JP2013087965A - Extra line housing method of damper device cable for refrigerator and refrigerator using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that removing or installing a twin damper device of a refrigerating chamber causes a wiring cable to be irregularly housed between a fan duct and the damper device and quality is deteriorated for cooling air leakage or the like.SOLUTION: A female connector 50e for a signal power source is provided on a center portion back face 50f of a damper device 50, a cable 53 having a male connector 52 is arranged so as to be pulled out from a cable housing portion 54 in a fan duct 48 corresponding to a bottom face of the center portion of the damper device 50, and the cable 53 is composed planarly. When the damper device 50 is buried in the fan duct 48, the extra line of the cable 53 is housed in the cable housing portion 54 inserting the damper device 50 downward from a state with the cable 53 closely attached between the center portion back face 50f of the damper device 50 and an inserted portion back face 48c of the fan duct 48.

Description

  The present invention relates to a method for storing a wiring cable when a damper device of a refrigerator is attached and detached, and a refrigerator using the storage method.

  FIG. 10 is a perspective view of a conventional cable guide, and FIG. 11 is an explanatory view showing the same use state.

  When not in use, the cable guide 1 is formed in a thin plate shape having a rectangular shape in plan view, and has a main body 1a having a mounting hole 2 as a mounting portion on one end side in the longitudinal direction, and can be bent at a substantially central portion of the main body 1a. And a bent piece 1b provided. The main body 1a has a cable insertion hole 3 (cable locking portion) formed of a rectangular elongated hole inside the attachment hole 2 on one end side, and a similar elongated hole on the other end side. A cable insertion hole 4 (cable locking portion) is formed.

  The bent piece 1b is cut out by a groove 6 having a predetermined width from the one end side to the other end side of the main body 1a with a U-shaped groove 6 in plan view, thereby connecting the upper and lower portions of the cable insertion hole 4 on the other end side. And connected to the main body 1a. The bent piece 1b is formed such that the base end side thereof can be bent with respect to the main body 1a with the connecting portion 7 as a fulcrum, that is, can be elastically deformed manually and can be automatically or manually restored to the original shape. Yes. Also, a cable insertion hole 5 (cable locking portion) is formed on the distal end side of the bent piece 1a. The cable insertion hole 5 is a long hole having the same shape as the cable insertion holes 3 and 4 of the main body 1a.

  The main body 1a and the bent piece 1b are integrally formed of, for example, a resin containing rubber that has no electrical conductivity and has flexibility, or is integrally formed by punching a flexible metal thin plate such as a stainless steel plate. However, from the viewpoint of preventing the cable 8 from being damaged, molding with a resin is preferable. In the case of a thin metal plate, it is preferable to provide a buffer material around the cable insertion holes 3 to 5. Further, the width of the connecting portion 7 of the bent piece 1b, that is, the long hole size of the cable insertion hole 4 is set so that the bent piece 1a can be bent at a predetermined angle, and the length and width of the cable insertion holes 3-5. Is set to a size that allows the connector 9 attached to the tip of the cable 8 to be inserted.

  Next, a method for using the cable guide 1 will be described. First, as shown in FIG. 10A, the cable 8 is formed of a flat cable that is flexible and can be bent (folded). Then, as shown in FIG. 10 (b), for example, one end 8a of the cable 8 is inserted into the cable insertion hole 3 of the main body 1a from the front side and pulled out to the back side. The main body 1a is rotated from the back surface on the other end side to the front surface side and is inserted from the front surface side of the cable insertion hole 4 to the back surface side. Further, the other end side 8 b is inserted from the back surface side of the cable insertion hole 5 of the bent piece 1 b to the front surface side and pulled out to the front surface side of the cable guide 1. Thus, the cable 8 is inserted and locked into the three cable insertion holes 3 to 5 of the cable guide 1 in a folded state.

