JP2009192112A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of uniforming an indoor temperature of a storage compartment. <P>SOLUTION: This refrigerator comprises a storage compartment 2 receiving stored objects, a cooler 11 producing cold air, an inflow passage 32 through which the cold air flowing from a cooler 11 to the storage compartment 2 through discharge openings 71m, 71n, passes, and an outflow passage 34 through which the cold air flowing out from the storage compartment 2 through return openings 2d, 2e, 2f passes, the return openings 2d, 2e, 2f are disposed at a lower portion of the storage compartment 2 over from the vicinity of a lower portion of the inflow passage 32 to the vicinity of a side wall 2g of the storage compartment 2, and a cold air returning portion 34a facing the return openings 2d, 2e, 2f and extending right and left is disposed at an upper portion of the outflow passage 34. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a refrigerator that delivers cold air to a storage room through a cold air passage.

  A conventional refrigerator is disclosed in Patent Document 1. This refrigerator has a freezer compartment below the refrigerator compartment and a vegetable compartment below the freezer compartment. A cooler that generates cool air is provided behind the freezer compartment. An inflow passage through which cool air flowing from the cooler into the refrigerating room flows is provided on the back surface of the refrigerating room, and a plurality of discharge ports for discharging cool air are provided in a distributed manner on the back surface periphery of the refrigerating room. A return port through which cold air flows out of the refrigerator compartment is provided in the lower right part of the back of the refrigerator compartment. An outflow passage is led out to the return port, and the refrigerator compartment and the vegetable compartment communicate with each other through the outflow passage.

  The cold air generated by the cooler flows through the inflow passage and is discharged from the discharge port to the refrigerator compartment. The cold air discharged into the refrigerator compartment flows through the refrigerator compartment and flows out of the refrigerator compartment through the return port. The cold air that flows out from the return port flows through the outflow passage and is guided to the vegetable compartment. Thereby, the refrigerator compartment and the vegetable compartment are cooled.

Japanese Patent Laid-Open No. 10-47828 JP 2002-147915 A Japanese Patent Laid-Open No. 10-288440

  However, according to the conventional refrigerator, the cold air generated by the cooler is discharged to the refrigerating room through the discharge port, and flows out of the refrigerating room through the return port provided in the lower right part of the refrigerating room. For this reason, it is difficult for cold air to reach the lower left part of the refrigerator compartment, and there is a problem that the room temperature of the refrigerator compartment cannot be made uniform.

  An object of this invention is to provide the refrigerator which can make the indoor temperature of a storage room uniform.

  In order to achieve the above object, the present invention includes a storage chamber for storing a stored item, a cooler for generating cold air, an inflow passage through which cool air flowing from the cooler into the storage chamber through a discharge port passes, An outflow passage through which cool air flowing out from the storage chamber through the return port passes, and the return port is provided in the lower portion of the storage chamber from the vicinity of the lower portion of the inflow passage to the vicinity of the side wall of the storage chamber. A cold air return portion facing left and right is provided in the upper part of the outflow passage.

  According to this configuration, the cold air generated by the cooler flows through the inflow passage and is discharged from the discharge port into the storage chamber. The cold air flowing into the storage room flows through the storage room and flows out from a return port provided at the lower part of the storage room. The return port is provided in a wide range from the vicinity of the lower portion of the inflow passage to the vicinity of the side wall of the storage chamber, and the cold air return portion provided at the upper portion of the outflow passage extends to the left and right so as to face the return port. The cold air flowing out from the return port flows through the outflow passage through the cold air return portion extending left and right and returns to the cooler.

  In the refrigerator configured as described above, the lower portion of the inflow passage is arranged to be biased to one of the left and right sides, and the side wall is disposed on a side away from the lower portion of the inflow passage. . According to this configuration, the lower portion of the inflow passage is disposed, for example, to the left, and the return port is provided from the vicinity of the lower portion of the inflow passage to the vicinity of the right side wall.

  In the refrigerator having the above-described configuration, the outflow passage extends downward along the side wall from the cold air return portion, and the vertical width of the return port is closer to the side wall than the position away from the side wall. It is characterized by being smaller. According to this configuration, the outflow passage is formed so as to extend vertically below the cool air return portion, for example, along the right side wall, and the return port is formed so that the vertical width of the right portion is narrower than the vertical width of the left portion.

  Further, the present invention is characterized in that, in the refrigerator configured as described above, a plurality of the return openings are divided into left and right.

  Further, the present invention, in the refrigerator having the above-described configuration, includes a member that is disposed on at least the back side of the storage chamber and includes a heat conductive plate that discharges cold heat to the storage chamber over a plurality of shelves, and the discharge port includes the discharge port. It is characterized by being arranged around the member. According to this structure, the cold heat of the cold air discharged from the discharge port arranged around the heat conduction plate and guided to the return port at the lower part of the storage chamber is transmitted to the member. The cold heat transmitted to the member is discharged into a storage chamber from a wide range over a plurality of shelves, and the storage chamber is cooled.

  According to the present invention, the return port provided in the lower portion of the storage chamber is provided from the vicinity of the lower portion of the inflow passage to the vicinity of the side wall of the storage chamber, and the cold air return portion extending left and right facing the return port is provided in the upper portion of the outflow passage. . Therefore, the cool air can be sufficiently circulated in the storage chamber to uniformly cool the storage chamber.

  Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show front views of the refrigerator according to the first embodiment with the door closed and opened. The refrigerator 1 is provided with a refrigerator compartment 2 at the top, and below the refrigerator compartment 2, a temperature switching chamber 3 and an ice making chamber 4 are arranged side by side. A freezing room 6 is arranged below the temperature switching room 3 and the ice making room 4, and a vegetable room 5 is arranged below the freezing room 6. The doors of the refrigerator compartment 2 are provided on the left and right sides of the middle and are double-opened.

  The refrigerator compartment 2 stores stored items in a refrigerator, and the vegetable compartment 5 cools and preserves vegetables at a room temperature (about 8 ° C.) higher than the refrigerator compartment 2. As will be described later in detail, the temperature switching chamber 3 can be switched by the user at room temperature. The freezer 6 stores the stored items in a frozen state, and the ice making chamber 4 communicates with the freezer 6 to make ice. The ice making chamber 4 and the freezing chamber 6 are maintained below the freezing point.

