JP4128172B2 - Heat insulation box and method for manufacturing heat insulation box - Google Patents

Description

  In the present invention, a filling space of foam heat insulating material is formed between an outer box (outer wall plate) and an inner box (inner wall plate), and a vacuum heat insulating material is pasted on the filling space side of the outer box (outer wall plate) 2A. The present invention relates to a heat-insulated box body such as a worn refrigerator.

  When manufacturing a heat insulation box for a refrigerator, the foam insulation material is injected into the filling space of the foam insulation material formed between the combined outer box and inner box, and the foam insulation material is injected into this filling space. Although it is filled, measures to improve the heat insulation performance of the heat insulation box without changing the external dimensions and internal volume of the heat insulation box, and the storage of goods in the refrigerator without changing the external dimensions and internal volume of the heat insulation box As a measure for reducing the thickness of the filling space in a state where the heat insulation performance is not lowered in order to increase the internal volume, an expensive vacuum heat insulating material with good heat insulation performance is attached to a part of the filling space, and the rest A method of filling the portion with a foamable resin is employed.

In this method, in a state where the heat insulation performance is concerned, for example, a vacuum heat insulating material is attached to the surface of the outer space of the outer box such as a part corresponding to the freezer compartment, the polyurethane resin is placed in the filling space. The stock solution is injected to form a heat insulating layer integrated with the vacuum heat insulating material. The vacuum heat insulating material in this case is, for example, putting a fine powder such as silica or pearlite and a heat insulating material such as glass fiber or open-cell foamed polyurethane in a bag of a gas barrier film through which gas such as air does not permeate. The bag is sealed with the gas barrier film bag evacuated to a vacuum state. Such a technique is described in, for example, Japanese Patent Application Laid-Open No. 10-253246.
JP-A-10-253246

  In the invention of this Patent Document 1, a box body in which an outer box and an inner box are combined with the front opening at the lower side, from the injection hole on the rear surface of the box body which is the upper surface, the outer box and the inner box In the process of foaming by injecting a raw material of foam insulation into the filling space of the foam insulation formed between them, the air at the time of foaming is usually released from the air vent hole of this filling space formed in the outer box, but vacuum By attaching the heat insulating material, the air vent hole of this outer box is blocked by the vacuum heat insulating material, resulting in poor air venting at that part, and the rise of the foamed heat insulating material is worsened at that part, and poor filling is caused. In order to improve this, an air vent hole is also formed in the inner box. As a specific example in this case, since the vacuum heat insulating material is attached to the left and right side surfaces, the back surface, and the bottom surface corresponding to the freezer and the cooler, the growth failure of the foam heat insulating material in the filling space at this portion is likely to occur. In particular, an air vent hole is formed on the back surface of the inner box corresponding to the cooler which is the final foamed portion, and filling failure of the foam heat insulating material in this portion is prevented.

  In the present invention, a filling space of a foam heat insulating material is formed between an outer box (outer wall plate) and an inner box (inner wall plate), and a vacuum heat insulating material is adhered to the filling space side of the outer box (outer wall plate). In the manufacturing method of the heat insulation box body, the poor filling of the foam heat insulating material due to the poor air venting due to the attachment of the vacuum heat insulating material is the same as described above, but the solving means and the action thereof This is significantly different from Patent Document 1 in terms of effects.

  That is, in Patent Document 1, the air vent hole formed in the inner box is a relatively large air vent hole because the foam heat insulating material blocks the air vent hole with a nonwoven fabric in order to allow only air to pass therethrough. In the present invention, it is not necessary to close the air vent hole with the nonwoven fabric, the foam insulation material filled in the filling space does not leak, the air escape is good, and the inner box (inner wall plate) is easy to form the air vent hole. ) To provide structure.

According to a first aspect of the present invention, a space for filling foam insulation is formed between an outer box (outer wall plate) and an inner box (inner wall plate), and a vacuum heat insulating material is provided on the filling space side of the outer box (outer wall plate). In the adhered heat insulation box, the inner box (inner wall) is formed so that the tongue protrudes on the wall opposite to the filling space side on the wall of the inner box (inner wall plate) of the final filling portion of the foam heat insulating material. A small-diameter air outflow hole is formed integrally with the plate), and the air outflow hole is opened in the middle of foaming of the foam heat insulating material. A tongue is provided that is pressed in a direction to close the air outflow hole by contact with a foaming jig disposed on an inner box (inner wall plate).

