JP5265237B2 - refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of making the internal temperature of a storage chamber uniform. <P>SOLUTION: The refrigerator 1 includes the storage chamber 2 for storing a storing object, a cooler 11 for generating cold air, an inflow passage 32 into which cold air flows from the cooler 11 to the storage chamber 2 via discharge ports 71m and 71n, and an outflow passage 34 from which cold air flows out from the storage chamber 2 via a first return port 2h. The outflow passage 34 includes a back face cold air return part 34c extending vertically on the back face side and a bottom wall cold air return part 34b extending to the right and left near the back face in a bottom wall 7 of the storage chamber 2. The first return port 2h is provided to the bottom wall cold air return part 34b. <P>COPYRIGHT: (C)2010,JPO&amp;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.

  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. Thereby, the refrigerator compartment is 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, there is a problem that it is difficult for cold air to reach the lower left part of the refrigerator compartment, and the refrigerator compartment cannot be cooled uniformly. Moreover, there also existed a problem that ventilation efficiency was bad and cooling efficiency was also low.

  An object of this invention is to provide the refrigerator which can improve a ventilation efficiency and cooling efficiency while being able to cool a storage chamber uniformly.

  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, In the refrigerator having an outflow passage through which the cold air flowing out from the storage chamber through the first return port passes, the outflow passage is in the vicinity of the back surface in the bottom wall of the storage chamber and a back cold air return portion extending vertically on the back surface side And a bottom wall cold air return portion extending left and right, and a first return port is provided in the bottom wall cold air return portion.

  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 that has flowed into the storage chamber flows through the storage chamber and flows out from the first return port provided in the bottom wall of the storage chamber. The cold air flowing out from the first return port circulates through the bottom wall cold air return portion extending left and right in the bottom wall, circulates through the back cold air return portion provided on the back surface of the refrigerator, and returns to the cooler.

  In the refrigerator configured as described above, the second return port communicating with the outflow path may be provided on the rear surface of the storage chamber, and the back cold air return portion and the second return port may be provided in one of the left and right directions of the storage chamber. In addition to being arranged in a biased manner, the inflow passage is disposed behind the storage chamber, and the first return port is disposed in front of the inflow passage or on the opposite side of the rear cool air return portion with respect to the inflow passage. It is said.

  According to this configuration, the cold air flowing through the storage chamber flows out from the second return port disposed in a biased direction in the left-right direction of the storage chamber, and is provided in front of the inflow passage or on the opposite side of the second return port. It flows out from 1 return port. The cold air flowing out from the first return port flows through the bottom wall cold air return portion, merges with the cold air flowing out from the second return port, and returns to the cooler via the back surface cold air return portion.

  Moreover, the present invention is characterized in that, in the refrigerator having the above-described configuration, the lower portion of the inflow passage is arranged to be biased to the opposite side of the back side cold air return portion.

  In the refrigerator having the above-described configuration, the second return port is disposed 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 extends to the left and right facing the second return port. A cold air return portion is provided in the outflow passage. According to this configuration, the second 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 in the outflow passage is formed to extend from side to side facing the second return port. Is done. The cold air flowing out from the second return port circulates through the cold air return portion extending left and right, and returns to the cooler via the back cold air return portion.

  Further, the present invention provides the refrigerator having the above-described configuration, in which the back cold air return portion is arranged to be biased to one side in the left-right direction of the storage chamber, the inflow passage is arranged behind the storage chamber, and the first return port is the first return port. It is characterized by being arranged in the vicinity of the back cool air return portion and in front of the inflow passage or on the opposite side of the back cool air return portion with respect to the inflow passage.

  According to this configuration, the cold air flowing through the storage chamber flows out from the first return port in the vicinity of the rear cool air return portion arranged in a biased direction in the left-right direction of the storage chamber, and the front or rear cool air return portion of the inflow passage. It flows out from the first return port provided on the opposite side.

  In the refrigerator having the above-described configuration, the bottom wall includes a first flat surface portion provided on a peripheral portion, and a second flat surface portion provided on the inner side of the first flat surface portion and lower than the first flat surface portion. And the first return port is provided above the second plane part.

  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 in the vicinity of 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 outflow passage through which the cool air flowing out from the storage chamber flows has a back surface cold air return portion that extends vertically on the back surface side, and a bottom wall cold air return portion that extends to the left and right in the vicinity of the back surface in the bottom wall of the storage chamber. And since the 1st return port was provided in the bottom wall cold air return part, the 1st return port is freely arranged according to the position of the discharge port irrespective of arrangement of the inflow passage through which the cool air discharged into the storage room flows. be able to. Therefore, the cool air can be sufficiently circulated in the storage chamber to uniformly cool the storage chamber. In addition, the air blowing efficiency can be improved and the cooling efficiency can be improved.

