JP2006177592A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator with a large heat dissipation amount capable of preventing piping breaks without increasing manhours. <P>SOLUTION: The refrigerator is provided with a metal plate 10 having a top face part 10c forming a top face of a heat insulating box body 4 covering storage chambers 2 and 3, and side face parts 10a and 10b adjacent to the top face part 10c and forming side faces of the heat insulating box body 4, and first heat dissipation pipes 6a and 6b and a second heat dissipation piping 6c and a dew formation preventing piping 7 passing a refrigerant and comprising a high temperature side of a refrigerating cycle. The first heat dissipation pipes 6a and 6b are attached to the side face parts 10a and 10b to carry out heat dissipation, the second heat dissipation piping 6c is attached to the top face part 10c to carry out heat dissipation, the dew formation preventing piping 7 connects the first heat dissipation piping 6a and 6b and the second heat dissipation piping 6c, and it is attached to a front face side of the metal plate 10 to prevent dew formation of front parts of the storage chambers 2 and 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a refrigerator in which a heat radiating pipe is provided on a metal plate arranged on an outer surface of a heat insulating box that covers a storage chamber.

  A conventional refrigerator opens and closes a front opening of a main body having a storage room with a door. The wall surface of the main body is formed of a heat insulating box, and the storage chamber is covered with the heat insulating box. The outer surface of the heat insulating box is covered with a metal plate such as an iron plate, and an inner box made of a resin molded product is arranged on the inner surface. Between the metal plate and the inner box is filled with foamed resin to insulate and isolate the storage chamber from the outside air.

  The refrigerator is provided with a compressor through which refrigerant flows and operates the refrigeration cycle. A condenser is connected to the refrigerant outflow side of the compressor, and a cooler is connected to the refrigerant inflow side. A capillary tube is disposed between the cooler and the condenser. The gas refrigerant compressed to high temperature and high pressure by the compressor is condensed by the condenser. The condensed refrigerant is decompressed by the capillary tube, vaporized by the cooler, and returned to the compressor.

  Cold air is generated by heat exchange with the cooler on the low temperature side by the operation of the refrigeration cycle, and the cold air is sent to the storage chamber to cool the storage chamber. The condenser on the high temperature side of the refrigeration cycle exchanges heat with the outside air to dissipate heat. The condenser is composed of a heat radiation pipe and a dew prevention pipe which are attached to the metal plate of the heat insulation box.

  The heat radiating pipe transfers heat to the metal plate, and radiates heat from the entire metal plate so that high heat radiation efficiency can be obtained. As disclosed in Patent Document 1, the dew condensation prevention pipe is arranged at the front end of the heat insulating box. By dissipating heat from the dew condensation prevention pipe, dew condensation due to outside air flowing into the storage chamber when the door is opened can be prevented.

  The heat radiating pipe and the heat generating pipe are attached to the developed metal plate, and then the metal plate is bent by pressing or the like. FIG. 8 is a plan view showing an example of the developed metal plate. The metal plate 10 has a top surface portion 10c that becomes a top surface of the heat insulation box, and side portions 10a and 10b that are side surfaces of the heat insulation box are provided adjacent to both side portions of the top surface portion 10c. The dew prevention piping 7 is locked to the front end portion of the metal plate 10 and is disposed over the side surface portions 10a and 10b and the top surface portion 10c. A partition wall (not shown) for partitioning the storage chamber is formed integrally with the heat insulating box, and a portion 7a of the dew prevention pipe 7 is bent and disposed on the front surface of the partition wall.

  The heat dissipating pipe 6 is divided into two parts, one heat dissipating pipe 6a is arranged from the side face part 10a to the top face part 10c, and the other heat dissipating pipe 6b is arranged on the side face part 10b. The heat radiation pipes 6a and 6b are connected by a dew condensation prevention pipe 7, and are closely fixed to the metal plate 10 by an adhesive tape 12 such as aluminum having high thermal conductivity. Note that the dew condensation prevention pipe 7 is intended to raise the temperature on the inner surface side of the heat insulating box, and thus does not need to be tightly fixed to the metal plate.

The metal plate 10 is bent at a fold line 10d by pressing or the like, and a condenser 8 including a heat radiation pipe 6 and a dew prevention pipe 7 is provided on the side surface and the top surface of the heat insulation box.
Japanese Patent Laid-Open No. 2001-12841 (page 2 to page 3, FIG. 14)

  However, according to the conventional refrigerator, when the metal plate 10 is bent, a tensile force is generated in the bent portion of the heat radiation pipe 6a and the dew prevention pipe 7 straddling the side surface portion 10a and the top surface portion 10c. At this time, since the heat radiating pipe 6a is fixed, it cannot be moved, and the tensile force is larger than the tensile strength of the heat radiating pipe 6a, and there is a problem that pipe breakage occurs.

