Refrigerator

Abstract

A refrigerator includes a heat-insulating box having a plurality of storage chambers, and an upper-layer door and a lower-layer door each having a movable rail for supporting a drawer-type container, the upper-layer door and the lower-layer door being disposed so as to open and close two vertically adjacent storage chambers among the plurality of storage chambers, a gap being provided between the upper-layer door and the lower-layer door, and the gap being provided between the upper-layer door and the lower-layer door. The movable rails of the upper-layer door and the lower-layer door are supported by rollers provided on the inner walls of the storage chambers so as to be movable back and forth, the rollers are supported by support plates provided on the inner walls of the storage chambers, and the support plate of the upper-layer door is formed of a steel material having a Young's modulus of 250 GPa or more. When the upper-layer door and the lower-layer door are fully opened in a state in which the contents having the maximum allowable mass are accommodated in the container with the upper-layer door, a prescribed gap is left between the upper-layer door and the lower-layer door. Therefore, deformation of the supporting plate of the roller corresponding to the upper layer door of the upper layer door and the lower layer door which are adjacent vertically can be restrained, the descending amount of the roller can be reduced, contact between the upper layer door and the lower layer door can be prevented, the gap between the doors is small, and the refrigerator is high in appearance design.

Description

Technical Field

[0001] The present disclosure relates to a cold storage. Background Art

[0002] In a refrigerator, a double door or a drawer door is used as a door for taking out food and the like stored in storage rooms divided into a freezer room, a refrigerator room, a vegetable room, and the like.

[0003] Patent document 1 discloses a structure in which, in a cold storage, the clearance between the fixed rail and the movable rail can be reduced by fixing the fixed rail of a rail component in which the fixed rail and the movable rail are pre-installed to the vertical portion of a reinforcing component provided on a partition wall serving as a position limiting component, and then supporting the container on the rail component, thereby forming a high-quality drawer with less looseness.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2005-265245 Summary of the invention

[0007] Problems to be solved by the invention

[0008] In recent years, there has been a preference for refrigerators designed to have a smaller gap between doors to enhance the overall sense of unity.

[0009] Generally speaking, in a refrigerator, when a drawer door is opened with a large amount of food stored in a drawer container, the support portion of the rollers on the storage chamber wall that supports the weight of the drawer container and food may be deformed and the drawer door may drop. This is particularly noticeable when the drawer door is fully opened.

[0010] Therefore, for example, in a storage room layout where sliding doors are arranged up and down with a narrow gap between them, if a large amount of food is stored in the upper sliding door and the position of the roller is lowered, there is a risk of the sliding doors touching each other when both the upper and lower sliding doors are fully opened.

[0011] In order to prevent the sliding door from contacting, it is required to adopt a structure that increases the gap to a degree that the roller does not contact even when it descends, a structure that suppresses the roller from descending, etc. However, from the viewpoint of emphasizing design as described above, it is difficult to adopt the former.

[0012] In the case of the latter, the component for reinforcing the roller support portion needs to be enlarged, and it is necessary to consider the overall weight reduction of the cold storage and the increase in component costs.

[0013] As a component for supporting the roller (roller support), a plate-shaped component is used and embedded in the side wall of the cold storage together with the heat insulation component. As a material for the roller support, steel is widely used in consideration of strength, rigidity, cost, etc. The rigidity of steel is approximately 200 GPa.

[0014] Patent Document 1 improves the structure of the reinforcing member from the viewpoints of the clearance between the fixed rail and the movable rail and the looseness of the drawer, but does not study the state in which the upper drawing door descends and contacts the lower drawing door.

[0015] The purpose of the present invention is to provide a cold storage with a small gap between doors and a high appearance design, which can suppress the deformation of the support plate of the roller corresponding to the upper door of the upper door and the lower door adjacent to each other, reduce the descending amount of the roller, prevent the contact between the upper door and the lower door, and have a small gap between the doors.

