JP6689415B2 - refrigerator - Google Patents

Description

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

  In the conventional refrigerator, the refrigerator compartment, the ice making compartment, the freezer compartment, and the vegetable compartment are laid out in this order from the top. In this layout, the vegetable compartment is located at the lowest position in the refrigerator. Therefore, the user has to bend his knees and bend his or her waist in order to take out the vegetables from the vegetable room.

  Here, when comparing the number of times of opening and closing the door or the opening time of the door in the vegetable compartment and the freezing room, although there are individual differences, the number of times the door is opened and closed is larger in the vegetable compartment and the opening time of the door is also larger. long. Therefore, it is expected that the convenience of the refrigerator as a whole will be improved by replacing the positions of the vegetable compartment and the freezing compartment and arranging the vegetable compartment above the freezing compartment.

However, in the conventional refrigerator, firstly, in order to improve the thermal efficiency, a plurality of chambers in the freezing temperature zone are gathered in one place.
Secondly, the conventional refrigerator has a structure in which a cooler is arranged on the back surface of the freezer compartment and problems such as dew formation and frost formation are unlikely to occur even if no special heat insulating parts are provided between the freezer compartment and the cooler. It has become.

On the other hand, in order to improve the convenience for the user, it is conceivable that the refrigerator is laid out in the order of a refrigerator room, an ice making room, a vegetable room, and a freezer room from the top. In this refrigerator, chambers of a refrigerating temperature zone (plus temperature) and a freezing temperature zone (minus temperature) are alternately arranged from above.
Therefore, the refrigerator having such a layout is firstly inferior in thermal efficiency to the conventional refrigerator. In addition, the thickness of the wall of each room is increased in order to ensure the necessary heat insulation performance, and the space for storing food is reduced when compared with the case where the refrigerator has the same outer shape.
Further, in the refrigerator having such a layout, secondly, the cooler is arranged on the back surface of the vegetable compartment, and the wall portion separating the vegetable compartment and the cooler has higher heat insulation performance than the conventional one. There is a need. In order to improve the heat insulation performance, the wall thickness may be increased. However, as mentioned above, the food storage space is sacrificed.
Therefore, conventionally, as the heat insulating component, a molded product of styrofoam, which has good workability and is easy to attach and detach or easy to carry, has been used. However, by using a vacuum heat insulating material having higher heat insulating performance (smaller heat transfer coefficient) as the heat insulating component, both heat insulating performance and food storage space can be secured.

JP 2012-242072 A

When arranging the vacuum heat insulating material between the vegetable compartment and the cooler, an air passage is necessary for feeding the cold air cooled by the cooler into the vegetable compartment. Patent Document 1 describes that "the vacuum heat insulating material is provided on the front surface of the partition wall forming the inner wall surface other than the inlet and the outlet" (see claim 10 of Patent Document 1). In this way, there is a method in which all parts except the inlet and the outlet are covered with the vacuum heat insulating material.
However, in that case, it is 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.

  The present invention is intended to solve the above problems, and an object of the present invention is to provide a refrigerator that can be manufactured at low cost, is easy to assemble, and has good manufacturing efficiency.

The refrigerator according to the present invention includes a storage chamber that is set to a temperature higher than that of other surrounding chambers to store the stored items, and the storage chamber has a vacuum heat insulating material arranged on each wall portion that partitions the storage chamber. A cold air outlet and a cold air return opening are formed on the inner wall of the back wall of the storage compartment, and the vacuum heat insulating material disposed on the back wall of the storage compartment includes the cold air outlet and the cold air outlet. The cold air outlet and the cold air return port do not overlap the rear projection surface of the cold air return port and are located at diagonal corners of the storage chamber inner wall .

  According to the refrigerator of the present invention, in the storage compartment, the vacuum heat insulating material is arranged on each of the wall portions that partition the storage compartment. Therefore, the area covered by the vacuum heat insulating material in the storage chamber is increased as much as possible. Further, since the vacuum heat insulating material has a shape such as a rectangle that is easy to manufacture, the vacuum heat insulating material does not need to be provided with a notch or a hole, and the necessary heat insulating performance can be secured with a simple configuration. Therefore, the manufacturing cost can be reduced, the assembly is simple, and the manufacturing efficiency is good.

It is an external appearance perspective view which shows the refrigerator which concerns on Embodiment 1 of this invention. It is a figure which shows the refrigerant circuit of the refrigerator which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the vertical cross section of the left-right direction of the refrigerator which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the one part cross section of the wall part of the box of the refrigerator which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows a part of cross section of the wall part of the left side surface part among the box bodies of the refrigerator which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the other example of a part of cross section of the wall part of the box of the refrigerator which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the other example of a part of cross section of the wall part of the box of the refrigerator which concerns on Embodiment 1 of this invention. It is a figure which shows the front-back longitudinal cross-section of the lower part periphery of the refrigerator which concerns on Embodiment 1 of this invention. It is a figure which shows the left-right vertical cross section of the lower part periphery of the refrigerator which concerns on Embodiment 1 of this invention. It is a figure showing a right-and-left longitudinal section around a vegetable compartment of a refrigerator concerning Embodiment 1 of the present invention. It is explanatory drawing which shows the vertical cross section of another example of the ceiling wall part in the vegetable compartment of the refrigerator which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the vertical cross section of another example of the ceiling wall part in the vegetable compartment of the refrigerator which concerns on Embodiment 1 of this invention. It is a figure which shows the other example of the left-right vertical cross-section of the vegetable compartment periphery of the refrigerator which concerns on Embodiment 1 of this invention. It is a figure which shows the other example of the left-right vertical cross-section of the vegetable compartment periphery of the refrigerator which concerns on Embodiment 1 of this invention. It is a front view which shows the back wall part seen from the vegetable compartment of the refrigerator which concerns on Embodiment 1 of this invention. It is a front view which shows the other example of the back wall part seen from the vegetable compartment of the refrigerator which concerns on Embodiment 1 of this invention. It is a front view which shows the other example of the back wall part seen from the vegetable compartment of the refrigerator which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows the vacuum heat insulating material in a part of wall part which divides the vegetable compartment of the refrigerator which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows the vacuum heat insulating material in some wall parts which divide the vegetable compartment of the refrigerator which concerns on Embodiment 1 of this invention seen from a back surface. It is a schematic diagram which shows the heat retention heater installed in the vegetable compartment of the refrigerator which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows the radiating pipe installed in the vegetable compartment of the refrigerator which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows the heat dissipation pipe in the refrigerant circuit of the refrigerator which concerns on Embodiment 1 of this invention. It is a figure which shows the flow-rate characteristic of the outlet pipe side which is not connected to the heat radiation pipe to the vegetable compartment in the flow-path switching three-way valve of the refrigerator which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the structure of the flow-path switching three-way valve of the refrigerator which concerns on Embodiment 1 of this invention. It is a figure which shows collectively the flow-path formation state with respect to STEP of the rotary gear in the flow-path switching three-way valve of Embodiment 1 of this invention, and FIG.25 (a) is a figure which shows 0 STEP state of a rotary gear. 25 (b) is a diagram showing a case where the flow passage is closed in the 4STEP state of the rotary gear, and FIG. 25 (c) is a diagram showing a case where the aperture A is obtained in the 36STEP state of the rotary gear. FIG. 25 (d) is a diagram showing a case where the stop B is in the 73 STEP state of the rotary gear, FIG. 25 (e) is a view showing a case where the stop C is in the 110 STEP state of the rotary gear, and FIG. It is a figure which shows the case where a flow path is opened in the 177STEP state of a rotary gear, and FIG.25 (g) is a figure which shows a case where it becomes a stage contact in the 200STEP state of a rotary gear. It is explanatory drawing which shows the rotary pad and valve seat in the flow-path switching three-way valve of the refrigerator which concerns on Embodiment 1 of this invention by the AA cross section of FIG.25 (c). [Fig. 27] Fig. 27 is a view collectively showing the blowout air passage and the return air passage of the cool air to the refrigerating compartment of the refrigerator according to Embodiment 1 of the present invention, and Fig. 27 (a) is a blowout air passage and the return wind of the cool air to the refrigerating compartment. FIG. 27 (b) is an explanatory view showing the air passage in a vertical cross section, FIG. 27 (b) is an explanatory view showing a blowout path of cold air into the refrigerating compartment in a longitudinal cross section, and FIG. It is an explanatory view showing a return airway by a longitudinal cross section. [Fig. 28] Fig. 28 is a diagram collectively showing a blowout air passage and a return wind passage of cold air to the ice making chamber of the refrigerator according to the first embodiment of the present invention, and Fig. 28 (a) is a blow air passage and return wind of the cool air to the ice making chamber. FIG. 28B is an explanatory view showing a right and left vertical cross-sections, and FIG. 28B is a perspective view showing a blowout state of cold air in the ice making chamber. [Fig. 29] Fig. 29 is a diagram collectively showing a cool air blowing air passage and a return air passage to the temperature switching chamber of the refrigerator according to the first embodiment of the present invention. FIG. 29B is an explanatory diagram showing the return air passage in a left-right longitudinal section, and FIG. 29B is an explanatory diagram showing the return air passage of the cool air from the temperature switching chamber in a front-rear longitudinal section. FIG. 30 is a diagram collectively showing a cool air blowout air path and a return airflow path to the freezer compartment of the refrigerator according to the first embodiment of the present invention, and FIG. Fig. 30 (b) is an explanatory view showing the air passage in the left-right longitudinal section, and Fig. 30 (b) is an explanatory view showing the blow-out air passage and the return air passage for the cool air in the freezing compartment in the front-rear longitudinal section. It is a front view which shows the back wall part seen from the vegetable compartment of the refrigerator which concerns on Embodiment 2 of this invention. It is a front view which shows the other example of the back surface wall part seen from the vegetable compartment of the refrigerator which concerns on Embodiment 2 of this invention. It is a front view which shows the other example of the back surface wall part seen from the vegetable compartment of the refrigerator which concerns on Embodiment 2 of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In each drawing, the same reference numerals are the same or equivalent to each other, and this is common to all the texts of the specification.
Furthermore, the forms of the constituent elements shown in the entire specification are merely examples, and the present invention is not limited to these descriptions.