According to a second aspect of the present invention, a space for filling foam insulation is formed between an outer box (outer wall plate) and an inner box (inner wall plate), and a vacuum heat insulating material is provided on the filling space side of the outer box (outer wall plate). In the manufacturing method of the bonded heat insulation box, a large number of small-diameter air outflow holes are integrally formed on the wall of the final filling portion of the foam insulation so that the tongue protrudes on the side opposite to the filling space side. The inner box (inner wall plate) is prepared, and a combination box body of the outer box (outer wall plate) and the inner box (inner wall plate) to which the vacuum heat insulating material is adhered is secured to the protrusion of the tongue. In the state where the wall of the final filling portion is separated from the foaming jig, the foaming jig is set in a foaming jig, and in the middle of foaming of the foam heat insulating material, the air in the filling space flows out from the air outflow hole, and the foaming The expansion of the inner box (inner wall plate) due to the progress of foaming of the heat insulating material is caused by the foaming jig. By the relationship in which the tongue closes the air outlet hole by being restricted and forming an insulating layer of the foam insulation.

In the first invention, since the tongue formed in the inner box (inner wall plate) is in an open state in the middle of foaming of the foam heat insulating material, the air in the filling space pushed up with foaming of the foam heat insulating material is Since it flows out well from the air outflow hole of the (outer wall plate) and the air outflow hole of the inner box (inner wall plate), the growth of the foam heat insulating material is stabilized. Then, the tongue is pressed in the direction of closing the air outflow hole by the contact with the foaming jig caused by the expansion of the inner box (inner wall plate) with the foam filling of the foam heat insulating material. No special means for closing is required. For this reason, it is not necessary to use a non-woven fabric that allows only air to pass through without leaking the foam heat insulating material from the air vent hole, and an operation of attaching such a non-woven fabric is also unnecessary. Further, even if the cold air duct is formed by using the surface of the inner box (inner wall plate), the tongue does not hinder the air flow.

In the second aspect of the invention, the inner box (inner wall plate) wall on the final foaming side is set in a state where it is slightly lifted from the foaming jig and foam filling is performed, so that the tongue is pushed by the foaming jig during foaming. Since the air outflow hole is not open, the inner box (inner wall plate) expands with the progress of foaming, and as the air blowout gradually closes, the air outflow hole gradually closes. The following effects can be obtained.

In the invention of the present invention, a filling space of foam heat insulating material is formed between an outer box (outer wall plate) and an inner box (inner wall plate), and a vacuum heat insulating material is pasted on the filling space side of the outer box (outer wall plate). The inner box (inner wall plate) is attached to the wall of the inner box (inner wall plate) at the final filling portion of the foam heat insulating material so that the tongue protrudes on the side opposite to the filling space side. ) And a small-diameter air outflow hole are formed integrally with the foamed heat insulating material, and the air outflow hole is opened in the middle of foaming of the foamed heat insulating material. An embodiment of the present invention will be described below, which is provided with a tongue that is pressed in a direction to close the air outflow hole by contact with a foaming jig disposed on a box (inner wall plate) .

  Next, the refrigerator main body which is one of the heat insulation boxes is demonstrated as embodiment of this invention. 1 is a front view of a refrigerator according to the present invention, FIG. 2 is an explanatory view of the refrigerator main body according to the present invention as viewed from the front, FIG. 3 is a longitudinal side view of the refrigerator according to the present invention, and FIG. FIG. 5 is a front view of a box that combines a box (outer wall plate) and an inner box (inner wall plate), and FIG. 5 is a foam insulation material for the box that combines the outer box (outer wall plate) and the inner box (inner wall plate) according to the present invention. FIG. 6 is a cross-sectional view for explaining the state of filling the container, and FIG. 6 shows the vicinity of the air outflow hole when a box body in which the outer box (outer wall plate) and the inner box (inner wall plate) according to the present invention are combined is set on a foaming jig. FIG. 7 is a cross-sectional view, FIG. 7 is a cross-sectional view of the vicinity of an air outflow hole for explaining a state in which a foam body is filled in a box that combines an outer box (outer wall plate) and an inner box (inner wall plate) according to the present invention. FIG. 9 is a front view showing the shape of the air outflow hole according to the present invention, and FIG. 9 is a sectional view taken along the line PP in FIG.

