JP2020118362A - refrigerator - Google Patents

Abstract

To provide a refrigerator capable of suppressing a backflow of cool air while reducing air passage capacity.SOLUTION: A refrigerator includes: an ice making chamber 3 and an upper stage freezing chamber 4 which are at the lower stage of a refrigeration chamber 2; a first switching chamber 5 provided at the lower stage of the ice making chamber 3 and the upper stage freezing chamber 4 and capable of switching from a refrigeration temperature zone to a freezing temperature zone; an evaporator EV1 for cooling the ice making chamber 3, the upper stage freezing chamber 4 and the first switching chamber 5; a return air passage 12d for returning to the evaporator EV1 from the ice making chamber 3 and the upper stage freezing chamber 4; a direct cooling discharge port DP1 and an indirect cooling discharge port DP2 for discharging the cool air from the evaporator EV1 to the first switching chamber 5; a first return port RP1 and a second return port RP2 to which the cool air which has cooled the first switching chamber 5 returns; and a confluence point P for merging the cool air from the first return port RP1 and the second return port RP2 to the return air passage 12d. The first return port RP1 opens on the front surface side, and the second return port RP2 opens on the side surface side.SELECTED DRAWING: Figure 12

Description

The present invention relates to a refrigerator.

Patent Document 1 describes a refrigerator in which cold air generated by a cooler is supplied to each storage chamber, and an air passage for returning the cool air thereafter to the cooler from a return port provided in each storage chamber is individually provided. ing.

JP, 2000-356459, A

By the way, if the storage chamber is a switching chamber that can switch between the refrigerating temperature zone and the freezing temperature zone, it is necessary to increase the opening area of the cold air discharge port corresponding to the freezing temperature zone, and accordingly, the cold air return port It is also necessary to increase the opening area. If the opening area of the return port is increased in this way, cold air may flow backward. Further, in the refrigerator as described in Patent Document 1, when the switching chamber as described above is provided, the backflow of cold air is less likely to occur, but the air passage volume increases and the internal volume decreases.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a refrigerator capable of suppressing the backflow of cold air while reducing the volume of the air passage.

The present invention, a freezing room in the lower stage of the refrigerating room, a switching chamber provided in the lower stage of the freezing room, which can be switched from the refrigerating temperature zone to the freezing temperature zone, and a cooler for cooling the freezing room and the switching chamber, The duct returning from the freezer to the cooler, the discharge port for discharging the cool air from the cooler into the switching chamber, the return port for returning the cool air that has cooled the switching chamber, and the cool air from the return port A merging portion for merging with the duct, and the return port has a first return port opening to the front side and a second return port opening to the side surface side.

According to the present invention, it is possible to provide a refrigerator capable of suppressing the backflow of cold air while reducing the volume of the air passage.

It is a front view which shows the refrigerator which concerns on this embodiment. It is the sectional view on the AA line of FIG. It is a front view which shows the inside of the refrigerator of this embodiment. It is a schematic diagram which shows the arrangement of a discharge port and a return port. It is an exploded perspective view when the heat insulation partition wall of the back of a switching room is seen from the front side. It is a disassembled perspective view when the heat insulation partition wall of the switching chamber back is seen from the back side. It is a perspective view which shows the damper for direct cooling of a 1st switching chamber. It is a perspective view which shows the damper for direct cooling of a 2nd switching chamber. It is a perspective view which shows the damper for indirect cooling. It is a perspective view showing arrangement of a heater provided in a panel body. It is a perspective view showing arrangement of a heater provided in a panel cover. It is a figure explaining the flow of cold air. It is a schematic diagram which shows an air duct structure. It is an exploded perspective view showing the structure which controls the cool air leak of a damper. It is sectional drawing which shows the structure which suppresses the cold air leak of a damper.

Hereinafter, a mode for carrying out the present invention (this embodiment) will be described. However, the present embodiment is not limited to the following contents, and can be implemented by being arbitrarily modified within a range not impairing the gist of the present invention. Moreover, below, it demonstrates on the basis of the direction shown in FIG.

(First embodiment)
FIG. 1 is a front view showing the refrigerator according to the first embodiment.
As shown in FIG. 1, the refrigerator 1 has a box body 10 and includes a refrigerating room 2 from above, an ice making room 3 (freezing room) and an upper stage freezing room 4 (freezing room) provided on the left and right, and a first switching room 5 (switching room) and the second switching room 6 (switching room) have storage rooms in this order.

The refrigerator 1 also includes a door that opens and closes the opening of each storage chamber. These doors are divided into left and right rotary refrigerating compartment doors 2a and 2b that open and close the opening of the refrigerating compartment 2, an ice making compartment 3, an upper freezing compartment 4, a first switching compartment 5, and a second switching compartment 6 Is a drawer type ice making chamber door 3a, a freezing chamber door 4a, a first switching chamber door 5a, and a second switching chamber door 6a. The inner material of the plurality of doors is mainly made of urethane.

The refrigerating compartment 2 is a refrigerating/storage compartment in which the inside of the refrigerating compartment is in a refrigerating temperature zone (0° C. or higher), for example, about 4° C. on average. The ice making chamber 3 and the upper freezing chamber 4 are frozen storage chambers in which the inside of the freezing temperature zone (less than 0° C.) is, for example, about −18° C. on average.

The first switching chamber 5 and the second switching chamber 6 are switching storage chambers that can be set in a freezing temperature zone or a refrigerating temperature zone, for example, a refrigerating mode that averages about 4°C and an average of about -20°C. You can switch to the freezing mode. In addition, in the refrigerator 1 of the present embodiment, a strong refrigerating mode or a weak refrigerating mode having a temperature between the refrigerating mode and the freezing mode, a weak refrigerating mode in which the temperature is higher than the refrigerating mode, and a temperature in lower than the refrigerating mode are further strengthened. A plurality of operation modes such as a freezing mode are provided, and these operation modes can be selected by operating the operation unit 200.

