JP6790279B2 - refrigerator - Google Patents

Description

The present invention relates to a refrigerator in which a vacuum heat insulating material is arranged on each wall portion that partitions the storage chamber.

In a conventional refrigerator, the refrigerator room, the ice making room, the freezing room, and the vegetable room are laid out in this order from the top. In the case of this layout, the vegetable compartment is located at the lowest position of the refrigerator. For this reason, the user had to bend his knees and crouch or bend his hips to remove the vegetables from the vegetable compartment.

Here, when comparing the number of times the door is opened and closed or the door opening time between the vegetable room and the freezing room, although there are individual differences, the vegetable room has more door opening and closing times, and the door opening time is also longer. long. Therefore, it is expected that the convenience of the refrigerator as a whole will be improved if the positions of the vegetable compartment and the freezing compartment are exchanged and the vegetable compartment is arranged above the freezing chamber.

However, the conventional refrigerator has a configuration in which a plurality of chambers in the freezing temperature zone are gathered in one place in order to first improve the thermal efficiency.
In the conventional refrigerator, secondly, a cooler is arranged on the back surface of the freezing chamber, and even if no special heat insulating component is provided between the freezing chamber and the cooler, problems such as dew or frosting occur. It has a difficult structure.

On the other hand, in order to improve the convenience of the user, it is conceivable that the refrigerators are laid out in the order of the refrigerator compartment, the ice making chamber, the vegetable compartment, and the freezer compartment from the top. In this refrigerator, the storage chambers in the refrigerating temperature zone, that is, the positive temperature zone, and the storage chambers in the freezing temperature zone, that is, the negative temperature zone are alternately arranged from the top. For this reason, refrigerators with such a layout are firstly inferior in thermal efficiency to conventional refrigerators. Further, in order to secure the necessary heat insulating performance, the thickness of the wall portion of each room is increased, and the space for storing food is smaller than that when the outer shape of the refrigerator is the same.

In addition, in the refrigerator with such a layout, the cooler is secondly arranged on the back side of the vegetable compartment, and the wall portion separating the vegetable compartment and the cooler is provided with higher heat insulation performance than before. There is a need. In order to improve the heat insulating performance, the thickness of the wall portion may be increased. However, as mentioned above, the food storage space is sacrificed. Therefore, conventionally, as the heat insulating part, a molded product of Styrofoam, which has good workability and is convenient for attachment / detachment or transport, has been used. However, by using a vacuum heat insulating material with higher heat insulating performance as the heat insulating component, it is possible to achieve both heat insulating performance and securing food storage space. High heat insulation performance means that the heat transfer coefficient is small.

Japanese Unexamined Patent Publication No. 2012-242072

When the vacuum heat insulating material is arranged between the vegetable compartment and the cooler, an air passage for sending the air cooled by the cooler to the vegetable compartment is required. Claim 10 of Patent Document 1 describes that "the vacuum heat insulating material is provided on the front surface of the partition wall constituting the inner wall surface other than the inlet and the outlet". In this way, there is a method of covering everything other than the inlet and outlet with the vacuum heat insulating material. However, in that case, it becomes necessary to make a hole in the vacuum heat insulating material, provide a notch in the vacuum heat insulating material, or use a plurality of vacuum heat insulating materials. Therefore, the manufacturing cost increases.
In addition, the air passage had to be formed in a limited space, and the air passage configuration was complicated.

The present invention is for solving the above problems, and an object of the present invention is to provide a refrigerator having a simplified air passage configuration.

The refrigerator according to the present invention has a first storage chamber in a refrigerating temperature zone having a front portion and a back portion, a second storage chamber in a refrigerating temperature zone having a front portion and a back portion, and a front portion and a front portion. A third storage chamber in a refrigerating temperature zone having a back surface and arranged between the first storage chamber and the second storage chamber, and a cooler provided on the back surface side of the third storage chamber. And the vacuum heat insulating material provided on each wall portion including the front surface portion and the back surface portion and partitioning the third storage chamber, and the rear of the vacuum heat insulating material provided on the back surface portion of the third storage chamber. The first air passage for introducing air from the cooler into the second storage chamber and the vacuum heat insulating material provided on the back surface of the third storage chamber are formed in the second. A second air passage for returning the air used in the storage chamber to the cooler and a third air passage for returning the air used in the third storage chamber to the cooler through the return port are provided. The first air passage and the second air passage are formed so as to overlap each other in the front-rear direction, and each is branched into two in the width direction of the vacuum heat insulating material, and the air flowing through the first air passage is from the lower end of the vacuum heat insulating material. The air that is blown out from below and flows through the second air passage is introduced from below the lower end of the vacuum heat insulating material, and the return port is formed below the vacuum heat insulating material, and in a front view state. It is the back surface of the third storage chamber and is formed between the first air passage and the second air passage branched .

According to the refrigerator according to the present invention, the first air passage and the second air passage are formed so as to overlap each other in the front-rear direction and are branched into two in the width direction of the vacuum heat insulating material, which complicates the air passage configuration. It is possible to simplify the air passage configuration without this.

It is an external perspective view which shows typically an example of the refrigerator which concerns on Embodiment 1 of this invention. It is a schematic front view which shows schematic the layout of the storage room of the refrigerator which concerns on Embodiment 1 of this invention. It is a refrigerant circuit block diagram which shows typically an example of the refrigerant circuit structure of the refrigerator which concerns on Embodiment 1 of this invention. It is sectional drawing which shows schematicly the cross section of a part of the wall part of the box body of the refrigerator which concerns on Embodiment 1 of this invention. It is a schematic diagram for demonstrating the air circulation path of the refrigerator which concerns on Embodiment 1 of this invention. It is sectional drawing which shows roughly the ZZ cross section of FIG. It is explanatory drawing which shows schematic the air flow of the refrigerator which concerns on Embodiment 1 of this invention. It is sectional drawing which shows by enlarging the cross section of a part of the refrigerator which concerns on Embodiment 2 of this invention. It is a schematic diagram for demonstrating the air circulation path of the refrigerator which concerns on Embodiment 3 of this invention. 9 is a cross-sectional view schematically showing a YY cross section of FIG. It is explanatory drawing which shows typically the return of the air to the cooler of the refrigerator which concerns on Embodiment 3 of this invention. It is sectional drawing which shows by enlarging a part of the cross section of the refrigerator which concerns on Embodiment 4 of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In each figure, those having the same reference numerals are the same or equivalent thereof, and they are common in the entire text of the specification.
Furthermore, the forms of the components shown in the full text of the specification are merely examples and are not limited to these descriptions.

Embodiment 1.
FIG. 1 is an external perspective view schematically showing an example of a refrigerator 1 according to a first embodiment of the present invention. FIG. 2 is a schematic front view schematically showing the layout of the storage room of the refrigerator 1. The configuration of the refrigerator 1 will be described with reference to FIGS. 1 and 2. In the following description, the refrigerating room 11, the ice making room 21, the temperature switching room 22, the vegetable room 31, and the freezing room 41 may be collectively referred to as each storage room.

As shown in FIG. 2, the refrigerator 1 is laid out in the order of the refrigerating chamber 11, the ice making chamber 21, the temperature switching chamber 22, the vegetable compartment 31, and the freezing chamber 41 from the top. The ice making chamber 21 and the temperature switching chamber 22 are laid out so as to be adjacent to each other, the ice making chamber 21 is located on the left side of the paper surface, and the temperature switching chamber 22 is located on the right side of the paper surface.
The ice making chamber 21 and the temperature switching chamber 22 are storage chambers in the freezing temperature zone. The vegetable compartment 31 is a storage chamber in the refrigerating temperature zone. The freezing chamber 41 is a storage chamber in the freezing temperature zone.
The ice making chamber 21 corresponds to the first storage chamber of the present invention.
The freezing chamber 41 corresponds to the second storage chamber of the present invention.
The vegetable compartment 31 corresponds to the third storage chamber of the present invention.

The refrigerating room 11, the ice making room 21, the temperature switching room 22, the vegetable room 31, and the freezing room 41 are partitioned by a partition that serves as a wall. The wall portion will be described with reference to FIG.
The refrigerating room 11 and the ice making room 21 are separated by a partition 51A. The refrigerating chamber 11 and the temperature switching chamber 22 are partitioned by a partition 51B. The ice making chamber 21 and the temperature switching chamber 22 are partitioned by a partition 52 composed of one plate-shaped member. The ice making room 21 and the vegetable room 31 are separated by a partition 53A. The temperature switching chamber 22 and the vegetable compartment 31 are separated by a partition 53B. The vegetable compartment 31 and the freezing chamber 41 are partitioned by a partition 54 composed of one plate-shaped member.

Although the partition 51A and the partition 51B are composed of one plate-shaped member, they are described separately for convenience according to the ice making chamber 21 and the temperature switching chamber 22. In the following description, when it is not necessary to explain the partition 51A and the partition 51B separately, they are collectively referred to as the partition 51.
Similarly, although the partition 53A and the partition 53B are composed of one plate-shaped member, they are described separately for convenience according to the ice making chamber 21 and the temperature switching chamber 22. In the following description, when it is not necessary to explain the partition 53A and the partition 53B separately, they are collectively referred to as the partition 53.

