JP7069396B2 - refrigerator - Google Patents

Description

The present invention relates to a refrigerator in which a cooling chamber is formed.

Conventionally, in order to cool the inside of a drawer container arranged in a cooling chamber, a refrigerator is known in which cold air is blown out to the inside of the drawer container from an outlet provided on the inner back surface of the cooling chamber. In such a conventional refrigerator, the cold air blown out from the outlet easily flows to the refrigerator door, so that the heat outside the refrigerator easily enters the cooling chamber through the refrigerator door.

Conventionally, in order to suppress the heat from the outside of the refrigerator from entering the cooling chamber through the refrigerator door, a plate-shaped convection control unit that suppresses the flow of cold air blown out from the outlet to the door is pulled out to cool the side surface of the refrigerator. A refrigerator installed in the space between the inside side of the room and the inside side of the room has been proposed. In such a conventional refrigerator, cold air convection in the space between the convection control unit and the inner back surface of the cooling chamber, and the heat outside the refrigerator is suppressed from entering the cooling chamber through the refrigerator door. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-70743

However, in the conventional refrigerator shown in Patent Document 1, cold air easily flows from the inside of the drawer container into the space between the inner side surface of the cooling chamber and the side surface of the drawer container. When cold air flows through the space between the inner side surface of the cooling chamber and the side surface of the drawer container, the heat outside the refrigerator easily enters the cooling chamber from the inner side surface of the cooling chamber. This reduces the cooling efficiency of the refrigerator.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain a refrigerator capable of improving cooling efficiency.

The refrigerator according to the present invention is provided in a refrigerator body having a cooling chamber having an opening that opens forward, a door that is provided in the refrigerator body and can open and close the opening of the cooling chamber, and a cooling chamber. One case is provided, and the inner surface of the cooling chamber faces the bottom surface of the cooling chamber, the ceiling surface of the cooling chamber, the back surface of the cooling chamber facing the opening of the cooling chamber in the depth direction of the refrigerator body, and the width direction of the refrigerator body. It has a pair of cooling chamber side surfaces, and the first case is provided with an opening that opens upward, and the first case faces the cooling chamber ceiling surface around the opening of the first case. On the back surface of the cooling chamber, there is a first blowing part that blows cold air for the first case into the inside of the first case, and a cold air for the first case that has flowed out from the inside of the first case. A guided cold air return portion is provided, and the gap between the ceiling surface facing portion and the cooling chamber ceiling surface is first from the inside of the first case to the space between the first case and the side surface of the cooling chamber. A cold air leakage suppressing portion for suppressing the leakage of cold air for the case is provided, and the cold air leakage suppressing portion comprises a plurality of walls of a first wall member and a second wall member arranged along the depth direction of the refrigerator body, respectively. The first wall member is fixed to the ceiling surface of the cooling chamber and faces the ceiling surface facing portion through a set gap, and the second wall member faces the ceiling surface facing portion. It is fixed and faces the ceiling surface of the cooling chamber through a set gap, and the first wall member and the second wall member are arranged in the width direction of the refrigerator body.

According to the refrigerator according to the present invention, the amount of heat invading from the outside of the refrigerator into the cooling chamber can be more reliably suppressed by suppressing the leakage of the cold air blown into the first case to the outside of the first case. .. This makes it possible to improve the cooling efficiency of the refrigerator.

It is a front view which shows the refrigerator by Embodiment 1 of this invention. It is a vertical sectional view which shows the refrigerator of FIG. It is a block diagram which shows the refrigerant circuit of the refrigerating cycle apparatus of the refrigerator of FIG. It is a perspective view which shows the freezing chamber of FIG. It is a front view which shows the state when the freezing chamber of FIG. 4 is seen from the front of the refrigerator main body. FIG. 5 is a cross-sectional view taken along the line VI-VI of FIG. It is a top view which shows the state when the freezing chamber of FIG. 5 is seen from above. It is an enlarged view which shows the positional relationship between the wall member of FIG. 5 and the upper case for a freezing room. It is a perspective view which shows the numerical analysis model of the freezing chamber by the Example corresponding to Embodiment 1 of this invention. It is a perspective view which shows the numerical analysis model of the freezing room by a comparative example. It is a streamline diagram which shows the state of the flow of the cold air for 1st case by the numerical analysis of the Example of FIG. It is a streamline diagram which shows the state of the flow of the cold air for 1st case by the numerical analysis of the comparative example of FIG. It is a graph which compared the ratio of the amount of heat invasion into a freezing chamber between the example of FIG. 9 and the comparative example of FIG. It is a table which shows the measurement test result of the temperature and the power consumption, respectively, about an Example and a comparative example. It is sectional drawing of the main part which shows the other example of the refrigerator by Embodiment 1 of this invention. It is sectional drawing of the main part which shows the other example of the refrigerator by Embodiment 1 of this invention. It is sectional drawing of the main part which shows the other example of the refrigerator by Embodiment 1 of this invention. It is sectional drawing which shows the main part of the freezing chamber of the refrigerator by Embodiment 2 of this invention. It is sectional drawing of the main part which shows the other example of the refrigerator by Embodiment 2 of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1.
FIG. 1 is a front view showing a refrigerator according to the first embodiment of the present invention. Further, FIG. 2 is a vertical sectional view showing the refrigerator of FIG. 1. In the figure, in the refrigerator 1, a refrigerating room 3, a switching room 4, an ice making room 5, a freezing room 6, and a vegetable room 7 are formed in the refrigerator body 2 as a plurality of cooling rooms.

The refrigerating chamber 3 is formed at the uppermost portion of the refrigerator main body 2. The vegetable compartment 7 is formed at the bottom of the refrigerator body 2. The freezing room 6 is located above the vegetable room 7. The switching chamber 4 and the ice making chamber 5 are located between the refrigerating chamber 3 and the freezing chamber 6. When the refrigerator 1 is viewed from the front of the refrigerator body 2, as shown in FIG. 1, the switching chamber 4 is located on the right side in the width direction of the refrigerator body 2, and the ice making chamber 5 is located on the left side in the width direction of the refrigerator body 2. There is.