[0016] Means for solving problems

[0017] The cold storage disclosed in the present invention includes an insulated box body having a plurality of storage rooms, and an upper door and a lower door provided with movable rails for supporting pull-out containers, the upper door and the lower door are respectively configured to open and close two storage rooms adjacent to each other in the plurality of storage rooms, a gap is provided between the upper door and the lower door, the movable rails of the upper door and the lower door are supported by rollers provided on the inner walls of each storage room so as to be able to move forward and backward, the rollers are supported by support plates provided on the inner walls of the storage rooms, the support plate of the upper door is formed of steel with a Young's modulus of more than 250 GPa, and is configured to leave a specified interval between the upper door and the lower door when the upper door and the lower door are fully opened in a state where contents with a maximum allowable mass are stored in the container of the upper door.

[0018] Effects of the Invention

[0019] According to the present disclosure, a cold storage can be provided which can suppress the deformation of the support plate of the roller corresponding to the upper door of the upper and lower doors adjacent to each other and reduce the amount of descent of the roller, thereby preventing contact between the upper door and the lower door, having a small gap between the doors and a high appearance design. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a longitudinal cross-sectional view showing the cold storage of the embodiment.

[0021] Figure 2 Yes means Figure 1 A side view of the lower freezer door 105a and the movable tracks and rollers arranged thereon.

[0022] Figure 3 It means support Figure 2 A perspective view of the support plate of the roller is shown.

[0023] Figure 4 It means in Figure 3 A front view of a support plate 300 with rollers installed thereon. DETAILED DESCRIPTION

[0024] Hereinafter, embodiments will be described using the drawings.

[0025] Example

[0026] Figure 1 It is a longitudinal cross-sectional view showing the cold storage of the embodiment.

[0027] In the cold storage 100 shown in the figure, inside the insulated box body 110, as a storage room, from the top, there are a refrigeration room 102, an ice making room 103 arranged side by side, an upper freezer room 104, a lower freezer room 105, and a vegetable room 106.

[0028] In each storage room, a door that can be opened and closed is provided. Among these doors, the refrigerator door 102a, 102b of the refrigerator room 102 is a revolving door that is divided into left and right. The ice-making room door 103a of the ice-making room 103, the upper freezer door 104a of the upper freezer room 104, the lower freezer door 105a of the lower freezer room 105, and the vegetable room door 106a of the vegetable room 106 are pull-out doors that can be opened and closed respectively. The inside of these doors is mainly filled with foamed polyurethane. In addition, each door has a sealing component (not shown) that is tightly attached to the insulating box body 110 to prevent leakage of cold air.

[0029] The ice making chamber door 103a, the upper freezer chamber door 104a, the lower freezer chamber door 105a, and the vegetable chamber door 106a respectively include an ice making chamber container 103b, an upper freezer chamber container 104b, a lower freezer chamber container 105b, and a vegetable chamber container 106b which are integrally drawn out.

[0030] A heat insulating partition wall 127 is provided between the refrigerating chamber 102 and the ice making chamber 103 and the upper freezing chamber 104, and a heat insulating partition wall 128 is provided between the lower freezing chamber 105 and the vegetable chamber 106, so as to cut off the flow of cold air.

[0031] A partition 130 that contacts a sealing member is provided at the front edge of the ice making compartment 103 and between the upper freezing compartment 104 and the lower freezing compartment 105 .

[0032] A cooler 114 is provided at the back of the lower freezing room 105. A freezing room fan 109a is provided above the cooler 114. A refrigerating room fan 109b is provided at the back of the refrigerating room 102. A compressor 124 is provided in the machine room 139.

[0033] The heat-insulating box 110 is formed by filling a foam insulation material (such as foam polyurethane) between an outer box 110a (outer wall) made of a steel plate and an inner box 110b (inner wall) made of a synthetic resin such as ABS resin (acrylonitrile-butadiene-styrene resin). In the heat-insulating box 110, a vacuum insulation material 125 having a lower thermal transmittance than the foam insulation material is partially used. As a result, the reduction in the internal volume is suppressed and the insulation performance is improved. In this embodiment, the vacuum insulation material 125 is arranged on the back, bottom, top and both side surfaces of the heat-insulating box 110, as well as the lower freezer door 105a.

[0034] As the vacuum insulation material 125 , the vacuum insulation panel of the present disclosure can be applied.

[0035] The heat insulating material of the heat insulating partition wall 127 is expanded polystyrene, and the heat insulating material of the heat insulating partition wall 128 is foamed polyurethane.

