JP5784380B2 - refrigerator - Google Patents

Description

  Embodiments of the present invention relate to a refrigerator.

  In recent years, refrigerators are desired to have a large storage capacity due to diversification of eating habits, and power saving is also strongly desired. It is conceivable to improve the heat insulation performance of the cabinet in order to save power in the refrigerator. The cabinet is composed of an outer box, an inner box, and a heat insulating material such as urethane foam filled in between. The thicker the heat insulating material, the better the heat insulating performance, but it can be stored in the refrigerator space. In order to increase the volume, it is necessary to make the heat insulating material thinner.

  Therefore, it is effective to increase the heat insulation performance of the heat insulating material itself in order to satisfy both demands for larger storage capacity and power saving. In addition, it has been proposed to embed a vacuum heat insulating material having glass wool or the like having a high heat insulating performance as a core material in a foamed urethane foam on the ceiling surface, back surface, or side surface of the cabinet (for example, Patent Document 1 below).

JP 2009-24922

  However, in the conventional refrigerator configuration, since the heat insulating material is foam-filled between the inner box and the outer box with the vacuum heat insulating material attached to the outer box, a concave portion that sinks upward is formed in the ceiling wall of the cabinet. If it is, the liquid around the foaming and filling of the heat insulating material between the concave portion and the vacuum heat insulating material becomes poor, and the heat insulating material is liable to be thin, and the desired heat insulating performance may not be obtained.

  The present invention has been made in consideration of the above circumstances, and in a refrigerator in which a vacuum heat insulating material is disposed in a heat insulating material foam-filled in a ceiling wall of a cabinet, a concave portion that sinks upward from the inside of the cabinet to the ceiling wall. An object of the present invention is to provide a refrigerator in which the foam-filled heat insulating material is less prone to lack of thickness even when formed.

The refrigerator of the present embodiment includes a cabinet in which a heat insulating material is foam-filled between an outer box and an inner box, a vacuum heat insulating material provided in the ceiling wall of the cabinet, and an upper side from the inside of the ceiling wall of the cabinet. And the vacuum heat insulating material is disposed so as to avoid an upper position of the concave portion so as to improve a liquid periphery when the heat insulating material is foam-filled .

It is sectional drawing of the refrigerator which concerns on one Embodiment of this invention. It is a principal part enlarged view of FIG. It is a figure which shows the refrigerating cycle of the refrigerator of FIG. It is a figure which shows the heat radiating pipe and vacuum heat insulating material which were arrange | positioned at the cabinet of the refrigerator of FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the refrigerator 10 according to the present embodiment includes a cabinet 16 provided with a heat insulating space between an outer box 12 made of a steel plate and an inner box 14 forming a storage space.

  The storage space formed inside the inner box 14 is partitioned into an upper refrigeration space 20 and a lower refrigeration space 40 by a heat insulating partition wall 17.

  The refrigerated space 20 is a space that is cooled to a refrigeration temperature (for example, 2 to 3 ° C.), and the interior is further divided vertically by a partition wall 21, and a plurality of mounting shelves are provided above the partition wall 21. A refrigerator compartment 22 is provided, and a vegetable compartment 24 in which a drawer-type storage container 26 is arranged below the partition wall 21 is provided.

  As shown in FIG. 1, the ceiling wall 16 c of the cabinet 16 that forms the ceiling surface of the refrigerator compartment 22 has an upper side (that is, a heat insulating space) at a position closer to the front than the central portion in the front-rear direction of the refrigerator compartment 22. A concave portion 30 that is recessed to the side) is formed, and the illumination device 31 is accommodated in the concave portion 30.

  As shown in FIG. 2, the rear wall of the recess 30 is provided with an inclined surface 33 that is inclined forward as it goes upward, and the front wall of the recess 30 is provided with an inclined surface 34 that is inclined backward as it goes upward. ing. In addition, a reinforcing rib 35 is provided on the inner bottom surface of the recess 30, which has a protrusion that protrudes toward the refrigerator compartment 22 and extends in the width direction of the refrigerator 10.

  The lighting device 31 includes a circuit board on which a light source such as an LED is disposed, and is wired to a control board (not shown) for controlling the refrigerator 10 and is controlled when the door 23 of the refrigerator compartment 22 is opened. Control is performed so that the light source is lit by a driving power source supplied from the substrate. In this embodiment, the illuminating device 31 constitutes a heat generating member that generates heat from the drive power supply. Such an illuminating device 31 is fixed in the recess 30 by appropriate locking means such as screwing or claw fitting.

  The recess 30 in which the lighting device 31 is housed is closed at its lower surface opening by a shade 32. The shade 32 is a molded body of highly transparent acrylic resin or the like whose surface is provided with irregularities by applying a texture process or the like, and diffuses light from the light source of the lighting device 31 to irradiate the refrigerator compartment 22. .

