JP2009222240A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of keeping an uniform indoor temperature and suppressing damage by dew condensation water and drying by cold air, of stored objects. <P>SOLUTION: This refrigerator comprises a storage chamber 2 receiving the stored objects, a cooler 11 producing the cold air flowing in the storage chamber 2, a cold air pathway 32 in which the cold air from the cooler 11 is circulated along a wall surface of the storage chamber 2, a discharge opening 76 for discharging the cold air circulated in the cold air pathway 32 into the storage chamber 2, a plurality of shelves 41 disposed in the storage chamber 2 for loading the stored objects, and a member 72 disposed at a back face in the storage chamber 2, and composed of a heat good conductor releasing the cold into the storage chamber 2 over the shelves 41 of a plurality of stages, and the discharge opening 76 is formed only on an upper rear part of the storage chamber 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a refrigerator that sends cold air from a discharge port to a storage chamber through a cold air passage.

  A conventional refrigerator is disclosed in Patent Document 1. The refrigerator is provided with a refrigerator compartment at the top, and a plurality of outlets are provided on the periphery of the back of the refrigerator compartment. A return port through which cool air in the refrigerator compartment flows out is provided at the lower part of the refrigerator compartment. The cold air generated by the cooler is discharged from the discharge port into the refrigerator compartment, flows through the refrigerator compartment, and flows out from the return port. Thereby, the refrigerator compartment is cooled by forced convection. Since cold air is discharged from a plurality of outlets arranged in the peripheral part of the refrigerator compartment, the refrigerator compartment can be uniformly cooled.

JP 2002-147915 (pages 4-7, FIG. 2)

  Since the periphery of the discharge port that discharges cold air is maintained at a low temperature, dew condensation is likely to occur, and stored matter near the discharge port is easily damaged by the dew condensation water. In addition, the stored item near the discharge port is exposed to the cold air discharged and is easily dried. According to the conventional refrigerator, a plurality of discharge ports are provided in the peripheral portion of the back surface of the storage chamber, and thus there is a problem that a large amount of stored matter is generated due to damage due to condensed water or drying due to cold air.

  An object of this invention is to provide the refrigerator which can make indoor temperature uniform and can reduce the damage by the dew condensation water of a store thing, and the drying by cold air.

  In order to achieve the above object, the present invention provides a storage chamber for storing stored items, a cooler for generating cold air flowing into the storage chamber, and cold air from the cooler flowing along the wall surface of the storage chamber. A cooling air passage, a discharge port for discharging the cold air flowing through the cold air passage into the storage chamber, a plurality of placement shelves arranged in the storage chamber for placing stored items, and a rear surface of the storage chamber. And a member made of a good thermal conductor that discharges cold heat into the storage chamber over a plurality of stages of the mounting shelf, and the discharge port is arranged only at the upper rear of the storage chamber.

  According to this configuration, the cool air generated by the cooler flows through the cool air passage and is discharged into the storage chamber from the discharge port provided at the upper rear of the storage chamber. The cold air flows down and circulates in the storage chamber, and cools members provided in a wide range over a plurality of stages of mounting shelves. The storage chamber is cooled by cold air circulated through the chamber and cold heat released from a member made of a good heat conductor.

  In the refrigerator having the above-described configuration, the present invention provides a storage chamber for storing stored items, an isolation chamber provided separately from the storage chamber, a cooler for generating cool air flowing into the storage chamber, and the storage chamber A cool air passage through which cool air from the cooler circulates along the wall surface, a discharge port for discharging cool air through the cool air passage into the storage chamber outside the isolation chamber, and cold air through the cool air passage. An isolation chamber discharge port for discharging into the isolation chamber, a plurality of mounting shelves arranged in the storage chamber for mounting stored items, and a plurality of mounting shelves arranged on the back surface of the storage chamber And a member made of a good thermal conductor that discharges cold heat into the storage chamber, and the discharge port is disposed only at the upper rear of the storage chamber.

