JPWO2014112010A1 - refrigerator - Google Patents

Abstract

An outer box constituting the outside of the refrigerator main body and an inner side of the outer box, an upper inner box (5a), a lower inner box (5b), and an upper inner box (5a) and a lower inner box An inner box (5) having a front plate part (5c) connecting (5b), and a foam heat insulating material filled between the outer box and the inner box (5). Moreover, it is attached to the back surface of the upper inner box (5a) so as to be positioned below the cooler, and the upper inner box (5a) and the lower inner box. A cooling chamber case (14) having a plurality of duct members (15, 16, 17) connecting the box (5b). The cooling chamber case (14) has a plurality of duct members (15, 16, 17) at least on both sides on the rear side of the cooling chamber case (14) and on the front between the both sides. (15, 16, 17) is configured to connect and fix the rear portion of the upper inner box (5a) and the rear portion of the lower inner box (5b).

Description

  The present invention relates to a refrigerator, and more particularly to a main body configuration of the refrigerator.

  The refrigerator main body of the conventional refrigerator is comprised from the inner box, the outer box, and the foam heat insulating material with which both were filled. The inner box is made of resin and has a refrigerator compartment, a freezer compartment and the like formed therein. The outer box covers the outer periphery of the inner box and is made of a thin metal plate.

  As an example, there is a refrigerator in which an inner box is integrally formed with a partition wall portion that divides the interior of the inner box up and down, thereby forming an upper inner box serving as a freezer compartment and a lower inner box serving as a refrigerator compartment. In this example, after a duct and a dew receiving tray having a water receiving function are fitted in the rear part of the upper inner box and the lower inner box, foam insulation is provided between the upper inner box, the lower inner box, and the outer box. The material is filled (see, for example, Patent Document 1).

  FIG. 14 is a side view showing a cross-sectional configuration of a conventional refrigerator 100, and FIG. 15 is a perspective view showing the internal configuration of the refrigerator 100 as seen from the back.

  The refrigerator 100 includes an inner box 103. The inner box 103 integrally has an upper inner box 101 and a lower inner box 102. A dew tray 105 is inserted into a partition wall 104 that integrally connects the upper inner box 101 and the lower inner box 102. The upper inner box 101 and the lower inner box 102 in a state where the dew tray 105 is inserted are stored in the outer box 106. A foam heat insulating material is filled and solidified between the outer box 106 and the inner box 103 to form a refrigerator main body.

  As shown in FIG. 15, the dew receiving tray 105 is formed with a cold air recirculation passage 106 and a cold air passage 107. By inserting the dew tray 105, the reflux passage 106 is connected to the cold air inlet 108 and the cold air inlet 111, and the cold passage 107 is connected to the cold air outlet 109 and the cold air outlet 110.

  According to such a conventional configuration, there is no need to attach a partition plate that partitions the inner box 103 into a freezer compartment and a refrigerator compartment, and there is an advantage that productivity is improved. However, since the dew tray 105 is located in the partition wall 104 between the upper inner box 101 and the lower inner box 103, the heat insulation between the upper inner box 101 and the lower inner box 102 is poor. There is.

  The portions of the dew tray 105 other than the reflux passage 106 and the cold air passage 107 are made of foamed polystyrene. However, this polystyrene foam has poor heat insulation properties compared to a foam heat insulating material such as urethane foam filled between the upper inner box 101 and the lower inner box 102 and the outer box 106. Therefore, in the part in which the dew tray 105 is located in the partition wall 104, there is a possibility that the heat insulating property is deteriorated. Due to the deterioration of the heat insulating property, the heat insulating property between the upper inner box 101 and the lower inner box 102 is lowered, and heat transfer occurs from the lower inner box 102 serving as the refrigerator compartment to the upper inner box 101 serving as the freezer compartment. . Since electric power for cooling the temperature of the freezer compartment that rises due to this heat transfer to a predetermined temperature is required, power consumption increases. This increase in power consumption is a major issue, even if it is slight, in recent years as power conditions deteriorate.

