 16-16' of FIG. 12.
17 is a perspective view of a support frame according to an embodiment of the present invention.
18 is an exploded perspective view showing a coupling structure of an upper portion of the support frame.
19 is a perspective view of an upper frame constituting the support frame.
Fig. 20 is a perspective view of a side frame constituting the support frame as viewed from the front.
21 is a perspective view of a side frame constituting the support frame as viewed from the rear.
22 is an exploded perspective view showing a coupling structure under the support frame.
23 is a perspective view of a lower frame constituting the support frame.
24 is a cross-sectional view of FIG. 12 24-24'.
25 is a cross-sectional view 25-25' of FIG. 12.
26 is a cross-sectional view 26-26' of FIG. 12;
27 is a cross-sectional view 27-27' of FIG. 12.
28 is an exploded perspective view as viewed from the front of a coupling structure of a knock detection device according to an embodiment of the present invention.
29 is an exploded perspective view of a coupling structure of a knock detection device according to an embodiment of the present invention as viewed from the rear.
30 is an exploded perspective view of the knock detection device.
31 is a cross-sectional view showing a microphone structure of the knock detection device.
FIG. 32 is a cross-sectional view 32-32' of FIG. 12.
33 is a cross-sectional view 33-33' of FIG. 12.
34 is a block diagram showing a flow of a control signal of the refrigerator.
35 is a flowchart sequentially showing operation of the sub-door of the refrigerator.
36 is a perspective view of the refrigerator before a knock operation.
37 is a perspective view of the refrigerator after a knock operation.

Hereinafter, specific embodiments of the present invention will be described in detail together with the drawings. However, the present invention cannot be said to be limited to the embodiments in which the spirit of the present invention is presented, and other inventions that are regressive by addition, change, deletion, etc. of other components, or other embodiments included within the scope of the present invention can be easily performed. Can be suggested.

1 is a perspective view of a refrigerator according to an embodiment of the present invention. And, FIG. 2 is a perspective view of the refrigerator in which the sub-door is opened. 3 is a perspective view of the refrigerator in which the main door is opened.

As shown in the drawings, the refrigerator 1 according to the embodiment of the present invention may have an external shape by a cabinet 10 forming a storage space and a door opening and closing the storage space.

The interior of the cabinet 10 may be divided up and down by a barrier 11, a refrigerating compartment 12 may be formed in the upper part of the cabinet 10, and a freezing compartment 13 may be formed in the lower part of the cabinet 10. Can be formed.

The door may include a refrigerator compartment door 20 and a freezing compartment door 30. The refrigerating compartment door 20 may be configured to open and close the opened front of the refrigerating compartment 12 by rotation, and the freezing compartment door 30 may be configured to open and close the opened front of the freezing compartment 13 by rotation.

In addition, the refrigerating compartment door 20 may be configured such that a pair of left and right is provided to shield the refrigerating compartment 12 by a pair of doors. In addition, the freezing compartment door 30 may be pulled out in a drawer type, and may be configured to open and close the freezing compartment 13 by pulling in and out.

In addition, various storage members such as shelves, drawers, or baskets may be provided in the refrigerating chamber 12 and the freezing chamber 13. If necessary, the storage member may be withdrawn in and out of the refrigerating compartment door 20 and the freezing compartment door 30 in an open state, and food may be stored and stored through the withdrawal.

On the other hand, in the embodiment of the present invention, a refrigerator with a French-type door in which a pair of doors is rotated to open and close one space in a bottom freeze-type refrigerator provided with a freezer below is described as an example. Silver may be applied to all types of refrigerators equipped with doors regardless of the shape of the refrigerator.

When viewed from the front, the refrigerating compartment door 20 and the freezing compartment door 30 form an overall appearance and are formed of a metal material, so that the entire refrigerator 1 may have a metallic material texture. Further, if necessary, a dispenser 22 for dispensing water or ice may be provided in the refrigerating compartment door 20.

On the other hand, the refrigerating compartment door 20 on the right side (as seen in FIG. 1) of the pair of refrigerating compartment doors 20 may be configured to be double-opened. In detail, the refrigerating compartment door 20 positioned on the right has a main door 40 for opening and closing the refrigerating compartment 12, and an opening formed in the main door 40 by being rotatably disposed on the main door 40 ( It may be composed of a sub-door 50 that opens and closes 403.

The main door 40 may be formed in the same size as the refrigerating compartment door 20 on the left side (as seen in FIG. 1) among the pair of refrigerating compartment doors 20, and the upper hinge 401 and the lower hinge 402 As a result, it is rotatably mounted on the cabinet 10 to open and close at least a part of the refrigerating chamber 12.

In addition, an opening 403 opened to a predetermined size is formed in the main door 40. A door basket 43 is mounted on the rear surface of the main door 40 including the inside of the opening 403. Accordingly, the user can access the door basket 43 without opening the main door 40 through the opening 403. In this case, the size of the opening 403 may occupy most of the front surface of the main door 40 except for a part of the circumference of the main door 40.

The sub door 50 is rotatably mounted on the front surface of the main door 40 to open and close the opening 403. Accordingly, access to the opening 403 is possible even through the opening of the sub-door 50.

The size of the sub-door 50 may be formed equal to the size of the main door 40 and may be configured to cover the entire front surface of the main door 40. In addition, when the sub-door 50 is closed, the main door 40 and the sub-door 50 are in a combined state, and the refrigerating compartment door 20 formed on the left side may be configured to have the same size and shape. . In addition, a sub gasket 591 is provided on the rear surface of the sub door 50 to seal the space between the main door 40 and the sub door 50.

The sub-door 50 has a panel assembly 54 formed of a transparent material such as glass in the center. Accordingly, even when the sub-door 50 is closed, the inside of the opening 403 can be seen. The sub-door 50 may be referred to as a see-through door.

In addition, the panel assembly 54 is configured to adjust the transmittance and reflectance of light. Accordingly, it may be configured to selectively change a transparent or opaque state according to a user's manipulation. Therefore, it becomes transparent only in the state desired by the user to make the interior of the interior visible, and in the other state, it is possible to maintain an opaque state.

The sub-door 50 may have a sub-upper hinge 51 and a sub-lower hinge 52 at upper and lower ends, respectively, and may be rotatably mounted on the front of the main door 40. Accordingly, the sub-door 50 may be configured to independently rotate while the main door 40 is closed to open and close the opening 403.

A handle 23 may be provided on the front of the refrigerating compartment door 20. The handles 23 may be formed at ends of a pair of the refrigerating compartment doors 20 adjacent to each other. Meanwhile, the handle 23 of the refrigerating compartment door 20 positioned on the right side may be provided on the front side of the sub door 50.

In addition, an operation button 231 is provided on the handle 23, and a locking unit 232 operated by the operation button 231 is provided on the sub-door 50. The locking unit 232 protrudes to the rear of the sub-door 50 and may be selectively separated from the restraining member 404 of the main door by the operation of the operation button 231.

Therefore, when the sub-door 50 is closed, the locking unit 232 maintains a state in which the locking unit 232 is coupled with the restraining member 404. In this state, when the handle 23 is pulled and held, the main door As the 40 is rotated, the refrigerating chamber 12 may be opened.

And, when the user presses the operation button 231 while the sub-door 50 is closed, the locking unit 232 is separated from the restraining member 404 and only the sub-door 50 rotates. Can be. The opening 403 may be opened by the rotation of the sub door 50.

Meanwhile, a storage case 41 is formed on the rear surface of the main door 40. The storage case 41 defines a storage space on the rear surface of the main door 40, and a plurality of door baskets 43 are disposed therein.

4 is an exploded perspective view showing a coupling structure between the main door and the sub door. And, Figure 5 is a partial perspective view showing the hinged structure of the upper end of the main door and the sub-door. And, Figure 6 is a partial perspective view showing a state that the hinge cover is mounted on the main door and the sub door.

As shown in the drawing, an upper hinge mounting portion 405 to which an upper hinge 401 is mounted is formed at an upper end of the main door 40. The upper hinge 401 is fixedly mounted on the cabinet 10, and the hinge shaft 4011 is inserted into the hinge hole 4051 of the upper hinge mounting part 405 so that the main door 40 is inserted into the cabinet 10. ) To be rotatably mounted.

Further, a sub upper hinge mounting portion 501 on which the sub upper hinge 51 is mounted is recessed at an upper end of the sub door 50. The sub-upper hinge 51 is fixedly mounted on the upper hinge mounting part 405, and the hinge shaft 511 is inserted into the hinge hole 5011 of the sub-upper hinge mounting part 501 so that the sub-door 50 is It is to be mounted rotatably on the main door 40.

