JP7550377B2 - refrigerator - Google Patents

Description

The present invention relates to a refrigerator.

Conventionally, there is known a refrigerator having a plurality of compartments, a storage compartment that is set to a higher temperature than the other compartments, a cooler arranged at the rear of the storage compartment, and a rear wall structure that covers the cooler to form a cooling compartment and forms a rear wall of the storage compartment (Patent Document 1).
The refrigerator of Patent Document 1 has an outlet port to a storage compartment on the front surface of the rear wall structure, from which cool air is blown directly toward the storage compartment.

International Publication No. 2018/131157

However, when cold air is blown directly into the storage chamber, as in Patent Document 1, there is an issue that it is difficult to control the temperature of the storage chamber.

In view of the above problems, the present invention aims to provide a refrigerator that allows easy temperature control of the storage compartment.

In order to achieve the above-mentioned object, the present invention comprises a vegetable compartment that is set to a higher temperature than other compartments, a cooler that is arranged on the rear of the vegetable compartment , and a rear wall structure that covers the cooler to form a cooling compartment and forms the rear wall of the vegetable compartment , wherein the rear wall structure is provided with vacuum insulation material on the rear surface of a front cover of the rear wall structure so as to cover almost the entire rear surface, and the rear wall structure is provided with an air duct to the vegetable compartment, with an exhaust port opening toward the side wall of the vegetable compartment , rear of the vacuum insulation material.

The present invention provides a refrigerator that allows easy temperature control of the storage compartment.

External perspective view of a refrigerator Schematic diagram showing the air duct configuration of a refrigerator 1A is a front view of the rear wall structure, FIG. 1B is a cross-sectional view taken along line A-A in FIG. 1A, and FIG. 1C is a cross-sectional view taken along line B-B in FIG. 1A. IV-IV line cross-sectional view of FIG. Exploded perspective view of the rear wall structure 3A is a cross-sectional view taken along line VI-VI in FIG. 3A, (B) is a cross-sectional view taken along line CC in FIG. 3A, and (C) is a cross-sectional view taken along line DD in FIG. Cross-section of the storage room

The first invention comprises a storage chamber which is set to a higher temperature than other chambers, a cooler arranged on the rear side of the storage chamber, and a rear wall structure which covers the cooler to form a cooling chamber and forms a rear wall of the storage chamber, the rear wall structure having an air passage leading to the storage chamber with an exhaust port opening toward the side wall of the storage chamber.
With this, the cooling air passing through the air duct to the storage chamber is discharged from an outlet that opens toward the side wall of the storage chamber, collides with the side wall of the storage chamber, flows along the side wall, and returns to the storage chamber, making it easier to control the temperature inside the storage chamber compared to when the cooling air is blown directly into the storage chamber.

In a second aspect of the present invention, a storage chamber damper for adjusting the amount of air flow is disposed in the outgoing air passage to the storage chamber.
According to this, the air volume is adjusted by the storage chamber damper, so that it becomes easier to control the temperature inside the storage chamber.

In a third aspect of the present invention, the storage chamber damper is disposed in another chamber below the storage chamber.
With this, the cooling air sent from the cooling chamber of the back wall structure passes through an air passage in the storage chamber damper located in another chamber below the storage chamber before returning to the storage chamber. As a result, the total length of the air passage going to the storage chamber is longer, making it easier to control the temperature inside the storage chamber compared to the case of a shorter air passage.

In a fourth aspect of the present invention, the storage chamber damper is disposed in a lower insulating partition wall that partitions the lower part of the storage chamber.
With this, the cooling air sent from the cooling chamber of the back wall structure passes through an air passage in the storage chamber damper located in another chamber below the storage chamber before returning to the storage chamber. As a result, the total length of the air passage going to the storage chamber is longer, making it easier to control the temperature inside the storage chamber compared to the case of a shorter air passage.

In a fifth invention, the rear wall structure has a return air passage from the storage chamber, the storage chamber has a storage chamber return duct communicating with the return air passage, the storage chamber return duct extends forward along the top surface of the storage chamber and has a cold air intake port at its front end.
In a sixth aspect of the present invention, the cool air intake port is disposed near a side wall of the storage chamber opposite to the side wall toward which the discharge port faces.
With this, the cooling air from the outlet flows along the side wall of the storage chamber, circulates through the storage chamber, and is sucked in through the cool air inlet, making it easy to control the temperature inside the storage chamber.

