JP2013204934A - Method for manufacturing heat insulation box body, heat insulation box body cooling apparatus and heat insulation box body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a heat insulation box body configured to alleviate the influence of a foaming pressure on a box body structure, while preventing deformation of an external shape, with excellent dimensional accuracy.SOLUTION: In a heat insulation box body manufacturing method, a cabinet 5 of a heat insulation box body is manufactured by preventing deformation of the box body due to foaming pressure after injecting a foam heat insulating material into space formed between an outer box and an inner box by using a foaming jig. The method includes a cooling step of cooling the cabinet 5 of the heat insulation box body by bringing the whole surface of the cabinet 5 of the heat insulation box body into contact with a surface of a cooling member 6 whose temperature is lower than a surface temperature of the cabinet 5 of the heat insulation box body extracted from the foaming jig.

Description

  INDUSTRIAL APPLICABILITY The present invention is used in, for example, a refrigerator, and a heat insulating box manufacturing method for manufacturing a heat insulating box by injecting a foam heat insulating material into a space formed between an outer box and an inner box, and a method for using the same. It is related with the heat insulation box body manufactured by the manufacturing method of the heat insulation box body cooling device and heat insulation box which are manufactured.

Conventionally, in a heat insulation box represented by a refrigerator, dimensional errors due to slight distortion or deformation of the structure can cause problems such as poor door assembly, complicated adjustment work, and impaired design. It led to a decline in quality. As a cause of causing problems of these dimensional defects and shape defects, for example, a process of manufacturing a heat insulating box body through a heat insulating material foaming process for forming a heat insulating material between an outer box and an inner box of a refrigerator or the like has a great influence.

  The manufacturing method of the heat insulation box in the conventional refrigerator is demonstrated in detail with reference to FIG.7 and FIG.8 (a)-FIG.8 (c).

  FIG. 7 is a perspective view schematically showing an arrangement configuration of heat insulating boxes in a conventional refrigerator. FIGS. 8A to 8C are longitudinal sectional views for explaining a heat insulating material foaming step in the conventional method for manufacturing a heat insulating box of a refrigerator, and FIG. FIG. 8B is a cross-sectional view of the heat insulation box housed in the foam jig after the heat insulating material is injected, and FIG. 8C is a foam treatment of the heat insulation box body. It is a longitudinal cross-sectional view which shows a mode that it takes out from a tool.

  As shown in FIG. 7, an outer box is formed from steel plates on each surface of a top plate 12 formed by bending a single steel plate into a U shape, left and right side plates 13 a and 13 b, a back plate 14 and a bottom plate 15. 16 is configured. A resin inner box 17 is fitted into the metal outer box 16 to assemble the box 11 before filling with the heat insulating material. A compressor mounting space 18 is provided below the back plate 14. In addition, the back plate 14 is provided with an injection port 19 for injecting a foam heat insulating material stock solution.

  At this time, a space for injecting and filling the heat insulating material is formed between the outer box 16 and the inner box 17. Further, in this space, refrigeration cycle parts, electrical parts, other mechanical parts, and the like are attached in advance. Since the box body 11 before filling the heat insulating material at this time is assembled only by fitting the peripheral portions of the outer box 16 and the inner box 17, the respective wall portions of the outer box 16 and the inner box 17 are very flexible. It is in.

  Thereafter, as shown in FIG. 8A, the box 11 is confined and fixed in the foaming jig 21 with the back plate 14 of the box 11 facing upward. In this state, the foamed insulating material stock solution is injected into the space of the box 11 from the injection head 25. The injection head 25 is used by being inserted into the injection head insertion port 24.

  Subsequently, the foamed heat insulating material stock solution is foamed and cured in a state as shown in FIG. 8B, whereby the heat insulating material 10 is filled with the heat insulating material to every corner in the space of the box 11 and has strength. It is formed. In the case of FIG. 8B, a high foaming pressure due to foaming is applied to the outer box 16 and the inner box 17.

  For this reason, it is necessary to fix the outer box 16 and the inner box 17 so as not to be deformed by the foaming pressure by the outer jig 23 surrounding the outer box 16 and the inner jig 22 supporting the inner side of the inner box 17. After a certain time, for example, about 10 minutes, the volume expansion due to the foaming reaction and the resin curing reaction is stabilized, and the foaming pressure gradually decreases.

  Further, when the foaming pressure is sufficiently lowered, the foaming jig 21 wound around the heat insulating box 10 is opened as shown in FIG. The heat insulation box 10 completed by filling the heat insulation material between the boxes 17 is taken out.

  The heat insulation box 10 at this time does not cause a sudden shape deformation, but reaction heat is still accumulated inside, and the heat insulation box 10 has a foaming pressure that may cause a further shape change. Can be said to be inherent. For this reason, in order to completely suppress the dimensional variation, it is necessary to sufficiently release the reaction heat inside the heat insulating material.