FIG. 2 is a sectional view taken along the line AA of FIG. Note that, in FIG. 2, a cold air discharge port (direct cooling discharge port DP1) is illustrated in the first switching chamber 5, and a cool air return port (return port RP3) is illustrated in the second switching chamber 6.
As shown in FIG. 2, the refrigerator 1 includes a box body 10 formed by filling a foam insulation material (for example, urethane foam) between an outer box 10a made of a steel plate and an inner box 10b made of a synthetic resin. The outside and the inside are separated from each other. In addition to the foam heat insulating material, a vacuum heat insulating material having a relatively low thermal conductivity is mounted on the box body 10 between the outer box 10a and the inner box 10b. As a result, the heat insulation performance is improved without reducing the food storage volume. Here, the vacuum heat insulating material is configured by wrapping a core material such as glass wool or urethane with an outer wrapping material. The outer packaging material includes a metal layer (for example, aluminum) in order to ensure gas barrier properties. Further, in terms of manufacturability, each surface shape of the vacuum heat insulating material is generally flat.

In the refrigerator 1, the vacuum heat insulating material 25f is provided on the back of the box body 10, the vacuum heat insulating material 25g is provided on the upper and lower portions of the box body 10, and the vacuum heat insulating material (not shown) is provided on both sides of the box body 10. ), the heat insulation performance of the refrigerator 1 is improved.

Further, in the refrigerator 1, the heat insulation performance of the refrigerator 1 is improved by providing the vacuum heat insulating materials 25d and 25e on the first switching chamber door 5a and the second switching chamber door 6a. In such a heat insulating structure, the first switching chamber 5 and the second switching chamber 6 are set in the freezing mode, and the temperature difference between the outside and the first switching chamber 5 and the second switching chamber 6 is large, and the amount of heat entering from the outside air is large. When there are many, the energy saving performance can be greatly improved.

In the refrigerator 1, the refrigerating compartment 2, the ice making compartment 3 and the upper freezing compartment 4 are separated by a heat insulating partition wall 28. In the refrigerator 1, the ice making chamber 3 and the upper freezing chamber 4 are separated from the first switching chamber 5 by a heat insulating partition wall 29. In the refrigerator 1, the first switching chamber 5 and the second switching chamber 6 are separated by the heat insulating partition wall 30. In the refrigerator 1 of the present embodiment, the heat insulating performance of the refrigerator 1 is improved by providing the vacuum heat insulating material 25b inside the heat insulating partition wall 29 and the vacuum heat insulating material 25c inside the heat insulating partition wall 30.

Further, in the refrigerator 1, an evaporator (first evaporator) EV1 and its peripheral air passages (F evaporator chamber 8b, freezer compartment air passage 12 and return air passage 12d (see FIG. 3)), which will be described later, and A heat insulating partition wall 27 (panel) is provided between the switching chamber 5 and a part of the second switching chamber 6. The evaporator EV1 constitutes a refrigeration cycle by the compressor 24, a condenser (not shown), and a capillary tube (not shown).

In the refrigerator 1 having such a structure, the first switching chamber 5 when set in the refrigerating temperature zone has the upper surface (the heat insulating partition wall 29), the back surface (the heat insulating partition wall 27), and the adjacent room which are in the freezing temperature zone, Heat is absorbed from the bottom surface (the heat insulating partition wall 30) and the first switching chamber 5 is excessively cooled. Therefore, a heater, which will be described later, is provided in order to maintain the refrigerating temperature zone.

The ice making chamber door 3a, the freezing chamber door 4a, the first switching chamber door 5a, and the second switching chamber door 6a have an ice making chamber container 3b, a freezing chamber container 4b, a first switching chamber container 5b, and a second switching chamber that are integrally drawn out. A chamber container 6b is provided.

The refrigerating compartment temperature sensor 41, the freezing compartment temperature sensor 42, the first switching compartment temperature sensor 43, the first switching compartment temperature sensor 43, A dual switching chamber temperature sensor 44 is provided.

Further, the refrigerating compartment 2 is provided with a refrigerating compartment-side evaporator EV2 (second evaporator). A refrigerating compartment side evaporator temperature sensor 40a is provided above the refrigerating compartment side evaporator EV2. Further, an evaporator temperature sensor 40b is provided above the evaporator EV1. These sensors detect the temperatures of the refrigerating compartment 2, the ice making compartment 3, the upper freezing compartment 4, the first switching compartment 5, the second switching compartment 6, the refrigerator compartment-side evaporator EV2, and the evaporator EV1. Further, an outside air temperature sensor 37 and an outside air humidity sensor 38 are provided inside the door hinge cover 16 on the ceiling of the refrigerator 1 to detect the temperature and humidity of the outside air (outside air). In addition, a door sensor (not shown) is provided to detect the open/closed state of each door 2a, 2b, 3a, 4a, 5a, 6a.

A control board 31 having a CPU, a memory such as ROM and RAM, an interface circuit, and the like, which is a part of the control device, is arranged above the refrigerator 1. The control board 31 includes an outside air temperature sensor 37, an outside air humidity sensor 38, a refrigerating compartment temperature sensor 41, a freezing compartment temperature sensor 42, a first switching compartment temperature sensor 43, a second switching compartment temperature sensor 44, and a refrigerating compartment side evaporator temperature. It is connected to the sensor 40a, the evaporator temperature sensor 40b, etc. by electric wiring (not shown).

Further, the control board 31 is based on the output value of each sensor, the setting of the operation unit 200 (see FIG. 1), the program recorded in advance in the ROM, and the like, and the compressor 24, the refrigerating room side fan 9a, and the blower fan which will be described later. 137, dampers 132, 133, 135, 136 (see FIG. 12) are controlled.

Further, the refrigerator 1 is provided with a defrost heater 21 below the evaporator EV1. The drain water generated during defrosting by the defrosting heater 21 once falls to the gutter 23b and is stored in the evaporation tray 32b provided above the compressor 24 through the drain hole 26.

FIG. 3 is a front view showing the inside of the refrigerator of the present embodiment. 3 shows a state in which the doors 2a, 2b, 3a, 4a, 5a, 6a, the ice making chamber container 3b, the freezing chamber container 4b, the first switching chamber container 5b, and the second switching chamber container 6b are removed from the refrigerator 1. Is schematically shown.
As shown in FIG. 3, the ice making chamber 3 is formed with a discharge port 12a through which cold air in the freezing temperature range is discharged. The upper freezing chamber 4 is formed with a discharge port 12b through which cold air in the freezing temperature range is discharged.

The first switching chamber 5 is formed with a direct cooling discharge port DP1 through which cold air is discharged when set in the freezing temperature zone. The direct cooling discharge port DP1 is formed at a position where the cool air can be directly supplied into the first switching chamber container 5b. In addition, the first switching chamber 5 is formed with an indirect cooling discharge port DP2 through which cool air is discharged when set in the refrigerating temperature zone. The indirect cooling discharge port DP2 is formed at a position where cold air can be supplied to the outside of the first switching chamber container 5b (see FIG. 2). Further, the first switching chamber 5 is formed with a first return port RP1 and a second return port RP2 for returning the cold air after cooling the food to the evaporator EV1 (see FIG. 2).