The refrigerator 1 includes a box body 50 composed of a vertically long rectangular parallelepiped. The box body 50 has a front surface portion 50A, an upper surface portion 50B, a bottom surface portion 50C, a right side surface portion 50D, a left side surface portion 50E, and a back surface portion 50F. The box body 50 has a partition 51A, a partition 51B, a partition 52, a partition 53A, a partition 53B, and each storage chamber in which the internal space of the box body 50 is partitioned by the partition 54. A door portion that can be opened and closed is provided on the front portion 50A, which is the front surface of the box body 50. As shown in FIG. 1, the door portion of the refrigerating chamber 11 is the door portion 11A, the door portion of the ice making chamber 21 is the door portion 21A, the door portion of the temperature switching chamber 22 is the door portion 22A, and the door portion of the vegetable compartment 31 is the door portion. The door portion of 31A and the freezer compartment 41 is shown as the door portion 41A.

The door portion 11A of the refrigerating chamber 11 is configured to open left and right from the central portion via hinges (not shown) provided on the left and right sides in the width direction of the box body 50. The door portion 11A may be used as one, and the box body 50 may be configured to open from one of the left and right sides in the width direction. The door portion 21A of the ice making chamber 21 is configured as a drawer door that moves in the front-rear direction of the refrigerator 1. The door portion 22A of the temperature switching chamber 22 is configured as a drawer door that moves in the front-rear direction of the refrigerator 1. The door portion 31A of the vegetable compartment 31 is configured as a drawer door that moves in the front-rear direction of the refrigerator 1. The door portion 41A of the freezing chamber 41 is configured as a drawer door that moves in the front-rear direction of the refrigerator 1.

FIG. 3 is a refrigerant circuit configuration diagram schematically showing an example of the refrigerant circuit configuration of the refrigerator 1. The refrigerant circuit 70 and the air circulation path 80 of the refrigerator 1 will be schematically described with reference to FIG. In FIG. 3, the flow of the refrigerant and the air is indicated by arrows. Further, in FIG. 3, each storage chamber is illustrated for the purpose of explaining the air circulation path 80. Further, the refrigerant used in the refrigerant circuit 70 is not particularly limited.

The configuration of the refrigerant circuit 70 will be described.
The refrigerator 1 has a refrigerant circuit 70. As shown in FIG. 3, the refrigerant circuit 70 includes a compressor 71, an air-cooled condenser 72, a heat radiating pipe 73, a decompression device 76, and a cooler 600 connected by piping. A dew prevention pipe 74 and a dryer 75 are connected between the heat radiating pipe 73 and the decompression device 76. Further, in FIG. 3, a state in which a blower 800 for supplying air to the cooler 600 is installed is shown as an example.

The operation of the refrigerant circuit 70 will be described.
When the compressor 71 is driven, the refrigerant is discharged from the compressor 71. The refrigerant discharged from the compressor 71 flows into the air-cooled condenser 72 installed in the machine room formed in the box body 50. The refrigerant flowing out of the air-cooled condenser 72 circulates in the heat radiating pipe 73 installed inside the urethane of the box body 50 of the refrigerator 1. Then, the refrigerant that has passed through the heat radiating pipe 73 circulates through the dew prevention pipe 74 that is stretched around the front portion 50A of the storage chamber of the refrigerator 1. The refrigerant is condensed by a condensation process by the air-cooled condenser 72, the heat dissipation pipe 73, and the dew prevention pipe 74.

The condensed refrigerant is supplied to the cooler 600 via the decompression device 76 after passing through the dryer 75. When the refrigerant supplied to the cooler 600 evaporates, the cooler 600 forcibly exchanges heat with the air internally circulated by the blower 800 to generate cold air. The generated cold air is supplied to each storage chamber to cool each storage chamber. After that, the temperature of the refrigerant rises while exchanging heat with the decompression device 76 via the suction pipe, and returns to the compressor 71.
As described above, the refrigerator 1 has a refrigerant circuit 70, and cold air for cooling each storage chamber is generated.

The configuration of the air circulation path 80 will be described.
Refrigerator 1 has an air circulation path 80. The air circulation path 80 includes a blowout air passage 110 and a return air passage 140. The blowout air passage 110 introduces cold air into each storage chamber. Further, the return air passage 140 guides the cold air used for cooling in each storage chamber to the cooler 600. That is, the air circulation path 80 is a path for circulating cold air to the cooler 600 and each storage chamber via the outlet air passage 110 and the return air passage 140.

An air volume adjusting device is installed at the entrance of the blowout air passage 110. The air volume adjusting device installed at the entrance of the refrigerator compartment 11 is the first damper 101. The air volume adjusting device installed at the entrance of the ice making chamber 21 is the second damper 201a. The air volume adjusting device installed at the entrance of the temperature switching chamber 22 is the third damper 202. The air volume adjusting device installed at the entrance of the vegetable compartment 31 is the fourth damper 301.

The operation of the air circulation path 80 will be described.
By driving the blower 800, the air in the refrigerator 1 is supplied to the cooler 600. Then, the air that is forcibly circulated internally by the blower 800 exchanges heat with the refrigerant in the cooler 600 and is cooled. The cold air generated by the heat exchange in the cooler 600 flows through the blowout air passage 110 and is blown out to each storage chamber in the refrigerator 1 to cool each storage chamber.

The air circulating between each storage chamber and the cooler 600 is subjected to each air volume by a control device (not shown) according to the air temperature in the storage chamber or the temperature of the stored food detected by a temperature sensor (not shown) installed in each storage chamber. The regulator is operated to keep each storage room at an appropriate temperature. The air used for cooling in each storage chamber flows through the return air passage 140 and returns to the cooler 600.

FIG. 4 is a cross-sectional view schematically showing a cross section of a part of the wall portion 55 of the box body 50 of the refrigerator 1. The wall portion 55 of the box body 50 of the refrigerator 1 will be described with reference to FIG.
As shown in FIG. 4, the wall portion 55 of the box body 50 of the refrigerator 1 is located between the sheet metal 56 forming the outer shell, the inner box 57 forming the inner wall of each storage chamber, and the sheet metal 56 and the inner box 57. It is composed of the installed heat insulating material 500 and suppresses the amount of heat entering from the outside. The wall portion 55 constitutes a partition 51A, a partition 51B, a partition 52, a partition 53A, a partition 53B, and a partition 54.

At least for the wall portion 55 constituting the right side surface portion 50D and the left side surface portion 50E of the refrigerator 1, it is preferable to use a heat insulating material 500 having a multilayer structure of a vacuum heat insulating material and a urethane foam material. The heat insulating performance can be improved by using the heat insulating material 500 as a multi-layer structure of the vacuum heat insulating material and the urethane foam material.

Regarding the vacuum heat insulating material, not only the wall portion 55 constituting the right side surface portion 50D and the left side surface portion 50E of the refrigerator 1, but also at least the wall portion 55 constituting the upper surface portion 50B, the bottom surface portion 50C, and the back surface portion 50F of the refrigerator 1. It can also be installed in either. By installing the vacuum heat insulating material, the heat insulating performance can be further improved. Further, by mounting the vacuum heat insulating material, the distance between the outer shell of the refrigerator 1 and the inner wall surface of the inner box 57, that is, the heat insulating thickness can be narrowed, and the internal volume can be increased.

In the heat insulating material 500, various internal members such as a reinforcing member for correcting the distortion of the refrigerator 1, the above-mentioned refrigerant circuit component, and an electric wiring component are arranged in a space for enclosing the urethane foam material, and these are inscribed. The member is fixed with urethane foam material.

The coverage area of the vacuum heat insulating material arranged in the heat insulating material 500 secures 40% or more of the total outer surface area including the door surface area of each storage chamber. The urethane foam material sealed around these vacuum heat insulating materials secures a foaming density of 60 kg / cm ³ or more and a flexural modulus of 15.0 MPa or more. By doing so, it becomes possible to secure the strength of the box body 50 of the refrigerator 1.

FIG. 5 is a schematic view for explaining the air circulation path 80 of the refrigerator 1. FIG. 6 is a cross-sectional view schematically showing a ZZ cross section of FIG. FIG. 7 is an explanatory diagram schematically showing the air flow of the refrigerator 1. The air circulation path 80 in the refrigerator 1 will be described in detail with reference to FIGS. 5 to 7. In FIGS. 5 to 7, the flow of air is indicated by an arrow. Note that FIG. 5 shows an example in which a chilled room is installed in the refrigerating room 11.

First, the arrangement of the cooler 600 will be described.
As shown in FIG. 6, a cooler chamber 27 is formed on the back surface 50F side of the ice making chamber 21, the temperature switching chamber 22, and the vegetable compartment 31 of the box body 50 of the refrigerator 1. The cooler 600 is arranged in the cooler chamber 27.

A heater 700 is installed below the cooler 600. The heater 700 is provided in order to avoid obstruction of the fifth return air passage 412 due to frost formation, and is energized as necessary to generate heat.
Further, a drip heater (not shown) may be installed in a drip tray (not shown). Below the cooler chamber 27, a drip tray that receives the molten water at the time of defrosting is provided. The drip tray may be provided with a drip heater in order to avoid refreezing of the molten water received by the drip tray, and heat may be generated as necessary. The drip heater is not indispensable, and the heater 700 may also be used.

