JP6303150B2 - Heat insulation box - Google Patents

Description

  Embodiments of the present invention relate to a heat insulating box.

  Conventionally, a heat insulating box used for a refrigerator for home use is a steel plate outer box having a left side plate, a right side plate, a top plate, a bottom plate and a back plate, and a left side plate, a right side plate, a top plate and a bottom plate of the outer box. And a foam insulating material made of urethane foam in the space formed between the left side plate, the right side plate, the top plate, the bottom plate and the inner plate made of synthetic resin having the back plate corresponding to the back plate. What is formed is common. Such a heat insulating box has a storage chamber whose front surface is open inside the inner box, and the storage chamber is surrounded by a heat insulating wall. In recent years, the use of vacuum insulation panels as part of the insulation for the insulation walls and the combined use of vacuum insulation pals and foam insulation as insulation has been proposed to reduce the amount of foam insulation used. Has been.

  In the heat insulation box having such a configuration, the flange formed on the front opening of the inner box is engaged with the flange formed on the front opening of the outer box, and the front opening is on the lower side. In such a state, the stock solution of the foam heat insulating material is injected between the outer box and the inner box from the back plate side of the outer box to perform foam filling. At the time of foaming, the stock solution of the foam insulation material injected between the outer box and the inner box is received by the flange portion of the front opening and then expanded by foaming, and the left and right side plate portions and the top plate between them. The part is raised, and finally it turns 90 degrees and flows to the back plate part. In this case, if the foaming pressure of the foam heat insulating material is not sufficient, an unfilled portion of the foam heat insulating material is generated on the back plate part. Despite attempts to reduce the amount of foam insulation used in combination with the panel, there was a problem that the amount of foam insulation used increased.

JP 2011-58657 A

  In view of this, a heat insulating box that can reduce the amount of the foam heat insulating material used in combination of the foam heat insulating material and the vacuum heat insulating panel is provided.

The heat insulation box of the present embodiment is a left side plate, a right side plate, a top plate, a bottom plate, and an outer box having a back plate,
An inner box disposed in the outer box and having a left side plate, a right side plate, a top plate, a bottom plate, and a back plate corresponding to the left side plate, the right side plate, the top plate, the bottom plate, and the back plate of the outer box, and the inner box And a vacuum heat insulation panel disposed between the outer box and a foam heat insulating material filled between the inner box and the outer box, and a back plate of the inner box and a back plate of the outer box, In the back heat insulating wall constituted by the vacuum heat insulating panel disposed between the front surface of the vacuum heat insulating panel corresponding to the inner box and the area where there is no foam heat insulating material on the back surface corresponding to the outer box, the vacuum In the side heat insulating wall composed of the heat insulating panel and the foam heat insulating material, the surface of the vacuum heat insulating panel is wider than the area without the foam heat insulating material on the front surface corresponding to the inner box and the back surface corresponding to the outer box. And

The expanded sectional view which follows the AA line of FIG. 2 which shows 1st Embodiment Vertical side view showing the schematic configuration of the entire refrigerator Configuration diagram of refrigeration cycle An exploded perspective view of the outer box Perspective view of inner box viewed from the back FIG. 1 equivalent diagram showing the second embodiment The figure which shows the state which applies the adhesive to the vacuum thermal insulation panel FIG. 5 equivalent diagram showing the third embodiment FIG. 1 equivalent view showing the fourth embodiment Figure equivalent to FIG. FIG. 2 equivalent view showing the fifth embodiment Figure equivalent to FIG. FIG. 5 equivalent view showing the sixth embodiment Arrangement configuration diagram of the pipe body showing the seventh embodiment

Hereinafter, a plurality of embodiments applied to a refrigerator will be described with reference to the drawings. In addition, in each embodiment, the same code | symbol is attached | subjected to the substantially same component, and description is abbreviate | omitted.
(First embodiment)
The first embodiment will be described below with reference to FIGS. 1 to 5.

  As shown in FIG. 1 and FIG. 2, the heat insulating box 1 has a heat insulating material between the outer box 2 made of steel plate and the inner box 3 made of synthetic resin (the space portion), as will be described in detail later. A plurality of storage chambers are provided inside. Specifically, as shown in FIG. 2, a refrigerating room 4 and a vegetable room 5 are provided in the heat insulating box 1 in order from the upper stage, and an ice making room 6 and a small freezer room (not shown) are provided therebelow. Are arranged side by side, and the freezer compartment 7 is provided below them. An automatic ice making device 8 is provided in the ice making chamber 6.

  The refrigerator compartment 4 and the vegetable compartment 5 are both storage compartments in a refrigeration temperature zone (for example, a positive temperature zone of 1 to 4 ° C.), and the space between them is divided up and down by a partition wall 9 made of synthetic resin. Yes. A hinged opening / closing type heat insulating door 4 a is provided at the front opening of the refrigerator compartment 4, and a drawer type heat insulating door 5 a is provided at the front opening of the vegetable room 5. The lower case 10 which comprises a storage container is connected with the back surface part of this heat insulation door 5a. An upper case 11 smaller than the lower case 10 is provided on the upper portion of the lower case 10. A chilled chamber 12 is provided in the lowermost part of the refrigerator compartment 4 (upper part of the partition wall 9). A chilled case 13 is provided in the chilled chamber 12 so that it can be taken in and out.

  The ice making room 6, the small freezing room, and the freezing room 7 are all storage rooms in a freezing temperature zone (for example, a minus temperature zone of −10 to −20 ° C.), and the vegetable room 5 and the ice making room 6 are small. The freezer compartment is partitioned vertically by a heat insulating partition wall 14. A drawer-type heat insulating door 6a is provided at the front opening of the ice making chamber 6, and an ice storage container 15 is connected to the back surface of the heat insulating door 6a. Although not shown, a drawer-type heat insulating door connected to a storage container is also provided at the front opening of the small freezer compartment. A drawer-type heat insulating door 7 a to which a lower storage container 7 b and an upper storage container 7 c are connected is also provided at the front opening of the freezer compartment 7.