The second switching chamber 6 is formed with a direct cooling discharge port DP3 through which cold air is discharged when set in the freezing temperature zone. The direct cooling discharge port DP3 is formed at a position where the cool air can be directly supplied into the second switching chamber container 6b (see FIG. 2). Further, the second switching chamber 6 is formed with an indirect cooling discharge port DP4 through which cold air is discharged when the temperature is set in the refrigerating temperature zone. The indirect cooling discharge port DP4 is formed at a position where cold air can be supplied to the outside of the second switching chamber container 6b (see FIG. 2). Further, the second switching chamber 6 is provided with a return port RP3 for returning the cool air discharged from the direct cooling discharge port DP3 and the indirect cooling discharge port DP4 to the evaporator EV1 (see FIG. 2).

Note that the direct cooling is a system in which cold air is directly supplied to the stored food to cool it. Further, indirect cooling is a method of supplying and cooling the stored food so as not to directly hit the stored food in order to suppress the drying of the food.

FIG. 4 is a schematic diagram showing the arrangement of the discharge port and the return port.
As shown in FIG. 4, the heat insulating partition wall 27 includes a front surface portion 27a located on the front surface side (inside the compartment, the front surface side), a left surface portion 27b located on the left side surface, and a right surface portion 27c located on the right side surface. And is configured to project inside the refrigerator. The left side surface portion 27b and the right side surface portion 27c face the inner box 10b (see FIG. 3).

Further, the heat insulating partition wall 30 is arranged so as to divide the heat insulating partition wall 27 into upper and lower parts. Further, the heat insulating partition wall 30 is arranged such that the region of the heat insulating partition wall 27 on the first switching chamber 5 side is wider than the region on the second switching chamber 6 side. In other words, the heat insulating partition wall 27 configures the entire back surface of the first switching chamber 5 in the storage compartment, and forms a part of the rear surface of the second switching chamber 6 in the storage compartment.

The direct cooling outlet DP1 of the first switching chamber 5 is formed in the upper portion of the front surface portion 27a above the heat insulating partition wall 30. The indirect cooling discharge port DP2 of the first switching chamber 5 is formed on the left side surface portion 27b above the heat insulating partition wall 30.

The first return port RP1 of the first switching chamber 5 is formed in the front portion 27a above the heat insulating partition wall 30. The second return port RP2 of the first switching chamber 5 is formed on the right side surface portion 27c above the heat insulating partition wall 30.

The direct cooling discharge port DP3 of the second switching chamber 6 is formed in the front portion 27a below the heat insulating partition wall 30. The indirect cooling discharge port DP4 of the second switching chamber 6 is formed in the left side surface portion 27b below the heat insulating partition wall 30. The return port RP3 of the second switching chamber 6 is formed in the front surface portion 27a below the heat insulating partition wall 30.

The first return port RP1, the second return port RP2, and the return port RP3 communicate with the return air passage 12d (duct) extending in the up-down direction. An upper part of the return air passage 12d communicates with a return port (not shown) provided in the ice making chamber 3 and the upper freezing chamber 4. The flow path is configured so that the cool air returned from each of the return ports RP1, RP2, RP3 returns to the evaporator EV1 (see FIG. 2). The position facing the first return port RP1 of the return air passage 12d and the position facing the second return port RP2 of the return air passage 12d correspond to the merging portion P.

FIG. 5 is an exploded perspective view of the heat insulation partition wall provided on the back surface of the switching chamber when viewed from the front side. FIG. 6 is an exploded perspective view of the heat insulation partition wall provided on the rear surface of the switching chamber as viewed from the rear surface side.
As shown in FIGS. 5 and 6, the heat insulating partition wall 27 includes a panel cover 130 provided on the front side (inside the cabinet), a panel body 131 provided on the back side, dampers 132 and 133, a damper member 134, and a blower fan 137. , A fan cover 138, a cord storage case 139, and the like.

The heat insulating partition wall 27 is also provided with heat insulating materials 141, 142, 143, 144, 145. These heat insulating materials 141 to 145 are made of foamed polystyrene foam (so-called expanded polystyrene).

The panel cover 130 is formed by molding synthetic resin, and has a front surface portion 130a, an upper surface portion 130b, a lower surface portion 130c, a right side surface portion 130d, and a left side surface portion 130e. The front surface portion 130a is arranged on the front surface side and has a substantially rectangular shape. The upper surface portion 130b is formed so as to extend substantially vertically rearward from the upper edge of the front surface portion 130a. The lower surface portion 130c is formed so as to extend substantially vertically rearward from the lower edge of the front surface portion 130a. The right side surface portion 130d is formed to extend substantially vertically rearward from the right end edge of the front surface portion 130a. The left side surface portion 130e is formed to extend substantially vertically rearward from the left end edge of the front surface portion 130a.

Further, the panel cover 130 has a recess 130f into which the heat insulating partition wall 30 (see FIG. 2) is fitted. Further, on the front surface portion 130a of the panel cover 130, direct cooling discharge ports DP1 and DP3 are formed. The direct cooling discharge ports DP1 and DP3 each have a rectangular shape elongated in the left-right direction, and are arranged on the left side when viewed from the front.

The first return port RP1 is formed on the opposite side in the left-right direction (width direction) from the direct cooling discharge port DP1. The first return port RP1 is formed at the lower end of the first switching chamber 5.

The return port RP3 has a rectangular shape elongated in the left-right direction and is arranged on the right side. The return port RP3 is located near the first return port RP1.

Further, the panel cover 130 is formed with a mounting portion 130g to which the cord storage case 139 is mounted.

The panel body 131 is formed by molding a synthetic resin, is provided behind the panel cover 130, and has a substantially rectangular shape that can be fitted to the panel cover 130. The panel body 131 has a substantially rectangular rear surface portion 131a disposed on the rear surface side, an upper surface portion 131b forward from an upper edge of the rear surface portion 131a, and a right side surface portion 131c extending substantially vertically from a right end edge of the rear surface portion 130a. The rear surface 130a has a left side surface portion 131d that extends substantially vertically forward from the left end edge of the rear surface portion 130a.