Embodiment 1.
FIG. 1 is an external perspective view showing a refrigerator 1 according to Embodiment 1 of the present invention.
As shown in FIG. 1, the refrigerator 1 is laid out in the order of a refrigerating room 2, an ice making room 3 on the left side, and a temperature switching room 4 on the right side next to the ice making room 3, a vegetable room 5, and a freezing room 6 in this order. There is. The storage compartments such as the refrigerating compartment 2, the ice making compartment 3, the temperature switching compartment 4, the vegetable compartment 5, and the freezing compartment 6 are partitioned by partitions (not shown).
The refrigerator 1 includes a box body 19 formed of a vertically long rectangular parallelepiped. The box body 19 includes a top surface portion, a bottom surface portion, a right side surface portion, a left side surface portion, a rear surface portion, and a door portion of each storage room of the refrigerating room 2, the ice making room 3, the temperature switching room 4, the vegetable room 5, and the freezing room 6. Have

FIG. 2 is a diagram showing the refrigerant circuit 7 of the refrigerator 1 according to the first embodiment of the present invention.
As shown in FIG. 2, in the refrigerant circuit 7 of the refrigerator 1, the refrigerant discharged from the compressor 8 is supplied to the air-cooled condenser 9 installed in the machine room (not shown). Then, the refrigerant flowing through the air-cooled condenser 9 flows through the condenser 10 installed inside the urethane of the main body of the refrigerator 1. The refrigerant flowing through the condenser 10 is a dew-prevention pipe that is spread around the storage compartments of the refrigerating compartment 2, the ice making compartment 3, the temperature switching compartment 4, the vegetable compartment 5, and the freezing compartment 6 on the front surface of the refrigerator 1. Circulate 11. The refrigerant flowing through the dew-prevention pipe 11 is condensed in the condensation process. The refrigerant flowing through the dew-prevention prevention pipe 11 is supplied to the decompression device 13 after passing through the dryer 12. The refrigerant decompressed by the decompression device 13 is supplied to one cooler 14. The refrigerant supplied to the cooler 14 evaporates in the cooler 14 and exchanges heat with the cool air forcibly circulated internally by the blower 15. The cold air generated by the heat exchange of the cooler 14 cools each storage chamber in the refrigerator 1. The refrigerant that has undergone heat exchange in the cooler 14 rises in temperature while exchanging heat with the decompression device 13 via the suction pipe, and returns to the compressor 8.
The cool air of the refrigerator 1 is first supplied to the cooler 14. Then, the cool air forcibly circulated internally by the blower 15 exchanges heat with the refrigerant in the cooler 14. The cold air generated by the heat exchange of the cooler 14 cools the refrigerating compartment 2, the ice making compartment 3, the temperature switching compartment 4, the vegetable compartment 5, and the freezing compartment 6 in the refrigerator 1.

FIG. 3 is an explanatory diagram showing a vertical cross section in the left-right direction of the refrigerator 1 according to Embodiment 1 of the present invention.
As shown in FIG. 3, the respective temperature sensors 16a, 16b, 16c, 16d installed in the respective storage compartments of the refrigerating compartment 2, the ice making compartment 3, the temperature switching compartment 4, the vegetable compartment 5, and the freezing compartment 6 respectively store Detects indoor air temperature or stored food temperature. The detected temperature information is input to the control board 17 installed on the upper rear side inside the refrigerator 1. On the control board 17, a microcomputer and various electronic components for performing various controls of the refrigerator 1 are arranged. The control board 17 operates the air volume adjusting devices (dampers) 18a, 18b, 18c for each storage chamber in accordance with the input temperature information. The air volume adjusting devices 18a, 18b, and 18c are electrical components that adjust the opening and closing of the air passage.
Thereby, the air volume of the cool air circulating through each storage chamber and the cooler 14 is adjusted by the air volume adjusting devices 18a, 18b, 18c in accordance with the temperatures detected by the temperature sensors 16a, 16b, 16c, 16d. Keep the storage room at the proper temperature.

FIG. 4 is an explanatory view showing a cross section of a part of the wall portion 20 of the box body 19 of the refrigerator 1 according to Embodiment 1 of the present invention.
As shown in FIG. 4, the wall portion 20 of the box body 19 includes a sheet metal 21 forming an outer shell, an inner box 22 forming each storage chamber inner wall, and a heat insulating material 23 between the sheet metal 21 and the inner box 22. , And suppresses the amount of heat entering from the outside.
Here, a vacuum heat insulating material 24 is attached to the outer sheet metal 21 of the heat insulating material 23 so that the vacuum heat insulating material 24 can greatly reduce the amount of heat intrusion. The vacuum heat insulating material 24 is a rectangular plate shape arranged in each wall portion 20.

  In addition to the vacuum heat insulating material 24, the heat insulating material 23 mainly uses urethane foam material. As the heat insulating material 23, various internal members such as a reinforcing member for correcting the distortion of the refrigerator 1, the above-mentioned refrigerant circuit parts, and electric wiring parts are arranged in a space for enclosing the urethane foam material, and these inscribed members are It is fixed with urethane foam.

FIG. 5: is explanatory drawing which shows some cross sections of the wall part 20 of the left side surface part in the box 19 of the refrigerator 1 which concerns on Embodiment 1 of this invention.
As shown in FIG. 5, the heat insulating material 23 of the wall portion 20 on the left side surface of the box body 19 of the refrigerator 1 is a drawer type storage chamber in addition to the above-mentioned internal members in the space for enclosing the urethane foam material. The support 25 having a rail structure for receiving the frame structure constituting the door is also arranged as an inscribed member, and these inscribed members are fixed by urethane foam. Further, the heat insulating material 23 is formed in a fixed shape of a rail structure that receives a frame structure that constitutes a door of a drawer type storage chamber.

FIG. 6 is an explanatory diagram showing another example of the cross section of a part of the wall portion 20 of the box body 19 of the refrigerator 1 according to the first embodiment of the present invention. FIG. 7: is explanatory drawing which shows the other example of a part of cross section of the wall part 20 of the box body 19 of the refrigerator 1 which concerns on Embodiment 1 of this invention.
As shown in FIG. 6, the vacuum heat insulating material 24 arranged on the heat insulating material 23 may be arranged using a spacer 26 at an intermediate position between the wall surfaces of the outer metal plate 21 and the inner box 22 depending on the installation location. As shown in FIG. 7, the vacuum heat insulating material 24 arranged on the heat insulating material 23 may be attached to the wall surface of the inner box 22 depending on the installation location. As described above, the vacuum heat insulating material 24 arranged on the heat insulating material 23 may be arranged by any of the methods shown in FIGS. 4, 6, and 7. However, the vacuum heat insulating material 24 is installed so as not to interfere with the above-mentioned internal member.

The covering area of the vacuum heat insulating material 24 arranged on the heat insulating material 23 of the box body 19 of the refrigerator 1 secures 40% or more of the entire outer surface area including the door surface area of each storage chamber. Further, the foam density of the urethane foam material enclosed around the vacuum heat insulating material 24 is ensured to be 60 kg / cm ³ or more. In addition, the flexural modulus of the urethane foam material is 15.0 MPa or more. This ensures the strength of the box body 19 of the refrigerator 1.
In this way, by disposing the vacuum heat insulating material 24 on the heat insulating material 23 of the box body 19 of the refrigerator 1, the distance that is the heat insulating thickness between the outer shell of the refrigerator 1 and the inner wall of the inner box 22 is narrowed. Thereby, the internal volume of the refrigerator 1 can be increased.

  As shown in FIG. 3, the refrigerator 1 has easy access to the storage compartments of the refrigerating compartment 2, the ice making compartment 3, the temperature switching compartment 4, the vegetable compartment 5, and the freezing compartment 6 and balances the internal volume of each compartment. In consideration of the above, the distance L from the floor surface to the refrigerating compartment floor surface is set to be 954 mm or more and 994 mm or less.

As shown in FIG. 3, the cooler 14 is housed in a cooler chamber 27 formed on the back surface of the ice making chamber 3, the temperature switching chamber 4, and the vegetable chamber 5. The lower end of the cooler 14 is located in the cooler chamber 27 below the floor surface F of the vegetable compartment 5.
Since the lower end of the cooler 14 is located below the floor surface F of the vegetable compartment 5, a larger space can be secured above the cooler 14. As a result, the degree of freedom of the size of the blower 15 that is arranged in this space and blows cool air to the storage compartments of the refrigerating compartment 2, the ice making compartment 3, the temperature switching compartment 4, the vegetable compartment 5, and the freezing compartment 6 is increased. In addition, above the blower 15, air volume adjusting devices 18a, 18b, 18c, which are held by the foamed heat insulating material, are provided to the air passages toward the storage chambers.