  As shown in FIG. 9, if the heat radiation pipe 6 is not provided on the top surface portion 10c, pipe breakage can be prevented, but the heat radiation amount of the heat radiation pipe 6 is reduced and the heat radiation efficiency is lowered. Further, if the condenser 8 and the metal plate 10 are respectively bent in advance and the condenser 8 is fixed to the metal plate 10, there is a problem that the number of man-hours increases.

  An object of the present invention is to provide a refrigerator with a large heat radiation amount that can prevent pipe breakage without increasing the number of steps.

  In order to achieve the above object, the present invention comprises a top surface portion that forms a top surface of a heat insulation box that covers a storage chamber, and a side surface portion that forms a side surface of the heat insulation box body by bending adjacent to the top surface portion. And a first and second heat radiating pipe and a dew condensation preventing pipe through which the refrigerant flows and forms a high temperature side of the refrigeration cycle, and the first heat radiating pipe is attached to the side surface to dissipate heat. A second heat radiation pipe is attached to the top surface portion to dissipate heat, and the dew generation prevention pipe connects the first and second heat radiation pipes and is attached to the front side of the metal plate to It is characterized by preventing dew formation.

  According to this configuration, the top surface of the heat insulation box is covered with the top surface portion of the metal plate, and the side surface of the heat insulation box is covered with the side surface portion of the bent metal plate. The first heat radiating pipe attached to the side surface portion is connected to the second heat radiating pipe via the dew generation preventing pipe disposed on the front side of the metal plate, and the second heat radiating pipe is attached to the top surface portion. The first and second heat radiation pipes and the dew condensation prevention pipe constitute a condenser through which the refrigerant flows and become the high temperature side of the refrigeration cycle, and radiate heat by exchanging heat with the outside air by the operation of the refrigeration cycle. The first heat radiation pipe can be provided on one side surface or both side surfaces of the heat insulating box.

  According to the present invention, in the refrigerator configured as described above, a flange portion for slidably locking the dew condensation prevention pipe is formed at the front end of the metal plate by bending the metal plate, and the second heat radiating pipe passes therethrough. A notch is provided in the flange portion. According to this configuration, the dew condensation prevention pipe is positioned by the locking of the flange portion, and slides when the metal plate is bent to absorb the elongation.

  Moreover, the present invention is characterized in that in the refrigerator having the above-described configuration, the first and second heat radiation pipes are fixed to the metal plate by a fixing member having thermal conductivity. According to this configuration, the first and second heat radiation pipes are attached to the side surface portion and the top surface portion with an aluminum adhesive tape or the like.

  Moreover, the present invention is characterized in that, in the refrigerator configured as described above, the second heat radiation pipe meanders in an S shape. According to this configuration, the second heat radiation pipe meanders back and forth or right and left, and a part of the second heat radiation pipe is arranged at the front portion of the top surface portion.

  According to the present invention, the first and second heat radiation pipes fixed to the side surface portion and the top surface portion of the metal plate are connected by the front-end movable free dew condensation prevention pipe. The first and second heat radiation pipes are not bent, and the refrigerator can be obtained with a large heat radiation amount by preventing pipe breakage without increasing the number of steps.

  Further, according to the present invention, since the notch through which the second heat radiation pipe passes is provided in the flange portion for slidably locking the dew prevention pipe, the first and second heat radiation pipes can be simplified by the dew prevention pipe. Can be linked to.

  According to the present invention, since the first and second heat radiating pipes are fixed to the metal plate by the fixing member having thermal conductivity, the heat of the first and second heat radiating pipes is transmitted to the metal plate and high heat radiation efficiency is obtained. Obtainable.

  Further, according to the present invention, the second heat radiating pipe meanders in an S-shape, so that the second heat radiating pipe is provided, for example, extending left and right at the front part of the top surface part, and a part of the heat of the front part of the second heat radiating pipe is a metal plate To the upper part of the storage chamber. Therefore, dew condensation on the upper part of the storage chamber can be prevented.

  Embodiments of the present invention will be described below with reference to the drawings. For convenience of explanation, the same reference numerals are given to the same parts as those in the conventional example shown in FIGS. FIG. 1 is a side sectional view showing a refrigerator according to an embodiment. The refrigerator 1 includes a heat insulating box 4 having an opening at the front. The heat insulating box 4 is integrally provided with a partition wall 5, the refrigerator compartment 2 is provided above the partition wall 5, and the freezer compartment 3 is provided below. The front surface of the refrigerator compartment 2 is opened / closed by a door 2a, and the front surface of the freezer compartment 3 is opened / closed by doors 3a, 3b arranged vertically.

