JP2015042915A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator for improving a heat insulation effect by increasing coverage of a vacuum heat insulation material, and optimally providing a heat radiation pipe and improving workability at the same time.SOLUTION: The refrigerator comprises a heat radiation pipe side 18S arranged inside an outer case of a heat insulation box, and a vacuum heat insulation material 21 arranged on an interior side of the heat radiation pipe side. The vacuum heat insulation material 21 has plural recess lateral grooves 22b in forward and backward directions, and is constituted so that width dimension of the lowermost lateral groove 22b has maximum width dimension. Thereby, the vacuum heat insulation material is sized to cover a bending part 18S-1 of a heat radiation pipe, so that coverage of the vacuum heat insulation material can be significantly increased to provide a refrigerator with a high heat insulation property. Also, by maximizing the width dimension of the lowermost lateral groove, pipes can be collectively arranged at a lower part at which it is easy to weld or connect the pipes. The heat radiation pipe can be optimally installed, so as to improve workability for connecting the pipes and the like.

Description

  The present invention relates to a refrigerator using a vacuum heat insulating material.

  In recent years, there has been an active movement to promote energy conservation as a countermeasure against global warming, which is a global environmental problem. With regard to equipment that uses heat and cold energy, a vacuum insulation material with excellent heat insulation performance from the viewpoint of effective use of heat. Is spreading.

  Vacuum insulation is a bag-like gas barrier film that contains a core material with a high gas phase volume ratio and a fine gap, such as glass wool, and the core material storage space is decompressed and sealed. It is a thing.

  The vacuum heat insulating material has a low thermal conductivity and is applied to the wall surface of the refrigerator. In recent years, it tends to increase the thickness particularly in order to increase the effect. In addition, in order to efficiently dissipate the heat generated in the refrigerator's refrigeration cycle, a heat-dissipating pipe is attached to the inside of the outer box that forms the outer surface of the refrigerator, and this heat-dissipating pipe is covered with a vacuum heat insulating material. A heat insulating material is filled between the inner box forming the interior space of the refrigerator and the outer box so that the heat outside the refrigerator is hardly transmitted to the inside of the refrigerator.

  However, simply placing a flat vacuum heat insulating material on the heat radiating pipe creates a space surrounded by the outer box of the refrigerator, the heat radiating pipe and the vacuum heat insulating material, which makes it impossible to fill urethane foam. By overlapping the heat radiating pipe and the vacuum heat insulating material, the space between the inner box and the outer box of the refrigerator, that is, for the refrigerator, the wall thickness increases, and the internal volume must be reduced.

  Therefore, in order to solve the above-described problem, it has been proposed to provide a groove for fitting a heat radiating pipe in the vacuum heat insulating material (see, for example, Patent Document 1).

  12 is a horizontal sectional view of a side wall of a heat-insulating box of a conventional refrigerator disclosed in Patent Document 1, and FIG. 13 is an exploded perspective view of the side wall portion. 12 and 13, 101 is an outer box of the heat insulating box 102, 103 is the inner box, 104 is a foam heat insulating material filled and foamed between the outer box 101 and the inner box 103, and 105 is an inner side of the outer box 101. A heat radiating pipe 106 is a vacuum heat insulating material covering the heat radiating pipe 105, and a concave groove 107 into which the heat radiating pipe 105 is fitted is provided on the heat radiating pipe 105 side.

JP 2005-90810 A

  According to the conventional configuration described in Patent Document 1, since the heat radiating pipe 105 is located in the groove 107 of the vacuum heat insulating material 106, the wall thickness is increased by overlapping the heat radiating pipe 105 and the vacuum heat insulating material 106. This eliminates the problem and makes it possible to secure the internal volume, and at the same time, there is an advantage that the heat insulating property of the heat insulating box 102 is improved.

However, in the refrigerator using the conventional vacuum heat insulating material 106, there is still room for improvement in how to use the vacuum heat insulating material 106, particularly in improving the coverage of the vacuum heat insulating material.

  The present invention has been made in view of such points, and aims to provide a refrigerator that improves the heat insulation effect by increasing the coverage of the vacuum heat insulating material and at the same time optimizes the installation of the heat radiating pipe and improves the workability. It is a thing.

  In order to solve the above-described conventional problems, the refrigerator of the present invention includes a heat insulating box body filled with a foam heat insulating material between an outer box and an inner box, a heat radiating pipe disposed inside the outer box, A vacuum heat insulating material provided on the inner side of the heat radiating pipe, and the vacuum heat insulating material has a plurality of concave horizontal grooves in the front-rear direction, and the width dimension of the lowermost horizontal groove is maximized.