  In Patent Document 1, in a method for manufacturing a heat insulating door body, a stock solution of a foam heat insulating material is injected from the outside into a space portion of an empty heat insulating door body sandwiched between upper and lower mold foaming jigs. There has been proposed a heat insulating door body cooling method in which after a stock solution of heat insulating material is foamed and cured, when a lower mold foaming jig is removed, forced cooling is performed by a cooling device provided at a lower portion of the heat insulating door body.

  In this case, the forced cooling by the cooling device specifically blows air only inside by a blower.

JP 62-018226 A

  However, in the conventional cooling method for a heat insulating door disclosed in Patent Document 1, cooling is performed only from the lower surface of the heat insulating door. If this is the case, the reaction heat cannot be evenly cooled from above and below the heat insulating door. Therefore, if the upper mold is removed, there will be a difference in temperature between the lower side and the upper side of the heat insulating door body, the foam bubble shrinkage due to cooling will be different between the upper side and the lower side, and the outer shape of the heat insulating door body will be It will be deformed.

  In addition, the cooling of the conventional heat insulation door body is merely cooling by wind with a blower, and this requires low cooling efficiency and takes a long time, and may be a heat insulation door body. If it is a complicated shape, a difference in the temperature of the cooling area will occur due to shadows or the like at the back part, and deformation due to this will also occur.

  On the other hand, in the case of a door with a relatively flat structure, even if cooling is performed only from one side of the lower side, a large three-dimensional concavity such as a refrigerator housing can be obtained even if the cooling effect is obtained to some extent. In the case of the above-described structure, the cooling method of the conventional heat insulating door disclosed in Patent Document 1 is conversely, depending on the place such as the back of the outer box 16 side and the inner box 17 side, the cooling rate There is a risk that bias will occur and the deformation of the outer shape will be promoted. Also, the cooling effect itself is not sufficient depending on the location.

  The present invention solves the above-mentioned conventional problems, and can reduce the influence of the foaming pressure on the box structure, and can produce a heat-insulated box body having excellent dimensional accuracy without deformation of the outer shape. An object of the present invention is to provide a method for manufacturing a body, a heat insulating box cooling device used therefor, and a heat insulating box manufactured by the method for manufacturing the heat insulating box.

  The method for manufacturing a heat insulation box of the present invention prevents the deformation of the box due to the foaming pressure after injecting the foam insulation into the space formed between the outer box and the inner box using a foaming jig. Forming a heat insulation box and a cooling step in which a cooling member having a temperature lower than the surface temperature of the heat insulation box taken out from the foaming jig is in contact with the entire surface of the heat insulation box to cool the heat insulation box With this, the above-mentioned object is achieved.

  Preferably, the cooling step in the method for manufacturing a heat insulation box according to the present invention includes a part or all of the outer surface of the heat insulation box and a remaining part of the outer surface of the heat insulation box and the cooling member. The heat insulation box is cooled by sandwiching at least the inner surface of the inner surfaces.

  Furthermore, preferably, the shape of the cooling member in the method for manufacturing a heat insulating box according to the present invention is the same as the inner shape of the foaming jig when filling and filling the foam heat insulating material.

  Further preferably, the shape of the cooling member in the method for manufacturing a heat insulating box of the present invention includes a shape that sandwiches the outer box plane and the inner box plane from the open side of the inner box of the heat insulating box.

  Further preferably, the structure of the cooling member in the method for manufacturing a heat insulating box of the present invention has a flow path through which the cooling medium flows, and has a cooling device capable of controlling the temperature by circulating the cooling medium.

  Furthermore, preferably, the cooling device in the manufacturing method of the heat insulation box of this invention has several cooling systems which can be divided | segmented for every place and can be adjusted to a different cooling temperature.

  Furthermore, Preferably, the surface temperature of the heat insulation box in the manufacturing method of the heat insulation box of this invention cools to the temperature range of 20-30 degree centigrade.

  Furthermore, Preferably, the surface temperature of the heat insulation box in the manufacturing method of the heat insulation box of this invention cools to the temperature range of 0 to 20 degree Celsius.

  The heat insulating box cooling device of the present invention is provided with a flow path through which a cooling medium flows in the cooling member used in the method for manufacturing the heat insulating box of the present invention, and circulating the cooling medium through the flow path to A cooling device is provided that enables the cooling temperature of the heat insulating box to be controlled by the cooling member, thereby achieving the above object.

  Preferably, in the heat insulating box cooling device of the present invention, the cooling is performed in correspondence with each of a plurality of areas obtained by dividing the surface of the heat insulating box so that the surface temperature of the heat insulating box can be adjusted uniformly. The channel of the member is configured in at least one of different channel systems and different channel densities.

  The heat insulation box of the present invention is manufactured by the method for manufacturing the heat insulation box of the present invention, or is manufactured using the heat insulation box cooling device of the present invention. Achieved.

  With the above configuration, the operation of the present invention will be described below.

  In the present invention, a foaming jig is used to prevent the deformation of the box due to foaming pressure after injecting the foam insulation into the space formed between the outer box and the inner box to produce a heat insulation box The method for manufacturing a heat insulation box has a cooling step of cooling the heat insulation box in contact with the entire surface of the heat insulation box with a cooling member having a temperature lower than the surface temperature of the heat insulation box taken out from the foaming jig. .