As shown in FIG. 2, the refrigerator main body 2 has a refrigerator outer wall portion 21 and a plurality of partition wall portions 22 fixed inside the refrigerator outer wall portion 21. Each of the refrigerating room 3, the switching room 4, the ice making room 5, the freezing room 6 and the vegetable room 7 is partitioned by a partition wall portion 22. Each of the refrigerating chamber 3, the switching chamber 4, the ice making chamber 5, the freezing chamber 6, and the vegetable compartment 7, that is, each of the cooling chambers 3 to 7, has an opening opened to the front of the refrigerator body 2 as a cooling chamber opening. ing.

The refrigerator main body 2 is provided with a plurality of doors 8 that can individually open and close the openings of the cooling chambers 3 to 7. Each of the refrigerator outer wall portion 21, each partition wall portion 22, and each door 8 is composed of a vacuum heat insulating material and a urethane heat insulating material. As a result, in the refrigerator 1, heat intrusion from the outside air of the refrigerator 1 into each of the cooling chambers 3 to 7 is suppressed.

In this example, the openings of the cooling chambers 3 to 7 are opened and closed by rotating each door 8 around an axis along the height direction of the refrigerator 1. Further, in this example, the opening of the refrigerator compartment 3 is opened and closed by two double doors 8, that is, double doors. Further, in this example, the openings of the switching chamber 4, the ice making chamber 5, the freezing chamber 6, and the vegetable chamber 7 are opened and closed by one single door 8. The door 8 that opens and closes the opening of the refrigerator compartment 3 may be a single door that opens.

A cooler chamber 23 and a cold air passage 24 extending from the cooler chamber 23 to each of the cooling chambers 3 to 7 are formed on the back surface portion of the refrigerator main body 2. The cooler chamber 23 is located at the lower part of the refrigerator main body 2.

A cooler 11 and a defrosting device 16 are arranged in the cooler chamber 23. A fan 12 is arranged at the boundary between the cooler chamber 23 and the cold air passage 24.

The cooler 11 cools the air inside the cooler chamber 23 to make it cold. The cold air cooled by the cooler 11 is sent from the cooler chamber 23 to each of the cooling chambers 3 to 7 through the cold air passage 24 by the operation of the fan 12. As a result, the temperature of each cooling chamber 3 to 7 is maintained at the set temperature.

The cold air sent to each of the cooling chambers 3 to 7 is warmed by the intrusion of outside air due to the opening / closing operation of the door 8, and then returned to the cooler chamber 23. The cold air returned from each of the cooling chambers 3 to 7 to the cooler chamber 23 is cooled again by the cooler 11, and then sent again to each of the cooling chambers 3 to 7 through the cold air passage 24. In this way, in the refrigerator 1, cold air circulates in the space inside the refrigerator main body 2.

The defrosting device 16 is a device that melts and removes the frost adhering to the cooler 11. When the door 8 is opened and closed, the outside air containing a large amount of water invades each of the cooling chambers 3 to 7. As a result, the cold air whose moisture has increased due to the outside air returns to the cooler chamber 23. Therefore, when the cold air and the cooler 11 exchange heat, frost adheres to the cooler 11. When the refrigerator 1 is operated for a long time, the frost adhering to the cooler 11 grows, and the heat exchange performance of the cooler 11 deteriorates. In the refrigerator 1, the defrosting operation of removing the frost adhering to the cooler 11 by the defrosting device 16 is periodically performed under the control of a control device (not shown). As a result, deterioration of the heat exchange performance of the cooler 11 is suppressed.

A compressor 13 is arranged at the bottom of the back surface portion of the refrigerator body 2. Further, the refrigerator 1 is provided with a refrigerating cycle device. The refrigeration cycle device has a refrigerant circuit in which a refrigerant circulates. The operation of the refrigeration cycle device is performed by the operation of the compressor 13. The cooler 11 cools the air inside the cooler chamber 23 by operating the refrigerating cycle device.

FIG. 3 is a block diagram showing a refrigerant circuit of the refrigerating cycle device in the refrigerator 1 of FIG. The refrigerant circuit of the refrigerating cycle device includes a cooler 11, a compressor 13, a piping group 14 as a condenser, and a decompression device 15. The cooler 11, the compressor 13, the piping group 14, and the depressurizing device 15 are connected via a refrigerant pipe. Isobutane or the like is used as the refrigerant in the refrigerant circuit.

In the refrigeration cycle device, when the compressor 13 operates, the refrigerant is adiabatically compressed in the compressor 13. As a result, the refrigerant becomes a high-temperature and high-pressure gas refrigerant. The high-temperature and high-pressure refrigerant compressed by the compressor 13 is sent to the piping group 14.

The piping group 14 is embedded in the refrigerator outer wall portion 21. In the piping group 14, heat exchange is performed between the outside air of the refrigerator 1 and the refrigerant. As a result, the refrigerant is condensed in the piping group 14 to become a liquid refrigerant. The liquid refrigerant condensed in the piping group 14 is sent to the decompression device 15.

As the depressurizing device 15, a capillary tube or the like is used. In the depressurizing device 15, the liquid refrigerant from the piping group 14 adiabatically expands. As a result, the refrigerant that has passed through the decompression device 15 becomes a low-temperature gas-liquid two-phase refrigerant. The gas-liquid two-phase refrigerant adiabatically expanded by the depressurizing device 15 is sent to the cooler 11.

In the cooler 11, heat exchange is performed between the refrigerant and the air in the cooler chamber 23. As a result, the refrigerant evaporates in the cooler 11 and becomes a gas refrigerant. On the other hand, the air in the cooler chamber 23 is cooled by radiating heat to the refrigerant flowing through the cooler 11. That is, the cooler 11 functions as an evaporator that evaporates the refrigerant. The gaseous refrigerant evaporated in the cooler 11 returns to the compressor 13. In this way, in the refrigerant circuit of the refrigeration cycle device, the refrigerant circulates in the order of the compressor 13, the piping group 14, the decompression device 15, the cooler 11, and the compressor 13 while changing the phase.

