JP5343351B2 - refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of preventing dew formation of an opening rim of a storage compartment even if a heat radiation pipe is arranged in one line in a bridge state in a width direction of the refrigerator. <P>SOLUTION: The refrigerator 51 is equipped with the heat radiation pipe 110 provided in a heat radiation side of a refrigerating cycle. The heat radiation pipe 110 can be provided with a dew formation preventing effect by equipping bent parts 111, 112 enhancing flexibility of a portion crossed in one line like a bridge in the width direction of the refrigerator 51, and enhancing adhesiveness with a metal plate 91a and maintaining a heat radiation capacity even though it is one line. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a refrigerator, and more particularly, to a dew condensation prevention structure at the periphery of an opening of a storage room.

  In general, a refrigerator employs a structure in which the periphery of the opening of each storage chamber is heated in order to prevent water vapor in the outside air from condensing and condensing on the periphery of the opening of the storage chamber due to the effect of the cooled internal temperature. ing. In such a heating structure, there has been devised to prevent dew condensation using heat released from a heat radiating pipe provided on the heat radiating side of the cooling cycle without using a dedicated electric heater or the like for preventing dew condensation. Yes.

  FIG. 10 is a diagram showing an arrangement mode of heat radiating pipes in a conventional refrigerator.

  After assembling the inner box 170 made of synthetic resin into the outer box 171 made of steel plate, the bottom plate and the back plate of the outer box 171 are attached, and a foam heat insulating material such as urethane is attached. Is foam-filled inside to form a heat insulating box.

  In this conventional refrigerator 100, the heat radiating pipe 180 is arrange | positioned in the front-surface opening edge periphery of each store room 153-157. The heat radiating pipe 180 is a part of a condenser of a cooling cycle (not shown) in which a compressor, a condenser, a decompressor, and a cooler are connected in a ring shape, and a refrigerant and refrigerating machine oil are enclosed inside. When the gas refrigerant compressed to high temperature and high pressure by the compressor flows into one end of the heat radiating pipe 180, the gas refrigerant that has flowed in dissipates heat while flowing toward the other end of the heat radiating pipe 180, and is liquefied and condensed. Thereby, the opening part periphery of each store room 153,154,155,156,157 is heated, and dew condensation can be prevented without using the electric heater etc. for exclusive use for dew condensation prevention.

  However, in order to dispose one heat radiating pipe 180 at the periphery of the opening of each of the storage chambers 153 to 157, the heat radiating pipe 180 is folded back in a U shape between the storage chambers 153 to 157, and is almost stored in the storage chamber. It will be arrange | positioned in two strips in the full length of width | variety of. If the heat radiating pipes 180 are arranged in two strips in this way, the total length of the heat radiating pipes 180 becomes long, which is a factor that hinders the reduction in the production cost of the refrigerator 100. Therefore, in recent years, a technique for reducing the production cost of the refrigerator by simplifying the arrangement of the heat radiating pipes has been disclosed (for example, see Patent Document 1).

  FIG. 11 is a diagram showing an arrangement mode of the heat radiating pipes disclosed in Patent Document 1. As shown in FIG.

  As shown in FIG. 11, the refrigerator 200 disclosed in Patent Document 1 includes a heat insulating box 231. The inside of the heat insulating box 231 is partitioned into a refrigerator compartment 237, a vegetable compartment 238, and a freezer compartment 239 by a first partition wall 235 and a second partition wall 236. A compressor 251 and a condenser 252 are provided at the bottom of the heat insulating box 231, and a dew proof pipe 253 that functions as the above-described heat radiating pipe 180 is connected to the condenser 252.

Here, the dew proof pipe 253 is arranged in a single line so as to surround three sides of the opening peripheral portion of the vegetable compartment 238 in the front portion of the refrigerator 200. A condensation pipe 254 arranged on the inner surface of the outer box of the heat insulation box 231 is connected downstream of the dew prevention pipe 253, and a capillary tube 255 acting as a decompressor is connected downstream of the condensation pipe 254. Yes. The capillary tube 255 is connected to a cooler 256 provided behind the freezer compartment 239, and the cooler 256 and the compressor 251 are connected by a suction tube 257. As described above, in the refrigerator 200 disclosed in Patent Document 1, since the heat radiating pipes are arranged in a row so as to surround the three sides of the opening edge of the vegetable compartment 238, the arrangement of the heat radiating pipes is simplified, and the refrigerator The production cost can be reduced and the product can be provided at a lower price by the user, and reducing the materials used has the effect of saving resources.
JP 2001-12841 A

  However, when the heat dissipating pipe is arranged in a single line, the absolute amount of heat released from the heat dissipating pipe is lower than that in the case where it is arranged in a double line. There is a problem that the efficiency of heat conduction to the periphery of the opening also decreases.