In this case, the hinge shaft 511 of the sub upper hinge 51 may be formed in a tube shape having a cross section of which one side is open. Such a cross-sectional structure provides a more expanded space inside the hinge shaft 511. Accordingly, the electric wires L connected to the electrical components (heater, knock detection device, and door lighting unit to be described below) provided in the sub-door 50 are provided through the hinge shaft 511 of the sub-upper hinge 51. It is guided to the outside of the sub-door 50 so that it can be connected to the main control unit 2 on the cabinet 10.

The upper hinge 401 and the sub upper hinge 51 are shielded by the main hinge cover 45 and the sub hinge cover 53. The main hinge cover 45 and the sub hinge cover 53 have a structure that is connected to each other, and an electric wire L guided to the outside through the sub upper hinge 51 passes through the sub hinge cover 53. It may be guided toward the main control unit 2 through the inner side of the main hinge cover 45.

In detail, the main hinge cover 45 is opened downward, and a space recessed inside is formed to accommodate the entire upper hinge 401. In addition, a separate PCB for controlling the electric component on the side of the sub-door 50 may be accommodated inside the main hinge cover 45.

The main hinge cover 45 may be fixedly mounted on one side of the cabinet 10 in a coupling structure or a coupling structure by a separate coupling member. In addition, a part of the main hinge cover 45 is formed to extend toward the upper hinge mounting portion 405 of the main door 40.

An extension part 451 extending in the direction of the rotation axis of the upper hinge 401 may be further formed on one side of the main hinge cover 45. In addition, a main connection part 452 may be formed at an end of the extension part 451. The main connection part 452 may be formed to be stepped downward from the end of the extension part 451. In addition, the main connection part 452 is formed in a circular shape, and the center of the main connection part 452 may be located on the same extension line as the hinge axis 4011 of the upper hinge 401. Further, a connection part hole 453 is opened on the upper surface of the main connection part 452 so that the electric wire L can enter and exit.

The sub-hinge cover 53 is formed to be opened below the sub-upper hinge 51 to accommodate the entire sub-upper hinge 51 by forming a recessed space therein. The sub hinge cover 53 may be fixedly mounted to the upper hinge mounting part 405. In addition, a part of the sub hinge cover 53 may extend toward the sub upper hinge mounting portion 501 to shield the sub upper hinge 51.

A cover fixing part 531 recessed downward is formed on one side of the sub upper hinge 51, and a coupling member such as a screw penetrates the cover fixing part 531 and is fastened to the sub upper hinge mounting part 501 Thus, the sub hinge cover 53 can be fixed.

On the other hand, the shape of the sub hinge cover 53 is formed in a shape corresponding to the space between the sub upper hinge mounting portion 501 and the main hinge cover 45 when the sub door 50 is closed. When the door 50 and the main door 40 are opened and closed, there is no interference.

In addition, a sub connection part 532 is formed on one side of the sub hinge cover 53. The sub connection part 532 extends toward the main door 40 and is mounted on an upper surface of the main connection part 452. In this case, the lower surface of the sub connection part 532 is opened, and thus the inner side of the sub connection part 532 may communicate with the inner side of the main connection part 452 by the connection part hole 453. The sub connection part 532 ) Is formed to have a circular cross-section like the main connection part 452, and is located on the same extension line as the center of the rotation axis of the upper hinge 401.

That is, the center of the rotation axis of the upper hinge 401 and the center of the main connection part 452 and the sub connection part 532 are all concentric. Accordingly, in a situation in which the main door 40 and the sub door 50 are rotated, the rotation axis of the upper hinge 401 and the main connection part 452 and the sub connection part 532 do not flow, and stable rotation is possible. . In addition, even when the main door 40 or the sub door 50 is rotated, the electric wire guided through the sub hinge cover 53 passes through the sub connection part 532 and the main connection part 452 in order to the main hinge. It can be guided to the inside of the cover 45.

In addition, the wires L may be connected by connectors 502 and 406, and the connectors 502 and 406 may be located inside the sub hinge cover 53. Therefore, the sub connector 502 connected to the end of the wire L exposed to the outside through the rotation axis of the sub upper hinge 51, and connected to the main control unit 2, through the main hinge cover 45 After connecting the main connectors 406 of the electric wires (L) guided toward the sub upper hinge mounting part 501 to each other, cover the sub hinge cover 53 to cover these electric wires (L), connectors (502,406) and the sub upper hinge. (51) can be shielded.

Meanwhile, a lower hinge 402 for supporting the lower end of the main door 40 is mounted on one front side of the cabinet 10. In addition, a sub lower hinge 52 for supporting the sub door 50 is mounted at the lower end of the main door 40.

7 is a partial perspective view showing the hinged structure of the lower end of the main door.

As shown in the drawing, the lower hinge 402 is mounted on the front surface of the cabinet 10 and allows the main door 40 to be rotatably supported.

The lower hinge 402 includes a main fixing part 4021 fixed to the front of the cabinet 10, and a main support part that is vertically bent at the main fixing part 4021 to support the lower end of the main door 40. In addition, a hinge shaft 4023 extending upward from the main support portion 4022 and inserted into the main door 40 may be configured. Accordingly, the lower end of the main door 40 is supported by the lower hinge 402, and the main door 40 may be rotated around the hinge shaft 4023.

In addition, the sub-lower hinge 52 is located in front of the lower hinge 402 and is provided at the lower end of the main door 40. The sub-lower hinge 52 may be mounted on the sub-lower hinge mounting part 407 recessed in the lower front of the main door 40.

The sub-lower hinge 52 includes a sub-fixing part 521 fixed to the sub-lower hinge mounting part 407, a sub-support part 522 bent at a lower end of the sub-fixing part 521 and extending forward, and the sub It may be configured as a hinge shaft 523 extending upward from the support part 522 and inserted into the sub-door 50. Accordingly, the lower end of the sub-door 50 is supported by the sub-lower hinge 52, and the sub-door 50 may be rotated around the hinge shaft 523.

8 is a perspective view of the refrigerator compartment door as viewed from the rear.

As shown in the drawing, the front surface of the storage case 41 is opened, and the opened front surface of the storage case 41 may be formed to correspond to the size of the opening 403. Accordingly, when the sub-door 50 is opened, the opening 403 is exposed, and the door basket 43 inside the storage case 41 can be accessed through the opening 403.

Further, a case door 42 that is opened and closed by rotation may be provided on the rear surface of the storage case 41. Accordingly, while the main door 40 is open, the case door 42 can be opened to access the door basket 43.

A case opening 432 and a door opening 421 may be formed in the storage case 41 and the case door 42 to allow cold air in the storage to flow into the storage case 41. Accordingly, the temperature inside the storage case 41 may be maintained equal to the temperature inside the refrigerating compartment 12.

Further, more specifically, on the rear surface of the main door 40, both sides of the opening 403 may have molding ends to which the door basket 43 can be mounted. The molding end may be formed in an uneven structure, and may be configured to allow detachment of the door basket 43.

9 is a perspective view of a door basket according to an embodiment of the present invention. And, Figure 10 is an exploded perspective view of the door basket. And, Figure 11 is a perspective view showing a state of use of the dividing member of the door basket.

As shown in the drawing, the door basket 43 is formed such that the upper surface thereof is opened, and a mounting portion 431 disposed inside the opening 403 is formed. The mounting portion 431 may have a width corresponding to the width of the opening 403, and mounting grooves 4311 may be formed on both sides thereof to be coupled to the forming ends of the opening 403.

The rear (front in FIG. 9) of the mounting portion 431 facing the rear surface of the sub-door 50 may be formed to be inclined. Accordingly, a predetermined gap may be formed between the rear surface of the sub-door 50 and the rear surface of the mounting portion 431, and the opening 403 is not covered with light irradiated from the door lighting unit 49 to be described below. ) The whole can be revealed.

In addition, the door basket 43 has a stopper 433 for fixing the dividing member 432 and the dividing member 432 at a set angle, and a stopper cap 434 for mounting the stopper 433. ) Can be included.

The dividing member 432 may be formed of a wire or bar, and may have a circular cross section having a predetermined diameter. In addition, the dividing member 432 includes a partition portion 4321 extending across the mounting portion 431, a first bent portion 4322 vertically bent at both ends of the partition portion 4321, A second bent portion 4323 bent vertically again at the first bent portion 4322, and an insertion portion 4324 bent outward at both ends of the second bent portion 4323 and inserted into the stopper 433 It can be composed of.

The stopper 433 is mounted on the inner side of the mounting part 431 and is disposed on both left and right sides to fix the dividing member 432. The stopper 433 may be formed in a cylindrical shape, and a cap insertion hole 4331 to which the stopper cap 434 is mounted may be formed on a side surface in contact with the mounting part 431. Further, a stopper hook 4332 for fixing the stopper 433 to the mounting portion 431 may be formed outside the cap insertion hole 4331.