Here, when the openings of the cooling chambers 3 to 7 are opened and closed by the door 8, cold air leaks from the cooling chambers 3 to 7 to the outside. When cold air leaks to the outside from each of the cooling chambers 3 to 7, dew condensation is likely to occur in each of the cooling chambers 3 to 7 due to the contact of the cold air with the outside air.

As shown in FIG. 2, a part of the pipe group 14 is arranged as a condensed pipe 141 at the edge of each opening of each of the cooling chambers 3 to 7. The condensation pipe 141 is attached to each partition wall portion 22. As a result, the temperature drop of the outside air around the condensed pipe 141 is suppressed, and the generation of dew condensation in each of the cooling chambers 3 to 7 is suppressed. The position of the condensation pipe 141 may be any position as long as it can suppress the generation of dew condensation due to the leakage of cold air from each of the cooling chambers 3 to 7 to the outside.

A case 41 for the switching chamber is arranged in the switching chamber 4. Examples of the material constituting the switching chamber case 41 include resin materials such as polycarbonate and polyvinyl chloride. The switching chamber case 41 can be pulled out from the switching chamber 4 through the opening of the switching chamber 4. The switching chamber case 41 is formed with an opening that opens upward as a case opening. The cold air sent from the cold air passage 24 to the switching chamber 4 is sent to the inside of the switching chamber case 41 through the opening of the switching chamber case 41. As a result, the inside of the switching chamber case 41 is cooled.

In the vegetable compartment 7, an upper case 71 for the vegetable compartment and a lower case 72 for the vegetable compartment are arranged. Examples of the material constituting each of the upper case 71 for the vegetable room and the lower case 72 for the vegetable room include resin materials such as polycarbonate and polyvinyl chloride. Each of the vegetable compartment upper case 71 and the vegetable compartment lower case 72 is formed with an opening that opens upward as a case opening.

The vegetable compartment lower case 72 is arranged below the vegetable compartment upper case 71. Further, the upper case 71 for the vegetable room is placed on the lower case 72 for the vegetable room. In the state where the upper case 71 for the vegetable room is placed on the lower case 72 for the vegetable room, a part of the opening of the lower case 72 for the vegetable room is covered by the upper case 71 for the vegetable room.

The cold air sent from the cold air passage 24 to the vegetable compartment 7 is sent to the inside of the vegetable compartment upper case 71 through the opening of the vegetable compartment upper case 71. Further, the cold air sent from the cold air passage 24 to the vegetable compartment 7 is sent to the inside of the vegetable compartment lower case 72 through the opening of the vegetable compartment lower case 72. As a result, the insides of the upper case 71 for the vegetable room and the lower case 72 for the vegetable room are cooled.

FIG. 4 is a perspective view showing the freezing chamber 6 of FIG. Further, FIG. 5 is a front view showing a state when the freezing chamber 6 of FIG. 4 is viewed from the front of the refrigerator main body 2. Further, FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. Furthermore, FIG. 7 is a top view showing a state when the freezing chamber 6 of FIG. 5 is viewed from above. The inner surface of the freezing chamber 6 has a cooling chamber bottom surface 6a, a cooling chamber ceiling surface 6b, a cooling chamber back surface 6c, and a pair of cooling chamber side surfaces 6d. The space inside the freezing chamber 6 is surrounded by a cooling chamber bottom surface 6a, a cooling chamber ceiling surface 6b, a cooling chamber back surface 6c, and a pair of cooling chamber side surfaces 6d.

The cooling chamber ceiling surface 6b is located above the cooling chamber bottom surface 6a. Therefore, the cooling chamber ceiling surface 6b faces the cooling chamber bottom surface 6a in the height direction Z of the refrigerator main body 2. The back surface 6c of the cooling chamber faces the opening of the freezing chamber 6 in the depth direction Y of the refrigerator body 2. The pair of cooling chamber side surfaces 6d face each other in the width direction X of the refrigerator body 2.

Here, the height direction Z of the refrigerator main body 2 is the same direction as the vertical direction in the state where the refrigerator 1 is installed. Each of the width direction X and the depth direction Y of the refrigerator body 2 is a direction orthogonal to the height direction Z of the refrigerator body 2. The width direction X of the refrigerator body 2 is a direction orthogonal to the depth direction Y of the refrigerator body 2.

In the freezing chamber 6, an upper case 61 for a freezing chamber as a first case and a lower case 62 for a freezing chamber as a second case are arranged. An opening opened upward is formed as a case opening in each of the upper case 61 for the freezing room and the lower case 62 for the freezing room. As a material constituting each of the upper case 61 for the freezing room and the lower case 62 for the freezing room, resin materials such as polycarbonate and polyvinyl chloride are used.

The freezing chamber upper case 61 includes a first case main body 611 in which an opening of the freezing chamber upper case 61 is formed, and a pair of first case flanges 612 provided on the upper edge portion of the first case main body 611. Have. The first case body 611 is formed with a pair of side surfaces individually facing the pair of cooling chamber side surfaces 6d.

As shown in FIG. 5, the pair of first case flanges 612 are arranged on the upper edges of the pair of side surfaces of the first case body 611. As a result, each of the first case flanges 612 is a ceiling surface facing portion facing the cooling chamber ceiling surface 6b around the opening of the freezing chamber upper case 61. Further, the pair of first case flanges 612 protrudes outward from the first case main body 611 in a direction approaching the cooling chamber side surface 6d from the upper edge portion of the first case main body 611. Further, the pair of first case flanges 612 are arranged along the depth direction Y of the refrigerator main body 2.