  A refrigeration cycle 16 (see FIG. 3) for cooling each storage chamber is incorporated in the heat insulating box 1. Although details will be described later, the refrigeration cycle 16 includes a refrigeration cooler 17 for cooling a refrigeration temperature zone storage room (the refrigeration room 4 and the vegetable room 5), and a refrigeration temperature zone storage room (the ice making room 6, small size). The freezing room is configured to include a freezing cooler 18 for cooling the freezing room 7). As shown in FIG. 2, a machine room 19 is provided on the back side of the lower end of the heat insulation box 1. In the machine room 19, there are a compressor 20 and a condenser 21 (see FIG. 3) constituting the refrigeration cycle 16, a cooling fan (not shown) for cooling them, a defrost water evaporating dish 35 described later, and the like. It is arranged.

  In the back of the storage room (the refrigeration room 4 and the vegetable room 5) in the refrigeration temperature zone of the heat insulation box 1, the refrigeration cooler 17 and the cold air generated by the refrigeration cooler 17 are stored in the refrigeration room 4 (and the vegetables). A cold air supply duct 30 for supplying the inside of the chamber 5), a refrigeration side blower fan 31 for circulating the cold air, and the like are arranged as follows. In other words, the back heat insulating wall of the heat insulating box 1 is provided with a refrigeration-side cooler chamber 32 that also serves as an air duct and is positioned behind the lowermost chilled chamber 12 of the refrigeration chamber 4. In the lower part on the front side of the refrigeration side cooler chamber 32, a suction port 37 is provided in the vegetable chamber 5 from above. The refrigeration cooler 17 is disposed in the refrigeration side cooler chamber 32.

  A refrigeration-side water receiving portion 33 that receives the defrosted water from the refrigeration cooler 17 is provided in the lower part on the rear side of the refrigeration-side cooler chamber 32. The refrigeration water receiver 33 communicates with a defrosted water evaporating dish 35 provided in the machine room 19 via a refrigeration drain hose 34, which is a drainage pipe arranged as will be described later. Thereby, the defrost water received by the refrigeration side water receiving part 33 is led to the defrost water evaporating dish 35 through the refrigeration side drain hose 34 and is evaporated in the defrost water evaporating dish 35. ing.

  A refrigeration side blower fan 31 is disposed behind the chilled chamber 12 and a blower duct 36 is provided. The air duct 36 has a lower end communicating with the rear upper part of the refrigeration side cooler chamber 32 and an upper end of the cold air supply duct 30 provided so as to extend upward with a certain width across the back heat insulating wall of the refrigeration chamber 4. It communicates with the department. The cold air supply duct 30 is provided with a plurality of cold air supply ports 30 a that open in the refrigerator compartment 4. Although not particularly shown in the figure, communication ports are formed at the left and right corners of the rear part of the partition wall 9 constituting the bottom plate of the refrigerator compartment 4. One of the communication ports allows the refrigerator compartment 4 to communicate with the vegetable compartment 5 below it, and the other communicates the refrigerator compartment 4 with the front side of the refrigerator-side cooler chamber 32.

  In this configuration, when the refrigeration side blower fan 31 is driven, as shown by the arrow in FIG. 2, the air in the vegetable compartment 5 is sucked into the refrigeration side cooler chamber 32 from the suction port 37 and sucked. Air is blown out to the air duct 36 side. The air blown to the air duct 36 side passes through the cold air supply duct 30 and is blown out into the refrigerator compartment 4 from the plurality of cold air supply ports 30a. Part of the air blown into the refrigerator compartment 4 is also supplied into the vegetable compartment 5 through the communication port, and finally sucked into the air duct 36 by the refrigerator air blower fan 31 through the refrigerator air cooler room 32. Circulation is performed. In this process, the air passing through the refrigerating side cooler chamber 32 is cooled by the refrigerating cooler 17 to become cold air, and the cold air is supplied to the refrigerating chamber 4 and the vegetable chamber 5, whereby the refrigerating chamber 4 and the vegetable compartment. 5 is cooled to a temperature in the refrigeration temperature zone.

  A refrigeration-side cooler chamber 38 that also serves as a blower duct is provided at the back of the storage compartment (the ice making compartment 6, the small freezer compartment, and the freezer compartment 7) in the freezing temperature zone of the heat insulating box 1. In the lower part of the freezing cooler chamber 38, a freezing cooler 18, a defrosting heater (not shown), and the like are disposed. Further, a refrigeration-side blower fan 39 is disposed at the upper part of the refrigeration-side cooler chamber 38. A cold air outlet 38a is provided in the middle part of the front surface of the freezing side cooler chamber 38, and a return port 38b is provided in the lower end part.

  A refrigeration-side water receiver 40 that is positioned below the refrigeration cooler 18 and receives defrost water when the refrigeration cooler 18 is defrosted is provided. The refrigeration water receiver 40 is communicated with a defrosted water evaporating dish 35 provided in the machine room 19 via a refrigeration drain hose 41 passing through the bottom heat insulating wall of the heat insulating box 1. Thereby, the defrost water received by the freezing side water receiving part 40 is also led to the defrosting water evaporating dish 35 through the freezing side drain hose 41, and evaporates in the defrosting water evaporating dish 35. ing.