In addition, a center hole 433 into which the insertion portion 4324 of the dividing member 432 is inserted may be formed in the center of the facing surface of the stopper 433 disposed on both sides. In addition, a fixing groove recessed inward may be formed around the stopper 433 around the center hole 433. The fixing groove is formed in a shape corresponding to the shape of the outer surface of the dividing member 432 to receive and fix the second bent portion 4323 of the dividing member 432.

The fixing groove is in a first fixing groove 4334 to allow the dividing member 432 to be located in a first position, a second fixing groove 4335 to be located in a second position, and a third position. It may be composed of a third fixing groove 4336 to be positioned. The first fixing groove 4334 and the third fixing groove 4336 are formed at positions facing the stopper 433 in the vertical direction, and the second fixing groove 4335 is the first fixing groove 4334 It may be formed at an intermediate point between the and the third fixing groove (4336). Each of the fixing grooves may be disposed at a point rotated at an angle of 90°, and the dividing member 432 may be fixed at a position fixed at an angle of 90°.

That is, the first position is a state in which the second bent portion 4323 is inserted into the first fixing groove 4334. In such a state, as shown in FIG. 9, the partition portion 4321 of the dividing member 432 is in close contact with the inner wall surface of the door basket 43, thereby forming the entire space inside the door basket 43. Can be used as a storage space.

In addition, the second position is a state in which the second bent portion 4323 is inserted into the second fixing groove 4335. In such a state, the partitioning part 4321 of the dividing member 432 is located at a position away from the inner wall surface of the door basket 43 to divide the inner space of the door basket 43 into two spaces. . In this case, the partition portion 4321 is positioned at a position further away from the stopper 433 by the length of the second bent portion 4323 to partition the space.

Further, the third position is a state in which the second bent portion 4323 is inserted into the third fixing groove 4336. In this state, as in the second position, the partition portion 4321 of the dividing member 432 is located at a position away from the inner wall surface of the door basket 43, thereby dividing the inner space of the door basket 43 into two. It is divided into space of

In this case, the partition portion 4321 is positioned at a position further away from the stopper 433 by the length of the first bent portion 4322 to partition the space. Since the first bent portion 4322 and the second bent portion 4323 have different lengths, the user can define a space division by the difference in length between the first bent portion 4322 and the second bent portion 4323 It can be selected and used according to.

In particular, as shown in FIG. 11, when the dividing member 432 is positioned at the second and third positions to divide the inner space of the door basket 43 into two, the width is narrow and the height is high. Fragile sauce bottles or tube containers can be stored effectively.

Meanwhile, stopper fixing holes 435 are formed on both side surfaces of the mounting part 431. The stopper fixing hole 435 is further formed with a fixing groove 4331, and the stopper hook 4332 is engaged and restrained. Accordingly, the stopper 433 may be fixed to the inner surface of the mounting portion 431 so as not to rotate. In addition, the stopper cap 434 may be provided outside the mounting portion 431. The stopper cap 434 is mounted in the stopper fixing hole 435, and the cap hook 441 in the center of the stopper cap 434 penetrates the stopper fixing hole 435 and is caught in the cap insertion hole 431 Restrained. Accordingly, the stopper 433 can be further firmly fixed by the stopper cap 434.

12 is a front view of the sub-door. And, Figure 13 is an exploded perspective view of the sub-door.

As shown in the drawing, the sub-door 50 is spaced apart from an out plate 55 forming an exterior, a panel assembly 54 mounted to an opening of the out plate 55, and the out plate 55 It may be composed of a door liner 58 to be mounted, and an upper cap deco 56 and a lower cap deco 57 forming the upper and lower surfaces of the sub-door 50. In this specification, the out plate 55, the door liner 58, and the cap deco 56 and 57 may be collectively referred to as a door frame.

The out plate 55 forms part of the front exterior and circumferential surface of the sub-door 50 and may be formed of a stainless material. In addition, a panel mounting hole 551 (or a first opening) in which the panel assembly 54 is formed is formed in the center of the out plate 55. The panel mounting hole 551 is a space for seeing the inside of the opening 403 of the main door 40 and may be formed to have the same size as or similar to the size of the opening 403. In addition, a plate bent portion 552 that is vertically bent inward along the circumference of the panel mounting hole 551 is formed. The plate bent portion 552 is bent so as to be inserted into the support frame 60 to be described below, and plate holes 5521 opened at regular intervals may be continuously formed in the plate bent portion 552.

The panel assembly 54 is formed to shield the panel mounting hole 551, and when the panel assembly 54 is mounted, the front surface of the panel assembly 54 is the front surface of the out plate 55 And can be formed in the same plane. The panel assembly 54 may be selectively transparent according to the on/off of the door lighting unit 49 and is configured to selectively see the inside of the opening 403. The configuration of the panel assembly 54 will be described in more detail below.

The upper cap deco 56 forms an upper surface of the sub-door 50 and is coupled to an upper end of the outer plate 55 and the door liner 58. In addition, the sub upper hinge mounting portion 501 is formed at one end of the upper cap deco 56, and the upper boss into which the hinge shaft 523 of the upper hinge 401 is inserted into the sub upper hinge mounting portion 501 (5012) can be mounted.

The lower cap deco 57 forms a lower surface of the sub-door 50 and is coupled to the outer plate 55 and the lower end of the door liner 58. In addition, a hinge plate 571 is mounted on the lower cap deco 57 at a position where the sub-lower hinge 52 is mounted, and a hinge shaft 523 of the sub-lower hinge 52 is mounted on the hinge plate 571. A lower boss 572 into which) is inserted may be mounted.

Meanwhile, two foaming liquid injection ports 573 may be formed in the lower cap deco 57. The foaming liquid injection port 573 is opened to inject a foaming liquid for forming an insulating material in the circumferential side of the panel assembly 54 in the inner space of the sub-door 50. In this case, in order to smoothly inject the foaming liquid into the inner side of the sub-door 50, it is formed to be opened vertically below the space between the outer side of the panel assembly 54 and the inner side of the sub-door 50. Therefore, when the foaming liquid is injected, the foaming liquid can be effectively injected without flowing backwards or undesired by surrounding interference. In addition, the foaming liquid injection port 573 may be shielded by an injection port cap 574 mounted on the lower cap deco 57.

The door liner 58 forms a rear surface of the sub-door 50, and a liner opening 581 (or a second opening) is formed in a region where the panel assembly 54 is disposed. In addition, a liner groove 582 for maintaining the shape of the door liner 58 may be formed around the door liner 58 along the liner opening 581, and the liner groove 582 A sub gasket 591 may be mounted which is recessed from the rear surface of the sub door 50 to seal the space between the sub door 50 and the main door 40. The panel assembly 54 may cover the liner opening 581 of the door liner 58. The size of the second opening is smaller than the size of the first opening.

In addition, the locking unit 232 may be mounted on one side of the door liner 58, and a knock detection device 82 and a door opening auxiliary device 588, which will be described in detail below, may be mounted.

Meanwhile, a heater 59 may be provided inside the sub-door 50. The heater 59 is disposed along the circumference of the rear surface of the panel assembly 54. In detail, the heater 59 may be disposed on the rear surface of the front panel 541 forming the front surface of the panel assembly 54, and mounted in the area of the bezel 5411 formed around the front panel 541 It is mounted so that it is not exposed to the outside.

In addition, a support frame 60 for fixing the out plate 55 and the panel assembly 54 is provided along the periphery of the panel mounting hole 551 on the rear surface of the out plate 55. The support frame 60 may be configured by a combination of an upper frame 61 and a lower frame 63 and a pair of side frames 62. Further, it may be formed along the edge of the panel mounting hole 551 to accommodate the plate bent portion 552 and adhered to the rear surface of the panel assembly 54. In addition, the heater 59 disposed on the rear surface of the panel assembly 54 may be fixed. The support frame 60 will be described in more detail below.

Meanwhile, a door lighting unit 49 may be mounted on an upper end of the liner opening 581. The door lighting unit 49 can illuminate a portion in which the plurality of door baskets 43 mounted on the main door 40 are disposed, and the inside of the cabinet looks brighter than the outside of the high so that the panel assembly 54 Make it look transparent.

The door lighting unit 49 includes a lamp case 491 mounted on the door liner 58, and a lamp PCB 492 accommodated in the lamp case 491 and in which a plurality of LEDs 4921 are disposed. Wow, it may be configured to include a lamp cover 493 exposed through the opening and shielding the opened lower surface of the lamp case 491.

14 is an exploded perspective view of a door lighting unit according to an embodiment of the present invention. And, FIG. 15 is a cross-sectional view of 15-15' of FIG. 1. And, FIG. 16 is a cross-sectional view of 16-16' of FIG. 12.

