JP2013185735A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator that has improved energy-saving performance by reducing the heat effect of a heat dissipation pipe to sufficiently exert the heat insulation effect of a vacuum insulation material attached to a side surface of an external box.SOLUTION: A refrigerator includes a refrigerator body filled with a foam insulation material 4 between an external box 2 and an inner box, and a door 5a for opening and closing a front opening of the body. The refrigerator is configured such that a vacuum insulation material 9 is provided in an inner surface of the external box of the refrigerator body, the opening of the refrigerator body is configured by overlapping edges of the external box and the inner box, a heat dissipation pipe 8 is arranged between the overlapped portions of the edge of the external box and the edge of the inner box, and the edge of the inner box is positioned adjacent to the side of the vacuum insulation material of the heat dissipation pipe. This configuration allows the resin-made edge of the inner box to block the diffusion of heat toward the vacuum insulation material from the heat dissipation pipe, and accordingly, the vacuum insulation material is disposed to near the heat dissipation pipe to increase the insulation performance of the side wall increases, thus improving energy-saving performance.

Description

  The present invention relates to an energy saving structure of a refrigerator in which a vacuum heat insulating material is arranged in a heat insulating box.

  In recent years, as the demand for larger refrigerators and reduced installation space has increased, the refrigerator insulation wall has been made thinner, replacing the condenser in the machine room (located at the bottom of the refrigerator) with a heat radiating pipe attached to the refrigerator wall. A device has been devised to eliminate invalid spaces.

  In recent years, vacuum heat insulating materials have begun to be frequently used in order to reduce the thickness of the refrigerator heat insulating wall and prevent heat from entering the refrigerator by attaching a heat radiating pipe to the refrigerator wall surface.

  Under such circumstances, recently there has been a tendency to increase the area where vacuum insulation is applied, and vacuum insulation is provided as much as possible on the side of the refrigerator body to strongly block the outside temperature and further save energy. Things that have become more advanced can be considered.

  However, a heat radiating pipe of the refrigeration cycle is disposed at the opening edge of the refrigerator main body so as not to cause condensation (see, for example, Patent Document 1).

  FIG. 7 shows a part of the door of the refrigerator described in Patent Document 1. The refrigerator body of the refrigerator has a substantially U-shaped inner box insertion groove 103 on the front opening edge of the outer box 101 via a double flange 102. The inner and outer boxes 104 and 101 are joined by inserting and fitting the flange 105 of the inner box 104 into the inner box insertion groove 103, and the inside is filled with a foam heat insulating material 106. . The heat radiating pipe 107 for preventing dew condensation is disposed between the inner surface of the corner portion of the outer box 101 and the side surface of the inner box insertion groove 103, and the portion facing the door (not shown) is warmed to prevent dew condensation. ing.

Japanese Patent Laid-Open No. 5-60456

  According to the above conventional configuration, although condensation on the opening edge of the refrigerator main body can be prevented, there is a problem that the effect is still one step even if a vacuum heat insulating material is attached to the side surface of the refrigerator main body. The heat radiated from the heat radiating pipe 107 penetrates into the foam heat insulating material 106, and in order to raise the temperature in the vicinity of the pipe, the vacuum heat insulating material must be installed away from the heat radiating pipe 107. This is because the vacuum heat insulating material cannot be spread out to the vicinity of the opening where heat insulation is most likely to occur and it cannot be strongly insulated. Therefore, heat penetration from this portion could not be reduced efficiently, and sufficient heat insulation could not be achieved despite the provision of a vacuum heat insulating material.

  In addition, since the heat radiating pipe 107 is provided at the boundary between the outer box 101 and the side part, which is the corner part, the heat from the heat radiating pipe 107 is directly transferred to the side part of the outer box 101 made of a metal plate. The dispersed heat spreads to the entire side surface of the outer box 101 through the outer cover of the vacuum heat insulating material affixed to the inner surface of the outer side of the outer box 101, and deteriorates the heat insulating property by the vacuum heat insulating material. The effect may be reduced.