The cable guide 1 in which the cable 8 is inserted and locked in this way is used as shown in FIG. That is, as shown in FIG. 11 (a), a plurality of component parts 10 and 11 are arranged in a housing (not shown) of the electric device, and a printed circuit board (not shown) provided on the component parts 10 and 11 is provided. ) Are each equipped with a connector (not shown). The mounting hole 2 of the main body 1a of the cable guide 1 is formed in one configuration in a separated state of, for example, the two component components 10 and 11 in which the distance between the two component components 10 and 11 on which the printed board is mounted is relatively wide. A connector 9 on one end side 8a of the cable 8 that is fixed to a predetermined position of the component 10 with a fixing screw 12 via a mounting member 13 and pulled out from the cable insertion hole 3 of the cable guide 1 to the back side is used as the connector of the component 10. Fit.

  Next, the connector 9 on the other end side 8 b of the cable 8 that is folded by the cable guide 1 and pulled out to the surface side of the guide 1 is fitted into the connector of the other component part 11. Thereby, the connector 9 of the printed circuit board of the two component parts 10 and 11 in the separated state is electrically connected by the cable 8. At this time, since the distance between the two component parts 10 and 11 is relatively wide, the bent piece 1b is bent relatively large to the main body 1a, and the fixed side end of the main body 1a is also bent by a predetermined angle, The cable 8 is arranged in a state of being guided by the cable guide 1 in a relatively wide space K2 between the two components 10 and 11.

  Then, from the state shown in FIG. 11 (a), for example, when two components 10 and 11 are brought close to each other and stored in a predetermined position in a relatively narrow space in the housing, FIG. 11 (b) As shown, the component part 10 and the component part 11 are set close to each other and set to a predetermined distance d, so that the cable guide 1 is disposed in the housing in a state of being located in the space K1. At this time, since the main body 1a and the bent piece 1b of the cable guide 1 are formed of a thin plate so as to be elastically deformable, the cable guide 1 is smoothly deformed (restored) according to the interval between the component parts 10 and 11. The cable 8 and the cable guide 1 are regularly and clearly arranged in the space K1, and for example, the cable 8 is not sandwiched between other parts or arranged in a slack state in the space K1.

  That is, according to the cable guide 1, both the component parts 10 and 11 can be arranged in a predetermined space in the housing while maintaining an electrical connection state between the two component parts 10 and 11. 1 in addition to the static guide shown in FIG. 11 (a), in addition to the function of a dynamic guide from FIG. 11 (a) to FIG. Both component parts 10 and 11 can be stored in a predetermined position in the housing (see, for example, Patent Document 1).

  And in the conventional refrigerator, the said cable guide was used and the cable connection of the damper apparatus (equivalent to the component 11) and the refrigerator main body (equivalent to the component 10) was implemented.

JP 2009-213241 A

  However, in the above conventional configuration, when a damper device in the refrigerator compartment is removed, a cable guide that can regularly store a wiring cable is required, resulting in an increase in cost.

  The present invention solves the above-described conventional problems, and when the cable is configured in a flat shape and the damper device is embedded in the air duct, the cable is in close contact between the rear surface of the damper central portion and the wall surface of the air duct. By inserting the damper device downward and storing the cable extra length smoothly and securely in the cable storage part, there is no need to use a separate part for storing the cable, and the cable is connected between the air duct and the damper device. The purpose is to prevent the seal from becoming incomplete due to the packing, etc., and eliminating quality problems such as cold air leakage.

  In order to solve the above-described conventional problems, a method for storing extra length wires of a damper device cable for a refrigerator according to the present invention and a refrigerator using the method include a refrigerator compartment at the top, a freezer compartment at the bottom, and cool air behind the freezer compartment. There is a cooling chamber having a cooler to be generated and a fan forcibly blowing the generated cool air to the respective chambers arranged at the upper portion of the cooler, and a fan duct for blowing cool air to the refrigerating chamber by the fan A damper device embedded in the air duct, and the damper device has a twin flap configuration in which a drive portion is arranged in the center and flaps are arranged on the left and right sides, and a female connector for signal power is provided on the back of the damper device center portion, The cable having a male connector is arranged so as to be drawn out from the cable housing portion in the air duct corresponding to the bottom surface of the damper device central portion, and the cable is planar. When the damper device is embedded in the air duct, the damper device is inserted downward from a state in which the cable is in close contact between the rear surface of the damper device center and the wall surface of the air duct. The long wire is stored in the cable storage portion.