  FIG. 12 is a diagram illustrating a state in which the heat dissipating pipes are arranged in two strips.

  As shown in FIG. 12, the heat radiating pipe 180 is bridged between the first partition wall 191 and the metal plate 191 a attached to the front surface in two lines in the width direction of the refrigerator. The first partition wall 191 is a partition wall for partitioning the refrigerator compartment and the ice making chamber. Here, the first partition wall 191 will be described. However, the heat radiating pipe 180 is also arranged on the front surface of the other partition walls.

  Here, when the metal plate 191a is attached to the first partition wall 191, the heat conduction efficiency increases as the heat radiating pipe 180 and the metal plate 191a come into close contact with each other. When the heat radiating pipes 180 are arranged in two strips, the left end of the heat radiating pipe 180 becomes a fixed end, and the right end folded back in a U shape becomes a free end. In this case, since the heat radiating pipe 180 is highly flexible, the adhesion between the heat radiating pipe 180 and the metal plate 191a is increased, and the heat conduction efficiency is also increased.

  FIG. 13 is a diagram illustrating a state in which the heat radiating pipes are arranged in a single line.

  As shown in FIG. 13, the heat radiating pipe 180 is bridged in a single line in the width direction of the refrigerator, and both ends of the heat radiating pipe 180 are fixed ends. In this case, since the heat radiating pipe 180 has low flexibility, the adhesion between the heat radiating pipe 180 and the metal plate 191a is lowered, and the heat conduction efficiency is also lowered.

  Thus, when the heat radiating pipes are arranged in one line, the absolute heat quantity released from the heat radiating pipes is lowered as well as the heat conduction efficiency, compared to the case where the heat radiating pipes are arranged in two lines. Therefore, the amount of heat necessary to prevent dew condensation is not released, and water vapor in the outside air may condense and dew on the periphery of the opening of the storage chamber.

  In addition, since both ends of the heat radiating pipe 180 are fixed ends, it is not possible to absorb the dimensional change in the left-right direction compared to the free end. Therefore, the heat radiating pipe may vary due to component variations and component shrinkage due to temperature changes until manufacture, storage, and use. The heat radiation state of 180 was not stabilized, and it was difficult to stabilize the product quality.

  The present invention solves the above-mentioned problem, and even when the heat radiating pipes are arranged in one line, the amount of heat radiated to the heat radiating plate (for example, a metal plate serving as a partition plate) is secured, and the peripheral edge of the opening of the storage chamber An object of the present invention is to provide a refrigerator capable of preventing the dew condensation with high quality.

In order to achieve the above object, a refrigerator according to the present invention has a plurality of storage rooms each provided with a refrigeration room at the top, and a heat radiating pipe provided on the heat radiation side of the cooling cycle at the opening of the storage room. The heat radiating pipe is not provided with the heat radiating pipe at the periphery of the opening of the refrigerating room, and has a partition wall at the lower part of the refrigerating room as a top part, and is bridged in a single line in the width direction of the refrigerator. The uppermost heat radiating pipe is provided with a bent portion having flexibility to function as a play allowance in the left-right direction, and is attached to the front surface of the uppermost heat radiating pipe. In addition to increasing the contact length with the metal plate and increasing the amount of heat transfer to the metal plate, while reducing the cost, even when arranging the radiating pipe in one line, That part is highly flexible Runode, thermal conduction efficiency is to be secured heat radiation amount increases, it becomes possible to prevent dew condensation in the periphery of the opening of the storage compartment.

  As is clear from the above description, according to the refrigerator according to the present invention, even when the heat radiating pipe is arranged in a single line, the portion is highly flexible, so the heat conduction efficiency is also high and the heat radiation amount is secured. It is possible to prevent condensation on the periphery of the opening of the storage chamber.