The freezing room lower case 62 includes a second case main body 621 in which an opening of the freezing room lower case 62 is formed, and a pair of second case flanges 622 provided on the upper edge of the second case main body 621. Have. The second case body 621 is formed with a pair of side surfaces individually facing the pair of cooling chamber side surfaces 6d.

The pair of second case flanges 622 are arranged on the upper edges of the pair of side surfaces of the second case body 621. Further, the pair of second case flanges 622 protrudes outward from the second case main body 621 in a direction approaching the cooling chamber side surface 6d from the upper edge portion of the second case main body 621. Further, the pair of second case flanges 622 are arranged along the depth direction Y of the refrigerator main body 2.

The freezing chamber upper case 61 is arranged with a pair of first case flanges 612 facing the cooling chamber ceiling surface 6b. The freezing room lower case 62 is arranged below the freezing room upper case 61. Further, the freezing room upper case 61 is placed on the freezing room lower case 62 in a state where each first case flange 612 is overlapped with each second case flange 622. In a state where the freezing room upper case 61 is placed on the freezing room lower case 62, a part of the opening of the freezing room lower case 62 is covered by the freezing room upper case 61.

A rail 63 is fixed to each of the pair of cooling chamber side surfaces 6d along the depth direction Y of the refrigerator main body 2. The lower case 62 for the freezing room is supported by each rail 63. Further, the lower case 62 for the freezing chamber is slidable with respect to the refrigerator main body 2 along each rail 63 in the depth direction Y of the refrigerator main body 2. The freezing room upper case 61 is movable together with the freezing room lower case 62. As a result, each of the upper case 61 for the freezing room and the lower case 62 for the freezing room can be pulled out from the freezing room 6 through the opening of the freezing room 6.

As shown in FIG. 6, the back surface 6c of the cooling chamber is provided with a first blowout portion 64, a second blowout portion 65, and a cold air return portion 66. The first blowing portion 64 and the second blowing portion 65 are connected to the cold air passage 24, respectively. The cold air return portion 66 is connected to the cooler chamber 23.

The first blowing portion 64 is arranged at a position higher than that of the second blowing portion 65. The cold air return portion 66 is arranged at a position lower than each of the first blowout portion 64 and the second blowout portion 65.

The first blowing unit 64 blows the cold air sent from the cold air passage 24 to the first blowing unit 64 into the inside of the freezing chamber upper case 61 as the cold air A for the first case. The cold air A for the first case blown out from the first blowing portion 64 is sent to the inside of the freezing chamber upper case 61 through the opening of the freezing chamber upper case 61. As a result, the inside of the upper case 61 for the freezing chamber is cooled.

The second blowing portion 65 blows the cold air sent from the cold air passage 24 to the second blowing portion 65 into the inside of the lower case 62 for the freezing room as the cold air B for the second case. The cold air B for the second case blown out from the second blowing portion 65 passes through the portion of the opening of the lower case 62 for the freezing chamber that is not covered by the upper case 61 for the freezing chamber to the inside of the lower case 62 for the freezing chamber. Sent. As a result, the inside of the lower case 62 for the freezing chamber is cooled.

In the freezing chamber 6, the cold air A for the first case flowing out from the inside of the upper case 61 for the freezing chamber and the cold air B for the second case flowing out from the inside of the lower case 62 for the freezing chamber return to cold air by the suction of the fan 12. Guided to part 66. As a result, the cold air A for the first case and the cold air B for the second case warmed in the freezing chamber 6 are guided to the cold air return portion 66, respectively. The cold air A for the first case and the cold air B for the second case that have returned to the cold air return unit 66 are guided to the cooler chamber 23 and cooled again by the cooler 11.

A throat 81 protruding from the door 8 toward the space inside the freezing chamber 6 is provided on the outer peripheral portion of the door 8 that opens and closes the opening of the freezing chamber 6. When the door 8 closes the opening of the freezing chamber 6, the throat 81 is inserted into the gap between the upper case 61 for the freezing chamber and the lower case 62 for the freezing chamber and the inner surface of the freezing chamber 6. As a result, the cold air A for the first case and the cold air B for the second case are suppressed from approaching the door 8. Therefore, it becomes difficult for heat to transfer from the door 8 to the cold air A for the first case and the cold air B for the second case, and the amount of heat entering from the door 8 into the freezing chamber 6 is suppressed.

In the gap between each of the pair of first case flanges 612 and the ceiling surface 6b of the cooling chamber, a space from the inside of the upper case 61 for the freezing chamber to the space between the upper case 61 for the freezing chamber and the side surface 6d of the cooling chamber is formed. A pair of cold air leakage suppressing portions 9 for suppressing leakage of cold air A for one case are individually provided. Each cold air leakage suppressing portion 9 has a wall member 91 fixed to the ceiling surface 6b of the cooling chamber. The wall member 91 is arranged along the depth direction Y of the refrigerator body 2.

FIG. 8 is an enlarged view showing the positional relationship between the wall member 91 of FIG. 5 and the upper case 61 for the freezing room. The wall member 91 projects from the ceiling surface 6b of the cooling chamber toward the first case flange 612. Further, the wall member 91 faces the first case flange 612 via the set gap t.

In this example, the cross-sectional shape of the wall member 91 when cut in a plane orthogonal to the longitudinal direction of the wall member 91 is rectangular. It is desirable that the wall thickness of the wall member 91, that is, the dimension of the wall member 91 in the width direction X of the refrigerator body 2 is in the range of 1 [mm] to 3 [mm]. However, the wall thickness of the wall member 91 is not limited to the range of 1 [mm] to 3 [mm].

Each wall member 91 is made of a material softer than each of the freezing chamber upper case 61 and the cooling chamber ceiling surface 6b. As a result, even if the wall member 91 comes into contact with the freezing chamber upper case 61, damage to the freezing chamber upper case 61 is less likely to occur. In this example, each wall member 91 is made of a soft resin material. Examples of the soft resin material include polyvinyl chloride (PVC), olefin-based elastomer (TPO: Thermoplastic Olefinic Elactomer), and styrene-based elastomer (SBC: Styrenic Block Copolymer).