JP-A-3-255865

  This invention is made | formed in view of such a point, and provides the refrigerator which can suppress power consumption, without reducing the productivity improvement effect.

  The refrigerator of the present invention has an outer box that constitutes the outside of the refrigerator main body, an upper inner box, a lower inner box, and a front plate portion that connects the upper inner box and the lower inner box. An inner box and a foam heat insulating material filled between the outer box and the inner box are provided. Also, a cooler disposed on the back surface of the upper inner box, and a plurality of duct members that are attached to the rear surface of the upper inner box so as to be positioned below the cooler and that connect the upper inner box and the lower inner box A cooling chamber case. The cooling chamber case has a plurality of duct members at least on both sides on the rear side of the cooling chamber case and on the front between the both sides, and the plurality of duct members include a rear portion of the upper inner box and a rear portion of the lower inner box. Are connected and fixed.

  With such a configuration, it is not necessary to separately incorporate a partition plate for partitioning the refrigerator compartment and the freezer compartment into the inner box, and productivity can be improved. Moreover, since the upper inner box and the lower inner box are connected not only to the front plate portion but also to a plurality of duct members at three locations, the rigidity can be improved in a balanced manner. Therefore, the movement of the upper inner box and lower inner box in the production process can be performed smoothly without causing torsional damage of the front plate between the upper inner box and lower inner box, thereby further improving productivity. Can be planned. Further, it is possible to prevent quality deterioration and yield reduction due to breakage of the front plate portion. Further, only a plurality of duct members are located between the upper inner box and the lower inner box, and in other parts, that is, in the entire area between the upper inner box and the lower inner box, It has a configuration filled with highly heat-insulating foam insulation. As a result, the heat insulation between the upper inner box and the lower inner box becomes good, and heat transfer from one to the other of the upper inner box and the lower inner box is suppressed, and power consumption for cooling is reduced. Can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, while maintaining and improving the productivity improvement and the damage prevention effect of an inner box, reduction of power consumption can be aimed at and the refrigerator with high energy saving property can be provided.

FIG. 1 is a front view of the refrigerator in the embodiment of the present invention. FIG. 2 is a front view showing an internal configuration of the refrigerator in the embodiment of the present invention. FIG. 3 is a side view showing the internal configuration of the refrigerator according to the embodiment of the present invention. FIG. 4 is a top view showing the internal structure of the refrigerator in the embodiment of the present invention. FIG. 5 is a front view showing a flow of cold air in the refrigerator in the embodiment of the present invention. FIG. 6 is a perspective view showing the configuration of the refrigerator main body of the refrigerator in the embodiment of the present invention. FIG. 7 is a perspective view of the inner box of the refrigerator according to the embodiment of the present invention as seen from the back side. FIG. 8 is an enlarged perspective view of a main part of FIG. FIG. 9 is a perspective view of the refrigerator compartment case of the refrigerator according to the embodiment of the present invention as viewed from above. FIG. 10 is a perspective view of the refrigerator compartment case of the refrigerator according to the embodiment of the present invention as seen from the back side. FIG. 11 is an enlarged view showing a cross-sectional configuration of the connecting portion of the upper inner box and the lower inner box of the refrigerator according to the embodiment of the present invention using a duct member. FIG. 12 is an explanatory diagram when filling and foaming a foam heat insulating material between the upper inner box and the lower inner box and the outer box of the refrigerator in the embodiment of the present invention. FIG. 13 is an enlarged view showing a cross-sectional configuration of a connecting portion by a duct member in a part different from FIG. 11 of the upper inner box and the lower inner box of the refrigerator in the embodiment of the present invention. FIG. 14 is a side view showing a cross-sectional configuration of a conventional refrigerator. FIG. 15 is a perspective view showing the internal configuration of a conventional refrigerator as seen from the back.