  According to this configuration, the cool air generated by the cooler flows through the cool air passage and is discharged from the isolation chamber discharge port to the isolation chamber, and is discharged from the discharge port provided at the upper rear of the storage chamber to the outside of the storage chamber. Is done. The cold air discharged from the isolation chamber discharge port cools the isolation chamber. The cool air discharged from the discharge port flows down and circulates in the storage chamber, and cools a member provided in a wide range over a plurality of stages of mounting shelves. The storage room outside the isolation room is cooled by the cold air circulated in the room and the cold heat released from a member made of a good heat conductor.

  Further, the present invention provides the refrigerator having the above-described configuration, in which a return port that causes the cool air returning from the storage chamber to the cooler to flow out of the storage chamber is arranged in the lower part of the storage chamber so as to be biased to one side in the left-right direction, and the discharge port Is characterized in that the vertical width of the portion separated in the left-right direction is larger than the vertical width of the portion close to the return port. According to this configuration, the cold air discharged into the storage chamber from the discharge port on the upper rear side of the storage chamber flows down and flows out from the return port arranged on the lower right part or the lower left part. The discharge port is formed with a narrow vertical width at a portion near the return port to reduce the discharge amount, and is formed with a wide vertical width at a portion away from the return port to increase the discharge amount.

  Moreover, the present invention is characterized in that, in the refrigerator having the above-described configuration, the discharge port is arranged in the left-right direction so as to be biased to the opposite side of the return port. According to this configuration, for example, the cool air discharged into the storage chamber from the discharge port arranged in the leftward direction at the upper rear flows out from the return port arranged in the rightward direction in the lower part.

  In the refrigerator having the above-described configuration, the present invention further includes a return passage through which the cold air flowing out from the return port circulates, and the cold air passage and the cooler are arranged on the same side as the discharge port, and the return passage Is arranged on the side of the cooler. According to this configuration, the cooler, the cool air passage, and the discharge port are arranged so as to be biased leftward, for example, and the cool air is guided from the cooler to the discharge port through the cool air passage. The return port and the return passage are arranged to be biased to the right, and the cold air flowing out from the return port flows through the return passage on the side of the cooler.

  Moreover, the present invention is characterized in that, in the refrigerator having the above-described configuration, the discharge port and the member are arranged apart from each other.

  According to the present invention, since the discharge port for discharging cool air is provided only in the upper rear of the storage chamber (outside of the isolation chamber if there is an isolation chamber in the storage chamber), the dew condensation water generated near the discharge port It is possible to reduce the drying of the stored item due to the damage of the stored item or the cold. In addition, since a member made of a good heat conductor is provided in the storage chamber, cold heat is uniformly discharged over a wide range from the member cooled by the cold air discharged from the discharge port. Therefore, the temperature distribution in the storage chamber can be made uniform.

  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.

  A first accessory storage chamber 21, a second accessory storage chamber 102, and a tank chamber 103, which are isolated chambers, are provided side by side at the lower part of the refrigerator compartment 2. The first accessory storage chamber 21 is provided with a return port 2a (see FIG. 3) described later. The second accessory storage chamber 102 is disposed in front of a cold air passage 32 (see FIG. 3) described later. The first and second accessory storage chambers 21 and 102 are provided with storage cases 43e and 43f (see FIGS. 5 and 6) for storing accessories such as eggs. In the tank chamber 103, a water tank 103a for ice making is detachably stored.

  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. 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 the side surfaces of the heat insulating walls 7 and 8 are opened before the foam heat insulating material 1c is filled, 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 ice making room 4, the freezing room 6, the vegetable room 5 and the temperature switching room 3 are provided with storage cases 43a, 43b, 43c and 43d (see FIG. 6) for storing stored items, respectively. The refrigerator compartment 2 is provided with a plurality of placement shelves 41 on which stored items are placed. A plurality of storage pockets 42 are provided on the door of the refrigerator compartment 2. Thereby, the usability of the refrigerator 1 is improved.

  The lowermost mounting shelf 41 is divided into a front part 41a and a rear part 41b, and the depth can be shortened by sliding the front part 41a rearward. When the front part 41a is slid and rotated together with the rear part 41b, a large storage space is obtained. Further, a gap through which cool air can flow is formed between each mounting shelf 41 and the cooling panel 70. A similar clearance is formed between the lowermost mounting shelf 41 and the cooling panel 70 when the front part 41a and the rear part 41b are erected by rotation.

