JP2005345063A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of being efficiently cooled by an inexpensive cooling unit and free from dew condensation on a wall face of a cold air duct. <P>SOLUTION: A refrigeration chamber 6 is provided with the flat cooling unit 25, a cooling fan 26, and a cold air duct 22 partitioned from an inner box 2 of a heat insulating casing constituting the refrigeration chamber by a decorative sheet 21, the cooling unit 25 is mounted in the cold air duct 22, the decorative sheet 21 has a communication opening 27 communicated with the refrigeration chamber, and a cold air discharge duct 22A and a cold air suction duct 22B are formed in the cold air duct 22. As the refrigerator can be efficiently cooled by the cooling unit 25, the cooling unit 25 can be inexpensively constituted. Further as the suction duct is formed at a storage side of the cold air duct 22, the dew condensation on the wall face of the decorative sheet 21 can be prevented. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a refrigerator capable of optimally cooling a refrigerator compartment.

  In general, refrigerators refrigerate the cold room cooled by a cooler in the refrigerator to cool the inside of the refrigerator and cool directly in the refrigerator with a cooling wall cooled by the cooler. In the case of the intercooling type, a suction duct and a discharge duct that circulate the air in the warehouse are required separately from the place where the cooler is installed, so the effective internal volume in the refrigerator compartment decreases, while direct cooling In the formula, it was not possible to cope with the rapid rise in the internal temperature when food was added.

  The conventional direct cooling refrigerator has arranged a cooling fan, and compensated for the direct cooling type defect by operating the cooling fan in a timely manner (see, for example, Patent Document 1).

  FIG. 5 shows a conventional refrigerator described in Patent Document 1. As shown in FIG. As shown in FIG. 5, in the refrigerator 1 comprised by the heat insulation box 5 with which the heat insulating material 4 was filled between the inner box 2 and the outer box 3, a refrigerator is the refrigerator compartment 6, the vegetable compartment 7, and the 1st from the top. One freezer compartment 8 and a second freezer compartment 9.

  The refrigerator compartment 6 and the vegetable compartment 7 are arranged with cooling pipes 10 (evaporators) in contact with the upper, lower, left and right wall surfaces constituting the inner box, and the inside is provided with a plurality of cooling wall surfaces cooled by the cooling pipes 10. It is the composition which has.

  A cold air duct 11 is arranged on the inner box wall of the rear wall that is the inside of the refrigerator compartment, and a cooling fan 12 for the refrigerator compartment is arranged above the cold air duct 11. The cold air duct 11 has an air outlet 13 on the upper side and an outlet 14 on the lower side, and can be taken into the cold air duct 11 through a plurality of slit-shaped openings 15 from the front surface.

  According to the refrigerator configured as described above, when the temperature in the refrigerator compartment is stable within the set range, the cooling fan 12 for refrigeration is stopped and the cooling pipe is operated by operating the compressor 16. When the refrigerant flows through the inner wall 10, the wall surface of the inner box is directly cooled, and the upper, lower, left and right, and rear walls become cooling wall surfaces for cooling.

Next, when food is added and the internal temperature rises, the cooling fan 12 for refrigeration is operated, the cold air is circulated through the cold air duct 11 to cool the internal space, and the internal temperature is lowered. After the operation of the cooling fan 12, when the inside of the refrigerator reaches the set temperature, the cooling fan 12 for refrigeration is stopped and the cooling is returned to the cooling wall only.
JP 2000-28257 A

  However, in the configuration as described above, it is necessary to dispose a large number of cooling pipes in the inner box, resulting in a great cost. In addition, the inner wall surface temperature of the cold air duct is low, and there is a problem that condensation occurs.

  The present invention solves the above-described problems, and a cooler can be configured with a small number of cooling pipes to be inexpensive. Another object of the present invention is to provide a refrigerator in which the cold air duct wall surface does not condense.

  In order to solve the above-described conventional problems, the refrigerator of the present invention includes a flat plate cooler in a refrigerator compartment, a cooling fan, an inner box of a heat insulating box constituting the refrigerator compartment, and a cold air duct partitioned by a decorative plate. The cooler is installed in the cool air duct, the decorative plate is provided with a communication port communicating with the refrigerator compartment, the cool air duct forms a cool air discharge duct between the cooler and the inner box, A cold air suction duct is formed between the cooler and the decorative plate.