  As a result, the heat insulating box is cooled by contacting the entire surface of the heat insulating box with the cooling member having a temperature lower than the surface temperature of the heat insulating box taken out from the foaming jig, so that the heat insulating box is cooled evenly. It is possible to alleviate the influence of the foaming pressure on the box structure, and to manufacture a heat insulating box body with excellent dimensional accuracy without deformation of the outer shape of the heat insulating box body.

  As described above, according to the present invention, since the heat insulating box is cooled by contacting the entire surface of the heat insulating box with the cooling member having a temperature lower than the surface temperature of the heat insulating box taken out from the foaming jig, By reducing the influence on the structure, it is possible to manufacture a heat-insulating box having excellent dimensional accuracy without deformation of the outer shape.

It is a process block diagram for demonstrating each process in the manufacturing method of the heat insulation box in the refrigerator in Embodiment 1 of this invention. It is a perspective view which shows typically the arrangement configuration of the heat insulation box in the refrigerator of FIG. (A)-(c) is a typical example of a principal part structure for demonstrating from carrying in from the foaming jig of the cabinet 3 to carrying in from the foaming jig of the cabinet 3 in the manufacturing method of the heat insulation box of the refrigerator of FIG. FIG. 2A is a longitudinal sectional view, (a) is a longitudinal sectional view of a heat insulation box housed in a foaming jig before injection of the heat insulating material, and (b) is a heat insulation box housed in the foaming jig after the heat insulation material is injected. It is a longitudinal cross-sectional view of a body, (c) is a longitudinal cross-sectional view which shows a mode that a heat insulation box is taken out from a foaming jig. It is a longitudinal cross-sectional view which shows typically the principal part structural example in the heat insulation box cooling device of this Embodiment 1. FIG. It is a longitudinal cross-sectional view which shows typically the example of another principal part structure in the heat insulation box cooling device of this Embodiment 1. It is a longitudinal cross-sectional view which shows typically the example of another principal part structure in the heat insulation box cooling device of this Embodiment 1. FIG. It is a perspective view which shows typically the arrangement structure of the heat insulation box in the conventional refrigerator. (A)-(c) is a longitudinal cross-sectional view for demonstrating the heat insulating material foaming process in the manufacturing method of the heat insulation box of the conventional refrigerator, Comprising: (a) is settled in the foaming jig before heat insulating material injection | pouring. (B) is a cross-sectional view of the heat insulation box housed in the foaming jig after the heat insulating material is injected, and (c) is a vertical cross-sectional view showing a state in which the heat insulation box body is taken out from the foaming jig. is there.

  EMBODIMENT OF THE INVENTION Below, the manufacturing method of the heat insulation box of this invention and Embodiment 1 of the heat insulation box manufactured by this are demonstrated in detail, referring drawings. In addition, each thickness, length, etc. of the structural member in each figure are not limited to the structure to illustrate from a viewpoint on drawing preparation. In addition, Embodiment 1 shown below is an example, and embodiments different from the technical scope shown in the claims are also included in the technical scope of the present invention.

(Embodiment 1)
FIG. 1: is a process block diagram for demonstrating each process in the manufacturing method of the heat insulation box in Embodiment 1 of this invention.

  In FIG. 1, the manufacturing method of the heat insulation box body of this Embodiment 1 is the outer frame bending process S1 processed into a metal outer box, the component attachment process S2 which attaches a predetermined part to an outer box, and resin-made Inner box vacuum forming step S3 for vacuum forming the inner box, component mounting step S4 for attaching a predetermined part to the inner box, and cabinet assembly step S5 for assembling the cabinet by fitting the resin inner box into the metal outer box Component mounting step S6 for attaching predetermined components to the cabinet, cabinet foaming jig loading step S7 for loading the cabinet into the foaming jig, polyurethane / foaming agent injection / foaming step S8, and unloading the cabinet from the foaming jig A cabinet foaming jig unloading step S9 and a cabinet cooling step S10 for cooling the entire surface (outer surface and inner surface) of the cabinet. To produce a heat insulating box body, to complete the refrigerator goes to subsequent assembly after the step S11.

  In the manufacturing method of the heat insulation box body of the first embodiment, foaming after injecting foam heat insulating material into a space formed between the outer box 1 and the inner box 2 described later using the foaming jig 4 described later. A heat insulating box is manufactured while preventing deformation of the box due to pressure. Thereafter, the cooling member 6, 8 or 9 (for example, a cooling mold or the like) is pressed and brought into contact with substantially the entire surface (outer surface and inner surface) of the cabinet 5 of the heat insulation box to cool the cabinet 5 of the heat insulation box.