The flow of the cold air A for the first case from the inside of the upper case 61 for the freezing chamber to the space between the upper case 61 for the freezing chamber and the side surface 6d of the cooling chamber is suppressed by each wall member 91. Therefore, it becomes difficult for heat to transfer from the side surface 6d of each cooling chamber to the cold air A for the first case, and the amount of heat invading from the side surface 6d of each cooling chamber into the inside of the freezing chamber 6 is suppressed.

The flow of the cold air A for the first case from the inside of the upper case 61 for the freezing chamber to the space between the upper case 61 for the freezing chamber and the side surface 6d of the cooling chamber is between the wall member 91 and the first case flange 612. The smaller the set gap t, the more suppressed it. Therefore, it is desirable that the set gap t is 0 [mm]. However, since each of the wall member 91 and the upper case 61 for the freezing room is made of a resin material, considering that the dimensional tolerance of the resin material is ± 0.5 [mm], the set gap t is set to 0. It is impossible to set it to [mm]. Therefore, the lower limit of the set gap t is set to 1 [mm] in consideration of the dimensional tolerance of the resin material being ± 0.5 [mm].

In such a refrigerator 1, the cold air leakage suppressing portion 9 is arranged in the gap between the first case flange 612 and the ceiling surface 6b of the cooling chamber. Therefore, the flow of the cold air A for the first case from the inside of the upper case 61 for the freezing chamber to the side surface 6d of the cooling chamber can be suppressed by the cold air leakage suppressing unit 9. Thereby, the transfer of heat from the cooling chamber side surface 6d to the cold air A for the first case can be suppressed, and the heat outside the refrigerator 1 can be suppressed from entering the freezing chamber 6 from the cooling chamber side surface 6d. .. Therefore, the amount of heat invading the freezing chamber 6 can be suppressed, and unnecessary cooling of the freezing chamber 6 can be suppressed. As a result, the energy-saving performance of the refrigerator 1 can be improved, and the cooling speed of the freezing chamber 6 can be increased. Therefore, it is possible to improve the cooling efficiency of the refrigerator 1.

Further, a part of the opening of the lower case 62 for the freezing room is covered with the upper case 61 for the freezing room. Therefore, not only the flow of the cold air A for the first case from the inside of the upper case 61 for the freezing chamber to the side 6d side of the cooling chamber, but also the second case from the inside of the lower case 62 for the freezing chamber to the side 6d side of the cooling chamber. The flow of the cold air B can also be suppressed. As a result, it is possible to reduce the variation in temperature inside each of the upper case 61 for the freezing room and the lower case 62 for the freezing room. Therefore, it is possible to improve the cooling quality of the freezing chamber 6.

Further, the cold air leakage suppressing portion 9 has a wall member 91 arranged along the depth direction Y of the refrigerator main body 2. Further, the wall member 91 is fixed to the ceiling surface 6b of the cooling chamber. Further, the wall member 91 faces the freezing chamber upper case 61 via the set gap t. Therefore, the flow of the cold air A for the first case from the inside of the upper case 61 for the freezing chamber to the side surface 6d of the cooling chamber can be easily suppressed by a simple configuration.

Here, in order to confirm the effect of the cold air leakage suppressing unit 9, an embodiment corresponding to the first embodiment to which the cold air leakage suppressing unit 9 is applied and a comparative example to which the cold air leakage suppressing unit 9 is not applied. Then, a numerical analysis of the amount of heat entering the freezing chamber 6 from the outside of the freezing chamber 6 was performed.

FIG. 9 is a perspective view showing a numerical analysis model of the freezing chamber 6 according to the embodiment corresponding to the first embodiment of the present invention. Further, FIG. 10 is a perspective view showing a numerical analysis model of the freezing chamber 6 according to a comparative example. In the numerical analysis model according to the embodiment of FIG. 9, the pair of wall members 91 fixed to the ceiling surface 6b of the cooling chamber face each other with the ceiling surface facing portion of the freezing chamber upper case 61 via the set gap t. On the other hand, in the numerical analysis model according to the comparative example of FIG. 10, the pair of wall members 91 does not exist. Other configurations of the numerical analysis model are the same in the examples and the comparative examples.

In the numerical analysis, as the fluid boundary condition, the velocity of the cold air blown out from each of the first blowout portion 64 and the second blowout portion 65 was defined by the actual measurement result, and the pressure at the cold air return portion 66 was defined by 0 [Pa]. ..

As the thermal boundary condition, the temperature of the cold air blown out from each of the first blowout portion 64 and the second blowout portion 65 was set to -21 [° C.].

Further, the heat passing rate [Wm ² · K] of the refrigerator outer wall portion 21 and the partition wall portion 22 forming the cooling chamber bottom surface 6a, the cooling chamber ceiling surface 6b, the cooling chamber back surface 6c, and the pair of cooling chamber side surfaces 6d is determined. The heat transfer rate obtained from the thickness of each of the vacuum heat insulating material and the urethane heat insulating material constituting the refrigerator outer wall portion 21 and the partition wall portion 22 was set. Further, the heat transfer rate [W ・ m ²・ K] of the door 8 is also set to the heat transfer rate obtained from the respective thicknesses of the vacuum heat insulating material and the urethane heat insulating material constituting the door 8. Here, the thermal conductivity λ1 of the vacuum heat insulating material is 0.002 [W / m · K], and the thermal conductivity λ2 of the urethane heat insulating material is 0.02 [W / m · K]. The temperature of the outside air of the refrigerator 1 was set to 32 [° C.].

However, the amount of heat passing through the bottom surface 6a of the cooling chamber is the amount of heat entering the freezing chamber 6 from the vegetable compartment 7. The amount of heat passing through the ceiling surface 6b of the cooling chamber was the amount of heat entering the freezing chamber 6 from each of the switching chamber 4 and the ice making chamber 5. Further, the amount of heat passing through each of the back surface 6c of the cooling chamber, the side surface 6d of each cooling chamber, and the surface of the door 8 is the amount of heat entering the freezing chamber 6 from the outside of the refrigerator 1.