The invention according to claim 1 is a refrigerator having a plurality of storage rooms provided with a refrigeration room at the uppermost part, and comprising a heat radiation pipe provided on the heat radiation side of the cooling cycle at the opening of the storage room, The heat radiating pipe is not disposed on the periphery of the opening of the refrigeration room, and the partition wall at the lower part of the refrigeration room is used as the uppermost part, and is passed in a bridge in a single line in the width direction of the refrigerator . The uppermost heat radiating pipe is provided with a bent portion having flexibility for functioning as a play allowance in the left-right direction, and improves adhesion with a metal plate attached to the front surface of the uppermost heat radiating pipe. In addition, by increasing the contact length with the metal plate to increase the amount of heat transfer to the metal plate, even when the heat radiating pipes are arranged in a single line, the portion is flexible. The heat transfer efficiency is high. It becomes possible to prevent dew condensation in the periphery of the opening of the storage compartment.

  The invention according to claim 2 is the invention according to claim 1, wherein the heat radiating pipe includes a plurality of protruding bent portions, and stress can be distributed to the plurality of bent portions. Further, the adhesion to the heat radiating plate that makes the heat radiating pipe abut in heat conduction is improved, and it is possible to prevent condensation and improve the heat radiating capacity.

  The invention according to claim 3 is the invention according to claim 1, wherein the heat radiating pipe is provided with the bent portion on a front surface of a partition wall that divides the storage chamber in the left and right directions, and the bent portion is formed in the partition wall. Because it is arranged along the wall, it is possible to prevent condensation without arranging a separate heat radiating pipe for the partition wall, and at the same time, it gives flexibility to the heat radiating pipe that is passed in a cross-linked manner in the width direction. It is possible to have the effects of preventing the condensation and improving the heat dissipation capability.

  The invention according to claim 4 is the invention according to claim 2, wherein the heat radiating pipe is repeatedly provided with a plurality of the bent portions over the entire portion that is bridged in the width direction of the refrigerator. Yes, since the bent part is arranged over the entire part arranged in one line, sufficient flexibility is given and the adhesion to the whole partition plate is further enhanced, and at the same time, the heat radiation pipe is lengthened and the dew condensation prevention effect is also achieved It becomes possible to increase the absolute amount of heat released from the heat radiating pipe.

  The invention according to claim 5 is the invention according to claim 1, further comprising a plurality of storage chambers having different temperatures and a partition wall partitioning the storage chamber, wherein the heat radiating pipe is a single line in the width direction of the refrigerator. Since the part passed in a cross-linked manner is arranged close to the front side of the partition wall toward the low temperature storage room side, heat can be dissipated in accordance with the low temperature part of the front part of the partition wall, and the temperature can be efficiently increased. It can be raised to prevent condensation.

  According to a sixth aspect of the present invention, in the first aspect of the present invention, the plurality of storage chambers, a door that can be opened and closed in each of the storage chambers, and a partition wall that partitions the plurality of storage chambers and the partition wall Is provided with door opening / closing detection means for detecting the open / closed state of the door, and the bent portion is disposed around the door opening / closing detection means. Since it can be heated, it can have an action of preventing local dew condensation.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
First, the structure of the refrigerator 51 in Embodiment 1 is demonstrated using FIGS. 1-5.

  FIG. 1 is a front view of the refrigerator according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the refrigerator 51 is a refrigerator including a double door and includes a plurality of compartments in a heat insulating box 52. That is, the refrigerator compartment 53, the ice making room 54, the switching room 55, the vegetable room 56, and the freezer room 57 are provided as storage rooms from the upper part. The switching chamber 55 is provided along with the ice making chamber 54, and can change the temperature in the warehouse. The heat insulating box 52 is a heat insulating material in which a foam heat insulating material 72 such as urethane is filled in a space formed by an inner box 70 obtained by vacuum molding a resin body such as ABS and an outer box 71 using a metal material such as a pre-coated steel plate. It consists of walls.

  A heat insulating door filled with a foam heat insulating material such as urethane is provided at the opening of each storage chamber. Specifically, the refrigerator compartment 53 is provided with a left door 60a and a right door 60b that close the opening of the heat insulating box 52 so as to be opened and closed. The ice making chamber 54, the switching chamber 55, the vegetable chamber 56, and the freezing chamber 57 are provided with a drawer-type door 61, a door 62, a door 63, and a door 64, respectively.

  A cooler, a fan, a damper, an air passage, and the like are provided on the rear surface of the refrigerator, and a compressor is installed at the lower part of the main body of the refrigerator 51. The cooling air is distributed and sent from each cooler so that each storage chamber is cooled to a predetermined temperature.

  FIG. 2 (A) is a diagram showing an arrangement mode of the heat radiating pipe 110 in the first embodiment of the present invention.