  In the lower part of the refrigerator compartment 2, a chilled chamber 21, an accessory storage chamber 102, and a water tank chamber 103, which are isolated chambers, are arranged side by side. The chilled chamber 21 is maintained in a temperature range different from that of the refrigerator compartment 2, for example, a chilled temperature range (about 0 ° C.). An ice greenhouse maintained at an ice temperature (about −3 ° C.) may be provided instead of the chilled chamber 21. In the tank chamber 103, a water tank 103a for ice making is detachably stored. The accessory storage chamber 102 is disposed in front of a cold air passage 32 (see FIG. 3), which will be described later, and has an accessory case 102a (see FIG. 5) for storing accessories such as eggs.

  3 and 4 show a front sectional view of the refrigerator 1 and a side sectional view passing through the tank chamber 103. The main body of the refrigerator 1 is configured by filling a foam heat insulating material 1c between the outer box 1a and the inner box 1b. The ice making chamber 4 and the temperature switching chamber 3 are separated from the refrigerator compartment 2 by a heat insulating wall 7, and the freezer compartment 6 and the vegetable compartment 5 are separated from each other by a heat insulating wall 8. Thereby, the heat insulation wall 7 forms the bottom wall of the refrigerator compartment 2, and the heat insulation wall 8 forms the top wall of the vegetable compartment 5. Further, the temperature switching chamber 3 and the freezing chamber 6 are isolated by a heat insulating wall 35, and the temperature switching chamber 3 and the ice making chamber 4 are isolated by a vertical heat insulating wall 36.

  When the foam heat insulating material 1c is filled between the outer box 1a and the inner box 1b, the heat insulating walls 7 and 8 are filled simultaneously. That is, the stock solution of the foam heat insulating material 1c is injected simultaneously between the outer box 1a and the inner box 1b and into the heat insulating walls 7 and 8 communicating with the outer box 1a, and is foamed integrally. By filling the heat insulating walls 7 and 8 simultaneously with the space between the outer box 1a and the inner box 1b with the foam heat insulating material 1c such as urethane foam heat insulating material, the heat insulating walls 7 and 8 can be easily formed thin. Therefore, the internal volume of the refrigerator 1 can be secured widely.

  Further, the exterior of the heat insulating walls 7 and 8 is made of a member different from the inner box 1b, and before filling with the foam heat insulating material 1c, the side surfaces of the heat insulating walls 7 and 8 are opened and the inner box 1b is formed of the heat insulating walls 7 and 8. Open to face the side. By filling the foam heat insulating material 1c, the openings on the side surfaces of the heat insulating walls 7 and 8 and the opening of the inner box 1b are connected and integrated.

  Thereby, the leakage of cold air or warm air between the storage chambers separated by the heat insulating walls 7 and 8 in different temperature zones is prevented. Therefore, it is possible to save energy by reducing heat loss. Moreover, the abnormal noise which generate | occur | produces by the vibration of the heat insulation walls 7 and 8 and the sliding of the heat insulation walls 7 and 8 and the inner case 1b by this vibration can be prevented. In addition, the structural strength can be increased by integral formation.

  The heat insulating walls 7 and 8 may be formed of an independent member composed of a heat insulating material such as expanded polystyrene separately from the main body and an exterior. The heat insulating walls 7 and 8 and the main body can be integrated by integrally forming the heat insulating walls 7 and 8 after being attached to predetermined portions of the main body.

  The ice making room 4, the freezing room 6, the vegetable room 5 and the temperature switching room 3 are provided with a storage case 43 for storing stored items. The refrigerator compartment 2 is provided with a plurality of storage shelves 41 on which stored items are placed. A plurality of storage pockets 42 are provided on the door of the refrigerator compartment 2. As a result, the usability of the refrigerator 1 is improved.

  A machine room 50 is provided behind the vegetable room 5, and a compressor 57 (see FIG. 5) is arranged in the machine room 50. The compressor 57 is connected to a condenser, an expander (not shown) and a cooler 11, and a refrigerant such as isobutane is circulated by driving the compressor 57 to constitute a refrigeration cycle. The cooler 11 is on the low temperature side of the refrigeration cycle.

  A cool air passage 32 (inflow passage) through which cool air flows is arranged behind the refrigerator compartment 2. The front surface of the cool air passage 32 is formed by a cooling panel 70 having a member 72 made of a good heat conductor. The cold air passage 32 extends upward from the refrigerator compartment damper 20, and an inflow portion 32 c having a narrow lateral width is provided in the lower portion of the refrigerator compartment 2. The cool air passage 32 branches right and left above the inflow portion 32c, and has a right passage 32a and a left passage 32b at the top.

  A plurality of discharge ports 71m and 71n are respectively provided at the side ends of the right passage 32a and the left passage 32b so as to open laterally. The opening areas of the lower discharge ports 71m and 71n are smaller than the opening areas of the upper discharge ports 71m and 71n. Thus, the amount of cool air discharged from the lower discharge ports 71m and 71n close to the cool air inflow side of the cool air passage 32 and close to return ports 2d, 2e, and 2f described later is limited. Thereby, cold air can be guided to the upper part of the cold air passage 32. Discharge ports 101a and 101b for discharging cool air to the chilled chamber 21 are provided at the lower end of the right passage 32a.

  A plurality of return ports 2d, 2e, and 2f through which the cold air in the refrigerator compartment 2 flows out are provided at the lower back of the chilled chamber 21. The inflow portion 32c of the cold air passage 32 is arranged to be biased leftward, and the return port 2f is provided in the vicinity of the inflow portion 32c. The return port 2d is disposed in the vicinity of the side wall 2g of the refrigerator compartment 2 on the side away from the inflow portion 32c. The return port 2e is disposed between the return ports 2d and 2f. Accordingly, the return ports 2d, 2e, and 2f through which the cold air flows out from the refrigerator compartment 2 are provided from the vicinity of the inflow portion 32c of the cold air passage 32 to the vicinity of the side wall 2g.

  The vertical width of the return port 2e is narrower than the vertical width of the return port 2f, and the vertical width of the return port 2d is narrower than the vertical width of the return port 2e. That is, the vertical widths of the return ports 2d, 2e, and 2f are smaller at the position closer to the side wall 2g than at the position away from the side wall 2g.

  A communication passage 34 (outflow passage) that allows the refrigerator compartment 2 and the vegetable compartment 5 to communicate with each other is led out to the return ports 2d, 2e, and 2f. The communication passage 34 is formed with a cold air return portion 34a (see FIG. 6) extending left and right facing the return ports 2d, 2e, and 2f and extending downward from the cold air return portion 34a along the side wall 2g. The An inflow port 104 that opens to the vegetable compartment 5 is provided at the lower end of the communication path 34. Further, a circulation fan 23, which will be described in detail later, is disposed in the communication path 34.