In a seventh aspect of the present invention, the storage compartment is a vegetable compartment.
This makes it easier to control the temperature inside the vegetable compartment.

FIG. 1 is a perspective view of the exterior of a refrigerator.
The refrigerator according to this embodiment includes a refrigerator body 1 having an opening at the front, and within this refrigerator body 1, a plurality of rooms are formed as insulated compartments.
The compartments formed within refrigerator body 1 are composed of refrigerator compartment 14 at the top, ice-making compartment 16 provided below refrigerator compartment 14, switchable compartment 15 provided beside it, vegetable compartment (storage compartment) 17 provided below switchable compartment 15 and ice-making compartment 16, and freezer compartment 18 provided below vegetable compartment 17. Refrigerator compartment 14 is provided with a plurality of shelves (not shown), and a partial compartment (not shown) is provided at the bottom. Each of compartments 14 to 18 can be opened and closed freely by a pivoting door 7 or drawer-type doors 8, 9, 10, 11 that employ the same thermal insulation structure as refrigerator body 1.
The vegetable compartment 17 constitutes a storage compartment, and the refrigerator compartment 14, the switching compartment 15, the ice-making compartment 16, and the freezer compartment 18 constitute the other compartments.

The refrigerator compartment 14 is a room for storing food in a refrigerated state, and is cooled to a low temperature that does not freeze, specifically, typically set to 1 to 5° C. The partial compartment 22 provided within the refrigerator compartment 14 is cooled to a temperature set to about −3° C., which is lower than the temperature of the refrigerator compartment 14.
The switching chamber 15 is capable of switching the cooling temperature over a wide range, for example, from a freezing temperature range in which the temperature is set to -22 to -18°C to a refrigerated temperature range in which the temperature is set to 1 to 5°C.

The vegetable compartment 17 is a compartment whose temperature is set equal to or slightly higher than that of the refrigerator compartment 14, specifically, it is cooled to a temperature set to 2 to 7°C.
This vegetable compartment 17 becomes highly humid due to moisture given off by the stored food, such as vegetables, and condensation may occur if the compartment becomes too cold locally.
Therefore, by setting a relatively high temperature, the amount of cooling is reduced, preventing condensation due to localized excessive cooling.

The freezer compartment 18 is a compartment that is set to a freezing temperature range. Specifically, it is usually cooled to a temperature between -22 and -18°C, but to improve the frozen storage conditions, it is cooled to a lower temperature, such as -30°C or -25°C.

FIG. 2 is a diagram showing the inside of a refrigerator.
Refrigerator body 1 is composed of a metal outer box 2, an inner box 3 made of hard resin, and foam insulation material 4 foam-filled between the outer box 2 and the inner box 3. Inside inner box 3 of refrigerator body 1, refrigerator chamber 14 at the top and switching chamber 15 and ice-making chamber 16 below are formed as insulated compartments by a first central insulating partition wall 5, and switching chamber 15 and ice-making chamber 16 are also formed as insulated compartments by a fourth insulating partition wall 5A extending vertically.

The second insulating partition wall 6 forms an insulated compartment between the switching chamber 15 and the ice-making chamber 16 and the vegetable chamber 17 located below them, and the third insulating partition wall (lower insulating partition wall) 70 forms an insulated compartment between the vegetable chamber 17 and the freezer chamber 18 located below it.

A cooler 24 for generating cool air is disposed at the rear of the vegetable compartment 17.
The cooler 24 is connected to a cooling unit 124 (see FIG. 1) to form a refrigeration cycle. The cooling unit 124 in FIG. 1 includes a compressor (not shown), a condenser (not shown), a heat dissipation pipe (not shown), and a capillary tube (not shown). Cooling is performed by circulating the refrigerant compressed by the compressor (not shown).

3A is a front view of the rear wall structure, FIG. 3B is a cross-sectional view taken along line AA in (A), and FIG. 3C is a cross-sectional view taken along line BB in (A).
FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.
As shown in Fig. 3(A), the vegetable compartment 17 is disposed in the center in the height direction of the refrigerator body 1 (see Fig. 1), and a rear wall structure 20 forming a rear wall of the vegetable compartment 17 is provided at the back of the vegetable compartment 17. As shown in Fig. 4, the rear wall structure 20 is attached to the inner box 3 of the refrigerator body 1. The rear wall structure 20 covers the cooler 24 to form a cooling chamber 224. That is, the cooling chamber 224 is formed between the rear wall structure 20 and the inner box 3, and the cooler 24 is disposed in the cooling chamber 224. Reference numeral 26 denotes a defrost heater.

