JP2019132568A - refrigerator - Google Patents

Abstract

To reduce costs by simplifying the structure of a vacuum heat insulation material arranged around a space provided between an outer case and inner case of a refrigerator to store electrical components and suppress heat leakage amount generated around the space for storing the electrical components.SOLUTION: A refrigerator is provided with a storage section for storing a control substrate for controlling the operation of the refrigerator and electrical components such as a power source substrate and a protection lid for protecting the storage section in a space which is formed of an outer case and an inner case and is provided with a heat insulation member. The refrigerator has a structure for fixing the electrical components to a bottom surface of the storage section. When an angle formed by the bottom surface of the storage section and the outer case is θ, a length of the electrical components is L1, a projection height of the electrical components on the outer case is T1, and a safety distance from the electrical components up to the outer case or the protection lid is t, a relation: (formula) sinθ≤(T1+t)/L1 is satisfied.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a refrigerator.

  Conventionally, a heat insulation box and a heat insulation door of a refrigerator are formed with a heat insulation material in a space between an outer box and an inner box with a vacuum heat insulating material and a rigid urethane foam having bubbles, and are provided inside the heat insulation box. Electrical components such as a control board and a power supply board for controlling the operation of the refrigerator are accommodated in the space.

  Conventionally, the space for storing the electrical components inside the heat insulation box has been provided in the same place as the space for the heat insulation material between the outer box and the inner box of the heat insulation box. Will reduce the thickness of the insulation. In order to cope with such a situation, a structure in which a vacuum heat insulating material having high heat insulating performance is placed on a priority basis has been used (Patent Document 1).

JP 2009-228917 A

  However, since the shape of the periphery of the space for storing the electrical components is complicated, the structure of the vacuum heat insulating material is complicated to cover the space without any gap, and this increases the cost. On the other hand, when the arrangement of the vacuum heat insulating material is simplified in order to suppress the cost increase, there is a portion with low heat insulating performance, and the amount of heat leakage increases.

    The present invention for solving the above-described problems is that a vacuum heat insulating material is disposed in a space formed by an outer box and an inner box and along the outer box or the inner box, and the space is filled with a foam heat insulating material. In the refrigerator comprising a heat insulation box provided with a heat insulation member, electrical components such as a control board and a power supply board for controlling the operation of the refrigerator in a space in which the heat insulation member formed by the outer box and the inner box is provided And a protective lid for protecting the storage portion, and the electric component is fixed to the bottom surface of the storage portion. The angle formed between the bottom surface of the storage portion and the outer box is θ, When the length is L1, the projected height of the electric component onto the outer box is T1, and the safety distance between the electric component and the outer box or the protective lid is t, the relationship of Expression (1) is satisfied.

  ADVANTAGE OF THE INVENTION According to this invention, simplifying the structure of the vacuum heat insulating material arrange | positioned around the space which accommodates the electrical component provided between the outer box and the inner box, ensuring the volume of the food storage space inside a refrigerator. Therefore, it is possible to provide a refrigerator that can reduce the cost and suppress the amount of heat leakage that occurs in the vicinity of the space for storing electrical products.

FIG. 3 is a front view of the refrigerator according to the first embodiment. 2 is a cross-sectional view of the refrigerator of Example 1. FIG. FIG. 3 is a layout diagram of electrical components of the first embodiment. FIG. 6 is a layout diagram of electrical components of Example 2. FIG. 6 is a layout diagram of electrical components of Example 3.

  Embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a front view of the refrigerator according to the first embodiment, and FIG. 2 is a cross-sectional view taken along the line AA in FIG.

  The refrigerator main body 1 is equipped with the heat insulation box 2 and the heat insulation doors 3a, 3b, 4a, 4b, 5, 6 as main components. This heat insulation box 2 consists of a top surface, a bottom surface, both side surfaces, and a back surface, and the front surface has an open box shape. And the heat insulation box 2 has the refrigerator compartment 7, the ice making room 8a, the upper freezer compartment 8b, the freezer compartment 9, and the vegetable compartment 10 in this order from the top, as shown in FIG.

