JP2006078050A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of ensuring the cooling quantity of a cooling chamber even in a case that a cooling load quantity is increased, and suppressing an uneven temperature within the cooling chamber. <P>SOLUTION: The cooling chamber 6 includes a cooling plate 25 arranged along the rear wall of an inner box 2, a decorative plate 21 covering the cooling plate 25, and a cooling fan 26. The cooling plate 25 is set between the inner box 2 and the decorative plate 21 to form cold air circulating passages between the cooling plate 25 and the inner box 2 and between the cooling plate 25 and the decorative plate 21. The clearance between the cooling plate 25 and the decorative plate 21 is set larger than the clearance between the cooling plate 25 and the inner box 2. According to this, the air quantity guided into the cooling chamber 6 is increased, and even if the cooling load quantity is increased, the cooling quantity of the cooling chamber can be ensured. <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. 8 is a longitudinal sectional view of a conventional refrigerator described in Patent Document 1. As shown in FIG. As shown in FIG. 8, 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, the refrigerator 1 is the refrigerator compartment 6, vegetable room 7, A first freezer compartment 8 and a second freezer compartment 9.

  In the refrigerator compartment 6 and the vegetable compartment 7, cooling pipes 10 (evaporators) are arranged in contact with the upper, lower, left, and right wall surfaces constituting the inner box, and the inside of the refrigerator includes 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 6, 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, the cooling of the refrigerator compartment 6 is stopped by cooling the cooling fan 12 and operating the compressor 16 when the internal temperature is stable within the set range. By flowing a coolant through the pipe 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, the cooled cooling pipe exchanges heat with the inner box having low thermal conductivity, and cools the air in the cabinet, so the heat exchange efficiency is poor, and a very large load such as warm food in the cabinet There was a problem that the cooling capacity was insufficient when.

  An object of the present invention is to solve the above-described problem, and to provide a refrigerator that has high heat exchange efficiency between a cooling pipe and air in a warehouse even when a large load is applied, and that does not have a necessary cooling capacity. And

  In order to solve the above-described conventional problems, the refrigerator of the present invention includes an inner box constituting the inside of the refrigerator compartment, a flat cooling plate disposed along the rear wall of the inner box, and a decorative plate covering the cooling plate, A cooling fan, a cooling plate is installed between the inner box and the decorative plate, a cooling air circulation air passage is formed between the cooling plate and the inner box and between the cooling plate and the decorative plate, and a gap between the cooling plate and the decorative plate is connected to the cooling plate. It is larger than the gap between the inner boxes.

  As a result, the amount of air flowing between the decorative plate and the cooling plate can be made larger than the amount of air flowing between the inner box and the cooling plate, and a large amount of cold air can be guided to the center of the refrigerator compartment.

  The refrigerator of the present invention can secure the cooling amount of the refrigerator compartment even when the amount of cooling load such as charging food is increased. In addition, temperature unevenness in the refrigerator compartment can be suppressed.

  The invention according to claim 1 includes an inner box constituting the inside of the refrigerator compartment, a flat cooling plate disposed along the rear wall of the inner box, a decorative plate covering the cooling plate, and a cooling fan, The cooling plate is installed between the inner box and the decorative plate, a cooling air circulation air passage is formed between the cooling plate, the inner box, and the cooling plate and the decorative plate, and a gap between the cooling plate and the decorative plate is provided. By making it larger than the gap between the cooling plate and the inner box, the amount of air flowing between the decorative plate and the cooling plate can be made larger than the amount of air flowing between the inner box and the cooling plate. The amount of air guided to the center of the room increases, and the amount of cooling in the refrigerating room can be secured even when the amount of cooling load such as food is increased.

  According to a second aspect of the present invention, in the first aspect of the invention, the cooling plate is configured by a tube-on-sheet in which a cooling pipe is pressure-bonded to a flat plate, and the cooling pipe is disposed on the decorative plate side. In addition, a low-temperature surface can be disposed on the side of the decorative plate with a large air volume, and the temperature of the air guided to the center of the refrigerator compartment is lowered, so that the cooling speed can be improved.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the air flowing in the inner box side is also guided to the central part of the refrigerator compartment by providing a vent hole in the flat plate of the cooling plate. It is possible to prevent only the lower part of the refrigerator compartment from being cooled by the wind flowing through the inner box side, thereby preventing the lower part of the refrigerator compartment from being overcooled.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, by providing a projection of the inner box directly below the ventilation opening of the cooling plate, the air flowing through the inner box side is also refrigerated. In addition to being able to guide to the center of the room, the air volume to the lower part of the cooling duct can be suppressed, and reliability such as drain freezing and duct surface condensation can be improved.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the air flowing through the inner box side is also stored in the refrigerator compartment by providing a cut and raised hole in the flat plate of the cooling plate. While being able to guide to a center part, the heat exchange surface area of a cooling plate can be enlarged, and cooling efficiency can be improved.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the cooling plate is cut and raised on the inner box side so that the air flowing on the inner box side is also in the center of the refrigerator compartment. The drainage from the upper part to the lower part of the cooling plate can be improved and freezing in the cooling duct can be prevented. Moreover, the inner box back surface shape can be made flat, and the molding die for the inner box and the urethane foaming jig for the refrigerator casing can be made into a simple shape, reducing the cost and improving the moldability.