  As shown in FIG. 2A, the inner box 70 is attached with a first partition wall 91, a second partition wall 92, a third partition wall 93, and a fourth partition wall 94. It has been. Each partition is formed by these partition walls. The heat radiating pipe 110 is a pipe provided on the heat radiating side of the cooling cycle. Generally, a pipe having an outer diameter of 4 to 4.76 mm using a metal raw material such as copper, aluminum, or iron is used. The heat radiating pipe 110 is a pipe that liquefies and condenses the refrigerant. If the volume in the pipe is large, a large amount of refrigerant sealed in the cooling cycle is required, resulting in an increase in manufacturing cost. Moreover, if the tube diameter is too small, there is a problem that the pressure loss increases and the efficiency of the cooling cycle decreases.

  Here, a heat radiating pipe 110 is arranged at the periphery of the opening of each of the ice making chamber 54, the switching chamber 55, the vegetable chamber 56, and the freezing chamber 57. On the other hand, the uppermost refrigerating chamber 53 is maintained at a relatively high temperature compared to other storage chambers, that is, a temperature at which the difference from the outside air is relatively small. Therefore, the heat radiating pipe 110 is not disposed on the periphery of the opening of the refrigerator compartment 53 (excluding the partition wall between the storage compartments).

  Similarly, the peripheral edge of the opening of the vegetable compartment 56 (except for the partition wall between the storage compartments) having a relatively high temperature setting can be prevented from dew condensation without arranging the heat radiating pipe 110. Since the ice making chamber 54 and the freezing chamber 57 in the freezing temperature zone are vertically surrounded by a low-temperature cooler chamber, the temperature is too low under low outside air conditions, and temperature compensation by a heater or the like is necessary. For this reason, a heat radiating pipe 110 is disposed around the periphery of the opening of the vegetable compartment 56 to devise a method for reducing the heater heating amount.

  FIG. 2B is a diagram for explaining the cooling cycle in the first embodiment of the present invention.

  The cooling cycle in the first embodiment is the same as the conventional one. That is, as shown in FIG. 2B, the gas refrigerant compressed by the compressor 81 is liquefied and condensed through the condenser 82 while flowing in the direction of the arrow in the figure through the condenser 82, and releases heat. To do. At this time, the temperature of the heat radiating pipe 110 rises to about 40 ° C. under the condition of the outside air temperature of 30 ° C., for example. The refrigerant liquefied and condensed by passing through the heat radiating pipe 110 is vaporized by the cooler 83 and sent to the compressor 81. The opening periphery of each storage chamber is heated by the heat released in this cooling cycle.

  In this way, it is possible to prevent condensation at the periphery of the opening of the storage chamber using heat released in the cooling cycle without using a dedicated electric heater or the like for preventing condensation. As a result, dew condensation caused by the condensation of water vapor is eliminated, and it is possible to prevent appearance discomfort and dirt, rusting of peripheral members, and the like.

  FIG. 3 is a diagram showing an arrangement mode of the heat radiating pipe 110 according to Embodiment 1 of the present invention.

  As shown in FIG. 3, the heat radiating pipe 110 is attached to the inner box 70 first. Then, the box is assembled such that the inner box 170 is inserted into the outer box 171. After this, the bottom and back plates of the outer box 171 are attached, respectively, and foam insulation such as urethane is filled into the inside of the box to form a heat insulation box.

  Here, in this Embodiment 1, since the heat radiating pipe 110 is not arrange | positioned in the opening part periphery (except for a partition wall) of the refrigerator compartment 53, the full length of the heat radiating pipe 110 becomes short, and the production cost of the refrigerator 51 is reduced. Can be reduced. However, in this case, the heat radiating pipe 110 attached to the front surface of the first partition wall 91 is disposed in a single line. Therefore, compared with the case where it arrange | positions in two strips, there is a problem that not only the absolute amount of heat released from the heat radiating pipe 110 is lowered, but also the heat conduction efficiency from the heat radiating pipe 110 to the periphery of the opening of the storage chamber is lowered. . Therefore, in the first embodiment, the shape of the heat radiating pipe 110 is devised as described below.

  FIG. 4 is a diagram showing the shape of the heat radiating pipe 110 according to Embodiment 1 of the present invention.