  FIG. 5 shows a side sectional view through the accessory storage chamber 102 of the refrigerator 1. Behind the freezer compartment 6 is provided a cold air passage 31 partitioned by a back plate 6a. The cold air passage 31 communicates with the cold air passage 32 via the refrigerator compartment damper 20. Since the cold air immediately after flowing into the cold air passage 32 from the refrigerator compartment damper 20 is extremely low temperature (about −20 ° C. to −18 ° C.), a heat insulating material 107 is disposed inside the cold air passage 32. Thereby, dew condensation on the back wall surface of the refrigerator compartment 2 can be prevented.

  On the downstream side of the refrigerator compartment damper 20, the back wall of the refrigerator compartment 2 is inclined, and the depth of the cold air passage 32 is reduced to about 10 mm. Thereby, the depth of the cold air | gas channel | path 32 can be formed narrowly, and the depth of the refrigerator compartment 2 can be ensured widely.

  Moreover, the refrigerator compartment damper 20 is arrange | positioned in the position which overlaps with the heat insulation wall 7 in front projection. For this reason, the refrigerator compartment damper 20 does not protrude into the refrigerator compartment 2 or the freezer compartment 6, and the refrigerator compartment 2 and the refrigerator compartment 6 can be formed widely.

  The cool air passage 31 is partitioned into a front part 31a and a rear part 31b by a partition plate 31c, and the cooler 11 is arranged in the rear part 31b. The cooler 11 on the low temperature side of the refrigeration cycle exchanges heat with the air flowing through the rear portion 31b of the cool air passage 31 to generate cool air. Since the cooler 11 is arranged on the back side of the freezer compartment 6, the cold heat of the cooler 11 is released to the freezer compartment 6 side through the partition plate 31c and the back plate 6a. For this reason, the freezer compartment 6 is indirectly cooled efficiently, and the cooling efficiency is improved.

  A defrost heater 33 for defrosting the cooler 11 is provided below the cooler 11. Below the defrost heater 33, a drain pan 63 for receiving water by defrost is provided. The drain pan 63 is provided with a drain pipe 64, and drain water is guided to the evaporation dish 66 (see FIG. 4) disposed in the machine room 50 through the drain pipe 64.

  A freezer compartment blower 12 composed of an axial fan is disposed in the cold air passage 31 with the rotational axis direction horizontal. The cold air passage 31 is provided with an opening (not shown) facing the ice making chamber 4 in front of the freezer fan 12. In the lower part of the freezer compartment 6, there is provided a return port 22 that opens in front of the cooler 11 and returns cool air to the cooler 11.

  As will be described in detail later, the cold air generated by the cooler 11 flows through the front portion 31 a of the cold air passage 31 by driving the freezer compartment fan 12, and is supplied to the ice making chamber 4, the freezer compartment 6, and the temperature switching chamber 3. . The cold air is supplied to the refrigerating room 2, the chilled room 21, and the vegetable room 5 through the cold air passage 32 by driving the circulation blower 23 (see FIG. 6). In the upper part of the vegetable compartment 5, there is provided a return passage 46 that opens to the front of the vegetable compartment 5 and the front of the cold air passage 31 and returns the cold air to the cooler 11.

  As shown in FIG. 3 described above, the cooler 11 is disposed to be biased toward the ice making chamber 4, and the communication path 34 is disposed to the side of the cooler 11. The cooler 11 is formed by meandering refrigerant pipes 11a through which refrigerant flows, and left and right ends of the refrigerant pipes 11a are supported by end plates 11b. A large number of fins (not shown) for heat dissipation are provided in contact with the refrigerant pipe 11a. A gas-liquid separator 45 is connected to the upper part of the refrigerant pipe 11a.

  Further, the refrigerator compartment damper 20 and the freezer compartment fan 12 are arranged in the vertical direction so as to be biased in the same direction as the cooler 11. That is, the refrigerator compartment damper 20 and the freezer compartment fan 12 are arranged so as to overlap in the planar projection. Thereby, while the width | variety of the left-right direction of the refrigerator 1 can be narrowed, the cool air passages 31 and 32 can be shortened and volume efficiency and ventilation efficiency can be improved more.

  In addition, the cooler 11, the freezer compartment fan 12, and the refrigerator compartment damper 20 are provided in one direction of the left-right direction of the refrigerator main body, and the communicating path 34 is provided in the side (temperature switching chamber 3 side) different from the cooler 11. For this reason, the refrigerator compartment damper 20 and the circulation blower 23 can be sufficiently spaced in the left-right direction. Therefore, the refrigerator compartment damper 20 and the circulation blower 23 can be stored comfortably behind the heat insulation wall 7.

  Further, an introduction ventilation path 15 that branches from the cold air passage 31 and guides the cold air to the temperature switching chamber 3 is provided. In order to secure a large volume of the temperature switching chamber 3, the vertical heat insulating wall 36 that separates the temperature switching chamber 3 and the ice making chamber 4 is arranged biased to the left in FIG. 3. When the front portion 31 a of the cold air passage 31 and the refrigerator compartment damper 20 are provided behind the temperature switching chamber 3, heat is released from the temperature switching chamber 3 to the cold air in the cold air passage 31.

  If the cold air flowing through the cold air passage 31 is, for example, −23 ° C., and the temperature switching chamber 3 is controlled to a temperature higher than the cold air (for example, 3 ° C., 8 ° C., or 50 ° C.), the heat loss increases. For this reason, the refrigerator compartment damper 20 and the front part 31a (see FIG. 5) of the cold air passage 31 are provided behind the vertical heat insulating wall 36 or on the left side thereof to prevent heat from being released from the temperature switching chamber 3 to the cold air. Yes. Thereby, cooling efficiency can be improved more.

  FIG. 7 shows an enlarged side sectional view of the refrigerator compartment 2. FIG. 8 shows a top cross-sectional view of the refrigerator 1 and is a cross-sectional view taken along line EE in FIG. The cooling panel 70 forming the cold air passage 32 is disposed on the back wall of the refrigerator compartment 2. The cooling panel 70 has a width that substantially covers the width of the refrigerator compartment 2. The cooling panel 70 has a rectangular front shape, and is formed by combining a panel base 71 made of a heat insulating material with a member 72 made of a metal plate of a good heat conductor.

  An interior lighting device 80 is provided on the ceiling of the refrigerator compartment 2. The cover 81 of the interior lighting device 80 has a width substantially equal to that of the cooling panel 70, and the depth is formed to be approximately half of the depth of the refrigerator compartment 2. Thereby, the interior lighting device 80 has a large area as a whole. An engagement portion 81a with which the end cover 73 (see FIG. 10) of the cooling panel 70 is engaged is provided at the rear corner of the cover 81.