In addition, the upper surface 131b is provided with an inlet 131h for introducing the return cold air from the ice making chamber 3 and the upper freezing chamber 4. A standing wall 131i extending upward is formed on the upper surface portion 131b. The second return port RP2 described above is formed on the right side surface portion 131c. The second return port RP2 is formed with a plurality of wind direction plates 131s vertically spaced apart from each other. Further, the wind direction plate 131s is formed of a plate-shaped member and is inclined so as to descend from the opening side toward the back side.

Further, the panel body 131 is provided with a horizontally elongated rectangular through hole 131e penetrating in the front-rear direction at a position directly facing the cooling outlet DP1. Further, in the panel body 131, a rectangular through hole 131f penetrating in the front-rear direction is formed at a position directly facing the cooling discharge port DP3. Further, the panel body 131 is formed with a mounting portion 131g to which the cord storage case 139 is mounted.

The damper 132 (freezing temperature zone damper) is for directly introducing cool air for cooling into the first switching chamber 5. The damper 133 (freezer temperature zone damper) is for directly introducing cool air for cooling into the second switching chamber 6. The damper member 134 (damper for refrigerating temperature zone) is a twin damper including a damper 135 and a damper 136. The damper 135 is for introducing cold air for indirect cooling into the first switching chamber 5. The damper 136 is for introducing cold air for indirect cooling into the second switching chamber 6.

As the blower fan 137, a turbofan, which is a centrifugal fan, is arranged substantially vertically, in other words, is arranged so that its rotation axis is oriented in the front-rear direction (horizontal). The blower fan 137 includes a casing 137a, an impeller 137b that is rotatably supported by the casing 137a, a motor 137c that rotationally drives the impeller 137b, and an attachment portion 137d that attaches the casing 137a to the panel body 131. There is.

Since the turbo fan is a high static pressure type blower, it has a characteristic that it is easy to increase the air volume at high static pressure (air passage resistance is large) as compared with a propeller fan generally used in a refrigerator.

The fan cover 138 is made of synthetic resin and is provided on the back surface (rear side) of the blower fan 137 and along the wall surface 138b having a circular introduction port 138a and the peripheral surface of the blower fan 137. And a peripheral wall 138c. The peripheral wall 138c is configured to cover the lower surface side and the right side surface side of the blower fan 137.

The cord storage case 139 has a storage portion 139a for storing cords (electric wires) extending from the dampers 132, 133, 135, 136, the blower fan 137, the heaters H1 to H3, H11 to H14 described later, and the like. In addition, the cord storage case 139 includes a routing portion cover 139b formed on the panel cover 130 and covering a routing portion 130h for routing a cord (electric wire).

The heat insulating material 141 has a surface 141 a contacting the panel cover 130 and a surface 141 b contacting the panel body 131, and is formed so as to fill a gap formed between the panel cover 130 and the panel body 131. .. Further, the heat insulating material 141 is formed with a communication hole 141c that directly connects the cooling discharge port DP1 and the through hole 131e. Further, the heat insulating material 141 is formed with a notch 141d penetrating in the front-rear direction in a concave shape from the upper side at a position facing the cord housing 131g.

In addition, the heat insulating material 141 is formed with a duct wall surface 141e that constitutes a right side wall of the return air passage 12d that returns from the inlet 131h to the evaporator EV1. On the duct wall surface 141e, a return port communication portion 141f is formed by cutting out in a concave shape at a position facing the second return port RP2 formed in the panel body 131.

Further, in the heat insulating material 141, a return port communicating portion 141g is cut out at a position facing the first return port RP1 formed in the panel cover 130.

The heat insulating material 142 is arranged below the heat insulating material 141, and has a surface 142 a that contacts the panel cover 130 and a surface 142 b that contacts the panel body 131. In addition, the heat insulating material 142 is formed with a notch 142c recessed from the upper surface side at a position facing the return port RP3 formed in the panel cover 130.

The heat insulating material 143 is attached to the back side of the panel body 131, and is formed in a substantially L shape in a plan view. Further, the heat insulating material 143 is formed with a cutout portion 143a cut out in a concave shape from the front side at a position facing the standing wall 131i. Further, the heat insulating material 143 is formed with a cutout portion 143b cut out in a concave shape from the front side at a position facing the indirect cooling discharge port DP2 of the panel body 131. Further, the heat insulating material 143 is formed with a cutout portion 143c that is cut out in a concave shape from the front side at a position facing the indirect cooling discharge port DP4 of the panel body 131.

Further, as shown in FIG. 5, the heat insulating material 143 is formed with a fitting holding portion 143d into which the damper 132 is fitted and held. Further, the heat insulating material 143 is formed with a fitting holding portion 143e in which the back side of the damper 133 is fitted and held. Further, the heat insulating material 143 is formed with an air passage 143f extending downward toward the damper 133.

The heat insulating material 144 is formed with a fitting holding portion 144a in which the front surface side of the damper member 134 is fitted and held. Further, the front surface side of the heat insulating material 144 is fitted into the recess 131j formed in the panel body 131. As described above, the heat insulating material 143 and the heat insulating material 144 hold the damper member 134 in a state of being pressed from the front and rear. In addition, the heat insulating material 144 is formed with a fitting portion 144b that fits into the cutout portion 143c of the heat insulating material 143.

The heat insulating material 145 has an elongated plate shape formed in a substantially L shape, and is arranged so as to cover the upper portion of the damper 132, the side portion on the motor side, and the lower portion.

As shown in FIG. 6, on the rear surface (back surface) of the panel body 131, a protruding wall 131k formed along the peripheral wall 138c of the fan cover 138 is formed. A mountain-shaped guide wall 131m is formed on the protruding wall 131k. The guide wall 131m has a first curved portion 131n that sends cool air to the damper 132 side and a second curved portion 131o that sends cool air to the damper member 134 side.

A screw boss 131q for fixing the blower fan 137 with a screw is formed on the rear surface (back surface) of the panel body 13. The blower fan 137 is fixed to the panel body 131 by screwing a screw (not shown) inserted into the mounting portion 137d of the casing 137a into the screw boss 131q.

The heat insulating material 141 is formed with a mountain-shaped fitting portion 141g protruding toward the panel body 131 side. The fitting portion 141g fits into the hollow portion 131r (see FIG. 5) formed in the protruding wall 131m.