  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. Accordingly, the 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 (second return ports) 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 includes a back cold air return portion 34 c disposed on the back surface of the refrigerator 1 and a bottom wall cold air return portion 34 b provided on the heat insulating wall 7. The back cold air return portion 34c has a cold air return portion 34a at the top, and extends downward from the cold air return portion 34a. The cold air return portion 34a is provided to extend from side to side facing the return ports 2d, 2e, and 2f. As will be described in detail later, the bottom wall cold air return portion 34b extends in the left and right directions in the heat insulating wall 7 and communicates with the cold air return portion 34a.

  An inflow port 104 that opens to the vegetable compartment 5 is provided at the lower end of the communication path 34. A circulation fan 23 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 FIGS. 3 and 16). 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.

  FIG. 6 is an enlarged view of the main part of FIG. The heat insulating wall 7 is provided with a first flat surface portion 7a at a peripheral portion, and a concave portion 7d is provided inside the first flat surface portion 7a. A second flat surface portion 7b lower than the first flat surface portion 7a is formed by the concave portion 7d via the inclined surface 7c. A bottom wall cold air return portion 34b extending in the left-right direction is provided in the heat insulating wall 7 in the vicinity of the back surface of the refrigerator compartment 2.

  The inclined surface 7c is provided with a return port 2h (first return port) that opens to the bottom wall cold air return portion 34b. As a result, the return port 2h is arranged in front of the cold air passage 32, and the cold air in the refrigerator compartment 2 flows under the storage case 43 through the recess 7d and is guided to the return port 2h.

  The heat insulation layer around the bottom wall cold air return portion 34 b has a predetermined thickness secured by the heat insulation wall 7 and the heat insulation material 107. Thereby, it is possible to prevent condensation due to a temperature difference between the cold air flowing through the front portion 31a of the cold air passage 31 and the cold air passage 32 and the cold air flowing through the bottom wall cold air return portion 34b.

  The heat insulating material 107 is filled and foamed simultaneously with the foam heat insulating material 1c (see FIG. 4), and a wall made of a resin molded product facing the heat insulating material 107 is provided in order to obtain a space for the bottom wall cold air return portion 34b. A part of the heat insulating material 107 facing the bottom wall cold air return part 34b may be formed of foamed polystyrene or the like, and an assembly in which the bottom wall cold air return part 34b and part of the heat insulating material 107 are integrally formed may be provided.

  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 side of the left-right direction of a refrigerator main body, and the back surface cold air return of the communicating path 34 is provided in the side (temperature switching chamber 3 side) different from the cooler 11. A portion 34c is provided. 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.

  Thereby, the surface area of the member 72 can be increased, and the cooling and releasing efficiency can be improved. In addition, the moisture retention effect can be obtained by holding condensed water on the bead 72b, and the illumination effect can be improved by irregular reflection of light by the bead 72b. These can obtain the same effect as long as the surface of the member 72 has an uneven shape.

  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 a cold air introduction part 71b (see FIG. 3).

  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 in the vicinity of 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. 16 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 (see FIG. 3) open to the front surface 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 portion 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. 17 shows an enlarged view of the main part of FIG. The bottom wall cold air return portion 34b provided on the heat insulating wall 7 is disposed below the cold air return portion 34a and communicates with the cold air return portion 34a. The cold air flowing out from the return port 2h (see FIG. 6) passes through the bottom wall cold air return portion 34b and is guided to the back cold air return portion 34c through the cold air return portion 34a.

  FIG. 18 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 2h, 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. A return port 2 h is provided in front of the inflow portion 32 c of the cold air passage 32. For this reason, the cool air descending from the discharge ports 71m and 71n is guided to the return ports 2h, 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, 71n to the return ports 2h, 2d, 2e, 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 2h, 2d, 2e, and 2f passes through the communication passage 34 and flows into the vegetable compartment 5 from the inflow port 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. Further, the return ports 2h, 2d, 2e, and 2f ensure a wide opening area, and the pressure loss can be reduced. By these, ventilation efficiency can be improved.