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

  FIG. 1 is a front view of a refrigerator 50 according to an embodiment of the present invention, FIG. 2 is a front view showing the internal configuration of the refrigerator 50, and FIG. 3 is a side view showing the internal configuration of the refrigerator 50. 4 is a view seen from above, showing the internal configuration of the refrigerator 50, and FIG. 5 is a front view showing the flow of cool air in the refrigerator 50. FIG. FIG. 6 is a perspective view showing the configuration of the refrigerator main body of the refrigerator 50 in the embodiment of the present invention, and FIG. 7 is a perspective view of the inner box 5 of the refrigerator 50 as viewed from the back side. 8 is an enlarged perspective view of the main part of FIG. 7, and FIG. 9 is a perspective view of the refrigerator compartment case of the refrigerator 50 as viewed from above. FIG. 10 is a perspective view of the refrigerator compartment case of the refrigerator 50 according to the embodiment of the present invention as viewed from the back side, and FIG. 11 is a view of the upper inner box and the lower inner box of the refrigerator 50 depending on the duct members. It is an enlarged view which shows the cross-sectional structure of a connection part. Moreover, FIG. 12 is explanatory drawing when a foaming heat insulating material is filled and foamed between the upper and lower inner boxes and the lower inner box and the outer box of the refrigerator 50 in the embodiment of the present invention, and FIG. It is an enlarged view which shows the cross-sectional structure of the connection part by the duct member in a part different from FIG. 11 of 50 upper inner boxes and lower inner boxes.

  The refrigerator 50 according to the present embodiment is a top freezer type refrigerator having a freezer compartment 2 at the top of the refrigerator body 1 and a refrigerator compartment 3 at the bottom. As shown in FIG. 3, the refrigerator body 1 includes a metal (for example, iron plate) outer box 4 that opens forward, a hard resin (for example, ABS) inner box 5, and the outer box 4 and the inner box 5. And a hard foam heat insulating material 6 (for example, urethane foam) filled with foam.

  Moreover, the freezer compartment 2 of the refrigerator main body 1 and the front surface of the refrigerator compartment 3 are configured to be openable and closable by rotatable doors 7 and 8 having heat insulation properties by the same structure as the refrigerator main body 1. The freezer compartment 2 is set to a temperature of about −20 ° C., and the refrigerator compartment 3 is set to a temperature at which food is not frozen, usually about 1 ° C. to 5 ° C. Since the temperature difference between the two chambers is large, the heat insulation between these two chambers has a great influence on power consumption reduction.

  A cooling chamber 9 is provided on the back surface of the freezer compartment 2 of the refrigerator body 1. The cooling chamber 9 is provided with a cooler 10 that generates cool air and a blower fan 11 that supplies the cool air to each chamber. A compressor 12 is provided at the back of the main body lower surface of the refrigerator main body 1. A condenser, a heat radiating pipe, a capillary tube, and a cooler 10 are sequentially connected in an annular shape to form a refrigeration cycle. A refrigerant is sealed in the pipeline of the refrigeration cycle, and a cooling operation is performed.

  As shown in FIG. 7, the inner box 5 of the refrigerator main body 1 is formed by integrally forming an upper inner box 5a constituting the freezer compartment 2 and a lower inner box 5b constituting the refrigerator compartment 3 by vacuum forming. Has been. That is, the inner box 5 is an integral component in which the upper inner box 5a and the lower inner box 5b are connected by the front plate portion 5c on the front surface thereof.

  As shown in FIGS. 7 and 8, the inner box 5 has a part of the cooling chamber 9 on the back side of the upper inner box 5a opposite to the front side where the front plate part 5c is provided. The cooling chamber case 14 which comprises is attached. Furthermore, cylindrical duct members 15, 16, and 17 provided in the cooling chamber case 14 are attached to the back side of the lower inner box 5b, and the back parts of the upper inner box 5a and the lower inner box 5b are connected to each other. Has been.

  The connection configuration of the upper inner box 5a and the lower inner box 5b by the duct members 15, 16, and 17 will be described in more detail with reference to FIGS.