  In the outer frame bending step S1, as shown in FIG. 2, a U-shaped press-formed product comprising a top plate 1a and side plates 1b, 1c connected to the top plate 1a by bending a coated steel plate, and a separate back plate in front An outer box 1 (outer shell) is formed from 1d and five coated steel plates of a U-shaped open-side bottom plate 1e. The outer box 1 is open on the back side facing the back plate 1d. The outer box 1 is made of a steel plate having a thickness of 0.5 to 1 mm, on which five surfaces are painted. A compressor mounting space 1g is provided at a lower position inside the back plate 1d.

  In the component mounting step S2, a predetermined component is mounted in the outer box.

  In the inner box vacuum forming step S3, the inner box 2 (food liner into which food is put) having a predetermined shape is processed by vacuum forming a resin plate material. Among the resins, ABS resin is preferable in consideration of strength, durability, glossiness, and the like.

  Part attachment process S4 attaches a predetermined part to the inner box.

  In the cabinet assembling step S5, the resin-made inner box 2 is fitted into the metal outer box 1 to assemble the box cabinet 3 before filling with the heat insulating material. At this time, a space for injecting and filling a heat insulating material is formed between the outer box 1 and the inner box 2.

  In the component mounting step S6, a refrigeration cycle component, an electrical component, other mechanical components, and the like are mounted in advance in the space after the inner box 2 is fitted in the outer box 1. Since the box cabinet 3 before filling the heat insulating material at this time is assembled only by fitting the peripheral portions of the outer box 1 and the inner box 2, the wall surfaces of the outer box 1 and the inner box 2 are very flexible. It is in.

  Next, the cabinet foaming jig carrying-in process S7 to the cabinet foaming jig carrying-out process S9 will be described in detail with reference to FIGS. 3 (a) to 3 (c).

  3 (a) to 3 (c) are important points for explaining the carrying-in from the foaming jig of the cabinet 4 to the carrying-out from the foaming jig of the cabinet 4 in the method for manufacturing the heat insulating box of the refrigerator of FIG. FIG. 3A is a vertical cross-sectional view schematically showing an example of a part configuration, and FIG. 3A is a vertical cross-sectional view of a box housed in a foaming jig before injection of a heat insulating material, and FIG. FIG. 3C is a longitudinal cross-sectional view of the heat insulation box housed in the foaming jig, and FIG.

  As shown in FIG. 3A, in the cabinet foaming jig carrying-in step S7, the box cabinet 3 is housed in the foaming jig 4 with the back plate 1d facing upward and the open side facing downward. The upper cover of the foam outer jig 4 is closed, and the outer periphery of the box cabinet 3 is surrounded by the outer jig 4a, and the back plate is inserted through the injection head insertion port 4d of the upper cover as shown in FIG. The heat insulating material injection head 4c is inserted into the injection port 1f opened at 1d.

  That is, the back plate 1d of the box cabinet 3 is turned upward, and the convex inner jig 4b of the foaming jig 4 is inserted into the concave portion on the open side of the cabinet 3 on the opposite side, so that the concave portion on the open side of the cabinet 3 is inserted. The inside is fixed, both sides of the cabinet 3 and the back plate 1d side are sandwiched from outside by the external jig 4a, and the cabinet 3 is confined and fixed inside the external jig 4a and the internal jig 4b.

  In this state, the injection head 4c is inserted into the injection head insertion port 4d on the back plate 1d side of the top surface of the cabinet 3, and from here, the polyurethane and the foaming agent can be injected into the internal space.

  Subsequently, in the polyurethane / foaming agent injection / foaming step S8, as shown in FIG. 3 (a), the foam insulation material solution (polyurethane / foaming agent) is injected into the internal space of the box cabinet 3 from the injection head 4c. To do. Immediately after injecting the foam insulation solution into the internal space, the foam expansion reaction and the resin curing reaction occur in parallel, and the foam flows gradually upward from the space near the bottom of the jig. As shown in FIG. 3 (b), a heat insulating box cabinet 5 in which a space is filled with a heat insulating material without a gap can be formed. At this time, a foaming pressure with a large load is applied to the foaming jig 4 outward.

  In this way, as shown in FIG. 3B, the foamed heat insulating material stock solution (polyurethane / foaming agent) is foamed and cured. At this time, the heat insulating material is filled to every corner in the space of the box cabinet 3 to form the heat insulating box cabinet 5 having strength. At this time, a high foaming pressure due to foaming is applied to the outer box 1 and the inner box 2.

  For this reason, the outer jig 4a surrounding the outer box 1 and the inner jig 4b supporting the inner side of the inner box 2 are fixed to the inner inner side so that the outer box 1 and the inner box 2 are not deformed by foaming pressure. ing. Although the fixed time is about 5 minutes here, for example, the volume expansion due to the foam expansion reaction and the resin curing reaction is gradually stabilized with time, and the foam pressure gradually decreases. The injection head 4c is removed from the injection head insertion port 4d.

  In the cabinet foaming jig unloading step S9, the cabinet 5 of the heat insulating box is taken out from the foaming jig 4 in a time when the volume expansion is stabilized and the dimensions are stabilized.