Looking in more detail with respect to the door lighting unit 49 with reference to the drawings, the door lighting unit 49 is attached to a lighting unit mounting portion 583 formed at the upper end of the liner opening 581 of the door liner 58. Can be mounted.

Case fixing parts 5831 are formed at both ends of the lighting unit mounting part 583, and case ribs 4911 protruding from both ends of the lamp case 491 are caught and constrained by the case fixing part 5831 so that the door The lighting unit 49 can be fixedly mounted.

The lamp cover 493 is formed to extend along the door liner 58 and includes a recessed portion 4912 to form a recessed space to accommodate the lamp PCB 492 therein. In detail, the recessed portion 4912 may be formed such that a surface facing the lamp PCB 492 is rounded, and light irradiated from the lamp PCB 492 through a round surface 4913 having a predetermined curvature It is reflected and directed toward the lamp case 491. In addition, a film for increasing the reflectance of light may be attached or coated on the inner surface of the recessed portion 4912, particularly on the round surface 4913.

A lamp PCB mounting portion 4914 on which the lamp PCB 492 is mounted is formed on one surface facing the round surface 4913. The lamp PCB mounting part 4914 is formed so that the lamp PCB 492 can be fixedly mounted in a direction intersecting the lamp cover 493 from the inside of the lamp case.

In addition, an electric wire entrance 4915 through which the electric wire L connected to the lamp PCB 492 may be formed at one side of the lamp PCB mounting part 4914. The wire entrance 4915 may be guided to the inner space of the sub-door 50 and may be accessed through the hinge shaft 523 of the sub upper hinge 51.

The lamp cover 493 is formed to transmit light reflected from the round surface 4913 of the depression 4912 and shields the opening of the depression 4912. The lamp cover 493 is formed to be transparent or translucent so that light reflected from the round surface 4913 and spread evenly can be transmitted. Accordingly, the light passing through the lamp cover 493 illuminates the interior of the interior by an indirect lighting method, and has the same effect as surface light emission.

In addition, the lamp cover 493 may be attached with a film or coated to diffuse light more effectively. In addition, particles or materials that diffuse light may be added when the lamp cover 493 is injection-molded as needed.

The lighting unit mounting portion on which the door lighting unit is mounted extends to the inside of the opening, and the lamp cover irradiates light downward from the upper end of the opening when the door lighting unit is mounted.

The rear ends of the plurality of door baskets 43 mounted on the opening 403 are spaced apart from the rear surface of the sub-door 50, and are located more inside the door than the door lighting unit 49. Accordingly, as shown in FIG. 15, the light irradiated downward from the door lighting unit 49 is prevented from being covered by the door basket 43 or the food stored in the door basket 43.

In addition, the front side of the door basket 43 adjacent to the rear end of the panel assembly 54 is formed to be inclined so that light irradiated downward by the door lighting unit 49 does not interfere and illuminates the entire opening. Can be configured.

The door lighting unit 49 can be selectively turned on/off according to a user's manipulation, and when the door lighting unit 49 is turned on, a storage space formed in the main door 40 is revealed. You lose. When the storage space of the main door 40 becomes brighter than the outside of the cabinet by the lighting of the door lighting unit 49, the light irradiated by the door lighting unit 49 causes the sub-door 50 Penetrates. Accordingly, the user can transparently recognize the sub-door 50 and can see the storage space inside the main door 40 through the sub-door 50 from the outside.

Meanwhile, the panel assembly 54 can be fixedly mounted on the sub-door 50 by the support frame 60. One side of the support frame 60 may be fixed to the out plate 55, and the other side of the support frame 60 is adhered to the panel assembly 54 so that the panel assembly 54 is fixed on the panel mounting hole 551. To be able to.

Looking in more detail with respect to the panel assembly 54, the panel assembly 54 includes a front panel 541 and at least one insulating panel 542 disposed behind the front panel 541, and the front panel It may be configured to include 541 and the insulation panel 542, and a partition bar 543 supporting between the plurality of insulation panels 542.

The front panel 541 may be formed of a glass material capable of selectively seeing the inside according to the transmittance and reflectance of light, and may be referred to as a half mirror.

That is, when the door lighting unit 49 is turned on, the light inside the cabinet passes through the front panel 541 so that the front panel 541 is transparent. Accordingly, the interior space behind the sub-door 50 or the storage space formed in the main door 40 can be viewed from the outside while the sub-door 50 is closed.

In addition, when the door lighting unit 49 is turned off, light does not pass through the front panel 541 and is reflected, so that the front panel 541 becomes a mirror surface. In this state, the interior space behind the sub-door 50 or the storage space formed in the main door 40 cannot be seen from the outside.

Various surface treatments may be applied to the front panel 541 so that the front panel 541 may have the same effect as a half mirror. For example, a titanium compound may be vacuum deposited on the entire surface of the glass layer constituting the front panel 541.

In addition, a ceramic printed layer is formed by silkscreen printing using a printing ink composed of a resin for controlling viscosity, an organic solvent, and an additive made of a titanium compound (TiO ₂ ) as a main component on the back of the glass layer constituting the front panel. You may.

In addition, a hard coating layer composed of three layers of iron, cobalt, and chrome is applied to the back of the glass layer constituting the front panel by the Atmospheric Pressure Cemical Vapor Deposition (APCAVD) method. Alternatively, it may be formed by spraying a coating material in a liquid state.

When a ceramic printing layer or a hard coating layer is formed on the rear surface of the glass layer, the front panel 541 may be formed to have a light transmittance of 20% to 30% outside the front panel 541. At this time, when the transmittance is less than 20%, it is not easy to see the inside when viewed from the outside even when the door lighting unit 49 is turned on, and when the transmittance is more than 30%, the door lighting unit 49 is turned off. Even when viewed from the outside, the front surface of the panel assembly 54 does not look like a mirror surface, and the inside of the cabinet can be partially seen.

Meanwhile, the bezel 5411 formed along the circumference of the rear surface of the front panel 541 may be formed so that light cannot be transmitted, and the edge of the front panel 541 on which the bezel 5411 is formed is It is configured to extend further outward than the insulation panel 542. Accordingly, on the rear surface of the front panel 541 on which the bezel 5411 is formed, the support frame 60, the heater 59, and the partition bar 543 are not exposed forward through the front panel 541.

In addition, the knock detection device 82 may be disposed on the bezel 5411 formed at the lower end of the front panel 541. Accordingly, the knock detection device 82 may also be covered by the bezel 5411 so that it is not exposed to the outside.

In detail, the support frame 60 may be disposed in the region of the bezel 5411 to fix the panel assembly 54. In addition, the heater 59 fixed by the support frame 60 may also be located in the region of the bezel 5411. Accordingly, both the heater 59 and the support frame 60 disposed along the edge of the panel assembly 54 are covered by the bezel 5411 and are not exposed to the outside.

In addition, a gap bar 543 is formed around the rear surface of the front panel 541. The gap bar 543 separates the front panel 541 and the insulation panel 542 from each other, and allows the front panel 541 and the insulation panel 542 to be spaced apart from each other, and seals the gap therebetween. .

The interlayer 543 may also be disposed between the plurality of insulation panels 542. In addition, the front panel 541, the insulating panel 542, and the plurality of partition bars 543 may be attached to each other by an adhesive, and a sealant is applied to the front panel 541, the insulating panel 542, and the partition bar ( The space between 543 and the outer surface of the panel assembly 54 can be kept airtight.

The insulating panel 542 may be formed to be smaller in size than the front panel 541 and may be located in an inner region of the front panel 541. In addition, the heat insulating panel 542 is preferably a chemically strengthened glass that is chemically strengthened by immersing the glass in an electrolyte solution above the glass transition temperature.

In addition, a low-emissivity coating layer may be formed on the rear surface of the heat insulating panel 542 to reduce heat transfer into the storage chamber by radiation. The glass on which the low-emission coating layer is formed is called Low-ε Glass, and a low-emission coating layer can be formed by depositing silver or the like on the surface of the glass by sputtering or the like.

In addition, the sealed space between the front panel 541 and the insulating panel 542 formed by the interlayer 543 and the sealed space between the plurality of insulating panels may be formed in a vacuum state to be insulated. .

If necessary, an inert gas such as argon gas for insulation may be filled between the sealed space between the front panel 541 and the insulation panel 542 and the sealed space between the plurality of insulation panels 542. The inert gas has better thermal insulation properties than general air. For this reason, it is possible to secure thermal insulation performance by forming a predetermined space filled with an inert gas between the front panel 541 and the thermal insulation panel 542 and between the plurality of thermal insulation panels 542.