  A freezing space 40 disposed below the vegetable compartment 24 via the heat insulating partition wall 17 is a space cooled to a freezing temperature (for example, −18 ° C. or lower), and is small in size with an ice making room 42 equipped with an automatic ice making machine. Freezer compartments (not shown) are provided on the left and right, and a freezer compartment 46 is provided below them.

  A refrigeration cooler 52 that cools the air in the refrigeration space 20 and a refrigeration blower fan 53 that blows the cold air cooled by the refrigeration cooler 52 to the refrigeration chamber 22 and the vegetable compartment 24 are provided at the rear of the refrigeration space 20. Is provided. Further, at the rear part of the freezing space 40, a freezing cooler 54 that cools the air in the freezing space 40, and the cold air cooled by the freezing cooler 54 is sent to the ice making chamber 42, the small freezing chamber, and the freezing chamber 46. A refrigeration blower fan 55 is provided.

  The refrigeration cooler 52 and the refrigeration cooler 54 constitute a refrigeration cycle 50 together with a compressor 51 and a condenser 56 housed in a machine room 19 provided at the lower back of the cabinet 16.

  As shown in FIG. 3, the refrigeration cycle 50 includes a compressor 51 that discharges a high-temperature and high-pressure gaseous refrigerant, a condenser 56 that receives the gaseous refrigerant discharged from the compressor 51 and liquefies heat, and a condenser A switching valve 57 provided on the outlet side of the cooler 56 for switching the refrigerant flow path, a refrigerating cooler 52 and a refrigerating cooler 54, and a refrigerating decompression device 58 as a throttling means for the coolers 52 and 54. The refrigerating cooler 52 and the refrigerating cooler 54 are circulated by circulating the refrigerant discharged from the compressor 51 by connecting them with a refrigerant pipe. Cool down.

  In the refrigerator 10 having the above configuration, the cabinet 16 includes the outer box 12 and the inner box 14 by the foam heat insulating material 13 in a state where the heat radiating pipes 61 and 62 and the vacuum heat insulating materials 11 and 15 are disposed on the heat insulating space side of the outer box 12. And are integrated.

  Specifically, the heat radiating pipes 61 and 62 are refrigerant pipes connecting the outlet side of the condenser 56 and the inlet of the switching valve 57, and the high temperature side through which the liquid refrigerant before being decompressed by the decompression devices 58 and 59 circulates. It constitutes a part of the refrigerant pipe and is fixed to the heat insulating space side of the outer box 12.

  The heat radiating pipe 61 is connected to the outlet side of the condenser 56, and enters the foaming space of the cabinet 16 through the outer box bottom plate 12 a forming the ceiling surface of the machine room 19 as shown in FIG. 4. The heat radiating pipe 61 that has entered the cabinet 16 is provided in a substantially annular shape along one of the side walls 16a of the cabinet 16 along its peripheral edge, and the end of the heat radiating pipe 61 penetrates the outer box bottom plate 12a again. It returns to the machine room 19 and is connected to the heat radiating pipe 62.

  The heat radiating pipe 62 penetrates the outer box bottom plate 12a from one of the left and right sides of the machine room 19 and enters the one side wall 16a of the cabinet 16, and extends upward at the rear end of the one side wall 16a. The switching provided in the machine room 19 is arranged so as to extend downward through the ceiling wall 16c of the cabinet 16 and return to the other side part of the machine room 19 extending downward. It is connected to the inlet of the valve 57.

  Of the heat radiating pipes 62 disposed on the side walls 16a and 16b of the cabinet 16, the portion 62a located outside the storage space, that is, the side surface heat radiating pipe 62a disposed on the side walls 16a and 16b that divides the storage space, The rear ends of the side walls 16a and 16b have a linear shape extending in the vertical direction toward the heat insulating space of the outer box 12. The upper end portions of the side surface heat radiating pipes 62 a disposed in the side walls 16 a and 16 b are bent forward and enter the ceiling wall 16 c of the cabinet 16.

  As shown in FIG. 4, the heat radiating pipe 62 disposed in the ceiling wall 16 c of the cabinet 16 includes bent portions 62 c at both ends in the width direction of the ceiling wall 16 c.

  The bending part 62c extends forward from the rear part of the ceiling wall 16c and is folded back to the vicinity of the center part in the front-rear direction, and has a folded shape protruding forward from the rear part of the ceiling wall 16c. The bent portion 62c having such a shape is provided so as to be elastically deformable in the width direction by elastically deforming so that a pair of side portions 62c-1 extending in the front-rear direction and facing each other in the width direction are close to each other. . The bent portions 62c provided at both ends in the width direction of the ceiling wall 16c are connected to the rear end portion of the ceiling wall 16c by ceiling heat radiating pipes 62b arranged linearly along the heat insulating space side of the outer box 12. Yes.