  The cover 81 is subjected to diamond cutting, for example, and functions as a light diffusing plate. Light sources 82 made up of a plurality of LEDs are distributed and arranged at several places in the space surrounded by the cover 81. The interior lighting device 80 is lit in conjunction with the opening of the refrigerator compartment 2 door. When the interior lighting device 80 is turned on, the light emitted from the light source 82 is reflected by the cooling panel 70 and the interior of the refrigerator compartment 2 is illuminated.

  The cooling panel 70 has a member 72 disposed on the front surface of the panel base 71. The member 72 is provided in a wide range over the plurality of storage shelves 41. As the material of the panel base 71, for example, polystyrene can be selected. As the material of the member 72, aluminum, stainless steel, copper, brass, plated steel plate, or the like can be selected. It is more desirable that the member 72 is made of aluminum in consideration of thermal conductivity, rust prevention, strength, lightness, price, and the like.

  The front surface of the cooling panel 70 is a cylindrical surface having a vertical axis, and is curved convexly. The cylindrical surface shape of the cooling panel 70 is formed by the shape of the panel base 71. The member 72 is formed in a flat plate shape and is curved in close contact with the panel base 71 when combined with the panel base 71.

  FIG. 9 is an enlarged view of a portion H in FIG. The left and right ends of the member 72 are formed with bent portions 72a that are bent into a planar U-shape. The member 72 is locked so as to hold the panel base 71 by the bent portion 72a. Thereby, the whole cooling panel 70 is covered with the member 72, the panel base 71 is not exposed, and the beauty of the cooling panel 70 is improved. In addition, the presence of the U-shaped bent portions 72 a at the left and right ends of the member 72 can increase the strength of the cooling panel 70.

  10 and 11 show a front view and a side view of the cooling panel 70. The metal surface on the surface of the member 72 is mirror-finished by buffing or the like, for example. A large number of beads 72b are formed on the surface in stripes. The beads 72b are formed to have a width of, for example, 2 mm and an interval between the beads 72b of 7 mm. The bead 72 b is formed horizontally and extends along the circumferential direction of the cylindrical surface of the cooling panel 70.

  FIG. 12 shows a rear view of the cooling panel 70. FIG. 13 shows a sectional view taken along the line DD of FIG. The panel base 71 has a lattice-like skeleton 71a. The cooling panel 70 can have sufficient strength by the skeleton 71a. A part of the skeleton part 71a projects downward, and this part becomes the cold air introduction part 71b.

  The front surface of the cold air introducing portion 71b defined by the skeleton portion 71a faces the member 72 and is filled with a heat insulating material 71d. In addition, the space between the lattices of the lower skeleton 71a close to the cold air introduction part 71b is filled with the heat insulating material 71c. The heat insulating material 71d is formed thicker than the heat insulating material 71c. Further, the heat insulating material is not buried between the lattices of the upper skeleton part 71a away from the cold air introduction part 71b, and the cold air directly hits the back surface of the member 72.

  As a result, the thermal conductivity of the cooling panel 70 (the thermal conductivity in the normal direction of the panel surface) is higher at a position away from the vicinity of the cool air introduction portion 71b. For this reason, the surface temperature of the portion close to the cool air introduction portion 71b in the cooling panel 70 does not drop compared to other portions, and the surface temperature of the cooling panel 70 becomes uniform. Thereby, the temperature nonuniformity in the refrigerator compartment 2 can be made small. In addition, condensation, frost formation, icing, and the like at a position close to the cold air introduction portion 71b can be reduced, and dripping of a large amount of water droplets due to abnormal occurrence of many of these can be prevented.

  The difference in thermal conductivity for each part of the cooling panel 70 can be easily set by the heat insulating material 71c. By increasing the thickness step of the heat insulating material 71c, the difference in thermal conductivity can be set more finely.

  In addition, a rib 71e surrounding the outer periphery is provided on the back surface of the panel base 71. A rib 71 f extending in the vertical direction is formed at the center of the back surface of the panel base 71. The upper end of the rib 71f is continuous with the rib 71e, and the lower end is separated from the rib 71e. The rear surface of the panel base 71 is divided into a right section 71g and a left section 71h by the ribs 71e and 71f.

  The right section 71g forms a right passage 32a (see FIG. 3) of the cold air passage 32, and the left section 71h forms a left passage 32b (see FIG. 3) of the cold air passage 32. A plurality of openings are formed in the ribs 71e forming the side walls of the right section 71g and the left section 71h to form discharge ports 71m and 71n.

  A rib 71i extending in the lateral direction is formed at the lower end of the rib 71f. The cool air flowing in from the cool air introducing portion 71b (see FIG. 3) is guided to the left and right by the ribs 71i. In addition, throttle portions 71j and 71k (see FIG. 3) for narrowing the flow path of the cool air guided to the right passage 32a and the left passage 32b by the rib 71i are formed. All of the ribs 71e, 71f, 71i are in close contact with the back wall of the refrigerator compartment 2.

  The positions, orientations, shapes, and dimensions of the throttle portions 71j and 71k are set so that the amount of cold air introduced corresponds to the area ratio of the right section 71g and the left section 71h. For this reason, although the cold air introducing | transducing part 71b is biased and provided in the right side of the back wall of the refrigerator compartment 2, the amount of cold air which passes along the right channel | path 32a and the amount of cold air which flows through the left channel | path 32b can be made into the substantially same quantity. Thereby, the surface temperature of the cooling panel 70 is made uniform.

  Synthetic resin end covers 73 and 74 are fitted and attached to the upper and lower ends of the cooling panel 70. FIG. 14 shows a detailed view of a portion F in FIG. The end cover 73 has a claw 73 a that engages with a through hole 72 c formed in the member 72. A plurality of claws 73a are provided, whereby the end cover 73 can be attached to the cooling panel 70 without using screws or the like.

  FIG. 15 shows a detailed view of the G part in FIG. Similarly to the above, the end cover 74 also has a claw 74 a that engages with a through hole 72 d formed in the member 72. Thereby, the end cover 74 can be attached to the cooling panel 70 without using screws or the like. Furthermore, the panel base 71 is covered and covered by the end covers 73 and 74, and the aesthetic appearance of the cooling panel 70 can be improved.

  As shown in FIGS. 10 and 12, the end cover 74 is formed with a skirt portion 74b that covers the cool air return portion 34a, and the return ports 2d and 2e and a part of the return portion 2f are opened in the skirt portion 74b. To do.