  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 rear cold air return portion 34c in which the communication passage 34 (outflow passage) through which the cold air flowing out from the refrigerating chamber 2 circulates up and down extends on the back surface side, and the bottom wall extending left and right in the vicinity of the back surface in the heat insulating wall 7 Since the cool air return portion 34b and the return port 2h (first return port) are provided in the bottom wall cool air return portion 34b, the arrangement of the cool air passage 32 (inflow passage) through which the cool air discharged into the refrigerating chamber 2 flows is arranged. Regardless, the return port 2h can be freely arranged according to the positions of the discharge ports 71m and 71n. 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 return ports 2d, 2e, 2f and the back side cold air return portion 34c provided on the back surface of the refrigerating room 2 are arranged so as to be biased to one of the left and right directions of the refrigerating room 2, and the cold air passage 32 is arranged behind the refrigerating room 2. Since the return port 2h is disposed in front of the cool air passage 32, the cool air descending from the discharge ports 71m and 71n is guided to the return ports 2h, 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.

  At this time, the discharge ports 71m and 71n may be provided only at one place to several places above or on the side of the member 72. Even if it does in this way, cold air circulation is performed sufficiently and the stored item of the refrigerator compartment 2 including the chilled chamber 21 and the accessory storage chamber 102 can be cooled uniformly. Furthermore, cooling can be performed more uniformly by releasing cold heat from the member 72.

  If the return port 2h is arranged on the opposite side of the back side cold air return portion 34c with respect to the inflow portion 32c of the cold air passage 32, the cold air can be guided to the communication passage 34 in a state of spreading in the left-right direction. Therefore, the inside of the refrigerator compartment 2 can be made more uniform. In particular, the effect is great when the inflow portion 32c is disposed near the center in the left-right direction.

  Since the bottom wall cold air return portion 34b is provided in the heat insulating wall 7 in the vicinity of the inclined surface 7c on the back side, the region of the heat insulating layer protruding toward the refrigerator compartment 2 can be reduced. Thereby, the fall of the internal volume can be suppressed. Furthermore, since the return port 2h and the bottom wall cold air return portion 34b are provided only in front of the cool air passage 32 in the vicinity of the inflow portion 32c, the region of the heat insulating layer protruding toward the refrigerator compartment 2 can be further reduced.

  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, the return ports 2d, 2e, and 2f can be provided in a wide range on the left and right sides extending from the vicinity of the inflow portion 32c to the side wall 2g on the side away from the inflow portion 32c. The cold air can spread over a wider range, and the inside of the refrigerator compartment 2 can be cooled more uniformly.

  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.

  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. Moreover, since the return port 2h is further provided, the cold air can be circulated in a wider area.

  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.

  The return port 2h is provided on the inclined surface 7c above the second flat surface portion 7b. For this reason, even if the user mistakenly drops a liquid such as water in the recessed portion 7d, the liquid can be prevented from entering the communication path 34. As shown in FIG. 19, when the return port 2h is provided in the first flat surface portion 7a, it is possible to further prevent the liquid from entering the communication path 34.

  Next, FIG. 20, FIG. 21 is the front view and side sectional drawing which show the principal part 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. In the present embodiment, the back side cold air return portion 34 c of the communication path 34 is provided with a cold air adjustment portion 34 e extending between the cold air return portion 34 a and the circulation fan 23. Other parts are the same as those in the first embodiment.

  The cold air adjustment unit 34e is disposed below the cold air return unit 34a, and communicates with the cold air return unit 34a through the opening 34d. The bottom wall cold air return part 34b in which the return port 2h opens communicates with the lower surface of the cold air adjustment part 34e. Return ports 2 d and 2 e are opened in the cold air return portion 34 a so as to face the chilled chamber 21. The opening area of the return port 2e far from the opening 34d is larger than that of the return port 2d near the opening 34d.

  Cold air discharged from the discharge ports 71n and 71m flows through the refrigerator compartment 2 and flows out from the return ports 2h, 2d, and 2e. The cold air flowing out from the return port 2h flows through the bottom wall cold air return portion 34b and the cold air adjustment portion 34e of the communication passage 34 and is guided to the vegetable compartment 5. The cold air flowing out from the return ports 2d and 2e flows through the cold air return portion 34a and the cold air adjustment portion 34e of the communication passage 34 and is guided to the vegetable compartment 5.

  According to the present embodiment, the amount of cold air flowing from the cold air return portion 34a to the cold air adjusting portion 34e is adjusted by the opening 34d. The amount of cool air passing through the return port 2h and the amount of cool air passing through the return ports 2d and 2e can be maintained in a desired balance, and the temperature in the refrigerator compartment 2 can be made more uniform.