  According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, the air flowing through the inner box side is also transferred to the central part of the refrigerator compartment by forming the vent of the cooling plate with a throttle. In addition to being able to guide, the angle of the raised portion of the plate becomes uniform, the air flow in the cooling duct is rectified, the efficiency on the air side is improved, and the variation in the air volume can be reduced.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of the refrigerator in the first embodiment of the present invention. FIG. 2 is a refrigeration cycle diagram of the refrigerator according to Embodiment 1 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 20, and the refrigerator compartment 6 and the first freezer compartment 8 are partitioned by a heat insulating partition wall 19 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. An air path through which cool air flows is formed between the inner box 2 and between the cooling plate 25 and the decorative plate 21. Further, the distance B between the cooling plate 25 and the decorative plate 21 is also arranged at a position where the distance A between the cooling plate 25 and the inner box 2 becomes larger. The cooling plate 25 has a cooling pipe 23 on the decorative plate 21 side and a flat plate 24 on the inner box 2 side.

  In addition, a cooling fan 26 and a suction port 28 are arranged in the upper part, and a discharge port 29 that guides cool air to the refrigerator compartment 6 and the low temperature chamber 18 is opened in the decorative plate 21.

  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 to cool the freezer compartments 8 and 9.

  On the other hand, on the refrigerating room 6 side, the cold air cooled by the cooling plate 25 in the cooling duct 22 is discharged from the discharge port 29 in the rear surface portion of the refrigerating room 6 and the low temperature room 18, and the refrigerating room 6 and the low temperature room. 18 is cooled and sucked from the suction port 28. At that time, the cool air sucked from the suction port 28 is divided into two parts on the decorative plate 21 side and the inner box 2 side at the upper part of the cooling plate 25 in the cooling duct 22. Since the distance B between the cooling plate 25 and the decorative plate 21 is larger than the distance A between the cooling plate 25 and the inner box 2, a large amount of air flows toward the decorative plate 21 and is guided into the refrigerator compartment 6.

  As described above, in the present embodiment, a large amount of cool air flows between the cooling plate 25 and the decorative plate 21 in the cooling duct 22 and the amount of air guided into the refrigerator compartment 6 increases, so that cooling such as feeding food is performed. Even when the load amount increases, the cooling amount of the refrigerator compartment can be secured.

  Moreover, in this Embodiment, since the cooling pipe 23 with low temperature is arrange | positioned at the decorative plate 21 side with much air volume, the temperature of the air guide | induced to the refrigerator compartment 6 center part becomes low, and it can improve a cooling speed. it can.

(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, it attaches the same code | symbol and abbreviate | omits detailed description.

  FIG. 3 is a schematic diagram of a cooling plate according to Embodiment 2 of the present invention. FIG. 4 is a schematic diagram of the rear wall surface of the inner box according to Embodiment 2 of the present invention.

  The cooling plate 25 has a cooling pipe 23 arranged in a meandering manner on a flat plate 24 and is in close contact therewith. A cooling plate vent 40 is disposed on the flat plate 24 between the pipes of the cooling pipe 23. An inner box protrusion 41 is formed on the surface of the inner box 2 and is disposed immediately below the cooling plate vent 40.

  The operation and action when the cooling plate 25 configured as described above is disposed in the refrigerator 17 will be described.

  The cold air sucked from the suction port 28 is divided into two on the decorative plate 21 side and the inner box 2 side at the upper part of the cooling plate 25 in the cooling duct 22. The pressure between the decorative plate 21 and the cooling plate 25 is smaller than the pressure between the inner box 2 and the cooling plate 25 because it opens into the refrigerator compartment 6 through the discharge port 29. Accordingly, the cold air flowing between the inner box 2 and the cooling plate 25 passes through the cooling plate vent 40 due to the pressure difference, flows to the decorative plate 21 side, and is guided into the refrigerator compartment 6 from the upper opening of the discharge port 29.

  As described above, in the present embodiment, the air flowing on the inner box 2 side can also be guided to the center of the refrigerator compartment 6, and the wind flowing on the inner box 2 side cools only the lower portion of the refrigerator compartment 6 and the low temperature chamber 18. And it can prevent that the refrigerator compartment lower part and the low temperature room | chamber 18 become overcooling.