  The cooling panel 70 can be attached to and detached from the engaging portion 81a of the interior lighting device 80 and the engaging portion 7a (see FIG. 7) provided on the heat insulating wall 7. At this time, since the resin-made end covers 73 and 74 have elasticity and are easy to slide, the cooling panel 70 can be easily attached and detached without using a tool in the manner of inserting a shoji or a bag.

  When the assembled cooling panel 70 is engaged with the engaging portions 81a and 7a and attached, and the cool air flows through the cool air passage 32, the member 72 is cooled by the cool air. Since the thermal conductivity of the cooling panel 70 is adjusted by the heat insulating material 71c, the surface temperature of the member 72 is almost the same at any part.

  Further, the member 72 in the vicinity of the discharge ports 71m and 71n is cooled by mixing a part of the cool air discharged from the discharge ports 71m and 71n into the refrigerator compartment 2 and the cool air in the refrigerator. Since the member 72 has high thermal conductivity, the cooling region is widened. The member 72 whose surface has been cooled releases cold heat into the refrigerator compartment 2. Thereby, the room temperature is made uniform.

  Instead of providing the cool air passage 32 on the back side of the member 72, a cool air passage that leads from the refrigerator compartment damper 20 to the discharge ports 71m and 71n may be provided at another position. At this time, by providing the discharge ports 71m and 71n around the member 72, the room temperature can be made uniform by the same effect as described above.

  When the door of the refrigerator compartment 2 is opened, outside air flows in, but moisture contained in the outside air immediately condenses on the surface of the member 72. This moisture evaporates after the door of the refrigerator compartment 2 is closed, and the humidity in the refrigerator compartment 2 is maintained.

  FIG. 6 shows a side sectional view through the chilled chamber 21 of the refrigerator 1. A cool air return portion 34a formed in the upper portion of the communication passage 34 is disposed behind the chilled chamber 21 of the refrigerator compartment 2, and return ports 2d, 2e, and 2f are opened in front of the cool air return portion 34a. Further, a discharge port 106 (see FIG. 3) of the cold air passage 32 opens in the side wall of the cold air return portion 34a.

  A temperature detector 105 is provided in the vicinity of the wall surface of the cool air return section 34a. The temperature detector 105 detects the temperature of the cold air flowing from the refrigerator compartment 2 into the cold air return unit 34a. Based on the detection result of the temperature detection device 105, it is determined whether or not it is necessary to supply cold air to the refrigerator compartment 2, and the temperature of the refrigerator compartment 2 is controlled.

  When stored items are stored in the vicinity of the return ports 2d, 2e, and 2f, the temperature of the cold air flowing out from the return ports 2d, 2e, and 2f may suddenly rise due to the stored items. Thereby, the temperature detection apparatus 105 detects a temperature rise, supplies cold air to the refrigerator compartment 2, and the other stored item cooled enough may be cooled too much.

  At this time, a small amount of cold air may be supplied from the discharge port 106 provided in the cold air passage 32 to the cold air return portion 34a. As a result, the cold supplied from the discharge port 106 is mixed with the cool air that suddenly rises in temperature and flows out from the refrigerating chamber 2 or the like to the communication passage 34 via the return ports 2d, 2e, and 2f. Therefore, the temperature rise of the cold air in the vicinity of the temperature detection device 105 is alleviated, and the stored product can be prevented from being cooled more than necessary.

  The circulation blower 23 provided in the communication path 34 is composed of an axial fan, and is arranged in the same horizontal plane so as to overlap the heat insulating wall 7 in front projection. Thereby, the circulation blower 23 is not disposed behind the refrigerator compartment 2, and the depth of the cold air passage 32 can be narrowed. Accordingly, the depth of the refrigerator compartment 2 in front of the cold air passage 32 is increased, and the volume of the refrigerator compartment 2 can be secured widely.

  In addition, even if the circulation air blower 23 is arrange | positioned in another position, it can distribute | circulate the cold air | gas produced | generated with the cooler 11 to the refrigerator compartment 2 and the vegetable compartment 5. FIG. That is, the circulation blower 23 can be disposed at an arbitrary position in the cold air flow path from the cold air passage 32 including the cold air passage 32 to the communication passage 34 via the refrigerating chamber 2. For example, although the volumes of the accessory storage chamber 102 and the accessory case 102a are slightly reduced, the circulation fan 23 can be provided by expanding the space in the front-rear direction of the cool air passage 32 in the cool air passage 32 in the vicinity of the refrigerator compartment damper 20.

  In addition, the circulation blower 23 is disposed so as to be inclined so that the intake side is directed upward, the exhaust side is directed downward, and the rear is lowered. Thereby, even if the depth of the communicating path 34 is narrowed, the wide and large circulating fan 23 can be stored without difficulty, and the efficiency of suction and discharge is not reduced.

  In addition, the exhaust passage side of the communication passage 34 is disposed forward of the intake side of the circulation fan 23. Thereby, while being able to distribute | circulate cold air smoothly, the depth of the refrigerator compartment 2 can be ensured widely. In addition, since the heat insulating wall is formed thick behind the low temperature freezer compartment 6, the communication path 34 downstream of the circulation fan 23 can be disposed in the heat insulating wall. Therefore, the circulation fan 23 can be installed without narrowing the depth of the freezer compartment 6.

  Note that the axial direction of the circulation fan 23 may be arranged vertically. Thereby, the circulating air blower 23 can be easily installed within the width in the height direction of the heat insulating wall 7 that forms the bottom wall of the refrigerator compartment 2. Further, the circulation fan 23 may be formed by a centrifugal fan. At this time, the centrifugal fan may be arranged with the intake side facing upward and the exhaust side facing left and right, so that the cold airflow is directed downward during or after the discharge of cold air.

  A temperature switching chamber blower 18 and a heater 16 are disposed at the rear of the temperature switching chamber 3. A temperature switching chamber discharge damper 37 (see FIG. 3) is provided at the lower left portion of the temperature switching chamber 3. The temperature switching chamber discharge damper 37 is disposed in the introduction ventilation path 15 (see FIG. 3), and the temperature switching chamber blower 18 is disposed in the upper part of the introduction ventilation path 15.

  When the temperature switching chamber discharge damper 37 is opened and the temperature switching chamber blower 18 is driven, cold air flows from the cooler 11 into the temperature switching chamber 3 through the introduction ventilation path 15. The amount of air flowing into the temperature switching chamber 3 from the introduction ventilation path 15 is adjusted by the opening / closing amount of the temperature switching chamber discharge damper 37. In addition to the heater 16, the temperature switching chamber 3 is provided with a panel heater (not shown) at the bottom.