  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 through which cool air flows is arranged behind the refrigerator compartment 2. The cold air passage 32 is formed by a cooling panel 70 having a member 72 made of a good heat conductor on the front surface. The cold air passage 32 extends upward from the refrigerator compartment damper 20, and a discharge port 76 is formed at the upper end. Between the refrigerator compartment damper 20 and the discharge port 76, a refrigerator compartment fan 23 comprising an axial fan is disposed. In addition, a return port 2 a through which the cold air from the refrigerator compartment 2 flows out is provided at the lower back of the first accessory storage chamber 21.

  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 cool air return chamber 34a (see FIG. 6) is formed in the upper part of the communication passage 34. 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.

  FIG. 5 shows a side sectional view through the second 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.

  Further, the refrigerator compartment blower 23 is disposed so as to be inclined so that the intake side is directed downward, the exhaust side is directed upward, and the rear is lowered. Thereby, even if the depth of the cold passage 32 is narrowed, the wide refrigeration room blower 23 can be stored without difficulty, and the efficiency of suction and discharge is not reduced. In addition, you may form the refrigerator compartment fan 23 with 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.

  The refrigerator compartment damper 20 is disposed at a position overlapping the heat insulating 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 depth of the refrigerator compartment 2 and the freezer compartment 6 can be increased.

  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. 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, the front portion 31a, and the back plate 6a. For this reason, the freezer compartment 6 is indirectly cooled efficiently, and the cooling efficiency is improved.

  The cooler 11 on the low temperature side of the refrigeration cycle exchanges heat with the air flowing through the cold air passage 31 to generate cold air. 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 rotating shaft 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. . Further, the cold air is supplied to the refrigerator compartment 2 and the vegetable compartment 5 through the cold passage 32 by driving the refrigerator compartment fan 23. 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.

  In FIG. 3 described above, the cooler 11 is arranged to be biased toward the ice making chamber 4, and the communication path 34 is arranged 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 refrigerating room blower 23, the refrigerating room damper 20, and the freezing room blower 12 are arranged side by side in the vertical direction so as to be biased in the same direction as the cooler 11. That is, the refrigerating room blower 23, the refrigerating room damper 20, and the freezing room blower 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.

  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 to be biased to the left side. 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 of the cold air passage 31 (see FIG. 5) are provided behind the vertical heat insulation wall 36 or on the left side of the vertical heat insulation wall 36 to release heat from the temperature switching chamber 3 to the cold air. It is preventing. Thereby, cooling efficiency can be improved more.

  FIG. 7 shows a cross-sectional view taken along line EE of FIG. FIG. 8 is a top sectional view of the refrigerator compartment 2. 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. The discharge port 76 is formed to open at the top of the member 72.

  The cooling panel 70 has a member 72 disposed on the front surface of the panel base 71. The member 72 is provided over the plurality of stages of mounting shelves 41 and covers a wide range in the horizontal and vertical directions of the refrigerator compartment 2. 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.

  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.

  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. A discharge port 76 is opened above the member 72, and the surface metal surface 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 side cross-sectional view of the cooling panel 70 in a cross section passing through the cold air passage 32. The panel base 71 has a lattice-like skeleton 71a. The cooling panel 70 can have sufficient strength by the skeleton 71a. A lower portion of the cooling panel 70 is filled with a heat insulating material 71c between lattices formed by the skeleton 71a.

  In the upper part of the cooling panel 70, the heat insulating material is not buried between the lattices by the skeleton 71 a on the front side of the cold air passage 32. Thereby, the cold air flowing through the cold air passage 32 directly hits the back surface of the member 72. In addition, the thermal conductivity of the cooling panel 70 (the thermal conductivity in the normal direction of the panel surface) is higher in the upper part than in the lower part.

  For this reason, the surface temperature of the lower part in which the cool air from the cooler 11 flows in the cooling panel 70 does not drop compared to the upper part, and the surface temperature of the cooling panel 70 becomes uniform. Therefore, the temperature unevenness in the refrigerator compartment 2 can be reduced. In addition, condensation, frost formation, icing, and the like at the lower part of the cooling panel 70 can be reduced, and dripping of a large amount of water droplets due to the abnormal occurrence of many of these can be prevented.