  As a result, the folded portion of the heat radiating pipe can be fitted into the lateral groove of the vacuum heat insulating material to prevent the refrigerator wall thickness from becoming thick, and the vacuum heat insulating material can be made large enough to cover the folded portion of the heat radiating pipe. Thus, while the heat radiation from the heat radiating pipe to the inside of the cabinet is reliably insulated with the vacuum heat insulating material, the coverage of the vacuum heat insulating material can be dramatically increased, and a refrigerator with high heat insulating properties can be obtained. In addition, by maximizing the width dimension of the horizontal groove at the bottom, the pipes can be concentrated and placed in the lower part where work such as pipe connection is easy, so that heat radiation pipes can be optimally installed and workability such as pipe connection is also possible Can be improved.

  With the above configuration, the present invention can improve the heat insulating property by increasing the coverage of the vacuum heat insulating material while securing the internal volume, and can also optimally install the heat radiating pipe and have a high workability such as pipe connection. Can be provided.

Front view of the refrigerator according to Embodiment 1 of the present invention Schematic side sectional view explaining the refrigerator according to the first embodiment The perspective view explaining the position of the heat radiating pipe of the refrigerator according to the first embodiment Explanatory drawing which shows the relationship between the outer case side surface of the refrigerator by the same Embodiment 1, and a heat radiating pipe Simplified enlarged cross-sectional view of part D in FIG. Front view of the vacuum heat insulating material used for the refrigerator according to the first embodiment Schematic side sectional view explaining the refrigerator according to the first embodiment AA sectional view of FIG. BB sectional view of FIG. 6 The front view of the vacuum heat insulating material used for the refrigerator by Embodiment 2 of this invention The front view of the vacuum heat insulating material used for the refrigerator by Embodiment 3 of this invention Side wall horizontal sectional view of a conventional heat insulation box of a refrigerator The exploded perspective view of the heat insulation box of the conventional refrigerator

  1st invention was provided in the heat insulation box body which filled the foam heat insulating material between the outer box and the inner box, the heat radiating pipe arrange | positioned inside the said outer box, and the warehouse inner side of the said heat radiating pipe A vacuum heat insulating material, wherein the vacuum heat insulating material has a plurality of concave lateral grooves in the front-rear direction, and the width dimension of the lowermost horizontal groove is maximized.

Thereby, it can suppress that the refrigerator wall thickness becomes thick by fitting the folding | returning part of a heat radiating pipe in a horizontal groove, and covering with a vacuum heat insulating material, and also make a vacuum heat insulating material the size which only covers the folding | turning part of a heat radiating pipe. The heat insulation from the heat radiating pipe to the inside of the cabinet can be reliably insulated with the vacuum heat insulating material, and the coverage of the vacuum heat insulating material can be dramatically increased, so that a refrigerator with high heat insulating property can be obtained. . In addition, by maximizing the width dimension of the horizontal groove at the bottom, the pipes can be concentrated and placed in the lower part where work such as pipe connection is easy, so that heat radiation pipes can be optimally installed and workability such as pipe connection is also possible Can be improved.

  According to a second invention, in the first invention, a plurality of heat radiating pipes are arranged in the lowermost lateral groove, whereby the heat radiating pipes can be optimally installed.

  Hereinafter, embodiments of a refrigerator using a vacuum heat insulating material according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a front view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a schematic side sectional view illustrating the refrigerator according to Embodiment 1, and FIG. FIG. 4 is an explanatory view showing the relationship between the side surface of the outer box of the refrigerator and the heat radiating pipe according to the first embodiment, FIG. 5 is a simplified enlarged sectional view of a portion D in FIG. 4, and FIG. FIG. 7 is a schematic side cross-sectional view for explaining the refrigerator according to the first embodiment, FIG. 8 is a cross-sectional view taken along the line AA of FIG. 6, and FIG. It is BB sectional drawing of.

  1 to 5, the refrigerator includes a heat insulating box 1 that opens forward and a door 2 that opens and closes a storage chamber in the heat insulating box 1. The heat insulation box 1 is composed of a metal outer box 3, a hard resin inner box 4, and a foam heat insulating material 5 that is foam-filled between the outer box 3 and the inner box 4. 3 has a reinforcing member 6 for improving the strength as shown in FIG. The reinforcing member 6 is formed to rise from the bottom surface of the outer box 3 to the back surface, and a space 7 communicating with the outside air is provided between the reinforcing member 6 and the outer box 3.

  The storage room formed in the heat insulation box 1 is provided beside the refrigerating room 8 provided in the upper part, the switching room 9 provided under the refrigerating room 8 and capable of switching the temperature zone, and the switching room 9. The ice making room 10, the switching room 9, and the freezing room 12 provided between the ice making room 10 and the vegetable room 11.

  There is a cooling chamber 14 on the back of the freezer compartment 12, which has a cooler 15 that generates cool air and a cool air blower fan 16 that supplies the cool air to each chamber, and a temperature detection sensor (not shown) in the refrigerator The internal temperature is controlled by a damper or the like (not shown). A defrosting unit is installed below the cooler 15.

  The cooler 15 constitutes a refrigeration cycle in which a compressor 17, a condenser (not shown), a heat radiating pipe 18, and a capillary tube 19 are connected in an annular shape, and are compressed by the compressor 17. Cooling is performed by circulation of the cooled refrigerant.