  The heat insulating doors 3a to 6 are doors that close the front opening portions of the respective chambers 7 to 10. Refrigeration room doors 3a and 3b, ice storage room door 4a and upper freezing room door 4b, freezing room door 5 and vegetable room door 6 are arranged corresponding to each room 7-10. The refrigerator compartment doors 3a and 3b are double doors that rotate around the hinge 11, and all the doors other than the refrigerator compartment doors 3a and 3b are drawer type doors. When these drawer-type doors 4 to 6 are pulled out, the containers constituting each chamber are pulled out together with the doors. Each of the doors 3 to 6 includes a packing (not shown) for sealing the heat insulating box 2. This packing is attached to the indoor side outer periphery of each door 3-6.

  Moreover, between the refrigerator compartment 7, the ice making room 8a, and the upper stage freezer compartment 8b, the heat insulation partition 12 for partition heat insulation is arrange | positioned. The heat insulating partition 12 is a heat insulating wall having a thickness of about 30 to 50 mm, and is made of foamed polystyrene, foamed heat insulating material (for example, urethane foam), vacuum heat insulating material, or the like, either alone or in combination with a plurality of heat insulating materials. . In addition, since the temperature zone is the same between the ice making chamber 8a and the upper freezing chamber 8b and the lower freezing chamber 9, a partition member 13 that forms a packing receiving surface is provided instead of a heat insulating partition that performs heat insulation. Between the lower freezer compartment 9 and the vegetable compartment 10, the heat insulation partition 14 for partition heat insulation is provided. This heat insulation partition 14 is a structure similar to the heat insulation partition 12, and is a heat insulation wall of about 30-50 mm. Insulation partitions are basically installed in partitions of rooms with different storage temperature zones such as refrigeration and freezing.

  In the heat insulation box 2, storage compartments for the refrigerator compartment 7, the ice making compartment 8 a and the upper freezer compartment 8 b, the lower freezer compartment 9, and the vegetable compartment 10 are respectively formed from above. Is not particularly limited to this. Further, the refrigerator doors 3a and 3b, the ice making door 4a, the upper freezer compartment door 4b, the lower freezer compartment door 5 and the vegetable compartment door 6 are also particularly limited in terms of opening and closing by rotation, opening and closing by drawers, and the number of divided doors. is not.

  The heat insulation box 2 includes a metal outer box 15 and a synthetic resin inner box 16, and a heat insulating portion is provided in a space formed by the outer box 15 and the inner box 16 to connect each storage chamber and the outside. Insulated. A vacuum heat insulating material 17 is arranged along the inner side of the outer box 15 or the inner box 16, and a space other than the vacuum heat insulating material 17 is filled with a foam heat insulating material 18 such as hard urethane foam to constitute a heat insulating portion.

  The outer box 15 is formed in a box shape including a top surface, a bottom surface, both side surfaces, and a back surface by welding a folded steel plate or a flat steel plate. The inner box 16 is formed in a box shape including a top surface, a bottom surface, both side surfaces, and a back surface by molding a synthetic resin plate.

  In order to cool the refrigerator compartment 7 to a predetermined temperature, a cooler 19a is provided on the back side of the refrigerator compartment 7 to cool the ice making chamber 8a, the freezer compartment 9, the vegetable compartment 10 and the like to a predetermined temperature. On the back side of the ice making chamber 8a and the freezing chamber 9, a cooler 19b is provided. The coolers 19a and 19b, the compressor 20, a condenser (not shown), and a capillary tube (not shown) are connected to constitute a refrigeration cycle. Blowers 21a and 21b are disposed above the coolers 19a and 19b to circulate the cold air cooled by the coolers 19a and 19b in the refrigerator and maintain a predetermined low temperature.