Further, in Examples and Comparative Examples, the dimension of the gap between the ceiling surface facing portion of the freezing chamber upper case 61 and the cooling chamber ceiling surface 6b was set to 15 [mm]. In the embodiment, the set gap t between the ceiling surface facing portion of the freezing chamber upper case 61 and the wall member 91 is set to 5 [mm].

FIG. 11 is a streamline diagram showing a state of flow of the cold air A for the first case by numerical analysis of the embodiment of FIG. Further, FIG. 12 is a streamline diagram showing a flow state of the cold air A for the first case by numerical analysis of the comparative example of FIG. Comparing FIGS. 11 and 12, in the embodiment of FIG. 11, the amount of cold air A for the first case leaking from the inside of the upper case 61 for the freezing chamber to the door 8 side and the cooling chamber side surface 6d side is the comparison of FIG. It can be seen that it is suppressed compared to the example.

In addition, the amount of heat invaded into the freezing chamber 6 was calculated using the numerical analysis models of the examples and comparative examples in which the above conditions were set. FIG. 13 is a graph comparing the ratio of the amount of heat entering the freezing chamber 6 between the example of FIG. 9 and the comparative example of FIG. In FIG. 13, the ratio of the amount of heat entering the freezing chamber 6 in the comparative example is 100 [%]. As shown in FIG. 13, the ratio of the amount of heat entering the freezing chamber 6 in the examples is 94 [%] with respect to 100 [%] in the comparative example. That is, in the example, the amount of heat entering the freezing chamber 6 is reduced by 6 [%] as compared with the comparative example. Therefore, in the embodiment, the effect of reducing the amount of heat invading the freezing chamber 6 from the outside of the freezing chamber 6 can be confirmed.

Next, in order to confirm the effect of the cold air leakage suppressing unit 9, a measurement test was conducted in which the temperatures of the upper case 61 for the freezing room and the lower case 62 for the freezing room 62 and the power consumption of the refrigerator 1 were measured. Each of the example and the comparative example was performed on an actual machine.

In the comparative example, the measurement test of the temperature and the power consumption was carried out with the dimension of the gap between the ceiling surface facing portion of the freezer compartment upper case 61 and the cooling chamber ceiling surface 6b set to 15 [mm]. In the embodiment, the temperature and the power consumption are respectively when the set gap t between the ceiling side edge portion of the freezer upper case 61 and the wall member 91 is set to 0 [mm] and 10 [mm], respectively. Was measured and tested.

Further, the temperature measurement test of each of the upper case 61 for the freezing room and the lower case 62 for the freezing room was performed at the temperature measuring position in accordance with the JIS standard (JISC9801). Further, the temperature of the outside air of the refrigerator 1 is 32 [° C.], and the humidity of the outside air of the refrigerator 1 is 70 [% R. H. ], A temperature measurement test was conducted. Further, in Examples and Comparative Examples, the temperature difference ΔT = (FUP-TF) [K] between the temperature FUP of the upper case 61 for the freezing chamber during steady operation and the temperature TF of the lower case 62 for the freezing chamber during steady operation. ], The temperature variation of the upper case 61 for the freezing room and the lower case 62 for the freezing room was evaluated. Here, the temperature FUP of the upper case 61 for the freezing room is the average temperature of the two points in the upper case 61 for the freezing room. The temperature TF of the lower case 62 for the freezing room was the average temperature of three points in the lower case 62 for the freezing room.

FIG. 14 is a table showing the measurement test results of each of the temperature and the power consumption for Examples and Comparative Examples. The measurement test results of the examples in FIG. 14 show the case where the set gap t is 0 [mm] and the case where the set gap t is 10 [mm], respectively.

First, the temperature variation of the upper case 61 for the freezing room and the lower case 62 for the freezing room will be examined. The comparison of the measurement test results of each of the examples and the comparative examples was carried out under the condition that the average temperature of the freezing chamber 6 was -18.6 [° C.]. Looking at FIG. 14, in the comparative example, the temperature difference ΔT is 1 [K]. On the other hand, in the embodiment when the set gap t is 0 [mm], the temperature difference ΔT is 0.3 [K], and in the embodiment when the set gap t is 10 [mm]. The temperature difference ΔT is 0.7 [K]. Therefore, it can be seen that the temperature difference ΔT is smaller than that in the comparative example in any of the examples in which the set gap t is 0 [mm] and 10 [mm]. That is, it can be confirmed that the temperature variation between the upper case 61 for the freezing room and the lower case 62 for the freezing room can be reduced by applying the cold air leakage suppressing unit 9.

Next, the cooling rate of the freezing chamber 6 will be examined. Looking at FIG. 14, in the comparative example, the operating time of the refrigerator 1 is 88 [min]. On the other hand, in the embodiment when the set gap t is 0 [mm], the operating time of the refrigerator 1 is 79 [min], and in the embodiment when the set gap t is 10 [mm]. The operating time of the refrigerator 1 is 84 [min]. Therefore, it can be seen that the operating time of the refrigerator 1 is shorter than that of the comparative example in any of the examples in which the set gap t is 0 [mm] and 10 [mm]. From this, it can be seen that the cooling rate of the freezing chamber 6 in the examples is higher than the cooling rate of the freezing chamber 6 of the comparative example. Therefore, it can be confirmed that the cooling rate of the freezing chamber 6 can be increased by applying the cold air leakage suppressing unit 9.

Next, the power consumption of the refrigerator 1 will be examined. Looking at FIG. 14, in the embodiment when the set gap t is 0 [mm], the power consumption of the refrigerator 1 is 0.3 [%] less than that in the comparative example. Further, in the embodiment when the set gap t is 0 [mm], the power consumption of the refrigerator 1 is 1.8 [%] less than that in the comparative example. Therefore, it can be seen that the power consumption of the refrigerator 1 is smaller than that of the comparative example in any of the examples in which the set gap t is 0 [mm] and 10 [mm]. As a result, it can be confirmed that the application of the cold air leakage suppressing unit 9 can reduce the power consumption of the freezing chamber 6 and improve the energy saving performance of the refrigerator 1.