FIG. 8: is a figure which shows the front-back longitudinal cross-section of the lower part periphery of the refrigerator 1 which concerns on Embodiment 1 of this invention. FIG. 9: is a figure which shows the left-right vertical cross section of the lower part periphery of the refrigerator 1 which concerns on Embodiment 1 of this invention.
As shown in FIG. 8, a return air passage 28 for air circulation from the refrigerating compartment 2 is formed on the right side surface of the cooler 14. As shown in FIG. 9, a return air passage 29 of the temperature switching chamber 4 and a blowing air passage 30 to the vegetable compartment 5 are formed in front of the return air passage 28 for air circulation from the refrigerating compartment 2.
As shown in FIG. 9, in front of the cooler 14 and the air passages 29 and 30 described above, a back wall portion 31 that is a heat insulating wall with respect to the space inside the vegetable compartment 5 is formed.

FIG. 10: is a figure which shows the left-right longitudinal cross-section of the vegetable compartment 5 periphery of the refrigerator 1 which concerns on Embodiment 1 of this invention.
As shown in FIG. 10, the ceiling wall portion 32 of the vegetable compartment 5 is a partition between the ice making compartment 3 and the temperature switching compartment 4. The ceiling wall portion 32 is a heat insulating wall, and heat transfer is suppressed.
The ceiling wall portion 32 has an outer shell made of an injection molded material, and the inside thereof is made of a vacuum heat insulating material 33 and a urethane foam material 34. The vacuum heat insulating material 33 is installed on the side of the ice making chamber 3 and the temperature switching chamber 4 which are set at a temperature lower than that of the vegetable chamber 5. The vacuum heat insulating material 33 is a single rectangular plate.
The thickness of the urethane foam material 34 is set to 7 mm or more in consideration of fluidity during manufacturing and manufacturing variation.

As shown in FIG. 10, the bottom wall portion 35 of the vegetable compartment 5 is a partition with the freezer compartment 6. The bottom wall portion 35 is a heat insulating wall, and heat transfer is suppressed.
Similar to the ceiling wall portion 32, the bottom wall portion 35 has an outer shell made of an injection molded material, and the inside thereof is made of a vacuum heat insulating material 36 and a urethane foam material 37. The vacuum heat insulating material 36 is installed on the freezer compartment 6 side, which is set to a temperature lower than that of the vegetable compartment 5. The vacuum heat insulating material 36 is a single rectangular plate.
The thickness of the urethane foam material 37 is set to 7 mm or more in consideration of the fluidity at the time of manufacturing and the manufacturing variation.

  The vacuum heat insulating materials 33 and 36 arranged on the ceiling wall portion 32 and the bottom wall portion 35 of the vegetable compartment 5 are vacuumed by wrapping them with urethane foam materials 34 and 37 in the urethane injecting step in the manufacturing process of the refrigerator 1. The deterioration of the heat insulating materials 33 and 36 is suppressed.

FIG. 11: is explanatory drawing which shows the longitudinal cross section of the other example of the ceiling wall part 32 in the vegetable compartment 5 of the refrigerator 1 which concerns on Embodiment 1 of this invention.
As shown in FIG. 11, in the ceiling wall portion 32, the vacuum heat insulating material 33 is arranged in the middle of the partition outer wall surface by ensuring the viscosity and the flow passage width of the urethane foam material 34, and the urethane foam material 34 is used. The vacuum insulating material 33 may be wrapped around the entire body to further suppress deterioration.

FIG. 12: is explanatory drawing which shows the vertical cross section of the other example of the ceiling wall part 32 in the vegetable compartment 5 of the refrigerator 1 which concerns on Embodiment 1 of this invention.
As shown in FIG. 12, in the ceiling wall portion 32, the vacuum heat insulating material 33 may be arranged on the vegetable compartment 5 side of the partition outer wall surface. In this case, the vacuum heat insulating material 33 can increase the coverage of the inner wall surface of the vegetable compartment 5 and suppress the amount of heat penetration.

  As shown in FIG. 10, a rear surface wall portion 31 that separates the vegetable compartment 5 and the cooler compartment 27 is formed on the rear surface of the vegetable compartment 5. The back wall portion 31 is a heat insulating wall, and its internal configuration is configured by using a heat insulating wall outer shell 38, a vacuum heat insulating material 39, and a foam heat insulating material 40 installed so as to surround the vacuum heat insulating material 39. . That is, in the back wall portion 31 of the vegetable compartment 5, a single rectangular plate-shaped vacuum heat insulating material 39 is arranged between the inner wall of the vegetable compartment 5 and the cooler 14.

The thickness of the foamed heat insulating material 40 of the back wall portion 31 is based on the limit thickness at which molding is possible, and a necessary heat insulating thickness is provided if there is an additional function. When PS-FO is used as the material of the foamed heat insulating material 40, for example, when the expansion ratio is 40 times, the thickness is set to be at least 5 mm or more.
The foamed heat insulating material 40 of the back wall portion 31 is provided with an air passage 41 for blowing air to the freezing compartment 6. The front and rear arrangement of the air passage 41 includes the cooler 14, the heat insulating wall outer shell 42, the foam heat insulating material 40 having the structure of the air passage 41, the vacuum heat insulating material 39, the foam heat insulating material 40, and the inner wall of the vegetable compartment 5 from the rear. It is arranged in the order of the heat insulating wall outer shells 38. Then, as shown in FIG. 8, the air passage 41 to the freezer compartment 6 described above is arranged on the front projection surface of the cooler 14. That is, the back wall portion 31 of the vegetable compartment 5 separates the air passage 41 to the cooler 14 and the freezer compartment 6 from the vegetable compartment 5 with the vacuum heat insulating material 39 over a wider area than the front projection surface of the cooler 14 and the air passage 41. ing.

As shown in FIG. 10, the airflow volume adjusting device 18c for the vegetable compartment 5 is held by the foamed heat insulating material 40 having the air passage 41 of the back wall portion 31 of the vegetable compartment 5.
The air volume adjusting devices 18a, 18b, 18c for each storage room may be stored in the back wall part of the other room above the vegetable room 5 instead of being provided in the back wall part 31 of the vegetable room 5. According to this, it is not necessary to provide an extra space behind the vegetable compartment 5, and the large-capacity vegetable compartment 5 is provided.

FIG. 13: is a figure which shows the other example of the left-right vertical cross section of the vegetable compartment 5 periphery of the refrigerator 1 which concerns on Embodiment 1 of this invention.
As shown in FIG. 13, the vacuum heat insulating material 39 of the back wall portion 31 of the vegetable compartment 5 is attached to the inner wall of the heat insulating wall outer shell 42 on the cooler 14 side in order to further secure the effect of the vacuum heat insulating material 39. Is also good. That is, the vacuum heat insulating material 39 of the back wall portion 31 of the vegetable compartment 5 is provided on the cooler 14 side in the back wall portion 31.
In that case, the size of the vacuum heat insulating material 39 in the height direction is slightly reduced due to the restriction of the position or the size of the outlet of the cool air discharged from the blower 15. Further, since the vacuum heat insulating material 39 is not covered with the foam heat insulating material 40, there is a possibility that deterioration of the vacuum heat insulating material 39 may be accelerated.

FIG. 14: is a figure which shows the other example of the left-right vertical cross-section of the vegetable compartment 5 periphery of the refrigerator 1 which concerns on Embodiment 1 of this invention.
As shown in FIG. 14, the back wall portion 31 of the vegetable compartment 5 has a foam heat insulating material 40 for protecting the vacuum heat insulating material 39 by solving the problem in the case shown in FIG. It may be installed between the inner wall of the heat insulating wall outer shell 42 on the 14th side.

FIG. 15: is a front view which shows the back wall part 31 seen from the vegetable compartment 5 of the refrigerator which concerns on Embodiment 1 of this invention.
As shown in FIG. 15, in the back wall portion 31 of the vegetable compartment 5, one rectangular plate-shaped vacuum heat insulating material 39 is arranged between the inner wall of the vegetable compartment 5 and the cooler 14.
The size of the plane portion of the vacuum heat insulating material 39 is larger than the front projected area of the cooler 14. The air passage 41 to the freezer compartment 6 is arranged on the front projection surface of the cooler 14. Therefore, as shown in FIG. 10, the rear wall portion 31 of the vegetable compartment 5 vacuum-insulates the air passage 41 to the cooler 14 and the freezer compartment 6 over a wider range than the front projection surface of the cooler 14 and the air passage 41. It is separated from the vegetable compartment 5 by a material 39. As a result, the one-dimensional amount of heat transfer passing through the back wall portion 31 of the vegetable compartment 5 toward the inside of the vegetable compartment 5 is suppressed to the maximum extent.

As shown in FIG. 15, the cold air outlet 44 into the vegetable compartment 5 is formed in the upper right portion of the inner wall of the back wall portion 31 of the vegetable compartment 5. The cold air outlet 44 does not overlap with the front projection surface of the single rectangular plate-shaped vacuum heat insulating material 39 arranged on the rear wall portion 31 of the vegetable compartment 5 and is located outside the front projection surface. There is.
The cool air blowout port 44 has an air flow rate for the vegetable compartment in which the cool air generated by the blower 15 disposed above the cooler 14 is held in the foamed heat insulating material 40 above the cooler compartment 27 by the blower 15. It is supplied via the adjusting device 18c.
The cold air outlet 44 may be formed on the inner wall of the wall portion of the vegetable compartment 5 other than the back wall portion 31.

The cold air return port 45 from the vegetable compartment 5 is formed on the lower left side diagonally with respect to the cold air outlet 44 in the inner wall of the back wall portion 31 of the vegetable compartment 5. The cold air return port 45 does not overlap with the front projection surface of the rectangular plate-shaped vacuum heat insulating material 39 arranged on the back wall portion 31 of the vegetable compartment 5 and is located outside the front projection surface. There is.
The cold air blown out from the cold air blowout port 44 is discharged from the cold air return port 45 located at a diagonal corner of the inner wall of the vegetable compartment 5 with respect to the cold air blowout port 44, guided to the cooler 14, and cooled again. It is circulated so as to be cooled by passing through the vessel 14.
The cold air return port 45 may be formed on the inner wall of the wall portion of the vegetable compartment 5 other than the back wall portion 31.