The insulating panel 542 may be formed as a single panel and mounted to be spaced apart from the front panel 541, and if necessary, it may be configured such that two or more of the insulating panels 542 are spaced apart.

17 is a perspective view of a support frame according to an embodiment of the present invention.

As shown in the drawing, the support frame 60 is disposed above and below the upper frame 61 and the lower frame 63, and a pair of sides between the upper frame 61 and the lower frame 63 The frame 62 may be connected to form a square shape.

The support frame 60 may be injection formed of a plastic material. The support frame 60 may be formed so that the plate bent portion 552 of the out plate 55 can be inserted in the assembled state, and at the same time, the heater 59 may be fixed.

In detail, the support frame 60 in the assembled state may be provided with plate insertion portions 611, 621, 631 into which the plate bent portion 552 is inserted, and the plate insertion portions 611, 621, 631 are around the support frame 60 It can be formed along the whole. In addition, a plurality of restraining protrusions 612, 622, and 632 may be formed in the plate insertion portions 611, 621, and 631 at regular intervals. A plurality of holes 614, 624, 634 are formed on the plate insertion portions 611, 621, 631 corresponding to the constraining protrusions 612, 622, 632 to facilitate the introduction of the foaming liquid into the plate insertion portions 611, 621, 631 In addition, the constraining protrusions 612, 622, and 632 are formed at positions corresponding to the plurality of holes 614, 624, and 634 to facilitate the molding of the constraining protrusions 612, 622, and 632 during injection molding.

In addition, heater grooves 613, 623 and 633 are formed in the support frame 60 to correspond to the arrangement of the heater 59 so that the heater 59 can be mounted.

The entire width of the support frame 60 is formed to be covered by the bezel 5411 on which the panel assembly 54 is provided. In addition, it may be formed to extend to the outer end of the heat insulating panel 542.

Hereinafter, each component constituting the support frame will be described in more detail with reference to the drawings.

18 is an exploded perspective view showing a coupling structure of an upper portion of the support frame. And, Fig. 19 is a perspective view of an upper frame constituting the support frame.

As shown in the drawing, the upper frame 61 forms an upper portion of the support frame 60. Both ends of the upper frame 61 are bent downward, and may be coupled to the upper end of the side frame 62. To this end, both ends of the upper frame 61 may be bent downward and then opened. In addition, upper hook grooves 615 into which the side hooks 625 formed on the upper end of the side frame 62 are inserted may be formed at both ends of the upper frame 61.

In addition, the upper insertion portion 611 may be recessed on one surface of the upper frame 61 in contact with the rear surface of the out plate 55. The upper insertion portion 611 is formed so that a portion of the plate bent portion 552 forming an upper end of the panel mounting hole 551 can be inserted.

In this case, the upper insertion portion 611 may be formed to be thicker than the thickness of the out plate 55 and the protruding height of the upper restraining protrusion 612 formed on the upper insertion portion 611. Accordingly, the plate bent portion 552 may be inserted into the upper insertion portion 611, and after the insertion, the upper restraining protrusion 612 is inserted into the plate hole 5521 so that the out plate 55 and the upper The frames 61 may be coupled to each other.

Further, an upper heater groove 613 is formed on the inner side of the upper insertion portion 611, that is, at the opening side of the support frame 60, so that the upper portion of the heater 59 disposed along the edge of the front panel 541 To accommodate the part of the In addition, a wire entry part 616 is opened at one side of the upper heater groove 613 so that a wire L connected to the heater 59 may enter and exit.

On the other hand, an upper hole 614 is further formed on the upper insertion part 611 corresponding to the upper constraining protrusion 612, so that a foaming solution for forming a heat insulating material can enter and exit between the upper holes 614 Thus, the foaming liquid may be filled into the upper insertion portion 611 of the upper frame 61 without any gaps.

Fig. 20 is a perspective view of a side frame constituting the support frame as viewed from the front. And, Fig. 21 is a perspective view of a side frame constituting the support frame as viewed from the rear.

As shown in the drawing, the side frame 62 forms both side surfaces of the support frame 60. The side frame 62 is formed to have a length capable of connecting between the upper frame 61 and the lower frame 63. To this end, side hooks 625 are formed at the top and bottom of the side frame 62. In addition, the side hook 625 may be coupled to the upper hook groove 615 of the upper frame 61 and the lower hook groove 635 of the lower frame 63.

In addition, a side rib 626 that can be inserted into the upper insertion portion 611 of the upper frame 61 and the lower insertion portion 631 of the lower frame 63 is at the upper and lower ends of the side frame 62. Can be formed. Accordingly, the side frame 62, the upper frame 61, and the lower frame 63 are able to maintain a stable coupling state with each other.

In addition, the side insertion portion 621 may be recessed on one surface of the side frame 62 in contact with the rear surface of the out plate 55. The side inserting part 621 is formed so that portions of the plate bent part 552 that form both side ends of the panel mounting hole 551 can be inserted.

In this case, the side insertion portion 621 may be formed to have a thickness greater than the thickness of the out plate 55 and the protruding height of the side restraining protrusion 622 formed on the side insertion portion 621. Accordingly, the plate bent portion 552 may be inserted into the side inserting portion 621, and after insertion, the side restraining protrusion 622 is inserted into the plate hole 5521 so that the out plate 55 and the side The frames 62 may be coupled to each other.

Further, a side heater groove 623 is formed further inside the side insertion portion 621 to accommodate a side portion of the heater 59 disposed along the edge of the front panel 541.

On the other hand, a side hole 624 is further formed on the side insertion portion 621 corresponding to the side restraining protrusion 622, and a foaming liquid can be passed through the side hole 624 so that the side frame ( The foaming liquid may be filled up to the inside of the side insertion part 621 of 62).

22 is an exploded perspective view showing a coupling structure under the support frame. And, Fig. 23 is a perspective view of a lower frame constituting the support frame.

As shown in the drawing, the lower frame 63 forms a lower portion of the support frame 60. Both ends of the lower frame 63 are bent upward, and may be coupled to a lower end of the side frame 62. To this end, both ends of the lower frame 63 may be bent upward and then opened. Further, a lower hook groove 635 into which a side hook 625 formed at a lower end of the side frame 62 is inserted may be formed at both ends of the lower frame 63.

In addition, the lower insertion portion 631 may be recessed on one surface of the lower frame 63 in contact with the rear surface of the out plate 55. The lower insertion portion 631 is formed so that a portion of the plate bent portion 552 that forms the lower end of the panel mounting hole 551 can be inserted.

In this case, the lower insertion portion 631 may be formed to be thicker than the thickness of the out plate 55 and the protruding height of the lower constraining protrusion 632 formed on the lower insertion portion 631. Accordingly, the plate bent portion 552 may be inserted into the lower insertion portion 631, and after the insertion, the lower restraining protrusion 632 is inserted into the plate hole 5521 so that the out plate 55 and the lower The frames 63 may be coupled to each other.

In addition, a lower heater groove 633 is formed further inside the lower insertion part 631 to accommodate a lower end of the heaters 59 disposed along the edge of the front panel 541.

On the other hand, a lower hole 634 is further formed on the lower insertion part 631 corresponding to the lower constraining protrusion 632, and a foaming liquid can be passed through the lower hole 634, so that the lower frame ( The foaming liquid may be filled up to the inside of the lower insertion part 631 of 63) and a heat insulating material may be formed.

Further, a sensing device hole 636 is formed on one side of the lower frame 63 to expose the knock sensing device 82 to be described in detail below. Accordingly, the knock detection device 82 is provided at the rear of the lower frame 63 and can be in close contact with the rear surface of the front panel 541 through the detection device hole 636.

24 is a cross-sectional view of FIG. 12 24-24'. And, FIG. 25 is a cross-sectional view 25-25' of FIG. 12. And, FIG. 26 is a cross-sectional view 26-26' of FIG. 12. And, FIG. 27 is a cross-sectional view 27-27' of FIG. 12.

Referring to these drawings, the upper frame 61, the side frame 62, and the lower frame 63 are all attached to the protruding edge of the front panel 541. The upper frame 61, the side frame 62, and the lower frame 63 may be attached to the rear surface of the front panel 541 on which the bezel 5411 is formed using an adhesive sheet 5412 or an adhesive.

In addition, ends of the upper frame 61 and the side frame 62 and the lower frame 63 may extend to an outer end of the heat insulating panel 542, and the upper frame 61 and the side frame 62 In addition, the upper heater groove 613, the side heater groove 623, and the lower heater groove 633 are formed at the end of the lower frame 63, so that the edge of the front panel 541 has a relatively lower temperature than the front surface. Is heated. In addition, an aluminum sheet 5413 having a predetermined width may be disposed between the heater 59 and the front panel 541. Accordingly, when the heater 59 generates heat, the region of the front panel 541 in which the bezel 5411 is formed may be evenly heated.

