JP2008309372A - Cooling storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To protect an electric wire led out of a heat insulating box without complicating work when forming the heat insulating box. <P>SOLUTION: The top opening 33 is formed by installing a connecting frame 70 made of a synthetic resin over an opening edge of a rectangular hole 51 of an external top plate 50 and an opening edge of a rectangular hole 61 of an interior top plate 60. The upper end of the connecting frame 70 is formed with a step retreated so as to be wider outward, and a space over the stepped surface 87 forms a housing recessed part 88. An electric wire insert hole 93 is opened in an extension part 92 extended from a corner of the stepped surface 87. When forming a casing of a main body 10 (the heat insulating box), a lead wire 46 arranged inside the casing is pulled out to the surface side through the electric wire insert hole 93, and housed once in the housing recessed part 88. In this condition, the casing of the heat insulating box is set in a foaming fixture J so as to form the heat insulating box, and after the casing is removed from the foaming fixture J, the lead wire 46 is pulled out of the housing recessed part 88. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an improvement in the structure of a portion for leading out an electric wire wired inside a heat insulation box constituting a storage body.

The refrigerator generally has a refrigerator body made of a heat-insulated box with a front opening in which the inner box is housed in an outer box with a space therebetween and a heat insulating material made of foamed resin is filled between the two boxes. The front opening of the main body has a structure that is opened and closed by a heat insulating door to which a packing is attached. On the other hand, a cord heater is attached to the back surface of the lip of the front opening in the refrigerator main body so as to prevent condensation on the surface of the lip and further freezing of the packing.
Here, conventionally, the lead wire connected to the cord heater is manufactured as follows in a portion where the lead wire is drawn out to the upper surface side of the refrigerator main body where the electrical box or the like is installed. That is, the outer shell of the heat insulation box is assembled with the code heater pasted on the back surface of the lip of the front opening, and the end of the lead wire is pulled out from the outlet formed in the outer box to the upper surface. It is fixed with a tape, and in this state, foamed resin is filled in the outer shell. This type of structure is described in Patent Document 1, for example.
Japanese Patent Laid-Open No. 11-30471

By the way, when forming the heat insulation box, the outer box and the inner box are pressed with a foaming jig so that the heat insulation box is not deformed by the foaming pressure of the foamed resin. Depending on how the lead wire is fixed, the lead wire may be sandwiched between the foaming jig and the outer box and the lead wire may be disconnected. In order to avoid it reliably, means for using a protective sheet or the like has been taken, but there is a problem that the work is troublesome.
The present invention has been completed based on the above circumstances, and its purpose is to protect the electric wires led out from the heat insulation box during formation of the heat insulation box without incurring work complexity. By the way.

  The present invention has a storage body made of a heat-insulated box body in which the inner box is accommodated in the outer box with a space and a heat insulating material made of foamed resin is filled between the two boxes, and the ceiling wall of the storage body is In the cooling storage provided with an opening for mounting the refrigeration unit, the opening is opened corresponding to the opening edge of the window hole opened in the top plate of the outer box and the top plate of the inner box. It is formed by attaching a synthetic resin connecting frame over the opening edge of the formed window hole, and on the surface of the connecting frame is formed an accommodating recess capable of accommodating an electric wire, and this accommodating recess Is characterized in that a wire insertion hole is formed on the back side of the connecting frame.

  According to the above configuration, when the outer box, the inner box, and the connecting frame are assembled to form the outer shell of the heat insulating box body, the electric wires arranged inside the outer shell are brought to the surface side through the electric wire insertion holes of the connecting frame. It is pulled out and once accommodated in the accommodating recess. The outer shell of the heat insulating box is set on a foaming jig, and the heat insulating material is foamed and filled in the outer shell to form a heat insulating box. After being removed from the foaming jig, the electric wire is pulled out from the housing recess. When the heat insulating material is foamed and filled, the electric wire can be stored in the housing recess of the connecting frame, and therefore the electric wire is prevented from being pressed by the foaming jig. Extra work such as attaching a protective member for the electric wire such as a protective sheet can be eliminated.