FIG. 5 is an exploded perspective view of the rear wall structure.
The rear wall structure 20 is configured by sequentially stacking a front cover 201, a heater 202, a protective sheet 203, a vacuum insulation material 204, a first intermediate cover 205, a molded insulation material 206, a second intermediate cover 207, a third intermediate cover 208, and a rear cover 209. An opening 209A is provided at an upper portion of the rear cover 209, and a fan 25 is disposed in the opening 209A. A cooling chamber 224 is formed between the rear surface of the rear cover 209 and the inner box 3 (see FIG. 2 ) of the refrigerator body 1.

The front cover 201 is made of hard resin and forms the front of the rear wall structure 20. The front cover 201 has a cover portion 212 integrally formed at the upper portion. The cover portion 212 extends into the switching chamber 15 and the ice making chamber 16 (see FIG. 3(A)) and forms the rear wall of each chamber 15, 16. The front cover 201 is formed at an angle at the lower portion of the cover portion 212 so that the bottom is positioned further forward than the top. The cover portion 212 is formed approximately vertically.

The heater 202 is attached to the back surface of the front cover 201. The heater 202 is formed so as to cover almost the entire back surface of the front cover 201. The heater 202 is a plate-shaped member with aluminum foil attached, and is attached to the back surface of the front cover 201 with double-sided tape or the like. The heater 202 has a serpentine heating wire 202A, and the heating wire 202A is provided in the lower region of the heater 202.

Although not shown in the figure, the vacuum insulation material 204 is constructed by covering a plate-shaped core material with an outer covering material and sealing the inside under reduced pressure. The vacuum insulation material 204 is plate-shaped and fits into a rib (not shown) on the back surface of the front cover 201, sandwiching the heater 202 and covering almost the entire back surface of the front cover 201.

The outer covering material of the vacuum insulation material 204 may be any material that can prevent outside air from entering the inside and has flexibility. The outer covering material may be a laminate of a heat-sealing film, a gas barrier film as an intermediate layer, and a surface protection film as the outermost layer. The heat-sealing film may be a low-density polyethylene film.
The core material of the vacuum insulation material 204 is a laminate of chopped strand mats with a thickness of 0.5 mm, and the thickness in a reduced pressure state is, for example, 8 mm to 12 mm. The core material is not limited to chopped strand mats, and may be any material that has heat insulating properties and flexibility. Specific examples include known materials such as fiber materials and foam materials.

The protective sheet 203 is a plate-shaped member that is placed between the heater 202 and the vacuum insulation material 204. The protective sheet 203 protects the vacuum insulation material 204 so that the outer covering material of the vacuum insulation material 204 does not tear.

The first intermediate cover 205 extends in the vertical direction and is attached in contact with the rear surface of the vacuum insulation material 204. The molded insulation material 206 is made of a resin with insulating properties. The second intermediate cover 207 is sandwiched between the molded insulation material 206 and the rear cover 209, and the third intermediate cover 208 is arranged side by side with the rear cover 209.

As shown in FIG. 2, the rear wall structure 20 is provided with outward air passages 14A-18A leading from the central cooling chamber 224 to each of the chambers 14-18, i.e., the refrigerator chamber 14, ice-making chamber 16, switching chamber 15, vegetable chamber 17, and freezer chamber 18. The rear wall structure 20 is also provided with return air passages 14B-18B leading from each of the chambers 14-18, i.e., the refrigerator chamber 14, ice-making chamber 16, switching chamber 15, vegetable chamber 17, and freezer chamber 18, to the cooling chamber 224.

2, the outflow air passages 14A to 18A are air passages for supplying air cooled by the cooler 24 to each of the chambers 14 to 18 via the fan 25. The cooler 24 is disposed in the cooling chamber 224 behind the rear cover 209 in FIG.
3(B) and 3(C), cooling air from cooling chamber 224 flows through fan 25 as indicated by solid arrows, and enters communication passage 301. Communication passage 301 is formed between second intermediate cover 207 and rear cover 209. Communication passage 301 is connected to each of outflow air passages 14A to 18A.