  As shown in FIG. 3, the heat radiating pipe 18 is disposed in the heat insulating box 1, and the heat radiating pipe side 18S disposed on the side surface and the back surface radiates heat by bending one pipe into, for example, a U shape. The length is secured and the outer box 3 is affixed using aluminum tape or the like. Similarly, a heat radiating pipe front 18F is also bent and laid on the front surface of the partition plate 20 that partitions the storage chambers of the heat insulating box 1 in a U shape. The heat radiating pipe front 18F is connected to the machine room 13 through the partition plate 20 of each storage room.

  A vacuum heat insulating material 21 is attached to the outer box 3 so as to cover the heat radiating pipe 18 in order to further improve the heat insulating property of the heat insulating box 1. This vacuum heat insulating material 21 is formed by covering a core material with a gas barrier film and reducing the pressure inside to seal it. For example, a vacuum heat insulating material having a structure as described in JP 2011-89740 A is used. ing.

  A groove 22 is formed in the vacuum heat insulating material 21 as shown in FIG. 6, and a heat radiating pipe 18 is installed in the groove 22.

  The concave groove 22 provided in the side vacuum heat insulating material 21 is composed of a vertical groove 22a, a horizontal groove 22b, and an outlet groove 22c, and the heat radiating pipe side 18S is arranged in a meandering manner.

  The vertical groove 22a is a groove formed up to the upper and lower end surfaces 23 of the vacuum heat insulating material 21 along the longitudinal direction of the vacuum heat insulating material 21 (that is, the vertical direction of the refrigerator), and the plurality of vertical grooves 22a are arranged in parallel to each other. It is installed.

  The horizontal grooves 22b are concave grooves extending along the short direction of the vacuum heat insulating material 21 (that is, the front-rear direction of the refrigerator), and are formed one by one in the vertical direction of the vertical grooves 22a and are formed so as to intersect each other. Yes. The lower lateral groove 22b is formed wider than the upper lateral groove 22b, and is disposed at least below the upper end of the bottom partition wall (not shown) of the refrigerator.

  The outlet groove 22c is a groove formed from the upper end surface portion 23 of the vacuum heat insulating material 21 to the horizontal groove 22b, and in this embodiment, a plurality of outlet grooves 22c are formed in a straight line with the vertical groove 22a.

  In the upper and lower lateral grooves 22b, there are disposed folded portions 18S-1 bent at the upper and lower ends of the heat radiating pipe side 18S.

  In either one of the upper and lower groove portions of the horizontal groove 22b (in this embodiment, the lower horizontal groove 22b), at least one of the heat radiating pipe side 18S or the heat radiating pipe front 18F is a refrigerant pipe (not shown) from the condenser. It is connected to.

  The heat radiating pipe side 18S passes through the lateral groove 22b on the lower side of the vacuum heat insulating material 21, the straight line portion is disposed in the longitudinal groove 22a, the folded portion 18S-1 is disposed in the lateral groove 22b, and is disposed in a meandering state. After that, it is bent toward the outlet groove 22c formed in the upper part of the lateral groove 22b, and is arranged on the other surface of the outer box 3 through the outlet groove 22c, that is, the ceiling surface of the outer box 3 in this embodiment. Thus, almost the entire heat radiating pipe side 18 </ b> S meandering up and down is disposed between the vacuum heat insulating material 21 and the outer box side plate without jumping out from the upper and lower end surface portions 23 of the vacuum heat insulating material 21. In other words, since the vacuum heat insulating material 21 is provided with the lateral groove 22b, the upper and lower end portions thereof are positioned beyond the upper and lower bent portions of the heat radiating pipe side 18S to the vicinity of the upper and lower ends of the outer casing 3, and are indicated by dotted lines in FIG. As shown, the outer box 3 covers almost the entire upper and lower sides.

  In addition, the groove | channel formed in the said vacuum heat insulating material is formed by either a roller system or a press system. In the case of the press method, a die is required, which increases costs and reduces the degree of freedom in forming grooves. On the other hand, the roller method can form grooves on a straight line, but it is difficult to form complicated grooves. Therefore, the roller method or the press method may be selected depending on the groove shape.

  Moreover, the vacuum heat insulating material 21 affixed to the left and right of the outer box 3 avoids the reinforcing member 6 formed so as to rise from the bottom surface of the outer box 3 to the back as shown in FIGS. A chamfered portion 25 is provided, and the width of the chamfered portion 25 is formed to the full width of the lateral direction of the outer box side surface (that is, the front-rear direction of the refrigerator).

  In addition, the reinforcing member 6 is also formed with a reinforcing member chamfered portion 26 corresponding to the chamfered portion 25 on the vacuum heat insulating material 21 side, and does not overlap the vacuum heat insulating material 21. The area of the chamfered portion 25 of the vacuum heat insulating material 21 is reduced, that is, the reduction of the vacuum heat insulating material area which is reduced by the chamfered portion 25 is reduced.