  The refrigerator 1 according to the first embodiment has a configuration in which a main body 2 having a front opening is partitioned to form a plurality of storage chambers, and the front surfaces of these storage chambers can be opened and closed by doors. The refrigerator main body 2 is a heat insulating box having a heat insulating structure in which a foam heat insulating material 2C is filled between an outer box (outer wall plate) 2A and a vacuum formed inner box (inner wall plate) 2B having a thickness of 1.2 mm to 0.8 mm. Is the body. In the refrigerator main body 2, a refrigerator compartment 3, a freezer compartment 5, and a vegetable compartment 4 are partitioned and provided from above.

  The front opening of the refrigerator compartment 3 is opened and closed by a revolving refrigerator door 10 that is rotated laterally by a hinge device on one side of the refrigerator body 2. The front opening of the vegetable compartment 4 is blocked by a pull-out door 11 that is drawn forward together with a vegetable container 15 supported so as to be able to be pulled out in the front-rear direction by a support device 18 using left and right rails and rollers provided in the vegetable compartment 4. Yes. The front opening of the freezer compartment 5 is closed at one side of the refrigerator body 2 by a pivotable door 12 that pivots laterally by a hinge device. The container supported so that it can be pulled out in the front-rear direction with respect to the provided left and right rails may be configured to be pulled out together with the door 12.

  20 is a refrigerant compressor for the refrigeration cycle, and 21 is a refrigerant condenser for the refrigeration cycle. Reference numeral 22 denotes an evaporating dish for evaporating defrosted water, which will be described later, by the heat of the condenser 21. The evaporating dish 22 is placed on the condenser 21 and can be pulled out from the lower front of the refrigerator body 2. The compressor 20, the condenser 21, and the evaporating dish 22 are installed in a machine room 23 provided in the lower part of the refrigerator body 2. Reference numeral 24 denotes a refrigerant evaporator (cooler) installed in a cooler chamber 26 formed on the back surface of the freezer compartment 5. A blower 25 circulates the cold air cooled by the evaporator (cooler) 24 to the freezer compartment 5, the refrigerator compartment 3, and the vegetable compartment 4. Reference numeral 27 denotes a glass tube heater for defrosting the evaporator (cooler) 24. The defrosted water in the evaporator (cooler) 24 is guided to the evaporating dish 22 through the drain pipe and is evaporated there.

  The refrigerator compartment 3 positioned at the upper part and the freezer compartment 5 positioned at the lower part thereof are partitioned by a heat insulating partition wall 28, and the heat insulating partition wall 28 is made of an injection molded synthetic resin upper plate and an injection molded synthetic resin. A heat insulating structure is formed in which a heat insulating material such as polystyrene foam previously molded into a predetermined shape is sandwiched between the lower plate. Such a heat insulating partition wall 28 is formed in a groove formed in the front-rear direction on the left and right side walls of the inner box (inner wall plate) 2B of the refrigerator body 2 and a front opening groove formed in the rear wall of the inner box (inner wall plate) 2B. It is the structure inserted and attached from the front opening part of the refrigerator main body 2. FIG.

  Reference numeral 32 denotes a back wall member of the refrigerator compartment 3 disposed on the front side of the back wall of the refrigerator main body 2 with a space from the back wall, and a heat insulating material such as a polystyrene back plate attached to the back side of the synthetic resin. The cooling air supply passage 35 is formed in the vertical direction on the back side of the refrigerator compartment 3, and the cooling air passage 35A is formed on both the left and right sides thereof.