Next, the vegetable compartment 31 and the periphery of the vegetable compartment 31 will be described.
As shown in FIG. 6, the vegetable compartment 31 houses the first vegetable compartment storage case 420A and the second vegetable compartment storage case 420B. The second vegetable compartment storage case 420B is arranged above the first vegetable compartment storage case 420A, and has a volume smaller than that of the first vegetable compartment storage case 420A.
The number of storage cases to be stored in the vegetable compartment 31 is not particularly limited, but at least the first vegetable compartment storage case 420A and the second vegetable compartment storage case 420B may be stored.

Further, as shown in FIG. 6, a lid structure 430 that covers almost the entire upper open surface of the second vegetable compartment storage case 420B is installed near the upper surface portion of the vegetable compartment 31. The lid structure 430 has a fin portion 430A whose portion located on the back side of the second vegetable compartment storage case 420B is bent downward. The fin portion 430A is formed by bending a part of the lid structure 430 at an acute angle.
Further, as shown in FIG. 6, a vacuum heat insulating material 500A is arranged in front of and below and above and below the vegetable chamber 31 as a part of the heat insulating material 500 so as to surround the front and back and above and below of the vegetable chamber 31. The vacuum heat insulating material 500A is also arranged on the left and right sides of the vegetable chamber 31 as a part of the heat insulating material 500, but it is omitted in FIG.

Next, the air passage configuration of the refrigerator 1 will be specifically described.
As described above, the refrigerator 1 has an outlet air passage 110 and a return air passage 140.
The outlet air passages 110 are the first outlet air passage 111, the second outlet air passage 211a, the third outlet air passage 212, the fourth outlet air passage 311, the fifth outlet air passage 411, and the sixth outlet air passage 211b. It is composed.
The return air passage 140 is composed of a first return air passage 141, a second return air passage 241a, a third return air passage 242, a fourth return air passage 312, and a fifth return air passage 412.
It should be noted that each outlet air passage and each return air passage described below are formed in the space on the back side of each storage chamber, that is, on the back surface 50F side, and each outlet and each return port are on the back surface of each storage chamber. It is formed on the 50th floor.

The first outlet air passage 111 functions as a refrigerating chamber outlet air passage through which cold air blown into the refrigerating chamber 11 flows. A first damper 101, which is one of the air volume adjusting devices, is provided at the cold air inlet of the first blowout air passage 111. The first damper 101 is located below the refrigerator compartment 11 when the refrigerator 1 is viewed from the front. The operation of the first damper 101 is controlled by the control device as described above. As a result, the amount of cold air blown out to the refrigerating chamber 11 is adjusted.

Further, a first outlet 121 is formed in the first outlet air passage 111. The cold air flowing through the first outlet air passage 111 is introduced into the refrigerating chamber 11 via the first outlet 121. The plurality of first outlets 121 are arranged so as to be arranged in the height direction of the refrigerator compartment 11 when the refrigerator 1 is viewed from the front. Although the number of the first outlets 121 is not particularly limited, a plurality of the first outlets 121 may be installed according to the volume of the refrigerator compartment 11.

The second blowing air passage 211a functions as an ice making chamber blowing air passage through which cold air blown into the ice making chamber 21 flows. A second damper 201a, which is one of the air volume adjusting devices, is provided at the cold air inlet of the second blowout air passage 211a. The second damper 201a is located in the middle of the ice making chamber 21 with the refrigerator 1 viewed from the front. The operation of the second damper 201a is controlled by the control device as described above. As a result, the air volume of the cold air blown out to the ice making chamber 21 is adjusted.

Further, a second outlet 221a is formed in the second outlet air passage 211a. The cold air flowing through the second outlet air passage 211a is introduced into the ice making chamber 21 via the second outlet 221a. The second outlet 221a is located on the upper left side of the ice making chamber 21 when the refrigerator 1 is viewed from the front. The number of second outlets 221a is not particularly limited.

The third outlet air passage 212 functions as a temperature switching chamber outlet air passage through which cold air blown into the temperature switching chamber 22 flows. A third damper 202, which is one of the air volume adjusting devices, is provided at the cold air inlet of the third blowout air passage 212. The third damper 202 is located in the middle of the temperature switching chamber 22 when the refrigerator 1 is viewed from the front. The operation of the third damper 202 is controlled by the control device as described above. As a result, the amount of cold air blown out to the temperature switching chamber 22 is adjusted.

Further, a third outlet 222 is formed in the third outlet 212. The cold air flowing through the third outlet air passage 212 is introduced into the temperature switching chamber 22 via the third outlet 222. The third outlet 222 is located at the center of the upper part of the temperature switching chamber 22 when the refrigerator 1 is viewed from the front. The number of the third outlet 222 is not particularly limited.

The fourth outlet air passage 311 functions as a vegetable chamber outlet air passage through which cold air blown into the vegetable chamber 31 flows. A fourth damper 301, which is one of the air volume adjusting devices, is provided at the cold air inlet of the fourth blowout air passage 311. The fourth damper 301 is located in the middle of the temperature switching chamber 22 when the refrigerator 1 is viewed from the front. The operation of the fourth damper 301 is controlled by the control device as described above. As a result, the amount of cold air blown out to the vegetable compartment 31 is adjusted.

Further, a fourth outlet 321 is formed in the fourth outlet air passage 311. The cold air flowing through the fourth outlet air passage 311 is introduced into the vegetable compartment 31 via the fourth outlet 321. The fourth outlet 321 is located on the upper right side of the vegetable compartment 31 when the refrigerator 1 is viewed from the front. The number of the fourth outlets 321 is not particularly limited.

The fifth outlet air passage 411 functions as a freezing chamber outlet air passage through which cold air blown into the freezing chamber 41 flows. Further, the fifth outlet air passage 411 is formed so as to overlap the fifth return air passage 412 in the front-rear direction. When the refrigerator 1 is viewed from the side, the fifth outlet air passage 411 is located on the front side, and the fifth return air passage 412 is located on the back surface portion 50F side. As shown in FIG. 5, the fifth blowout air passage 411 is branched into two on the back surface 50F side of the vegetable compartment 31 when the refrigerator 1 is viewed from the front. One of the branched fifth outlet air passages 411 is referred to as the left side fifth outlet air passage 411A, and the other branched fifth outlet air passage 411 is referred to as the right side fifth outlet air passage 411B.
The fifth outlet air passage 411 corresponds to the first air passage of the present invention.

A fifth outlet 421A is formed in the fifth outlet air passage 411A on the left side. The cold air flowing through the left fifth outlet air passage 411A is introduced into the freezing chamber 41 via the fifth outlet 421A. The fifth outlet 421A is located on the upper left side of the freezing chamber 41 when the refrigerator 1 is viewed from the front. The number of the fifth outlets 421A is not particularly limited.

A fifth outlet 421B is formed in the fifth outlet air passage 411B on the right side. The cold air flowing through the fifth outlet air passage 411B on the right side is introduced into the freezing chamber 41 via the fifth outlet 421B. The fifth outlet 421B is located on the upper right side of the freezing chamber 41 when the refrigerator 1 is viewed from the front. The number of the fifth outlets 421B is not particularly limited.

The sixth outlet air passage 211b functions as a chilled chamber outlet air passage through which cold air blown into a chilled chamber (not shown) flows. A sixth damper 201b, which is one of the air volume adjusting devices, is provided at the cold air inlet of the sixth blowing air passage 211b. The sixth damper 201b is located in the middle of the ice making chamber 21 when the refrigerator 1 is viewed from the front. The operation of the sixth damper 201b is controlled by the control device as described above. As a result, the amount of cold air blown into the chilled chamber is adjusted.

Further, a sixth outlet 221b is formed in the sixth outlet air passage 211b. The cold air flowing through the sixth outlet air passage 211b is introduced into the chilled chamber via the sixth outlet 221b. The sixth outlet 221b is located in the lower central portion of the refrigerator compartment 11 when the refrigerator 1 is viewed from the front. If the chilled chamber is not installed, it is not necessary to provide the sixth outlet air passage 211b and the sixth damper 201b. Further, the number of the sixth outlet 221b is not particularly limited.

The first return air passage 141 functions as a refrigerating chamber return air passage through which the air used for cooling in the refrigerating chamber 11 flows. A first return port 131 is formed in the first return air passage 141. The first return port 131 is located on the lower right side of the refrigerator compartment 11 when the refrigerator 1 is viewed from the front. Further, the first return air passage 141 is joined to the vegetable compartment 31 via the air outlet 151. Therefore, the air flowing through the first return air passage 141 is introduced into the vegetable compartment 31 via the first return port 131 and the air outlet 151. The cold air introduced into the vegetable compartment 31 is used for cooling the vegetable compartment 31 and then returned to the cooler 600 via the fourth return air passage 312.

The second return air passage 241a functions as a cooling chamber return air passage through which the air used for cooling in the ice making chamber 21 flows. A second return port 231a is formed in the second return air passage 241a. The second return port 231a is located on the lower left side of the ice making chamber 21 when the refrigerator 1 is viewed from the front. Further, the second return air passage 241a is joined to the cooler chamber 27 via the second joint portion 251a. Therefore, the air flowing through the second return air passage 241a is returned to the cooler 600 via the second return port 231a and the second joint portion 251a.