  Moreover, the vacuum heat insulating materials 11 and 15 are formed by sealing a core material made of cotton-like glass fiber in a vacuum state into a gas barrier container made of a laminated film containing an aluminum foil in a vacuum state. 11 is provided on the ceiling wall 16 c of the cabinet 16, and the vacuum heat insulating material 15 is provided on the left and right side walls 16 a and 16 b of the cabinet 16.

  The vacuum heat insulating material 11 provided on the ceiling wall 16c of the cabinet 16 is provided between the concave portion 30 provided on the ceiling wall 16c and the ceiling heat radiating pipe 62b in the front-rear direction, and provided in the heat radiating pipe 62 in the width direction. Between the bent portions 62c. That is, the vacuum heat insulating material 11 is disposed so as to avoid the upper position of the concave portion 30 provided in the ceiling wall 16c, and to avoid the bending portion 62c and the ceiling heat radiating pipe 62b. A heat radiating pipe 62 is disposed on the surface. Moreover, the rear wall which adjoins the vacuum heat insulating material 11 among the surrounding walls of the recessed part 30 makes the inclined surface 33 which inclines forward, so that it goes upwards so that the space | interval with the front-end part of the vacuum heat insulating material 11 may be ensured widely. Yes.

  In this embodiment, as shown in FIG. 2, the outer diameter dimension X of the bending part 62c provided in the ceiling wall 16c of the cabinet 16 and the ceiling heat radiating pipe 62b of the vacuum heat insulating material 11 provided in the ceiling wall 16c. The thickness is smaller than Y. Thereby, the bending part 62c and the ceiling heat radiating pipe 62b provided in the ceiling wall 16c of the cabinet 16 are contained in the range of the vacuum heat insulating material 11, and do not protrude below the vacuum heat insulating material 11. Further, below the vacuum heat insulating material 11 and behind the concave portion 30, there is no bent portion 62c and ceiling heat radiating pipe 62b provided on the ceiling wall 16c.

  The vacuum heat insulating material 15 provided on one of the left and right side walls 16a and 16b of the cabinet 16 where the heat radiating pipe 61 is disposed is provided on the surface facing the outer box 12 as shown in FIG. A pair of concave grooves 15a which are depressed larger than the outer dimensions of 61 and extend in the vertical direction are provided. The vacuum heat insulating material 15 provided with the concave groove 15a is fixed to the outer box 12 so that the heat radiating pipe 61 is sandwiched between the outer casing 12 in the concave groove 15a.

  In order to manufacture such a cabinet 16, first, the heat radiating pipes 61 and 62, which are bent into a predetermined shape, are fixed to the heat insulating space side of the outer box 12 in which a steel plate is formed into a predetermined shape by pressing or the like. The heat radiating pipes 61 and 62 are fixed by fixing means 64 such as an aluminum foil tape or a good heat conductive hot melt adhesive so that the heat of the heat radiating pipes 61 and 62 is conducted well to the outer box 12.

  Specifically, the heat radiating pipe 62 disposed from one side wall 16a of the cabinet 16 to the other side wall 16b through the ceiling wall 16c is fixed to the side surface heat radiating pipe 62a and the ceiling heat radiating pipe 62b other than the bent portion 62c. 64, and the bending part 62c is not fixed with respect to the outer case 12, but can move freely.

  Next, the vacuum heat insulating materials 11 and 15 are fixed to the ceiling surface of the outer box 12 to which the heat radiating pipes 61 and 62 are fixed and the heat insulating space sides of the left and right side surfaces.

  Then, the outer box 12 in which the heat radiating pipes 61 and 62 and the vacuum heat insulating materials 11 and 15 are fixed to the foaming space side and the inner box 14 are assembled to form a heat insulating space between the outer box 12 and the inner box 14. Then, a stock solution of foam heat insulating material made of polyurethane home is poured into this heat insulating space. Thereby, the cabinet 16 in which the outer box 12 and the inner box 14 are integrated by the foam heat insulating material 13 in a state where the heat radiating pipes 61 and 62 and the vacuum heat insulating materials 11 and 15 are arranged on the heat insulating space side of the outer box 12. Is formed.