  In the rear part of the heat insulating partition wall 28, a cold air supply passage 36 penetrating up and down the heat insulating partition wall 28 is formed. The cold air supply passage 36 has a lower portion serving as an introduction portion of the cold air supplied from the blower 25, and an upper portion thereof. The arrangement communicates with the cold air supply passage 35. A damper device 50 is attached to the cold air supply passage 36, and the damper device 50 operates to open and close the cold air supply passage 36 by the control circuit unit based on temperature sensing of a sensor that senses the temperature of the refrigerator compartment 3. The refrigerator compartment 3 is controlled to a predetermined temperature by the opening / closing operation of the damper device 50.

  In the freezer compartment 5, an ice making chamber 6 having a front opening that is kept at the freezing temperature on the left side by a partition plate 47 and a freezing compartment 5A that is kept at the freezing temperature on the right side are partitioned and formed in the ice making chamber 6. An automatic ice making machine 7 is disposed, and an ice storage container 8 (also referred to as an ice storage box 8) having an upper opening is disposed below the automatic ice making machine 7. The ice storage container 8 is supported by a rail 6A provided on the left and right side walls of the ice making chamber 6 so as to be detachable by being drawn in the front-rear direction. The automatic ice maker 7 includes an electric mechanism 7A and an ice making tray 7B that rotates by the electric mechanism 7A and performs an ice removing operation by twisting. The ice making chamber 6 has its front opening opened by opening the door 12, and the ice storage container 8 can be taken out forward. The front opening of the ice making chamber 6 and the freezer compartment 5A may be configured to be openable and closable by separate doors.

  Reference numeral 9 denotes a water supply container (also referred to as a water storage container) for storing ice making water supplied to the automatic ice making machine 7. The water supply container 9 has a rectangular shape whose depth is longer than the horizontal width, and is formed by partitioning the inside of the refrigerator compartment 3 by a partition wall 45. It is arrange | positioned at the small chamber 46, it cools with the temperature in the refrigerator compartment 3, and the water supply container 9 can be taken out ahead of the refrigerator 1 with the handle 9S by opening the front door 10 of the refrigerator compartment 3.

  In the refrigerator 1, the refrigerant compressed by the compressor 20 is condensed by the condenser 21, then depressurized through an expansion valve or a capillary tube, evaporated by the evaporator (cooler) 24, and returned to the compressor 20, and again the compressor A refrigeration system that compresses at 20 and repeats the same circulation is configured. The cold air cooled by the evaporator (cooler) 24 is circulated by an air blower 25 as shown by an arrow. That is, the cold air sent out from the blower 25 is supplied from the cold air outlet 37 at the upper back wall of the freezer room 5 to the ice tray 7B of the freezer room 5 and the ice making room 6, and the cold air inlet 38 at the lower back wall of the freezer room 5 is supplied. Then, the refrigerant is returned to the cooler chamber 26 and circulated again by the evaporator (cooler) 24. Further, the cold air sent out from the blower 25 is supplied to the cold air supply passage 35 through the cold air supply passage 36, circulates in the cold air passages 35 </ b> A formed on the left and right sides of the cold air supply passage 35, and the back wall 32 of the refrigerator compartment 3. Is supplied to the refrigerator compartment 3 from the cold air outlet 39 formed in the above.

  The cold air supplied to the refrigerating room 3 is sucked from a cold air suction port 40 formed at one lower part of the back wall 32 of the refrigerating room 3 and flows downward through a cold air passage 41 formed at the rear of the freezing room 5. It blows out to the vegetable compartment 4 from the cold air outlet 42 opened at the rear part of the compartment 4. The cold air blown into the vegetable room 4 cools the vegetables in the vegetable container 15 and returns to the cooler room 26 from the cold air inlet 43 opened at the upper part of the vegetable room 4 or at the rear part of the vegetable room 4, and again the evaporator. (Cooler) circulates cooled by 24.

  The ice making water may be pumped from the water supply container 9 by a pump and supplied to the ice tray 7B of the automatic ice maker 7. However, in the embodiment, the ice making tray 7B of the automatic ice maker 7 is supplied through the water supply channel 51 by the natural fall method. The structure supplied to is shown.