Therefore, by setting the set gap t to 10 [mm] or less, the effect of applying the cold air leakage suppressing unit 9 can be obtained more reliably. On the other hand, as described above, the lower limit of the set gap t is 1 [mm] from the viewpoint of the dimensional tolerances of the wall member 91 and the freezer upper case 61. Therefore, by setting the set gap t to 1 [mm] or more and 10 [mm] or less, it is possible to more reliably suppress the invasion of heat into the freezing chamber 6, improving the energy-saving performance of the refrigerator 1 and improving the freezing chamber. It is possible to more reliably improve the cooling quality of 6.

In the above example, the wall member 91 is fixed to the ceiling surface 6b of the cooling chamber. However, the wall member 91 may be fixed to the first case flange 612, which is the portion facing the ceiling surface of the upper case 61 for the freezing room. In this case, the wall member 91 faces the cooling chamber ceiling surface 6b via the set gap t. Even in this way, the flow of the cold air A for the first case from the inside of the upper case 61 for the freezing chamber to the side surface 6d of the cooling chamber can be suppressed by the cold air leakage suppressing unit 9.

Further, in the above example, the cross-sectional shape of the wall member 91 when cut in a plane orthogonal to the longitudinal direction of the wall member 91 is rectangular. However, the cross-sectional shape of the wall member 91 is not limited to a rectangle. For example, as shown in FIG. 15, the cross-sectional shape of the wall member 91 may be a triangle with a sharp tip. Further, as shown in FIG. 16, the cross-sectional shape of the wall member 91 may be a shape in which the tip portion is rounded.

Further, in the above example, the number of wall members 91 included in each cold air leakage suppressing unit 9 is one. However, as long as the cold air leakage suppressing portion 9 fits in the gap between the cooling chamber ceiling surface 6b and the first case flange 612, the number of wall members 91 included in each cold air leakage suppressing portion 9 may be a plurality. good. In this case, as shown in FIG. 17, the plurality of wall members 91 are fixed to the cooling chamber ceiling surface 6b in a state of being arranged in the width direction of the refrigerator main body 2 at intervals from each other. By doing so, the flow of the cold air A for the first case from the inside of the upper case 61 for the freezing chamber to the side surface 6d of the cooling chamber can be more reliably suppressed, and the amount of heat invading the freezing chamber 6 can be reduced. It can be reduced more reliably.

Further, when the number of wall members 91 included in each cold air leakage suppressing portion 9 is a plurality, the plurality of wall members 91 may be fixed to the first case flange 612. In this case, the plurality of wall members 91 are arranged in the width direction of the refrigerator body 2.

Embodiment 2.
FIG. 18 is a cross-sectional view showing a main part of the freezing chamber of the refrigerator according to the second embodiment of the present invention. Each cold air leakage suppressing portion 9 has a plurality of walls including a first wall member 92 fixed to the ceiling surface 6b of the cooling chamber and a second wall member 93 fixed to the first case flange 612 of the upper case 61 for the freezing chamber. It has as a member.

Each of the first wall member 92 and the second wall member 93 is arranged along the depth direction Y of the refrigerator main body 2. The materials constituting each of the first wall member 92 and the second wall member 93 are the same as the materials constituting the wall member 91 of the first embodiment. Further, in this example, the cross-sectional shapes of the first wall member 92 and the second wall member 93 are rectangular. However, the cross-sectional shape of each of the first wall member 92 and the second wall member 93 is not limited to a rectangle, and may be the same as the cross-sectional shape of the wall member 91 shown in FIGS. 15 and 16.

The first wall member 92 and the second wall member 93 are arranged in the width direction X of the refrigerator body 2 at intervals from each other. In this example, the second wall member 93 is arranged at a position closer to the cooling chamber side surface 6d than the first wall member 92.

The first wall member 92 projects from the cooling chamber ceiling surface 6b toward the first case flange 612. Further, the first wall member 92 faces the first case flange 612 via the set gap t1. In this example, the set gap t1 is 1 [mm] or more and 10 [mm] or less.

The second wall member 93 projects from the first case flange 612 toward the cooling chamber ceiling surface 6b. Further, the second wall member 93 faces the ceiling surface 6b of the cooling chamber via the set gap t2. In this example, the set gap t2 is 1 [mm] or more and 10 [mm] or less. Other configurations are the same as those in the first embodiment.

In such a refrigerator 1, the cold air leakage suppressing portion 9 is fixed to the first wall member 92 fixed to the ceiling surface 6b of the cooling chamber and the second wall member fixed to the first case flange 612 of the upper case 61 for the freezing chamber. It has 93 and. Therefore, the flow of the cold air A for the first case from the inside of the upper case 61 for the freezing chamber to the side surface 6d of the cooling chamber can be suppressed by each of the first wall member 92 and the second wall member 93. As a result, the amount of cold air A for the first case flowing from the inside of the upper case 61 for the freezing chamber to the side surface 6d of the cooling chamber can be suppressed more reliably, and the amount of heat entering the freezing chamber 6 can be more reliably suppressed. Can be reduced.

In the above example, the second wall member 93 is arranged at a position closer to the cooling chamber side surface 6d than the first wall member 92. However, as shown in FIG. 19, the second wall member 93 may be arranged at a position closer to the cooling chamber side surface 6d than the second wall member 93.

Further, in the above example, the number of the first wall members 92 included in each cold air leakage suppressing unit 9 is one. However, as long as the cold air leakage suppressing portion 9 fits in the gap between the cooling chamber ceiling surface 6b and the first case flange 612, the number of the first wall members 92 included in each cold air leakage suppressing portion 9 is increased. You may. In this case, the plurality of first wall members 92 are fixed to the cooling chamber ceiling surface 6b in a state of being arranged in the width direction of the refrigerator main body 2 at intervals from each other.