As shown in FIG. 15, one rectangular, plate-shaped vacuum heat insulating material 39 arranged on the back wall portion 31 of the vegetable compartment 5 avoids the vertical projection regions of the cold air blowout port 44 and the cold air return port 45, and extends vertically and horizontally. Are installed so that the sides of are substantially parallel to the vertical and horizontal directions.
Note that, unlike the configuration shown in FIG. 15, one rectangular plate-shaped vacuum heat insulating material 39 arranged on the back wall portion 31 of the vegetable compartment 5 has a horizontal projection area of the cold air outlet 44 and the cold air return port 45. Alternatively, the vertical and horizontal sides may be installed so as to be substantially parallel to the vertical direction and the horizontal direction.
In addition, one rectangular and plate-shaped vacuum heat insulating material 39 arranged on the back wall portion 31 of the vegetable compartment 5 is arranged vertically and horizontally as long as it is arranged so as not to block the cold air outlet 44 and the cold air return port 45. The sides may be installed so as to be inclined with respect to the vertical direction and the horizontal direction.

FIG. 16: is a front view which shows the other example of the back surface wall part 31 seen from the vegetable compartment 5 of the refrigerator 1 which concerns on Embodiment 1 of this invention. FIG. 17: is a front view which shows the other example of the back surface wall part 31 seen from the vegetable compartment 5 of the refrigerator 1 which concerns on Embodiment 1 of this invention.
As shown in FIG. 16, the cold air outlet 44 may be formed in the upper right portion of the inner wall of the back wall portion 31 of the vegetable compartment 5. At this time, the cold air return port 45 is formed in the lower right portion of the inner wall of the back wall portion 31 of the vegetable compartment 5.
Further, as shown in FIG. 17, the cold air outlet 44 may be formed in the upper left portion of the inner wall of the back wall portion 31 of the vegetable compartment 5. At this time, the cold air return port 45 is formed in the lower left portion of the inner wall of the back wall portion 31 of the vegetable compartment 5.
That is, in the configuration shown in FIGS. 16 and 17, the cold air outlet 44 and the cold air return port 45 are located in the same range in the vertical direction on the inner wall of the vegetable compartment 5. The cold air outlet 44 and the cold air return port 45 may be located in the same range in the horizontal direction of the inner wall of the vegetable compartment 5.
In the case of the configuration shown in FIGS. 16 and 17, the size of the flat surface portion of the vacuum heat insulating material 39 in the back wall portion 31 of the vegetable compartment 5 becomes larger. Therefore, the vacuum heat insulating material 39 is also arranged in the portion where the other air passage is formed, the coverage of the vegetable room 5 with the vacuum heat insulating material 39 is increased, and the heat insulation of the vegetable room 5 is strengthened.

FIG. 18: is a schematic diagram which shows the vacuum heat insulating material 24,33,36,39 in some wall parts 20 which divide the vegetable compartment 5 of the refrigerator 1 which concerns on Embodiment 1 of this invention. FIG. 19: is a schematic diagram which shows the vacuum heat insulating materials 24, 33, 36, 39 in some wall parts 20 which divide the vegetable compartment 5 of the refrigerator 1 which concerns on Embodiment 1 of this invention seen from a back surface.
The refrigerator 1 includes a vegetable compartment 5 that is set to a temperature higher than that of the upper ice making compartment 3 and the temperature switching compartment 4 and the lower freezing compartment 6 and stores a food item such as a vegetable. As shown in FIGS. 18 and 19, the vegetable compartment 5 includes the right side wall portion, the left side surface portion, the ceiling wall portion 32, the bottom wall portion 35, the rear wall portion 31, and the door wall portion that partition the vegetable compartment 5. 20 is provided with one rectangular vacuum heat insulating material 24, 33, 36, 39, respectively.
Here, the right side wall portion of the vegetable compartment 5 is a rectangular plate-like member over the right side wall portion 20 of the entire box body 19 of the refrigerator 1 including other storage compartments above and below the vegetable compartment 5. A vacuum heat insulating material 24 is arranged. The left side wall portion of the vegetable compartment 5 is a rectangular and plate-shaped vacuum heat insulating material over the left side wall portion 20 of the entire box body 19 of the refrigerator 1 including other storage compartments above and below the vegetable compartment 5. 24 are arranged.
On the other hand, the ceiling wall portion 32 of the vegetable compartment 5 is provided with one rectangular and plate-shaped vacuum heat insulating material 33. The bottom wall portion 35 of the vegetable compartment 5 is provided with one rectangular and plate-shaped vacuum heat insulating material 36. On the back wall portion 31 of the vegetable compartment 5, one rectangular and plate-shaped vacuum heat insulating material 39 is arranged so as to separate the cooler compartment 27. The rectangular plate-shaped vacuum heat insulating material 24 is arranged on the door wall of the vegetable compartment 5.

  With this structure, the vacuum heat insulating materials 24, 33, 36, and 39 cover all six surfaces of the vegetable compartment 5, which is substantially a rectangular parallelepiped or a cube. Therefore, the coverage of the vacuum heat insulating materials 24, 33, 36, 39 with respect to the total wall surface area of the vegetable compartment 5 is 80% or more. Thereby, heat transfer from the vegetable compartment 5 to another storage compartment can be suppressed. Alternatively, cold heat transfer from the other storage room and the cooler room 27 to the vegetable room 5 can be suppressed. Further, the amount of heat entering the vegetable compartment 5 from the outside can be suppressed by the right side wall portion, the left side wall portion and the door wall portion.

FIG. 20: is a schematic diagram which shows the heat retention heater 46 installed in the vegetable compartment 5 of the refrigerator 1 which concerns on Embodiment 1 of this invention.
When configured as shown in FIGS. 18 and 19, the average temperature of the vegetable compartment 5 tends to decrease. Therefore, as shown in FIG. 20, the vegetable compartment 5 may be provided with a heat retention heater 46 that uses electric resistance in order to maintain the indoor temperature of the vegetable compartment 5 when necessary.
The heat-retaining heater 46 of the vegetable compartment 5 has an arbitrary capacity of 3 W or more and 10 W or less at an arbitrary position on the bottom surface, the back surface, or both left and right sides of the vegetable compartment 5, particularly at a point where the indoor temperature of the vegetable compartment 5 is relatively low. Will be installed in. The heat retention heater 46 is energized at a time-based energization rate (energization time / standard time) depending on the outside air temperature and the room temperature of the vegetable compartment 5.

FIG. 21: is a schematic diagram which shows the radiation pipe 47 installed in the vegetable compartment 5 of the refrigerator 1 which concerns on Embodiment 1 of this invention.
As shown in FIG. 21, in the vegetable compartment 5, a heat radiating pipe 47 is installed inside the urethane foam insulation material on the left and right side walls of the box body 19 for the purpose of keeping the temperature of the vegetable compartment 5 in addition to the heat retention heater 46. May be. Further, in the vegetable compartment 5, a heat radiating pipe 47 may be installed on the side of the heat insulating material inside the partition of the bottom wall portion 35 for the purpose of maintaining the temperature of the vegetable compartment 5. The heat radiating pipe 47 circulates the refrigerant used in the cooler 14 to radiate heat into the vegetable compartment 5.
The amount of heat radiated from the heat radiating pipe 47 into the vegetable compartment 5 is such that the heat radiating pipe 47 has a unit heat radiating amount of 1.5 W / m to 3.0 W / m and a length of 5 m or more. It is good to secure about 5W. According to this, in the vegetable compartment 5 having an internal volume of about 90 L, a temperature increasing effect of about 2 ° C. or more and 3 ° C. or less can be obtained.
When the capacity of the vegetable compartment 5 is large, it is advisable to adjust the length of the heat radiation pipe 47 as appropriate.

FIG. 22: is a schematic diagram which shows the heat dissipation pipe 47 in the refrigerant circuit 7 of the refrigerator 1 which concerns on Embodiment 1 of this invention.
As shown in FIG. 22, on the refrigerant circuit 7, the heat radiation pipe 47 is connected to the dryer 12 via the dew condensation prevention pipe 11 on the surface of the refrigerator 1, and then the flow path switching is performed downstream of the flow path switching three-way valve 48. The three-way valve 48 is connected so as to be switched.
Of the two outlet pipes 49, 50 of the flow path switching three-way valve 48, one outlet pipe 49 on one side is connected to one side of two capillary tubes 51. The capillary tube 51 to which the outlet pipe 49 is connected may be capable of changing the reduced pressure amount. The remaining outlet pipe 50 is connected to the heat radiation pipe 47 to the vegetable compartment 5 described above.
According to this structure, the heat radiating pipe 47 radiates the heat of the refrigerant into the vegetable compartment 5, and the load increases on the air side, but on the refrigerating cycle side, the condensing capacity of the refrigerant increases, so that the refrigerating cycle Efficiency is improved.
That is, in the case of heat radiation to the inside of the vegetable compartment 5 by the heat retention heater 46, the load on the air side and the increase in the heater input greatly affect the amount of power consumption. Therefore, the heat dissipation to the inside of the vegetable compartment 5 by the heat dissipation pipe 47 is relatively superior in power consumption.

  As shown in FIG. 22, on the downstream side of the flow path switching three-way valve 48, the other outlet pipe 49 that is not connected to the heat radiation pipe 47 to the vegetable compartment 5 pseudo-electronically controls the flow rate of the refrigerant to be discharged. It would be good if the expansion valve could be adjusted in multiple stages. As a result, the amount of power consumption can be further reduced.