And, the upper frame 61 and the side frame 62 attached to the front panel 541 and the upper insertion portion 611 and the side insertion portion 621 and the lower insertion portion of the lower frame 63 The plate bent portion 552 of the out plate 55 is inserted into the 631.

As shown in FIG. 24, the plate bent portion 552 is in close contact with the front panel 541 while being inserted into the side insertion portion 621. In addition, the plate hole 5521 of the plate bent portion 552 is engaged with the side restraining protrusion 622 so that the out plate 55 and the side frame 62 can be fixedly coupled. That is, the front panel 541 may be located in a region formed by the plate bent portion 552.

In addition, the foaming liquid may be introduced into the side inserting portion 621 through the side hole 624, and the foaming liquid introduced pushes the plate bent portion 552 toward the front panel 541 to make it in close contact. do.

Due to this structure, the plate bent portion 552 formed on the out plate 55 can be in close contact with the outer end of the front panel 541. Accordingly, when viewed from the front, a gap gap between the end of the out plate 55 forming the panel mounting hole 551 and the outer end of the front panel 541 may be minimized.

Meanwhile, referring to FIG. 24, looking at the structure of the side frame 62, which is one configuration of the support frame, the side frame 62 is formed on the inner side of the side insertion part 621 with the plate bent part ( A first surface supporting the front panel 541 is formed in contact with 522, a second surface supporting the rear surface of the front panel 541 is formed, and a third surface supporting the rear surface of the out plate 55 is formed. In addition, it can be seen that the second surface and the third surface are arranged parallel to each other, and the first surface and the second surface are arranged to cross each other.

The second surface may be positioned between the gap rod and the plate bent portion 522. The second surface may be disposed at a position corresponding to the bezel 5411 of the front panel 541.

The front panel 541 and the insulating panel may be arranged in a first direction. The front panel 541 may include a front surface, a rear surface, and a side surface connecting the front surface and the rear surface.

A length of the plate bent portion 522 in the first direction is longer than a length of the front panel 541 in the first direction.

In the present exemplary embodiment, a portion of the side frame 62 including the second surface may be referred to as a first portion, and a portion including the third surface may be referred to as a second portion. A portion including the hole 624 may be referred to as a third portion.

Referring to the drawings, a first portion of the side frame 62 corresponds to a rear surface of the front panel 541, and the second portion corresponds to one surface of the out plate 55. For example, one surface of the out plate 55 may be a rear surface, and the second portion may contact the rear surface of the out plate 55.

The first portion of the side frame 62 may be located closer to the storage space than the second portion. The plate insertion part 611 may be located between the first part and the second part. For example, the first part may contact the bezel 5411 of the front panel 541.

The third portion of the side frame 62 may be disposed to face the rear surface of the out plate 55. The first part and the third part are offset based on the front-rear direction of the door. That is, the first portion and the third portion may be spaced apart from each other in the front-rear direction.

The out plate 55, the door liner 58, and the panel assembly 54 may form an insulating space filled with a foaming liquid for forming an insulating material. The support frame 60 may be located within the insulating space.

The insulating material may contact the side frame 62. For example, the heat insulating material may contact the first to third parts.

In this structure, not only the side frame 62 but also the upper frame 61 and the lower frame 63 are the same, and a detailed description thereof will be omitted in order to prevent duplication of description.

28 is an exploded perspective view as viewed from the front of a coupling structure of a knock detection device according to an embodiment of the present invention. And, FIG. 29 is an exploded perspective view of a coupling structure of a knock detection device according to an embodiment of the present invention as viewed from the rear.

As shown in the drawing, a sensor opening 584 into which the knock detection device 82 can be inserted is formed under the door liner 58. The sensor opening 584 is formed so that the knock detection device 82 can be inserted and mounted from the outside. And, it is formed in a shape corresponding to the insert cover 585 on which the detection device PCB 83 for processing the knock detection signal of the knock detection device 82 is mounted so that it can be shielded by the insert cover 585 Is formed.

The insert cover 585 has an outer surface having the same shape as the outer surface of the door liner 58 in a mounted state. Accordingly, the insert cover 585 is mounted at a position where the liner groove 582 formed in the door liner 58 passes, and thus, a cover groove 584 connected to the liner groove 582 in the insert cover 585 ) Is formed. Accordingly, the sub gasket 591 may be mounted to pass through the liner groove 582 and the cover groove 584.

A sensing device accommodating portion 586 may be formed along the periphery of the sensor opening 584. The sensing device accommodating part 586 forms a part of the space accommodating the knock sensing device 82, is extended toward the out plate 55, is coupled to the accommodating part case 587, and is coupled to the knock sensing device ( 82) is to be accommodated.

The receiving part case 587 is combined with the front end of the sensing device receiving part 586 to form a remaining space accommodating the knock detecting device 82. In addition, the case coupling portions 5871 to which screws are fastened are formed at both ends of the receiving part case 587 so that the receiving part case 587 can be coupled and fixed to the sensing device receiving part 586.

In addition, the accommodating part case 587 is formed with a sensing device insertion part 5872 into which the front end of the knock sensing device 82 is inserted. In addition, the front surface of the sensing device insertion part 5882 is an insertion part hole 5873 that is opened, and the sensing device insertion part 5872 is inserted into the sensing device hole 636 of the lower frame 63. Accordingly, the knock detection device 82 inserted inside the detection device insertion part 5882 has its front surface passing through the insertion part hole 5873 and the detection device hole 636, and the rear surface of the front panel 541 It will be able to adhere to.

The end portions of the sensing device accommodating portion 586 and the accommodating portion case 587 are formed in a structure having corresponding inclinations, so that they can be coupled with each other with directionality. In addition, the space in which the knock detection device 82 and the detection device PCB 83 can be mounted is provided by the combination of the detection device receiving part 586 and the receiving part case 587. Is formed inside.

When the sensing device accommodating part 586 and the accommodating part case 587 are coupled to each other, a space independent from the space into which the foaming liquid is injected is formed inside the sub-door 50. Accordingly, the user can insert and mount the knock detection device 82 through the sensor opening 584 after foaming the sub-door 50.

Meanwhile, the insert cover 585 may be composed of a cover part 5585 which shields the sensor opening 584 and a PCB insertion part 5852 on which the detection device PCB 83 is mounted. The cover part 5585 is formed in a shape corresponding to the sensor opening 584 to shield the sensor opening 584 and form a part of the exterior of the door liner 58. In addition, a screw hole 5853 is formed at one side of the cover part 5585 and may be fixed to the door liner 58 by a screw.

Further, the PCB insertion part 5852 is formed to extend from the cover part 5585 and is formed to be inserted into the sensing device receiving part 586 when the insert cover 585 is mounted. In addition, the cover part 5585 is formed to correspond to the size of the detection device PCB 83 so that the insert cover 585 is inserted into the sensor opening 584 while the detection device PCB 83 is mounted. Can be installed. And although not shown in detail, the wire L connected to the knock detection device 82 may be connected to the detection device PCB 83 at an adjacent position. Since the detection device PCB 83 may be disposed on the side of the knock detection device 82, the detection device PCB 83 can be connected to the knock detection device 82 at a nearby distance.

When a PCB processing signal is located at a long distance, there is a problem in that noise generated when a detected signal is moved through a signal line to be processed may increase. However, by arranging the detection device PCB 83 together at the position where the knock detection device 82 is mounted, the main control unit 2 receives only whether a valid knock-on signal is input. Through this, it is possible to minimize the effect of noise caused by the signal line between the main control unit 2 and the detection device PCB 83. That is, the main control unit 2 receives a signal with minimized noise through the detection device PCB 83. Therefore, it is possible to secure an accurate recognition rate.

In particular, in the case of the knock detection device 82, the signal output by the microphone 8211 is in mV units, whereas the main control unit 2, which controls the overall driving of the refrigerator, basically receives a signal in V unit. to be. Therefore, it is not desirable to determine whether the main control unit 2 is a normal knock-on signal due to the difference in scale of the physical signal.

Refrigerators are electronic devices that use high voltage/high current. Therefore, the amount of electrical noise generated is relatively large. This means that the signal in mV output by the microphone 8211 may be more vulnerable to electrical noise.

Therefore, by arranging the detection device PCB 83 at a position adjacent to the knock detection device 82, it is possible to dramatically reduce noise and thereby improve a recognition rate.

30 is an exploded perspective view of the knock detection device. And, Figure 31 is a cross-sectional view showing the structure of the microphone of the knock detection device. And, FIG. 32 is a cross-sectional view 32-32' of FIG. 12. And, FIG. 33 is a cross-sectional view 33-33' of FIG. 12.