  The refrigerator main body 2 has a heat insulating structure in which a foam heat insulating material 2C is filled in a foam heat insulating material filling space 2D between a metal outer box (outer wall plate) 2A and a synthetic resin inner box (inner wall plate) 2B. Although it is a heat insulation box, in order to improve the heat insulation performance of the refrigerator main body 2 without changing the external dimensions and internal volume of the refrigerator main body 2, a vacuum heat insulating material is provided on the filling space 2D side of the outer box (outer wall plate) 2A. A method of filling the remaining filling space 2D with the foam heat insulating material 2C is adopted. Moreover, in order to enlarge the article accommodation volume of the refrigerator main body 2 without changing the external dimensions and the internal volume of the refrigerator main body 2, as a method of reducing the thickness of the filling space 2D without reducing the heat insulating performance, as described above. In some cases, a vacuum heat insulating material is attached to the filling space 2D side of the outer box (outer wall plate) 2A.

  In such a case, the vacuum heat insulating material 65 is arranged at a position corresponding to the low temperature region in the refrigerator main body 2. In the embodiment, since the freezer compartment 5 is at a temperature of −20 ° C. or lower, the temperature difference between the freezer compartment 5 and the ambient temperature of the refrigerator main body 2 becomes extremely large. Therefore, it is necessary to sufficiently insulate this portion. In particular, since the cooler chamber 26 is formed on the back side of the freezer compartment 5, the temperature difference between the back side of the freezer compartment 5 and the ambient temperature of the refrigerator body 2 becomes extremely large. There is a need to. For this reason, the flat vacuum heat insulating material 65 is affixed on the side of the filling space 2D of the outer box (outer wall plate) 2A corresponding to the back surface and the left and right side surfaces of the freezer compartment 5. In consideration of the heat insulating performance, the thickness of the vacuum heat insulating material 65 corresponding to the left and right side surfaces of the freezer compartment 5 is about 15 mm, and the thickness of the vacuum heat insulating material 65 corresponding to the back surface of the freezer room 5 is about 20 mm.

  In addition, although the vacuum heat insulating material 66 is stuck also to the filling space 2D side of the outer box (outer wall plate) 2A corresponding to the back side of the refrigerator compartment 3, the low temperature cold air flows to the back side of the refrigerator compartment 3. Since the cold air supply passage 35 and the cold air passage 35A are formed, the heat insulation performance of this portion is improved. The thickness of the vacuum heat insulating material 66 is approximately 15 mm.

  Such vacuum heat insulating materials 65 and 66, for example, put a fine powder such as silica and pearlite and a heat insulating material such as glass fiber or open-cell foamed polyurethane in a bag of a gas barrier film through which gas such as air does not permeate, The bag is sealed in a state where the inside of the bag of the gas barrier film is evacuated to a vacuum state by the exhaust device.

  The outer box (outer wall plate) 2A to which the vacuum heat insulating material 65 (or 65, 66) is attached in this way and the inner box (inner wall plate) 2B made of synthetic resin are combined at the front flange portion 2E to the front surface. A box body 60 having an opening 60A is formed, and the box body 60 is covered with an inner box side foaming jig 61 with the front surface opening 60A facing downward, as shown in FIG. The tool 62 is set so as to contact the outer surface of the outer box (outer wall plate) 2A. The outer box side foaming jig 62 may be divided into front and rear sides, left and right sides, and upper parts, and these may be combined by being actuated by a hydraulic device to constitute the outer box side foaming jig 62. .

  The back plate 2A1 of the outer box (outer wall plate) 2A is provided with an appropriate number of air outflow holes in a portion corresponding to the filling space 2D in advance, but the vacuum heat insulating material 65 (or 65, 66). ) Is in a state where some of these air outflow holes are blocked, and the air is not sufficiently vented from the filling space 2D when the foam insulation 2C is foam-filled in the filling space 2D. There is. For this reason, a synthetic resin inner box (inner wall board) combined with the outer box (outer wall board) 2A is used to compensate for the lack of air venting due to being blocked by the vacuum heat insulating material 65 (or 65, 66). An air outflow hole 70 is provided in advance in 2B. Thus, the inner box (inner wall plate) 2B in which the air outflow hole 70 is formed and the outer box (outer wall plate) 2A to which the vacuum heat insulating material 65 is attached are combined at the respective front flange portions 2E, and the above-mentioned A box 60 having a front opening 60A is formed.