FIG. 23 is a diagram showing flow rate characteristics on the outlet pipe 49 side of the flow path switching three-way valve 48 of the refrigerator 1 according to Embodiment 1 of the present invention, which is not connected to the heat radiation pipe 47 to the vegetable compartment 5.
As shown in FIG. 23, in the flow path switching three-way valve 48, the flow rate characteristic of the other outlet pipe 49 side which is not connected to the heat radiation pipe 47 to the vegetable compartment 5 is flow rate controlled in five stages. The five-stage flow rate control is switching between fully closed, throttle flow rate A, throttle flow rate B, throttle flow rate C, and full open.

24: is explanatory drawing which shows the structure of the flow-path switching three-way valve 48 of the refrigerator 1 which concerns on Embodiment 1 of this invention.
As shown in FIG. 24, the flow path switching three-way valve 48 is roughly divided into a low voltage four-phase stepping motor 52 and a valve body 53. Inside the valve main body 53, a magnetized rotor 54, a center gear 55, a rotary gear 56, a rotary pad 57, a valve seat 58, an outer case 59, and a floor plate 60 are provided as main components.
The flow path switching three-way valve 48 rotates the magnetizing rotor 54 by unipolar drive of the 4-phase stepping motor 52 by 1-2 phase excitation. The magnetized rotor 54 is directly connected to the center gear 55, and when the magnetized rotor 54 rotates, the center gear 55 rotates in the same direction and in the same amount as the magnetized rotor 54.

  25: is a figure which shows collectively the flow path formation state with respect to STEP of the rotary gear 56 in the flow path switching three-way valve 48 of the refrigerator 1 which concerns on Embodiment 1 of this invention, FIG. 25B is a view showing a case where the flow path is closed in the 4STEP state of the rotary gear 56, and FIG. 25C is a view showing the diaphragm A in the 36STEP state of the rotary gear 56. FIG. 25 (d) is a diagram showing a case where the aperture B is in the 73 STEP state of the rotary gear 56, and FIG. 25 (e) is a case where the aperture C is in the 110 STEP state of the rotary gear 56. FIG. 25 (f) is a diagram showing a case where the flow path is opened in the 177 STEP state of the rotary gear 56, and FIG. 25 (g) is a case in which the step is reached in the 200 STEP state of the rotary gear 56. In the figure .

As shown in FIG. 25, the center gear 55 and the rotary gear 56 are directly joined. Therefore, the rotary pad 57 fixed to the rotary gear 56 receives the rotational drive of the center gear 55 with reference to the central axis provided on the valve seat 58, and performs a rotational operation.
The rotary pad 57 is provided with three orifices 61, 62, 63 having different inner diameters. When any one of the three orifices 61, 62, 63 is overlapped with the outlet orifice 64 of the valve seat 58 by the rotation operation of the rotary pad 57, a predetermined flow rate is discharged.
As shown in FIG. 25B, when the flow path is closed in the 4STEP state of the rotary gear 56, the flow rate of the flow path switching three-way valve 48 is in the fully closed state of FIG. As shown in FIG. 25C, when the rotary gear 56 is in the 36 STEP state and the throttle A is set, the flow rate of the flow path switching three-way valve 48 becomes the flow rate A state in FIG. As shown in FIG. 25D, when the rotary gear 56 is in the 73 STEP state and the throttle B is set, the flow rate of the flow path switching three-way valve 48 becomes the flow rate B state in FIG. 23. As shown in FIG. 25 (e), when the rotary gear 56 is in the 110 STEP state and the throttle C is set, the flow rate of the flow path switching three-way valve 48 becomes the flow rate C state in FIG. 23. As shown in FIG. 25 (f), when the flow path is opened in the 177 STEP state of the rotary gear 56, the flow rate of the flow path switching three-way valve 48 is in the fully open state in FIG. 23.

26: is explanatory drawing which shows the rotating pad 57 and the valve seat 58 in the flow-path switching three-way valve 48 of the refrigerator 1 which concerns on Embodiment 1 of this invention by the AA cross section of FIG.25 (c).
As shown in FIG. 26, the peripheral shape of the orifice 61 formed in the rotary pad 57 is deepened stepwise. The orifices 61, 62, 63 formed on the rotary pad 57 are very small and therefore difficult to mold. Therefore, the peripheral shapes of the orifices 61, 62, 63 require that the depths of the orifices 61, 62, 63 be shallow, and the backward driving (CCW) of the stepping motor 52 caused by the backlash of the connecting gear. Due to the relationship between the removal of the effect of hysteresis at the time and the removal of the variation in the chamfered shape of the outlet orifice 64 formed in the valve seat 58, the deep molding is performed stepwise as described above.
According to this structure, the influence of hysteresis at the time of reverse driving (CCW) of the stepping motor 52 can be removed, the flow rate can be stabilized, the stability of the molding die can be increased, and the risk of correcting the manufactured product can be suppressed. .

The flow path switching three-way valve 48 described above is switched to an optimal refrigerant flow rate by the load of the refrigerator 1, and the flow control range is increased compared to the flow path switching three-way valve that has been used conventionally. Further, in the flow path switching three-way valve 48, one required capillary tube for the purpose of adjusting the flow rate is reduced, and the cost can be suppressed at the same time.
When the warming heater 46 using electric resistance is used to keep the temperature of the vegetable compartment 5, only the flow control side of the two outlets of the flow passage switching valve is left as the flow passage switching valve. You may use a directional valve.

  27: is a figure which collectively shows the blowing air path 65 and return air path 28 of the cool air to the refrigerating room 2 of the refrigerator 1 which concerns on Embodiment 1 of this invention, and FIG. 27B is an explanatory diagram showing the cold air blowing air passage 65 and the return air passage 28 in a left-right vertical cross section, and FIG. 27B is an explanatory diagram showing the cold air blowing air passage 65 to the refrigerating chamber 2 in a front-rear vertical cross-section. 27 (c) is an explanatory view showing the return air passage 28 of the cool air from the refrigerating chamber 2 in a longitudinal cross section.

As shown in FIGS. 27 (a) and 27 (b), the cold air blowing air passage 65 to the refrigerating compartment 2 has a vegetable compartment 5 after the cool air is discharged from the blower 15 installed above the cooler 14. And the cooler chamber 27, and an air passage passing through the inside of the back wall portion 31, a wind passage toward the refrigerating chamber 2 in the foam heat insulating material above the cooler chamber 27, the refrigerating chamber 2, the ice making chamber 3, and An air passage in a foamed heat insulating material in a partition for partitioning the temperature switching chamber 4 and an air passage formed by a foamed heat insulating material installed on the back side of the refrigerating chamber 2 are connected to each other.
The air volume adjusting device 18a that adjusts the supply amount of cold air to the refrigerating compartment 2 adjusts the supply amount of cold air to the refrigerating compartment 2 in the middle of the blowout path 65 of the cool air to the refrigerating compartment 2. The air volume adjusting device 18a may be installed in any of the above air passages.
In addition, at least one cold air outlet in the refrigerating compartment 2 is formed on each storage item storage shelf in the refrigerating compartment 2 so that the cool air distribution in the shelves and the cool air distribution between the shelves are within 2 ° C. The blowing amount is adjusted.

  As shown in FIGS. 27 (a) and 27 (c), the return air passage 28 for the cool air from the refrigerating compartment 2 is installed on the right side of the cooler 14 using a foamed heat insulating material so that necessary heat insulation can be performed. It The outlet of the return air passage 28 of the cool air from the refrigerating compartment 2 is connected to the drip tray 66 which receives the molten water at the time of defrosting from the lower right side of the cooler 14 in the cooler compartment 27.

  As shown in FIG. 27 (a), when the necessary heat insulation is not ensured in the return air passage 28 from the refrigerating chamber 2, a heater for avoiding blockage of the return air passage 28 due to frost formation in the air passage. 67 is preferably provided. The heater 67 is installed in the air passage longitudinal direction at an arbitrary position in the return air passage 28 within a range larger than the vertical projection size of the cooler 14, and generates heat when necessary. The heater 67 may be provided along the flow direction of the return cool air within a range of 100 mm above and below the junction of the return air passage 28 and the drip tray 66, for example.

  28: is a figure which collectively shows the blowing air path 68 and return air path 69 of the cool air to the ice making chamber 3 of the refrigerator 1 which concerns on Embodiment 1 of this invention, and FIG. 28B is an explanatory view showing the blow-off air passage 68 and the return air passage 69 of the cold air in a vertical cross section, and FIG. 28B is a perspective view showing the blow-out state of the cool air in the ice making chamber 3.

As shown in FIG. 28 (a), the cold air blowing air passage 68 to the ice making chamber 3 is a foamed heat insulating material above the cooler chamber 27 after discharging cool air from the blower 15 installed above the cooler 14. An air passage toward the ice making chamber 3 inside is connected to an air passage formed on the back side of the ice making chamber 3 and formed of a foamed heat insulating material.
An air flow rate adjusting device (not shown) that adjusts the amount of cold air supplied to the ice making chamber 3 adjusts the amount of cold air supplied to the ice making chamber 3 midway along the air passage 68 for blowing the cool air to the ice making chamber 3. The air volume adjusting device may be installed in any of the above air passages.
As shown in FIG. 28B, the cold air blown out from the cold air blowout port 70 at an arbitrary position on the back surface of the ice making chamber 3 flows into the ice making mechanism 71.