  The heat radiating pipe 110 includes bent portions 111 and 112 that increase the flexibility of a portion that is bridged in a single line in the width direction of the refrigerator 51. That is, the uppermost part of the heat radiating pipe 110 is a part attached to the front surface of the first partition wall 91, and the heat radiating pipe 110 is passed in a single bridge in the width direction of the refrigerator 51 as shown in FIG. 4. ing. Therefore, bent portions 111 and 112 from which the heat radiating pipe 110 protrudes are provided at the uppermost portion.

  The part attached to the front surface of the other partition walls (second partition wall 92, third partition wall 93, and fourth partition wall 94) is folded into two pieces by radiating pipe 110. Since the two-row portion is highly flexible, there is no bent portion.

  FIG. 5a is a diagram showing an attachment mode of the heat radiating pipe 110 in Embodiment 1 of the present invention, and FIG. 5b is a cross-sectional view of the main part of the heat radiating pipe attached.

  As shown in FIGS. 5a and 5b, the uppermost portion of the heat radiating pipe 110 is pressed against the metal plate 91a from the back surface by the backup material 91b between the first partition wall 91 and the metal plate 91a attached to the front surface thereof. Arranged to be. The backup material 91 is preferably an elastic and heat insulating material, and polystyrene foam is mainly used. In addition, although it demonstrates paying attention to the 1st partition wall 91 here, the heat radiating pipe 110 is similarly arrange | positioned also on the front surface of the other partition wall.

  Here, since the uppermost part of the heat radiating pipe 110 is a single line, both ends thereof are fixed ends, but two bent parts 111 and 112 are provided on the uppermost part of the heat radiating pipe 110. The two bent portions 111 and 112 expand and contract as indicated by arrows in the drawing, and function as play allowances for increasing the flexibility of the heat radiating pipe 110. Thereby, the adhesiveness of the heat radiating pipe 110 and the metal plate 91a becomes high, and the heat conduction efficiency also becomes high. In addition, since the contact length between the heat radiating pipe 110 and the metal plate 91a is increased only at the bent portion, the amount of heat transfer is increased.

  In addition, even if one bending part 111 or 112 has the effect which improves adhesiveness, it is possible to enlarge a contact degree further as a line contact by using two places, and can expect the significant improvement effect. Furthermore, by arranging the bent portion 111 or 112 in the vicinity of the assembly portion with the second partition wall 93, it is possible to improve the degree of adhesion with respect to a portion where the temperature tends to decrease.

  In particular, the portions attached to the front surfaces of the third partition wall 93 and the fourth partition wall 94 are two strips in which the heat radiating pipe 110 protrudes from both end portions and is folded back at the center portion. By providing the free end of the heat radiating pipe at the part and improving the adhesion with the central part of the metal plate, it is possible to make condensation less likely to occur.

  In addition, the joining portion between the second partition wall 92 and the third partition wall 93 is a combination of two metal plates in the vertical and horizontal directions, and flatness is difficult to come out. By arranging two free ends at this site, the degree of adhesion with the metal plate can be improved.

  As described above, according to the first embodiment, even when the heat dissipating pipes are arranged in a single line, since the portion becomes highly flexible, the heat conduction efficiency is also increased, and dew condensation on the periphery of the opening of the storage chamber is prevented. It becomes possible to prevent. Moreover, it becomes possible to improve the flexibility of the part arrange | positioned in a single line | wire by the easy method of bending a heat radiating pipe to protrusion shape. Further, since two bent portions are provided, it is possible to disperse stress in the two bent portions.

  Although the compressor is provided at the lower part of the main body, when the compressor is provided at the upper part of the main body, the upper part of the outer box of the refrigerator rises relatively due to heat release from the compressor and the hottest heat radiating pipe immediately after discharge. Even if the heat radiating pipe is removed, there is an effect that it is difficult to condense.

  Although the heat radiating pipe 110 is connected via the condenser 82, another heat radiating pipe or another condenser may be provided before or after the heat radiating pipe 110, or the heat radiating pipe 110 may be connected to the condenser via the heat radiating pipe 110. 82 may be connected. In particular, if the heat radiating pipe 110 is arranged upstream of the refrigerant flow, the heat radiation amount is increased by the relatively high temperature gas refrigerant, but the load may be increased during high-load operation. Conversely, if it is arranged downstream of the refrigerant flow, it is effective to reduce the load during high-load operation. However, since it may be difficult to take a large amount of heat because it is a subcool region, the heat radiation pipe 110 is arranged in the middle part. It is desirable to do.

  Furthermore, when using a relatively inexpensive steel pipe to reduce the manufacturing cost among metal materials, the heat radiating pipe 110 is harder than copper or the like, so that the effect of increasing flexibility is great, preventing condensation. It is effective for.