  In this configuration, after the refrigeration side blower fan 39 is driven, the cold air generated by the refrigeration cooler 18 is supplied from the cold air outlet 38 a into the ice making chamber 6, the small freezer compartment, and the freezer compartment 7. Circulation is performed such that the return port 38b returns to the freezer side cooler chamber 38. Thereby, the ice making room 6, the small freezer room, and the freezer room 7 are cooled.

  Next, the configuration of the refrigeration cycle 16 will be described in detail. As shown in FIG. 3, the refrigeration cycle 16 includes a compressor 20, a condenser 21, a dryer 22, a three-way valve 23, capillary tubes 24 and 25, and coolers 17 and 18 in the order of refrigerant flow. It is configured to be connected in a ring. A condenser 21 and a dryer 22 are sequentially connected to a high-pressure discharge port of the compressor 20 via a connection pipe 26. A three-way valve 23 is connected to the discharge side of the dryer 22. The three-way valve 23 has one inlet to which the dryer 22 is connected and two outlets. One of the two outlets of the three-way valve 23 is connected to the refrigeration-side capillary tube 24 and the refrigeration cooler 17 in order, which are connection pipes. The refrigeration cooler 17 is connected to the compressor 20 via a refrigeration side suction pipe 27 that is a pipe for connection.

Of the two outlets of the three-way valve 23, the other outlet is connected in order with a refrigeration-side capillary tube 25 and a refrigeration cooler 18 which are connecting pipes. The refrigeration cooler 18 is connected to the compressor 20 via a refrigeration-side suction pipe 28 that is a connection pipe. A check valve 29 is provided between the refrigeration cooler 18 and the compressor 20 to prevent the refrigerant from the refrigeration cooler 17 from flowing back to the refrigeration cooler 18 side.
Next, a specific configuration of the heat insulating box 1 will be described with reference to FIGS. 1 and 3 to 5 as well.

  The outer box 2 made of a steel plate has a left side plate 50, a right side plate 51, a top plate 52, a bottom plate 53, and a back plate 54, and has a front surface opened. The left side plate 50, the right side plate 51, and the top plate 52 are formed by bending a single long steel plate into a substantially U shape. A stepped portion 53 a for forming the machine chamber 19 is bent in the bottom plate 53. Further, in the left side plate 50 and the right side plate 51, flange portions 50a and 51a (see FIG. 1) projecting inward are formed at the front end portion, and flange portions 50b and 51b directed forward are formed at the rear end portion. (See FIG. 1) is formed. Further, flange portions 54a and 54b (see FIG. 1) that are inserted and engaged with the flange portions 50b and 51b of the left side plate 50 and the right side plate 51 are formed at both left and right ends of the back plate 54, respectively. An injection hole 55 (see FIG. 4) is formed in the center of the left and right sides of the back plate 54, respectively.

  The inner box 3 made of synthetic resin is integrally formed by a vacuum molding machine, and the left side plate 56, the right side plate 51, the top plate 52, the bottom plate 53 and the back plate 54 of the outer box 2, the left side plate 56, the right side It has a plate 57, a top plate 58, a bottom plate 59, and a back plate 60, and the front surface opens. The bottom plate 59 is formed with a stepped portion 59a for forming the machine room 19 corresponding to the stepped portion 53a of the bottom plate 53 of the outer box 2. At the front end portions of the left side plate 56 and the right side plate 57, flange portions 56a and 57a that are inserted and engaged with the flange portions 50a and 51a of the left side plate 50 and the right side plate 51 of the outer box 2 are formed. Further, the corner portion formed by the back plate 60 and the left side plate 56, the right side plate 57, and the top plate 58, which are the other plates connected to the back plate 60, is accommodated so as to protrude inward of the inner box 3 from the corner portion. Chamfered portions 61, 62, and 63 (see FIGS. 1, 2, and 4) are formed as concave portions. The inner box 3 has a base end portion located on the chamfer 61 or 62 and connected between the left side plates 50 and 56 or between the right side plates 51 and 57 on the left and right sides of the back plate 60 of the inner box 3. A plurality of recesses 64 projecting inward of 3 are formed. A gas vent 64a (see FIG. 1) is formed at the tip of each recess 64.

  Then, the refrigeration side capillary tube 24 and the refrigeration side suction pipe 27 of the refrigeration cycle 16 are led from the back plate 60 side in the inner box 3 to the chamfered portion 62 side, as shown in FIG. The pipe body 65 is formed by being led to each other and integrated with each other, for example, by brazing so that heat exchange is possible (see FIGS. 1 and 2). Further, the pie body 65 rises along the outer surface of the chamfered portion 62 of the inner box 3, further directs toward the left side plate 56 along the outer surface of the chamfered portion 63, and makes a U-turn on the left side plate 56 side. After being oriented in the direction of the right side plate 57, it is arranged so as to descend along the outer surface of the chamfered portion 62.

  Here, the integration of the refrigeration side capillary tube 24 and the refrigeration side suction pipe 27 of the refrigeration cycle 16 so as to allow heat exchange is facilitated by the vaporization of the refrigerant in the refrigeration side suction pipe 27 by the heat of the refrigeration side capillary tube 24. This is to improve the operation efficiency of the refrigeration cycle 16 and to reduce power consumption. In this embodiment, the refrigeration-side capillary tube 25 and the refrigeration-side suction pipe 28 are similarly arranged, but the illustration is omitted here. Further, as shown in FIG. 5, the refrigeration-side drain hose 34 of the refrigeration-side water receiving portion 33 is extended from the back plate 60 side in the inner box 3 to the chamfered portion 62 side and outward of the chamfered portion 62. Furthermore, it is arranged so as to descend along the outer surface of the chamfer 62.