The third return air passage 242 functions as a temperature switching chamber return air passage through which the air used for cooling in the temperature switching chamber 22 flows. A third return port 232 is formed in the third return air passage 242. The third return port 232 is located on the lower right side of the temperature switching chamber 22 when the refrigerator 1 is viewed from the front. Further, the third return air passage 242 is joined to the cooler chamber 27 via the third joint portion 252. Therefore, the air flowing through the third return air passage 242 is returned to the cooler 600 via the third return port 232 and the third joint portion 252.

The fourth return air passage 312 functions as a vegetable chamber return air passage through which the air used for cooling in the vegetable chamber 31 flows. A fourth return port 331 is formed in the fourth return air passage 312. The fourth return port 331 is located in the lower central portion of the vegetable compartment 31 when the refrigerator 1 is viewed from the front. Further, the fourth return air passage 312 is joined to the cooler chamber 27 via the fourth joint portion 351. Therefore, the air flowing through the fourth return air passage 312 is returned to the cooler 600 via the fourth return port 331 and the fourth joint portion 351.
The fourth return air passage 312 corresponds to the third air passage of the present invention.
The fourth return port 331 corresponds to the return port of the present invention.

The fifth return air passage 412 functions as a freezing chamber return air passage through which the air used for cooling in the freezing chamber 41 flows. The fifth return air passage 412 is configured to correspond to the number of branches of the fifth blow air passage 411. Further, the fifth return air passage 412 is formed so as to overlap the fifth blow air passage 411 in the front-rear direction. One of the branched fifth return air passages 412 is referred to as a left side fifth return air passage 412A, and the other branched fifth return air passage 412 is referred to as a right side fifth return air passage 412B.
The fifth return air passage 412 corresponds to the second air passage of the present invention.

A fifth return port 431A is formed in the fifth return air passage 412A on the left side. The fifth return port 431A is located on the upper left side of the freezing chamber 41 when the refrigerator 1 is viewed from the front. Further, the left fifth return air passage 412A is joined to the cooler chamber 27 via the fifth joint portion 451A. Therefore, the air flowing through the left fifth return air passage 412A is returned to the cooler 600 via the fifth return port 431A and the fifth joint portion 451A.

A fifth return port 431B is formed in the fifth return air passage 412B on the right side. The fifth return port 431B is located on the upper right side of the freezing chamber 41 when the refrigerator 1 is viewed from the front. Further, the right fifth return air passage 412B is joined to the cooler chamber 27 via the fifth joint portion 451B. Therefore, the air flowing through the fifth return air passage 412B on the right side is returned to the cooler 600 via the fifth return port 431B and the fifth joint portion 451B.

The flow of air around the cooler 600 will be described with reference to FIGS. 5 and 7.
The circulation of air in the refrigerator compartment 11 will be described.
The air volume of the cold air generated by the cooler 600 is adjusted by the first damper 101, flows through the first outlet air passage 111 from the lower side of the paper surface toward the upper side of the paper surface, and enters the refrigerating chamber 11 via the first outlet 121. be introduced. The cold air used in the refrigerating chamber 11 flows through the first return air passage 141 from the upper side of the paper surface to the lower side of the paper surface through the first return port 131, and is introduced into the vegetable chamber 31 through the air outlet 151.

The air circulation of the ice making chamber 21 will be described.
The air volume of the cold air generated by the cooler 600 is adjusted by the second damper 201a, flows through the second outlet air passage 211a, and is introduced into the ice making chamber 21 via the second outlet 221a. The cold air used in the ice making chamber 21 flows through the second return air passage 241a from the upper side of the paper surface to the lower side of the paper surface through the second return port 231a, and is returned to the cooler 600 via the second joint portion 251a. ..

The circulation of air in the temperature switching chamber 22 will be described.
The air volume of the cold air generated by the cooler 600 is adjusted by the third damper 202, flows through the third outlet air passage 212, and is introduced into the temperature switching chamber 22 via the third outlet 222. The cold air used in the temperature switching chamber 22 flows through the third return air passage 242 from the upper side of the paper surface to the lower side of the paper surface through the third return port 232, and is returned to the cooler 600 via the third joint portion 252. Is done.

The air circulation of the vegetable compartment 31 will be described.
The air volume of the cold air generated by the cooler 600 is adjusted by the fourth damper 301, flows through the fourth outlet air passage 311 and is introduced into the vegetable compartment 31 via the fourth outlet 321. The cold air used in the vegetable compartment 31 flows through the fourth return air passage 312 from the lower side of the paper surface to the upper side of the paper surface through the fourth return port 331, and is returned to the cooler 600 via the fourth joint portion 351. ..
The cold air introduced into the vegetable compartment 31 via the refrigerator compartment 11 is also returned to the cooler 600 via the fourth return port 331 and the fourth joint portion 351.

The fourth return port 331 does not overlap the front projection surface of the single rectangular plate-shaped vacuum heat insulating material 500A1 and is located on the lower outside of the front projection surface. The cold air blown out from the fourth outlet 321 is discharged from the fourth return port 331 located in the lower central portion of the vegetable compartment 31, is guided to the cooler 600, passes through the cooler 600 again, and is cooled. It circulates like this.

The air circulation of the freezing chamber 41 will be described.
The cold air generated by the cooler 600 flows through the fifth outlet air passage 411 and is branched into the fifth outlet air passage 411A on the left side and the fifth outlet air passage 411B on the right side. The cold air branched into the left fifth outlet air passage 411A is introduced into the freezing chamber 41 via the fifth outlet 421A. The cold air branched into the fifth outlet air passage 411B on the right side is introduced into the freezing chamber 41 via the fifth outlet 421B. The cold air used in the freezing chamber 41 flows from the lower side of the paper surface to the upper side of the paper surface through the fifth return air passage 412A on the left side and the fifth return air passage 412B on the right side through the fifth return port 431A and the fifth return port 431B. , It is returned to the cooler 600 via the fifth joint portion 451A and the fifth joint portion 451B.

Next, the vacuum heat insulating material 500A will be described.
As shown in FIG. 2, the refrigerator 1 is laid out in the order of the refrigerating chamber 11, the ice making chamber 21, the temperature switching chamber 22, the vegetable compartment 31, and the freezing chamber 41 from the top. That is, in the refrigerator 1, the storage chambers in the refrigerating temperature zone and the storage chambers in the freezing temperature zone are alternately arranged from the top.

The bottom surface of the refrigerating chamber 11, in other words, the top surface of the ice making chamber 21 and the temperature switching chamber 22, is a partition 51 which is one of the wall portions 55. The upper surface of the vegetable compartment 31, in other words, the bottom surface of the ice making chamber 21 and the temperature switching chamber 22, is a partition 53 which is one of the wall portions 55. The bottom surface of the vegetable compartment 31 and the top surface of the freezing chamber 41 are partitions 54, which are one of the wall portions 55. A vacuum heat insulating material 500A is provided inside each partition to suppress heat transfer.

The vacuum heat insulating material 500A arranged around the vegetable compartment 31 will be described with reference to FIG. As described above, in the refrigerator 1, the vacuum heat insulating material 500A is arranged so as to surround the front, back, top and bottom of the vegetable compartment 31. The vacuum heat insulating material 500A arranged on the front side of the cooler 600, that is, the back side of the vegetable chamber 31, is referred to as the vacuum heat insulating material 500A1. The vacuum heat insulating material 500A arranged on the upper surface side of the vegetable chamber 31 is referred to as the vacuum heat insulating material 500A2. The vacuum heat insulating material 500A arranged on the front side of the vegetable chamber 31 is referred to as the vacuum heat insulating material 500A3. The vacuum heat insulating material 500A arranged on the bottom surface side of the vegetable chamber 31 is referred to as the vacuum heat insulating material 500A4.

The vacuum heat insulating material 500A1 is arranged so as to extend in the longitudinal direction in the vertical direction when viewed from the side, and suppresses heat transfer between the vegetable chamber 31 and the back surface portion 50F side of the box body 50. Further, the vacuum heat insulating material 500A1 is configured to have a width larger than the width of the cooler 600.

The vacuum heat insulating material 500A2 is provided inside the partition 53 and suppresses heat transfer between the vegetable chamber 31, the ice making chamber 21, and the temperature switching chamber 22. The rear end of the vacuum heat insulating material 500A2 is located behind the rear end of the upper open end of the second vegetable compartment storage case 420B housed in the vegetable compartment 31. By doing so, it is suppressed that the temperature of the first vegetable compartment storage case 420A becomes low due to the heat absorption from the freezing chamber 41.