(Embodiment 2)
The refrigerator 51 in Embodiment 2 of the present invention is the same as the refrigerator 51 in Embodiment 1 except that the shape of the heat radiating pipe is different. Hereinafter, the configuration of the refrigerator 51 according to the second embodiment will be described mainly with respect to differences from the first embodiment with reference to FIGS. 6 and 7.

  FIG. 6 is a diagram showing the shape of the heat radiating pipe 120 according to Embodiment 2 of the present invention.

  The heat radiating pipe 120 according to the second embodiment also includes a bent portion that increases the flexibility of the portion that is passed in a single bridge in the width direction of the refrigerator 51. That is, the uppermost part of the heat radiating pipe 120 is a portion attached to the front surface of the first partition wall 91, and the heat radiating pipe 120 is passed in a single bridge in the width direction of the refrigerator 51 as shown in FIG. 6. ing. Therefore, a bent portion 121 in which the heat radiating pipe 120 is formed in a U shape is provided at the uppermost portion.

  The part attached to the front surface of the other partition walls (the second partition wall 92, the third partition wall 93, and the fourth partition wall 94) is formed by folding the heat radiating pipe 120 into two strips. Since the two-row portion is highly flexible, there is no bent portion.

  FIG. 7 is a diagram illustrating a manner of attaching the heat radiating pipe 120 according to Embodiment 2 of the present invention.

  As shown in FIG. 7, the uppermost portion of the heat radiating pipe 120 is disposed between the first partition wall 91 and a metal plate 91a attached to the front surface thereof. The bent portion 121 provided at the uppermost portion of the heat radiating pipe 120 is disposed between the second partition wall 92 and the metal plate 92a attached to the front surface thereof. The point that the heat radiating pipe 120 is also arranged on the front surface of other partition walls is the same as that of the first embodiment.

  This will be described in terms of the application to the storage room layout of the refrigerator. The second partition wall 92 is positioned as a dividing wall that divides the storage room into the left and right. For example, in the storage room layout often used in recent refrigerators. One of the left and right storage chambers (the narrower one) becomes the ice making and ice storage chamber 92b, and the other (the wider one) becomes the multipurpose chamber 92c such as the temperature switching chamber, and the bent portion 121 divides the two chambers. It will be thermally conductively disposed on the metal plate 92a that will be the front surface of the dividing wall.

  Here, since the uppermost part of the heat radiating pipe 120 is a single line, both ends thereof are fixed ends, but a bent part 121 is provided at the uppermost part of the heat radiating pipe 120. The bent portion 121 expands and contracts as indicated by an arrow in the figure, and functions as a play allowance for increasing the flexibility of the heat radiating pipe 120. Thereby, the adhesiveness of the heat radiating pipe 120 and the metal plates 91a and 92a is increased, and the heat conduction efficiency is also increased.

  As described above, according to the second embodiment, even when the heat dissipating pipes are arranged in a single line, the portion is highly flexible, so that the heat conduction efficiency is also increased, and the dew condensation on the periphery of the opening of the storage chamber is reduced. It becomes possible to prevent. Further, by bending the heat radiating pipe in a U-shape and extending the bent portion 121 to the front surface of the second partition wall 92 serving as a dividing wall between the left and right storage chambers, a single line is formed in a rational manner. It is possible to increase the flexibility of the portion disposed in the wall, and further, since the bent portion is disposed along the second partition wall 92, the condensation is not formed even if a separate heat radiating pipe is disposed on the partition wall. The effect of two birds with one stone that can be prevented can be obtained.

(Embodiment 3)
The refrigerator 51 in the third embodiment of the present invention is the same as the refrigerator 51 in the first embodiment except that the shape of the heat radiating pipe is different. Hereinafter, the configuration of the refrigerator 51 according to the third embodiment will be described mainly with respect to differences from the first embodiment with reference to FIGS. 8 and 9.

  FIG. 8 is a diagram showing the shape of the heat radiating pipe 130 according to Embodiment 3 of the present invention.

  The heat radiating pipe 130 in the third embodiment also includes a bent portion that increases the flexibility of a portion that is passed in a cross-linked manner in the width direction of the refrigerator 51. In other words, the uppermost part of the heat radiating pipe 130 is a part attached to the front surface of the first partition wall 91, and the heat radiating pipe 130 is passed in a single bridge in the width direction of the refrigerator 51 as shown in FIG. ing. Therefore, a plurality of bent portions 131 are repeatedly provided over the entire uppermost portion.