  A temperature switching chamber return damper 38 is provided below the temperature switching chamber 3. The temperature switching chamber return damper 38 opens and closes the return passage 17 extending downward, and the air in the temperature switching chamber 3 returns to the cool air passage 31 via the return passage 17.

  Note that when the room temperature of the temperature switching chamber 3 is set to a high temperature, the air in the introduction ventilation path 15 and the return path 17 is lower in temperature than the air in the temperature switching chamber 3. Hot air rises in the temperature switching chamber 3, and a temperature switching chamber discharge damper 37 and a temperature switching chamber return damper 38 are provided in the lower part of the temperature switching chamber 3. For this reason, leakage of hot air from the temperature switching chamber 3 to the introduction ventilation path 15 and the return path 17 can be reduced.

  The air flowing through the return passage 17 is returned to the cooler 11 from an outlet 17a (see FIG. 3) provided in the middle of the cooler 11 in the vertical direction. The cool air flowing out of the freezer compartment 6 through the freezer compartment return port 22 returns to the lower part of the cooler 11. Further, the cold air flowing out from the vegetable compartment 5 and passing through the return passage 46 returns to the lower side of the cooler 11.

  Therefore, the cold air flowing out from each storage chamber is returned to the cooler 11 in a dispersed manner. For this reason, the frost by the cold air containing the water | moisture content which circulated through each store room and returned does not generate | occur | produce intensively, but disperse | distributes and generate | occur | produces to the cooler 11 whole. Thereby, clogging of the cold air flow due to frost is prevented, and a decrease in cooling performance of the cooler 11 can be prevented.

  In addition, the cold air that has flowed through the temperature switching chamber 3 with a small volume is cooled at the upper part of the cooler 11, and the cold air that has flowed through the cold room 3, the vegetable room 5, and the freezer room 6 with a large capacity is Cooled by. Therefore, the cold air flowing out from the temperature switching chamber 3 is not heat exchanged with the cooler 11 more than necessary, and the heat exchange efficiency of the cooler 11 can be improved.

  The cold air flowing out of the freezer compartment 6 through the freezer compartment return port 22 is guided between the end plates 11b on both sides. The cold air flowing out from the vegetable compartment 5 is guided to the entire left and right directions inside and outside the end plates 11b on both sides of the cooler 11 via a return passage 46 (see FIG. 5).

  Thereby, the heat exchange area of the cold air flowing out from the vegetable compartment 5 becomes larger than the heat exchange area of the cold air flowing out from the freezer compartment 6. Therefore, the low temperature cold air returning from the freezer compartment 6 is not cooled more than necessary, and the high temperature cold air returning from the vegetable compartment 5 is cooled by the entire cooler 11 so that the heat exchange efficiency of the cooler 11 can be further improved.

  Since the temperature switching chamber 3 may be maintained at the freezing temperature, the end plate 11 b is provided with a notch (not shown) at a position facing the outlet 17 a of the return passage 17. Thereby, the cold air that has flowed out of the temperature switching chamber 3 can be guided between the end plates 11b on both sides to disperse the cold air. Therefore, the condensation of the cooler 11 can be dispersed and clogging can be further prevented.

  FIG. 16 is a cold air circuit diagram showing the flow of cold air in the refrigerator 1. The freezer compartment 6, the refrigerator compartment 2, and the temperature switching chamber 3 are each arranged in parallel. The ice making room 4 is arranged in series with the freezer room 6, and the vegetable room 5 is arranged in series with the refrigerator room 2. The cold air generated by the cooler 11 is sent to the ice making chamber 4 by driving the freezer blower 12. The cold air sent to the ice making room 4 flows through the ice making room 4 and the freezing room 6, flows out from the freezing room return port 22, and returns to the cooler 11. As a result, the ice making chamber 4 and the freezing chamber 6 are cooled.

  When the refrigerating blower 23 synchronized with the refrigerating room damper 20 is driven by opening the refrigerating room damper 20, negative pressure is uniformly applied to the refrigerating room 2 and the chilled room 21. Thereby, the cold air branched on the exhaust side of the freezer blower 12 flows through the cold air passage 32. The cold air flowing through the cold air passage 32 is branched into the right passage 32a and the left passage 32b by the rib 71i. A part of the cold air passing through the right passage 32a is discharged to the chilled chamber 21 through the discharge ports 101a and 101b. The cold air flowing through the chilled chamber 21 flows out from the return ports 2d and 2e and a part of the return port 2f.

  Moreover, the cold air | gas which distribute | circulates the right channel | path 32a and the left channel | path 32b is discharged to the refrigerator compartment 2 through the discharge ports 71m and 71n. The cool air discharged to the refrigerator compartment 2 cools the stored items in the refrigerator compartment 2 and cools the stored items in the accessory storage chamber 102 and the tank chamber 103, and flows out from the return ports 2d, 2e, and 2f.

  At this time, the return ports 2d, 2e, and 2f are provided in a wide range from the vicinity of the inflow portion 32c below the cold air passage 32 to the vicinity of the side wall 2g of the refrigerator compartment 2. For this reason, the cool air descending from the discharge ports 71m and 71n is guided to the return ports 2d, 2e, and 2f in a state where the cool air spreads left and right. As a result, the inside of the refrigerator compartment 2 including the lower left part can be sufficiently circulated to cool the inside of the refrigerator compartment 2 uniformly.

  The cold air flowing through the right passage 32a and the left passage 32b and the cold air led from the discharge ports 71m and 71n to the return ports 2d, 2e and 2f are transmitted to the member 72. Since the member 72 is made of a good heat conductor, cold heat is uniformly emitted from a wide range over the plurality of storage shelves 41. Thereby, the inside of the refrigerator compartment 2 is cooled more uniformly by indirect cooling.

  The cold air that has flowed out of the return ports 2d, 2e, and 2f passes through the communication passage 34 via the circulation blower 23 and flows into the vegetable compartment 5 from the inlet 104. At this time, since the inflow port 104 is provided above the vegetable compartment 2, the pressure loss of the cold air led to the inflow port 104 by the communication path 34 can be reduced.

  The cold air flowing into the vegetable compartment 5 flows through the vegetable compartment 5 and returns to the cooler 11 via the return passage 46. Thereby, the inside of the refrigerator compartment 2 and the vegetable compartment 5 is cooled, and if it becomes preset temperature, the refrigerator compartment damper 20 will be closed and the circulation air blower 23 will be stopped.

  The cold air branched on the exhaust side of the freezer compartment fan 12 flows into the temperature switching chamber 3 via the temperature switching chamber discharge damper 37 by driving the temperature switching chamber blower 18. The cold air that has flowed into the temperature switching chamber 3 flows through the temperature switching chamber 3, flows out of the temperature switching chamber return damper 38, and returns to the cooler 11 through the return passage 17. Thereby, the inside of the temperature switching chamber 3 is cooled.