  As a result, the extra length of the cable is smoothly and securely stored in the cable storage part, so that there is no need to use a separate part for storing the cable, and the cable is entangled in the packing between the air duct and the damper device. Incomplete sealing can be prevented, and quality problems such as cold air leakage can be eliminated.

  The refrigerator damper device cable extraneous line storage method of the present invention and the refrigerator using the storage method are provided with a separate part for accommodating the cable by smoothly and surely accommodating the extra length line of the cable in the cable accommodating portion. It is not necessary to use it and the cost can be reduced, and it is possible to prevent the cable from being entangled with the packing between the blower duct and the damper device, and to prevent the seal from becoming incomplete, thereby eliminating quality problems such as cold air leakage.

The longitudinal cross-sectional view of the refrigerator in Embodiment 1 of this invention The front view of the main body in Embodiment 1 of this invention Schematic of the air path in Embodiment 1 of the present invention 1 is an exploded view of a damper device and an air duct in Embodiment 1 of the present invention. The principal part perspective view of the ventilation duct in Embodiment 1 of this invention The perspective view seen from the front of the damper device in Embodiment 1 of the present invention The perspective view seen from the back of the damper device in Embodiment 1 of the present invention (A) Main part sectional drawing before insertion of damper apparatus and ventilation duct in Embodiment 1 of this invention (B) AA sectional drawing of the apparatus (A) Main part sectional drawing after insertion of the damper apparatus and ventilation duct in Embodiment 1 of this invention (B) AA sectional drawing of the apparatus (A) Perspective view of a conventional cable guide (B) Perspective view of the cable guide (A) Explanatory drawing which shows the use condition of the conventional cable guide (B) Explanatory drawing which shows the use condition

The first invention is a refrigerator in the upper part, a freezer room in the lower part, a cooler that generates cold air behind the freezer room, and the generated cool air that is arranged in the upper part of the cooler is forcibly blown to each room And a cooling duct having a fan for blowing cold air to the refrigerating chamber by the fan, and a damper device embedded in the ventilation duct, the damper device having a flap with a drive unit at the center. The female connector for signal power supply is provided at the back of the damper unit center, and the cable having the male connector is pulled out from the cable storage unit in the air duct corresponding to the bottom of the damper unit at the center. The cable is configured to be flat, and when the damper device is embedded in the air duct, the cable is connected to the back of the damper device central portion. Since the damper device is inserted downward from the state where it is in close contact with the wall surface of the air duct and the cable extra length line is stored in the cable storage section, the cable extra length line is smoothly and securely stored in the cable storage section. Therefore, it is not necessary to use a separate part for storing the cable, and the cable is prevented from being entangled in the packing between the air duct and the damper device, thereby preventing the seal from becoming incomplete, thereby preventing quality problems such as cold air leakage. Can be eliminated. Specifically, when the cable is moved, the cable is moved in the left-right direction by moving the damper device downward with the cable made flat and with the cable semi-fixed between the rear surface of the damper device center and the wall surface of the air duct. The cable is moved only in the downward direction, and the surplus cable can be stored in the storage space in a folded state without bending in the left-right direction due to the planar shape in the storage space of the cable storage unit.

  According to a second invention, in the first invention, the cable housing portion is formed in a concave shape so that the cable is housed in the concave portion when the damper device is inserted, and the sealing performance around the damper device is improved. It is possible to reduce the leakage of cold air to the outside.

  According to a third invention, in the first or second invention, packing is provided in parallel with the cable arrangement surface at the back of the center of the damper device, and the cable is attached in the left-right direction by the packing provided in parallel. The movement is restricted, and the extra length line is securely stored in the cable storage portion, so that the sealing performance can be improved and the cold air leakage to the outside can be further reduced.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the cable is formed by forming a plurality of lead wires in a flat shape with an adhesive tape, and the use of the signal line and the power line is different. Even if it is a single wire, it can be collected into a flat shape, and by using the flat shape, the extra length line can be stored in the cable storage portion in a state where it is folded in the left-right direction without bending.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the length of the cable is a minimum length that allows the connector to be attached and detached with the damper device removed. Further, the length of the extra length line can be shortened, and the cable housing portion can be made small.