  The part attached to the front surface of the other partition walls (the second partition wall 92, the third partition wall 93, and the fourth partition wall 94) is formed by folding the heat radiation pipe 130 into two strips. Since the two-row portion is highly flexible, there is no bent portion.

  FIG. 9a is a diagram showing a mounting manner of the heat radiating pipe 130 in Embodiment 3 of the present invention, and FIG. 9b is an enlarged view of a main part showing a mounting manner of the heat radiating pipe.

  9a and 9b, the uppermost portion of the heat radiating pipe 130 is disposed between the first partition wall 91 and a metal plate 91a attached to the front surface thereof. The point that the heat radiating pipe 130 is also arranged on the front surface of other partition walls is the same as that of the first embodiment.

  Here, since the uppermost part of the heat radiating pipe 130 is a single line, both ends thereof are fixed ends, but the bent part 131 is provided over the entire uppermost part of the heat radiating pipe 130. The bent portion 131 expands and contracts as indicated by an arrow in the figure, and functions as a play allowance for increasing the flexibility of the heat radiating pipe 130. Thereby, the adhesiveness of the heat radiating pipe 130 and the metal plate 91a becomes high, and the heat conduction efficiency also becomes high.

  As described above, according to the third embodiment, even when the heat dissipating pipes are arranged in a single line, the portion is highly flexible, so that the heat conduction efficiency is also increased, and the dew condensation on the periphery of the opening of the storage chamber is reduced. It becomes possible to prevent. In addition, it is possible to increase the flexibility of the portions arranged in a single line by an easy method of bending the heat radiating pipe into a corrugated shape. Furthermore, since a plurality of bent portions are arranged over the entire portion arranged in one line, the heat radiating pipe becomes longer, and the absolute amount of heat released from the heat radiating pipe can be increased.

  In the above description, the height of the bent portion is not particularly mentioned. However, the height of the bent portion is not particularly limited as long as it does not cause inconvenience when the heat radiating pipe is attached, and is particularly limited. is not. For example, it is preferable that the height of the bent portion in the first or third embodiment is equal to or less than the thickness of the first partition wall 91. In addition, the height of the bent portion in the second embodiment is preferably equal to or lower than the height of the second partition wall 92.

  In the above description, the bent portion is provided at the uppermost portion of the heat radiating pipe, but the position where the bent portion is provided is not limited to this. That is, the same effect can be acquired if the heat radiating pipe is a portion that is provided in a single bridge in the width direction of the refrigerator.

  In addition, the metal plate of the partition wall where the door hinge member is provided is thicker than other metal plates, and the flange part for increasing the strength is large. This is particularly effective when the heat-dissipating pipe is passed in a single-bridged form to the easy part.

  Although not mentioned in the above description, when a structure is present in a member to which the heat radiating pipe is attached, it is preferable to provide a bent portion at a position corresponding to the structure. For example, when the door switch 60c, which is a door opening / closing detection means for detecting the opening / closing of the left door 60a and the right door 60b, is on the front surface of the first partition wall 91, a bent portion is provided at a position corresponding to the door switch 60c. . In this way, even if a heat radiating pipe is attached to the front surface of the first partition wall 91, the door switch 60c can be avoided.

  In addition, the part where the structure is present has a relatively low heat insulating property, such as a locally thin wall, and is likely to condense, so it is possible to suppress condensation by providing a heat radiating pipe around this area. Is possible. That is, since the mounting part of the door switch 60c, which is less thermally insulated than the surroundings, can be sufficiently heated by the heat radiating pipe, it has a close contact effect in the pipe width direction by providing flexibility by wrapping the heat radiating pipe while preventing local condensation. be able to.

  In the first embodiment, as shown in FIG. 4, the heat radiating pipe 110 is provided with a rising portion 113 at a position corresponding to the second partition wall 92, and also in the third embodiment, as shown in FIG. 8. The rising portion 132 is provided in the heat radiating pipe 130 at a position corresponding to the second partition wall 92. On the other hand, in the second embodiment, since the bent portion 121 is provided at a position corresponding to the second partition wall 92, such a rising shape is unnecessary.