  Further, in this embodiment, one of the upper and lower horizontal grooves 22b of the vacuum heat insulating material 21 disposed on the left and right sides of the outer box 3, or the lower horizontal groove 22b in this embodiment has a communication member 27 as shown in FIG. One end is arranged. The other end of the communication member 27 is inserted into a hole 28 of the reinforcing member 6 formed so as to rise from the bottom surface of the outer box 3 to the back surface, and communicates with the space 7 formed between the reinforcing member 6 and the outer box 3. The air in the lateral groove is released to the outside air.

  In addition, the end portion of the heat radiating pipe side 18S is drawn out from the lower lateral groove 22b. In this embodiment, the pipe end portion 18T of the heat radiating pipe side 18S is vacuum insulated as shown in FIGS. The chamfered portion 25 portion of the material 21 is bent at least twice or more, and the turn portions 18T-1 and 18T-2 are drawn out at two or more locations.

  In addition, the chamfered portions 25 before and after the lower portion of the vacuum heat insulating material 21 are set to have a larger chamfer on the back surface (pipe end portion 18T storage side) than the front surface. Correspondingly, the height of the rising portion on the back surface from the bottom surface of the reinforcing member 6 is set higher than the height of the rising portion on the front surface.

  The reinforcing member 6 is arranged in a U-shape from the front part of the outer box side surface along the bottom part and the rear part, and the upper ends of the front part and the rear part of the reinforcing member 6 located on the outer box side surface are reinforced. The member chamfered portion 26 is formed.

  Further, the lower lateral groove 22 b provided in the vacuum heat insulating material 21 is formed including the chamfered portion 25.

  Further, the lower lateral groove 22 b provided in the vacuum heat insulating material 21 is formed below the upper ends of the front and rear portions of the reinforcing member 6.

  The groove width of the horizontal groove 22b is set wider than the groove width of the vertical groove 22a.

  Of the horizontal grooves 22b provided above and below, the width of the lower horizontal groove 22b is set larger than that of the upper horizontal groove 22b.

  About the refrigerator comprised as mentioned above, the following operation | movement and an effect | action are demonstrated.

  First, the cooling operation of the refrigerator will be described. When the internal temperature rises and a freezer sensor (not shown) reaches or exceeds the starting temperature, the compressor 17 is started and cooling is started. While the high-temperature and high-pressure refrigerant discharged from the compressor 17 finally reaches the dryer (not shown) disposed in the machine room 13, the outer casing particularly in the heat radiating pipe side 18S installed in the outer casing 3. 3 is cooled and liquefied by heat exchange with the air outside 3 and the foamed heat insulating material 5 in the cabinet.

  Next, the liquefied refrigerant is decompressed by the capillary tube 19, flows into the cooler 15, and exchanges heat with the internal air around the cooler 15. The cold air that has undergone heat exchange is blown into the cabinet by the nearby cool air blower fan 16 to cool the inside of the cabinet. Thereafter, the refrigerant is heated and gasified, and returns to the compressor 17. When the inside of the refrigerator is cooled and the temperature of the freezer compartment sensor (not shown) falls below the stop temperature, the operation of the compressor 17 is stopped.

  Next, the heat insulation effect of the refrigerator and the vacuum heat insulating material 21 attached to the refrigerator will be described.

In the refrigerator of the present embodiment, the plate-like vacuum heat insulating material 21 is provided with the longitudinal grooves 22a and the transverse grooves 22b in the short direction, the straight grooves of the heat radiating pipe side 18S are disposed in the longitudinal grooves 22a, and the transverse grooves 22b. Since the upper and lower folded portions 18s-1 of the heat radiating pipe side 18S are positioned to cover the entire area of the heat radiating pipe side 18S, the coverage of the vacuum heat insulating material 21 can be increased without increasing the refrigerator wall and reducing the internal volume. While increasing, it becomes possible to insulate the heat radiating from the heat radiating pipe side 18S to the inside of the warehouse by the vacuum heat insulating material 21.

  That is, when the folded portion 18S-1 of the heat radiating pipe side 18S is covered with the vacuum heat insulating material 21 having only the vertical groove 22a without the lateral groove 22b, the outer casing 3 and the vacuum insulation of the folded portion 18S-1 portion of the radiating pipe side 18S are covered. Although a space corresponding to the diameter of the heat radiating pipe is formed between the material 21 and the refrigerator wall thickness is increased, the internal volume of the refrigerator is reduced. According to the present embodiment, the folded portion of the heat radiating pipe side 18S is placed in the horizontal groove 22b. Since 18S-1 is located, there is no space for the heat radiating pipe diameter between the vacuum heat insulating material 21 and the outer box 3, the refrigerator wall thickness is not increased, and the internal volume is not reduced. .