  As described above, the temperature switching chamber 3 can switch the room temperature by a user's operation. The operation modes of the temperature switching chamber 3 are wine (8 ° C.), refrigeration (3 ° C.), chilled (0 ° C.), soft freezing (−8 ° C.), and freezing (−15 ° C.) depending on the temperature zone. Provided.

  Thus, the user can store the refrigerated product at a desired temperature by refrigeration or refrigeration. The room temperature can be switched by varying the amount of opening of the temperature switching chamber discharge damper 37. For example, when switching from a freezing room temperature to a refrigerated room temperature, the heater 16 or a panel heater (not shown) may be energized to raise the temperature. Thereby, it can switch to desired room temperature rapidly.

  By energizing the heater 16 and the panel heater (not shown), the room temperature of the temperature switching chamber 3 can be switched from the low temperature side where the stored items are cooled and stored to the high temperature side higher than normal temperature. Thereby, temporary heat insulation, warm cooking, etc. of the cooked heated food can be performed.

  Since the growth temperature of the main food poisoning bacteria is 30 ° C. to 45 ° C., the indoor temperature on the high temperature side is preferably set to 50 ° C. or more in consideration of the tolerance of the heater capacity, the temperature distribution in the temperature switching chamber 3, and the like. Thereby, propagation of food poisoning bacteria can be prevented.

  Moreover, since the heat-resistant temperature of the general resin parts used for a refrigerator is 80 degreeC, when the room temperature of a high temperature side shall be 80 degrees C or less, it can implement | achieve cheaply. In addition, in order to sterilize food poisoning bacteria, for example, in the case of enterohemorrhagic E. coli (pathogenic E. coli O157), heating at 75 ° C. for 1 minute is required. Therefore, it is more desirable to set the indoor temperature on the high temperature side to 75 ° C. to 80 ° C.

The following are test results on sterilization of food poisoning bacteria at 55 ° C. In the initial state, E. coli 2.4 × 10 ³ CFU / mL, Staphylococcus aureus 2.0 × 10 ³ CFU / mL, Salmonella 2.1 × 10 ³ CFU / mL, Vibrio parahaemolyticus 1.5 × 10 ³ CFU / ML, Cereus 4.0 × 10 ³ CFU / mL. This test sample was heated from 3 ° C. to 55 ° C. over 40 minutes, kept at 55 ° C. for 3.5 hours, then returned from 55 ° C. to 3 ° C. over 80 minutes, and the amount of each bacterium was examined again. As a result, all the bacteria were reduced to a level of 10 CFU / mL or less (not detected). Therefore, even if the set temperature on the high temperature side of the temperature switching chamber 3 is 55 ° C., there is a sufficient sterilization effect.

  According to the present embodiment, the return ports 2d, 2e, and 2f provided in the lower part of the refrigerator compartment 2 are provided from the vicinity of the inflow portion 32c in the lower part of the cold air passage 32 (inflow passage) to the vicinity of the side wall 2g of the refrigerator compartment 2. As a result, the cold air that has flowed into the refrigerator compartment 2 from the discharge ports 71m and 71n spreads in a wide range from side to side and is guided to the return ports 2d, 2e, and 2f. Therefore, the cool air is sufficiently circulated in the refrigerator compartment 2 so that the inside of the refrigerator compartment 2 can be uniformly cooled.

  Further, the cool air can be smoothly flowed into the communication passage 34 (outflow passage) from the return ports 2d, 2e, and 2f by the cool air return portion 34a extending to the left and right. Thereby, the increase in pressure loss can be suppressed. Moreover, since the cold return part 34a is formed in the up-down direction at a height substantially matching the chilled chamber 23, an increase in pressure loss can be further suppressed.

  Although the inflow part 32c may be arranged at the center in the left-right direction of the refrigerator compartment 2, it is more desirable to arrange it in the right or left direction as in this embodiment. Accordingly, return ports 2d, 2e, and 2f are provided in a wide range extending from the vicinity of the inflow portion 32c to the left and right side walls 2g on the side away from the inflow portion 32c, and the cold air spreads in a wider range so that the inside of the refrigerator compartment 2 is further expanded It can cool uniformly.

  Further, since the communication path 34 extends downward along the side wall 2g, if the vertical widths of the return ports 2f, 2e, and 2d are the same, the flow rate of the cold air flowing out from the return port 2d close to the side wall 2g due to suction of the communication path 34 is increased. Become more. However, since the vertical width becomes smaller in the order of the return ports 2f, 2e, and 2d, the cold air uniformly flows out from the return ports 2f, 2e, and 2d.

  Therefore, the amount of cool air sucked to the vicinity of the side wall 2g in the refrigerator compartment 2 is not increased, and the inside of the refrigerator compartment 2 can be cooled more uniformly. In particular, since the vertical width of the return port 2f is larger than the return ports 2e and 2d, a sufficient amount of cold air circulation on the left side in the refrigerator compartment 2 can be ensured. When the amount of cool air flowing out from the return port 2d is large, the flow rate may be adjusted by making the width in the left-right direction narrower than the return ports 2f and 2e. Further, the same effect can be obtained by reducing the number of return ports 2d, 2e, 2f or using only the return port 2d and adjusting the outflow amount of cold air by making the opening area of the discharge port 71m smaller than that of the discharge port 71n. Can do.

  Further, since the return ports 2d, 2e, and 2f are divided, it is possible to prevent foreign matter from entering the communication path 34. The return ports 2d, 2e, and 2f may be connected to form a single opening. At this time, the return port may be formed in a trapezoidal shape or a triangle, for example, and the vertical width of the return port may be made smaller at a position closer to the side wall 2g than at a position away from the side wall 2g.

  Moreover, since the member 72 that discharges the cold heat into the refrigerating chamber 2 is provided across the plurality of storage shelves 41 and the discharge ports 71m and 71n are arranged around the member 72, the return port 2d from a wide range around the member 72, Cold air is guided to 2e and 2f. Therefore, the cold air in the refrigerator compartment 2 can be circulated more widely.

  In addition, the cooler 11 is arranged behind the freezer compartment 6 disposed between the refrigerator compartment 2 and the vegetable compartment 5 in the same direction as the inflow portion 32c, and the communication path 34 is arranged on the side of the cooler 11. Therefore, the depth of the freezer compartment 6 can be ensured widely. Therefore, the volumetric efficiency of the refrigerator 1 can be further improved.