  In the present embodiment, the inner box protrusion 41 can resist the lower portion of the cooling plate vent 40, so that the air flowing on the inner box 2 side can be guided to the center of the refrigerator compartment 6 and to the lower portion of the cooling duct 22. Therefore, the reliability of drain freeze, duct surface condensation and the like can be improved.

(Embodiment 3)
Embodiment 3 according to the present invention will be described with reference to the drawings. In addition, about the same structure as Embodiment 1 and 2, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  FIG. 5 is a schematic diagram of a cooling plate according to Embodiment 3 of the present invention. FIG. 6 is a detailed perspective view of the cooling plate according to the third embodiment of the present invention. A cut-and-raised port 42 is provided in the flat plate 24 between the pipes of the cooling pipe 23. The cut and raised plate of the cut and raised opening 42 is connected to the flat plate 23 at the upper part of the hole, and is inclined to the decorative plate 21 side.

  As mentioned above, in this Embodiment, the air which flows through the inner box 2 side can also be guide | induced to the center part of the refrigerator compartment 6, the heat exchange surface area of a cooling plate becomes large, and it can improve cooling efficiency.

  Further, in the present embodiment, by forming the vent of the cooling plate with a throttle, the air flowing through the inner box can be guided to the center of the refrigerator compartment, and the angle of the raised part of the plate is uniform. Thus, the flow of air in the cooling duct can be rectified, and the efficiency on the air side can be improved. Moreover, the variation in the air volume is reduced, and the performance during mass production can be stabilized.

(Embodiment 4)
Embodiment 4 according to the present invention will be described with reference to the drawings. In addition, about the same structure as Embodiment 1-3, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  FIG. 7 is a schematic view of a cooling plate according to Embodiment 4 of the present invention. The cut and raised plate of the cut and raised opening 42 is connected to the flat plate 23 at the lower part of the hole, and is inclined to the inner box 2 side.

  As described above, in the present embodiment, the plate that has been cut and raised by the cut and raised port 42 is connected to the flat plate 23 at the bottom of the hole, and the air flowing through the inner box side is also stored in the refrigerator compartment by inclining toward the inner box 2 side. While being able to guide to a center part, the drainage from a cooling plate upper part to a lower part can be improved, and freezing in a cooling duct can be prevented. Moreover, the inner box back surface shape can be made flat, and the molding die for the inner box and the urethane foaming jig for the refrigerator casing can be made into a simple shape, reducing the cost and improving the moldability.

  As described above, the refrigerator according to the present invention can cool a cold room and a low temperature room whose temperature is lower than the cold room installed in the lower part of the cold room to a set temperature sufficiently without temperature unevenness. It can also be applied as a method.

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 Schematic of the cooling plate in Embodiment 2 of the refrigerator according to the present invention Schematic of the inner box in Embodiment 2 of the refrigerator according to the present invention Schematic of the cooling plate in Embodiment 3 of the refrigerator according to the present invention. The detailed perspective view of the cooling plate in Embodiment 3 of the refrigerator by this invention Schematic of cooling plate in Embodiment 4 of the refrigerator according to the present invention Vertical section of a conventional refrigerator

Explanation of symbols

2 Inner box 18 Low greenhouse 21 Decorative plate 22 Cooling duct 25 Cooling plate 26 Cooling fan 40 Cooling plate vent 41 Inner box projection 42 Cut and raise port

Claims (7)

  An inner box constituting the inside of the refrigerator compartment, a flat cooling plate disposed along the rear wall of the inner box, a decorative plate covering the cooling plate, and a cooling fan, the gap between the inner box and the decorative plate A cooling plate is installed, a cooling air circulation path is formed between the cooling plate and the inner box and between the cooling plate and the decorative plate, and a gap between the cooling plate and the decorative plate is a gap between the cooling plate and the inner box. Larger refrigerator.   The refrigerator according to claim 1, wherein the cooling plate is configured by a tube-on-sheet in which a cooling pipe is crimped to a flat plate, and the cooling pipe is installed on a decorative plate side.   The refrigerator according to claim 1 or 2, wherein a vent hole is provided in a flat plate of the cooling plate.   The refrigerator as described in any one of Claim 1 to 3 which provided the protrusion of the inner box directly under the ventilation port of the cooling plate.   The refrigerator as described in any one of Claim 1 to 4 which provided the cut-and-raised hole in the flat plate of the cooling plate.   The refrigerator according to any one of claims 1 to 5, wherein the cooling plate is cut and raised on the inner box side.   The refrigerator as described in any one of Claim 1 to 6 which formed the ventilation hole of the cooling plate with the aperture_diaphragm | restriction.

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