  As shown in FIGS. 1, 2 and 4, the inner surfaces of the left side plate 50 and the right side plate 51 of the outer box 2 are each vacuum insulated as a heat insulating material by a double-sided adhesive tape or an adhesive such as hot melt. The back surfaces of the panels 66 and 67 are bonded, and the surfaces of the vacuum heat insulating panels 68 and 69 as heat insulating materials are respectively attached to the outer surfaces of the top plate 58 and the bottom plate 59 of the inner box 3 by an adhesive such as double-sided adhesive tape or hot melt. The back surface of the vacuum heat insulating panel 70 as a heat insulating material is bonded to the inner surface of the back plate 54 of the outer box 2 with an adhesive such as a double-sided adhesive tape or hot melt. Then, as shown in FIG. 1, the inner box 3 is arranged in the outer box 2, and the left side plate 56 and the right side plate 57 of the inner box 3 are connected to the flange portions 56 a and 57 a of the left side plate 50 and the right side plate of the outer box 2. 51, the bottom plate 53 is attached to the left side plate 50 and the right side plate 51 of the outer case 2, and the back plate 54 is attached to the left side plate 50, the right side plate 51, and the top plate of the outer case 2. Attached to 62 and the bottom plate 53, the surface of the vacuum heat insulation panel 70 is brought into pressure contact with the outer surface of the back plate 60 of the inner box 3.

  Thereafter, as shown in FIG. 4, the front openings of the outer box 2 and the inner box 3 are located on the lower side, and a foaming jig is fitted in the inner box 3, and the back of the outer box 2 is placed. A stock solution of foam heat insulating material made of urethane foam is injected from the injection hole 55 of the plate 54. The stock solution of the foam heat insulating material injected between the outer box 2 and the inner box 3 through the injection hole 55 was received by the flange portions 50a, 51a and 56a, 57a of the front opening portions of the outer box 2 and the inner box 3. Then, it expand | swells by foaming, it is filled up between the left side plates 50 and 56 of the outer box 2 and the inner box 3, between the right side plates 51 and 57, and between the top plates 52 and 58, and the foam heat insulating material 71 as a heat insulating material is filled. Is configured.

  In the heat insulating box 1 using the vacuum heat insulating panels 66 to 70 and the foam heat insulating material 71 as the heat insulating materials, as shown in FIG. 1, the left side plates 50 and 56, the vacuum heat insulating panel 66 and the foam heat insulating material 71a are provided on the left side. The right side plates 51 and 57, the vacuum heat insulation panel 67 and the foam heat insulating material 71b constitute the right side heat insulation wall, and as shown in FIG. 2, the top plates 52 and 58, the vacuum heat insulation panel 68 and The foam heat insulating material 71c constitutes the top heat insulating wall, and the bottom plates 53 and 59, the vacuum heat insulating panel 69 and the foam heat insulating material 71d constitute the bottom heat insulating wall, and as shown in FIGS. , 60 and the vacuum heat insulation panel 70 constitute a back heat insulation wall. In this case, in the heat insulation box 1, the vacuum heat insulation panels 66 to 70 are set to have substantially the same thickness dimension, and the foam heat insulating materials 71 a to 71 d are set to have substantially the same thickness dimension. The thickness dimension of the heat insulating materials 71a to 71d is set to be equal to or smaller than the thickness dimension of the vacuum heat insulating panels 66 to 70, for example, approximately equal.

  Moreover, in the heat insulation box 1, as shown in FIG. 1, the corner part which the left side board 50 and the back board 54 of the outer case 2 make, the rear surface part of the vacuum heat insulation panel 66, and the left side part of the plate vacuum heat insulation panel 70 The space formed by the chamfered portion 61 of the inner box 3 is filled with a foam heat insulating material 71e having a thickness larger than the foam heat insulating materials 71a to 71d, and a corner portion formed by the right side plate 51 and the back plate 54. Further, the space formed by the rear surface portion of the vacuum heat insulation panel 67, the right side surface portion of the plate vacuum heat insulation panel 70, and the chamfered portion 62 of the inner box 3 has a larger thickness dimension than the foam heat insulating materials 71a to 71d. The foam heat insulating material 71f is filled. As shown in FIG. 2, a corner portion formed by the top plate 52 and the back plate 54 of the outer box 2, a rear surface portion of the vacuum heat insulating panel 68, an upper surface portion of the vacuum heat insulating panel 70, and a chamfered portion 63 of the inner box 3 The space formed by is filled with a foam heat insulating material 71g having a thickness larger than that of the foam heat insulating materials 71a to 71d, a corner portion formed by the bottom plate 53 and the back plate 54, a lower surface portion of the vacuum heat insulating panel 70, The space formed by the stepped portions 53a and 59a is filled with a foam heat insulating material 71h having a larger thickness than the foam heat insulating materials 71a to 71d. The space between the left side plates 50 and 56 or the right side plate 51 is between the vacuum heat insulating panel 70 whose back surface is bonded to the inner surface of the back plate 54 of the outer box 2 and the back plate 60 of the inner box 3 pressed against the vacuum heat insulating panel 70. The foam heat insulating material 71i is filled by the foam heat insulating material rising between 57 and 57 flowing into the plurality of recesses 64 (see FIG. 1), so that the surface of the vacuum heat insulating panel 70 is covered with the inner box 3 by the foam heat insulating material 71i. The back plate 60 is adhered to the outer surface (back surface).