  A sixth aspect of the present invention is a refrigerator using the extra length line storage method according to any one of the first to fifth aspects. As a result, it is possible to prevent cold air leaks during manufacturing or maintenance of the refrigerator and to reduce quality problems.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a longitudinal sectional view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a front view of a main body according to Embodiment 1 of the present invention, and FIG. 3 is an air path according to Embodiment 1 of the present invention. FIG. 4 is an exploded view of the damper device and the air duct in the first embodiment of the present invention, FIG. 5 is a perspective view of the main part of the air duct in the first embodiment of the present invention, and FIG. 6 is the present invention. FIG. 7 is a perspective view seen from the rear of the damper device according to the first embodiment of the present invention, and FIG. 8A is an embodiment of the present invention. FIG. 8B is a cross-sectional view of the main part before insertion of the damper device and the air duct in the first embodiment, FIG. 8B is a cross-sectional view of the same device, and FIG. 9A is the damper device in the first embodiment of the present invention. FIG. 9B is a cross-sectional view of the main part after insertion of the air duct and FIG. It is a diagram.

In FIG. 1, a heat insulating box 31 of a refrigerator 30 is mainly composed of an outer box 32 using a steel plate and an inner box 33 formed of a resin such as ABS, and inside thereof, for example, a foam insulation such as hard foam urethane. The material 34 is filled and insulated from the surroundings, and is divided into a plurality of storage chambers. The refrigeration chamber 35 is disposed at the top, the switching chamber 36 is disposed below the refrigeration chamber 35, and the freezing chamber 37 is disposed at the bottom.

  The refrigerator compartment door 38 opens and closes the front opening of the refrigerating room 35, the switching room door 39 opens the front opening of the switching room 36, and the freezing room door 40 opens and closes the front opening of the freezing room 37. It is freely pivoted.

  The refrigeration chamber 35 is normally set to 1 ° C. to 5 ° C. at the lower limit of the temperature at which it does not freeze for refrigerated storage, and the switching chamber 36 can be set to change the temperature from the refrigeration temperature zone to the refrigeration temperature zone. Can be set at intervals. The freezer compartment 37 is set in a freezing temperature zone and is usually set at −22 ° C. to −15 ° C. for frozen storage, but for example, −30 ° C. or −25 ° C. to improve the frozen storage state. It may be set at a low temperature.

  Further, the switching chamber 36 and the freezing chamber 37 are vertically partitioned by the first partition wall 41, and the refrigerator compartment 35 and the switching chamber 36 are vertically partitioned by the second partition wall 42.

  A cooling chamber 43 for generating cool air is provided on the back of the freezing chamber 37, and a cooler 44 is provided inside. The cooling chamber 43 is insulated from the freezing chamber 37 by a cover coil 45. A fan 46 that forcibly blows cool air generated above the cooler 44 is disposed, and a defrost heater 47 that defrosts frost and ice adhering to the cooler 44 is provided below the cooler 44. Yes. Specifically, the defrost heater 47 is a glass tube heater made of glass, and in particular, when the refrigerant is a hydrocarbon-based refrigerant gas, a double glass tube heater in which glass tubes are formed in a double manner is adopted for explosion protection. Has been.

  In addition, a duct device 49 having a cooling duct 35 and a blower duct 48 for blowing cool air to the switching chamber 36 is provided on the back surface of the switching chamber 36. The air duct 48 has a refrigerating room air duct 48a for sending cool air to the refrigerating room 35 and a switching room air duct 48b for sending cold air to the switching room 36, which are arranged side by side in the duct device 49 side by side in the vertical direction. ing. A damper device 50 that adjusts the amount of cold air to the refrigeration chamber 35 and the switching chamber 36 is embedded in the duct device 49, and is disposed in and passes through the respective ducts of the refrigeration chamber air duct 48a and the switching chamber air duct 48b. The amount of cold air is controlled separately.

  The cold air discharged from the discharge port 35a of the refrigerating chamber 35 through the refrigerating chamber air duct 48a returns to the cooler 44 through the refrigerating chamber return duct 51a from the return port 35b provided on the lower back surface of the refrigerating chamber 35. The cold air discharged to the switching chamber 36 through the switching chamber air duct 48b is on the back surface of the switching chamber 36, and from the switching chamber return port 36c provided in the lower part of the duct device, through the switching chamber return duct 51b, to the refrigerator compartment return duct. It returns to the cooler 44 through 51a.