Looking in detail with respect to the structure of the knock detection device 82 with reference to the drawings, the knock detection device 82 is a device for detecting a knock operation of the sub-door 50 by a user.

The knock detection device 82 includes a microphone module 821 for detecting a knock-on signal, a holder 823 in which the microphone module 821 is accommodated, and the holder 823 and the microphone module 821 on the front side. It may be configured to include an elastic member 824 for pressing and contacting the panel 541 side, and a support member 825 that supports the elastic member 824 and the holder 823.

The microphone module 821 includes a microphone 8211 that directly senses sound waves and a microphone receiving unit 8212 that accommodates the microphone 8211. The microphone 8211 directly senses sound waves, is formed in a circular shape having a predetermined thickness, and is fixedly mounted inside the microphone module 821. One surface of the microphone 8211 may be referred to as a sound wave receiving unit 8213 for receiving sound waves, and the sound wave receiving unit 8213 is disposed to face the opening 8214 of the microphone receiving unit 8212. Further, a signal line 8216 is connected to the other side of the microphone 8211, and the signal line 8216 may be connected to the detection device PCB 83.

The microphone accommodating part 8212 is formed of an elastic material such as rubber, and is formed to be in close contact with the front panel 541. To this end, an opening 8214 is formed at one side adjacent to the microphone 8211 mounted inside the microphone receiving unit 8212 in the microphone receiving unit 8212, and a circular protrusion around the opening 8214 ( 8215) may be formed. In addition, the protrusion 8215 is not inclined in one direction when the microphone receiving part 8212 is in close contact with the front panel 541, and the opened front of the opening 403 is in close contact with the front panel 541 as a whole. Keep it in a state of being.

A sealed predetermined space may be formed between the opening 8214 in close contact with the protrusion 8215 and the sound wave receiving unit 8213. Accordingly, the front of the contact space is sealed by a medium, that is, the front panel 541. Accordingly, the vibration transmitted through the inside of the medium causes the air in the predetermined space to vibrate, and a sound wave caused by such vibration may be received by the microphone 8211.

Due to this sealing, it is possible to minimize the introduction of external noise or vibration into the predetermined space. This can significantly reduce knock-on judgment errors and malfunctions due to external noise, and ensure a very accurate knock-on recognition rate. That is, when a knock-on input is applied, it is possible to dramatically increase the accuracy of determining that the knock-on input is knock-on.

The holder 823 accommodates the microphone module 821, and a module seating portion 8231 opened toward the front panel 541 may be formed. The microphone module 821 may be formed such that at least the protrusion 8215 protrudes more than the front surface of the holder 823 while seated on the module mounting portion 8231.

In addition, a holder slot 8232 through which the signal line connected to the microphone 8211 enters and exits is formed in the holder 823. The holder slot 8232 is formed to be opened at one side of the module mounting portion 8231.

In addition, a first elastic member fixing portion 8233 is formed on the rear surface of the holder 823 so that the elastic member 824 is fixedly mounted. The first elastic member fixing part 8233 may be formed to extend through one end of the coil-shaped elastic member 824.

Further, holder coupling portions 8234 are formed on both sides of the holder 823 in a shape of a hook and coupled to the support member 825. The holder 823 is coupled so as not to be removed by the support member 825 by the holder coupling portion 8234. Further, the holder 823 is not restricted from moving in the direction in which the holder 823 is inserted into the support member 825 due to the hook shape of the holder coupling portion 8234.

The support member 825 is formed such that the front surface thereof is opened, and the holder 823 is formed to be inserted through the opened front surface. In addition, a second elastic member fixing part 8251 may be formed inside the holder 823 so that the elastic member 824 is fixedly mounted. The second elastic member fixing part 8251 is positioned on the same extension line as the first elastic member fixing part 8233 and is inserted through one end of the elastic member 824.

Therefore, even if the elastic member 824 is compressed to press the holder 823, the elastic member 824 is not buckled and can stably press the holder 823 in the direction of the front panel 541. do.

By the elastic member 824, the microphone module 821 maintains a state in close contact with the front panel 541, and in particular, the shock generated when the main door 40 and the sub door 50 are opened and closed. Alternatively, even by the inertia when the main door 40 and the sub door 50 are rotated, the position of the microphone module 821 is not changed and the position of the microphone module 821 is always kept in close contact with the front panel 541.

A support member slot 8252 may be formed on one side of the support member 825. The support member slot 8252 may be formed on the same extension line as the holder slot 8232. Accordingly, a signal line passing through the holder slot 8232 may pass through the support member slot 8252 and be connected to the detection device PCB 83.

A support member fixing part 8254 is formed on the other side of the support member 825. The support member fixing part 8254 extends outward and may be fixedly mounted to the sensing device coupling boss 5874 on the receiving part case 587 by a screw. The detection device coupling boss is formed so as to be exposed through the sensor opening, so that the knock detection device can be fixedly mounted through the sensor opening after the detection device is inserted.

Meanwhile, the knock detection device 82 is positioned at the edge of the front panel 541, but the effective input portion of the user's knock operation is not limited thereto. Due to the characteristics of the microphone 8211 that senses sound waves due to vibrations rather than vibrations itself, in an environment in close contact with a medium, sound waves are transmitted through the same continuous medium no matter where the position is knocked, so that it can be effectively detected. Therefore, the position of the knock detection device 82 can be arranged at one end that can maximize the arrangement of the electric wire and the visible area of the sub-door 50. At the same time, no matter where the user knocks on the front panel 541, it is possible to detect it through the microphone 8211 in close contact with the same medium.

In detail, the area to which the user applies the knock input may be all areas defined by the front surface of the front panel 541. In addition, most of the front panel 541 except for the edge portion is a see-through area that is substantially selectively transparent, and the knock-on detection device cannot be disposed.

Accordingly, it is preferable that the knock detection device 82 is located in the area of the bezel 5411 of the front panel 541. In particular, positioning at the lower end of the front panel 541 rather than the left and right sides of the front panel 541 may be a method of minimizing the bezels at the left and right sides and the upper end of the front panel 541. By the shape of the bezel 5411, the see-through area can be expanded, and the see-through area is positioned at a lower portion where the user's gaze is not relatively large, thereby making the see-through area appear wider to the user.

The knock detection device 82 is located in the area of the bezel 5411 so that it is not exposed to the outside, but has a structure in close contact with the front panel 541 so that the user can locate a certain position of the front panel 541 Even if it knocks, it becomes possible to detect the user's knock.

On the other hand, in addition to the knock operation, many environmental factors that apply vibration to the front surface of the front panel 541 may be generated. The front surface of the panel assembly 54 may vibrate due to an impact caused by opening and closing of the main door 40 and the sub door 50, strong external noise, etc., and an input by this external environment may be determined as a knock signal. There is also room.

Accordingly, the sensing device PCB 83 may determine that a user taps the front panel assembly 54 multiple times as a normal knock input. More specifically, tapping a plurality of times at a predetermined time interval may be determined as a normal knock input.

For example, when the user taps the front surface of the panel assembly 54 twice within a predetermined time, it may be determined as a normal knock input. Analyzing the knock pattern of a typical user, it can be seen that the interval between the first knock and the second knock is less than about 600 ms. That is, considering that 1 second (s) is 1000 ms, it can be determined as a normal knock input that the first knock and the second knock occur with an interval of less than 1 second.

Therefore, by setting such a time interval, it is possible to significantly prevent an abnormal input from being mistaken as a knock signal.

Meanwhile, the knock intensity may vary for each user. However, since the medium is the same, the variation in intensity may be large, but it can be seen that the variation in the vibration pattern is very small. Accordingly, the deviation of the knock intensity can be canceled through an algorithm, and a normal knock input can be effectively recognized by using the knock input pattern and the time interval between the knock as a factor.

On the contrary, this means that recognizing an abnormal input as a knock input can be significantly reduced.

Meanwhile, a door opening assistance device 588 is provided under the door liner 58. The door opening auxiliary device 588 includes an elastic member receiving portion 581 recessed into the door liner 58, the elastic member 824 accommodated in the elastic member receiving portion 5881, and the elastic member It may be composed of a pressing member 5883 supported by the 5882.

In a state where no external force is applied, the pressing member 5883 is supported by the elastic member 5802 and protrudes from the door liner 58 as shown in FIG. 33. Therefore, when the sub-door 50 is closed, the pressing member 5883 contacts the main door 40 and compresses the elastic member 5802. When the user operates the operation button 231 of the handle 23 to open the sub door 50 while the sub door 50 is closed, the locking unit 232 and the restraining member 404 The coupling is released, and the sub-door 50 is rotated and opened by the elastic force of the elastic member 5802.