The following configuration may also be used.
The connection frame is formed in a stepped shape such that an upper end portion connected to the opening edge side of the outer box extends outward, and the accommodation recess is formed by a space above the step surface. The electric wire drawn out from the inside of the outer shell is accommodated in the accommodating recess above the step surface formed at the upper end of the connecting frame. The housing recess is formed with a simple shape.
The opening is formed in a square shape, and the step surface is formed over the entire circumference. A sufficient space can be secured as the housing recess. Therefore, the degree of freedom of the work procedure can be increased, for example, by attaching a connector to the end of the electric wire in advance.

From one corner of the step surface having the rectangular shape, an extending portion is formed flush with the step surface, and the wire insertion hole is formed in the extending portion. The extending portion can be used for positioning when the connecting frame is assembled.
A restriction wall is provided at the edge of the housing recess to restrict the electric wire from protruding outside the housing recess. It is avoided that the electric wire protrudes from the housing recess and interferes with the foaming jig.

  ADVANTAGE OF THE INVENTION According to this invention, the electric wire led out from the heat insulation box at the time of formation of a heat insulation box can be protected, without causing the complexity of an operation | work.

<Embodiment>
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In this embodiment, a four-door refrigerator is illustrated.
As shown in FIGS. 1 and 2, the refrigerator of the present embodiment has a main body 10 made of a slightly vertically long heat insulating box with a front opening. The main body 10 is roughly an inner box in which a plurality of panels made of metal plates such as stainless steel plates are assembled in an outer box 11 of a front opening formed by assembling a plurality of panels made of metal plates such as galvanized steel plates. 12 is accommodated at intervals, and is formed by foaming and filling a heat insulating material 13 made of foamed resin such as foamed urethane resin between both boxes 11 and 12.
The inside of the main body 10 is a refrigerating chamber 15, and a shelf network 17 can be installed in multiple stages via a shelf column 16, and the front opening 18 of the main body 10 has a heat insulating property assembled in a cross shape. A total of four doorways 20 are formed by attaching the partition frame 19. The doors 20 are each provided with a heat insulating door 21 having a packing 21A attached on the back surface, which is divided into upper and lower two stages so as to be openable and closable.

The main body 10 is supported by four illustrated legs 22 arranged on the bottom surface, and a machine room 24 is formed on the upper surface of the main body 10 by being surrounded by a panel. The machine room 24 is equipped with a refrigeration unit 25.
In the refrigeration unit 25, a refrigeration device 27 including a compressor 28, an air-cooled condenser 29, and the like is placed on the upper surface of a heat-insulating base 26 that forms a plane square, and a cooler 30 is suspended on the lower surface side. The refrigeration apparatus 27 and the cooler 30 are connected in a circulating manner through a refrigerant pipe.
On the other hand, on the bottom surface of the machine room 24, in other words, on the ceiling wall 32 of the main body 10, a top surface opening 33 made of a square hole that is slightly smaller than the base 26 is formed, and the base of the refrigeration unit 25 described above is formed. 26 is attached by closing the top surface opening 33 while passing the cooler 30 through the lower surface side of the top surface opening 33.

An air duct 35 that also serves as a drain pan is stretched on the lower surface side of the top surface opening 33 to form a cooler chamber 36. The cooler 30 is housed in the cooler chamber 36, and a suction port 37 is provided on the front side (left side in FIG. 2) of the air duct 35 and a cooling fan 38 is provided. Is provided with an air outlet 39.
Therefore, when the cooling fan 38 is driven, as shown by the arrow in FIG. 2, the air in the refrigerator compartment 15 is sucked into the cooler chamber 36 from the suction port 37, and after flowing through the cooler 30, from the outlet 39. A circulating flow is generated such that the air is blown out toward the refrigerator compartment 15, and the inside of the refrigerator compartment 15 is cooled. In addition, a defrosting operation is appropriately performed, and defrosted water from the cooler 30 and the like passes from a drain pipe 41 provided at the back end of the air duct 35 to a drain passage 42 provided on the back wall of the main body 10. It passes through and is drained to the outside.