As shown in FIG. 28 (a), the return air passage 69 from the ice making chamber 3 is projected from the front of the cooler 14 to the ice making chamber 3 side from the center of the refrigerator 1 within the entire width of the cooler 14 and at the rear projection of the ice making chamber 3. It is installed within the width.
The return air passage 69 from the ice making chamber 3 includes a cold air return port 72 arbitrarily installed in the back wall portion of the ice making chamber 3, a back side of the outer contour of the ice making chamber 3 and foaming adjacent to the outer contour of the surface of the ice making chamber 3. The outlet of the return air passage 69 from the ice making chamber 3 joins in the vicinity of the cold air return port from the freezing chamber 6 and is composed of a part of the heat insulating material. In order to avoid a merge pressure loss at the merge location, the cool air return port from the freezing compartment 6 near the discharge outlet of the cool air from the ice making compartment 3 has a range equal to or larger than the lateral width dimension of the return air passage 69 from the ice making compartment 3. is doing.
The return air passage 69 from the ice making chamber 3 may be directly returned to the inside of the cooler chamber 27 at a position above the cold air return port from the freezing chamber 6.

  FIG. 29: is a figure which shows collectively the blowing air path 73 and the return air path 29 of the cool air to the temperature switching chamber 4 of the refrigerator 1 which concerns on Embodiment 1 of this invention, and FIG. 29 (a) is a temperature switching chamber. 4 is an explanatory view showing the blow-off air passage 73 and the return air passage 29 of the cool air to the right and left longitudinal sections, and FIG. 29B shows the return air passage 29 of the cool air from the temperature switching chamber 4 in the front-and-rear longitudinal cross sections. It is a figure.

As shown in FIG. 29 (a), the blowout path 73 for the cool air to the temperature switching chamber 4 is formed above the cooler chamber 27 after discharging the cool air from the blower 15 installed above the cooler 14. An air passage toward the temperature switching chamber 4 in the heat insulating material and an air passage formed by a foam heat insulating material installed on the back side of the temperature switching chamber 4 are connected to each other.
The air volume adjusting device 18b that adjusts the supply amount of cold air to the temperature switching chamber 4 adjusts the supply amount of cold air to the temperature switching chamber 4 in the middle of the blowout path 73 of the cool air to the temperature switching chamber 4. The air volume adjusting device 18b may be installed in any of the above air passages.

  As shown in FIGS. 29A and 29B, the return air passage 29 from the temperature switching chamber 4 has a cold air return port arbitrarily installed in the back wall portion of the temperature switching chamber 4 and a temperature switching chamber. 4 The outer side of the outer surface of the temperature switching chamber 4 and a part of the foamed heat insulating material adjacent to the outer surface of the temperature switching chamber 4 are provided. It is installed on the right side of the return air passage.

  FIG. 30 is a diagram collectively showing the blow-out air passage 41 and the return air passage 74 of the cool air to the freezing compartment 6 of the refrigerator according to the first embodiment of the present invention, and FIG. FIG. 30 (b) is an explanatory view showing the cold air blowing air passage 41 and the return air passage 74 in a left-right longitudinal section, and FIG. 30 (b) shows the cold air blowing air passage 41 and the return air passage 74 to the freezing compartment 6 in a longitudinal cross section. FIG.

As shown in FIGS. 30 (a) and 30 (b), the cold air blowout air passage 41 to the freezing compartment 6 has a vegetable compartment 5 after the cool air has been discharged from the blower 15 installed above the cooler 14. And an air passage provided in the bottom wall portion 35 of the vegetable compartment 5 between the vegetable compartment 5 and the freezing compartment 6 between the vegetable compartment 5 and the freezer compartment 6. Connected and configured.
The cool air that has passed through the blow-off air passage 41 of the cool air to the freezing compartment 6 is guided by the guide portion provided at the back side ceiling of the freezing compartment 6 into the stored-item storage case stacked in multiple stages in the freezing compartment 6. Cool the stored material in the freezer compartment 6.

  As shown in FIGS. 30 (a) and 30 (b), the return air passage 74 from the freezing compartment 6 discharges cool air from the inside of the freezing compartment 6 by the guide portion provided on the rear ceiling of the freezing compartment 6. The air passage is formed within the width of the cooler 14 provided behind the bottom wall portion 35 of the vegetable compartment 5 between the rear vegetable compartment 5 and the freezing compartment 6. The outlet of the return air passage 74 from the freezer compartment 6 is, like the return air passage 28 from the refrigerating compartment 2, a drip tray that receives melted water during defrosting from the lower right side of the cooler 14 in the cooler compartment 27. Connected to 66.

  A guide portion (not shown) provided on the rear ceiling of the freezer compartment 6 serves both as a guide on the outlet side into the freezer compartment 6 and a guide on the return side from the inside of the freezer compartment 6, and faces the refrigerator 1 from the front. It is placed before and after. Specifically, a guide on the blowout side into the freezer compartment 6 is arranged on the front side of the refrigerator 1. A guide on the return side from the freezer compartment 6 is arranged on the back side of the refrigerator 1.

According to the first embodiment, refrigerator 1 is provided with vegetable compartment 5 which is set at a temperature higher than the surrounding other compartments and stores a food item such as a vegetable. In the vegetable compartment 5, one rectangular vacuum heat insulating material 24, 33, 36, 39 is arranged on each of the wall portions 20 that divide the six sides of the vegetable compartment 5.
According to this structure, the area covered by the vacuum heat insulating materials 24, 33, 36, 39 in the vegetable compartment 5 is increased as much as possible. Further, since the vacuum heat insulating materials 24, 33, 36, 39 are rectangular, the vacuum heat insulating materials 24, 33, 36, 39 are not provided with cutouts or holes, and the necessary heat insulating performance can be secured with a simple configuration. Therefore, the manufacturing cost can be reduced, the assembly is simple, and the manufacturing efficiency is good.

According to the first embodiment, refrigerator 1 is laid out in the order of refrigerating compartment 2, ice making compartment 3, temperature switching compartment 4, vegetable compartment 5, and freezing compartment 6 from the top.
According to this configuration, the ice making chamber 3 and the temperature switching chamber 4 that store a stored item such as food at a temperature lower than that of the vegetable chamber 5 are arranged above the vegetable chamber 5. In addition, a freezer compartment 6 that stores a stored product such as food at a temperature lower than that of the vegetable compartment 5 is arranged below the vegetable compartment 5. Therefore, cold heat may flow into the vegetable compartment 5 and the inside of the vegetable compartment 5 may be too cold. However, one rectangular vacuum heat insulating material 24, 33, 36, 39 is arranged on each wall portion 20 that divides the vegetable compartment 5. Thereby, the inflow of cold heat from the periphery of the vegetable compartment 5 to the inside of the vegetable compartment 5 can be prevented, and the inside of the vegetable compartment 5 does not become too cold. On the other hand, heat radiation from the inside of the vegetable compartment 5 to the surroundings of the refrigerator 1 outside the vegetable compartment 5 can be prevented, and the inside of the vegetable compartment 5 can be maintained at the set temperature with good thermal efficiency.
Further, the vegetable compartment 5 which is frequently used can be arranged at a position approximately at the waist of the user, and the convenience of the user can be improved.

According to the first embodiment, in the side wall portion of the vegetable compartment 5, one rectangular vacuum heat insulating material 24 is arranged over the two side wall portions of the entire box body 19 of the refrigerator 1 including other compartments. . Each of the ceiling wall portion 32, the bottom wall portion 35, the back wall portion 31, and the door wall portion of the vegetable compartment 5 is provided with one rectangular vacuum heat insulating material 24, 33, 36, 39.
According to this configuration, one rectangular vacuum heat insulating material 24 is arranged on the side wall portion of the vegetable compartment 5 over the two side wall portions of the entire box body 19 of the refrigerator 1 including other rooms, and is used for the refrigerator 1. The vacuum heat insulating material is efficiently arranged. Therefore, the number of vacuum heat insulating materials to be used can be reduced, the manufacturing cost can be reduced, the assembling can be facilitated, and the manufacturing efficiency can be improved.

According to the first embodiment, the cooler 14 is provided behind the vegetable compartment 5. In the rear wall portion 31 of the vegetable compartment 5, one rectangular vacuum heat insulating material 39 is arranged between the inner wall of the vegetable compartment 5 and the cooler 14.
With this configuration, it is possible to prevent cold heat from flowing into the vegetable compartment 5 from the cooler 14. Thereby, the temperature rise of the cooler 14 can be prevented. Further, it is possible to prevent the temperature of the back wall portion 31 of the vegetable compartment 5 from decreasing. Then, it is possible to prevent problems such as dew formation and frost formation in the vegetable compartment 5.

According to the first embodiment, the back wall portion 31 of the vegetable compartment 5 is provided with the cool air passage 41 that communicates with the freezer compartment 6 from the cooler 14 between the inner wall of the vegetable compartment 5 and the cooler 14. . The air passage 41 is arranged on the front projection surface of the cooler 14.
According to this configuration, the air passage 41 through which the cool air of low temperature flows can be gathered together with the cooler 14, and the thermal efficiency can be improved.

According to the first embodiment, one rectangular vacuum heat insulating material 39 arranged between the inner wall of the vegetable compartment 5 and the cooler 14 at the back wall portion 31 of the vegetable compartment 5 has the cooler 14 and the wind. It has a size that separates the passage 41 from the vegetable compartment 5 over a wider range than the front projection surfaces of the cooler 14 and the air passage 41.
According to this configuration, it is possible to prevent cold heat from flowing into the cooler 14 and the air passage 41 toward the inside of the vegetable compartment 5 with only one rectangular vacuum heat insulating material 39.