Further, in the above example, the number of the second wall members 93 included in each cold air leakage suppressing unit 9 is one. However, as long as the cold air leakage suppressing portion 9 fits in the gap between the cooling chamber ceiling surface 6b and the first case flange 612, the number of the second wall members 93 included in each cold air leakage suppressing portion 9 is increased. You may. In this case, the plurality of second wall members 93 are fixed to the first case flange 612 in a state of being arranged in the width direction of the refrigerator main body 2 at intervals from each other.

Further, in each of the above-described embodiments, the lower case 62 for the freezing chamber is slidable along the rail 63 in the depth direction Y of the refrigerator body 2. However, by fixing a rail different from the rail 63 to the pair of cooling chamber side surfaces 6d, the freezing chamber upper case 61 may be slidable along the other rail in the depth direction Y of the refrigerator body 2. In this way, the upper case 61 for the freezing chamber can be pulled out from the freezing chamber 6 independently of the lower case 62 for the freezing chamber.

Further, in each of the above embodiments, the cold air leakage suppressing unit 9 is applied to the freezing chamber 6 in which the upper case 61 for the freezing chamber and the lower case 62 for the freezing chamber are arranged. However, the cold air leakage suppressing unit 9 may be applied to the freezing chamber 6 in which one freezing chamber case is arranged as the first case. In this case, the cold air leakage suppressing portion 9 is provided in the gap between the ceiling surface facing portion of the freezing chamber case and the cooling chamber ceiling surface 6b.

Further, in each of the above embodiments, the cold air leakage suppressing unit 9 is applied to the freezing chamber 6 in which the upper case 61 for the freezing chamber and the lower case 62 for the freezing chamber are arranged. However, in addition to the freezing room upper case 61 and the freezing room lower case 62, another freezing room case may be arranged in the freezing room 6.

Further, in each of the above-described embodiments, the cold air leakage suppressing unit 9 may be applied to the switching chamber 4 in which the switching chamber case 41 is arranged. In this case, the switching chamber case 41 is arranged as the first case in the switching chamber 4. Further, the cold air leakage suppressing portion 9 is provided in the gap between the ceiling surface facing portion of the switching chamber case 41 as the first case and the cooling chamber ceiling surface of the switching chamber 4. By doing so, the amount of heat entering the switching chamber 4 can be suppressed by the cold air leakage suppressing unit 9.

Further, in each of the above-described embodiments, the cold air leakage suppressing unit 9 may be applied to the vegetable compartment 7 in which the upper case 71 for the vegetable compartment and the lower case 72 for the vegetable compartment are arranged. In this case, the upper case 71 for the vegetable room is arranged in the vegetable room 7 as the first case, and the lower case 72 for the vegetable room is arranged in the vegetable room 7 as the second case. Further, the cold air leakage suppressing portion 9 is provided in the gap between the ceiling surface facing portion of the vegetable compartment upper case 71 as the first case and the cooling chamber ceiling surface of the vegetable compartment 7. By doing so, the amount of heat invading the vegetable compartment 7 can be suppressed by the cold air leakage suppressing unit 9.

1 Refrigerator, 2 Refrigerator body, 6 Refrigerator room (cooling room), 6a Cooling room bottom, 6b Cooling room ceiling surface, 6c Cooling room back, 6d Cooling room side, 8 doors, 9 Cold air leakage control part, 61 Freezer room top Case (1st case), 62 Lower case for freezer (2nd case), 64 1st blowout part, 65 2nd blowout part, 66 Cold air return part, 91 wall member, 92 1st wall member, 93 2nd wall Member, 612 1st case flange (ceiling surface facing portion).

Claims (4)

Refrigerator body, in which a cooling chamber is formed with an opening that opens forward,
A door provided in the refrigerator body and capable of opening and closing the opening of the cooling chamber, and a first case arranged in the cooling chamber are provided.
The inner surface of the cooling chamber is a pair of a cooling chamber bottom surface, a cooling chamber ceiling surface, a cooling chamber back surface facing the opening of the cooling chamber in the depth direction of the refrigerator body, and a pair facing each other in the width direction of the refrigerator body. Has a cooling chamber side and
The first case is provided with an opening that opens upward.
The first case has a ceiling surface facing portion facing the ceiling surface of the cooling chamber around the opening of the first case.
On the back surface of the cooling chamber, there is a first blowing portion for blowing cold air for the first case into the inside of the first case, and a cold air returning portion for guiding the cold air for the first case flowing out from the inside of the first case. It is provided,
The cold air for the first case leaks from the inside of the first case to the space between the first case and the side surface of the cooling chamber in the gap between the ceiling surface facing portion and the ceiling surface of the cooling chamber. There is a cold air leakage suppression part that suppresses
The cold air leakage suppressing portion has a first wall member and a second wall member arranged along the depth direction of the refrigerator body as a plurality of wall members.
The first wall member is fixed to the ceiling surface of the cooling chamber and faces the ceiling surface facing portion via a set gap.
The second wall member is fixed to the ceiling surface facing portion and faces the cooling chamber ceiling surface through a set gap.
The first wall member and the second wall member are refrigerators arranged in the width direction of the refrigerator body . A second case located in the cooling chamber and below the first case is provided.
The second case is provided with an opening that opens upward.
A part of the opening of the second case is covered by the first case.
On the back surface of the cooling chamber, a second blowing portion for blowing cold air for the second case into the inside of the second case is provided.
The refrigerator according to claim 1, wherein the cold air for the second case flowing out from the inside of the second case is guided to the cold air return portion. The refrigerator according to claim 1 or 2 , wherein the set gap is 1 [mm] or more and 10 [mm] or less. The refrigerator according to any one of claims 1 to 3 , wherein the wall member is made of a material softer than the first case and the ceiling surface of the cooling chamber.

Images