Further, a front heater 45 made of a cord heater or the like is wired on the back surface of the mouth of the four entrances 20 formed in the front opening 18 of the main body 10, and condensation is formed on the surface of the mouth of the entrance 20. The packing 21A of the heat insulating door 21 is prevented from freezing. Specifically, as shown in FIG. 3, the front heater 45 is wired over the entire periphery of the rear edge of the front opening 18, and is wired to a cross-shaped partition frame 19 (not shown). One and two are provided.
Among these, the front heater 45 wired to the rear surface of the rim of the front opening 18 is wired in advance before the main body 10 (heat insulating box) is formed, as will be described in detail later. The lead wire 46 is drawn upward from the ceiling surface of the main body 10.
On the other hand, since the partition frame 19 is retrofitted to the front opening 18 of the main body 10, the lead wire (not shown) of the front heater wired to the partition frame 19 is attached to the main body 10 when the partition frame 19 is assembled. It penetrates the ceiling wall 32 and is drawn out upward.

In this embodiment, the structure of the part which leads out the lead wire 46 of the front heater 45 wired inside the main body 10 (heat insulating box) is added, and will be described below.
First, the structure of the top surface opening 33 provided in the ceiling wall 32 of the main body 10 will be described. As shown in FIG. 4, the outer shell of the ceiling wall 32 of the main body 10 includes a top plate 50 of the outer box 11 (hereinafter referred to as an exterior top plate 50) and a top plate 60 of the inner box 12 (hereinafter referred to as an interior top plate 60). And the connecting frame 70.
The exterior top plate 50 is made of a metal plate such as a galvanized steel plate as described above, and is formed in a flat rectangular shape that is long in the left-right direction when viewed from the front, and at the center in the width direction and in the depth direction. A square hole 51 that is long in the left-right direction is opened at a position close to the side. At the opening edge of the square hole 51, a short bent portion 52 bent at a right angle downward is formed over the entire circumference. In addition, a relief hole 53 is formed in the corner portion on the right front side of the same hole 51 by being cut out toward the front side.

  The interior top plate 60 is arranged at a predetermined interval on the lower surface side of the exterior top plate 50, and is made of a metal plate such as a stainless steel plate as described above. It is formed in a flat rectangular shape that is long in the horizontal direction. A square hole 61 that is slightly smaller than the square hole 51 is also opened in the interior top board 60 at a concentric position immediately below the square hole 51 of the exterior top board 50. At the opening edge of the square hole 61 of the interior top plate 60, a short bent portion 62 that is bent at a right angle upward is formed over the entire circumference.

A connecting frame 70 is mounted between the opening edge of the square hole 51 of the exterior top plate 50 and the opening edge of the square hole 61 of the interior top plate 60. The connecting frame 70 is made of synthetic resin, and as shown in FIGS. 4 to 6, four peripheral walls 71 having a height almost equal to the interval between the exterior top plate 50 and the interior top plate 60 are circulated. It is formed in a plane square.
The cross-sectional shape of each peripheral wall 71 is a stepped shape in which a horizontal wall 73 projects outward from the upper end of the vertical wall 72 and a thick wall 74U rises on the upper surface over the entire circumference of the projecting end of the horizontal wall 73. It has become. On the upper surface of the upper thick portion 74U of the peripheral wall 71, an insertion groove 75U into which a bent portion 52 formed downward is formed at the opening edge of the square hole 51 of the exterior top plate 50 is formed over the entire circumference. ing.

  The upper edge position of the outer side surface of the insertion groove 75U described above, specifically, along the upper edge of the outer side surface at two positions that divide the entire length into three equal parts in the two insertion grooves 75U on the long side. In the two insertion grooves 75U on the short side, the horizontally long locking projections 77U are respectively provided at the positions along the upper edge of the outer side surface at two positions close to both ends in the length direction. Is formed. On the other hand, a locking hole 55 into which the locking protrusion 77U is fitted is opened at the base portion of the bent portion 52 of the exterior top plate 50 at each position corresponding to each locking protrusion 77U. An outward flange 82U is formed over the entire circumference at the protruding end of the outer side wall of the insertion groove 75U, and the upper surface of the flange 82U is on the lower surface side at the opening edge of the square hole 51 of the exterior top plate 50 ( The contact surface 83U is in close contact with the edge portion 51A on the inner surface side.