  Moreover, since the conventional thing which only provided the vertical groove in the vacuum heat insulating material as described in the background art has a configuration in which the folded portion of the heat radiating pipe is not covered with the vacuum heat insulating material (see FIG. 13), the heat radiating pipe The upper and lower folded parts are exposed from the vertical groove, and heat radiation from the folded part of the heat radiating pipe to the inside of the warehouse cannot be insulated with the vacuum heat insulating material, and the vertical dimension of the vacuum heat insulating material becomes short, The coverage of the vacuum heat insulating material is low.

  However, by providing the horizontal groove 22b together with the vertical groove 22a and positioning the folded portion 18S-1 of the heat radiating pipe side 18S in the horizontal groove 22b as in the present embodiment shown in FIG. 6, the refrigerator wall thickness is increased. The folded portion 18S-1 of the heat radiating pipe side 18S can also be covered with the vacuum heat insulating material 21, and the vacuum heat insulating material 21 has a side surface of the outer box 3 as shown by broken lines in FIG. It can be enlarged to the extent that it overlaps with the upper and lower edge edges, specifically, the ceiling wall thickness of the heat insulation box 1. Therefore, the heat radiation from the heat radiating pipe side 18S to the inside of the warehouse can be surely insulated by the vacuum heat insulating material 21, and the coverage of the vacuum heat insulating material 21 can be dramatically increased. The heat insulation property of the heat insulation box 1 is greatly improved.

  In addition, since the vacuum heat insulating material 21 of this embodiment forms chamfered portions 25 at the front and rear lower portions of the vacuum heat insulating material 21 arranged on the side surface of the heat insulating box 1, the heat insulating box 1 as shown in FIG. Even if the reinforcing member 6 or the like is present at the lower part of the outer side of the outer box, the lateral dimension can be maximized while widening the width, and the side coverage can be greatly increased. In particular, since the vacuum heat insulating material 21 is arranged in the outer box 3 so as not to overlap the reinforcing member 6, the vacuum heat insulating material 21 exists at the lower side of the side surface of the heat insulating box 1 at the chamfered portion 25. The reinforcing member 6 and the like can be surely avoided. As a result, the vacuum heat insulating material 21 can be maximized in the downward direction while widening the width of the vacuum heat insulating material 21 to the full width of the side surface of the heat insulating box. Therefore, the coverage of the side surface can be significantly increased without impairing the effect of increasing the box strength by the reinforcing member 6. And since the lower part of the vacuum heat insulating material 21 does not overlap with the reinforcing member 6 etc. at the lower part of the side surface of the heat insulating box, the gas barrier film of the vacuum heat insulating material 21 is damaged by the overlapping with the reinforcing member 6 and the heat insulating performance is impaired. It is possible to wipe out the concerns and to secure good heat insulation performance over a long period of time.

  The reinforcing member 6 is arranged in a U-shape from the front part of the outer box side surface along the bottom part and the rear part, and the upper ends of the front part and the rear part of the reinforcing member 6 located on the outer box side surface are reinforced. Since the member chamfered portion 26 is formed, the vacuum heat insulating material 21 can reduce the chamfered portion 25 by the synergistic effect of the chamfered portion 25 of the vacuum heat insulating material 21 and the reinforcing member chamfered portion 26 of the reinforcing member 6. Therefore, the area of the vacuum heat insulating material is increased, the coverage is improved, and higher heat insulation can be secured.

Further, the chamfered portion 25 provided in the vacuum heat insulating material 21 is formed in a portion where the horizontal groove 22b is provided. In other words, the lower horizontal groove 22b provided in the vacuum heat insulating material 21 is formed including the chamfered portion 25. Therefore, while maximizing the downward dimension of the vacuum heat insulating material 21 to improve the vacuum heat insulating material coverage at the lower side, the folded portion 18S-1 of the heat radiating pipe side 18S is positioned in the horizontal groove 22b and the heat radiating pipe side The vacuum heat insulating material coverage ratio for 18S can also be improved, and the heat insulating property can be further enhanced.

  Further, the lower lateral groove 22b provided in the vacuum heat insulating material 21 is formed below the upper ends of the front and rear portions of the reinforcing member 6, so that the lower lateral grooves 22 b are lower than the upper ends of the front and rear portions of the reinforcing member 6. The folding | returning part 18S-1 of the located heat radiating pipe side 18S can be located in the horizontal groove 22b, and the thermal insulation can be improved by aiming at the coverage improvement of the vacuum heat insulating material 21 with respect to the heat radiating pipe side 18S.

  Further, as shown in FIG. 6, the horizontal groove 22b provided in the vacuum heat insulating material 21 is a portion closer to the center than the upper and lower end surface portions 23 of the vacuum heat insulating material 21 (the upper horizontal groove 22b is lower than the upper end surface portion 23). Since the horizontal groove 22b is provided in the upper part of the lower end surface portion 23), the vertical groove 22a is formed up to the upper and lower end surface portions 23 of the vacuum heat insulating material 21 so as to intersect with the horizontal groove 22b. Thick portions 22d without grooves remain in the upper and lower end surface portions of the material 21. Thereby, the strength of the upper and lower end surface portions 23 of the vacuum heat insulating material 21 is improved as compared with the case where the lateral groove 22b is formed so as to face the end surface portion 23 of the vacuum heat insulating material 21 and the end surface portion remains thin due to the groove. In addition, warping, deformation, and the like of the vacuum heat insulating material 21 are minimized, and the attachment to the outer box 3 is facilitated, and man-hours can be reduced and quality can be improved.