  The cabinet 5 of the heat insulating box when taken out from the foaming jig 4 is warmed by the foaming reaction heat, and the surface temperature is in a state of about 40 to 50 degrees Celsius. Moreover, the temperature inside the heat insulating material of the cabinet 5 of the heat insulating box is higher, and in some cases, reaction heat of 100 degrees Celsius or more may remain accumulated. This becomes an intrinsic energy for deforming the outer box 1 and the inner box 2 by further volume expansion, and it is necessary to remove this reaction heat in order to completely suppress the dimensional variation.

  When the change in temperature and the change in foaming pressure at each position of the foaming jig 4 with respect to the elapsed time from the start of the foam expansion reaction is measured, the temperature of the outer surface and the inner surface of the cabinet 5 increases by a few degrees from the start of the foam expansion reaction This temperature is not easily lowered by the temperature supply from the inside, and the foaming expansion reaction is not completely completed in about 5 to 10 minutes. At this time, in the state where internal heat generation due to the foaming reaction of polyurethane continues, the temperature is still around 100 degrees Celsius near the polyurethane inner center.

  Usually, after about 5 to 10 minutes, the cabinet 5 of the heat insulation box is taken out from the foaming jig 4, but even at that time, the internal temperature of the polyurethane / foaming agent is 100 degrees Celsius and the foam expansion reaction is stopped. The box structure is affected by the foaming pressure.

  On the other hand, the boiling point of the foaming agent cyclopentane in the polyurethane / foaming agent stock solution of foaming heat insulation is 49 degrees Celsius, and the outer surface temperature (2) or the inner surface temperature (5) of the cabinet 5 of the heat insulation box. Is 40 degrees Celsius or more, the foam expansion reaction proceeds sufficiently inside the foaming jig 4.

  Further, if the outer surface temperature (2) or the inner surface temperature (5) of the cabinet 5 of the heat insulating box is 30 to 40 degrees Celsius, the foam expansion reaction is considerably slowed inside the foaming jig 4. Furthermore, when the outer surface temperature (2) or the inner surface temperature (5) of the cabinet 5 of the heat insulation box is less than 30 degrees Celsius, it becomes difficult to foam.

  Therefore, if the outer surface temperature (2) or the inner surface temperature (5) of the heat insulation box cabinet 5 is 20 to 30 degrees Celsius, the foam expansion reaction inside the heat insulation box cabinet 5 hardly occurs. In order to prevent the foam expansion reaction from proceeding more stably inside the cabinet 5, the outer surface temperature (2) or the inner surface temperature (5) of the cabinet 5 of the heat insulation box is preferably in the range of 0 to 20 degrees Celsius. If it is within, it will be good. In addition, it is not preferable because dew condensation occurs when the outer surface temperature (2) or the inner surface temperature (5) of the cabinet 5 of the heat insulation box is 0 degrees Celsius or less.

  Therefore, following the step of taking out the cabinet 5 of the heat insulation box from the foaming jig 4, each surface of the outer surface of the cabinet 5 of the heat insulation box and the inner surface recessed in a concave shape is sandwiched by a cooling member having a heat radiation effect to dissipate heat. In this manner, the cooling body is pressed to promote cooling of the cabinet 5.

  In the cabinet cooling step S10, as described above, the box body is deformed by the foaming pressure after the foam insulation material is injected into the space formed between the outer box 1 and the inner box 2 using the foaming jig 4. In the heat insulating box manufacturing method according to the first embodiment for manufacturing the heat insulating box while preventing the above, the cooling members 6 and 8 described later having a temperature lower than the surface temperature of the cabinet 5 of the heat insulating box taken out from the foaming jig 4. Alternatively, 9 (for example, a cooling mold or the like) is pressed and brought into contact with substantially the entire surface (outer surface and inner surface) of the cabinet 5 of the heat insulation box to cool the cabinet 5 of the heat insulation box.

  In this case, the cabinet cooling step S10 sandwiches the outside from the outer surface side of the cabinet 5 of the heat insulation box body and the inner surface side of the cabinet 5 of the heat insulation box body by the cooling members 6, 8 or 9 described later. The outer surface and inner surface of the cabinet 5 of the heat insulation box are pressed and cooled. The cabinet cooling step S10 will be described with reference to FIGS.

  FIG. 4 is a longitudinal cross-sectional view schematically showing an example of the configuration of the main part in the heat insulating box cooling device of the first embodiment.

  In FIG. 4, the cooling member 6 has a shape that surrounds the entire cabinet 5 of the heat insulating box.

  As shown in FIG. 4, the shape of the cooling member 6 may be such that the side surface of the outer box 1 and the side surface of the inner box 2 are sandwiched from the open side of the inner box 2 of the cabinet 5 of the heat insulating box body. In short, the cooling member 6 includes the cooling upper member 6a that is in contact with the outer surface of the back plate 1d of the outer box 1 in the cabinet 5 of the heat insulating box, and the side plates 1b and 1c, the top plate 1a, and the bottom plate 1e of the outer box 1. The cooling lower member 6b that is in contact with the outer surface (outer surface) and in contact with the inner surface (inner surface) of the back plate, the side plates, the top plate, and the bottom plate of the inner box 2, and the cabinet 5 up and down It is inserted along the surface shape to dissipate heat.