Further, a lower thick portion 74D is formed on the entire outer surface of the lower end portion of the vertical wall 72 of each peripheral wall 71, and the interior top plate 60 is formed on the lower surface of the lower thick portion 74D. An insertion groove 75D into which a bent portion 62 formed upward is inserted into the opening edge of the square hole 61 is formed over the entire circumference.
The lower edge position of the outer side surface in the lower insertion groove 75D, similarly, the two insertion grooves 75D on the long side are along the lower edge of the outer side surface at two positions that divide the entire length into approximately three equal parts. In the two insertion grooves 75D on the short side, the horizontally long locking projections 77D are respectively provided at the positions along the lower edge of the outer side surface at two positions close to both ends in the length direction. Is formed. On the other hand, a locking hole 65 into which the locking projection 77D is fitted is opened at the base portion of the bent portion 62 of the interior top plate 60 for each position corresponding to each locking projection 77D. Similarly, an outward flange 82D is formed over the entire circumference at the protruding end of the outer side wall of the insertion groove 75D, and the lower surface of this flange 82D is the upper surface at the opening edge of the square hole 61 of the interior top plate 60. The contact surface 83D is in close contact with the side edge (inner surface side) edge 61A.

As described above, the inner peripheral portion of the upper surface of the connecting frame 70 is formed with a stepped surface 87 that forms a square ring in a form that is stepped down over the entire circumference, and above the stepped surface 87. The space is a housing recess 88 of the lead wire 46.
Further, an overhanging portion 90 is formed so as to protrude from the corner on the upper right side of the upper surface of the connecting frame 70 to the front, and the overhanging portion 90 has a right front of the step surface 87 described above. An extending portion 92 is formed so as to extend forward from the corner portion in a state flush with the stepped surface 87. As shown in FIG. 7, the extending portion 92 is formed to correspond to the lower portion of the escape hole 53 of the square hole 51 of the exterior top plate 50, and the extending portion 92 includes a lead wire. An electric wire insertion hole 93 through which 46 can be inserted is opened.
Further, at the four inner corners of the stepped surface 87, planar angle-shaped regulating walls 95 with rounded corners are formed to rise. The restriction wall 95 is about half the height of the upper thick portion 74U.

Subsequently, an example of a manufacturing procedure of the main body 10 will be described.
The outer box 11 is assembled in a form that excludes the exterior top plate 50 from the box shape of the front opening (including the upper edge of the front opening 18), and a drainage channel 42 is provided on the inner surface thereof. As shown in FIG. 3, a front heater 45 is wired on the back side of the rim of the front opening 18. For example, the front heater 45 is wired so as to return from the upper right corner on the back edge of the front opening 18 along the upper edge, left edge, lower edge, and right edge and back to the upper right corner. Affixed with tape or the like. Lead wires 46 connected to both ends of the front heater 45 are extended in a free state.

  The inner box 12 is assembled in a box shape with a front opening, and a connecting frame 70 is assembled to the opening edge on the upper side of the square hole 61 of the interior top plate 60. For this purpose, the connecting frame 70 is in such a posture that the wire insertion hole 93 comes to the right front corner, and the insertion groove 75D on the lower surface of the connecting frame 70 is provided at the opening edge of the square hole 61 of the interior top plate 60. It is inserted toward the upward bent portion 62. Then, the upper edge of the bent portion 62 is pushed in while being elastically deformed against the locking projection 77D, and the lower contact surface 83D of the connecting frame 70 is the rim portion 61A on the upper surface side of the square hole 61 of the interior top plate 60. When it is pushed in until it hits, the upper edge of the locking hole 65 passes through the locking projection 77D, so that the locking projection 77D fits and locks into the locking hole 65 while the bent portion 62 is restored and deformed. Such a locking operation is performed for each portion where the set of the locking projection 77D and the locking hole 65 is provided, whereby the lower edge of the connecting frame 70 is located on the upper side of the square hole 61 of the interior top plate 60. It is attached to the opening edge while preventing it from coming off.