  In addition, the difference of the thermal conductivity for every site | part of the cooling panel 70 can be easily set with 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, ribs 71e are formed on the rear surface of the panel base 71 so as to surround the outer periphery and to form the side walls of the cold air passage 32. The rib 71e contacts the inner box 1b (see FIG. 4) to form the cool air passage 32.

  Synthetic resin end covers 73 and 74 are fitted and attached to the upper and lower ends of the cooling panel 70. FIG. 13 shows a detailed view of the 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. 14 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.

  In FIG. 10, the end cover 74 is formed with a skirt portion 74b that covers the return port 2a, and the skirt portion 74b is provided with a grill 74c that forms the return port 2a (see FIG. 3). The cold air discharged from the discharge port 76 is sucked into the communication path 34 through the return port 2a having the grill 74c.

  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 cold air flows through the cold air passage 32, the member 72 is cooled by the cold heat of the cold air. Further, the cool air discharged from the discharge port 76 and directed toward the return port 2a flows through the surface of the member 72, and the member 72 is cooled. Further, even when part of the member 72 is cooled by the cool air near the discharge port 76, the whole member 72 is cooled by heat conduction. 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.

  The member 72 whose surface has been cooled releases cold heat into the refrigerator compartment 2 to maintain the room temperature at the set temperature. 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 first accessory storage chamber 21 of the refrigerator 1. A cool air return chamber 34a is provided in the upper part of the communication path 34 behind the first accessory storage chamber 21 of the refrigerator compartment 2, and the return port 2a opens to the front of the cool air return chamber 34a.

  A temperature detector 108 is provided in the vicinity of the wall surface of the cold air return chamber 34a. The temperature detector 108 detects the temperature of the cold air flowing from the refrigerator compartment 2 into the cold air return chamber 34a through the return port 2a. Based on the detection result of the temperature detection device 108, 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.

  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.

  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 cold air flowing out from the freezer compartment 6 through the freezer return port 22 returns to the lower part of the cooler 11, and the cold air flowing out from the vegetable compartment 5 and passing through the return passage 46 returns to the lower part 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.

  The cold air that has passed 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 passed through the refrigerator compartment 3, the vegetable room 5, and the freezer room 6 with a large volume is cooled in the entire vertical direction of the cooler 11. Is done. 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. 15 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 refrigerator compartment fan 20 is opened and the refrigerator compartment fan 23 synchronized with the refrigerator compartment damper 20 is driven, the cold air branched on the exhaust side of the refrigerator compartment fan 12 flows through the cold air passage 32. The cold air flowing through the cold air passage 32 rises and is discharged from the discharge port 76 to the refrigerator compartment 2. At this time, the portion near the return port 2a of the discharge port 76 has a small vertical discharge width, so the discharge amount is small, and the portion away from the return port 2a has a wide vertical width, the discharge amount increases. The cool air discharged into the refrigerator compartment 2 cools the stored items in the refrigerator compartment 2 and cools the stored items in the first and second accessory storage chambers 21 and 102 and the tank chamber 103 and flows out from the return port 2a. .

  The cold air flowing out from the return port 2a passes through the communication path 34 and flows into the vegetable compartment 5 from the inlet 104. At this time, since the inlet 104 is provided above the vegetable compartment 2, the pressure loss of the cold air led from the return port 2a to the inlet 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 when it becomes preset temperature, the refrigerator compartment damper 20 will be closed and the refrigerator compartment fan 23 will be stopped. The cool air flowing through the cool air passage 32 and the cool air sent to the refrigerating chamber 2 cool the member 72 of the cool air panel 70 and indirectly cool the refrigerating chamber 2 by the cold heat released from the member 72.

  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, the heater 16 may be energized to switch the temperature from the refrigerated room temperature to the refrigerated room temperature. Thereby, it can switch to desired room temperature rapidly.

  Further, by energizing the heater 16, the room temperature of the temperature switching chamber 3 can be switched from a low temperature side where the stored items are cooled and stored to a high temperature side higher than normal temperature. Thereby, temporary heat insulation, warm cooking, etc. of the cooked heated food can be performed. In addition to the heater 16, a panel heater may be disposed on the wall surface of the temperature switching chamber.