FIG. 7 is a perspective view showing a damper for direct cooling of the first switching chamber.
As shown in FIG. 7, the damper 132 includes a flapper 132a, a flapper support portion 132b that supports the flapper 132a (blade member) in an openable/closable manner, a drive portion 132c that applies a rotational driving force to the flapper 132a, and the like. The drive unit 132c opens and closes the flapper 132a by a known technique including a motor and a gear. A sheet-shaped sealing material 132d is attached to the entire front surface of the flapper 132a.

Further, the damper 132 is provided with a heater H1 on the peripheral surface of the flapper support portion 132b. The heater H1 is composed of, for example, a heater wire HE composed of a lead wire having a diameter of 3 mm, and an aluminum sheet AS covering the heater wire HE. The aluminum sheet AS spreads heat from the heater wire HE to the entire flapper support portion 132b, and is made of aluminum foil. The heater H1 is arranged so as to surround almost the entire peripheral surface (side surface) of the damper 132.

A sealing material S1 is provided on the peripheral edge of the opening 132e formed in the flapper support portion 132b. The sealing material S1 is a known material used as packing (for example, polyurethane-based material), and is configured in a rectangular frame shape so as to surround the entire peripheral portion of the opening 132e.

FIG. 8 is a perspective view showing a direct cooling damper of the second switching chamber.
As shown in FIG. 8, the damper 133 includes a flapper 133a, a flapper support portion 133b that supports the flapper 133a (a blade member) so as to be openable and closable, a drive portion 133c that applies a rotational driving force to the flapper 133a, and the like.

Further, the damper 133 is provided with the heater H2 on the peripheral surface of the flapper support portion 133b. The heater H2 is arranged so as to surround almost the entire peripheral surface (side surface) of the flapper supporting portion 133. Further, the flapper support portion 133b is provided with the sealing material S2 over the entire peripheral portion of the opening 133e.

FIG. 9 is a perspective view showing an indirect cooling damper.
As shown in FIG. 9, the damper member 134 includes dampers 135 and 136, and a common drive unit 134a that drives these dampers 135 and 136 independently. Like the dampers 132 and 133, the dampers 135 and 136 include flappers 135a and 136a and flapper support portions 135b and 136b. Although the damper 135 and the damper 136 are integrally formed in the present embodiment, they may be separately formed.

Further, the damper member 134 is provided with a heater H3 on the peripheral surfaces of the flapper support portions 135b and 136b. The heater H3 is arranged so as to surround almost the entire peripheral surface (side surface) of the flapper support portions 135b and 136b. Further, the flapper support portion 135b is provided with the sealing material S3 over the entire peripheral portion of the opening 135c. Further, the flapper support portion 136b is provided with the sealing material S4 over the entire peripheral portion of the opening 136c. Although the sealing materials S3 and S4 are separately provided, the sealing materials S3 and S4 may be integrally provided.

FIG. 10 is a layout view of heaters provided in the panel body.
As shown in FIG. 10, heaters H11 and H12 are provided on the rear surface side (back surface side) of the panel body 131.

The heater H11 is provided on the outer wall surface 12d1 of the return air passage 12d (see FIG. 4). The outer wall surface 12d1 is a side surface on the left side of the return air passage 12d.

The heater H12 is arranged on the upper surface of the protruding wall 131k and the rear surface 131p. Further, the heater H12 is constituted by one heater H12 from the first curved portion 131n to the second curved portion 131o of the protruding wall 131m. The heater H12 is arranged so as to face the blower fan 137 (see FIGS. 5 and 6). Although not shown, the heaters H11 and H12 are composed of a heater wire composed of a lead wire and an aluminum sheet covering the heater wire, like the dampers 132 and 133 and the damper member 134.

In this way, the first bending portion 131n and the second bending portion 131o side and the blower fan 137 side are integrally configured, so that the number of lead wires of the heater can be reduced. Note that the first bending portion 131n and the second bending portion 131o side and the blower fan 137 side may be configured by separate heaters.

FIG. 11 is a layout view of heaters provided on the panel cover.
As shown in FIG. 11, heaters H13 and H14 are arranged on the back side of the front surface portion 130a of the panel cover 130. The heater H13 is configured to be able to heat a region between the direct cooling discharge port DP1 and the direct cooling discharge port DP3. The heater H14 is configured to be able to heat the area between the mounting portion 130g and the first return port RP1.

By the way, when the first switching chamber 5 is set in the refrigerating temperature zone and the second switching chamber 6 is set in the freezing temperature zone, the upper side, the lower side and the inner side of the first switching chamber 5 are all in the freezing temperature zone. It becomes difficult to maintain the switching chamber 5 in the refrigerating temperature zone. Therefore, in the present embodiment, the heaters H13 and H14 are arranged on the back surface of the first switching chamber 5 so that the first switching chamber 5 can be adjusted to the refrigerating temperature zone. The basic structure of the heaters H13 and H14 is composed of a heater wire and an aluminum sheet, like the heaters H11 and H12 described above.

Further, in the first switching chamber 5, it is expected that the side close to the direct cooling discharge port DP1 is cooled well. Therefore, in the heater wire HE that constitutes the heater H14, the density of the heater wire HE1 is increased on the side where the direct cooling discharge port DP1 is provided, and the density of the heater wire HE2 is increased on the side opposite to the direct cooling discharge port DP1. Lower. Thereby, the temperature unevenness of the first switching chamber 5 can be suppressed.

FIG. 12 is a diagram illustrating the flow of cold air. 12 shows the inside of the refrigerator 1 as viewed from the front.
As shown in FIG. 12, the cool air discharged upward from the blower fan 137 is discharged from the discharge port 12a to the ice making chamber 3 and from the discharge port 12b to the upper freezing chamber 4. When the damper 132 is open, the cool air discharged from the blower fan 137 passes through the damper 132 and is directly discharged from the cooling discharge port DP1 to the first switching chamber 5. When the damper 133 is opened, the cool air discharged from the blower fan 137 passes through the damper 133 and is discharged directly from the cooling discharge port DP3 to the second switching chamber 6.

When the damper 135 is opened, the cool air discharged from the blower fan 137 passes through the damper 135 and is discharged from the indirect cooling discharge port DP2 to the first switching chamber 5. When the damper 136 is open, the cool air discharged from the blower fan 137 passes through the damper 136 and is discharged from the indirect cooling discharge port DP4 to the second switching chamber 6.