  As a result, the cool air that cools the inside of the refrigerator is efficiently cooled by the cooler installed in the cooling duct, so that the cooler can be configured with a small number of cooling pipes and can be made inexpensive. Further, the cold air duct can be minimized and the effective internal volume can be increased. Further, the inside of the cold air duct forms a suction duct, and the decorative board wall surface does not condense.

  Further, the refrigerator of the present invention comprises a flat cooler in the refrigerating room, a cooling fan, an inner box of a heat insulating box constituting the refrigerating room, and a cold air duct partitioned by a decorative plate, The cool air duct is installed in the cool air duct, the cool air duct forms a cool air discharge duct between the cooler and the inner box, and the decorative plate is provided with a cool air discharge port and a cold air suction port communicating with the refrigerator compartment, A cool air discharge duct and a cool air suction duct are formed by a dividing wall between the container and the decorative plate.

  As a result, there is no condensation on the surface of the decorative board, and a discharge port and a suction port can be formed in each shelf, so that temperature unevenness in the refrigerator compartment can be suppressed regardless of how food is placed.

  The refrigerator of this invention can make the cooler of a refrigerator compartment cheap. Furthermore, the effective internal volume can be increased. Furthermore, the decorative wall surface does not condense. Moreover, the temperature nonuniformity of a refrigerator compartment can be suppressed. In addition, the cooling amount of the refrigerator compartment can be ensured when the amount of cooling load increases, such as when food is introduced without problems such as freezing of food.

  The invention according to claim 1 comprises a refrigerator having a flat plate shape, a cooling fan, an inner box of a heat insulating box constituting the refrigerator compartment, and a cold air duct partitioned by a decorative plate. Is installed in the cold air duct, and the decorative plate is provided with a communication port communicating with the refrigeration chamber. The cold air duct forms a cold air discharge duct between the cooler and the inner box, and By forming the cold air suction duct between the plates, the cool air that cools the inside of the refrigerator is efficiently cooled by the cooler installed in the cooling duct, so that the cooler can be configured with a small number of cooling pipes and can be made inexpensive. Further, the cold air duct can be minimized and the effective internal volume can be increased. Moreover, the inside of the cold air duct forms a suction duct, and the decorative board surface does not condense.

  The invention according to claim 2 is the invention according to claim 1, wherein the area of the communication port provided in the decorative plate is larger as the distance from the cooling fan is closer, so that the communication port provided in the decorative plate has a larger area. The amount of cold air sucked in can be made uniform, and temperature unevenness in the refrigerator compartment can be suppressed.

  According to a third aspect of the present invention, the refrigerator includes a flat plate-like cooler, a cooling fan, an inner box of a heat insulating box constituting the refrigerator compartment, and a cold air duct partitioned by a decorative plate. Is installed in the cold air duct, the cold air duct forms a cold air discharge duct between the cooler and the inner box, the decorative plate is provided with a cold air discharge port and a cold air suction port communicating with the refrigerator compartment, By forming a cool air discharge duct and a cool air suction duct between the cooler and the decorative plate by a dividing wall, there is no condensation on the decorative plate surface, and a discharge port and a suction port can be formed on each shelf, which is related to how food is placed. In addition, uneven temperature in the refrigerator can be suppressed.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the cool air inlet area provided on the decorative plate is larger as the distance from the cooling fan is closer, and the cool air outlet area is the distance from the cooling fan. By making it closer, the amount of cold air discharged from the air outlet provided on the decorative board and the amount of cold air drawn from the cold air inlet can be made uniform, and temperature unevenness in the refrigerator compartment can be further suppressed.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the cold air cross-sectional area of the air duct is larger between the cooler and the inner box than between the cooler and the decorative plate. By doing so, it is possible to increase the total circulating cold air amount without flowing the amount of cold air sucked or discharged from the communication port provided on the decorative plate more than necessary, such as freezing of food and condensation on the decorative plate surface. The amount of cooling in the refrigerator compartment can be secured even when the amount of cooling load increases, such as when food is introduced without any problem.

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

(Embodiment 1)
FIG. 1 shows a longitudinal sectional view of a refrigerator in Embodiment 1 of the present invention. FIG. 2 shows a refrigeration cycle diagram of the refrigerator in the first embodiment of the present invention.

  In FIG. 1, the refrigerator 17 is constituted by a heat insulating box 5 in which a heat insulating material 4 is filled between an inner box 2 and an outer box 3. The refrigerator 17 has a cold room 6 from the top, a low temperature room 18 having a set temperature lower than that of the cold room, a first freezer room 8 and a second freezer room 9 at the lower part of the cold room 6. The second freezer compartment 9 is partitioned by a freezer partition plate 19, and the refrigerator compartment 6 and the first freezer compartment 8 are partitioned by a heat insulating partition wall 20 having the same configuration as the heat insulating box 9.