  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, since the discharge port 76 is provided only at the upper rear of the refrigerator compartment 2 (storage chamber), the stored item is dried due to damage to the stored item due to condensed water generated near the discharge port 76 or cold air. Can be reduced. Further, since the member 72 made of a good heat conductor is provided in the refrigerator compartment 2, cold heat is uniformly discharged from the member 72 cooled by the cold air discharged from the discharge port 76 over a wide range. Therefore, the temperature distribution in the refrigerator compartment 2 can be made uniform.

  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.

  Further, since the discharge port 76 is arranged in the left-right direction so as to be biased to the opposite side of the return port 2a, a large amount of cold air from the discharge port 76 toward the return port 2a reaches the end in the refrigerator compartment 2, and the refrigerator compartment 2 The temperature distribution inside can be made more uniform.

  In addition, since the cold air passages 31 and 32 and the cooler 11 are arranged in the same direction as the discharge port 76 and the communication passage 34 is arranged on the side of the cooler 11, the width in the left-right direction of the refrigerator 1 can be reduced. The cold air passages 31 and 32 can be shortened. Moreover, the depth of the freezer compartment 6 can be ensured widely. Therefore, the volumetric efficiency and ventilation efficiency of the refrigerator 1 can be further improved.

  In addition, an ice making chamber 4 and a temperature switching chamber 3 are arranged side by side between the refrigerator compartment 2 and the freezing chamber 6, and the cooler 11 and the freezing chamber blower 12 are arranged in an ice making chamber 4 having a temperature lower than that of the temperature switching chamber 3. Therefore, the cold heat of the cold air led from the cooler 11 to the refrigerating chamber 2 is discharged to the ice making chamber 4. Accordingly, the cooling temperature is not taken away by the temperature switching chamber 3 having a temperature higher than that of the ice making chamber 4, and the cooling efficiency of the refrigerator 1 can be improved.

  Next, FIG. 16 has shown front sectional drawing of the refrigerator of 2nd Embodiment. 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, a branch path 105 that branches from the cold air passage 32 is formed to extend behind the first accessory storage chamber 21, and a discharge port 101 (isolation chamber discharge port) that opens to the first accessory storage chamber 21 is provided. . Other parts are the same as those in the first embodiment.

  A part of the cool air generated by the cooler 11 passes through the cold room blower 23 and immediately flows through the branch path 105 and is discharged from the discharge port 101 to the first accessory storage chamber 21. Thus, the first accessory storage chamber 21 is maintained at a lower temperature than the inside of the refrigerator compartment 2 outside the first accessory storage chamber 21. Accordingly, the first accessory storage chamber 21 is a chilled chamber maintained at a chilled temperature zone (about 0 ° C.) or an ice greenhouse maintained at an ice temperature (about −3 ° C.).

  In addition, a discharge port 106 that opens toward the cold air return chamber 34a (see FIG. 6) is provided at the end of the branch path 105. When a stored item is stored from the outside in a part of the refrigerator compartment 2 near the return port 2a, the temperature of the cold air flowing out from the return port 2a may rapidly increase due to the stored item. As a result, the temperature detection device 108 (see FIG. 6) detects an increase in temperature and supplies cold air to the refrigerating chamber 2, and other stored items that are sufficiently cooled may be cooled too much.

  By supplying a small amount of cold air from the discharge port 106 provided in the branch path 105 to the cold air return chamber 34a, the cold air flowing out from the return port 2a is mixed with the cold air whose temperature has risen rapidly. Thereby, the temperature rise of cold air | gum is relieve | moderated and cooling of the stored item more than necessary can be prevented.

  The position of the return port 2a may be provided away from the communication path 34 and from the center. Thereby, the effect of mixing the cold air from the discharge port 106 and the return port 2a can be improved, and the effect of alleviating the temperature rise of the cold air can be increased. In addition, as described above, the freezer compartment fan 12 and the cooler 11 are arranged so as to be biased to one of the left and right, and the communication path 34 is biased to the other and is arranged on the side of the cooler 11. For this reason, the return port 2a can be formed wide in the left-right direction near the center.