  As shown in FIGS. 9 and 10, the cooling chamber case 14 is formed in a substantially square dish shape so as to cover the lower opening of the cooling chamber 9 on the back surface of the freezing chamber 2. Duct members 15 and 16 are integrally formed on both sides of the back wall of the cooling chamber case 14, and a duct member 17 is integrally formed at a substantially central position between the duct members 15 and 16. At the lower part of each duct member 15, 16, 17, a flange portion 18 and a connecting cylinder portion 19 (see FIGS. 11 and 12) protruding from the flange portion 18 are formed. Furthermore, the locking pieces 21 having the locking holes 20 are formed in the flange portions 18 of the duct members 15 and 16 on both sides and the substantial center of the back wall of the cooling chamber case 14 (three places in total). It is integrally formed.

  Further, in the substantially central portion on the back side of the lower inner box 5b, as shown in FIGS. 5 to 8, a cold air duct 22 for supplying cold air into the lower inner box 5b sandwiches the cold air duct 22 therebetween. Cold air return ducts 23 and 24 for returning the cold air in the lower inner box 5b to the cooling chamber 9 are provided at the upper portions on both sides. The cold air duct 22 and the cold air return ducts 23 and 24 are opened on the upper surface of the lower inner box 5b, respectively, and constitute a connection port 25 (see FIGS. 11 and 13). Furthermore, a locking projection 26 is formed on the substantial center part on the back side of the lower part of the upper inner box 5a and on the back side of the cold air return ducts 23, 24 on the upper part of both sides (see FIG. 8).

  The cooling chamber case 14 is applied to the bottom surface of the upper inner box 5a so as to cover the cooling chamber 9 from the bottom of the upper inner box 5a, and the locking hole 20 of the locking piece 21 at the center of the rear side is formed on the upper inner box 5a. It is attached to the upper inner box 5a in a state of being fitted and engaged with the locking protrusion 26 at the center on the back side. In this state, the connecting tube portions 19 of the duct members 15, 16, and 17 formed in the cooling chamber case 14 are fitted into the cold air duct 22 of the lower inner box 5 b and the connection ports 25 of the cold air return ducts 23 and 24. Match. The locking holes 20 of the locking pieces 21 provided in the duct members 15 and 16 on both sides are fitted and engaged with the locking protrusions 26 on the back surface of the lower inner box 5b. Thereby, the cooling chamber case 14 and each duct member 15, 16, and 17 can be attached to the upper inner box 5a and the lower inner box 5b, and both can be integrally connected. At this time, the flange portions 18 of the duct members 15, 16, and 17 are configured to press-contact and surround the peripheral portions of the connection ports 25 of the lower inner box 5b.

  Further, the duct member 17 in the central part is connected to the central part of the cooling chamber 9, that is, the central part of the cooler 10, and serves as a cool air going-out duct from the cooler 10. The cold air in the central part will be supplied. Further, the duct members 15 and 16 on both sides are connected to the left and right side portions of the cooling chamber 9, that is, the both side portions of the cooler 10, and serve as cool air reflux ducts to the cooler 10. The cool air from the cool air return ducts 23 and 24 returns to both sides of the cooler 10.

  As shown in FIG. 5, the cold air duct 22 is provided with cold air outlets 27 on both sides thereof, and the cold air blows out toward the front sides of the refrigerator compartment 3 in the lower inner box 5b. It is configured as follows. Further, as shown in FIG. 3, the refrigerator compartment 3 is partitioned into a plurality of spaces in the vertical direction by a storage shelf 28. As shown in FIG. 2, a chilled chamber 29 is provided in the upper right portion of the space in the refrigerator compartment 3 when viewed from the front of the uppermost portion, and an accessory storage chamber 30 is provided on the left side. As shown in FIG. 3, a vegetable storage box 31 and a fruit storage box 32 are incorporated in the lowermost space in the refrigerator compartment 3 so as to be freely drawn out.

  About the refrigerator 50 comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The refrigerator 50 is an integrated component in which the upper inner box 5a and the lower inner box 5b are integrally connected by the front plate portion 5c. Therefore, a process of incorporating a partition plate into one inner box to form a refrigerator compartment, a freezer compartment, or the like is not necessary, and productivity can be improved.