However, although the vacuum heat insulating material 500A2 is provided, it is difficult to cover the entire width and depth of the vegetable chamber 31 with the vacuum heat insulating material 500A2. Therefore, the amount of heat absorbed from the storage chamber in the freezing temperature zone increases in the vicinity of the front-rear end portion and the left-right end portion of the vegetable compartment 31. Further, the vacuum heat insulating material 500A2 is a resin bag on which a metal such as aluminum is vapor-deposited, or a resin bag on which a metal foil is laminated, and has a structure in which a core material made of glass fiber or the like is wrapped. The vacuum heat insulating material 500A is generally installed by folding the ear, which is the end of the bag, after vacuum packaging. Therefore, the vacuum heat insulating material 500A2 causes heat transport of the metal layer, that is, a heat bridge, and due to this influence, the heat insulating effect around the front and rear ends and the left and right ends of the vacuum heat insulating material 500A2 becomes the heat insulating effect of the central part. It tends to be inferior in comparison.

Further, when the air passage component is provided on the back surface 50F side of the box body 50, the partition 53 incorporating the vacuum heat insulating material 500A2 should be assembled after the air passage component is attached to the box body 50. It will be easier. However, in this case, the air passage component and the partition 53 must be joined, and the partition 53 and the left and right side walls of the box body 50 must be joined, and there is a possibility that cold air leakage cannot be completely blocked.
Therefore, it is assumed that the front, rear, left and right ends of the partition 53 become cold, and the water vaporized from the vegetables stored in the vegetable chamber 31 may locally condense, or may frost or freeze depending on the degree. ..

Therefore, the refrigerator 1 is provided with the lid structure 430, so that the water evaporated from the vegetables stored in the first vegetable compartment storage case 420A and the second vegetable compartment storage case 420B can be trapped as much as possible. Further, in the refrigerator 1, by providing the lid structure 430, it is possible not only to trap water but also to keep the inside of the first vegetable compartment storage case 420A and the second vegetable compartment storage case 420B at high humidity. Therefore, according to the refrigerator 1, the evaporation from the vegetables stored in the first vegetable compartment storage case 420A and the second vegetable compartment storage case 420B can be further suppressed, which is disadvantageous to the user such as dew condensation or frost on the partition 53 or the like. It is possible to suppress the occurrence of various phenomena.
The air passage components include equipment for forming the outlet air passage 110 and the return air passage 140, and an air volume adjusting device.

The vacuum heat insulating material 500A3 is provided inside the door portion 31A of the vegetable compartment 31 and suppresses heat transfer between the vegetable compartment 31 and the outside of the refrigerator 1.
The vacuum heat insulating material 500A4 is provided inside the partition 53 and suppresses heat transfer between the vegetable chamber 31 and the freezing chamber 41. The rear end of the vacuum heat insulating material 500A4 is located behind the rear end of the bottom surface of the first vegetable compartment storage case 420A housed in the vegetable compartment 31 by a length D2 minutes. By doing so, it is possible to prevent the temperature of the first vegetable compartment storage case 420A from becoming low due to the heat absorption from the ice making chamber 21 and the temperature switching chamber 22.

As described above, in the refrigerator 1, the vacuum heat insulating material 500A2 is installed in the partition 53, and the vacuum heat insulating material 500A4 is installed in the partition 54. By doing so, the inside of the first vegetable compartment storage case 420A and the second vegetable compartment storage case 420B of the vegetable compartment 31 becomes cold due to the heat absorption from the storage chambers in the freezing temperature zone located above and below the vegetable compartment 31. Is suppressed.

Next, the relationship between the vacuum heat insulating material 500A1 and a part of the air circulation path 80 will be described.
The vacuum heat insulating material 500A1 is installed on the front side of the cooler 600. Further, the vacuum heat insulating material 500A1 is configured to have a width larger than the width of the cooler 600. Therefore, in the refrigerator 1, a high heat insulating effect can be obtained.

Then, as shown in FIG. 5, the first return air passage 141 is formed on the right side surface of the cooler 600 deviated from the width direction of the vacuum heat insulating material 500A. The lower surface of the cooler 600 constitutes a wall portion with the vegetable compartment 31, and a part thereof functions as a fourth return air passage 312.

That is, in the refrigerator 1, since the first return air passage 141 is formed outside the width of the vacuum heat insulating material 500A1, the vacuum heat insulating material 500A1 having a rectangular plate shape can be used. If such the vacuum heat insulating material 500A1 is used, it is not necessary to chamfer and drill the corners of the vacuum heat insulating material 500A1, or it is not necessary to configure a large number of vacuum heat insulating materials 500A1. Therefore, according to the refrigerator 1, it is possible to suppress an increase in processing and manufacturing costs. Therefore, the refrigerator 1 is easy to assemble and has good manufacturing efficiency.

As described above, the vacuum heat insulating material 500A1 is vertically arranged, and the cooler 600 is installed on the back side of the vacuum heat insulating material 500A1. Further, in the refrigerator 1, the fifth outlet air passage 411 and the fifth return air passage 412 are branched, and the fourth return port 331 is formed between the branches. That is, the fourth return port 331 has the left side fifth outlet air passage 411A and the left side fifth return air passage 412A, the right side fifth outlet air passage 411B, and the right side fifth return air passage 412B when the refrigerator 1 is viewed from the front. It is located between and. Therefore, according to the refrigerator 1, the space on the back surface 50F side of the vegetable compartment 31 is effectively utilized.

In a general refrigerator, if the vacuum heat insulating material on the back surface 50F side of the vegetable compartment is vertically arranged, the position of the lower end and the position of the upper end coincide with each other in the depth direction of the box body. Therefore, neither the upper or lower space on the back surface 50F side of the vegetable compartment can be expanded, and an air passage must be formed in that space, and only a complicated air passage configuration can be adopted.
On the other hand, in the refrigerator 1, the vacuum heat insulating material 500A1 is vertically arranged, the fifth outlet air passage 411 and the fifth return air passage 412 are branched, and the fourth return port 331 is formed between the branches. The space on the back surface 50F side of the vegetable compartment 31 can be expanded without complicating the air passage configuration.

The fourth return air passage 312 and the fifth return air passage 412 can be formed so that air flows in from the lower end of the cooler 600, air can flow into the front front edge of the cooler 600, and the heat exchange efficiency of the cooler 600 Can be increased.

<Effects of Refrigerator 1>
As described above, the refrigerator 1 is provided with the fifth outlet air passage 411 and the fifth return air passage 412 behind the vacuum heat insulating material 500A1, and the fifth outlet air passage 411 and the fifth return air passage 412 are provided. , It is formed so as to overlap the front and back, and is bifurcated in the width direction of the vacuum heat insulating material 500A1.
Therefore, according to the refrigerator 1, the air passage configuration can be simplified without complicating the air passage configuration.

In the refrigerator 1, when the fourth return port 331 is viewed from the front, the left fifth outlet air passage 411A, the left fifth return air passage 412A, and the right fifth return air passage 412A, which are branched at the back portion 50F of the vegetable compartment 31, are branched. It is formed between the blowout air passage 411B and the fifth return air passage 412B on the right side.
Therefore, according to the refrigerator 1, the space on the back surface 50F side of the vegetable compartment 31 can be effectively utilized without complicating the air passage configuration.

In the refrigerator 1, the vacuum heat insulating material 500A1 has a width larger than the width of the cooler 600, so that a high heat insulating effect can be obtained.

Since the refrigerator 1 is laid out in the order of the ice making room 21, the vegetable room 31, and the freezing room 41 from the top, it is possible to improve the convenience of the user while maintaining the heat insulating effect.

Embodiment 2.
FIG. 8 is an enlarged cross-sectional view of a part of the refrigerator 1A according to the second embodiment of the present invention. The refrigerator 1A according to the second embodiment of the present invention will be described with reference to FIG. FIG. 8 corresponds to FIG. 6 shown in the first embodiment. In FIG. 8, the air flow is indicated by an arrow.
In the second embodiment, the differences from the first embodiment will be mainly described, and the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the second embodiment, the configuration of the fifth blown air passage 411 is different from that of the fifth blown air passage 411 described in the first embodiment. In order to conveniently distinguish it from the fifth blown air passage 411 of the first embodiment, it will be described as the fifth blown air passage 411C in the second embodiment. The other configurations of the second embodiment are as described in the first embodiment. However, as shown in FIG. 8, the freezing chamber 41 houses the first freezing chamber storage case 440A and the second freezing chamber storage case 440B.

The second freezer storage case 440B is arranged above the first freezer storage case 440A, and has a volume smaller than that of the first freezer storage case 440A. When the second freezing room storage case 440B is housed in the first freezing room storage case 440A and the door portion 31A is closed, the upper open end behind the second freezing room storage case 440B is the first freezing room storage case. It is located in front of the upper open end behind the 440A. The number of storage cases to be stored in the freezing chamber 41 is not particularly limited, but at least the first freezing chamber storage case 440A and the second freezing chamber storage case 440B may be stored.

The fifth outlet air passage 411C functions as a freezing chamber outlet air passage through which cold air blown into the freezing chamber 41 flows, similarly to the fifth outlet air passage 411 described in the first embodiment. The fifth outlet air passage 411 is branched into a fifth outlet air passage 411A on the left side and a fifth outlet air passage 411B on the right side. Then, in the refrigerator 1A, the left fifth outlet air passage 411A and the right side fifth outlet air passage 411B are further branched. Here, it is assumed that the fifth blowout air passage 411C is the left side fifth blowout air passage 411A.