  The cool air return section 34a serves as a surging tank. For this reason, while being able to reduce the driving | running | working sound of the circulation air blower 23, the flow of the cold air which passes along the return ports 2d and 2e is stabilized, and the load of the circulation air blower 23 can be stabilized. The return port 2h may be divided in the same manner as the return ports 2d and 2e.

  Next, FIG. 22 has shown side surface sectional drawing of the refrigerator of 3rd Embodiment. For convenience of explanation, the same reference numerals are given 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 rear cold air return portion 34c in which the communication passage 34 (outflow passage) through which the cold air flowing out from the refrigerator compartment 2 flows up and down on the rear surface side, Since the bottom wall cold air return portion 34b extending in the left and right directions in the vicinity of the back surface is provided in the return wall 2h (the first return port) in the bottom wall cold air return portion 34b, the cold air flowing into the refrigerator compartment 2 flows through the cold air Regardless of the arrangement of the passage 32 (inflow passage), the return port 2h can be freely arranged according to the positions of the discharge ports 71m and 71n. 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. In addition, the air blowing efficiency can be improved and the cooling efficiency can be improved.

  Further, the return ports 2d, 2e, 2f and the back side cold air return portion 34c provided on the back surface of the refrigerating room 2 are arranged so as to be biased to one of the left and right directions of the refrigerating room 2, and the cold air passage 32 is arranged behind the refrigerating room 2. Since the return port 2h is disposed in front of the cool air passage 32, the cool air descending from the discharge ports 71m and 71n is guided to the return ports 2h, 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.

  Next, FIGS. 23 and 24 show a front view of a refrigerator according to the fourth embodiment and a side cross-sectional view showing a main part of a cross section passing through the accessory storage chamber 102. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS.

  In the present embodiment, the cold air passage 32 extends upward from the refrigerator compartment damper 20, and discharge ports 71 n and 71 n (see FIG. 3) are omitted, and a discharge port 76 is formed at the upper end of the cold air passage 32. A circulation fan 23 is disposed between the refrigerator compartment damper 20 and the discharge port 76, and a return port 2 a through which cold air from the refrigerator compartment 2 flows out is provided at the lower back of the chilled chamber 21. Other parts are the same as those in the first embodiment.

  The discharge port 76 is provided to be biased leftward, and the return port 2a is provided to be biased rightward. The discharge port 76 has a left-side vertical width W1 that is farther from the return port 2a than a right-side vertical width W2 near the return port 2a. A communication passage 34 extending downward is led out to the return port 2a. A cold air return portion 34 a is formed in the upper part of the communication path 34. In front of the cold air passage 32, a bottom wall cold air return portion 34b extending in the lateral direction and communicating with the cold air return portion 34a is disposed, and a return port 2h is provided in the bottom wall cold air return portion 34b. The communication path 34 opens the inflow port 104 to the vegetable compartment 5 and connects the refrigerator compartment 2 and the vegetable compartment 5.

  According to this embodiment, the discharge port 76 which discharges cold air to the refrigerator compartment 2 is provided only in the upper rear of the refrigerator compartment 2 (storage compartment). Thereby, the drying of the stored matter by the damage of the stored matter by the dew condensation water which generate | occur | produces in the discharge port 76 vicinity, or a cold air | atmosphere can be reduced. Further, even if the discharge port 76 is provided only at one place, the return ports 2a and 2h are arranged apart from each other in the left and right directions. Therefore, as in the first embodiment, the inside of the refrigerator compartment 2 including the lower left part can be sufficiently circulated to cool the refrigerator compartment 2 uniformly.

  Further, the return port 2a is arranged at the lower part of the refrigerator 2 so as to be biased to one of the left and right sides, and the discharge port 76 has a larger vertical width W1 at a portion away from the vertical width W2 at a portion near the return port 2a. For this reason, a lot of cool air from the discharge port 76 toward the return port 2a spreads to a position away from the return port 2a, and the temperature distribution in the refrigerator compartment 2 can be made more uniform.

  Next, FIG. 25 has shown the front view of the refrigerator of 5th Embodiment. For convenience of explanation, the same reference numerals are assigned to the same parts as those in the fourth embodiment shown in FIGS. In the present embodiment, discharge ports 101 a and 101 b that discharge cold air to the chilled chamber 21 are provided. Other parts are the same as in the fourth embodiment.