  In addition, the inner box 5 is provided with the cooling chamber case 14 and the back surfaces of the upper inner box 5a and the lower inner box 5b opposite to the side on which the front plate part 5c is provided. It is the structure connected by the cylindrical duct members 15,16,17. Therefore, even if the upper inner box 5a and the lower inner box 5b are simply connected together by the front plate portion 5c, the rigidity can be increased. Accordingly, when the inner box 5 is moved to be incorporated into the outer box 4 during the production process, the movement of the upper inner box 5a and the lower inner box 5b is changed to the front plate connecting the upper inner box 5a and the lower inner box 5b. This can be performed smoothly without causing torsional damage or the like of the portion 5c. Therefore, productivity can be further improved, and quality deterioration and yield reduction due to breakage of the front plate portion 5c can be prevented.

  The duct members 15, 16, and 17 connect the upper inner box 5 a and the lower inner box 5 b at both sides of the cooling chamber case 14 and at the three positions in the front center. As a result, the back portion of the upper inner box 5a can be supported and connected in a well-balanced manner, and the effect of preventing torsional breakage and the like can be enhanced, and quality deterioration and yield reduction can be more reliably prevented.

  Further, the front plate portion 5c is configured to increase the strength by making the plate thickness thicker than the plate peripheral wall of the inner box 5, and to prevent the occurrence of deformation and the like more reliably. Has been. Thereby, the deformation | transformation, distortion, etc. of the front plate part 5c visible from the outside when the door is opened can be reliably prevented, and the quality of the refrigerator 50 can be maintained high.

  Moreover, in the refrigerator 50 of this Embodiment, what connects the back surface part of the upper inner box 5a and the back surface part of the lower inner box 5b is the cylindrical duct member 15 integrally formed in the cooling chamber case 14, 16,17. And the foaming heat insulating material 6 is filled in the clearance gap whole area between the upper inner box 5a and the lower inner box 5b other than that. Therefore, the inner box 5 on the higher set temperature side, in this embodiment, the lower inner box 5b in which the refrigerator compartment 3 is formed, the inner box 5 on the lower set temperature side, specifically the freezer compartment 2 The heat insulating property between the upper inner box 5a and the upper inner box 5a is better than that when a conventional polystyrene foam dew tray is interposed. As a result, it is possible to strongly suppress heat transfer from the lower inner box 5b to the upper inner box 5a, and accordingly, the frequency of cooling the inside of the upper inner box 5a is reduced, thereby reducing power consumption. can do.

  Further, the duct members 15, 16, and 17 that connect the upper inner box 5 a and the lower inner box 5 b are used to return the cool air to the cooler 10 by using the duct members 15 and 16 provided on both sides of the back wall of the cooling chamber case 14. A duct member 17 provided in front of the duct is configured as a cold air duct from the cooler 10. Thereby, efficient cooling becomes possible and power consumption can be further reduced. In other words, the cold air having a slightly higher temperature that circulates from the refrigerator compartment 3 of the lower inner box 5b returns to the outer peripheral portion of the cooler 10 from the duct members 15 and 16 on both sides serving as the cold air reflux duct. The cool air having a slightly higher temperature that has returned to the outer peripheral portion of the cooler 10 is cooled while flowing from the outer peripheral portion of the cooler 10 to the central portion, and has the lowest temperature. The cool air having the lowest temperature is supplied from the duct member 17 serving as the cool air forward duct to the cool air duct 22 of the refrigerating chamber 3 so that the recirculating air from the refrigerating chamber 3 or the like has a slightly higher temperature. Is not supplied to the duct member 17 in the central portion as it is. The synergistic action of these two enables efficient cooling, and power consumption can be further reduced accordingly.

  Further, in the present embodiment, the connection cylinder portions 19 of the duct members 15, 16, and 17 formed in the cooling chamber case 14 are connected to the cold air duct 22 of the lower inner box 5b and the cold air return ducts 23 and 24, respectively. It is fitted to the mouth 25. When the engaging holes 20 of the engaging pieces 21 provided in the duct members 15 and 16 on both sides are fitted and engaged with the engaging protrusions 26 on the back surface of the lower inner box 5b, the duct members 15, 16, The 17 flange portions 18 are configured to press-contact and cover the peripheral portions of the connection ports 25 of the lower inner box 5b.