  The present invention has been made in view of the above points, and is capable of reducing the heat effect of the heat radiating pipe and sufficiently exhibiting the heat insulating effect of the vacuum heat insulating material attached to the side surface portion of the outer box. It provides a refrigerator with an improved quality.

  In order to achieve the above object, the present invention provides a refrigerator main body comprising a metal outer box, a resin inner box, and a foam heat insulating material filled between the outer box and the inner box, and a front surface of the refrigerator main body. A door that opens and closes the opening, and a vacuum heat insulating material is provided in a side surface of the outer box of the refrigerator body, and the opening of the refrigerator body is formed by superposing edges of the outer box and the inner box, and The edge of the outer box is superposed so that the edge of the outer box is located on the door side and covers the edge of the inner box, and the edge of the outer box and the inner box of the part facing the door A heat radiating pipe is arranged between the overlapping portions with the edge, and the vacuum heat insulating material side of the heat radiating pipe is covered with the edge of the inner box.

  As a result, the heat distribution from the heat radiating pipe to the vacuum heat insulating material side is blocked by the resin edge of the inner box, thereby reducing the temperature of the heat insulating material near the heat radiating pipe. It can be installed close to the opening, that is, near the opening, and the installation area can be enlarged, and the heat insulation effect of the side wall can be increased to prevent heat from entering strongly.

  The present invention can further improve the energy saving by minimizing the influence of heat radiation by the heat radiating pipe, expanding the installation area of the vacuum heat insulating material, enhancing the heat insulating effect and reducing the heat intrusion into the cabinet. .

Front view of the refrigerator according to Embodiment 1 of the present invention The perspective view when the door of the refrigerator by the same embodiment 1 is removed Front view when the door of the refrigerator according to the first embodiment is removed AA sectional view of FIG. 1 for explaining the refrigerator according to the first embodiment BB sectional drawing of FIG. 4 explaining the refrigerator by the same Embodiment 1 The expanded sectional view of the X section of Drawing 5 explaining the refrigerator by Embodiment 1 Sectional drawing which shows a part of conventional refrigerator

  1st invention opens and closes the refrigerator main body comprised from the metal outer box, the resin inner box, the foaming heat insulating material with which the outer box and the inner box are filled, and the front opening part of the said refrigerator main body And a vacuum heat insulating material is provided in a side surface of the outer box of the refrigerator main body, and an opening of the refrigerator main body is formed by superposing edges of the outer box and the inner box, and the outer box The edge of the outer box is overlapped so that the edge of the outer box is located on the door side and covers the edge of the inner box, and the edge of the outer box and the edge of the inner box of the part facing the door A heat dissipating pipe is arranged between the overlapping portions, and the vacuum heat insulating material side of the heat dissipating pipe is covered with the edge of the inner box.

  As a result, the heat distribution from the heat radiating pipe to the vacuum heat insulating material side is blocked by the resin edge of the inner box, thereby reducing the temperature of the heat insulating material near the heat radiating pipe. It can be installed close to the opening, that is, near the opening, and the heat insulation effect of the side wall can be increased to prevent heat from entering strongly.

In the second invention, the edge of the outer box of the first invention is folded to form a double flange, and a substantially U-shaped part is provided at the end, and the edge of the inner box forms a recess. The concave portion is fitted to the substantially U-shaped portion of the outer box, and a heat radiating pipe is disposed between the concave portion and the substantially U-shaped portion, so that the edge of the outer box facing the door has a double structure. The edge of the outer box that contacts the heat radiating pipe is connected to the side surface via the double flange, so the heat conduction distance to the vacuum heat insulating material is increased, and the heat dissipation at this double flange is The amount of heat conduction / dispersion is reduced by the action, and accordingly, the vacuum heat insulating material can be further extended to the heat radiating pipe, that is, the vicinity of the opening, and the heat intrusion can be strongly prevented.

  The third invention has a configuration in which the substantially U-shaped portion of the outer box of the first or second invention and the end of the vacuum heat insulating material are in a non-contact state, and the foam heat insulating material is positioned between the two. It is possible to prevent the deterioration of the heat insulating performance caused by the vacuum heat insulating material being in contact with the substantially U-shaped portion.