  In the above case, in the heat insulation box 1, from the left side heat insulating wall composed of the left side plates 50 and 56, the vacuum heat insulating panel 66 and the foam heat insulating material 71a, and the right side plates 51 and 57, the vacuum heat insulating panel 67 and the foam heat insulating material 71b. A right side heat insulating wall, a top heat insulating wall made of the top plates 52 and 58, the vacuum heat insulating panel 68 and the foam heat insulating material 71c, and a bottom heat insulating wall made of the bottom plates 53 and 59, the vacuum heat insulating panel 69 and the foam heat insulating material 71d. Constitutes a side heat insulating wall which is another heat insulating wall other than the back heat insulating wall composed of the back plates 54 and 60 and the vacuum heat insulating panel 70. In the left side heat insulating wall and the right side heat insulating wall, foam heat insulating materials 71a and 71b exist between the inner box 3 and the surfaces of the vacuum heat insulating panels 66 and 67 corresponding thereto, and the top heat insulating wall and the bottom heat insulating wall. On the wall, foam insulation materials 71c and 71d exist between the outer box 2 and the back surfaces of the corresponding vacuum heat insulation panels 68 and 69. On the back heat insulation wall, the inner case 3 and the corresponding vacuum heat insulation panel. The surface of 70 is in contact with each other, and only a foamed heat insulating material 71i for bonding exists between them. Therefore, in the back heat insulating wall, the area where there is no foam heat insulating material on the front surface corresponding to the inner box 3 and the back surface corresponding to the outer box 2 of the vacuum heat insulating panel 70 is the left side heat insulating wall and the right side heat insulating wall which are the other side heat insulating walls. It is set to be wider than that of the wall, top heat insulation wall and bottom heat insulation wall. In other words, the amount of foam heat insulating material used in the back heat insulating wall is larger than the amount of foam heat insulating material used in the left side heat insulating wall, right side heat insulating wall, top heat insulating wall, and bottom heat insulating wall as other side heat insulating walls. Remarkably few.

  Further, in the above case, in the heat insulating box 1, the chamfered portions 62 and 63 are formed at the corner portion formed by the right side plate 57 and the back plate 60 of the inner box 3 and the corner portion formed by the top plate 58 and the back plate 60. Thus, a space is created outside the chamfered portions 62 and 63 by the amount of the chamfered portions 62 and 63 projecting inward of the inner box 4, and this becomes a storage recess, and the foam heat insulating materials 71 f and 71 g are also here. As shown in FIGS. 1 and 2, in this embodiment, the pipe body 65 is embedded in the increased portions of the foam insulation materials 71f and 71g, as shown in FIGS. As shown in FIG. 5, the refrigeration drain hose 34 is embedded in the foam heat insulating material 71f.

  Thus, according to the first embodiment, the vacuum heat insulation panel 70 is disposed between the back plate 54 of the outer box 2 and the back plate 60 of the inner box 3, and between the outer box 2 and the inner box 3. When the foam insulation material solution was injected and filled with foam, the foam insulation was hardly filled and filled between the vacuum insulation panel 70 and the back plate 60 of the inner box 3. It is not necessary to inject a stock solution having a foaming ratio higher than the foaming ratio necessary to obtain a foaming pressure that flows between the plate 54 and the back plate 60, and the amount of foam heat insulating material used can be reduced.

  In addition, a plurality of concave portions 64 projecting inward are formed in the back plate 60 of the inner box 3, and the foam heat insulating material is caused to flow into these concave portions 64 to be filled with the foam heat insulating material 71i. The heat insulating material 71i can be used as an adhesive to bond the vacuum heat insulating panel 70 to the back plate 60 of the inner box 3, so that the heat insulating panel 70 is attached to the back plate 60 of the inner box 3 before foam filling of the foam heat insulating material. There is no need to adhere to the tape, and the assembly work is simplified. In this case, since the vent hole 64a is formed at the tip of the concave portion 64, the foamed heat insulating material 71i can be sufficiently filled and filled even if the width of the concave portion 64 (the groove width through which the foamed heat insulating material flows) is narrow. Can do.

  Further, chamfered portions 62 and 63 are formed at a corner portion formed by the right side plate 57 and the back plate 60 of the inner box 3 and a corner portion formed by the top plate 58 and the back plate 60, and the outside of the chamfered portions 62 and 63. A storage recess is formed in this, and the foam insulation materials 71f and 71g are filled therewith to increase the thickness thereof. A pipe body 65 serving as a connection pipe is formed in the increased foam insulation materials 71f and 71g. Since the refrigeration side drainage hose 34, which is a drainage pipe, is buried in the foam insulation 71f, the outer side of the backplate 60, which is the portion close to the vacuum thermal insulation panel 70 of the backplate 60, that is, outside It is not necessary to arrange the pipe body 65 and the refrigeration drain hose 34 between the back plate 54 of the box 2 and the back plate 60 of the inner box 3, and the back plate 54 of the outer box 2 and the back plate 60 of the inner box 3. The thickness dimension between The air insulation panel 70 can be easily arranged.

(Second Embodiment)
6 and 7 show a second embodiment. Hereinafter, parts different from the first embodiment will be described.
In the second embodiment, the plurality of recesses 64 are not formed in the back plate 60 of the inner box 3 (see FIG. 6). That is, in the second embodiment, the vacuum heat insulation panel 70 is bonded to the back plate 60 of the inner box 3 before foam filling with the foam heat insulating material.

  Specifically, the vacuum heat insulation panel 70 is bonded to the inner surface of the back plate 54 of the outer box 2 with an adhesive such as double-sided adhesive tape or hot melt, and the back plate 54 is placed with the surface side of the vacuum heat insulation panel 70 facing upward. As shown in FIG. 7, hot melt is applied as an adhesive to the surface of the vacuum heat insulation panel 70 (the upper surface in FIG. 7) by the roll coater 72.