As shown by solid arrows in FIG. 2, the cooling air that has passed through the communication passage 301 is distributed to each of the air passages, namely, the upward air passage 14A to the refrigerator compartment 14, the air passage 15A to the switching compartment 15, the air passage 16A to the ice making compartment 16, the air passage 17A to the vegetable compartment 17, and the air passage 18A to the freezer compartment 18, and is supplied to each of the compartments 14 to 18. In FIG. 3(B), the cooling air that has passed through the communication passage 301 flows upward and is supplied to the refrigerator compartment 14, and flows downward and is supplied to the freezer compartment 18. Also, in FIG. 3(C), the cooling air that has passed through the communication passage 301 flows upward and is supplied to the ice making compartment 16, and a part of the cooling cold air that flows downward and is supplied to the freezer compartment 18 is branched at an opening opened in the third insulating partition wall 70 and is supplied to the vegetable compartment 17.

Dampers (not shown) for adjusting the amount of airflow are disposed in the outgoing air passages 14A, 15A, 17A to the refrigerator compartment 14, the switchable compartment 15, and the vegetable compartment 17, respectively.
The outflow air passage 14A communicates with the inside of a duct 14C provided on the rear surface of the refrigerator compartment 14, and communicates with the refrigerator compartment 14 via exhaust ports 14D and 14E opening forward.

The air returning from each of the chambers 14 to 18 flows through the return air passages 14B to 18B toward the cooler 24 disposed in the cooling chamber 224, as indicated by the dashed arrows in FIG.
2, return air passage 14B from refrigerator compartment 14 is disposed extending vertically on the right side of the figure, with its upper end communicating with the lower part of refrigerator compartment 14 and its lower end directed toward cooler 24 of cooling compartment 224. As shown in FIG. 4, return air passage 14B is disposed side by side with cooler 24 on the right side of the figure, and is formed between third intermediate cover 208 and inner box 3.

The return air passage 15B from the switching chamber 15 is arranged to extend vertically on the right side of the figure as shown in FIG. 2, with the upper end opening 15C communicating with the lower part of the switching chamber 15 and the lower end facing the cooler 24 of the cooling chamber 224. This return air passage 15B is formed on the right side of the figure between the molded insulation material 206 and the third intermediate cover 208 as shown in FIG. 4.

The return air passage 16B from the ice-making chamber 16 is arranged to extend vertically on the left side of the drawing as shown in FIG. 2, with the upper end opening 16C communicating with the lower part of the ice-making chamber 16 and the lower end facing the cooler 24 of the cooling chamber 224. This return air passage 16B is formed on the left side of the drawing between the first intermediate cover 205 and the molded insulation material 206 as shown in FIG. 4.

As shown in FIG. 2, the return air passage 17B from the vegetable compartment 17 is arranged to extend vertically from the right end of the figure, with the upper end opening 17C communicating with the upper part of the vegetable compartment 17 and the lower end facing the cooler 24 of the cooling compartment 224. As shown in FIG. 4, this return air passage 17B is arranged side by side on the outside of the return air passage 15B from the switching compartment 15 at the right end of the figure, and is formed between the molded insulation material 206 and the third intermediate cover 208.

As shown in FIG. 2, the return air passage 18B from the freezer compartment 18 passes through the third insulating partition wall 70, which forms an insulating compartment between the freezer compartment 18 and the vegetable compartment 17.

As shown in Figures 3(B) and 3(C), a drain pan 303 for receiving condensation water is disposed below the cooler 24, and the drain pan 303 is covered with foam insulation material 305. The bottom of the drain pan 303 is provided with a drain outlet, to which a drain hose (not shown) is connected. A defrost heater 26 is disposed inside the drain pan 303.

A guide member 307 for guiding drain is disposed on rear cover 209 that contacts cooler 24. In Fig. 3(B), guide member 307 extends downward within return air duct 18B from freezer compartment 18, and is directed toward drain pan 303 of cooler 24. In Fig. 3(C), guide member 307 extends downward within return air duct 16B from ice making compartment 16, and is directed toward drain pan 303 of cooler 24. Reference numeral 309 denotes a bypass passage.
That is, the guide members 307 extend downward within the respective return air passages 14 B to 18 B and are directed toward the inside of the drain pan 303 .

Fig. 6(A) is a cross-sectional view taken along line VI-VI in Fig. 3(A) at a location corresponding to the lower portion of the vegetable compartment 17. Fig. 6(B) is a cross-sectional view taken along line CC in Fig. 6(A). Fig. 6(C) is a cross-sectional view taken along line D-D in Fig. 6(A).
In Fig. 3(C) above, the cooling air that has passed through communication passage 301 flows downward and is supplied to vegetable compartment 17. Figs. 6(B) and 6(C) show outgoing air passage 17A to vegetable compartment 17 and return air passage 16B from ice making compartment 16.