In addition, the cold air after cooling the ice making chamber 3 and the upper freezing chamber 4 flows from the outlet 12c to the return air passage 12d, flows vertically downward, and returns from the lower side of the evaporator EV1 to the evaporator EV1. The cool air after cooling the first switching chamber 5 merges into the return air passage 12d from the first return port RP1 and the second return port RP2, and returns from the lower side of the evaporator EV1 to the evaporator EV1. The cool air after cooling the second switching chamber 6 joins the return air passage 12d from the return port RP3 and returns to the evaporator EV1 from the lower side of the evaporator EV1.

FIG. 13 is a schematic diagram showing an air duct structure.
As shown in FIG. 13, the air (cool air) that has become low in temperature by exchanging heat with the evaporator EV1 is blown to the ice making chamber 3 and the upper freezing chamber 4 through the freezing chamber air passage 12 and the discharge ports 12a and 12b. It As a result, water in the ice tray 3c of the ice making chamber 3, ice in the ice making chamber container 3b, food in the freezing chamber container 4b of the upper freezing chamber 4 and the like are cooled. The air that has cooled the ice making chamber 3 and the upper freezing chamber 4 returns from the outlet 12c to the evaporator EV1 via the return air passage 12d and is cooled again by the evaporator EV1.

In the refrigerator 1 of the present embodiment, the first switching chamber 5 and the second switching chamber 6 are also cooled by the air (cool air) whose temperature is low in the evaporator EV1. The blowing of the cool air to the first switching chamber 5 and the second switching chamber 6 is controlled by the dampers 132 and 133 and the dampers 135 and 136, which are ventilation controllers. First, the flow of cold air to the first switching chamber 5 will be described. The flow of cold air in the first switching chamber 5 differs between the freezing mode and the refrigerating mode. When the first switching chamber 5 is in the freezing mode, the damper 132 is opened and the damper 135 is closed. The air cooled by the evaporator EV1 is provided in the first switching chamber 5 through the blower fan 137, the freezer compartment air passage 12, the damper 132, and the direct cooling outlet DP1 of the first switching chamber 5. Air is blown into the switching chamber container 5b to cool the food in the first switching chamber container 5b. Since the cold air directly cools the food in the first switching chamber container 5b, the food in the first switching chamber container 5b can be cooled in a relatively short time.

When the first switching chamber 5 is in the refrigerating mode, the damper 132 is closed and the damper 135 is opened. The air cooled by the evaporator EV1 passes through the blower fan 137, the freezer compartment air passage 12, the damper 135, and the indirect cooling discharge port DP2 of the first switching chamber 5 to the outside (outer periphery) of the first switching chamber container 5b. ). It becomes difficult for the cool air to directly reach the food in the first switching chamber container 5b, that is, since the food is indirectly cooled via the first switching chamber container 5b, it is possible to cool the food while suppressing the drying.

The air discharged from the direct cooling discharge port DP1 or the indirect cooling discharge port DP2 and cooling the inside of the first switching chamber 5 is evaporated from the first return port RP1 and the second return port RP2 via the return air passage 12d. Return to EV1.

Next, the flow of cold air to the second switching chamber 6 will be described. The configuration of the second switching chamber 6 is the same as that of the first switching chamber 5, and the opening/closing of the dampers 133 and 136 is changed depending on the operation mode. When the second switching chamber 6 is in the freezing mode, the damper 133 is opened and the damper 136 is closed. The air (cool air) cooled by the evaporator EV1 is blown into the second switching chamber container 6b through the blower fan 137, the freezer compartment air passage 12, the damper 133, and the direct cooling outlet DP3 of the second switching chamber 6. And the food on the second switching chamber container 6b is cooled. Since the cold air directly cools the food in the second switching chamber container 6b, the food in the second switching chamber container 6b can be cooled in a relatively short time.

When the second switching chamber 6 is in the refrigerating mode, the damper 136 is opened and the damper 133 is closed. The air cooled by the evaporator EV1 passes through the blower fan 137, the freezer compartment air passage 12, the damper 136, and the indirect cooling discharge port DP4 of the second switching chamber 6 to the outside (outer periphery) of the second switching chamber container 6b. ) To cool the food while suppressing the drying of the food as indirect cooling. The air that has cooled the inside of the second switching chamber 6 returns from the return port RP3 to the evaporator EV1 via the return air passage 12d and is cooled again by the evaporator EV1.

Returning to FIG. 12, when the first switching chamber 5 is in the freezing mode, the cool air generated by the evaporator EV1 flows through the damper 132 from the back side to the front side, and the through hole 131e of the panel body 131 (see FIG. 5). , Through the communication hole 141c (see FIG. 5), and is directly discharged from the cooling discharge port DP1 to the front side of the first switching chamber 5. Further, when the first switching chamber 5 is in the refrigerating mode, the cool air generated by the evaporator EV1 flows from the right side to the left side through the damper 135, passes through the cutout portion 143b (see FIG. 5), and the indirect cooling discharge port DP2. Is discharged to the left side of the first switching chamber 5.

Further, when the second switching chamber 6 is in the freezing mode, the cool air generated by the evaporator EV1 flows into the air passage 143f (see FIG. 5), passes through the through hole 131f (see FIG. 5), and directly discharges the cooling air. It is discharged from DP3 toward the front of the second switching chamber 6. When the second switching chamber 6 is in the refrigerating mode, the cold air generated by the evaporator EV1 flows to the damper 136 and is discharged from the indirect cooling discharge port DP4 toward the left side of the second switching chamber 6.

Further, the cool air after being discharged from the discharge port 12a of the ice making chamber 3 and the discharge port 12b of the upper stage freezing chamber 4 is directed downward in the vertical direction from the outlet 12c formed in the upper stage freezing chamber 4 through the return air passage 12d. Flow back to the evaporator EV1. Further, the cool air after being discharged from the direct cooling discharge port DP1 and the indirect cooling discharge port DP2 is supplied to the ice making chamber 3 from the first return port RP1 and the second return port RP2 provided in the return air passage 12d. And it joins with the cool air returning from the upper freezer compartment 4. The combined cool air flows vertically downward and returns to the evaporator EV1. The cool air after being discharged from the direct cooling discharge port DP3 (see FIGS. 3 and 4) and the indirect cooling discharge port DP4 is discharged from the return port RP3, the first return port RP1 and the second return port RP2. It merges with the cool air and returns to the evaporator EV1.