  The outer surface of the heat insulating box 4 is covered with a metal plate 10 (see FIG. 3), and an inner box 14 (see FIG. 6) made of a resin molded product is arranged on the inner surface. A foamed resin is filled between the metal plate 10 and the inner box 14, and the refrigerator compartment 2 and the freezer compartment 3 are insulated from the outside air.

  A compressor 15 that operates the refrigeration cycle is disposed in the lower rear portion of the freezer compartment 3. Cold air passages 21 and 22 are provided at the rear of the refrigerator compartment 2 and the freezer compartment 3. A cooler 16 connected to the compressor 15 is disposed in the cool air passage 22, and a blower 17 is disposed above the cooler 16. The air flowing through the cold air passages 21 and 22 by driving the blower 17 exchanges heat with the cooler 17 and is discharged to the refrigerator compartment 2 and the freezer compartment 3. Thereby, the refrigerator compartment 2 and the freezer compartment 3 are cooled.

  FIG. 2 is a perspective view showing a piping configuration of refrigerant circulating for the operation of the refrigeration cycle. A condenser 8 is connected to the refrigerant outflow side of the compressor 15, and a cooler 16 is connected to the refrigerant inflow side. The condenser 16 and the condenser 8 are connected by a capillary tube 18 via a dryer 19.

  The gas refrigerant compressed to a high temperature and high pressure by the compressor 15 is condensed by the condenser 8. The condensed refrigerant is decompressed by the capillary tube 18, vaporized by the cooler 16, and returned to the compressor 15. Cold air is generated by heat exchange with the cooler 17 on the low temperature side by the operation of the refrigeration cycle, and the condenser 8 on the high temperature side dissipates heat by exchanging heat with the outside air. The dryer 19 removes moisture in the piping.

  The condenser 8 includes a heat radiation pipe 6 and a dew prevention pipe 7. The heat radiating pipe 6 is provided separately, and the heat radiating pipes 6a and 6b are arranged on both side surfaces of the heat insulating box 4, and the heat radiating pipe 6c is arranged on the top surface. The dew condensation prevention pipe 7 is arranged at the front end of the heat insulating box 4. By radiating heat from the dew condensation prevention pipe 7, it is possible to prevent dew condensation due to outside air flowing into the refrigerator compartment 2 and the freezer compartment 3 when the doors 2a, 3a, 3b are opened. A part 7 a of the dew condensation prevention pipe 7 is bent and disposed on the front surface of the partition wall 5.

  As shown in FIG. 3, the heat radiation pipe 6 and the dew prevention pipe 7 are attached to a metal plate 10 that forms the outer surface of the heat insulating box 4. The metal plate 10 is made of an iron plate or the like, and the top and side surfaces of the heat insulating box 4 are formed by bending the metal plate 10 to which the heat radiation pipe 6 and the dew prevention pipe 7 are attached by press working or the like.

  FIG. 4 is a plan view showing the developed metal plate 10 before bending. The metal plate 10 is provided with side portions 10 a and 10 b adjacent to both sides of the top surface portion 10 c that forms the top surface of the heat insulating box 4. The side surface portions 10 a and 10 b form the side surface of the heat insulating box 4 by bending at the fold line 10 d. The side surfaces 10a and 10b are fixed with heat radiation pipes 6a and 6b meandering in the left and right direction (up and down direction of the refrigerator 1) in the figure. A heat radiation pipe 6c meandering in the vertical direction (front-rear direction of the refrigerator 1) in the figure is fixed to the top surface portion 10c.

  As shown in the cross-sectional view of FIG. 7, the heat radiation pipe 6 is fixed in close contact with the metal plate 10 with an adhesive tape 12 made of aluminum. Thereby, the heat of the heat radiating pipe 6 is transmitted to the metal plate 10, and high heat dissipation efficiency is obtained by radiating heat from the entire metal plate 10. The adhesive tape 12 may be any material having high thermal conductivity such as metal, and a fixing member such as an adhesive having high thermal conductivity may be used instead of the adhesive tape 12.

  The dew prevention piping 7 is locked to the end portion on the front side of the metal plate 10. FIG. 6 is a side cross-sectional view showing the upper front of the heat insulating box 4 (part A in FIG. 1). The front end of the metal plate 10 is formed with a flange portion 13 having one end opened by bending. The dew prevention pipe 7 is inserted into the flange portion 13, and is positioned and locked in the front-rear direction so as to be slidable in the direction in which the dew prevention pipe 7 extends. Further, the front end of the inner box 14 is inserted into the flange portion 13, and the inner box 14 abuts on the dew prevention pipe 7, and the movement of the dew prevention pipe 7 in the direction perpendicular to the metal plate 10 is restricted. The dew condensation prevention pipe 7 is intended to raise the temperature on the inner surface side of the heat insulating box 4 and need not be tightly fixed to the metal plate 10.