  The roll coater 72 is in contact with the surface of the vacuum heat insulation panel 70 to apply a hot melt, a backup roll 74 in contact with the outer surface of the back plate 54 (the lower surface in FIG. 7), and the hot melt to the coating roll 73. The pickup roll 75 to be supplied is configured to be rotatably supported by a support (not shown), and the back plate 54 is moved rightward in FIG. Is applied. In this case, the height dimension (protrusion dimension) Lb of the flange portions 54a and 54b of the back plate 54 is the height dimension of the vacuum heat insulation panel 70 (thickness dimension of the vacuum heat insulation panel 70 + plate thickness dimension of the back plate 54) La. It is set to be smaller (Lb <La), and the flange portions 54a and 54b are prevented from coming into contact with the coating roll 73 and being damaged when the back plate 54 is moved.

  Thus, in the second embodiment, as described above, the back plate 54 having the vacuum heat insulating panel 70 with the hot melt applied to the surface thereof has the flange portions 54a and 54b as the flanges of the left side plate 50 and the right side plate 51. When it is attached to the outer box 2 after being inserted into and engaged with the parts 50b and 51b, the surface side of the vacuum heat insulating panel 70 is pressed against the back surface (outer surface) of the back plate 60 of the inner box 3 and bonded by hot melt.

  Thereafter, a foamed heat insulating material stock solution is injected between the outer box 2 and the inner box 3 to cause foaming. Until then, the inner box 3 is flanged to the outer box 2 at the front opening. Since the portions 56a and 57a are in an unstable state where they are simply inserted and engaged with the flange portions 50a and 51a, the inner box 3 having a low mechanical strength may be deformed. However, in the second embodiment, the back plate 54 of the outer box 2 and the back plate 60 of the inner box 3 are integrated by the vacuum heat insulating panel 70 bonded to both, so that the strength of the inner box 3 is increased. Therefore, the inner box 3 will not be deformed even if there is a time until the foam insulation is foam-filled.

  Incidentally, as described above, when the back plate 54 is attached to the outer box 2 and the vacuum heat insulating panel 70 is bonded to the back plate 60 of the inner box 3, the inner box 3 is attached to the outer box 2 as described above. Since the flange portions 56a and 57a of the front opening are in an unstable state where they are simply inserted and engaged with the flange portions 50a and 51a, the vacuum heat insulation panel 70 is in the normal position of the back plate 60 of the inner box 3. It is uncertain whether or not it will be bonded. If the inner box 3 is deviated from the normal position and the vacuum heat insulation panel 70 is adhered to a position deviated from the normal position of the back plate 60 of the inner box 3, foaming is performed between the outer box 2 and the inner box 3. When a foaming jig is fitted into the inner box 3 so as to inject the stock solution of the heat insulating material and foam and fill it, the inner box 3 is forcibly moved to the normal position by this, so that the outer box is removed via the foam heat insulating panel 70. Stress is applied to the box 2 and the inner box 3, and as a result, wrinkles and distortion may occur in the inner box 3 having low mechanical strength.

  On the other hand, in the second embodiment, the chamfered portions 61, 62, and 63 are provided at the corners formed by the back plate 60 of the inner box 3 and the left side plate 56, the right side plate 57, and the top plate 58 connected to the back plate 60. Since it is formed, the stress caused by the displacement of the bonding position of the vacuum heat insulating panel 70 as described above is absorbed by the chamfered portions 61, 62, 63, and the inner box 3 is prevented from being wrinkled and distorted. Can do. The chamfered portions 61, 62 and 63 of the inner box 3 are preferably linear, but may be slightly arcuate.

(Third embodiment)
FIG. 8 shows a third embodiment, and only the parts different from the first embodiment will be described below. In the following description, FIG. 2 is also referred to for convenience of description.
In the third embodiment, as in the second embodiment, the plurality of recesses 64 are not formed in the back plate 60 of the inner box 3. Instead, the back plate 60 of the inner box 3 is formed with a storage recess 76 that protrudes inward of the inner box 3 and is located on the back side of the refrigeration side cooler chamber 32 that functions as a blower duct. The storage recess 76 is formed so as to extend horizontally from the center position above and below the back plate 60 to the position of the chamfer 62. Further, the back plate 60 of the inner box 3 is formed with a storage recess 77 that protrudes inward of the inner box 3 and is located on the back side of the lower part near the refrigeration side cooler chamber 32. The storage recess 77 is also formed so as to extend horizontally from the center position above and below the back plate 60 to the position of the chamfer 62.

  The pipe body 65 is led out from the central position of the back plate 60 of the inner box 3 into the storage recess 76, guided along the storage recess 76 to the outer surface of the chamfer 62, and thereafter the chamfer 62. Is guided upward along the outer surface of the chamfered portion 63, guided in the direction of the left side plate 56 along the outer surface of the chamfered portion 63, and further guided downward along the outer surface of the chamfered portion 61. The In addition, the refrigeration drain hose 34 is led out from the central position of the back plate 60 of the inner box 3 into the storage recess 77 and guided along the storage recess 77 to the outer surface of the chamfer 62. Guided downward along the outer surface of the portion 62.

  Then, after that, the vacuum heat insulation panel 70 is adhered to the back plate 60 of the inner box 3 in the same manner as in the second embodiment. However, the pipe body 65 and the refrigeration side drain hose 34 are connected to the storage recess 76 and 77, the vacuum heat insulation panel 70 does not ride on the pipe body 65 and the refrigeration side drain hose 34 and float up. Thereafter, a foamed heat insulating material stock solution is injected between the outer box 2 and the inner box 3 to be filled with foam. At the time of foam filling, the foamed heat insulating material is introduced from the chamfered portion 62 into the housing recesses 76 and 77. The pipe body 65 and the refrigeration side drain hose 34 are embedded in the foam heat insulating material.