As shown in FIG. 8, the fifth blowout air passage 411C is branched in the freezing chamber 41. One of the branched fifth outlet air passages 411C is referred to as a lower fifth outlet air passage 411C-1, and the other branched fifth outlet air passage 411C is referred to as an upper fifth outlet air passage 411C-2.

The lower fifth outlet air passage 411C-1 functions as a freezing chamber outlet air passage through which cold air blown into the first freezing chamber storage case 440A of the freezing chamber 41 flows. An outlet (not shown) is formed in the lower fifth outlet air passage 411C-1. The cold air flowing through the lower fifth outlet air passage 411C-1 is introduced into the first freezing chamber storage case 440A of the freezing chamber 41 via the outlet. The outlet of the lower fifth outlet air passage 411C-1 may be formed at a position lower than the outlet of the upper fifth outlet air passage 411C-2 when the refrigerator 1A is viewed from the front. The number of outlets of the lower fifth outlet air passage 411C-1 is not particularly limited.

The upper fifth outlet air passage 411C-2 functions as a freezing chamber outlet air passage through which cold air blown into the second freezing chamber storage case 440B of the freezing chamber 41 flows. An outlet (not shown) is formed in the upper fifth outlet air passage 411C-2. The cold air flowing through the upper fifth outlet air passage 411C-2 is introduced into the second freezer storage case 440B of the freezer 41 via the outlet. The outlet of the upper fifth outlet air passage 411C-2 may be formed at a position above the outlet of the lower fifth outlet air passage 411C-1 when the refrigerator 1A is viewed from the front. The number of outlets of the upper fifth outlet air passage 411C-2 is not particularly limited.

The air circulation of the freezing chamber 41 will be described.
The cold air generated by the cooler 600 flows through the fifth outlet air passage 411C and is branched into the lower fifth outlet air passage 411C-1 and the upper fifth outlet air passage 411C-2.
The cold air flowing through the lower fifth outlet air passage 411C-1 is introduced into the freezing chamber 41 through the outlet formed in the lower fifth outlet air passage 411C-1. The cold air introduced into the freezing chamber 41 is guided to the first freezing chamber storage case 440A and cools the food or the like stored in the first freezing chamber storage case 440A. The cold air used in the freezing chamber 41 flows through the fifth return air passage 412 from the lower side of the paper surface toward the upper side of the paper surface through the fifth return port 431A and is returned to the cooler 600.

The cold air flowing through the upper fifth outlet air passage 411C-2 is introduced into the freezing chamber 41 through the outlet formed in the upper fifth outlet air passage 411C-2. The cold air introduced into the freezing chamber 41 is guided to the second freezing chamber storage case 440B and cools the food or the like stored in the second freezing chamber storage case 440B. The cold air used in the freezing chamber 41 merges with the cold air used for cooling in the first freezing chamber storage case 440A, and the fifth return air passage 412 is displayed on paper as shown in FIG. 8 through the fifth return port 431A. It flows from the lower side toward the upper side of the paper surface and is returned to the cooler 600.

<Effect of refrigerator 1A>
As described above, in the refrigerator 1A, the fifth outlet air passage 411 is bifurcated in the width direction of the vacuum heat insulating material 500A1 and then further bifurcated vertically, so that the freezing chamber 41 can be effectively cooled. It can be introduced, and the cooling effect of the freezing chamber 41 can be improved.

Embodiment 3.
FIG. 9 is a schematic view for explaining the air circulation path 80 of the refrigerator 1B according to the third embodiment of the present invention. FIG. 10 is a cross-sectional view schematically showing a YY cross section of FIG. FIG. 11 is an explanatory diagram schematically showing the air flow of the refrigerator 1B. Refrigerator 1B will be described with reference to FIGS. 9 to 11. In addition, in FIGS. 9 to 11, the flow of air is indicated by an arrow. Note that FIG. 9 shows an example in which a chilled room is installed in the refrigerating room 11.
In the third embodiment, the differences between the first embodiment and the second embodiment will be mainly described, and the same parts as those in the first embodiment and the second embodiment are designated by the same reference numerals and the description thereof will be omitted. It shall be.

The lower end of the cooler 600 arranged in the cooler room 27 is located in the cooler room 27 below the floor surface 31B of the vegetable room 31.
By locating the lower end of the cooler 600 below the floor surface 31B of the vegetable compartment 31, it is possible to secure a larger space above the cooler 600. As a result, the degree of freedom in the size of the blower 800 installed in a part of the cooler chamber 27 is increased. Further, above the blower 800, an air volume adjusting device for the air passage toward each storage chamber, which is held by the foamed heat insulating material, is installed.

Further, as shown in FIG. 11, a drip heater 750 is installed on the drip tray 751. Below the cooler chamber 27, a drip tray 751 that receives the molten water at the time of defrosting is provided. The drip heater 750 is provided to avoid refreezing of the molten water received by the drip tray 751, and is energized as necessary to generate heat. The drip heater 750 is not indispensable, and the heater 700 may also be used.

Next, the vegetable compartment 31 and the periphery of the vegetable compartment 31 will be described.
When the second vegetable compartment storage case 420B is housed in the first vegetable compartment storage case 420A and the door portion 31A is closed, the upper open end behind the second vegetable compartment storage case 420B is the first vegetable compartment storage case. It is located 3 minutes behind the upper open end behind 420A.

Next, the air passage configuration of the refrigerator 1B will be specifically described.
Similar to the refrigerator 1 according to the first embodiment, the refrigerator 1B has an outlet air passage 110 and a return air passage 140.
A fifth outlet 421 is formed in the fifth outlet 411. The cold air flowing through the fifth outlet air passage 411 is introduced into the freezing chamber 41 via the fifth outlet 421. The fifth outlet 421 is located at the center of the upper part of the freezing chamber 41 when the refrigerator 1B is viewed from the front. The number of the fifth outlets 421 is not particularly limited.
The first return air passage 141 is joined to the cooler chamber 27 via the first joint portion 551. Therefore, the air flowing through the first return air passage 141 is returned to the cooler 600 via the first return port 131 and the first joint portion 551.

The third return port 232 is located in the lower central portion of the temperature switching chamber 22 when the refrigerator 1B is viewed from the front.
The fourth return port 331 is located on the lower left side of the vegetable compartment 31 when the refrigerator 1B is viewed from the front. Therefore, the air flowing through the fourth return air passage 312 is returned to the cooler 600 from the lower left of the cooler 600 via the fourth return port 331 and the fourth joint portion 351.

A fifth return port 431 is formed in the fifth return air passage 412. The fifth return port 431 is located at the center of the upper part of the freezing chamber 41 when the refrigerator 1B is viewed from the front. Further, the fifth return air passage 412 is joined to the cooler chamber 27 via the fifth joint portion 451. Therefore, the air flowing through the fifth return air passage 412 is returned to the cooler 600 from the lower right of the cooler 600 via the fifth return port 431 and the fifth joint portion 451.

The flow of air around the cooler 600 will be described with reference to FIGS. 9 and 11.
The circulation of air in the refrigerator compartment 11 will be described.
The air volume of the cold air generated by the cooler 600 is adjusted by the first damper 101, flows through the first outlet air passage 111 from the lower side of the paper surface toward the upper side of the paper surface, and enters the refrigerating chamber 11 via the first outlet 121. be introduced. The cold air used in the refrigerating chamber 11 flows through the first return port 131 from the upper side of the paper surface to the lower side of the paper surface through the first return air passage 141 as shown by arrows A1 in FIGS. 9 and 11, and the first It is returned to the cooler 600 via the joint 551.

The air circulation of the ice making chamber 21 will be described.
The air volume of the cold air generated by the cooler 600 is adjusted by the second damper 201a, flows through the second outlet air passage 211a, and is introduced into the ice making chamber 21 via the second outlet 221a. The cold air used in the ice making chamber 21 flows through the second return port 231a through the second return air passage 241a from the upper side of the paper surface to the lower side of the paper surface as shown by the arrows A2 in FIGS. 9 and 11. It is returned to the cooler 600 via the joint 251a.

The circulation of air in the temperature switching chamber 22 will be described.
The air volume of the cold air generated by the cooler 600 is adjusted by the third damper 202, flows through the third outlet air passage 212, and is introduced into the temperature switching chamber 22 via the third outlet 222. The cold air used in the temperature switching chamber 22 flows through the third return port 232 from the upper side of the paper surface to the lower side of the paper surface through the third return air passage 242 as shown by arrows A3 in FIGS. 9 and 11. It is returned to the cooler 600 via the three joints 252.

The air circulation of the vegetable compartment 31 will be described.
The air volume of the cold air generated by the cooler 600 is adjusted by the fourth damper 301, flows through the fourth outlet air passage 311 and is introduced into the vegetable compartment 31 via the fourth outlet 321. The cold air used in the vegetable compartment 31 flows through the fourth return port 331 from the left side of the paper to the right side of the paper through the fourth return air passage 312 as shown by the arrows A4 in FIGS. 9 and 11, and the fourth joint It is returned to the cooler 600 via the section 351.