  The cold room 6 is provided with a cold air duct 22 partitioned by a rear wall surface of the inner box 2 and a decorative plate 21, and a cooling plate 25 including a cooling pipe 23 and a flat plate 24 is provided in the cold air duct 22. The cool air discharge duct 22 a is arranged between the cooling plate 25 and the decorative plate 21 so that the cool air suction duct 22 b is formed between the inner box 2 and the inner box 2. The distance A between the cooling plate 25 and the inner box 2 is also arranged at a position where it is larger than the distance B between the cooling plate 25 and the decorative plate 21.

  In addition, a cooling fan 26 and a suction port 28 are arranged in the upper part, and a discharge port 29 is opened in the low temperature chamber 18 whose set temperature is lower than that in the refrigeration room below the refrigeration room 6. The decorative plate 21 also has a communication port 27 that has a plurality of opening areas communicating with the cold air suction duct 22b and the inside of the refrigerator compartment 6 that are larger as the distance from the cooling fan 26 is closer (upward of the decorative plate). . A cooling fan 30 and an evaporator 31 are arranged in the second freezer compartment 9.

  FIG. 2 shows a refrigeration cycle. The refrigerant discharged from the compressor 16 passes through the condenser 32 and the three-way valve 33 as shown by the solid line, and then is decompressed by the capillary tube 34 and enters the evaporator 31. A first refrigeration cycle returning to the compressor 16 is configured again via the refrigerant tank 35. Further, the refrigerant discharged from the compressor 16 passes through the condenser 32 as indicated by the dotted line, the refrigerant flow path is switched by the three-way valve 33, the pressure is reduced by the capillary tube 36 as indicated by the dotted line, and the refrigerant is supplied to the cooling plate 25. A second refrigeration cycle that enters and returns to the compressor 16 via the refrigerant tank 37 is configured.

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

  Due to the operation of the compressor 16, the refrigerant flows through the cooling plate 25 or the evaporator 31, thereby cooling the inside of the warehouse. That is, on the freezer compartment 8 and 9 side, the cold air cooled by the evaporator 31 is circulated in the warehouse by the freezing cooling fan 30 and the freezer compartments 8 and 9 are cooled.

  On the other hand, on the refrigerator compartment 6 side, the cold air cooled by the cooling plate 25 in the cold air discharge duct 22a is discharged from the discharge port 29 in the back surface portion of the low temperature chamber 18, first cooling the low temperature chamber 18, and then The entire refrigerator compartment 6 is cooled and sucked from the communication port 27 and the suction port 28 of the decorative plate 21. At that time, the cold air sucked from the suction port 28 is cooled by the cooling plate 25 in the cold air suction duct 22b, and the cold air is efficiently cooled on both surfaces of the cooling plate 25.

  As described above, in the present embodiment, since the cold air can be efficiently cooled on both surfaces of the cooling plate 25, the cooling plate 25 can be configured with a small number of cooling pipes at low cost. Further, the cold air duct 22 can be minimized, and the effective internal volume of the refrigerator compartment can be increased. Furthermore, there is a cold air suction duct 22b between the decorative plate 21 and the cooling plate 25, and the decorative plate 21 is prevented from being extremely cooled by the cooling plate 25, so that condensation of the decorative plate 21 can be prevented.

  Further, in the present embodiment, the opening area of the communication port 27 is increased as the distance from the cooling fan 26 is closer (as the upper part of the decorative plate), so that the suction cold air from the communication port 27 provided in the decorative plate 21 is particularly large. The amount can be made uniform, and temperature unevenness in the refrigerator can be further suppressed.

(Embodiment 2)
Embodiment 2 according to the present invention will be described with reference to the drawings. In addition, about the same structure as Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  FIG. 3 shows a longitudinal sectional view of the cold air discharge duct portion of the refrigerator in the second embodiment of the present invention. FIG. 4 shows a front view of the decorative plate of the refrigerator in Embodiment 2 of the present invention.

  A cool air discharge port 39 and a cold air suction port 41 are opened in the decorative plate 37, and a cool air discharge duct 40 and a cold air suction duct 42 are formed by a dividing wall 38 between the cooling plates 25. The opening area of the cold air discharge port 39 is made smaller as the distance from the cooling fan 26 is shorter (upward of the decorative plate). Further, the opening area of the cold air inlet 41 is made larger as the distance from the cooling fan 26 is shorter (as the upper part of the decorative plate).