  In the rear part of the top surface of the heat insulation box 2, a storage unit 23 for storing electrical components 22 such as a control board and a power supply board for controlling the operation of the refrigerator body 1 and the compressor 20 and the fans 21 a and 21 b. The electrical component 22 is fixed to the bottom surface 24 of the storage portion 23. As a result, the top surface of the outer box 15 has a three-dimensional shape formed by the storage unit 23. The electrical component 22 is a self-heating component that generates a large amount of heat. The storage unit 23 is provided with a protective lid 25 that protects the electrical component 22 and the storage unit 23. The height of the protective lid 25 is arranged so as to be substantially the same height as the top surface of the outer box 15 in consideration of appearance design and securing the internal volume. When the height of the protective lid 25 protrudes from the top surface of the outer box, it is desirable to keep it within a range of 10 mm. Since the storage portion 23 is in a state where only the space for storing the electrical component 22 is recessed on the side of the foam heat insulating material 18, the internal volume is sacrificed when the foam heat insulating material 18 is made thick to ensure the heat insulating performance of this portion. End up. On the contrary, if it is going to secure an internal volume, the thickness of the foam heat insulating material 18 between the accommodating part 23 and the inner box 16 will become thin, and heat insulation performance will worsen.

  From these things, the vacuum heat insulating material 17 is arrange | positioned in the surface at the side of the foam heat insulating material 18 of the accommodating part 23, and the heat insulation performance is strengthened. Specifically, the single vacuum heat insulating material 17 is installed so that the vacuum heat insulating material 17 straddles the bottom surface 24 of the storage unit 23.

  A machine room 26 is formed at the rear of the bottom surface of the heat insulating box 2 over the entire left and right width. In the machine room 26, a compressor 20 and a condenser (not shown) are arranged. The compressor 20 and the condenser are self-heating parts that generate a large amount of heat. Therefore, in order to prevent heat from entering from the machine room 26 into the cabinet, a single three-dimensional vacuum heat insulating material (not shown) is arranged on the projection surface toward the inner box 16 side.

  3 is an enlarged view of the upper part of the AA cross section in FIG. In the present embodiment, the angle θ formed by the top plate portion of the outer box 15 and the bottom portion 24 of the storage portion 23 is made as sharp as possible, and the bottom portion 24 of the storage portion 23 is prevented in order to prevent the heat generated by the electrical component 22 from entering the refrigerator compartment 7. It has a structure that simplifies the mounting structure of the vacuum heat insulating material 17 and prevents heat leakage. Specifically, the length in the front-rear direction of the electrical component 22 stored in the storage unit 23 is L1 (for example, 120 mm), the rear projection height of the outer plate of the electrical component 22 is T1 (for example, 40 mm), and the electrical component 22 When the safety distance in consideration of the contact with the protective cover on the upper part of the electrical component 22 and electrical insulation is t (for example, 30 mm), the following formula (1) is satisfied.

  Since the volume of the storage portion 23 can be minimized by setting the angle θ to such an angle θ, it is possible to secure a space for filling the foam heat insulating material 18 and a volume of the refrigerator compartment 7, and Since the angle θ formed between the top plate portion of the plate 15 and the bottom portion 24 of the storage portion 23 can be sharpened, the arrangement of the vacuum heat insulating material 17 provided along the bottom surface 24 can be simplified.

  4 is an enlarged view of the upper part of the AA cross section in FIG. In the present embodiment, the angle θ formed by the top plate portion of the outer box 15 and the bottom portion 24 of the storage portion 23 is made as sharp as possible, and the bottom portion 24 of the storage portion 23 is prevented in order to prevent the heat generated by the electrical component 22 from entering the refrigerator compartment 7. It has a structure that simplifies the mounting structure of the vacuum heat insulating material 17 and prevents heat leakage. Specifically, the intersection of the bottom surface 24 of the storage unit 23 and the top plate part of the outer plate 15 and the length to the electrical component 22 stored in the storage unit 23 are L2 (for example, 200 mm), and the substrate of the electrical component 22 is When the thickness is T2 (for example, 2 mm), the following formula (2) is satisfied.

  Since the volume of the storage portion 23 can be minimized by setting the angle θ to such an angle θ, it is possible to secure a space for filling the foam heat insulating material 18 and a volume of the refrigerator compartment 7, and Since the angle θ formed between the top plate portion of the plate 15 and the bottom portion 24 of the storage portion 23 can be sharpened, the arrangement of the vacuum heat insulating material 17 provided along the bottom surface 24 can be simplified.