  In addition, by making the thick portions 22d of the upper and lower end face portions 23 of the vacuum heat insulating material 21 into paste surfaces for attaching to the outer box 3, it becomes possible to prevent inflow when filling the foam heat insulating material 5. Thus, it becomes possible to prevent the outer box from being deformed by foaming pressure.

  Furthermore, since the groove width of the horizontal groove 22b is wider than the groove width of the vertical groove 22a, the turn bending diameter of the upper and lower folded portions 18S-1 of the heat radiating pipe side 18S passing through the horizontal groove 22b can be designed to be large. It becomes possible. As a result, the stretching force acting on the pipe wall when the folded portion 18S-1 is folded can be reduced, and the pipe diameter of the folded portion 18-S1 is not reduced, and the reliability of the heat radiating pipe side 18S or the heat radiating pipe front 18F is improved. It is possible to ensure the safety.

  In addition, among the horizontal grooves 22b provided above and below, the width of the lower horizontal groove 22b is larger than that of the upper horizontal groove 22b, so that a heat radiating pipe can be optimally installed and the workability of pipe connection and the like is improved. be able to. That is, the heat radiating pipe side 18S or the heat radiating pipe front 18F of the heat radiating pipe 18 needs to be welded to a refrigerant pipe (not shown) from the condenser, and the heat radiating pipe side 18S has a folded portion 18S-1 at the upper and lower portions. Therefore, if the width of the lower horizontal groove 22b is increased, a large number of folded portions 18S-1 of the heat radiating pipe side 18S can be arranged in the lower horizontal groove 22b, and at the same time, the heat radiating pipe front 18F is also partitioned through the horizontal groove 22b. Many pipes such as piping to the front part of the plate 20 can be disposed, and the heat radiating pipe side 18S or the heat radiating pipe front 18F is welded to the refrigerant pipe (not shown) from the condenser when it exits the lateral groove 22b. The connection work can be done at a lower position on the lower side of the outer box 3 than on the upper side of the outer box 3 To be is the attained also improve the optimal installation and simultaneously workability radiating pipe 18.

  In addition, although it is possible to provide two or more horizontal grooves 22b according to the required performance of the refrigerator, in that case, it is preferable to maximize the width dimension of the horizontal grooves 22b provided in the lowermost part.

In this embodiment, the pipe end portion 18T, which is a connecting portion between the heat radiating pipe side 18S and the heat radiating pipe front 18F disposed in the lateral groove 22b, is turned to turn portions 18T-1, 18T- as shown in FIGS. 2 is formed at two or more locations, and a vacuum heat insulating material 21 attached to the inner surface of the outer box 3 at the time of welding connection between the heat radiating pipe side 18S or the heat radiating pipe front 18F and a refrigerant pipe (not shown) from the condenser. It can be prevented from being peeled off or damaged, so that the heat insulating performance of the vacuum heat insulating material 21 can be maintained satisfactorily, and the external appearance deformation of the outer box 3 and the reduction of the heat radiating ability from the heat radiating pipe side 18S can be prevented.

  That is, the pipe end 18T of the heat radiating pipe side 18S or the heat radiating pipe front 18F is accommodated along the inner surface of the outer box 3 as shown in FIG. When connecting 18T by welding or the like, the pipe end 18T is pulled out from the outer box. At this time, an external force in the peeling direction is applied to the vacuum heat insulating material 21 via the pipe end 18T. There is concern that the inner case 3 may be peeled off or damaged. In addition, there is a concern that the outer appearance of the outer box 3 may be deformed or the heat radiation capability of the heat radiation pipe side 18S may be reduced.

  However, in the present embodiment, since two or more turn portions 18T-1 and 18T-2 are formed in the pipe end portion 18T, the turn portions 18T-1 and 18T-2 have an external force when the pipe is pulled. It becomes a buffer (deformation absorption), and it is possible to prevent the vacuum heat insulating material 21 affixed to the outer box 3 from being peeled off and being damaged, and at the same time, to prevent the outer case from being deformed and the heat radiation capacity from the heat radiating pipe from being lowered.

  Moreover, since the vacuum heat insulating material 21 in the portion where the pipe end portion 18T is located is a chamfered portion 25, the turn portions 18T-1 and 18T-2 should be provided without difficulty using the chamfered portion 25. In addition, the dimensions up to the portion X (see FIG. 7) where the pipe end portion 18T enters the lateral groove 22b can be increased, and external force can be applied to the vacuum heat insulating material 21 while improving the coverage of the vacuum heat insulating material 21. It is also possible to improve the effect of preventing damage due to peeling.