  According to a fourth invention, in the first to third inventions, the concave portion of the inner box is configured to be press-fitted and fitted into the substantially U-shaped portion of the outer box. A gap is no longer generated, and the merchantability can be improved as well as energy saving.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a front view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a perspective view when the door of the refrigerator is removed, FIG. 3 is a front view when the door of the refrigerator is removed, and FIG. 1 is a cross-sectional view taken along the line AA in FIG. 1 for explaining the refrigerator, FIG. 5 is a cross-sectional view taken along the line BB in FIG. 4 for explaining the refrigerator, and FIG.

  1 to 6, the refrigerator main body 1 includes a metal (for example, iron plate) outer box 2 that opens forward, a hard resin (for example, ABS) inner box 3, and an outer box 2 and an inner box 3. It is comprised with the heat insulation box which consists of foam heat insulating materials 4, such as foam-filled urethane, and the some storage chamber is compartmented and formed in this main body. The storage room is a refrigerator room 5, a vegetable room 6 provided below the refrigerator room 5, and a freezer room 7 provided at the lower part of the vegetable room 6 from above. As shown in FIG. 3, the front of the refrigerator compartment 5 and the vegetable compartment 6 is a single door 5a, and the front of the freezer compartment 7 is closed freely by a dedicated door 7a.

  The refrigerator body 1 has a cooling chamber on the back surface thereof, and as is well known, includes a cooler (not shown) that generates cold air and a cold air blower fan (not shown) that supplies the cold air to each chamber, The internal temperature is controlled by a temperature detection sensor (not shown) and a damper (not shown) in the storage. A compressor (not shown), a condenser (not shown), a heat radiating pipe 8, a capillary tube (not shown), and a cooler (not shown) are arranged in the lower back of the main body. The refrigerant is sealed in a refrigeration cycle that is sequentially connected in a ring shape to perform a cooling operation. In recent years, a flammable refrigerant is often used as the refrigerant for environmental protection.

  A heat radiating pipe 8 is disposed on both side portions 1a, the back surface portion 1b, and the top surface portion 1c of the refrigerator body 1, and a heat radiating length is secured by bending one pipe. The heat radiating pipe 8 is attached to the inner surface of the outer box 2 of the refrigerator body 1 by tape or the like, and a vacuum heat insulating material 9 is attached to the inner surface of the outer box 2 at a necessary place so as to cover the heat radiating pipe 8.

  The vacuum heat insulating material 9 has a thermal conductivity of 0.008 to 0.0005 W / m · K, which is extremely excellent in heat insulation performance. Therefore, even if the wall thickness of the refrigerator main body 1 is reduced, the vacuum heat insulating material 9 enters the storage chamber. It is possible to effectively reduce the amount of heat generated.

The outer box 2 of the refrigerator body 1 has a heat radiating pipe 8 attached to a single plate in advance with a tape, and the plate is bent to form left and right side portions 1a and a top surface portion 1c. The part 1b is attached and formed. The refrigerator body 1 is formed by stacking the inner box 3 on the outer box 2 and foam-filling the foam heat insulating material 4 therebetween.

  Next, the positional relationship between the attachment of the heat radiating pipe 8 and the vacuum heat insulating material 9 in the opening of the refrigerator body 1 will be described.

  FIG. 6 is an enlarged view of the portion X in FIG. 5, that is, the opening of the refrigerator main body 1 and a part of the door covering the opening, and the airtight gasket usually attached to the door is removed. It is.

  In the same figure, the edge of the outer box 2 constituting the refrigerator body 1 is folded outward to form a double flange 11, and its end is further folded inward in a substantially U shape to form a substantially U-shaped portion 12. , And the final end portion thereof is an inclined piece 13 that is inclined in the direction in which the opening of the substantially U-shaped portion 12 is widened. On the other hand, the edge of the inner box 3 forms a recess 14 toward the side opposite to the door 5a, and the recess 14 is fitted into the substantially U-shaped part 12 of the outer box 2 and press-fitted. The heat radiating pipe 8 is provided between the double flange 11 and the recess 14.