  With such a configuration, when the foam heat insulating material 6 is filled between the outer box 4 and the inner box 5, the foam heat insulating material 6 can be prevented from entering the inside through the connection port 25. Further, since the foamed heat insulating material 6 can be prevented from inhibiting the flow of cool air passing through the duct members 15, 16, and 17, good cooling performance can be exhibited, and cool air circulation accompanying an increase in passage resistance can be achieved. An increase in the rotational speed of the blower fan 11 can be suppressed. Therefore, power consumption can be suppressed and it can contribute to maintenance of energy saving property.

  Since the connection port 25 above the cold air duct 22 of the lower inner box 5b with which the duct member 17 in the central portion is fitted is present on the ceiling surface of the lower inner box 5b, that is, a plane portion weak in strength. 6, the outer peripheral portion of the connection port 25 is easily deformed inward of the lower inner box 5b. However, in the present embodiment, since the flange portion 18 of the duct member 17 covers and reinforces the peripheral portion of the connection port 25, such deformation can be reliably prevented.

  When filling the foam heat insulating material 6, as shown in FIG. 12, a jig A for preventing deformation of the inner box 5 due to foaming pressure is set inside the lower inner box 5b. At this time, in the periphery of the connection port 25 of the duct member 17, the connection cylinder portion 19 of the duct member 17 protrudes inward of the lower inner box 5 b, so the jig A and the periphery of the connection port 25 of the lower inner box 5 b It is considered that a gap t is formed between the portion and the outer peripheral portion of the connection port 25 of the lower inner box 5b is easily deformed by the gap t. However, in the present embodiment, since the peripheral portion of the connection port 25 is covered and reinforced by the flange portion 18, such deformation can be prevented.

  With such a configuration, the connecting cylinder portion 19 of the duct member 17 is plunged into the lower inner box 5b to secure the fitting connection, and the peripheral portion of the connection port 25 is inward of the lower inner box 5b. It is possible to prevent the cold air from leaking due to deformation into the gap and forming a gap between the connecting cylinder portion 19 of the duct member 17. Therefore, quality improvement and further power consumption reduction can be achieved.

  Moreover, the cooling chamber case 14 and the duct members 15, 16, and 17 are engaged with the upper inner box 5a and the lower inner box 5b. At this time, the locking hole 20 of the locking piece 21 at the center of the back side of the cooling chamber case 14 is fitted into the locking protrusion 26 at the center of the back side of the upper inner box 5a, and the duct members 15 and 16 on both sides of the back side are also fitted. The locking hole 20 of the locking piece 21 is in a state of being fitted into the locking projection 26 on the back surface of the lower inner box 5b. As a result, the upper inner box 5a and the lower inner box 5b can be reliably connected and fixed, and even if the foaming pressure of the foam heat insulating material 6 is applied between the upper inner box 5a and the lower inner box 5b, It is possible to prevent the upper inner box 5a and the lower inner box 5b from being spread. Therefore, it is possible to maintain the positions of the upper inner box 5a and the lower inner box 5b with high accuracy and prevent the occurrence of defective products.

  As mentioned above, although the refrigerator 50 of this Embodiment was demonstrated, the refrigerator of this invention is not limited to the structure shown in this Embodiment, In the range which achieves the objective of this invention, it can change suitably. is there.

  For example, the engagement between the cooling chamber case 14 and the duct members 15, 16, 17 and the upper inner box 5a and the lower inner box 5b is a combination of holes and protrusions, but a combination of recesses and protrusions. May be used. Further, in the present embodiment, the upper inner box 5a is described as the freezer compartment 2 and the lower inner box 5b is the refrigerator compartment 3, but the reverse may be possible.