The fourth return port 331 from the vegetable compartment 31 is formed on the lower left side diagonally with respect to the fourth outlet 321 on the back surface 50F side of the vegetable compartment 31. The fourth return port 331 does not overlap the front projection surface of the single rectangular plate-shaped vacuum heat insulating material 500A1 and is located outside the front projection surface. The cold air blown out from the fourth outlet 321 is discharged from the fourth return port 331 located at the diagonal corner of the inner wall of the vegetable compartment 31 with respect to the fourth outlet 321 and is guided to the cooler 600. , It circulates through the cooler 600 again to be cooled.

The air circulation of the freezing chamber 41 will be described.
The cold air generated by the cooler 600 flows through the fifth outlet air passage 411 and is introduced into the freezing chamber 41 via the fifth outlet 421. The cold air used in the freezing chamber 41 flows through the fifth return port 431 through the fifth return air passage 412 from the lower side of the paper surface to the upper side of the paper surface as shown by arrows A5 in FIGS. 9 and 11, and the fifth It is returned to the cooler 600 via the joint 451.

Next, the vacuum heat insulating material 500A will be described.
Similar to the refrigerator 1 according to the first embodiment, the refrigerator 1B is laid out in the order of the refrigerating room 11, the ice making room 21, the temperature switching room 22, the vegetable room 31, and the freezing room 41 from the top. That is, in the refrigerator 1B, the storage chambers in the refrigerating temperature zone and the storage chambers in the freezing temperature zone are alternately arranged from the top.

The vacuum heat insulating material 500A1 is inclined so that the upper end is located on the back surface 50F side of the box body 50, that is, the rear side, and the lower end is located on the front surface portion 50A side, that is, the front portion of the box body 50 when viewed from the side. , The heat transfer between the vegetable compartment 31 and the back surface 50F side of the box 50 is suppressed. Further, the vacuum heat insulating material 500A1 is configured to have a width larger than the width of the cooler 600. The inclination angle θ of the vacuum heat insulating material 500A1 is not particularly limited, but it may be adjusted in the range of 0 degree <inclination angle θ <15 degrees. The inclination angle θ is an angle formed by the center line L1 and the vertical line L2 of the vacuum heat insulating material 500A.

The vacuum heat insulating material 500A2 is provided inside the partition 53 and suppresses heat transfer between the vegetable chamber 31, the ice making chamber 21, and the temperature switching chamber 22. The rear end of the vacuum heat insulating material 500A2 is located one minute behind the rear end of the upper open end of the second vegetable compartment storage case 420B housed in the vegetable compartment 31. By doing so, it is suppressed that the temperature of the second vegetable compartment storage case 420B becomes low due to the heat absorption from the ice making chamber 21 and the temperature switching chamber 22.

The vacuum heat insulating material 500A3 is provided inside the door portion 31A of the vegetable compartment 31 and suppresses heat transfer between the vegetable compartment 31 and the outside of the refrigerator 1B.
The vacuum heat insulating material 500A4 is provided inside the partition 54 and suppresses heat transfer between the vegetable chamber 31 and the freezing chamber 41. The rear end of the vacuum heat insulating material 500A4 is located behind the rear end of the bottom surface of the first vegetable compartment storage case 420A housed in the vegetable compartment 31 by a length D2 minutes. By doing so, it is suppressed that the temperature of the first vegetable compartment storage case 420A becomes low due to the heat absorption from the freezing chamber 41.

As described above, in the refrigerator 1B, the vacuum heat insulating material 500A2 is installed in the partition 53, and the vacuum heat insulating material 500A4 is installed in the partition 54. By doing so, the inside of the first vegetable compartment storage case 420A and the second vegetable compartment storage case 420B of the vegetable compartment 31 becomes cold due to the heat absorption from the storage chambers in the freezing temperature zone located above and below the vegetable compartment 31. Is suppressed.

Next, the relationship between the vacuum heat insulating material 500A1 and a part of the air circulation path 80 will be described.
The vacuum heat insulating material 500A1 is installed on the front side of the cooler 600. Further, the vacuum heat insulating material 500A1 is fixed in an inclined arrangement so that the lower end is located on the front surface 50A side of the box body 50 and the upper end is located on the back surface 50F side of the box body 50. Further, the vacuum heat insulating material 500A1 is configured to have a width larger than the width of the cooler 600.

Then, as shown in FIG. 9, the first return air passage 141 is formed on the right side surface of the cooler 600 deviated from the width direction of the vacuum heat insulating material 500A. Further, the third return air passage 242 and the fourth return air passage 312 are formed in front of the first return air passage 141. The left side surface of the cooler 600 constitutes a wall portion with the vegetable compartment 31, and a part thereof functions as a fourth return air passage 312.

Further, a fifth blowout air passage 411 is formed on the back side of the vacuum heat insulating material 500A1 and within the width direction projection range of the vacuum heat insulating material 500A1 so as to be substantially parallel to the inclination of the vacuum heat insulating material 500A1. Further, a fifth return air passage 412 is formed on the back side of the fifth outlet air passage 411. The fifth outlet air passage 411 and the fifth return air passage 412 are configured to have the same width. The fifth outlet air passage 411 and the fifth return air passage 412 are arranged so as to overlap each other when the refrigerator 1B is viewed from the front. The fifth return air passage 412 is joined to the cooler chamber 27 so that air flows in from the lower end to the middle of the front surface of the cooler 600. It is not necessary that the width of the fifth outlet air passage 411 and the width of the fifth return air passage 412 are exactly the same width.

In the refrigerator 1B, by arranging the vacuum heat insulating material 500A1 in an inclined manner, the space above the vegetable compartment 31, that is, the volume of the vegetable compartment 31 can be expanded. That is, according to the refrigerator 1B, the depth of the upper part of the vegetable compartment 31 can be made deep.

A movable second vegetable compartment storage case 420B is stored in this portion. By arranging the vacuum heat insulating material 500A1 at an angle, the space above the vegetable room 31 can be expanded, but on the other hand, the first vegetable room storage case 420A needs to have a shape corresponding to the inclined arrangement of the vacuum heat insulating material 500A. is there. That is, although the storage capacity of the first vegetable compartment storage case 420A can be expanded, it may lead to a shape that impairs the convenience of the user. On the other hand, in the refrigerator 1B, by arranging the first vegetable compartment storage case 420A and the second vegetable compartment storage case 420B in an overlapping manner, the volume invalid for storage can be reduced and the arrangement according to the food size can be achieved. It can also be improved.

Further, by arranging the vacuum heat insulating material 500A1 in an inclined manner, the space on the back surface 50F side of the vegetable compartment 31 of the box body 50 can be expanded. Therefore, the fifth outlet air passage 411 and the fifth return air passage 412 located on the back surface 50F side of the vegetable compartment 31 can be linearly configured. Therefore, it is possible to reduce the bending of the fifth outlet air passage 411 and the fifth return air passage 412 to the freezing chamber 41, which requires the most cooling capacity, and the change in the air passage area, and it is possible to reduce the pressure loss. Further, the fifth return air passage 412 can be formed so that air flows from the lower end to the middle stage of the front surface of the cooler 600, and air can flow into the front edge of the front surface of the cooler 600, thereby increasing the heat exchange efficiency of the cooler 600. Will be possible.

<Effect of refrigerator 1B>
As described above, in the refrigerator 1B, the vacuum heat insulating material 500A1 is inclined so that the lower end is located on the front portion 50A side and the upper end is located on the back portion 50F side, so that the volume of the vegetable chamber 31 is increased. Can be expanded.

In the refrigerator 1B, the rear end of the vacuum heat insulating material 500A4 is located on the back side of the bottom surface of the first vegetable chamber storage case 420A, and the rear end of the vacuum heat insulating material 500A2 is the rear end of the second vegetable chamber storage case 420B. It is located on the back side of the upper rear end.
Therefore, according to the refrigerator 1B, it is possible to prevent the first vegetable compartment storage case 420A and the second vegetable compartment storage case 420B from becoming cold due to heat absorption from the ice making chamber 21, the temperature switching chamber 22, and the freezing chamber 41. ing.

In the refrigerator 1B, the fifth outlet air passage 411 and the fifth return air passage 412 are formed so as to overlap each other in the front-rear direction, and the fifth return air passage 412 is configured to return air from the lower end to the middle stage of the front surface of the cooler 600. Has been done.
Therefore, according to the refrigerator 1B, it is possible to increase the heat exchange efficiency of the cooler 600.

The refrigerator 1B has a fin portion 430A formed therein, and is provided with a lid structure 430 that covers the upper open surface of the second vegetable compartment storage case 420B.
Therefore, according to the refrigerator 1B, not only water can be trapped in the vegetable compartment 31, but also the insides of the first vegetable compartment storage case 420A and the second vegetable compartment storage case 420B can be kept at high humidity.

Since the refrigerator 1B is laid out in the order of the ice making room 21, the vegetable room 31, and the freezing room 41 from the top, it is possible to improve the convenience of the user while maintaining the heat insulating effect.

Embodiment 4.
FIG. 12 is an enlarged and schematic cross-sectional view of a part of the refrigerator 1C according to the fourth embodiment of the present invention. The refrigerator 1C according to the fourth embodiment of the present invention will be described with reference to FIG. FIG. 12 corresponds to FIG. 10 shown in the third embodiment. In FIG. 12, the air flow is indicated by an arrow.
In the fourth embodiment, the differences from the first to third embodiments will be mainly described, and the same parts as those in the first to third embodiments are designated by the same reference numerals and the description thereof will be omitted. It shall be.