  According to the third embodiment, there is a structural or technical situation in which the pipe body 65 and the refrigeration side drain hose 34 must be led out of the inner box 3 from the center of the back plate 60 of the inner box 3. Even in this case, the housing recesses 76 and 77 projecting inwardly are formed in the back plate 60 of the inner box 3, and the pipe body 65 and the refrigeration side drain hose 34 are led out and stored in these housing recesses 76 and 77. Therefore, when the vacuum heat insulation panel 70 is bonded to the bottom plate of the inner box 3, it is possible to prevent deformation such as the vacuum heat insulation panel 70 riding on the pipe body 65 and the refrigeration drain hose 34 and floating. The insulating performance of the heat insulating panel 70 is not adversely affected.

(Fourth embodiment)
FIG. 9 and FIG. 10 show a fourth embodiment, and only parts different from the first embodiment will be described below. In the following description, FIG. 2 is also referred to for convenience of description. In the fourth embodiment, as in the second embodiment, the plurality of recesses 64 are not formed in the back plate 60 of the inner box 3.

  As shown in FIG. 2, a refrigeration-side cooler chamber 38 that also serves as a blower duct in which a refrigeration cooler 18 and a refrigeration-side blower fan 39 are disposed is provided at the back of the freezer compartment 7. As shown in FIG. 9, both left and right end portions of the freezing side cooler chamber 38 are waste spaces (dead spaces) in which food cannot be stored. In the fourth embodiment, the inner side of the inner box 3 is placed on the back plate 60 of the inner box 3 in order to use the right dead space on one side of the left and right ends of the freezing side cooler chamber 38. A storage recess 78 is formed so as to protrude from the top.

  The refrigeration-side capillary tube 25 and the refrigeration-side suction pipe 28 connected to the refrigeration cooler 18 are led out from the inner box 3 into the housing recess 78 and are integrated with each other, for example, by brazing so as to allow heat exchange. Thus, a pipe body 79 as a connecting pipe is formed. Further, as shown in FIG. 10, the pipe body 79 is disposed so as to be directed downward after being bent twice in a U-shape in the storage recess 78.

  After that, as in the second embodiment, the vacuum heat insulation panel 70 is bonded to the back plate 60 of the inner box 3, and thereafter, a raw solution of foam heat insulating material is injected between the outer box 2 and the inner box 3. When foamed, as shown in FIG. 9, the foamed heat insulating material 71f is also filled in the housing recess 78, and the pipe body 79 is embedded in the foamed heat insulating material 71f.

  According to the fourth embodiment, the storage recess 78 is formed so as to protrude into one of the dead spaces generated on the left and right end portions of the freezing side cooler chamber 38 in the freezing chamber 7. Since the pipe body 79 is housed and disposed in the housing recess 78, the pipe body 79 can be disposed by skillfully utilizing the dead space in the freezer compartment 7.

(Fifth embodiment)
FIG. 11 and FIG. 12 show a fifth embodiment. Hereinafter, parts different from the first embodiment will be described. In the fifth embodiment, as in the second embodiment, the plurality of recesses 64 are not formed in the back plate 60 of the inner box 3.

  In the fifth embodiment, unlike the first embodiment, the step portions 53a and 59a are not formed on the bottom plate 53 of the outer box 2 and the bottom plate 59 of the inner box 3, and instead of the outer box 2 A step 52a for forming the machine room 19 is formed in the top plate 52, and a storage recess that protrudes inward of the inner box 3 corresponding to the step 52a of the top plate 52 is formed on the top plate 58 of the inner box 3. Step portion 58a is formed. And the pipe body 65 arrange | positioned so that it may raise along the outer surface of the chamfer 62 of the inner box 3 is arrange | positioned so that it may be guided to the left side plate 56 direction by the horizontal part of the outer surface of the level | step-difference part 58a, The U-turn is guided in the direction of the right side plate 57, the U-turn is again guided in the direction of the left side plate 56, and the left side plate 56 is arranged so as to be directed upward in the vicinity. That is, the pipe body 65 is disposed in a U-shape with two turns on the horizontal portion of the stepped portion 58a.

  After that, as in the second embodiment, the vacuum heat insulation panel 70 is bonded to the back plate 60 of the inner box 3, and thereafter, a raw solution of foam heat insulating material is injected between the outer box 2 and the inner box 3. When foamed, as shown in FIG. 11, the foam heat insulating material 71g is also filled between the stepped portion 52a of the top plate 52 and the stepped portion 58a of the top plate 58, and the pipe body 65 is filled with the foamed heat insulating material 71g. Buried in

  In the machine room 19, a compressor 20, a condenser 21 (see FIG. 3), a cooling fan (not shown) for cooling them, and the like are disposed. Further, since the top plate 58 of the inner box 3 has the stepped portion 58a, the cold air supply duct 30 includes an extended duct portion 30b along the stepped portion 58a, and the cold air supply port 30a is provided at the upper end portion thereof. Yes.

  According to the fifth embodiment, in the case of a refrigerator of the type in which the compressor 20 is arranged on the upper portion of the heat insulating box 1, the outer box 2 is formed so as to form the machine room 19 for arranging the compressor 20 and the like. Since the step portions 52a and 58a are formed on the top plate 52 of the inner box 3 and the top plate 58 of the inner box 3, the pipe body 65 is disposed and stored by utilizing the space portion inevitably formed between the step portions 52a and 58a. To do.

(Sixth embodiment)
FIG. 13 shows a sixth embodiment. Hereinafter, parts different from the fifth embodiment will be described.
In the fifth embodiment, the pipe body 65 is arranged in a U-shape having two turns on the horizontal portion of the stepped portion 58a of the top plate 58 of the inner box 3. However, in the sixth embodiment, The pipe body 65 is arranged in a U-shape of one turn on the horizontal portion of the step portion 58a, and further moved to the vertical portion of the step portion 58a and arranged in a U-shape of two turns, and then directed upward. Are arranged to be.