The inner box 12 with the connection frame 70 mounted in this way is accommodated in the outer box 11 with a predetermined interval through a spacer (not shown). At this time, the lead wire 46 of the front heater 45 extends from the right front corner of the interior top plate 60 along the upper surface of the interior top plate 60, as shown in FIG. 9 and FIG. It is wired below the extending portion 92 of the step surface 87, and further drawn upward through the electric wire insertion hole 93, and once accommodated on the step surface 87, that is, along the accommodating recess 88, as shown in FIGS. Is done.
From this state, the exterior top plate 50 is stretched on the top surface of the outer box 11. Specifically, the exterior top plate 50 is placed in a posture in which the escape hole 53 of the square hole 51 comes to the right front side, and is fitted to the opened top surface of the outer box 10. A downward bent portion 52 provided at the opening edge of the hole 51 is inserted into the insertion groove 75 </ b> U on the upper surface of the connection frame 70. The downward bent portion 52 is pushed in while being elastically deformed by hitting the locking projection 77U, and is pushed in until the lip portion 51A on the lower surface side of the square hole 51 of the exterior top plate 50 hits the upper contact surface 83U in the connecting frame 70. Since the lower edge of the locking hole 55 passes through the locking projection 77U, the locking projection 77U fits into the locking hole 55 and is locked while the bent portion 52 is restored and deformed. Such a locking operation is performed for each portion where the set of the locking projection 77U and the locking hole 55 is provided, whereby the upper edge of the connecting frame 70 is located on the lower side of the square hole 51 of the exterior top plate 50. It is attached to the opening edge while preventing it from coming off. The exterior top plate 50 is fixed to the top surface of the outer box 11.

Thus, the outer shell of the top surface opening 33 is formed. At the same time, the opening edges of the outer box 11 and the inner box 12 are connected to each other while being closed with a synthetic resin joiner, whereby the heat insulating box having the front opening 18 and the top opening 33 is provided. The outer shell of the body is formed.
The outer shell of such a heat insulating box is set in a foaming jig J (see FIG. 10) and pressed from both the inner and outer surfaces. For example, the heat insulating material 13 is injected from an inlet (not shown) formed in the outer box 11. A foamed urethane resin stock solution is injected and foamed and filled in the hollow space between the boxes 11 and 12 to form a heat insulating box.
At this time, the portion of the lead wire 46 of the front heater 45 that should be drawn above the exterior top plate 50 is accommodated in the accommodation recess 88 that is one step lower than the top surface of the exterior top plate 50. Is prevented from being pressed by the foaming jig J.

When the heat insulation box is formed as described above, the lead wire 46 housed in the housing recess 88 of the connection frame 70 is moved upward through the escape hole 53 of the square hole 51 of the exterior top plate 50 as shown in FIG. Pulled out. Then, the base 26 of the refrigeration unit 25 is installed so as to close the upper surface of the top opening 33, and at that time, the leading end of the lead wire 46 is an insertion hole (see FIG. Through the upper surface of the base 26.
In addition, an air duct 35 equipped with a cooling fan 38 is applied so as to cover the lower surface side of the top surface opening 33 while being suspended, and is fixed by, for example, screwing the front peripheral edge at three locations. The Further, a heat insulating partition frame 19 assembled in a cross shape is attached to the front opening 18, and a heat insulating door 21 is attached to the entrance 20 formed thereby.

  As described above, according to the present embodiment, the connecting frame 70 constituting the top surface opening portion 33 is provided with the receiving recess 88 that can receive the lead wire 46 drawn from the inside of the heat insulating box body. When the outer shell is set on the foaming jig J to form a body, the lead wire 46 is prevented from being pressed by the foaming jig J. This eliminates the need for extra work such as attaching a protective member for the lead wire 46 such as a protective sheet. As a result, the lead wire 46 led out from the heat insulation box can be protected when forming the heat insulation box without incurring work complexity.

  The housing recess 88 of the connecting frame 70 is provided by forming a stepped shape with the upper end retreated so as to expand outward, that is, the structure of the connecting frame 70 itself can be handled with a simple structure. it can. Moreover, since the accommodation recessed part 88 is formed over the perimeter of the inner peripheral part of the upper surface of the connection frame 70, sufficient space is ensured, for example, attaching a connector to the terminal of the lead wire 46 beforehand, etc. The degree of freedom of the procedure can be increased.