  As described above, the refrigerator 50 according to the present embodiment is disposed inside the outer box 4 that forms the outside of the refrigerator body 1 and the outer box 4, and includes an upper inner box 5 a, a lower inner box 5 b, and an upper box. An inner box 5 having a front plate portion 5c for connecting the inner box 5a and the lower inner box 5b, and a foam heat insulating material 6 filled between the outer box 4 and the inner box 5 are provided. The refrigerator 50 is attached to the rear surface of the upper inner box 5a so as to be positioned below the cooler 10 disposed on the rear surface of the upper inner box 5a, and the upper inner box 5a and the lower inner box 5a. A cooling chamber case 14 having a plurality of duct members 15, 16, and 17 that connect the box 5 b is provided. The cooling chamber case 14 has a plurality of duct members 15, 16, and 17 at least on both sides on the rear side of the cooling chamber case 14 and on the front between the both sides, and the plurality of duct members 15, 16, and 17 include The rear part of the upper inner box 5a and the rear part of the lower inner box 5b are connected and fixed.

  With such a configuration, it is not necessary to separately incorporate a partition plate for partitioning the refrigerator compartment 3 and the freezer compartment 2 in the inner box 5, and productivity is improved. Moreover, since the upper inner box 5a and the lower inner box 5b are connected not only by the front plate 5c but also by the duct members 15, 16, and 17 at three places, the rigidity can be improved in a balanced manner. Therefore, the upper inner box 5a and the lower inner box 5b can be smoothly moved in the production process without causing torsional damage or the like of the front plate portion 5c. Therefore, further improvement in productivity can be achieved, and quality deterioration and yield reduction due to breakage of the front plate portion 5c can be prevented. Furthermore, since only the cylindrical duct members 15, 16, and 17 are located between the upper inner box 5a and the lower inner box 5b, other parts, that is, the upper inner box 5a, and The entire area between the lower inner boxes 5b is filled with the foam heat insulating material 6 having high heat insulating properties. Thereby, the heat insulation between the upper inner box 5a and the lower inner box 5b can be made good, suppressing the heat transfer from one of the upper inner box 5a and the lower inner box 5b to the other, Power consumption for cooling can be reduced.

  In the present embodiment, among the plurality of duct members 15, 16, 17, the pair of duct members 15, 16 provided on both sides on the rear side of the cooling chamber case 14 are used to return the cool air to the cooler 10. Functions as a duct. Further, the duct member 17 provided in front of the pair of duct members 15 and 16 is configured to function as a cool air going-out duct from the cooler 10.

  With such a configuration, the slightly higher temperature cold air that circulates from the refrigerator compartment 3 or the like returns to the outer peripheral portion of the cooler 10 from the duct members 15 and 16, and the outer periphery of the cooler 10 from the duct member 17 in the central portion. Cold air having a low temperature cooled while flowing from the portion to the central portion is supplied from the duct member 17 at the central portion to the refrigerator compartment 3 or the like. In addition, since a slightly higher temperature of the cold air that circulates from the refrigerator compartment 3 or the like is not supplied as it is from the duct member 17 in the central portion, efficient cooling is possible, and power consumption is further reduced accordingly. Can be reduced.

  In the refrigerator 50, the cooling chamber case 14 is provided with a locking hole 20 in the center of the back surface and each of the pair of duct members 15 and 16, and the lower portion of the back surface of the upper inner box 5a and the lower inner box 5b. Locking protrusions 26 are provided on the upper portions on both sides of the rear surface of the head. In addition, a locking hole 20 provided in the center of the back surface of the cooling chamber case 14 and each of the pair of duct members 15 and 16 is fitted into the locking protrusions 26 of the upper inner box 5a and the lower inner box 5b. And the rear part of the upper inner box 5a and the lower inner box 5b is connected.

  With such a configuration, the upper inner box 5a and the lower inner box 5b can be reliably connected and fixed, and the space between the upper inner box 5a and the lower inner box 5b is expanded by the foaming pressure of the foam heat insulating material 6. Can be prevented. Therefore, it is possible to maintain the positions of the upper inner box 5a and the lower inner box 5b with high accuracy and prevent the occurrence of defective products.