[0036] A gap 151 is formed between the upper freezer door 104a and the lower freezer door 105a, and a gap 152 is formed between the lower freezer door 105a and the vegetable door 106a. From the perspective of the design of the cold storage, the gaps 151 and 152 are required to be small. Therefore, the upper and lower dimensions of the gaps 151 and 152 are preferably 6 to 8 mm. In this embodiment, the design value is set to 7 mm.

[0037] Figure 2 Yes means Figure 1 A side view of the lower freezer door 105a and the movable tracks and rollers arranged thereon.

[0038] like Figure 2 As shown, a movable track 160 is attached to the lower freezer door 105a.

[0039] The movable rail 160 is supported by a roller 162 and another support portion 163 having a fulcrum 164. The roller 162 is a box bearing. The support portion 163 is provided so as to be slidable on the upper surface of a convex portion provided on the inner wall of the storage chamber of the cold storage 100. The movable rail 160 can rotate around the fulcrum 164 as an axis. The state of the lower freezer door 105a and the movable rail 160 before a load such as food is placed is shown by a dotted line.

[0040] The roller 162 receives the force from the movable rail 160 due to the load, and is slightly lowered from the state shown by the dotted line. Let the amount of descent of the roller 162 at this time be D1, let the amount of descent of the lower freezer door 105a be D, let the total length of the movable rail 160 (the distance from the fulcrum 164 to the inner wall of the lower freezer door 105a) be L, let the distance from the rotation axis of the roller 162 to the inner wall of the lower freezer door 105a be L1, then the following formula (1) is established.

[0041] D:L=D1:(L-L1)……(1)

[0042] For example, if L = 500 mm, L1 = 400 mm, and D1 = 0.3 mm, then D = 1.5 mm. Figure 1 When the initial value (design value) of the upper and lower dimensions of the gap 152 is 6.0 to 8.0 mm, the dimension becomes 4.5 to 6.5 mm.

[0043] As described above, it is preferable to leave a predetermined gap between lower freezer compartment door 105a (upper door) and vegetable compartment door 106a (lower door).

[0044] Figure 3 It means support Figure 2 A perspective view of the support plate of the roller is shown.

[0045] Figure 3 The support plate 300 shown has a horizontal portion 302 and a vertical portion 303. A through hole 301 is provided on the front side (door side) of the support plate 300. The shaft of the roller is fixed to the through hole 301. The support plate 300 is L-shaped as a whole when viewed from the side.

[0046] Figure 4 is from Figure 3 The view from the A direction is Figure 3 A front view of a support plate 300 with rollers installed thereon.

[0047] Figure 4 In the embodiment, the fixed shaft 311 of the roller 310 (box bearing) is fixed to the through hole of the support plate 300 (reference Figure 3 ). When a load is applied to the roller 310, a moment is generated on the support plate 300 via the fixed shaft 311. As a result, the vertical portion 303 of the support plate 300 is twisted in a direction away from the roller 310. At this time, if the Young's modulus of the support plate 300 is high, the deformation of the support plate 300 can be suppressed, and the descending amount of the roller 310 can be reduced.

[0048] The support plate 300 of this embodiment is made of a predetermined electric furnace material (steel material). The Young's modulus of the steel material is 350 GPa. The Young's modulus of ordinary steel materials is about 200 GPa, but the electric furnace material of this embodiment has a very high Young's modulus.

[0049] The electric furnace material has a phosphorus content of 15% by mass or more and a high Young's modulus. On the other hand, if the phosphorus content is too high, the material tends to become brittle, so the phosphorus content in the electric furnace material is preferably 25% by mass or less.

[0050] Regarding the electric furnace material, a higher Young's modulus is preferred because it can reduce the amount of descent of the roller 310, but the upper limit of the Young's modulus is considered to be determined in accordance with the upper limit of the phosphorus content. Therefore, the Young's modulus of the electric furnace material is considered to be 400 GPa or less.

[0051] Like this, by using the electric furnace material with high Young's modulus, it is easy to make the interval of upper door and lower door not become smaller.In addition, because the size of the electric furnace material used in the support plate 300 can be reduced, the cost of parts can be reduced, and the weight of the cold storage can be reduced.