  According to the sixth embodiment, the length of the pipe body 65 formed by integrating the refrigeration-side capillary tube 24 and the refrigeration-side suction pipe 27 (see FIG. 3) so as to allow heat exchange is larger than that of the fifth embodiment. Therefore, heat exchange between the refrigeration side capillary tube 24 and the refrigeration side suction pipe 27 can be sufficiently performed, and further power saving can be achieved.

(Seventh embodiment)
FIG. 14 shows a seventh embodiment. Hereinafter, parts different from the fifth embodiment will be described.
In the fifth embodiment, the pipe body 65 is arranged in a U-shape with two turns on the horizontal portion of the stepped portion 58a in the top plate 58 (both see FIG. 12) of the inner box 3. In the seventh embodiment, the pipe body 65 is arranged in a spiral shape in the horizontal portion of the stepped portion 58a, and is then drawn out from the central portion and directed upward. Note that a plurality of spiral portions of the pipe body 65 may be provided so as to be juxtaposed in the horizontal portion of the stepped portion 58a, or may be provided in a vertical portion of the stepped portion 58a.

(Other embodiments)
In the first to third embodiments, a pipe body, which is a pipe in which the refrigeration-side capillary tube 25 and the refrigeration-side suction pipe 28 are integrated so as to be capable of exchanging heat, is used as a stepped portion 59a as a storage recess of the bottom plate 59 of the inner box 3. It is good also as a structure accommodated and arrange | positioned on (the outer surface side).
The first to third embodiments may be combined with the fourth embodiment.
The first to seventh embodiments are applied to a refrigerator. However, the first to seventh embodiments can be applied to all types using a heat insulating box such as a showcase.

  As described above, according to the heat insulating box of the present embodiment, the left side plate, the right side plate, the top plate, the bottom plate, and the outer box having the back plate, the left side plate of the outer box, Arranged between the left side plate corresponding to the right side plate, top plate, bottom plate and back plate, right side plate, top plate, bottom plate and back plate, and between the back plate of the inner box and the back plate of the outer box And a vacuum heat insulation panel constituting a back heat insulation wall, and a foam heat insulation material filled between the inner box and the outer box to constitute a side heat insulation wall. And in the back heat insulating wall, the area where there is no foam heat insulating material on the front surface corresponding to the inner box and the back surface corresponding to the outer box of the vacuum heat insulating panel is set to be wider than that of the side heat insulating wall. ing. Thereby, in the heat insulation box of the combined use of a foam heat insulating material and a vacuum heat insulating panel, the usage-amount of a foam heat insulating material can be saved.

  Although some embodiments have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 1 is a heat insulating box, 2 is an outer box, 3 is an inner box, 4 is a refrigerated room (a refrigerated temperature zone storage room), 5 is a vegetable room (a refrigerated temperature zone storage room), and 6 is an ice making room ( (Freezing temperature zone storage room), 7 is a freezing room (freezing temperature zone storage room), 16 is a refrigeration cycle, 17 is a refrigeration cooler, 18 is a refrigeration cooler, 19 is a machine room, 20 is a compressor, 24 is a refrigeration side capillary tube (piping), 25 is a refrigeration side capillary tube (piping), 27 is a refrigeration side suction pipe (piping), 28 is a refrigeration side suction pipe (piping), 30 is a cold air supply duct, and 31 is a refrigeration side. Blower fan, 32 is refrigeration side cooler chamber (blower duct), 33 is refrigeration side water receiver, 34 is refrigeration side drain hose (pipe), 35 is defrosting water evaporating dish, 36 is blower duct, 38 is refrigeration side Cooler room (air duct), 39 is refrigeration fan, 40 is refrigeration Receiving part, 41 is a freezing side drain hose (pipe), 50 is a left side plate, 51 is a right side plate, 52 is a top plate, 52a is a stepped portion, 53 is a bottom plate, 53a is a stepped portion, 54 is a back plate, 56 is a left side Plate, 57 is a right side plate, 58 is a top plate, 58a is a step (housing recess), 59 is a bottom plate, 59a is a step (housing recess), 60 is a back plate, 61 to 63 are chamfered portions (housing recess), 64 is a recess, 65 is a pipe body (pipe), 66 to 70 are vacuum heat insulation panels (heat insulation), 71 and 71a to 71i are foam insulation (heat insulation), 72 is a roll coater, 76 to 78 are storage recesses, Reference numeral 79 denotes a pipe body (piping).

Claims (2)

An outer box having a left side plate, a right side plate, a top plate, a bottom plate and a back plate;
An inner box having a left side plate, a right side plate, a top plate, a bottom plate and a back plate corresponding to the left side plate, right side plate, top plate, bottom plate and back plate of the outer box,
A vacuum insulation panel disposed between the inner box and the outer box;
A foam heat insulating material filled between the inner box and the outer box;
A corner portion formed by the back plate of the inner box and at least one other plate connected to the back plate is formed with a chamfered portion,
Wherein the chamfer has members for connecting the portion of the insulation box inside the body is disposed,
The vacuum heat insulation panel disposed on the back plate side of the inner box, the vacuum heat insulation panel disposed on the left side plate side of the inner box, and the vacuum heat insulation panel disposed on the right side plate side of the inner box, Each protrudes toward the chamfered part,
Between the vacuum insulation panel and the inner box are formed to protrude inwardly of the inner box, and housing recess for housing in a state of being bent member for connecting the portion of the insulating box in the body is provided A heat insulating box characterized in that The duct through which the cold air flows is in a range where the vacuum heat insulation panel on the back plate side of the inner box is arranged in the left-right direction in the front view of the heat insulation box , and in the range inside the chamfered portion. The heat insulation box according to claim 1, wherein the heat insulation box is disposed on the heat insulation box.

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