  In the refrigerator of this embodiment, the air in the vertical groove 22a and the horizontal groove 22b of the vacuum heat insulating material 21 expands due to heat dissipation from the heat radiating pipe side 18S or the heat radiating pipe front 18F, and the pressure rises to radiate heat to the side of the outer box 3. Although deformation along the pipe side 18S is likely to occur, the communication member 27 is provided in the lateral groove 22b, which can be prevented. That is, in this embodiment, as shown in FIG. 5, since the communication member 27 is provided in the lower horizontal groove 22b and faces the space 7, the inside of the vertical groove 22a and the horizontal groove 22b is exposed to the outside air via the communication member 27. It is possible to ventilate, and it is possible to suppress a change in pressure due to a temperature change or the like caused by heat dissipation of the heat radiating pipe, and to prevent external deformation of the outer box 3.

  Further, since the communication member 27 is provided in the horizontal groove 22b whose groove width is set to be larger than the vertical groove 22a, the air staying in the plurality of vertical grooves 22a is circulated in the horizontal groove 22b side in a short time. Become. In addition, since the lateral groove 22b having a large groove width is provided with several folded portions 18S-1 of the heat radiating pipe side 18S and the heat radiating pipe front 18F, the temperature of the air in the horizontal groove 22b itself becomes high. The staying air can be circulated more easily, and smooth air discharge can be realized.

  Furthermore, since the communication member 27 is only inserted into the hole 28 of the reinforcing member 6 and communicated with the outside air through the space 7 provided in the reinforcing member 6, the number of parts is small, and the communication member 27. It becomes possible to simplify the shape. For example, the communication member 27 can be produced by extrusion molding into a linear shape using a resin, and material costs and man-hour costs can be suppressed.

Further, the foam heat insulating material 5 filled between the outer box 3 and the inner box 4 of the heat insulation box 1 has the front opening portion of the heat insulation box 1 facing the bottom surface in order to improve the filling property. The material of the foam heat insulating material 5 is injected downward from the opening provided on the back surface of the foam, and the foam heat insulating material 5 is gradually moved from the lower side (front opening side) toward the upper side (back side of the heat insulating box 1). In this embodiment, one end of the communication member 27 is disposed along the lateral groove 22b of the vacuum heat insulating material 21 and the other end communicates with the outside air on the back side of the heat insulating box 1 in this embodiment. Therefore, air escapes through the communication member 27 in the same direction as the foam insulation material 5 is foam-filled, and the efficiency of air venting in the groove at the time of foam-filling can be improved.

  In addition, although the said communication member 27 demonstrated in the linear form, this communication member 27 can also be set as the structure which consists of a part parallel to the horizontal groove 22b, and the part which bent and stood up. This uses a foaming jig to prevent deformation due to foaming pressure when the foam insulation 5 is filled between the outer box 3 and the inner box 4, but a heat radiating pipe or communication member fixed to the outer box 3. 27 will exert a relief effect that does not interfere with the foaming jig. And after this, after filling the heat insulation box 1 with the foam heat insulating material 5, the heat radiation pipe and the communication member 27 can be pulled out and given a degree of freedom for placing them at a predetermined position.

(Embodiment 2)
FIG. 10 is a front view showing the vacuum heat insulating material of the refrigerator in the second embodiment.

  The vacuum heat insulating material 21 of this embodiment is different from that of the first embodiment in the shape of the upper lateral groove. That is, the lateral groove 22b ′ of the vacuum heat insulating material 21 is a partial groove only for the portion through which the heat radiating pipe side 18S passes, and the unnecessary portion is a thick-walled portion that eliminates the groove and becomes a paste surface for attachment to the outer box 3. 22d. Other configurations are the same as those of the first embodiment, and the same numbers are added and description thereof is omitted.

  According to this embodiment, the strength of the edge portion of the vacuum heat insulating material 21 can be improved, warpage, deformation, etc. can be minimized, and the attachment to the outer box 3 is easy. Thus, the number of man-hours can be reduced, and the coverage of the vacuum heat insulating material 21 can be improved by optimizing the lateral groove 22b ′ for housing the heat radiating pipe side 18S.

  Further, since the end of the partial groove 22b ′ is in communication with the vertical groove 22a, even if there is a variation in the position of the horizontal groove 22b ′ and the vertical groove 22a at the time of groove formation, this variation can be absorbed. Productivity can be improved.

(Embodiment 3)
FIG. 11 is a front view showing the vacuum heat insulating material of the refrigerator in the third embodiment.

  In the vacuum heat insulating material 21 of this embodiment, a local groove 22e connected from the upper end surface portion 23 of the vacuum heat insulating material 21 to the upper horizontal groove 22b is additionally provided between the vertical grooves 22a. Other configurations are the same as those of the first embodiment, and the same numbers are added and description thereof is omitted.