  In this case, the lower cooling member in contact with each inner surface (inner surface) of the back plate, both side plates, top plate and bottom plate of the inner box 2 so that the surface temperature of the cabinet 5 of the heat insulation box can be adjusted uniformly. The flow path system or the flow path density of a part of the predetermined area 6b (only the recess surface area) is supplied from the cooling device 7 as compared with the flow path system and the flow path density of the other cooling lower members 6a and 6b. The temperature of the cooling water in the flow path system is lowered or / and the flow path density is increased.

  FIG. 5 is a longitudinal cross-sectional view schematically showing another configuration example of the main part of the heat insulating box cooling device of the first embodiment.

  As shown in FIG. 5, the shape of the cooling member 8 is preferably the same shape along the inner shape of the foaming jig 4 used in foaming injection because the dimensions can be maintained as they are. The cooling member 8 has one of the six surfaces in the box of the cabinet 5 in an open state, covers the outside of the five surfaces of the box other than the open state, and covers the five surfaces inside from the open surface. It is configured to cover. The cooling member 8 cools from each surface in contact with each surface of the cabinet 5 of the heat insulating box while suppressing dimensional fluctuation during cooling. In short, the cooling member 8 includes the cooling upper member 8a in contact with the outer surfaces of the back plate 1d, the side plates 1b and 1c, the top plate 1a and the bottom plate 1e of the outer box 1 in the cabinet 5 of the heat insulating box, and the inner box 2 The cooling lower member 8b in contact with the inner surfaces of the back plate, both side plates, the top plate and the bottom plate is sandwiched up and down along the surface shape to cool the cooling member 8 with heat from the cabinet 5. Heat is radiated to the upper member 8a and the cooling lower member 8b.

  In this case, the flow path system or flow path density of the predetermined area (recess surface area) of the cooling lower member 8b is set to other cooling lower members so that the surface temperature of the cabinet 5 of the heat insulation box can be adjusted uniformly. Compared with the flow path system and the flow path density of 8a, the temperature of the cooling water of the flow path system supplied from the cooling device 7 is lowered or / and the flow path density is made higher.

  FIG. 6 is a longitudinal sectional view schematically showing still another main configuration example in the heat insulating box cooling apparatus of the first embodiment.

  As shown in FIG. 6, the shape of the cooling member 9 is from the entire inner surface on the open side of the inner box 2 of the cabinet 5 of the heat insulating box body to the entire half of the side surfaces 1 b and 1 c, the top plate 1 a and the bottom plate 1 e of the outer box 1. The outer surface of the outer casing 1 and the outer surface of the rear surface 1d from the remaining half of the side surfaces 1b, 1c, the top plate 1a and the bottom plate 1e of the outer box 1 are sandwiched up and down along the surface shape to heat from the cabinet 5 Is radiated to the cooling upper member 9a and the cooling lower member 9b of the cooling member 9, respectively.

  In this case, the lower cooling member in contact with each inner surface (inner surface) of the back plate, both side plates, top plate and bottom plate of the inner box 2 so that the surface temperature of the cabinet 5 of the heat insulation box can be adjusted uniformly. The flow path supplied from the cooling device 7 is compared with the flow path system or flow path density of a part of the predetermined area 9b (only the recess surface area) compared to the flow path system and flow path density of the other cooling lower member 9b. The cooling water temperature of the system is lowered or / and the flow path density is set high.

  Therefore, as shown in FIGS. 4 to 6, the cooling members 6, 8, and 9 allow part or all of the outer surface (outer surface) of the cabinet 5 of the heat insulation box and the outer surface of the cabinet 5 of the heat insulation box to be used. The cabinet 5 of the heat insulation box is cooled by sandwiching at least the inner surface of the remaining part and the inner surface (inner surface).

  As a cooling method of the cooling members 6, 8, and 9, a structure in which a cooling medium such as cold water flows is drawn inside each of the cooling members 6, 8, and 9. A cooling device 7 is provided for flowing a cooling medium such as cold water through the pipes inside the cooling members 6, 8 and 9.

  The cooling device 7 circulates a cooling medium such as cold water along the inside of the pipe to cool each of the cooling members 6, 8, and 9 and control the temperature. A plurality of cooling systems and pipes having different densities may be used so that the degree of cooling can be adjusted for each place such as a deep place in the cabinet 5.

  That is, the entire surface of the heat insulation box cabinet 5 is divided into a plurality of areas (for example, the outer surface and the inner surface, or the inner surface is also the outer surface so that the entire surface temperature of the heat insulation box cabinet 5 can be adjusted uniformly. 4 and FIG. 6, the heat insulating box cooling device shown in FIGS. 4 to 6 is provided in at least one of a flow path system and a different flow path density of the cooling members 6, 8, and 9. Is configured.