  FIG. 5 is an enlarged view of the upper part of the AA cross section in FIG. In the present embodiment, the angle θ formed by the top plate portion of the outer box 15 and the bottom portion 24 of the storage portion 23 is made as sharp as possible, and the bottom portion 24 of the storage portion 23 is prevented in order to prevent the heat generated by the electrical component 22 from entering the refrigerator compartment 7. It has a structure that simplifies the mounting structure of the vacuum heat insulating material 17 and prevents heat leakage. Further, in order to minimize the volume of the storage portion 23 and to provide more heat insulation structure for preventing the heat generated by the electrical component 22 from entering the refrigerator compartment 7, a step portion is provided in the storage portion 23 from the front of the electrical component 22. 27 is provided. Specifically, the length in the front-rear direction of the electrical component 22 stored in the storage unit 23 is L1 (for example, 120 mm), the rear projection height of the outer plate of the electrical component 22 is T1 (for example, 40 mm), and the electrical component 22 When the safety distance in consideration of contact with the protective cover on the upper part of the electrical component 22 and electrical insulation is t (for example, 30 mm), the following formula (3) is satisfied.

  Since the volume of the storage portion 23 can be minimized by setting the angle θ to such an angle θ, it is possible to secure a space for filling the foam heat insulating material 18 and a volume of the refrigerator compartment 7, and Since the angle θ formed between the top plate portion of the plate 15 and the bottom portion 24 of the storage portion 23 can be sharpened, the arrangement of the vacuum heat insulating material 17 provided along the bottom surface 24 can be simplified. Furthermore, by providing the step portion 27 in the storage portion 23 from the front side of the electrical component 22, it becomes possible to fill the front portion of the storage portion 23 with the foam heat insulating material 18, and to further reduce the amount of heat leakage. it can.

  According to the refrigerator according to the embodiment as described above, the vacuum heat insulating material arranged around the space for storing the electrical components provided between the outer box and the inner box while securing the volume of the food storage space inside the refrigerator. Thus, it is possible to provide a refrigerator in which the cost is reduced by simplifying the structure and the amount of heat leakage generated around the space for storing the electrical components is suppressed.

  In addition, although the said Example has described as the case where the storage part which accommodates an electrical component is provided in the heat insulation box upper part, the site | part which provides a storage part is the right-and-left side part of a heat insulation box, a rear surface part, a lower surface part You may provide in a part.

DESCRIPTION OF SYMBOLS 1 Refrigerator main body 2 Heat insulation box 3a, 3b Heat insulation door 4a, 4b Heat insulation door 5 Heat insulation door 6 Heat insulation door 7 Refrigeration room 8a Ice making room 8b Upper freezing room 9 Freezing room 10 Vegetable room 11 Hinge 12 Heat insulation partition 13 Partition member 14 Heat insulation partition 15 Outer box 16 Inner box 17 Vacuum heat insulating material 18 Foam heat insulating material 19a, 19b Cooler 20 Compressor 21a, 21b Blower 22 Electrical component 23 Storage part 24 Storage part bottom face 25 Protective lid 26 Machine room 27 Step part

Claims (3)

A heat insulating box body in which a vacuum heat insulating material is disposed in a space formed by the outer box and the inner box and along the outer box or the inner box and a heat insulating member is provided by filling the space with a foam heat insulating material. In the refrigerator comprising
In a space where a heat insulating member formed by the outer box and the inner box is provided, a storage unit for storing electric parts such as a control board and a power supply board for controlling the operation of the refrigerator and a protective cover for protecting the storage part are provided. , And a structure for fixing the electrical component to the bottom surface of the storage unit,
The angle formed by the bottom surface of the storage portion and the outer box is θ, the length of the electric component is L1, the projected height of the electric component onto the outer box is T1, the electric component and the outer box, or the protective lid When the safety distance to is t, formula (1)

A refrigerator characterized by satisfying the relationship. The refrigerator according to claim 1,
When the angle between the bottom surface of the storage unit and the outer box is θ, the distance from the intersection of the bottom surface of the storage unit and the outer box to the electrical component is L2, and the thickness of the substrate of the electrical component is T2, Formula (2)

A refrigerator characterized by satisfying the relationship.   The refrigerator according to claim 1, wherein a step is provided between the bottom surface of the storage unit and the intersection of the outer box.

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