  The local groove 22e is formed between the vertical grooves 22a so as to be connected from the upper end surface portion 23 of the vacuum heat insulating material 21 to the upper horizontal groove 22b, and the other surface of the heat radiating pipe side 18S, in this embodiment. A bent portion 18S-2 at the bridge portion to the ceiling surface is housed.

That is, in the heat radiating pipe side 18S, an L-shaped bent portion 18S-2 serving as a bridging portion from the ceiling surface of the outer box 3 is disposed in the local groove 22e, the straight portion is set to the vertical groove 22a, and the turned portion 18S-1 is set. Is disposed in the lower horizontal groove, and the end portion thereof is bridged again to the ceiling surface of the outer box 3 through another local groove 22e, and almost the entire heat radiating pipe side 18S is disposed in the vacuum heat insulating material 21. It arrange | positions between the vacuum heat insulating material 21 and an outer case side board, without jumping out from the upper-and-lower end surface part 23. In other words, the vacuum heat insulating material 21 is provided with the lateral grooves 22b and the local grooves 22e so that the upper and lower ends thereof are located near the upper and lower ends of the outer casing 3 beyond the upper and lower bent portions of the heat radiating pipe side 18S. As indicated by the dotted line 2, the upper and lower sides of the outer box 3 are almost entirely covered.

  According to this embodiment, the coverage of the vacuum heat insulating material 21 is increased while maintaining the bending quality of the bridge of the heat radiating pipe side 18S from the side surface of the heat insulating box 1 to the other surface, in this embodiment, the ceiling surface. be able to.

  That is, the outer box 3 of the heat insulation box 1 is formed by bending a flat plate into a U-shape to form the top surface and both side surfaces, but since the heat radiation pipe previously attached to the flat plate has a stretching force when bent, This bent portion may be deformed such that the pipe diameter becomes thin or the pipe wall thickness becomes thin, and there is a concern about quality deterioration. In order to prevent this, the bridging pipe portion of the heat radiating pipe forms a bent portion 18S-2 in an L shape to absorb the stretching force that acts during bending and stabilizes the quality. When the bent portion 18S-2 is formed, the vacuum heat insulating material is shortened by the size of this portion, and the coverage is lowered.

  However, according to this embodiment, the L-shaped bent portion 18S-2 of the bridging pipe portion of the heat radiating pipe can be fitted into the horizontal groove 22b and the local groove 22e connected to the horizontal groove 22b. The dimension of the vacuum heat insulating material 21 can be lengthened to a portion that also covers the portion 18S-2, and the bending quality of the bridging pipe portion can be maintained by providing the L-shaped bent portion 18S-2. .

  The specific configuration of the present invention has been described above with reference to each embodiment. However, this is shown as an embodiment for carrying out the present invention, and it goes without saying that various modifications can be made within the scope of the object of the present invention. .

  For example, the vertical grooves 22a and the horizontal grooves 22b may be increased or decreased in addition to the number illustrated, and may be appropriately selected according to the required performance of the refrigerator.

  Moreover, the structure of the vertical groove 22a and the horizontal groove 22b of the vacuum heat insulating material 21 provided on the side surface of the heat insulating box 1 may be adopted in the vacuum heat insulating material 21 provided on the back surface of the heat insulating box to improve the coverage. The same effect can be obtained.

  The present invention is to provide a refrigerator that can increase the coverage of the vacuum heat insulating material while ensuring the internal volume and can improve the heat insulating property, can optimally install the heat radiating pipe, and has high workability such as pipe connection. It can be applied to various refrigerators including home use and business use.

DESCRIPTION OF SYMBOLS 1 Heat insulation box 2 Door 3 Outer box 4 Inner box 5 Foam heat insulating material 6 Reinforcement member 7 Space 8 Refrigeration room 9 Switching room 10 Ice making room 11 Vegetable room 12 Freezing room 13 Machine room 14 Cooling room 15 Cooler 16 Cold air blower fan 17 Compressor 18 Heat radiating pipe 18S Heat radiating pipe side 18F Heat radiating pipe front 18T Pipe end 18S-1 Folded portion 18S-2 L-shaped bent portion 18T-1, 18T-2 Turn portion 19 Capillary tube 20 Partition plate 21 Vacuum heat insulating material 22a Vertical groove 22b Horizontal groove 22b 'Partial groove 22c Outlet groove 22d Thick part 22e Local groove 23 End face part 24 Bottom partition wall 25 Chamfer part 26 Reinforcement member chamfer part 27 Communication member 28 Hole

Claims (2)

A heat insulating box filled with a foam heat insulating material between the outer box and the inner box, a heat dissipating pipe disposed inside the outer box, and a vacuum heat insulating material provided inside the heat dissipating pipe. The refrigerator is characterized in that the vacuum heat insulating material has a plurality of concave lateral grooves in the front-rear direction, and the width dimension of the lowermost lateral groove is maximized. The refrigerator according to claim 1, wherein a plurality of heat radiating pipes are arranged in the bottom horizontal groove.

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