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

  Cooling of the refrigerator compartment 6 is performed by discharging the cool air cooled by the cooling plate 25 in the cool air discharge duct 22 a from the discharge port 29 in the back surface portion of the low temperature chamber 18 in the low temperature chamber 18. In the refrigerator compartment 6, the air discharged from the discharge port 29 and the cold air cooled by the cooling plate 25 in the cold air discharge duct 40 are discharged from the cold air discharge port 39 of the decorative plate 37 and cooled. And the cold air which cooled the refrigerator compartment 6 is sucked in from the suction inlet 28 and the cold air suction inlet 41, and the cold air sucked in from the cold air suction inlet 41 is cooled by the cooling plate 25 in the cold air suction duct 42 to the cooling fan 26. Return.

  As described above, in the present embodiment, there is no condensation on the surface of the decorative board, and a discharge port and a suction port can be formed on each shelf, so that temperature unevenness in the refrigerator compartment can be suppressed regardless of how food is placed.

  In the present embodiment, the cool air inlet area provided on the decorative board is larger as the distance from the cooling fan is closer, and the cool air outlet area is smaller as the distance from the cooling fan is closer. It is possible to make uniform the amount of cold discharged air and sucked cold air from the provided communication port, and further suppress temperature unevenness in the refrigerator compartment.

  In the present embodiment, the cold air ventilation cross-sectional area of the cold air discharge duct 22a is larger than the cold air ventilation cross-sectional area of the cold air discharge duct 40, so that the discharge cold air from the cold air discharge port 39 provided in the decorative board 21 is reduced. The amount of circulating chilled air can be increased without flowing more than necessary, and the amount of cooling in the refrigerator compartment 6 can be secured even when the amount of cooling load increases, such as when food is introduced without problems such as food freezing. .

  As described above, the refrigerator according to the present invention can cool a low temperature room having a lower set temperature than the refrigerating room and the refrigerating room installed at the lower part of the refrigerating room with an inexpensive cooler sufficiently to the set temperature without temperature unevenness. It can also be applied as a cooling method for refrigeration equipment in general.

The longitudinal cross-sectional view of the refrigerator in Embodiment 1 of the refrigerator by this invention Refrigeration cycle diagram of refrigerator in Embodiment 1 of the refrigerator according to the present invention The longitudinal cross-sectional view in the cold air discharge duct part of the refrigerator in Embodiment 2 of the refrigerator by this invention The front view of the decorative panel of the refrigerator in Embodiment 2 of the refrigerator by this invention Vertical section of a conventional refrigerator

Explanation of symbols

2 Inner box 21, 37 Decorative plate 22 Cooling duct 22 a, 40 Cold air discharge duct 22 b, 42 Cold air suction duct 25 Cooling plate 26 Cooling fan 27 Communication port 38 Partition wall 39 Cold air discharge port 41 Cold air suction port

Claims (5)

  The refrigerator compartment is provided with a flat plate cooler, a cooling fan, an inner box of a heat insulating box constituting the refrigerator compartment, and a cold air duct partitioned by a decorative plate, the cooler is installed in the cold air duct, The decorative plate is provided with a communication port that communicates with a refrigerator compartment, the cold air duct forms a cool air discharge duct between the cooler and the inner box, and a cool air suction duct forms between the cooler and the decorative plate. A refrigerator characterized by that.   The refrigerator according to claim 1, wherein the area of the communication opening provided in the decorative plate is increased as the distance from the cooling fan is shorter.   The refrigerator compartment includes a flat plate cooler, a cooling fan, an inner box of a heat insulating box constituting the refrigerator compartment, and a cold air duct partitioned by a decorative plate, and the cooler is installed in the cold air duct, The cold air duct forms a cold air discharge duct between the cooler and the inner box, the decorative plate is provided with a cold air discharge port and a cold air suction port that communicate with the refrigerator compartment, and the cooler and the decorative plate are divided. A refrigerator characterized in that a cold air discharge duct and a cold air suction duct are formed by walls.   4. The refrigerator according to claim 3, wherein the cool air inlet area provided on the decorative plate is larger as the distance from the cooling fan is closer, and the cold air outlet area is smaller as the distance from the cooling fan is closer.   The refrigerator according to any one of claims 1 to 4, wherein the cold air ventilation cross-sectional area of the cold air duct is larger between the cooler and the inner box than between the cooler and the decorative plate.

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