By the way, when the first switching chamber 5 is a switching chamber capable of switching between the refrigerating temperature zone (refrigerating mode) and the freezing temperature zone (refrigerating mode), the opening area of the direct cooling outlet DP1 is changed to the indirect cooling discharge. It must be larger than the opening area of the outlet DP2. Along with this, it is necessary to increase the opening area of the return port of the first switching chamber 5. When the return air passage 12d that returns from the ice making chamber 3 and the upper freezer compartment 4 to the evaporator EV1 is provided and a return port that joins in the middle of the return air passage 12d is provided, when the area of the return port is increased (the return port is If there are two large openings), cold air may flow back into the first switching chamber 5.

Therefore, the refrigerator 1 according to the present embodiment includes the ice making chamber 3 and the upper freezing chamber 4 in the lower stage of the refrigerating chamber 2, the first switching chamber 5 in the lower stage of the ice making chamber 3 and the upper freezing chamber 4, and the ice making chamber 3, An evaporator EV1 that cools the upper freezing chamber 4 and the first switching chamber 5 is provided. Further, the refrigerator 1 includes the return air passage 12d returning from the ice making chamber 3 and the upper freezing chamber 4 to the evaporator EV1, the direct cooling outlet DP1 for discharging the cool air from the evaporator EV1 into the first switching chamber 5 and the indirect cooling outlet DP1. And a cooling discharge port DP2. Further, the refrigerator 1 returns the cool air from the first return port RP1 and the second return port RP2 and the return air passage 12d to which the cool air that has cooled the inside of the first switching chamber 5 returns. And a merging section P for merging the two. In this case, the first return port RP1 opens to the front side. The second return port RP2 opens on the side surface side. Thereby, the opening area of each return port of the first return port RP1 and the second return port RP2 can be reduced, so that the cool air flows back into the first switching chamber 5 from the first return port RP1 and the second return port RP2. It will be difficult. That is, when one large-area opening is formed along the return air passage 12d, the cold air that has flowed back from the return port to the first switching chamber 5 returns to the return port again, and a flow of circulating cold air is generated in the return port. .. However, in the present embodiment, since the return port of the first switching chamber 5 is divided into the first return port RP1 and the second return port RP2 and the opening direction is changed, the inside of the first switching chamber 5 for cold air is changed. It is possible to suppress the backflow to the air flow and the circulation of the cold air described above. As a result, it is possible to realize the refrigerator 1 capable of suppressing the backflow of cold air while reducing the volume of the return air passage 12d.

In the present embodiment, the direct cooling discharge port DP1 that discharges when the first switching chamber 5 is in the freezing temperature range (freezing mode) and the discharge when the first switching chamber 5 is in the cold storage temperature range (cooling mode). And an indirect cooling discharge port DP2. The direct cooling discharge port DP1 is opened to the front side, and the indirect cooling discharge port DP2 is opened to the side face side opposite to the first return port RP1 and the second return port RP2. According to this, it is possible to prevent the cool air discharged from the indirect cooling discharge port DP2 from being short-cut and flowing out from the return ports PR1 and PR2. Therefore, it becomes easy to maintain the inside of the first switching chamber 5 in the refrigerating temperature zone.

Further, in this embodiment, the second return port has a larger opening area than the first return port. This makes it difficult for the cool air directly discharged from the cooling discharge port DP1 to flow backward.

In addition, in the present embodiment, the second return port RP2 includes a plurality of airflow direction plates 131s arranged at intervals in the vertical direction, and these airflow direction plates 131s are inclined so as to descend from the opening side toward the back side. Are arranged (see FIG. 5). As a result, it is possible to prevent the cool air that has flowed downward from the return air passage 12d from flowing backward from the second return port RP2 to the first switching chamber 5.

In addition, the present embodiment includes a heat insulating partition wall 27 (panel) that constitutes the back surface of the first switching chamber 5. The heat insulating partition wall 27 includes a panel body 131 provided with the second return port RP2, a panel cover 130 provided with the first return port RP1, and a heat insulating material 141 provided between the panel body 131 and the panel cover 130. Have. The heat insulating material 141 includes a return port communication portion 141g (first missing part) that allows the return air passage 12d and the first return port RP1 to communicate with each other, and a return port that allows the return air passage 12d and the second return port RP2 to communicate with each other. And a communication portion 141f (second cutout portion). According to this, it is possible to insulate the return air passage 12d and return the cool air from the first return opening RP1 and the second return opening RP2 to the return air passage 12d.

Further, in the present embodiment, the second return port RP2 is located rearward of the panel body 131 in the front-rear direction. According to this, by increasing the distance between the first return port RP1 and the second return port RP2, when the freezing temperature range is higher than when the first return port RP1 and the second return port RP2 are close to each other. It is possible to suppress the backflow of cold air (in the freezing mode).

By the way, in recent years, the heat insulation performance of refrigerators has been improved. Therefore, when the first switching chamber 5 (switching chamber) of the refrigerator 1 is set to the refrigerating temperature zone (refrigerating mode), when the cool air from the evaporator flows into the refrigerator once set to the refrigerating temperature zone, the refrigerating temperature zone The inside of the refrigerator will be too cold. In particular, since the dampers 132, 133, 135, 136 have complicated shapes (because of the shapes having many corners), cold air leakage easily occurs around the dampers 132, 133, 135, 136. Also, when the heaters H1 to H3 are attached around the dampers 132, 133, 135, 136 (see FIGS. 7 to 9), the surfaces of the heaters H1 to H3 become uneven (bumpy), so the sealing material is attached from above. Even if it does, cold air leakage is likely to occur. Therefore, in the following, a structure for suppressing the leakage of cold air from the dampers 132, 133, 135, 136 will be described with reference to FIGS. 14 and 15.

FIG. 14 is an exploded perspective view showing a structure for suppressing cold air leakage of the damper. FIG. 15 is a cross-sectional view showing a structure for suppressing cold air leakage of the damper. Note that, here, the damper member 134 (dampers 135 and 136) having particularly large angles will be described as an example.
As shown in FIG. 14, a reinforcing member 150 made of synthetic resin (for example, ABS resin) is attached to the damper member 134. The reinforcing member 150 is formed of a synthetic resin (for example, polystyrene resin) that is harder than the damper member 134.