According to the first embodiment, refrigerator 1 is provided with vegetable compartment 5 which is set at a temperature higher than the surrounding other compartments and stores a food item such as a vegetable. The refrigerator 1 includes a cooler 14 provided behind the vegetable compartment 5. The refrigerator 1 includes a back wall portion 31 provided between the inner wall of the vegetable compartment 5 and the cooler 14. The refrigerator 1 includes a vacuum heat insulating material 39 provided on the cooler 14 side of the back wall portion 31.
With this configuration, it is possible to prevent cold heat from flowing into the vegetable compartment 5 from the cooler 14. Thereby, the temperature rise of the cooler 14 can be prevented. Further, it is possible to prevent the temperature of the back wall portion 31 of the vegetable compartment 5 from decreasing. Then, it is possible to prevent problems such as dew formation and frost formation in the vegetable compartment 5.

According to the first embodiment, the refrigerator 1 has the vacuum heat insulating materials 33 and 36 arranged on the ceiling wall portion 32 and the bottom wall portion 35 that partition the vegetable compartment 5 from the surrounding other compartments.
According to this configuration, the area covered by the vacuum heat insulating materials 33 and 36 in the vegetable compartment 5 is increased as much as possible. Further, the vacuum heat insulating materials 33 and 36 are not provided with notches or holes, and the necessary heat insulating performance can be secured with a simple configuration. In addition, the inflow of cold heat from the periphery of the vegetable compartment 5 to the inside of the vegetable compartment 5 can be prevented, and the inside of the vegetable compartment 5 does not become too cold.

Each of the vacuum heat insulating materials 24, 33, 36 and 39 has a rectangular shape and a plate shape.
According to this configuration, the vacuum heat insulating materials 24, 33, 36, 39 are rectangular, and the vacuum heat insulating materials 24, 33, 36, 39 do not need to be provided with cutouts or holes, and the required heat insulating performance can be obtained with a simple structure. Can be secured. Therefore, the manufacturing cost can be reduced, the assembly is simple, and the manufacturing efficiency is good.

According to the first embodiment, the cool air outlet 44 and the cool air return port 45 are formed on the inner wall of the back wall portion 31 of the vegetable compartment 5. One rectangular vacuum heat insulating material 39 arranged on the back wall portion 31 of the vegetable compartment 5 does not overlap the rear projection surfaces of the cold air outlet 44 and the cold air return port 45.
According to this configuration, the cold air outlet 44 and the cold air return port 45 can be formed at positions that are not separated by the rectangular vacuum heat insulating material 39. Therefore, since the cold air outlet 44 and the cold air return port 45 are formed, special processing such as making a hole in the vacuum heat insulating material 39 or providing a notch in the vacuum heat insulating material 39, or vacuum heat insulating There is no need to use multiple materials. Therefore, the manufacturing cost can be reduced, the assembly is simple, and the manufacturing efficiency is good.

According to the first embodiment, the single rectangular vacuum heat insulating material 39 arranged on the back wall portion 31 of the vegetable compartment 5 avoids the vertical projection region or the horizontal projection region of the cold air outlet 44 and the cold air return port 45. The vertical and horizontal sides are installed substantially parallel to the vertical and horizontal directions.
According to this configuration, one rectangular vacuum heat insulating material 39 fits the shape of the rectangular parallelepiped of the refrigerator 1, and it is possible to prevent the manufacturing operator from mistakenly arranging the vacuum heat insulating material 39, and the assembly is easy, Good manufacturing efficiency.

According to the first embodiment, the cold air blowout port 44 and the cold air return port 45 are located at diagonal corners of the inner wall of the vegetable compartment 5, respectively.
According to this configuration, the cold air outlet 44 and the cold air return port 45 can be formed at positions that are not separated by the rectangular vacuum heat insulating material 39. Further, the distance between the cool air outlet 44 and the cool air return port 45 can be separated, and the cool air blown out from the cool air outlet 44 and returned to the cool air return port 45 can be distributed throughout the vegetable compartment 5 to improve thermal efficiency.

According to the first embodiment, the cold air outlet 44 and the cold air return port 45 are located in the same range on the inner wall of the vegetable compartment 5 in the vertical direction or the horizontal direction.
According to this configuration, the cold air outlet 44 and the cold air return port 45 can be formed at positions that are not separated by the rectangular vacuum heat insulating material 39. In addition, the cold air outlet 44 and the cold air return port 45 are close to each other, and the area in the rear wall portion 31 of the vegetable compartment 5 in which one rectangular vacuum heat insulating material 39 is arranged can be increased.

According to the first embodiment, the refrigerator 1 includes electric components that adjust opening / closing of a plurality of air passages. The electrical components are stored in the back wall of another room above the vegetable room 5.
According to this structure, it is not necessary to provide an extra space behind the vegetable compartment 5, and the large-capacity vegetable compartment 5 is provided.

According to the first embodiment, the vegetable compartment 5 has the heat retaining heater 46 on any of the wall portions 20 that partition the vegetable compartment 5.
According to this structure, when the inside of the vegetable compartment 5 is too cold, the inside of the vegetable compartment 5 is warmed by the heat retention heater 46.

According to the first embodiment, the vegetable compartment 5 has a heat radiating pipe 47 that circulates the refrigerant used for the cooler 14 and radiates heat to any of the wall portions 20 that partition the vegetable compartment 5.
According to this configuration, when the inside of the vegetable compartment 5 is too cold, the inside of the vegetable compartment 5 is warmed by the refrigerant that circulates through the heat radiation pipe 47 to radiate heat.

According to the first embodiment, the storage room is the vegetable room 5. Other rooms around the storage room can be switched to a freezing room 6, an ice making room 3, a chilled room, a storage room at a temperature lower than the temperature zone of the vegetable room 5, or a temperature zone lower than the temperature zone of the vegetable room 5. This is a temperature switching chamber 4.
According to this configuration, cold heat may flow into the vegetable compartment 5 and the inside of the vegetable compartment 5 may be too cold. However, one rectangular vacuum heat insulating material 24, 33, 36, 39 is arranged on each wall portion 20 that divides the vegetable compartment 5. Thereby, the inflow of cold heat from the periphery of the vegetable compartment 5 to the inside of the vegetable compartment 5 can be prevented, and the inside of the vegetable compartment 5 does not become too cold. On the other hand, heat radiation from the inside of the vegetable compartment 5 to the surroundings of the refrigerator 1 outside the vegetable compartment 5 can be prevented, and the inside of the vegetable compartment 5 can be maintained at the set temperature with good thermal efficiency.

Embodiment 2.
Refrigerator 1 according to the second embodiment allows return cold air from refrigerating compartment 2 to flow into vegetable compartment 5 as compared with refrigerator 1 according to the first embodiment. Therefore, the return air passage of the cool air from the refrigerating compartment 2 and the return air passage of the vegetable compartment 5 merge at the lower rear side of the vegetable compartment 5, and the return air passage from the freezing compartment 6 is divided into left and right. After that, it is configured to return to the cooler chamber 27.
In the second embodiment, the characteristic part will be described. The other configuration is similar to that of the first embodiment, and therefore the description is omitted.

31: is a front view which shows the back surface wall part 31 seen from the vegetable compartment 5 of the refrigerator 1 which concerns on Embodiment 2 of this invention.
As shown in FIG. 31, in the vegetable compartment 5, a refrigeration return port 75 is formed in the upper right portion of the inner wall of the back wall portion 31 of the vegetable compartment 5. The refrigerating return port 75 does not overlap with the front projection surface of the rectangular and plate-shaped vacuum heat insulating material 39 arranged on the back wall portion 31 of the vegetable compartment 5 and is positioned outside the front projection surface. There is.
In the vegetable compartment 5, a refrigeration return air passage 76 is formed on the back surface of the inner wall of the back wall portion 31 of the vegetable compartment 5. The refrigeration return air passage 76 is formed from the upper right side of the inner wall of the back wall portion 31 of the vegetable compartment 5 where the refrigeration return opening 75 is formed to the cold air outlet 44 at the lower center of the inner wall of the back wall portion 31.
The cool air blowout port 44 is formed in a slender shape in the left and right direction at the lower center of the inner wall of the back wall portion 31. The cold air outlet 44 does not overlap with the front projection surface of the single rectangular plate-shaped vacuum heat insulating material 39 arranged on the rear wall portion 31 of the vegetable compartment 5 and is located outside the front projection surface. There is.
Since the cold air outlet 44 is formed behind the inner wall of the rear wall portion 31, one rectangular, plate-shaped vacuum heat insulating material 39 disposed rearward on the rear wall portion 31 of the vegetable compartment 5 is provided. May be blocked by.
The cool air outlet 44 may be provided with an opening amount adjusting mechanism as a cool air amount adjusting mechanism capable of adjusting the opening amount from both left and right sides as shown by an arrow in the figure.

  An unillustrated cold air return passage from the refrigerating compartment 2 is installed on the right side of the cooler 14 using a foamed heat insulating material so that necessary heat insulation can be performed. The return air path of the cool air from the refrigerating compartment 2 is an outer shell up to the outer shell below the ceiling wall portion 32 in the rear projection plane of the ceiling wall portion 32 of the vegetable compartment 5 between the temperature switching chamber 4 and the vegetable compartment 5. A guide portion is formed on the surface and extends. The cooling air return air passage from the refrigerating compartment 2 is an air passage formed in the bottom wall portion 35 of the vegetable compartment 5 between the vegetable compartment 5 and the freezing compartment 6 at a substantially central portion of the lower rear surface of the vegetable compartment 5. Connected to.