  According to this embodiment, the same effect as that of the fourth embodiment can be obtained. The chilled chamber 21 is provided with discharge ports 101a and 101b. However, since the chilled chamber 21 is composed of an isolation chamber, the temperature zone is different from that in the refrigerator compartment 2 outside the chilled chamber 21. For this reason, the discharge port 76 provided in the range which makes temperature distribution outside the isolation chamber uniform should just be provided only in the upper rear of the refrigerator compartment 2 (storage chamber).

  In the first to fifth embodiments, the return ports 2a, 2d, 2e, and 2f provided on the back surface of the refrigerator compartment 2 are omitted, and the region in the left-right direction of the bottom wall cold air return portion 34b is widened and left and right in that region. A plurality of return ports 2h may be provided. At this time, the passage connecting the bottom wall cold air return portion 34b to the cold air return portion 34a may be set to a substantially central portion in the left-right direction. Thereby, the cold air return part 34a becomes a pressure chamber, serves as a surge tank, and can approximate the left and right suction forces of the bottom wall cold air return part 34b. In addition, if the opening area of the return port 2h is increased as it is further left and right with respect to the passage, the suction amount can be made more uniform.

  Further, when the refrigerator has a relatively small internal volume, the circulation fan 23 may be omitted, and the cold air circulation using only the freezer compartment fan 12 may be performed. Thereby, the internal volume can be increased by the reduction of the heat insulating material. Further, by providing the return ports 2h, 2a, 2d, 2e, 2f, etc., it is possible to make the cold air circulation in the refrigerator compartment 2 uniform and improve the cooling efficiency.

  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 which passes along the tank chamber of the refrigerator of 1st Embodiment of this invention. Side surface sectional drawing which passes the accessory storage chamber of the refrigerator of 1st Embodiment of this invention. Detailed view of the main part of FIG. Side surface sectional drawing of the refrigerator compartment of the refrigerator of 1st Embodiment of this invention. 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. Side surface sectional drawing which passes along the chilled chamber of the refrigerator of 1st Embodiment of this invention. Detail view of the main part of FIG. Cold air circuit diagram of the refrigerator of the first embodiment of the present invention Side surface sectional drawing which shows arrangement | positioning of the other return port of the refrigerator of 1st Embodiment of this invention Front view of the refrigerator of the second embodiment of the present invention Side surface sectional drawing of the refrigerator of 2nd Embodiment of this invention. Side surface sectional drawing of the refrigerator of 3rd Embodiment of this invention. Front view of the refrigerator of the fourth embodiment of the present invention Side surface sectional drawing of the refrigerator of 4th Embodiment of this invention. Front view of the refrigerator of the fifth embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigerating room 2a, 2d, 2e, 2f, 2h 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 portion 34 Communication passage 34a Cold air return portion 34b Bottom wall cold air return portion 34c Rear cold air return portion 34d Cold air adjustment portion 70 Cooling panel 71 Panel base 71m, 71n Discharge port 72 Member 73, 74 End plate 102 Small storage chamber 103 Tank room

Claims (5)

A storage chamber for storing stored items; a cooler disposed below the storage chamber to generate cool air; an inflow passage through which cool air flowing from the cooler into the storage chamber through a discharge port passes; In the refrigerator having an outflow passage through which the cold air flowing out from the storage chamber through the first return port and the second return port passes, the outflow passage is biased to one side of the rear side of the storage chamber in the left-right direction. A back side cold air return portion extending up and down the side of the cooler through a second return port arranged on the side, and a back surface vicinity in the bottom wall of the storage chamber adjacent to the front of the inflow passage to the left and right A bottom wall cold air return portion that extends and communicates with the back cold air return portion, and the first return port is provided on the bottom wall cold air return portion so as to be opposite to the second return port in the left-right direction. Features a refrigerator. The refrigerator according to claim 1 , wherein a lower portion of the inflow passage is disposed to be opposite to the back side cold air return portion. Second return port is arranged at the bottom of the storage compartment over the side walls near the storage compartment from near the lower portion of said inlet passage, said bottom wall extending to the left and right at the side of the inlet passage facing the second return port The refrigerator according to claim 1 or 2 , wherein a cold air return portion connected to the cold air return portion is provided at an upper portion of the back cold air return portion . The bottom wall is provided at a peripheral portion, a first flat portion where a storage case is installed , a concave portion which is provided inside the first flat portion and has a second flat portion which is lower than the first flat portion on the bottom surface The refrigerator according to any one of claims 1 to 3 , wherein a first return port is provided on a back surface of the recess . 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 in the vicinity of the member. The refrigerator in any one of Claims 1-4 .

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