  FIG. 5 is a plan view showing details of a portion C in FIG. The heat radiation pipe 6a (first heat radiation pipe) disposed on one side surface portion 10a and the heat radiation pipe 6c (second heat radiation pipe) disposed on the top surface portion 10c are connected by a dew prevention pipe 7. Yes. Further, the heat radiation pipe 6 c disposed on the top surface portion 10 c and the heat radiation pipe 6 b (first heat radiation pipe) disposed on the other side surface portion 10 b are connected by a dew prevention pipe 7.

  The flange portion 13 of the top surface portion 10c is provided with two notches 13a on the back side. The heat radiation pipe 6c is connected to the orthogonal dew generation prevention pipe 7 through a notch 13a. Thereby, the dew prevention pipe 7 can be easily connected to the heat radiating pipe 6 c that is in close contact with the metal plate 10.

  As described above, the metal plate 10 to which the heat radiation pipe 6 and the dew prevention pipe 7 are attached is bent at the fold line 10d to form the outer surface of the heat insulating box 4. At this time, the dew prevention pipe 7 is bent together with the metal plate 10, but the heat radiating pipe 6 is not bent. Since the dew condensation prevention pipe 7 is slidable in the flange portion 13, it moves at the time of bending and does not apply a large tensile force. Therefore, it is possible to prevent the heat radiation pipe 6 and the dew prevention pipe 7 from breaking without attaching the heat radiation pipe 6 and the dew prevention pipe 7 to the developed metal plate 10 and increasing the number of steps.

  Further, by providing the heat radiation pipe 6 c on the top surface of the heat insulating box 4, the condenser 8 can obtain a large heat radiation amount. Thereby, about 5% of energy saving is achieved compared with the case where piping for heat dissipation is not provided in the top | upper surface of the heat insulation box 4 (refer FIG. 9).

  Note that a dew prevention pipe 7 is not provided at a part of the front end of the top surface of the heat insulating box 4. However, the heat radiating pipe 6c is not U-shaped, but is formed to meander in a front-back direction in an S-shape. Thereby, the refrigerant | coolant distribution length becomes long and the heat radiation amount increases in the piping 6c for heat radiation. In addition, the heat radiating pipe 6c is provided to extend left and right at the front part of the top surface part 10c, and a part of the heat of the front part D of the heat radiating pipe 6c is released to the upper part of the refrigerator compartment 2 through the metal plate 10. The Therefore, dew condensation on the upper part of the refrigerator compartment 2 can be prevented. The heat radiating pipe 6c may meander in multiple layers in an S shape. Further, the heat radiation pipe 6c may be formed by meandering left and right in an S shape.

  According to the present invention, the condenser can be used in a refrigerator provided on the outer wall.

Side surface sectional drawing which shows the refrigerator of embodiment of this invention The perspective view which shows the piping structure of the refrigerant | coolant of the refrigerator of embodiment of this invention. The perspective view which shows the bent metal plate of the refrigerator of embodiment of this invention The top view which shows the expand | deployed metal plate of the refrigerator of embodiment of this invention The top view which shows the detail of the C section of FIG. Side sectional view showing details of part A in FIG. Sectional drawing which shows the attachment state of piping for heat radiation of the refrigerator of embodiment of this invention The top view which shows the metal plate by which the conventional refrigerator was expand | deployed The top view which shows the metal plate by which the other conventional refrigerator was expand | deployed

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigeration room 3 Freezing room 4 Thermal insulation box 5 Partition wall 6, 6a-6c Heat radiation piping 7 Dew prevention piping 8 Condenser 10 Metal plate 10a, 10b Side surface part 10c Top surface part 10d Fold 12 Adhesive tape 13 Flange part 13a Notch 14 Inner box 15 Compressor 16 Cooler 17 Blower 18 Capillary tube 21, 22 Cold air passage

Claims (4)

  A metal plate having a top surface portion that forms the top surface of the heat insulation box that covers the storage chamber, and a side surface portion that forms a side surface of the heat insulation box body by being bent adjacent to the top surface portion, and a refrigerant flows and freezes The first and second heat radiating pipes and dew condensation preventing pipes that form the high temperature side of the cycle are provided. The refrigerator is configured to dissipate heat, and the dew condensation prevention pipe connects the first and second heat radiation pipes and is attached to the front side of the metal plate to prevent dew condensation at the front of the storage chamber.   A flange portion for slidably locking the dew condensation prevention pipe is formed at the front end of the metal plate by bending the metal plate, and a notch through which the second heat radiation pipe passes is provided in the flange portion. The refrigerator according to claim 1.   The refrigerator according to claim 1 or 2, wherein the first and second heat radiation pipes are fixed to the metal plate by a fixing member having high thermal conductivity.   The refrigerator according to any one of claims 1 to 3, wherein the second heat radiation pipe meanders in an S-shape.

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