  In this case, different flow path systems adjust the temperature of the cooling water to be circulated. The different flow path densities differ in the absorption efficiency of the temperature from the surface of the cabinet 5 of the heat insulation box. In any case, the overall surface temperature of the cabinet 5 of the heat insulating box can be adjusted to be uniform. Furthermore, different flow path systems and different flow path densities can be used in combination.

  Further, the cooling device 7 cools the water that has returned through circulation and returns it to the piping inside each of the cooling members 6, 8, and 9. As a result, the cabinet 5 can be cooled with higher dimensional accuracy.

  The degree of cooling by the cooling members 6, 8, and 9 varies depending on the capacity of the cabinet 5 of the heat insulating box body, the thickness of the heat insulating material, and the like, and thus cannot be simply determined. As the first embodiment, the cooling members 6, 8 and 9 are controlled in the surface temperature range of 0 to 20 degrees Celsius as described above, and are cooled at least until the surface temperature becomes 20 to 30 degrees Celsius. By doing so, the reaction heat accumulated inside can be dissipated, and subsequent dimensional variations can be greatly suppressed.

  That is, as shown in FIGS. 4 to 6, the heat insulation box cooling device of the first embodiment has cold water or the like inside the cooling members 6, 8, and 9 of the heat insulation box cooling device used in the method for manufacturing the heat insulation box. Is provided with a flow path (pipe line) through which the cooling medium flows, and the cooling medium such as cold water is circulated through the flow path (pipe line) so that the cooling temperature of the cabinet 5 of the heat insulation box can be controlled by the cooling members 6, 8 and 9. A cooling device 7 is provided.

  In this case, the surface of the cabinet 5 of the heat insulation box is divided into a plurality of areas so that the surface temperature of the cabinet 5 of the heat insulation box can be adjusted uniformly. The flow paths are configured in at least one of different flow path systems and different flow path densities. As described above, the heat insulation box cabinet 5 according to the first embodiment is manufactured by the method for manufacturing the heat insulation box cabinet 5 according to the first embodiment, or the heat insulation box cooling device according to the first embodiment. Manufactured using.

  As described above, according to the first embodiment, in order to eliminate the dimensional fluctuation of the cabinet 5 after the cabinet 5 of the heat insulating box is taken out from the foaming jig 4, it is necessary to sufficiently release the reaction heat inside the heat insulating material. However, in order to completely cool the cabinet 5 of the heat insulation box by natural cooling, it is necessary to leave it for a long time in a state of being hardened by the foaming jig 4. Moreover, when it takes out from the foaming jig 4 and forcedly cools, foaming bubble shrinkage | contraction by cooling will occur, and if the degree of cooling is uneven for every place, it will cause a box-shaped deformation.

  On the other hand, in the manufacturing method of the heat insulation box of this Embodiment 1, after injecting a foam heat insulating material into the space formed between the outer box 1 and the inner box 2 using the foaming jig 4 In the heat insulating box manufacturing method for manufacturing the heat insulating box cabinet 5 by preventing the deformation of the box due to the foaming pressure, the cooling is lower than the surface temperature of the heat insulating box cabinet 5 taken out from the foaming jig 4. There is a cooling step of cooling the heat insulation box cabinet 5 in contact with the entire surface of the heat insulation box cabinet 5 on the surface of the member 6, 8 or 9. This cooling step is performed by the cooling members 6, 8, or 9, and a part or all of the outer surface of the cabinet 5 of the heat insulation box body and at least one of the remaining part and the inner surface of the outer surface of the cabinet 5 of the heat insulation box body. The cabinet 5 of the heat insulation box is cooled by sandwiching the inner surface with the upper and lower sides.

  That is, in the manufacturing method of the cabinet 5 of the heat insulation box formed by injecting the foam heat insulating material into the space formed between the outer box 1 and the inner box 2, the cabinet 5 of the heat insulation box is attached to the foaming jig 4. After being taken out from the space, the space filled with the foam insulation material of the cabinet 5 of the heat insulation box 5 is sandwiched between members with a temperature lower than the surface temperature of the cabinet 5 of the heat insulation box 5 By cooling in a state in which the shape is fixed in accordance with the dimensions, the reaction heat remaining inside the heat insulating material can be taken without causing the shape deformation of the cabinet 5 due to the shrinkage of the foam bubbles. This makes it possible to obtain a heat-insulated cabinet 5 having no dimensional variation in a shorter time than before.

  Thus, in order to cool the cabinet 5 of the heat insulation box body in contact with the entire surface of the cabinet 5 of the heat insulation box body with a cooling member lower than the surface temperature of the cabinet 5 of the heat insulation box body taken out from the foaming jig 4, By reducing the influence of the foaming pressure on the box structure, it is possible to manufacture a cabinet 5 of a heat insulating box having excellent dimensional accuracy without deformation of the outer shape.