  In addition, when the upper and lower storage chamber temperatures of the partition wall are different, it is possible to efficiently suppress dew condensation by arranging the heat radiating pipe close to the storage chamber on the relatively low temperature side of the partition wall. . For example, when the refrigerator compartment 53 is provided at the upper part of the first partition wall 91 and the ice making chamber 54 is provided at the lower part, the main line portion of the heat radiating pipe 110 is shifted and arranged downward on the low temperature chamber side of the first partition wall 91. The place where the temperature of the first partition wall 91 is likely to decrease and condensation is likely to be heated.

  INDUSTRIAL APPLICABILITY The present invention can be applied to refrigerator applications that require prevention of dew condensation at the periphery of the opening of the storage room even when the heat radiating pipes are arranged in a single line.

Front view of the refrigerator in Embodiment 1 of the present invention (A) The figure which shows the arrangement | positioning aspect of the heat radiating pipe in Embodiment 1 of this invention (B) The figure for demonstrating the cooling cycle in Embodiment 1 of this invention The figure which shows the arrangement | positioning aspect of the heat radiating pipe in Embodiment 1 of this invention The figure which shows the shape of the heat radiating pipe in Embodiment 1 of this invention The figure which shows the attachment aspect of the heat radiating pipe in Embodiment 1 of this invention Cross-sectional view of the main part of the installation of the heat radiating pipe according to Embodiment 1 of the present invention The figure which shows the shape of the heat radiating pipe in Embodiment 2 of this invention The figure which shows the attachment aspect of the heat radiating pipe in Embodiment 2 of this invention The figure which shows the shape of the heat radiating pipe in Embodiment 3 of this invention The figure which shows the attachment aspect of the heat radiating pipe in Embodiment 3 of this invention The principal part enlarged view which shows the attachment aspect of the heat radiating pipe in Embodiment 3 of this invention The figure which shows the arrangement | positioning aspect of the heat radiating pipe in the conventional refrigerator The figure which shows the arrangement | positioning aspect of the heat radiating pipe disclosed by patent document 1 The figure which shows a mode that the heat-dissipation pipe is arranged in two strips The figure which shows a mode that the heat dissipation pipe is arranged in one line.

Explanation of symbols

51 Refrigerator 52 Thermal insulation box 53 Refrigerated room (storage room)
54 Ice making room (storage room)
55 Switching room (storage room)
56 Vegetable room (storage room)
57 Freezer room (storage room)
60a Left door 60b Right door 60c Door switch (door open / close detection means)
61, 62, 63, 64 Door 70 Inner box 71 Outer box 72 Foam insulation 81 Compressor 82 Condenser 83 Cooler 91 First partition wall 92 Second partition wall 93 Third partition wall 94 Fourth partition Wall 110 Heat radiating pipe 111, 112 Bent part 120 Heat radiating pipe 121 Bent part 130 Heat radiating pipe 131 Bent part

Claims (6)

A refrigerator having a plurality of storage chambers with a refrigerator compartment at the top, and having a heat radiation pipe provided on the heat radiation side of the cooling cycle at the opening of the storage chamber, the heat radiation pipe of the refrigerator compartment the opening portion without disposing the radiating pipe, the refrigerating compartment lower portion of the partition wall as the top, intended to be passed to the cross-shaped in Article in the width direction of the refrigerator, the top of the radiator pipe, left and right Arranged with a bent portion having flexibility to function as a play allowance in the direction, improving the adhesion with the metal plate attached to the front surface of the uppermost heat radiating pipe, and the contact length with the metal plate A refrigerator characterized by increasing the heat transfer amount to the metal plate .   The refrigerator according to claim 1, wherein the heat radiating pipe includes a plurality of protruding bent portions.   The refrigerator according to claim 1, wherein the heat radiating pipe includes the bent portion on a front surface of a partition wall that divides the storage chamber into left and right.   The refrigerator according to claim 2, wherein the heat radiating pipe repeatedly includes a plurality of the bent portions over the entire portion that is bridged in a single line in the width direction of the refrigerator.   A plurality of storage chambers having different temperatures and a partition wall partitioning the storage chamber, wherein the heat radiating pipe has a relatively low temperature on the front surface of the partition wall at a portion that is bridged in the width direction of the refrigerator. The refrigerator according to claim 1, wherein the refrigerator is arranged close to the storage room side.   A plurality of storage chambers, doors that can be opened and closed in each storage chamber, a partition wall that divides the plurality of storage chambers, and a door open / close detection means that detects an open / closed state of the door are provided in the partition wall, and the bending The refrigerator according to claim 1, wherein the portion is disposed around the door opening / closing detection means.

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