  When the foam insulation 13 is foam-filled into the heat insulation space in this way, in the refrigerator 10 of this embodiment, the vacuum insulation 11 provided on the ceiling wall 16c of the cabinet 16 sinks upward from the inside of the ceiling wall 16c. Since it is arranged avoiding the upper position of the formed recess 30 and the interval between the recess 30 and the vacuum heat insulating material 11 can be increased, the foam heat insulating material 13 is foam-filled into the heat insulating space of the cabinet 16. The liquid circumference is improved, and the lack of foam insulation 13 can be suppressed.

  Moreover, in the refrigerator 10 of this embodiment, the inclined surface 33 which inclines ahead is provided in the rear wall of the recessed part 30, and the space | interval of the front-end part of the vacuum heat insulating material 11 and the recessed part 30 is ensured widely. For this reason, when foaming and filling the foam heat insulating material 13, air hardly remains behind the recess 30, and the lack of the foam heat insulating material 13 can be suppressed.

  Moreover, in the refrigerator 10 of this embodiment, since the reinforcing rib 35 which protrudes toward the refrigerator compartment 22 side is provided in the inner bottom face of the recessed part 30, the liquid periphery at the time of foam-filling the foam heat insulating material 13 is deteriorated. The rigidity of the recess 30 can be increased without any problems.

  In addition, in the refrigerator 10 of the present embodiment, the vacuum heat insulating material is disposed above the concave portion 30 because the vacuum heat insulating material is not disposed above the concave portion 30 that houses the lighting device 31 that generates heat when energized. Compared to the case, the heat generated in the lighting device 31 is released to the outside of the warehouse, and it becomes difficult to stay inside the warehouse. Therefore, the temperature rise in the store | warehouse | chamber by the heat_generation | fever of the illuminating device 31 can be suppressed, and the power consumption of a refrigerator can be reduced.

  Moreover, in the refrigerator 10 of this embodiment, since the outer diameter dimension X of the bending part 62c provided in the ceiling wall 16c and the ceiling heat radiating pipe 62b is provided smaller than the thickness dimension Y of the vacuum heat insulating material 11, The heat-dissipating pipe 62 (bending portion 62c and ceiling heat-dissipating pipe 62b) provided on the ceiling wall 16c does not protrude downward from the vacuum heat insulating material 11, and hinders foam filling of the heat insulating foam 13 into the heat insulating space of the cabinet 16. It is hard to become, and the lack of the foam heat insulating material 13 can be suppressed.

  In addition, although this embodiment demonstrated the case of the illuminating device 31 which illuminates the inside of the refrigerator compartment 22 as a heat radiating member accommodated in the recessed part 30, this invention is not limited to this, For example, a high voltage is applied to water A heat generating member that generates heat when energized, such as an electrostatic atomizer that sprays mist of fine particles that are charged by application, may be housed in the recess 30.

  Moreover, the above-described embodiment is presented as an example, and is not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments are included in the scope and gist of the invention, and are also included in the invention described in the scope of claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Refrigerator 11 ... Vacuum heat insulating material 12 ... Outer box 12a ... Outer box bottom plate 13 ... Foam heat insulating material 14 ... Inner box 15 ... Vacuum heat insulating material 15a ... Groove 16 ... Cabinet 16c ... Ceiling wall 19 ... Machine room 20 ... Refrigerated space DESCRIPTION OF SYMBOLS 22 ... Refrigeration room 24 ... Vegetable room 30 ... Recessed part 31 ... Illumination device 32 ... Shade 33 ... Inclined surface 34 ... Inclined surface 35 ... Reinforcement rib 40 ... Freezing space 42 ... Ice making room 46 ... Freezing room 50 ... Refrigeration cycle 62 ... Radiation pipe 62a ... Side heat radiating pipe 62b ... Ceiling heat radiating pipe 62c ... Deflection part 64 ... Fixing means

Claims (5)

A cabinet in which a heat insulating material is foam-filled between the outer box and the inner box, a vacuum heat insulating material provided in the ceiling wall of the cabinet, and a concave portion recessed upward from the inside of the ceiling wall of the cabinet, The refrigerator characterized in that the vacuum heat insulating material is disposed so as to avoid the position above the recess so as to improve the liquid periphery when foam filling the heat insulating material .   The refrigerator according to claim 1, wherein a heat generating member is accommodated in the recess.   The refrigerator according to claim 1, further comprising an inclined surface that is inclined forward as the concave portion goes upward.   The refrigerator as described in any one of Claims 1-3 with which the rib which protrudes in the said recessed part toward the inside of a store | warehouse | chamber is provided.   A refrigerating cycle; and a heat dissipating pipe constituting a part of the high-temperature side refrigerant pipe of the refrigerating cycle and provided in the ceiling wall of the cabinet, and the outer diameter of the heat dissipating pipe is the thickness of the vacuum heat insulating material. The refrigerator according to any one of claims 1 to 4, wherein the refrigerator is smaller.

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