[0052] In addition, although Figure 4 Although not shown in the figure, the support plate 300 is attached to the inner wall of the storage chamber. The inner wall of the storage chamber is sandwiched between the support plate 300 and the roller 310. Figure 1 A foam insulation material 410 is provided between the support plate 300 and the outer wall 410a of the storage chamber. The foam insulation material 410 is foam polyurethane. The thickness of the foam insulation material 410 is preferably not less than 5 mm and not more than 30 mm. In the case of foam polyurethane, it can be injected into a narrow gap, but when the size of the gap is less than 5 mm, injection becomes difficult. If the size of the gap between the support plate 300 and the outer wall 410a of the storage chamber is set to be not less than 5 mm, foam polyurethane can be injected, and a heat insulation layer with a relatively high Young's modulus can be formed.

[0053] On the other hand, the thicker the wall of the heat insulating box is, the larger the size of the gap between the support plate 300 and the outer wall 410a of the storage chamber can be. However, since the capacity of the storage chamber needs to be increased, it is usually set to 30 mm or less.

[0054] In addition, a vacuum heat insulating material may be provided between the support plate 300 and the outer wall 410a of the storage chamber.

[0055] Since the vacuum insulation material has its interior decompressed, the powder etc. filled inside is compacted, and the rigidity (Young's modulus) is improved. In addition, the vacuum insulation material can also be built into a frame (box) that does not deform even if the pressure is reduced. In this case, the rigidity is also high. Therefore, the vacuum insulation material acts as a pressing plate of the support plate 300, which can suppress the deformation of the support plate 300.

[0056] In addition, for Figure 1 The outer box 110a of the refrigerator 100 may be made of a predetermined electric furnace material. In this case, the electric furnace material used preferably has a Young's modulus of 250 GPa or more. By increasing the rigidity of the outer box 110a, the deformation of the outer box 110a of the refrigerator 100 can be suppressed.

[0057] Description of Reference Numerals

[0058] 100: cold storage, 102: cold storage room, 103: ice making room, 104: upper freezer, 104b: upper freezer container, 105: lower freezer, 105a: lower freezer door, 105b: lower freezer container, 106b: vegetable compartment container, 106: vegetable compartment, 106a: vegetable compartment door, 110: heat-insulating box, 125: vacuum insulation material, 127, 128: heat-insulating partition wall, 151, 152: gap, 160: movable rail, 162: roller, 163: supporting part, 164: fulcrum, 300: supporting plate, 301: through hole, 302: horizontal part, 303: vertical part, 310: roller, 311: fixed axis.

Claims

1. A cold storage, characterized in that: include: an insulated box having a plurality of storage compartments; and The upper door and the lower door are provided with movable rails for supporting the drawer-type container. The upper door and the lower door are respectively configured to open and close two storage rooms that are adjacent to each other in a vertical direction among the plurality of storage rooms. A gap is provided between the upper door and the lower door, The movable rails of the upper door and the lower door are supported by rollers provided on the inner walls of the storage chambers so as to be movable forward and backward. The roller is supported by a support plate provided on the inner wall of the storage chamber. The support plate of the upper door is formed of a steel material having a Young's modulus of more than 250 GPa. When the upper door and the lower door are fully opened in a state where the contents having the maximum allowable mass are stored in the container of the upper door, a predetermined interval is left between the upper door and the lower door.

2. The cold storage as claimed in claim 1, characterized in that: The steel material has a phosphorus content of 15% or more and 25% or less based on mass.

3. The cold storage as claimed in claim 1, characterized in that: The steel material is electric furnace material.

4. The cold storage as claimed in claim 1, characterized in that: The upper and lower dimensions of the gap are 6 to 8 mm.

5. The cold storage as claimed in claim 1, characterized in that: A foam heat insulating material is arranged between the support plate and the outer wall of the storage chamber.

6. The refrigerator according to claim 5, characterized in that: The foam insulation material is foam polyurethane.

7. The refrigerator according to claim 6, characterized in that: The thickness of the foam insulation material between the support plate and the outer wall of the storage chamber is 5 mm or more and 30 mm or less.

8. The refrigerator according to claim 1, characterized in that: A vacuum heat insulating material is provided between the support plate and the outer wall of the storage chamber.

9. The refrigerator according to claim 1, characterized in that: The support plate is L-shaped.

10. The refrigerator according to claim 1, characterized in that: The heat-insulating box body comprises an outer box, an inner box and a heat-insulating material arranged therebetween. The outer box is formed of an electric furnace material.

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