  In the first embodiment, a flow path (pipe) through which a cooling medium such as cold water flows is provided inside the cooling member 6, 8 or 9 of the heat insulating box cooling device used in the method for manufacturing a heat insulating box. Although the case where the cooling device 7 in which the cooling medium such as cold water is circulated in the passage and the cooling temperature control of the cabinet 5 of the heat insulating box body by the cooling member is provided has been described, the present invention is not limited thereto, and the outer surface of the cooling member and Heat dissipation may be promoted by applying a heat dissipation sheet or applying a heat dissipation paint on the inner surface.

  Thus, heat is not heat-treated on the cabinet, but heat is heat-treated on the cooling member side, so that heat is efficiently transmitted from the cabinet surface to the cooling member side via the heat-dissipating sheet on the cooling member side.

  Alternatively, a flow path (pipe) through which a cooling medium such as cold water flows is provided inside the cooling member 6, 8 or 9 of the heat insulating box cooling device used in the method for manufacturing the heat insulating box body. In the case of the first embodiment in which the cooling device 7 is provided in which the cooling medium 7 is configured such that the cooling temperature can be controlled by the cooling member by circulating the cooling medium, the heat-dissipating sheet is pasted on the outer surface and the inner surface of the cooling member. A case of promoting heat dissipation by applying a heat dissipating paint may be used in combination.

  Examples of the material for the heat radiation sheet and the heat radiation paint include silicon material and graphite material. Moreover, a cold insulating material can also be used as a cooling member.

  That is, a heat insulating box body using the cooling member 6, 8 or 9 of the heat insulating box cooling device in a state where heat radiation sheets are applied to the outer surface and inner surface of the cooling member or heat radiation paint is applied to promote heat radiation. The temperature is efficiently radiated from the entire surface of the cabinet 5 to cool it quickly.

  Thus, the heat insulation box manufactured by cooling with the cabinet 5 of the heat insulation box manufactured by the manufacturing method of the heat insulation box of this Embodiment 1, and the heat insulation box cooling device of FIGS. 4-6. The body cabinet 5 is manufactured with little deformation and high dimensional accuracy, and less adjustment in the post-assembly process.

  As mentioned above, although this invention has been illustrated using preferable Embodiment 1 of this invention, this invention should not be limited and limited to this Embodiment 1. It is understood that the scope of the present invention should be construed only by the claims. It is understood that those skilled in the art can implement an equivalent range from the description of the specific preferred embodiment 1 of the present invention based on the description of the present invention and the common general technical knowledge. Patents, patent applications, and documents cited herein should be incorporated by reference in their entirety, as if the contents themselves were specifically described herein. Understood.

  INDUSTRIAL APPLICABILITY The present invention is used in, for example, a refrigerator and the like, and a method for manufacturing a heat insulating box body in which a foam heat insulating material is injected into a space formed between an outer box and an inner box to form a heat insulating box body, and is used for this. In the field of the heat insulation box body manufactured by the heat insulation box body cooling device and the method for producing the heat insulation box body, the entire surface of the heat insulation box body is cooled with a cooling member lower than the surface temperature of the heat insulation box body taken out from the foaming jig. Since the heat insulating box is contacted and cooled, the influence of the foaming pressure on the box structure can be mitigated, and a heat insulating box having excellent dimensional accuracy can be manufactured without deformation of the outer shape.

DESCRIPTION OF SYMBOLS 1 Outer box 1a Top plate 1b, 1c Side plate 1d Back plate 1e Bottom plate 1f Injection port opened in back plate 1d 1g Compressor installation space 2 Inner box 3 Box cabinet 4 Foaming jig 4a Outer jig 4b Inner jig 4c Injection head 4d Injection head insertion port 5 Cabinet of heat insulation box 6, 8, 9 Cooling member 6a, 8a, 9a Cooling upper member 6b, 8b, 9b Cooling lower member 7 Cooling device

Claims (5)

Using a foaming jig to prevent deformation of the box due to foaming pressure after injecting foam insulation into the space formed between the outer box and the inner box, and forming a heat insulation box;
And a cooling step in which a cooling member having a temperature lower than the surface temperature of the heat insulation box taken out from the foaming jig is in contact with the entire surface of the heat insulation box to cool the heat insulation box.   In the cooling process, the cooling member sandwiches a part or all of the outer surface of the heat insulating box and the remaining part of the outer surface of the heat insulating box and at least the inner surface of the inner surface. The manufacturing method of the heat insulation box of Claim 1 which cools a box.   A flow path through which a cooling medium flows is provided inside the cooling member used in the method for manufacturing a heat insulating box according to claim 1 or 2, and the cooling medium is circulated through the flow path to cool the heat insulating box. A heat insulating box cooling device provided with a cooling device capable of controlling the cooling temperature by a member.   Corresponding to each of a plurality of areas obtained by dividing the surface of the heat insulation box so that the surface temperature of the heat insulation box can be adjusted uniformly, the flow paths of the cooling member have different flow path systems and different flow path densities. The heat insulation box body cooling device according to claim 3 comprised in at least any of them.   The heat insulation box manufactured by the manufacturing method of the heat insulation box of Claim 1 or 2, or manufactured using the heat insulation box cooling device of Claim 3 or 4.