As shown in Figure 2, the outgoing air passage 17A to the vegetable compartment 17 and the return air passage 16B from the ice-making compartment 16 are formed by opening a portion of the third insulated partition wall 70, with the outgoing air passage 17A being formed spanning the lower part of the vegetable compartment 17 and the upper part of the freezer compartment 18, and the return air passage 16B from the ice-making compartment 16 being formed between the lower part of the vegetable compartment 17 and within the third insulated partition wall 70.
As shown in Fig. 6(C), a vegetable compartment damper (storage compartment damper) 320 for adjusting air volume is disposed in the third insulating partition wall 70, protruding into the freezer compartment 18 below the vegetable compartment 17. The vegetable compartment damper 320 is disposed in the area of the freezer compartment 18. The vegetable compartment damper 320 includes a partition wall 321 and a substantially U-shaped air passage 322 formed to wrap around the lower end of the partition wall 321. A damper plate 323 is disposed in the air passage 322.

As shown in FIG. 6(C), one end of the air passage 322 is connected to the inlet air passage 17A-1, which is formed by opening a portion of the third insulating partition wall 70 and is substantially S-shaped, and the inlet air passage 17A-1 is connected to the communication passage 301.

The other end of the air passage 322 is connected to a generally I-shaped outlet air passage 17A-2 that penetrates the third insulating partition wall 70 from top to bottom, and the outlet air passage 17A-2 extends upward inside the rear wall structure 20 and connects to an outlet 17A-3 that opens into the side wall of the rear wall structure 20. The outlet 17A-3 faces the inner box 3 that forms the side wall of the vegetable compartment 17.

As shown in FIG. 6B, the air returning from the ice-making chamber 16 passes through the lower return air passage 16B-1, which is formed into a roughly U-shape by recessing a portion of the third insulating partition wall 70, toward the cooler 24. A protruding wall 327 is provided within the lower return air passage 16B, and the roughly U-shaped lower return air passage 16B-1 is formed by the protruding wall 327.

FIG. 7 is a cross-sectional view of the vegetable compartment 17.
A lower case 117 and an upper case 118 are arranged in the vegetable compartment 17. Reference numeral 119 denotes a bottle storage section. The upper case 118 has a rear end 118A, which abuts against a seal member 120 when the upper case 118 is stored, thereby closing the gap between the rear end 118A and the rear wall structure 20. The seal member 120 is attached to a front cover 201 of the rear wall structure 20. A groove (not shown) extending laterally is formed in the front cover 201, and the seal member 120 is attached within this groove.

The upper case 118 has a front end 118B, which contacts the seal member 121 when the upper case 118 is stored, sealing the gap between the front end 118B and the second insulating partition wall 6. The seal member 121 is attached to the second insulating partition wall 6.

A vegetable compartment return duct (storage compartment return duct) 123 is disposed on the underside of the second heat-insulating partition wall 6 (the top surface of the vegetable compartment 17). The vegetable compartment return duct 123 communicates with an upper end opening 17C of the return air passage 17B from the vegetable compartment 17. The vegetable compartment return duct 123 extends forward within the top surface of the vegetable compartment 17, and a cold air intake port 125 is formed at its front end. The cold air intake port 125 is formed forward of the front end portion 118B of the upper case 118.
As shown in FIG. 2, the return air passage 17B from the vegetable compartment 17 is disposed at the right end of the figure, and the outgoing air passage 17A to the vegetable compartment 17 is disposed at the left end of the figure.

The cold air intake 125 (see FIG. 7) connected to the return air duct 17B opens into the upper part of the inner wall 3 at the right end in the figure, and the discharge outlet 17A-3 (see FIG. 6(C)) connected to the outward air duct 17A opens into the lower part of the inner wall 3 at the left end in the figure. The cold air intake 125 is located near the side wall opposite the side wall of the vegetable compartment 17 toward which the discharge outlet 17A-3 faces.

In this embodiment, the rear wall structure 20 has an outgoing air duct 17A to the vegetable compartment 17, which opens toward the side wall of the vegetable compartment 17, and cooling air passing through the outgoing air duct 17A is discharged from the outlet 17A-3 toward the side wall of the vegetable compartment 17.
Therefore, the cooled air from the outlet 17A-3 flows along the side wall of the vegetable compartment 17 and returns to the vegetable compartment 17, making it easier to control the temperature inside the vegetable compartment 17 compared to when the cooled air is blown directly into the vegetable compartment 17.