In the fourth embodiment, the configuration of the fifth blown air passage 411 is different from that of the fifth blown air passage 411 described in the third embodiment. In order to conveniently distinguish it from the fifth blown air passage 411 of the third embodiment, it will be described as the fifth blown air passage 411a in the fourth embodiment. The other configurations of the fourth embodiment are as described in the first embodiment. However, as shown in FIG. 12, the freezing chamber 41 houses the first freezing chamber storage case 440A and the second freezing chamber storage case 440B.

The second freezer storage case 440B is arranged above the first freezer storage case 440A, and has a volume smaller than that of the first freezer storage case 440A. When the second freezing room storage case 440B is housed in the first freezing room storage case 440A and the door portion 31A is closed, the upper open end behind the second freezing room storage case 440B is the first freezing room storage case. It is located in front of the upper open end behind the 440A. The number of storage cases to be stored in the freezing room 41 is not particularly limited, but at least the first freezing room storage case 440A and the second freezing room storage case 440B may be stored.

The fifth outlet air passage 411a functions as a freezing chamber outlet air passage through which cold air blown into the freezing chamber 41 flows, similarly to the fifth outlet air passage 411 described in the first embodiment. The fifth outlet air passage 411a is branched in the freezing chamber 41. One of the branched fifth outlet air passages 411a is referred to as a lower fifth outlet air passage 411a-1, and the other branched fifth outlet air passage 411a is referred to as an upper fifth outlet air passage 411a-2.

The lower fifth outlet air passage 411a-1 functions as a freezing chamber outlet air passage through which cold air blown into the first freezing chamber storage case 440A of the freezing chamber 41 flows. An outlet (not shown) is formed in the lower fifth outlet air passage 411a-1. The cold air flowing through the lower fifth outlet air passage 411a-1 is introduced into the first freezing chamber storage case 440A of the freezing chamber 41 via the outlet. The outlet of the lower fifth outlet air passage 411a-1 may be formed at a position lower than the outlet of the upper fifth outlet air passage 411a-2 when the refrigerator 1C is viewed from the front. The number of outlets of the lower fifth outlet air passage 411a-1 is not particularly limited.

The upper fifth outlet air passage 411a-2 functions as a freezing chamber outlet air passage through which cold air blown into the second freezing chamber storage case 440B of the freezing chamber 41 flows. An outlet (not shown) is formed in the upper fifth outlet air passage 411a-2. The cold air flowing through the upper fifth outlet air passage 411a-2 is introduced into the second freezer storage case 440B of the freezer 41 via the outlet. The outlet of the upper fifth outlet air passage 411a-2 may be formed at a position above the outlet of the lower fifth outlet air passage 411a-1 when the refrigerator 1C is viewed from the front. The number of outlets of the upper fifth outlet air passage 411a-2 is not particularly limited.

The air circulation of the freezing chamber 41 will be described.
The cold air generated by the cooler 600 flows through the fifth outlet air passage 411 and is branched into the lower fifth outlet air passage 411a-1 and the upper fifth outlet air passage 411a-2.
The cold air flowing through the lower fifth outlet air passage 411a-1 is introduced into the freezing chamber 41 through the outlet formed in the lower fifth outlet air passage 411a-1. The cold air introduced into the freezing chamber 41 is guided to the first freezing chamber storage case 440A and cools the food or the like stored in the first freezing chamber storage case 440A. The cold air used in the freezing chamber 41 flows through the fifth return air passage 412 from the lower side of the paper surface toward the upper side of the paper surface through the return port (not shown) and is returned to the cooler 600.

The cold air flowing through the upper fifth outlet air passage 411a-2 is introduced into the freezing chamber 41 through the outlet formed in the upper fifth outlet air passage 411a-2. The cold air introduced into the freezing chamber 41 is guided to the second freezing chamber storage case 440B and cools the food or the like stored in the second freezing chamber storage case 440B. The cold air used in the freezing chamber 41 merges with the cold air used for cooling in the first freezing chamber storage case 440A, and the fifth return air passage 412 is shown on paper as shown in FIG. 8 through a return port (not shown). It flows from the lower side toward the upper side of the paper surface and is returned to the cooler 600.

<Effect of refrigerator 1C>
As described above, in the refrigerator 1C, the fifth outlet air passage 411 is bifurcated in the width direction of the vacuum heat insulating material 500A1 and then further bifurcated vertically, so that the freezing chamber 41 is effectively cooled. It can be introduced, and the cooling effect of the freezing chamber 41 can be improved.

Although the embodiments of the present invention have been described above by dividing them into four embodiments, it is possible to appropriately combine the embodiments.

1 Refrigerator, 1A Refrigerator, 1B Refrigerator, 1C Refrigerator, 11 Refrigerator, 11A Door, 21 Ice Making Room, 21A Door, 22 Temperature Switching Room, 22A Door, 27 Cooler Room, 31 Vegetable Room, 31A Door, 31B Floor, 41 Freezer, 41A Door, 50 Box, 50A Front, 50B Top, 50C Bottom, 50D Right Side, 50E Left Side, 50F Back, 51 Partition, 51A Partition, 51B Partition, 52 Partition, 53 partition, 53A partition, 53B partition, 54 partition, 55 wall, 56 sheet metal, 57 inner box, 70 refrigerant circuit, 71 compressor, 72 air-cooled condenser, 73 heat dissipation pipe, 74 dew-proof pipe, 75 dryer , 76 Decompressor, 80 Air circulation path, 101 1st damper, 110 outlet air passage, 111 1st outlet air passage, 121 1st outlet, 131 1st return port, 140 return air passage, 141 1st return air passage , 151 air outlet, 201a 2nd damper, 201b 6th damper, 202 3rd damper, 211a 2nd outlet air passage, 211b 6th outlet air passage, 212 3rd outlet air passage, 221a 2nd outlet, 221b 6th Outlet, 222 3rd outlet, 231a 2nd return port, 232 3rd return port, 241a 2nd return air passage, 242 3rd return air passage, 251a 2nd joint, 252 3rd joint, 301 4th Damper, 311 4th outlet air passage, 312 4th return air passage, 321 4th outlet, 331 4th return port, 351 4th junction, 411 5th outlet air passage, 411A Left side 5th outlet air passage, 411B Right 5th air passage, 411C 5th air passage, 411C-1 Lower 5th air passage, 411C-2 Upper 5th air passage, 411a 5th air passage, 411a-1 Lower 5th air passage 411a-2 Upper 5th outlet air passage, 412 5th return air passage, 412A Left 5th return air passage, 412B Right 5th return air passage, 420A 1st vegetable compartment storage case, 420B 2nd vegetable compartment storage case, 421 5th outlet, 421A 5th outlet, 421B 5th outlet, 430 lid structure, 430A fins, 431 5th return port, 431A 5th return port, 431B 5th return Mouth, 440A 1st freezer storage case, 440B 2nd freezer storage case, 451 5th joint, 451A 5th joint, 451B 5th joint, 500 heat insulating material, 500A vacuum heat insulating material, 500A1 vacuum heat insulating material, 500A2 vacuum heat insulating material, 500A3 vacuum heat insulating material, 500A4 vacuum heat insulating material, 551 first joint, 600 cooler, 700 heater, 750 drip heater, 751 drip tray, 800 blower.

Claims (4)

A first storage chamber in the freezing temperature zone having a front part and a back part, and
A second storage chamber in the freezing temperature zone having a front part and a back part, and
A third storage chamber in a refrigerating temperature zone, which has a front portion and a back portion and is arranged between the first storage chamber and the second storage chamber,
A cooler provided on the back side of the third storage chamber and
The vacuum heat insulating material provided on each wall portion including the front surface portion and the back surface portion and partitioning the third storage chamber, and
A first air passage formed behind the vacuum heat insulating material provided on the back surface of the third storage chamber and introducing air from the cooler into the second storage chamber, and
A second air passage formed behind the vacuum heat insulating material provided on the back surface of the third storage chamber and returning the air used in the second storage chamber to the cooler.
A third air passage for returning the air used in the third storage chamber to the cooler through the return port is provided.
The first air passage and the second air passage are
It is formed so as to overlap the front and back, and each is branched into two in the width direction of the vacuum heat insulating material.
The air flowing through the first air passage is
It is blown out from below the lower end of the vacuum heat insulating material.
The air flowing through the second air passage is
Introduced from below the lower end of the vacuum heat insulating material,
The return port is
Is formed below the vacuum heat insulating material,
A refrigerator formed between the first air passage and the second air passage branched on the back surface of the third storage chamber when viewed from the front . The vacuum heat insulating material provided on the back side of the third storage chamber is
The refrigerator according to claim 1, which has a width larger than the width of the cooler. The first air passage is
The refrigerator according to claim 1 or 2 , which is bifurcated in the width direction of the vacuum heat insulating material and then further bifurcated vertically. The first storage chamber is an ice making chamber.
The second storage chamber is a freezing chamber.
The third storage room is a vegetable room,
The refrigerator according to any one of claims 1 to 3 , which is laid out in the order of the ice making room, the vegetable room, and the freezing room from the top.

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