  When the stock solution of the foam heat insulating material 2C rises while foaming and growing, this air outflow hole 70 is formed on the wall of the inner box (inner wall plate) 2B corresponding to at least the final portion (final region) filled with the foam heat insulating material 2C. As shown in FIG. 5, in the state where the box body 60 is set in the inner box side foaming jig 61 with the front opening 60A facing downward, the final filling portion is the inner box (inner wall plate). ) A portion corresponding to the back wall 2B1 of 2B. In the figure, in correspondence with the back wall 2B1 of the inner box (inner wall plate) 2B corresponding to the back surface of the freezer compartment 5, a flat vacuum heat insulating material 65 (or 65) is provided on the filling space 2D side of the outer box (outer wall plate) 2A. , 66) is stuck, and in this portion, the air outflow hole of the outer box (outer wall plate) 2A is blocked and air outflow is not possible. For this reason, when this portion becomes the final filling portion of the foam heat insulating material 2C, a large number of small diameter air outflow holes 70 are formed in a substantially uniform arrangement on the back wall 2B1 of the inner box (inner wall plate) 2B of this portion. If this is the case, the air venting of this part will be good.

  The air outflow hole 70 is formed by punching the inner box (inner wall plate) with a transverse diameter D of 8 mm to 12 mm so that the tongue 71 protrudes on the side opposite to the filling space 2D side (the inner box side foaming jig 61 side). ) Many are formed integrally with 2B. As one form thereof, the air outlet hole 70 and the tongue 71 that are simultaneously formed in this manner are formed by arc-shaped punching having a transverse diameter D of 10 mm. The arc shape is a circular arc shape, an elliptical arc shape, or the like. As shown in FIGS. 8 and 9, the tongue 71 is located on one side of the arc-shaped air outflow hole 70 on the side opposite to the filling space 2D side. In this state, the inner box side foaming jig 61 is bent obliquely in an inclined direction.

  With the box 60 set on the foaming jigs 61 and 62 as described above, the back wall 2B1 of the inner box (inner wall plate) 2B and the upper surface of the inner box-side foaming jig 61 are slightly separated from each other. But there are also. The distance between the back wall 2B1 of the inner box (inner wall plate) 2B and the upper surface of the inner box-side foaming jig 61 is such that the tongue 71 is slightly separated so as not to close the air outflow hole 70. If the thickness is approximately 1 to 5 mm, the object can be achieved.

  In this set state, the nozzle 69 of the foaming machine is inserted into the foam heat insulating material injection hole 68 formed in the outer box (outer wall plate) 2A at a position communicating with the filling space 2D, and the polyurethane as the foam heat insulating material 2C is inserted from the nozzle 69. Inject the stock solution. By this injection, the polyurethane stock solution starts to react while flowing to the back side of the front flange portion 2E at the lower end of the filling space 2D, and grows upward in the filling space 2D while expelling air from the filling space 2D. The air in the filling space 2D is discharged from the air outflow hole formed in the back plate 2A1 of the outer box (outer wall plate) 2A through the air passage formed in the outer box side foaming jig 62, and the inner box ( It is discharged from the air outflow hole 70 formed in the inner wall plate 2B through the air passage formed in the inner box side foaming jig 61.

  In this way, the filling space 2D corresponding to the back wall of the refrigerator main body 2 is also filled with polyurethane, which is the foam heat insulating material 2C, and the foaming pressure causes the inner box (inner wall plate) 2B of the foam heat insulating material 2C to progress. The back wall 2 </ b> B <b> 1 is pushed and swells toward the inner box side foaming jig 61, and the swelling is restricted by the inner box side foaming jig 61, so that the tongue 71 closes the air outflow hole 70. Pressed. In this way, the foam heat insulating material 2C is filled in the filling space 2D, and the vacuum heat insulating material 65 (or 65, 66) is surrounded by the foam heat insulating material 2C, and the vacuum heat insulation on the back wall side of the refrigerator main body 2 is achieved. When the portion corresponding to the material 65 (or 65, 66) becomes the final filling portion of the foam insulation 2C, a small-diameter air outflow hole 70 is formed in the back wall 2B1 of the inner box (inner wall plate) 2B of this portion. Therefore, the air venting of this portion is good, and no nest is formed in the foam heat insulating material 2C, and a good heat insulating layer is formed in the filling space 2D.