In this embodiment, a vegetable compartment damper 320 for adjusting the air volume is arranged in the outgoing air passage 17A to the vegetable compartment 17.
Therefore, temperature control inside the vegetable compartment 17 becomes easier.

In this embodiment, a vegetable compartment damper 320 for adjusting air volume is disposed in the freezer compartment 18 below the vegetable compartment 17 .
Therefore, the cooling air sent from the cooling chamber 224 of the rear wall structure 20 passes through the air passage 322 in the vegetable chamber damper 320 before returning to the vegetable chamber 17, and as a result, the overall length of the air passage 17A going to the vegetable chamber 17 is longer, making it easier to control the temperature inside the vegetable chamber 17 compared to the case of a shorter air passage.

In this embodiment, the vegetable compartment damper 320 is arranged in the third insulating partition wall (lower insulating partition wall) 70 that separates the lower part of the vegetable compartment 17 .
Therefore, the cooling air sent from the cooling chamber 224 of the rear wall structure 20 passes through the air passage 322 in the vegetable chamber damper 320 before returning to the vegetable chamber 17, and as a result, the overall length of the air passage 17A going to the vegetable chamber 17 is longer, making it easier to control the temperature inside the vegetable chamber 17 compared to the case of a shorter air passage.

In this embodiment, the vegetable compartment 17 is provided with a vegetable compartment return duct 123 that communicates with the return air duct 17B from the vegetable compartment 17, and the vegetable compartment return duct 123 extends forward along the top surface of the vegetable compartment 17 and has a cold air intake port 125 at its front end.
The cold air intake port 125 is disposed near the side wall opposite the side wall of the vegetable compartment 17, toward which the exhaust port 17A-3 connected to the outgoing air passage 17A faces.

The cooled air from the outlet 17A-3 therefore flows along the side wall of the vegetable compartment 17, circulates through the vegetable compartment 17, and is sucked in through the cold air intake 125, making it easy to control the temperature inside the vegetable compartment 17.

The above-described embodiments are merely examples of the present invention, and may be modified and applied as desired without departing from the spirit and scope of the present invention.

As described above, the refrigerator according to the present invention can be suitably used in refrigerators with a back wall structure that places a cooler in a storage compartment that is set to a higher temperature than other compartments and covers the cooler to form a cooling compartment at the back of the storage compartment.

1 Refrigerator body 3 Inner box 14 Refrigerator compartment 15 Switching compartment 16 Ice compartment 17 Vegetable compartment (storage compartment)
17A-3 Air outlet 18 Freezer compartment 14A-18A Forward air duct 14B-18B Return air duct 20 Back wall structure 24 Cooler 26 Defrost heater 123 Vegetable compartment (storage compartment) return duct 125 Cold air intake 201 Front cover 202 Heater 202A Heating wire 203 Protective sheet 204 Vacuum insulation material 205 First intermediate cover 206 Molded insulation material 207 Second intermediate cover 208 Third intermediate cover 209 Rear cover 224 Cooling compartment 303 Drain pan 307 Guide member 320 Vegetable compartment (storage compartment) damper

Claims (6)

A vegetable compartment that is set to a higher temperature than other compartments;
A cooler disposed at the back of the vegetable compartment;
A back wall structure that covers the cooler to form a cooling chamber and forms a back wall of the vegetable chamber;
Equipped with
The rear wall structure includes a vacuum insulation material on a rear surface of the front cover of the rear wall structure so as to cover substantially the entire rear surface,
The rear wall structure is provided with an air passage leading to the vegetable compartment, the air outlet of which opens toward a side wall of the vegetable compartment behind the vacuum insulation material. The refrigerator according to claim 1, in which a vegetable compartment damper for adjusting the air volume is disposed in the air duct leading to the vegetable compartment. The refrigerator according to claim 2, wherein the vegetable compartment damper is disposed in another compartment below the vegetable compartment. The refrigerator according to claim 2 , wherein the vegetable compartment damper is arranged in a lower insulating partition wall that separates a lower portion of the vegetable compartment. The rear wall structure includes a return air duct from the vegetable compartment,
5. The refrigerator according to claim 1, wherein the vegetable compartment is provided with a vegetable compartment return duct communicating with the return air duct, the vegetable compartment return duct extending forward along a top surface of the vegetable compartment and having a cold air intake port at a front end. The refrigerator according to claim 5, wherein the cold air intake is disposed near the side wall opposite the side wall of the vegetable compartment to which the discharge port faces.

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