  Moreover, the vacuum heat insulating material 9 is affixed on the inner surface of the outer box 2 with an adhesive or the like, and its end portion 9a is installed in the vicinity so as not to contact the substantially U-shaped portion 12 and the inclined piece 13 of the outer box 2. is there. Here, the non-contact range refers to the following. That is, the vacuum heat insulating material 9 is constituted by a core material made of a highly heat-conductive outer bag made of an aluminum film or the like having a multilayer laminated structure that prevents gas permeation, a fine powder such as silica or pearlite, or an inorganic fiber. After the core material is sealed in the jacket bag, the gas (air) in the jacket bag is evacuated, vacuumed and sealed by heat sealing. Therefore, although not shown in the figure, an ear piece is present at the peripheral edge of the jacket bag. This ear piece is sandwiched and fixed between the vacuum heat insulating material 9 and the inner wall of the outer box 2, but it may be protruded as it is due to production variations, etc. Say that.

  In addition, it is the same as that of the past that the foam heat insulating material 4 exists between the edge part 9a of the said vacuum heat insulating material 9, and the substantially U-shaped part 12 and the inclination piece 13 of the outer box 2. FIG.

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

  First, cooling of the refrigerator will be described. For example, the compressor (not shown) is started when the refrigerator compartment temperature rises due to the intrusion heat from the outside air and door opening / closing in the refrigerator compartment 5 and the freezer compartment sensor (not shown) exceeds the starting temperature. Then cooling starts. While the high-temperature and high-pressure refrigerant discharged from the compressor finally reaches the dryer (not shown) disposed in the machine room (not shown), particularly in the heat radiating pipe 8 installed in the outer box 2, It is cooled and liquefied by heat dissipation by heat exchange with the air outside the outer box 2 and the foamed heat insulating material 4 in the warehouse.

  The liquefied refrigerant is decompressed by a capillary tube (not shown), flows into a cooler (not shown), and exchanges heat with the internal air around the cooler. The cold air that has undergone heat exchange is blown into the cabinet by a nearby cool air blower fan (not shown) to cool the inside of the cabinet. Thereafter, the refrigerant is heated and gasified to return to the compressor. When the inside of the refrigerator is cooled and the temperature of the freezer compartment sensor (not shown) becomes equal to or lower than the stop temperature, the operation of the compressor is stopped.

  Here, the heat radiation and heat insulation action in the vicinity of the opening of the refrigerator main body 1 of the heat radiating pipe 8 will be described. The heat radiating pipe 8 arranged in the opening of the refrigerator body 1 is located between the double flange 11 of the outer box 2 and the recess 14 of the inner box 3, and warms the temperature of the double flange 11 above the dew condensation temperature. Prevents condensation.

  On the other hand, the heat dissipated from the heat radiating pipe 8 toward the foam heat insulating material 4 side is located between the foam heat insulating material 4 and the concave wall 14 of the resin inner box. It will be blocked. Therefore, the temperature rise of the foam heat insulating material 4 in the vicinity of the heat radiating pipe 8 is lower than that in the past, and even if the end 9a of the vacuum heat insulating material 9 attached to the inner surface of the outer box 2 is brought close to the heat radiating pipe 8 Heat insulation increases the temperature of the jacket, and heat insulation deterioration caused by heat conduction and dispersion can be suppressed.

  Further, the heat radiated from the heat radiating pipe 8 toward the door 5a side prevents the dew condensation by heating the temperature of the double flange 11 to the dew condensation temperature or more as described above. The heat conduction and dispersion amount to the side surface is reduced by the heat radiation action, and the heat conduction distance to the side surface to which the vacuum heat insulating material 9 is attached by the double flange 11 is increased. Therefore, the temperature of the side part of the outer box near the opening is lower than the conventional temperature.

  Because of the above-described actions, in this refrigerator, the end 9a of the vacuum heat insulating material 9 affixed to the inner surface of the outer box 2 can be installed in the vicinity of the heat radiating pipe 8, that is, in the vicinity of the opening. It is easy to get close to the temperature, and heat intrusion from the opening portion that most requires heat insulation can be efficiently suppressed, and energy saving performance is improved.