  The cool air that is blown by the blower 15 installed above the cooler 14 and that is generated by the cooler 14 passes through the air volume adjusting device 18a that is held in the foam insulation material above the cooler chamber 27. , Is supplied to the refrigerator compartment 2. The subsequent cool air is supplied from the cold air return port in the refrigerating compartment 2 to the refrigerating return port 75 formed in the back wall portion 31 of the vegetable compartment 5 through the return air passage. The cold air supplied to the refrigerating return port 75 is supplied to the refrigerating return air passage 76 formed in the rear wall portion 31 of the vegetable compartment 5, and is supplied from the cold air outlet 44 in the vegetable compartment 5 into the vegetable compartment 5. To be done. The cold air thereafter is supplied to a cold air return port 45 (not shown) in the vegetable compartment 5.

32: is a front view which shows the other example of the back wall part 31 seen from the vegetable compartment 5 of the refrigerator 1 which concerns on Embodiment 2 of this invention. FIG.
The refrigeration return air passage 76 arranged in the back wall portion 31 of the vegetable compartment 5 does not have a heat insulating function with the inside of the vegetable compartment 5, and is separated by the inner wall surface formed by injection molding.
Therefore, as shown in FIG. 32, in order to adjust the temperature in the vegetable compartment 5, a plurality of holes 77 may be provided on the inner wall surface separating the refrigeration return air passage 76 and the vegetable compartment 5.

33: is a front view which shows the other example of the back wall part 31 seen from the inside of the vegetable compartment 5 of the refrigerator 1 which concerns on Embodiment 2 of this invention.
As shown in FIG. 33, as in the configuration shown in FIG. 32, a plurality of holes 77 are provided in the inner wall surface separating the refrigeration return air passage 76 and the vegetable compartment 5 in order to adjust the temperature in the vegetable compartment 5. You may be taken.
A slider 78 that can freely open and close the plurality of holes 77 provided on the inner wall surface may be provided.
With such a configuration, the user can arbitrarily adjust the temperature in the vegetable compartment 5 by sliding the slider 78 as shown by an arrow to adjust the number of holes 77 to be closed.

  In the second embodiment, since the temperature can be adjusted in the vegetable compartment 5, a flow rate adjusting device for adjusting the amount of cold air supplied to the vegetable compartment 5 does not have to be provided in the air passage portion on the back surface of the refrigerator 1. good.

According to the second embodiment, the cold air outlet 44 is cooled by the cooler 14 that returns from another room that stores a stored product such as food at a temperature lower than that of the vegetable room 5 around the vegetable room 5. The low temperature cold air thus generated is blown into the vegetable compartment 5.
According to this configuration, it is not necessary to provide an air passage or an electric component for adjusting opening / closing of the air passage only for the vegetable compartment 5. Therefore, the manufacturing cost can be reduced, the assembly is easy, and the manufacturing efficiency is good.

According to the second embodiment, the vegetable compartment 5 has a cold air amount adjusting mechanism for adjusting the amount of cold air blown out from the cold air blowout port 44.
According to this structure, the temperature in the vegetable compartment 5 can be adjusted, and the stored foods, such as vegetables, can be preferably stored.

The first and second embodiments of the present invention may be combined or applied to other parts.
In addition, in the first and second embodiments of the present invention, the vacuum heat insulating materials 24, 33, 36 and 39 are rectangular and plate-shaped. However, it is not limited to this. The vacuum heat insulating materials 24, 33, 36, 39 may be formed in various shapes such as one having an R-shaped corner, a triangular shape, a polygonal shape, an elliptical shape, a circular shape and the like.

  1 refrigerator, 2 refrigerating room, 3 ice making room, 4 temperature switching room, 5 vegetable room, 6 freezing room, 7 refrigerant circuit, 8 compressor, 9 air cooling condenser, 10 condenser, 11 dew prevention pipe, 12 dryer, 13 decompression device, 14 cooler, 15 blower, 16a temperature sensor, 16b temperature sensor, 16c temperature sensor, 16d temperature sensor, 17 control board, 18a air volume adjusting device, 18b air volume adjusting device, 18c air volume adjusting device, 19 box body, 20 wall portion, 21 sheet metal, 22 inner box, 23 heat insulating material, 24 vacuum heat insulating material, 25 support, 26 spacer, 27 cooler chamber, 28 return air passage, 29 return air passage, 30 blowout air passage, 31 rear wall portion , 32 ceiling wall part, 33 vacuum heat insulating material, 34 urethane foam material, 35 bottom wall part, 36 vacuum heat insulating material, 37 urethane foam material, 38 heat insulating wall outer shell 39 vacuum heat insulating material, 40 foam heat insulating material, 41 blowout air passage, 42 heat insulating wall outline, 44 cold air blowout opening, 45 cold air return opening, 46 heat insulation heater, 47 heat radiating pipe, 48 flow path switching three-way valve, 49 outlet pipe, 50 Outlet pipe, 51 capillary tube, 52 stepping motor, 53 valve body, 54 magnetizing rotor, 55 center gear, 56 rotary gear, 57 rotary pad, 58 valve seat, 59 outer case, 60 floor plate, 61 orifice, 62 orifice, 63 orifice, 64 outlet orifice, 65 blowing air passage, 66 drip tray, 67 heater, 68 blowing air passage, 69 return air passage, 70 cold air blowing outlet, 71 ice making mechanism, 72 cold air returning outlet, 73 blowing air passage, 74 returning air passage, 75 refrigeration return port, 76 refrigeration return air passage, 77 holes, 78 slider.

Claims (17)

It is equipped with a storage room that is set to a higher temperature than other surrounding rooms and stores the stored items.
The storage compartment is provided with a vacuum heat insulating material on each of the walls that define the storage compartment ,
A cold air blowout port and a cold air return port are formed on the storage chamber inner wall of the back wall portion of the storage chamber,
The vacuum heat insulating material arranged on the back wall portion of the storage chamber does not overlap on the rear projection surface of the cold air outlet and the cold air return port,
The refrigerator in which the cold air outlet and the cold air return port are located at diagonal corners of the storage chamber inner wall . From the top, the refrigerator is laid out in the order of a refrigerating room, an ice making room and a temperature switching room, a vegetable room, and a freezing room,
The refrigerator according to claim 1, wherein the storage room is the vegetable room. The storage room is a vegetable room,
The other room is a freezing room, an ice making room, a chilled room, a storage room having a temperature lower than the temperature zone of the vegetable room, or a temperature switching room capable of switching to a temperature zone lower than the temperature zone of the vegetable room. The refrigerator according to claim 1 . The side wall portion of the storage compartment is provided with the vacuum heat insulating material over two side wall portions of the entire box of the refrigerator including other compartments.
Ceiling wall portion of the storage chamber, the bottom wall, the rear wall portion and Tobirakabe portion refrigerator according to each any one of the vacuum heat insulating material is disposed claims 1-3. A cooler is provided behind the storage room,
The refrigerator according to any one of claims 1 to 5 , wherein the back wall of the storage compartment has the vacuum heat insulating material disposed between the inner wall of the storage compartment and the cooler. The back wall portion of the storage chamber is provided with an air passage for cold air that communicates with the chamber from the cooler between the storage chamber inner wall and the cooler,
The refrigerator according to claim 5 , wherein the air passage is arranged on a front projection surface of the cooler. The vacuum heat insulating material disposed between the storage chamber inner wall and the cooler in the back wall portion of the storage chamber, the cooler and the air passage of the cooler and the air passage from the storage chamber. The refrigerator according to claim 6 , which has a size such that it is separated over a wider area than the front projection surface. A storage room that is set to a temperature higher than the surrounding other rooms and stores the stored goods,
A cooler provided behind the storage chamber,
A back wall portion provided between the storage chamber inner wall and the cooler;
A vacuum heat insulating material provided on the back wall portion ,
Equipped with
A cold air blowout port and a cold air return port are formed on the storage chamber inner wall of the back wall portion of the storage chamber,
The vacuum heat insulating material arranged on the back wall portion of the storage chamber does not overlap on the rear projection surface of the cold air outlet and the cold air return port,
The refrigerator in which the cold air outlet and the cold air return port are located at diagonal corners of the storage chamber inner wall. The storage room is a vegetable room,
The other room is a freezing room, an ice making room, a chilled room, a storage room having a temperature lower than the temperature zone of the vegetable room, or a temperature switching room capable of switching to a temperature zone lower than the temperature zone of the vegetable room. The refrigerator according to claim 8 . The refrigerator according to claim 8 or 9 , wherein a vacuum heat insulating material is arranged on a wall portion that separates the storage room from the other room around the storage room. The vacuum heat insulating material, a refrigerator according to any one of claims 1 to 10 which is a plate-shaped by a single rectangle. The vacuum heat insulating material arranged on the back wall portion of the storage chamber has vertical and horizontal sides that are substantially parallel to the vertical direction and the horizontal direction while avoiding the vertical projection region or the horizontal projection region of the cold air outlet and the cold air return port. The refrigerator according to any one of claims 1 to 11, which is installed so as to be. Equipped with electrical parts that adjust the opening and closing of multiple air passages,
The refrigerator according to any one of claims 5 to 12 , wherein the electric component is stored in a back wall portion of another room above the storage room. The refrigerator according to any one of claims 1 to 14 , wherein the storage chamber has a heat insulation heater on any wall portion that divides the storage chamber. The refrigerator according to any one of claims 4 to 14 , wherein the storage chamber has a heat dissipation pipe that radiates the refrigerant used in the cooler to radiate heat in any of the wall sections that partition the storage chamber. The cold air outlet blows out cool air returned from another room that stores a stored material at a temperature lower than that of the storage room around the storage room, or low temperature cold air cooled by the cooler into the storage room. The refrigerator according to any one of claims 1 to 15 . The refrigerator according to claim 16 , wherein the storage chamber has a cold air amount adjusting mechanism that adjusts an amount of cold air blown out from the cold air blowout port.

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