  The present invention can be applied to various refrigerators, freezers, thermostatic chambers and the like without departing from the technical scope of the present invention, and the shapes of the air outflow holes and the tongue can be made other than the above.

It is a front view of the refrigerator which concerns on this invention. Example 1 It is explanatory drawing which looked at the refrigerator main body which concerns on this invention from the front. Example 1 It is a vertical side view of the refrigerator which concerns on this invention. Example 1 It is a front view of the box which combined the outer box (outer wall board) and inner box (inner wall board) concerning the present invention. Example 1 It is sectional drawing for description of the state which fills the box which combined the outer box (outer wall board) and inner box (inner wall board) which concern on this invention with a foaming heat insulating material. Example 1 It is sectional drawing of the air outflow hole vicinity at the time of setting the box which combined the outer box (outer wall board) and inner box (inner wall board) which concern on this invention to the jig for foaming. Example 1 It is sectional drawing of the air outflow hole vicinity explaining the state with which the box which combined the outer box (outer wall board) and inner box (inner wall board) which concern on this invention was filled with the foam heat insulating material. Example 1 It is a front view which shows the shape of the air outflow hole which concerns on this invention. Example 1 It is PP sectional drawing of FIG. Example 1

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Refrigerator 2 ... Refrigerator main body 2A ... Outer box (outer wall board)
2A1..Back wall of outer box (outer wall board) 2B ... Inner box (inner wall board)
2B1 ··· Back wall of inner box (inner wall plate) 2C ··· Foam insulation material 2D · · · Filling space for foam insulation material 3 ··· Refrigeration room · 4 · Vegetable room · 5 · Freezer room ··· Cooler 25 .. Blower 60 .. Box 61.. Inner box side foaming jig 62.. Outer box side foaming jig 65, 66... Vacuum insulation material 68 .. Foam insulation material injection hole 70. Air outflow hole 71 ・ ・ Vero

Claims (2)

A heat insulating box in which a filling space of a foam heat insulating material is formed between an outer box (outer wall plate) and an inner box (inner wall plate), and a vacuum heat insulating material is attached to the filling space side of the outer box (outer wall plate). In the body, on the wall of the inner box (inner wall plate) of the final filling portion of the foam insulation material, the inner box (inner wall plate) has a small diameter integrally with the inner box (inner wall plate) so that the tongue protrudes on the opposite side to the filling space side. An air outflow hole is formed, and the air outflow hole is opened in the middle of foaming of the foam heat insulating material, and the inner box (inner wall plate) is filled with the filling of the foam heat insulating material. A heat insulating box provided with a tongue that is pressed in a direction to close the air outflow hole by contact with a foaming jig disposed on the wall. A heat insulating box in which a filling space of a foam heat insulating material is formed between an outer box (outer wall plate) and an inner box (inner wall plate), and a vacuum heat insulating material is attached to the filling space side of the outer box (outer wall plate). In the body manufacturing method, the inner box (in which a large number of small-diameter air outflow holes are integrally formed on the wall of the final filling portion of the foam heat insulating material so that the tongue protrudes on the side opposite to the filling space side) An inner wall plate), and a combination box body of the outer box (outer wall plate) and the inner box (inner wall plate) to which the vacuum heat insulating material is adhered is formed so as to secure the protrusion of the tongue. The wall is set in the foaming jig in a state separated from the foaming jig, and the air in the filling space flows out from the air outflow hole in the middle of foaming of the foamed heat insulating material, and the foaming of the foamed heat insulating material proceeds. The expansion of the inner box (inner wall plate) by the Method for producing a heat-insulating main body, wherein the tongue forms a heat insulating layer of the foam insulation by the relationship to close the air outlet hole through.

Images