The reinforcing member 150 includes a cover portion 151 that covers the periphery of the damper member 134 and a collar portion 152 that forms a sealing surface. The cover portion 151 includes a front surface portion 151 a arranged to face the front surface of the damper member 134, an upper surface portion 151 b arranged on the upper surface of the damper member 134, a left side surface portion 151 c and a right side surface portion arranged on the left and right side surfaces of the damper member 134. 151 d and a lower surface portion 151 e arranged on the lower surface of the damper member 134. In addition, a communication hole 151f that communicates with the opening 135c of the damper 135 and a communication hole 151g that communicates with the opening 136c of the damper 136 are formed in the front surface portion 151a. That is, the front surface of the damper member 134 is configured by the front surface portion 151a which is one surface. The side surface (peripheral surface) of the damper member 134 is composed of an upper surface portion 151b, a left side surface portion 151c, a right side surface portion 151d, and a lower surface portion 151e, which are four surfaces. In this way, the outside of the damper member 134 composed of many surfaces can be switched to a smaller number of surfaces.

The brim portion 152 is formed in a square frame shape in a front view, and is orthogonal to the upper piece portion 152a extending in a direction orthogonal to the upper surface portion 151b, the left side piece portion 152b extending in a direction orthogonal to the left side surface portion 151c, and the right side surface portion 151d. And a lower piece 152d extending in a direction orthogonal to the lower surface 151e. Further, the upper piece 152a and the left and right side pieces 152b, 152c are configured to be continuous surfaces. Further, the lower piece portion 152d and the left and right side portions 152b, 152c are configured to be continuous surfaces. Further, the brim portion 152 is formed so as to be flush with the front surface portion 151 a of the cover portion 151.

As described above, by attaching the reinforcing member 150 to the damper member 134, the number of front surfaces and the number of side surfaces are reduced as compared with the case where only the damper member 134 is used. be able to.

Although not shown, a space in which the damper member 134 is fitted and fixed is formed inside the reinforcing member 150. Further, in the internal space of the reinforcing member 150, a space to be mounted with the heater H3 mounted on the outer peripheral surface is formed.

As shown in FIG. 15, a reinforcement member 152 is attached to the damper member 134, and the reinforcement member 152 is attached to the heat insulating materials 143A and 144A. The upper piece portion 152a of the reinforcing member 152 is inserted, via the sealing material 155, into the recess 146a formed by combining the heat insulating materials 143A and 144A. Similarly, the lower piece portion 152d of the reinforcing member 152 is inserted, via the seal material 155, into the concave portion 146b formed by combining the heat insulating materials 143A and 144A. Although not shown, the left and right side pieces 152b and 152c of the reinforcing member 152 are combined with the heat insulating materials 143A and 144A through the seal material 155 in the same manner as described above. It is inserted into the formed recess.

The seal material 155 is held by being pressed by the heat insulating materials 143A and 144A from the front and rear of the upper piece portion 152a. The sealing material 155 is held by being pressed by the heat insulating materials 143A and 144A from the front and rear of the lower piece portion 152d. As a result, the sealing property of the outer periphery of the damper member 134 is secured by the sealing material 155.

In this manner, the damper member 134 (dampers 135, 136) is formed by attaching the reinforcing member 150 to the damper member 134 having many faces (having many corners) as a separate member to form a shape having few faces (having few corners). The sealing property of can be stably secured. The other dampers 132 and 133 can be configured in the same manner, and the same effect can be obtained.

Although the present embodiment has been described above with reference to the drawings, the present embodiment is not limited to the contents described above and includes various modifications. In the above-described embodiment, the case where the first return port RP1 and the second return port RP2 are provided as the return ports of the first switching chamber 5 has been described as an example, but the return port RP3 of the second switching chamber 6 is described. The return opening that opens to the front side of the interior and the return opening that opens to the side surface may be formed separately. The first return port RP1 and the second return port RP2 may be applied not only to one of the first switching chamber 5 and the second switching chamber 6 but also to both the first switching chamber 5 and the second switching chamber 6.

1 Refrigerator 2 Refrigerator 3 Ice-making chamber (freezer)
4 Upper stage freezing room (freezing room)
5 First switching room (switching room)
6 Second switching room 12d Return air duct (duct)
EV1 evaporator (cooler)
27 Insulation partition wall (panel)
130 panel cover 131 panel body 131s wind direction plate 132, 133, 135, 136 damper 141, 142 heat insulating material 141f return port communication part (second cutout part)
141g Return port communication part (first missing part)
H1 to H14 Heater DP1 Direct cooling discharge port (discharge port, first discharge port)
DP2 Indirect cooling discharge port (discharge port, second discharge port)
DP3 Direct cooling discharge port DP4 Indirect cooling discharge port P Merging part RP1 First return port (return port)
RP2 Second return port (return port)

Claims (6)

A freezer room at the bottom of the refrigerator room,
A switching chamber that is provided in the lower stage of the freezing chamber and that can switch from the refrigerating temperature zone to the freezing temperature zone
A cooler for cooling the freezing chamber and the switching chamber,
A duct returning from the freezer to the cooler,
A discharge port for discharging cool air from the cooler into the switching chamber,
A return port for returning cold air that has cooled the switching chamber,
A merging portion that merges the cool air from the return port with the duct,
Equipped with
The said return port has the 1st return port opened to the front side, and the 2nd return port opened to the side surface side, The refrigerator characterized by the above-mentioned. The refrigerator according to claim 1,
The discharge port has a first discharge port that discharges when the switching chamber is in a freezing temperature range, and a second discharge port that discharges when the switching chamber is in a refrigerating temperature range,
The first discharge port is opened to the front side,
The said 2nd discharge port is opening at the side surface side opposite to the said 2nd return port, The refrigerator characterized by the above-mentioned. The refrigerator according to claim 1 or 2,
The second return port has an opening area larger than that of the first return port. The refrigerator according to any one of claims 1 to 3,
The second return port comprises a plurality of wind direction plates arranged at intervals in the vertical direction,
The said wind direction board is arrange|positioned so that it may incline so that it may go down toward the back side from the opening side, The refrigerator characterized by the above-mentioned. The refrigerator according to any one of claims 1 to 4,
A panel constituting the back of the switching chamber,
The panel has a panel body provided with the second return port, a panel cover provided with the first return port, and a heat insulating material provided between the panel body and the panel cover,
The said heat insulating material has a 1st notch part which connects the said duct and the said 1st return port, and a 2nd notch part which connects the said duct and the said 2nd return port, The refrigerator characterized by the above-mentioned. .. The refrigerator according to claim 5,
The second return port is located rearward of the panel body in the front-rear direction.