  Further, the substantially U-shaped part 12 of the outer box 2 and the end 9a of the vacuum heat insulating material 9 are not in contact with each other, and the foamed heat insulating material 4 is located between them. Therefore, it is possible to prevent the heat insulation performance from being deteriorated due to the contact of the vacuum heat insulating material 9 with 12. That is, since the vacuum heat insulating material 9 is provided with a highly heat-conductive outer cover bag made of an aluminum film or the like as already described, the outer cover bag is substantially U-shaped portion 12 or the inclined piece 13 of the outer box 2. The temperature of the substantially U-shaped portion 12 and the inclined piece 13 is suppressed to be lower than that of the conventional case, but the heat spreads over the entire area of the vacuum heat insulating material 9 through the jacket and causes deterioration of heat insulation. However, this can also be prevented.

  In particular, in this embodiment, the vacuum heat insulating material 9 is provided apart from the dimension of the ear piece portion that can be formed into the jacket bag. Even if it protrudes from the gap, it can be surely prevented from coming into contact with the vacuum heat insulating material 9 and is effective.

  On the other hand, the refrigerator body 1 is integrated by fitting the concave portion 14 of the inner box 3 to the substantially U-shaped portion 12 of the outer box 2. Since the U-shaped portion 12 is press-fitted and fitted, there is no occurrence of a gap in the fitted portion. That is, a gap is not generated between the two, which are most easily noticeable, and it is possible to improve the energy efficiency and the productability. Moreover, since the inclined piece 13 is provided in the substantially U-shaped part 12, the recess 14 can be easily fitted into the substantially U-shaped part 12, and the productivity is improved.

  The specific configuration described in the above embodiment is shown as an example for realizing the present invention, and it goes without saying that various modifications can be made within the scope of achieving the object of the present invention.

  As described above, the present invention can further improve energy saving by minimizing the influence of heat radiation by the heat radiating pipe, expanding the installation area of the vacuum heat insulating material, and enhancing the heat insulating effect to reduce heat intrusion. Suitable for refrigeration equipment in general.

DESCRIPTION OF SYMBOLS 1 Refrigerator main body 1a Both sides 1b Back part 1c Top part 2 Outer box 3 Inner box 4 Foam insulation 5 Refrigerating room (storage room)
5a Door 6 Vegetable room (storage room)
7 Freezer room (storage room)
7a Door 8 Radiation pipe 9 Vacuum heat insulating material 9a End portion 11 Double flange 12 Substantially U-shaped portion 13 Inclined piece 14 Recessed portion

Claims (4)

A refrigerator body composed of a metal outer box, a resin inner box, and a foam heat insulating material filled between the outer box and the inner box, and a door that opens and closes a front opening of the refrigerator body, A vacuum heat insulating material is provided on the inner surface of the outer box of the refrigerator main body, the opening of the refrigerator main body is formed by superposing the edges of the outer box and the inner box, and the edge of the outer box is the outer box. The edge portion of the inner box is superposed so as to cover the edge portion of the inner box, and a heat radiating pipe is interposed between the overlapping portion of the outer box edge portion and the inner box edge portion facing the door. A refrigerator that is arranged and covers the vacuum heat insulating material side of the heat radiating pipe with the edge of the inner box. The edge of the outer box is folded to form a double flange and a substantially U-shaped part is provided at the end thereof, and the edge of the inner box is formed with a recess to make the recess substantially the U-shaped part of the outer box. The refrigerator according to claim 1, wherein a heat radiating pipe is disposed between the concave portion and the substantially U-shaped portion, and an edge portion of the outer box facing the door has a double structure. The refrigerator according to claim 1 or 2, wherein the substantially U-shaped portion of the outer box and the end portion of the vacuum heat insulating material are in a non-contact state, and the foam heat insulating material is positioned therebetween. The refrigerator according to any one of claims 1 to 3, wherein the concave portion of the inner box is press-fitted and fitted into a substantially U-shaped portion of the outer box.