Further, the connecting frame 70 has a shape in which an extending portion 92 is formed to extend from one corner portion of the stepped surface 87, and the extending portion 92 is aligned with the escape hole 53 of the square hole 51 of the exterior top plate 50. The orientation of the connecting frame 70 when the connecting frame 70 is attached to the lower surface of the square hole 51 of the exterior top plate 50 can be easily determined.
Further, since the regulation walls 95 are formed to rise at the four corners inside the stepped surface 87, the lead wire 46 is prevented from coming off from the housing recess 88. For example, the lead wire 46 hangs downward to form the foaming jig and the interior top plate 60. It is prevented from being caught between.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the step surface is provided over the entire circumference so as to form the lead recessed portion. However, a part of the peripheral area such as one side edge or two adjacent side edges. You may make it provide only.
(2) The restriction wall for restricting the lead wire from coming off may be set not only at the four corners but also over a wider range.
(3) The housing recess provided in the connection frame may be provided in another form, for example, a midway position in the height direction of the peripheral wall is recessed on the back surface side.

(4) The top surface opening, and thus the connecting frame, is not limited to the planar shape illustrated in the above embodiment, but may be any planar shape with the base of the refrigeration unit.
(5) The present invention is not limited to the lead wire of the front heater exemplified in the above embodiment, but, for example, the lead wire of the heater when a drain heater is provided at the inlet of the drainage channel provided in the back wall of the main body is necessary. Can be widely applied to all devices having electric wires previously wired inside the main body (heat insulating box) and led out to the outside.

The external appearance perspective view of the refrigerator which concerns on one Embodiment of this invention Same longitudinal section Perspective view of heat insulation box Exploded perspective view of the outer shell of the ceiling wall Exploded sectional view of the same part Top view of connecting frame Exploded perspective view showing the arrangement part of the wire insertion hole Sectional drawing cut | disconnected by the XX line of FIG. 6 in the outer shell of a ceiling wall Sectional drawing cut | disconnected by the YY line of FIG. 6 in the outer shell of a ceiling wall Partial cross-sectional view with the outer shell of the heat insulation box set on a foaming jig The partial top view which shows the state in which the lead wire was accommodated in the accommodation recessed part Partial perspective view

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Refrigerator main body (storage main body, heat insulation box) 11 ... Outer box 12 ... Inner box 13 ... Heat insulation material 25 ... Refrigeration unit 26 ... Base 32 ... Ceiling wall 33 ... Top surface opening part (opening part) 45 ... Front heater 46 ... Lead wire (electric wire) (front heater 45) 50 ... Exterior top plate 51 ... Square hole (window hole) 60 ... Interior top plate 61 ... Square hole (window hole) 70 ... Connecting frame 87 ... Step surface 88 ... Accommodating Recessed portion 90 ... Overhang portion 92 ... Extension portion 93 ... Electric wire insertion hole 95 ... Restriction wall J ... Foaming jig

Claims (5)

The inner box is stored in the outer box with a space between them, and a storage body made of a heat insulating box filled with heat insulating material made of foamed resin is placed between both boxes, and a refrigeration unit is mounted on the ceiling wall of this storage body In the cooling storage provided with an opening for
The opening extends between the opening edge of the window hole opened in the top plate of the outer box and the opening edge of the window hole opened corresponding to the top plate of the inner box. The connecting recess is formed on the surface of the connecting frame, and an accommodating recess capable of accommodating an electric wire is formed on the surface of the connecting frame, and an electric wire insertion hole opening on the back side of the connecting frame is formed in the accommodating recess. Cooling storage, characterized by The connecting frame is formed in a stepped shape such that an upper end connected to the opening edge side of the outer box extends outward, and the housing recess is formed by a space above the stepped surface. The cooling storage according to claim 1. The cooling storage according to claim 2, wherein the opening is formed in a square shape, and the step surface is formed over the entire circumference. The extension part is formed from the corner part of the step surface having the rectangular shape so as to be flush with the step surface, and the wire insertion hole is formed in the extension part. Cooling storage. 5. The cooling according to claim 1, wherein a restriction wall that restricts an electric wire from protruding outside the accommodation recess is provided at an edge of the accommodation recess. Storage.

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