  In addition, since the circulation blower 23 is provided in the communication passage 34 that allows the refrigerator compartment 2 and the vegetable compartment 5 to communicate with each other, a negative pressure is uniformly applied in the refrigerator compartment 2 to further uniform the indoor temperature of the refrigerator compartment 2. it can. Moreover, since a positive pressure is added to the vegetable compartment 5, the door of the vegetable compartment 5 can be easily opened with the storage case 43 which accommodated the store. The discharge ports 71m and 71n may be provided so as to be biased above the refrigerator compartment 2. Even in this case, the temperature in the refrigerator compartment 2 can be made uniform by releasing cold heat from the member 42 to a wide range.

  Next, FIG. 17 has shown side surface sectional drawing of the refrigerator of 2nd Embodiment. For convenience of explanation, the same reference numerals are assigned to the same parts as those in the first embodiment shown in FIGS. The present embodiment is different from the first embodiment in the arrangement of the circulation blower 23 arranged in the communication path 34. Other parts are the same as those in the first embodiment.

  The circulation fan 23 is composed of an axial fan, and is arranged vertically in the axial direction. Thereby, the circulation fan 23 overlaps with the heat insulation wall 8 which comprises the upper wall of the vegetable compartment 5 in front projection, and the circulation fan 23 can be easily installed in the width | variety of the height direction of the heat insulation wall 8. FIG. When the circulation fan 23 is driven to open the refrigerator compartment damper 20, the refrigerator compartment 2 becomes negative pressure, and the cold air is discharged to the refrigerator compartment 2 through the cold air passage 32. The cold air flowing through the refrigerator compartment 2 flows into the vegetable compartment 5 through the communication passage 34. The cold air flowing through the vegetable compartment 5 is guided to the cooler 11 via the return passage 46.

  Note that, as in the first embodiment, the circulation blower 23 may be inclined. At this time, if the circulation blower 23 is disposed so as to be inclined so that the front becomes lower, the depth of the communication passage 34 can be narrowed and the volume efficiency of the refrigerator 1 can be further improved. Further, when the communication path 34 is arranged in front of the exhaust side of the circulation blower 23, the communication path 34 can be arranged in a thick heat insulating wall behind the low temperature freezer compartment 6. Therefore, the circulation fan 23 can be installed without narrowing the depth of the freezer compartment 6.

  According to the present embodiment, as in the first embodiment, the return ports 2d, 2e, and 2f provided in the lower part of the refrigerator compartment 2 are arranged in the side wall of the refrigerator compartment 2 from the vicinity of the inflow portion 32c in the lower part of the cold air passage 32 (inflow passage). It is provided over the vicinity of 2 g. As a result, the cold air that has flowed into the refrigerator compartment 2 from the discharge ports 71m and 71n spreads in a wide range from side to side and is guided to the return ports 2d, 2e, and 2f. Therefore, the cool air is sufficiently circulated in the refrigerator compartment 2 so that the inside of the refrigerator compartment 2 can be uniformly cooled. Further, the cool air can be smoothly flowed into the communication passage 34 (outflow passage) from the return ports 2d, 2e, and 2f by the cool air return portion 34a extending to the left and right. Thereby, the increase in pressure loss can be suppressed.

  In the first and second embodiments, the return ports 2d, 2e, and 2f are provided on the back surface of the refrigerator compartment 2, but the cool air return portion 34a is extended in the heat insulating wall 7 by being provided at the rear portion of the heat insulating wall 7. Also good. As a result, a return opening having a large opening area is also arranged in the accessory storage chamber 102, and the cold air can be circulated more widely in the refrigerator compartment 2. At this time, it is more preferable to provide a wide space between the small case in the small item storage chamber 102 and the heat insulating material 107 to form a cold air passage for guiding the cold air to the return port 2 f at the rear part of the small item storage chamber 102.

  INDUSTRIAL APPLICABILITY The present invention can be used for all refrigerators that cool the inside of a refrigerator by circulating cold air.

The front view of the refrigerator of 1st Embodiment of this invention The front view of the state which opened the door of the refrigerator of 1st Embodiment of this invention Front sectional view of the refrigerator according to the first embodiment of the present invention. Side surface sectional drawing of the refrigerator of 1st Embodiment of this invention. Side surface sectional drawing of the refrigerator of 1st Embodiment of this invention. Side surface sectional drawing of the refrigerator of 1st Embodiment of this invention. Partial enlarged view of FIG. Top sectional drawing of the refrigerator of 1st Embodiment of this invention Enlarged view of part H in FIG. The front view of the cooling panel of the refrigerator of 1st Embodiment of this invention The side view of the cooling panel of the refrigerator of 1st Embodiment of this invention The rear view of the cooling panel of the refrigerator of 1st Embodiment of this invention DD sectional view of FIG. Enlarged view of part F in FIG. Enlarged view of part G in FIG. Cold air circuit diagram of the refrigerator of the first embodiment of the present invention Side surface sectional drawing of the refrigerator of 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigerated room 2d, 2e, 2f Return port 3 Temperature switching room 4 Ice making room 5 Vegetable room 6 Freezer room 11 Cooler 12 Freezer room fan 21 Chilled room 23 Circulating fan 31, 32 Cold air passage 32a Right passage 32b Left passage 32c Inflow part 34 Communication path 34a Cold air return part 70 Cooling panel 71 Panel base 71m, 71n Discharge port 72 Member 73, 74 End plate 102 Small storage chamber 103 Tank chamber

Claims (5)

  A storage chamber for storing stored items, a cooler for generating cold air, an inflow passage through which cool air flowing from the cooler into the storage chamber via a discharge port passes, and outflow from the storage chamber via a return port An outflow passage through which cool air passes, and the return port is provided in the lower portion of the storage chamber from the vicinity of the lower portion of the inflow passage to the vicinity of the side wall of the storage chamber, and has a cold air return portion extending left and right facing the return port. A refrigerator provided in the upper part of the outflow passage.   2. The refrigerator according to claim 1, wherein the lower portion of the inflow passage is arranged to be biased to one of the left and right sides, and the side wall is disposed on a side away from the lower portion of the inflow passage.   The outflow passage extends downward along the side wall from the cold air return portion, and the vertical width of the return port is smaller at a position closer to the side wall than at a position away from the side wall. Or the refrigerator of Claim 2.   The refrigerator according to any one of claims 1 to 3, wherein a plurality of the return openings are divided into left and right portions.   A member comprising a heat conductive plate that is disposed at least on the back side of the storage chamber and discharges cold heat to the storage chamber over a plurality of shelves, and the discharge port is disposed around the member. The refrigerator in any one of Claims 1-4.

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