  According to the present embodiment, as in the first embodiment, the discharge port 76 is provided only at the upper rear of the refrigerator compartment 2 (storage chamber). Therefore, the stored matter is damaged or cooled by the condensed water generated in the vicinity of the discharge port 76. It is possible to reduce the drying of the stored product due to hitting. Further, since the member 72 made of a good heat conductor is provided in the refrigerator compartment 2, cold heat is uniformly discharged from the member 72 cooled by the cold air discharged from the discharge port 76 over a wide range. Therefore, the temperature distribution in the refrigerator compartment 2 can be made uniform.

  The first accessory storage chamber 21 is provided with a discharge port 101 (isolation chamber discharge port). However, since the first accessory storage chamber 21 is composed of an isolation chamber, the temperature zone is different from that in the refrigerator compartment 2 outside the first accessory storage 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 and second embodiments, the discharge port 76 opens to the member 72, but the discharge port 76 may be formed on the wall surface of the refrigerator compartment 2 away from the member 72. Thereby, the temperature fall near the discharge outlet 76 can be suppressed and dew condensation can be further reduced. The cold air passage 32 is provided on the back surface of the refrigerator compartment 2, but may be formed so as to extend along the side wall of the refrigerator compartment 2.

  INDUSTRIAL APPLICATION This invention can be utilized for the refrigerator which sends out cold air from a discharge outlet to a store room through a cold air channel | path.

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 Side surface sectional drawing of the cooling panel of the refrigerator of 1st Embodiment of this invention. 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 Front sectional drawing of the refrigerator of 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigerating room 2a Outlet 3 Temperature switching room 4 Ice making room 5 Vegetable room 6 Freezer room 11 Cooler 12 Freezer room fan 21 First accessory storage room (isolation room)
23 Cold room blower 31, 32 Cold air passage 34 Communication passage 34a Cold air return chamber 70 Cooling panel 71 Panel base 72 Member 73, 74 End plate 76 Discharge port 101 Discharge port (isolation chamber discharge port)
102 Second accessory storage room 103 Tank room

Claims (6)

A storage room for storing stored items;
A cooler for generating cold air flowing into the storage chamber;
A cold air passage through which the cold air from the cooler flows along the wall surface of the storage chamber;
A discharge port for discharging cold air flowing through the cold air passage into the storage chamber;
A plurality of placement shelves arranged in the storage room to place stored items;
A member made of a good thermal conductor that is disposed on the back surface of the storage chamber and discharges cold heat to the storage chamber over a plurality of stages of the mounting racks;
And the discharge port is disposed only at the upper rear of the storage chamber. A storage room for storing stored items;
An isolation chamber provided separately in the storage chamber;
A cooler for generating cold air flowing into the storage chamber;
A cold air passage through which the cold air from the cooler flows along the wall surface of the storage chamber;
A discharge port for discharging cold air flowing through the cold air passage into the storage chamber outside the isolation chamber;
An isolation chamber discharge port for discharging cool air flowing through the cold air passage into the isolation chamber;
A plurality of placement shelves arranged in the storage room to place stored items;
A member made of a good thermal conductor that is disposed on the back surface of the storage chamber and discharges cold heat to the storage chamber over a plurality of stages of the mounting racks;
And the discharge port is disposed only at the upper rear of the storage chamber.   A return port through which cool air returning from the storage chamber to the cooler flows out of the storage chamber is biased to one side in the left-right direction and arranged at the lower portion of the storage chamber, and the discharge port is a portion of the portion close to the return port in the left-right direction. The refrigerator according to claim 1 or 2, wherein a vertical width of a portion separated from the vertical width is larger.   The refrigerator according to claim 3, wherein the discharge port is arranged in the left-right direction so as to be biased to the opposite side of the return port.   A return passage through which the cold air flowing out from the return port circulates, the cold passage and the cooler being arranged on the same side as the discharge port, and the return passage being arranged on the side of the cooler; The refrigerator according to claim 4.   The refrigerator according to any one of claims 1 to 5, wherein the discharge port and the member are arranged apart from each other.

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