  In addition, a connecting cylinder portion 19 is provided at the ends of the plurality of duct members 15, 16, and 17 of the refrigerator 50, and a flange portion 18 is provided in the vicinity of the connecting cylinder portion 19. And the surrounding part of the connection port of the lower inner box 5b is covered with the flange part 18.

  As described above, since the flange portion 18 covers the peripheral portion of the lower inner box 5b to which the duct members 15, 16, and 17 are fitted and connected, the foam insulation that is filled between the inner box 5 and the outer box 4 is provided. It is possible to prevent the peripheral portion of the connection port from being deformed by the foaming pressure of the material 6. As a result, the connecting cylinder portion 19 of the duct members 15, 16, and 17 is plunged into the lower inner box 5b to secure the fitting connection, and at the same time, the cold air leak due to the deformation of the peripheral portion of the connection port is prevented. can do. Thereby, quality improvement and further power consumption reduction can be aimed at.

  Moreover, the flange part 18 is comprised in the shape along the connection port surrounding part of the lower inner box 5b.

  Thereby, the surrounding part of the connection port of the lower inner box 5b can be covered and reinforced without a gap. Therefore, it is possible to more reliably prevent deformation of the peripheral portion of the connection port, and to further improve quality and reduce power consumption.

  As described above, according to the present invention, it is possible to provide a refrigerator with high energy savings by reducing power consumption while maintaining and improving productivity and preventing damage to the inner box. It is possible to achieve a special effect. Therefore, the present invention is useful because it can be widely applied to refrigerators for business use as well as home use.

DESCRIPTION OF SYMBOLS 1 Refrigerator main body 2 Freezing room 3 Refrigeration room 4 Outer box 5 Inner box 5a Upper inner box 5b Lower inner box 5c Front plate part 6 Foam heat insulating material 7,8 Door 9 Cooling chamber 10 Cooler 11 Blower fan 12 Compressor 14 Cooling chamber Case 15, 16, 17 Duct member 18 Flange portion 19 Connection cylinder portion 20 Locking hole 21 Locking piece 22 Cold air duct 23, 24 Cold air return duct 25 Connection port 26 Locking protrusion 27 Cold air outlet 28 Storage shelf 29 Chilled chamber 30 Accessories storage room 31 Vegetable storage box 32 Fruit storage box 50 Refrigerator

Claims (5)

An outer box constituting the outside of the refrigerator body,
An inner box disposed inside the outer box, having an upper inner box, a lower inner box, and a front plate portion connecting the upper inner box and the lower inner box;
Foam heat insulating material filled between the outer box and the inner box,
A cooler disposed on the back surface of the upper inner box;
It is attached to the back surface of the upper inner box so as to be positioned below the cooler, and includes a cooling chamber case having a plurality of duct members connecting the upper inner box and the lower inner box,
The cooling chamber case has the plurality of duct members at least on both sides on the rear side of the cooling chamber case and on the front between the both sides, and the plurality of duct members are rear portions of the upper inner box. And a rear part of the lower inner box. Among the plurality of duct members, a pair of duct members provided on both sides on the rear side of the cooling chamber case functions as a cold air reflux duct to the cooler and is provided in front of the pair of duct members. The refrigerator according to claim 1, wherein the formed duct member is configured to function as a cool air duct from the cooler. The cooling chamber case is provided with a locking hole in the center part on the back and each of the pair of duct members,
Locking protrusions are provided on the lower part of the back surface of the upper inner box, and on both sides of the back surface of the lower inner box,
The locking hole provided in each of the center portion of the back surface and the pair of duct members of the cooling chamber case is fitted into the locking protrusions of the upper inner box and the lower inner box, The refrigerator according to claim 1 or 2, wherein a rear part of the upper inner box and the lower inner box are connected. A connecting tube portion is provided at an end portion of the plurality of duct members,
A flange portion is provided in the vicinity of the connecting tube portion,
The refrigerator according to any one of claims 1 to 3, wherein a peripheral portion of the lower inner box is covered with the flange portion. The refrigerator according to claim 4, wherein the flange portion is configured in a shape along the periphery of the connection port of the lower inner box.

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