  The refrigerating room return duct 51a is arranged side by side with the air duct 48, whereby three ducts of the refrigerating room air duct 48a, the switching room air duct 48b, and the refrigerating room return duct 51a are arranged vertically in the duct device 49. They are arranged side by side.

  The duct device 49 is formed to have a large rear surface height and lateral width dimensions of the switching chamber 36, and the refrigeration chamber air duct 48 a and the switching chamber air duct 48 b are approximately in the center in the lateral width direction of the switching chamber 36, that is, the width direction of the duct device 49. The refrigerating room return duct 51a and the switching room return duct 51b are collectively arranged on one side of the duct device 49 centering on the refrigerating room air duct 48a and the switching room air duct 48b.

  The damper device 50 has a twin flap configuration in which the drive unit 50c is disposed in the center in the refrigerator compartment air duct 48a and the flaps 50a and 50b disposed in the switching chamber air duct 48b on the left and right, and the female connector 50e for signal power supply is the damper device. The central portion back surface 50f is provided with a flat shape, and a damper device frame 50d is provided around the flaps 50a and 50b.

  The damper device 50 is embedded in the air duct 48 so as to be inserted from above. The inserted portion of the air duct 48, the central portion rear surface 50f and the central portion front surface 50g of the damper device 50, and the damper device frame 50d leak cold. It is fitted through a packing (not shown) so that there is no gap.

  The cable 53 having the male connector 52 is arranged to be drawn out from the cable housing portion 54 in the air duct 48 corresponding to the bottom surface of the center portion of the damper device 50 and connected to the female connector 50e. The male connector 52 is housed in a recess in the central back surface 50f of the damper device 50 when connected, and only the cable 53 protrudes from the central back surface 50f of the damper device 50 (FIG. 8).

  The cable storage portion 54 is formed in a substantially rectangular recess shape, and the damper device frame 50d, which is in a state when the insertion of the damper device 50 is completed, is in contact with the inserted portion of the blower duct 48 and the bottom surface of the damper device 50 at the center. There is a space for storing the extra cable between them (FIG. 9).

  The inserted portion back surface 48c of the air duct 48 is formed into a flat shape so that it can slide on the flat surface of the central portion back surface 50f of the damper device 50.

  The cable 53 includes a signal line and a power line, and an integrated flat cable is used, or each lead wire is formed in a flat shape with an adhesive tape. The length of the cable 53 is set to a minimum length that allows the connector to be attached and detached with the damper device 50 removed.

  Further, the packing 55 is provided in parallel with the arrangement surface of the cable 53 on the center back surface 50f of the damper device 50, and is pasted around the vertical direction of the center back surface 50f and the driving portion 50c.

  Next, a method for installing the damper device 50 in the air duct 48 will be described.

  When the damper device 50 is embedded in the air duct 48, the damper device 50 is moved downward from the state in which the cable 53 is sandwiched between the center portion rear surface 50f of the damper device and the inserted portion rear surface 48c of the air duct 48 and closely contacted. Then, it is inserted into the inserted portion of the air duct 48.

  The behavior of the cable 53 at this time will be described with reference to FIGS.

  By moving the damper device 50 downward in a state where the cable 53 is semi-fixed between the center rear surface 50f of the damper device 50 and the inserted portion rear surface 48c of the blower duct 48, the surplus cable 53 is removed from the damper device 50. It is accumulated in the inserted portion of the air duct 48 below the 50.

  Since the cable 53 has a flat shape, the cable 53 is stored in the cable storage portion 54 so as to be overlapped by being restricted by the insertion portion front surface 48d and the insertion portion rear surface 48c without being greatly displaced in the left-right direction during movement. The

When the cable 53 is not planar, the cable 53 moves in the left-right direction and is stored in an irregular shape, so that the possibility of the cable 53 protruding beyond the cable storage portion 54 increases.

  Therefore, since the extra length of the cable 53 can be smoothly and reliably stored in the cable storage portion 54, the cable 53 is entangled in the packing between the air duct 48 and the damper device 50 without using a separate part, and the seal is incomplete. Can be prevented, and quality problems such as cold air leakage can be eliminated.