Hereinafter, the operation of the refrigerator having the above configuration will be described.

34 is a block diagram showing a flow of a control signal of the refrigerator. And, FIG. 35 is a flow chart sequentially showing operation of the sub-door of the refrigerator. And, FIG. 36 is a perspective view of the refrigerator before a knock operation. And, FIG. 37 is a perspective view of the refrigerator after a knock operation.

As shown in the drawing, the refrigerator 1 includes a main control unit 2 for controlling the operation of the refrigerator, and the main control unit 2 may be connected to a door switch 21. The door switch 21 is provided in the cabinet 10 to detect the opening of the refrigerating compartment door 20 or the main door 40, and is provided in the main door 40 to the sub-door 50 You can also detect the opening of.

In addition, the main control unit 2 may be connected to the door lighting unit 49 to be turned on when the sub-door 50 is opened or when a knock-on signal is input. In addition, the main control unit 2 may be connected to the detection device PCB 83 connected to the knock detection device 82.

Meanwhile, the refrigerator 1 may be in a mirror-like state with the panel assembly 54 in an opaque state as shown in FIG. 36 in a general situation where there is no separate operation. In such a state, it becomes impossible to see the interior of the chamber.

In this state, the knock detection device 82 is activated and maintains a state in which a user's manipulation input is possible at any time. [S110]

In such a state, in order for the user to check the food storage state in the refrigerator, when a knock-on operation in which the front of the sub-door 50 is knocked, that is, the front panel 541 is performed in front of the refrigerator, the knock detection device ( 82) detects this, and the detection device PCB 83 determines whether a knock-on operation is a valid operation.

In detail, when the user taps the front panel 541, the wavelength of the vibration generated at this time is moved along the front panel 541, which is the same medium, and the sound wave is transmitted from the microphone 8211 in close contact with the front panel 541. Will receive.

The received sound wave is filtered and amplified while passing through the filter and amplifier, and transmitted to the detection device PCB 83, and the detection device PCB 83 determines a knock with the collected and analyzed signal to detect the knock signal. do.

That is, in the case of a sound wave generated by noise or impact inside or outside the chamber, there is a difference between the sound wave generated by knock and its characteristics, and therefore, the detection device PCB 83 through a signal corresponding to the characteristic of the knock signal It is determined whether the user knocks.

Of course, a signal similar to the knock signal may be generated in a specific situation, an impact similar to the knock may be generated on the front panel 541 due to the user's carelessness or inexperience, and external noise may be similar to the wavelength of the knock signal. It could be perceived as a signal.

In order to prevent misrecognition in such a special situation, the detection device PCB 83 checks whether the knock signal is continuously generated by a set pattern, and determines whether this pattern occurs within a set time.

For example, in order to be detected as a valid knock-on signal, a signal recognized as knock may be set to be generated twice within 1 second. Usually, as a result of analyzing the knock pattern of a general user, knocking is performed twice in a row, and the time interval falls within 1 second, so if you set this way, you can prevent misrecognition in special situations and accurately recognize the user's knock operation. You can do it. Of course, the number of knock signals and the set time to be determined as such an effective knock-on signal may be variously changed.

When it is determined that an effective knock-on signal has not been generated through the knock detection device 82, the main control unit 2 maintains a standby state without performing a separate control operation.

In addition, when the main door 40 or the sub door 50 is open, the knock detection device 82 may be deactivated or an input signal may be ignored to prevent a malfunction. [S120]

On the other hand, when an effective knock-on signal is detected and the effective signal is transmitted from the detection device PCB 83 to the main control unit 2, the main control unit 2 turns on the door lighting unit 49.

When the door lighting unit 49 is turned on, the inside of the opening 403 becomes bright, and the light inside the cabinet passes through the panel assembly 54. In particular, as the front panel 541 passes through the front panel 541, the front panel 541 becomes transparent, and as shown in FIG. 37, the inside can be seen.

When the sub-door 50 becomes transparent, the user can check the storage space or the interior space of the main door 40, and open the sub-door 50 or perform a necessary operation to store food. [S130]

The lighted door lighting unit 49 maintains the lighted state for a set time, for example, 10 seconds, so that the user can sufficiently check the state of the interior.

In addition, it is determined whether a set time has elapsed while the door lighting unit 49 is turned on, and when the set time has elapsed, the door lighting unit 49 is turned off. [S140]

In addition, an effective knock-on operation signal may be input by a user before a set time elapses while the door lighting unit 49 is turned on.

That is, when a user performs a knock-on operation to check the interior of the interior and does not require a separate operation after checking the interior of the interior, the door lighting unit 49 may be turned off before the set time elapses.

For example, if the user wants to make the sub-door 50 opaque within 5 seconds after the door lighting unit 49 is turned on while the user checks the storage state in the cabinet, the sub-door 50 The front panel 541 is knocked.

If it is determined that the knock operation at this time is effective, the door lighting unit 49 may be turned off before the set time elapses. Of course, the determination of the validity of the knock operation at this time may be set in the same manner as in [S120], or may be set to another knock input pattern if necessary. [S150]

When a set time elapses after the door lighting unit 49 is turned on or an effective knock-on signal is input, the door lighting unit 49 may be turned off.

When the door lighting unit 49 is turned off, the interior of the interior becomes dark and the exterior of the interior becomes bright. In such a state, light from the high and external sides is reflected from the front panel 541 so that the front of the sub-door 50 is like a mirror, and it is impossible to see the inside. Therefore, the sub-door 50 remains opaque until a new operation is input. [S160]

Claims (16)

A cabinet forming a storage space; And
And a door for opening and closing the storage space,
The door,
A door frame including an out plate having an opening and a door liner connected to the out plate;
A panel assembly covering the opening;
It includes a support frame connecting the out plate and the panel assembly,
The door frame and the panel assembly form an insulating space filled with an insulating material,
The support frame is located in the heat insulating space, the heat insulating material covers the support frame,
The panel assembly,
A front panel forming a front exterior of the door;
An insulation panel disposed at a rear spaced apart from the front panel;
It includes a gap bar disposed between the front panel and the insulation panel,
The support frame,
A first surface corresponding to one surface of the door frame,
Including a second surface corresponding to the rear surface of the front panel,
The front panel includes a front surface and a rear surface, and a side surface connecting the front surface and the rear surface,
The out plate is a refrigerator including a plate bent portion corresponding to a side surface of the front panel. delete The method of claim 1,
The front panel is formed of a glass material, and the out plate is formed of a metal material. The method of claim 1,
The second surface of the refrigerator is in contact with the rear surface of the front panel. The method of claim 1,
One surface of the door frame is one surface of the plate bent portion. The method of claim 5,
The front panel and the insulation panel are arranged in a first direction,
A length of the plate bent portion in a first direction is longer than a length of a side surface of the front panel in a first direction. The method of claim 5,
A refrigerator where the first and second surfaces intersect. The method of claim 5,
The second surface of the support frame is located between the plate bent portion and the interlayer. The method of claim 5,
The support frame is a refrigerator including a plate insertion portion into which the plate bent portion is inserted. The method of claim 5,
The support frame includes a constraining protrusion,
The plate bent portion is a refrigerator including a hole into which the constraining protrusion is inserted. The method of claim 5,
The front panel is a refrigerator positioned within an area formed by the plate bent portion. A cabinet forming a storage space; And
And a door for opening and closing the storage space,
The door,
A door frame having an opening;
A panel assembly covering the opening;
It includes a support frame connecting the door frame and the panel assembly,
The door frame and the panel assembly form an insulating space filled with an insulating material,
The support frame is located in the heat insulating space, the heat insulating material covers the support frame,
The panel assembly,
A front panel forming a front exterior of the door;
An insulation panel disposed at a rear spaced apart from the front panel;
It includes a gap bar disposed between the front panel and the insulation panel,
The support frame,
A first surface corresponding to one surface of the door frame,
Including a second surface corresponding to the rear surface of the front panel,
The front panel includes a bezel,
The second surface is a refrigerator disposed at a position corresponding to the bezel. The method of claim 1,
The door further includes a knock detection device for detecting a knock applied to the front panel,
The support frame includes a hole in which the knock detection device is positioned so that the knock detection device contacts a rear surface of the front panel. The method of claim 13,
The knock detection device includes a microphone for sensing sound waves, and a microphone accommodating part accommodating the microphone,
The microphone receiving part is in contact with a rear surface of the front panel, and the microphone is spaced apart from the rear surface of the front panel. The method of claim 13,
The frame includes an out plate having the opening and a door liner connected to the out plate,
A refrigerator in which an opening through which the knock detection device passes is formed in the door liner. The method of claim 15,
A refrigerator further comprising a cover covering the opening.

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