  Further, since the cable storage portion 54 has a substantially rectangular recess shape, the planar cable 53 is easily folded, and the cable 53 can be stored in the recess more reliably.

  In addition, since the packing 55 is juxtaposed in parallel with the cable 53 arrangement surface of the central portion rear surface 50f of the damper device 50, the cable 53 is restricted from moving in the left-right direction by the side-by-side packing 55. The extra length wire can be securely stored in the cable storage portion 54. In this embodiment, the packing 55 is disposed only on one side of the cable 53. However, if the packing 55 is disposed on both sides, the packing 55 is more reliably restricted from moving in the left-right direction, and the extra-length line is surely connected to the cable storage portion 54. Can be stored.

  In addition, the cable 53 can be formed into a planar shape by forming a plurality of lead wires in a flat shape with an adhesive tape so that even single wires having different uses for signal lines and power lines can be combined into a flat shape. The extra length line can be accommodated in the cable accommodating portion in a folded state without blurring in the left-right direction.

  Further, the length of the cable 53 is set to a minimum length that allows the male connector 52 to be attached / detached with the damper device 50 removed, and the length of the extra length line can be shortened to a minimum, thereby ensuring more reliability. In addition, the cable 53 can be stored and the cable storage portion 54 can be made small.

  In addition, although this embodiment demonstrated the case where a damper apparatus was mounted | worn with the refrigerator compartment ventilation duct and the switching chamber ventilation duct, the storage from which setting temperature differs, such as installing in the ventilation duct of the partial chamber arranged in a refrigerator compartment, and a refrigerator compartment The same can be done for the chamber.

  And the refrigerator using the cable extra length storage method of the said damper apparatus can reduce causing a cold-air leak at the time of manufacture or maintenance of a refrigerator, and can reduce a quality problem, without using another component.

  As described above, the refrigerator according to the present invention can also be applied to household or commercial refrigerators.

30 Refrigerator 35 Refrigeration room 36 Switching room 37 Freezing room 41 First partition wall 44 Cooler 46 Fan 47 Defrost heater 48 Air duct 48a Refrigeration room air duct 48b Switching room air duct 48c Inserted part back face 48d Inserted part front face 49 Duct Device 50 Damper device 50a Flap 50b Flap 50c Drive unit 50d Damper device frame 50g Center front 50f Center back 50e Female connector 51a Refrigeration chamber return duct 51b Switching chamber return duct 52 Male connector 53 Cable 54 Cable storage 55 Packing

Claims (6)

Cooling having a refrigerator compartment at the top, a freezer compartment at the bottom, a cooler for generating cool air behind the freezer compartment, and a fan for forcibly blowing the generated cool air to the chambers arranged at the top of the cooler A twin-flap configuration in which there is a chamber, and a fan duct for blowing cool air to the refrigerator compartment by the fan, and a damper device embedded in the fan duct, the damper device having a drive part at the center and flaps arranged on the left and right And a female connector for signal power supply is provided on the rear surface of the damper device central part, and a cable having a male connector is arranged to be drawn out from a cable housing part in the air duct corresponding to the bottom surface of the damper device central part, and the cable is When the damper device is embedded in the air duct, the cable is connected to the back of the damper device central portion and the air duct when the damper device is embedded in the air duct. Inserted from a state of close contact between the surfaces of the damper device downwardly, refrigerator damper apparatus extra-length wire housing the cables, characterized in that for accommodating the extra length line of the cable in the cable compartment. The method for storing extra length lines of a damper device cable for a refrigerator according to claim 1, wherein the cable storage portion has a recess shape, and the cable is stored in the recess when the damper device is inserted. The extra length line storage method for the damper device cable for a refrigerator according to claim 1 or 2, wherein packing is attached in parallel to the cable arrangement surface at the back of the center of the damper device. The extra length wire storage method for the damper device cable for a refrigerator according to any one of claims 1 to 3, wherein the cable has a plurality of lead wires formed in a planar shape with an adhesive tape. 5. The damper device cable for a refrigerator according to claim 1, wherein the length of the cable is a minimum length that allows the connector to be attached and detached with the damper device removed. Extra length storage method. The refrigerator using the extra length line storage method in any one of Claims 1-5.