JP2008298356A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of improving volume efficiency, with respect to the refrigerator having a discharge passage for discharging cold air produced by a cooler to a storage compartment and a return passage for returning cold air from the storage compartment to the cooler. <P>SOLUTION: This refrigerator comprises the storage compartment 3 for cooling and storing stored objects, the cooler 5 for producing cold air, the discharge passage 20 having a discharge port 20b for discharging the cold air to the storage compartment 3 and guiding the cold air produced by the cooler 5 to the storage compartment 3, and the return passage 23 having return ports 23a, 23b in which the cold air flows from the storage compartment 3, and returning the cold air flowing in from the return ports 23a, 23b to the cooler 5, the discharge passage 20 and the return passage 23 are juxtaposed on the same wall surface of the storage compartment 3, and a member 27 composed of a platy good conductor of heat is disposed at a side facing to the storage compartment 3, of the discharge passage 20 or the return passage 23. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a refrigerator having a discharge passage for discharging cool air generated by a cooler to a storage chamber and a return passage for returning the cool air from the storage chamber to the cooler.

  A conventional refrigerator is disclosed in Patent Document 1. 12 and 13 are a front sectional view and a side sectional view showing a schematic configuration of the refrigerator. The refrigerator 1 is provided with a freezer compartment 2 at the top, and a refrigerator compartment 3 below the freezer compartment 2. The freezer compartment 2 and the refrigerator compartment 3 are partitioned by a partition wall 4 filled with a heat insulating material. The front surface of the freezer compartment 2 is opened and closed by a door 2a, and the front surface of the refrigerator compartment 3 is opened and closed by a door 3a.

  A cooler 5 that generates cool air is disposed on the back of the freezer compartment 2, and a blower fan 6 is disposed above the cooler 5. The cooler 5 and the blower fan 6 are arranged in a freezer compartment duct (not shown) provided on the back surface of the freezer compartment 2. The freezer duct is provided with a return port (not shown) that opens toward the freezer 3 below the cooler 5.

  A communication passage 7 connected to the exhaust side of the blower fan 6 is provided on the side of the cooler 5. A discharge passage 8 that communicates with the communication passage 7 extends in the vertical direction at a central portion in the left-right direction on the back surface of the refrigerator compartment 3. Discharge ports 8 a for discharging cool air are opened on both sides of the discharge passage 8. In the partition wall 4, a return passage 9 having a return port 9 a that opens at the front of the refrigerator compartment 3 is provided. The return passage 9 is connected to the freezer compartment duct of the freezer compartment 3 below the cooler 5.

  In the refrigerator 1 having the above configuration, the cold air generated by exchanging heat with the cooler 5 is discharged into the freezer compartment 2 as indicated by an arrow D 1 by driving the blower fan 6. The cold air discharged into the freezer compartment 2 flows through the freezer compartment 2 to cool the stored items, and returns to the cooler 5 through the return port of the freezer compartment duct.

  The cold air flowing through the freezer compartment duct branches on the exhaust side of the blower fan 6 and flows through the communication passage 7 and the discharge passage 8 as indicated by the arrow D2. The cold air flowing through the discharge passage 8 is discharged from the discharge port 8a into the refrigerator compartment 3 as indicated by an arrow D3. The cold air discharged into the refrigerator compartment 3 flows through the refrigerator compartment 3 to cool the stored items, and flows into the return passage 9 from the return port 9a at the front portion of the refrigerator compartment 3 as indicated by an arrow D4. The cold air flowing through the return passage 9 returns to the cooler 5 through the freezer compartment duct of the freezer compartment 3 as indicated by an arrow D5.

Japanese Patent No. 3892814 (pages 4-8, FIG. 1)

  However, according to the conventional refrigerator 1, the cold air flowing through the return passage 9 contains water and the like of stored items while flowing through the refrigerating chamber 3, and thus is easily frozen. For this reason, it is necessary to provide a heat insulating material having a predetermined thickness above and below the return passage 9 in the partition wall 4, and the thickness of the partition wall 4 increases. Therefore, there is a problem that the internal volume of the refrigerator 1 is reduced and the volumetric efficiency is lowered.

  An object of this invention is to provide the refrigerator which can improve volumetric efficiency.

  In order to achieve the above object, the present invention provides a storage room that cools and preserves stored items, a cooler that generates cool air, and a cool air generated by the cooler having a discharge port that discharges cool air into the storage room. A discharge passage for guiding the air to the storage chamber, and a return passage having a return port through which cool air flows from the storage chamber and returning the cool air flowing in from the return port to the cooler, the discharge passage and the return passage Are arranged in parallel on the back surface of the storage chamber, and a member made of a plate-like heat good conductor disposed on the side of the discharge passage or the return passage facing the storage chamber is provided.

  According to this configuration, the cold air generated by the cooler flows through the discharge passage provided on the back surface of the storage chamber and is discharged from the discharge port into the storage chamber. The cool air discharged into the storage chamber flows through the storage chamber to cool the stored item, and flows into the return passage arranged in parallel with the discharge passage through the return port. The cold air flowing through the return passage is returned to the cooler. Further, the cold heat of the cold air flowing through the discharge passage or the return passage is discharged into the storage chamber through a member made of a good heat conductor such as a metal plate. One of the discharge passage and the return passage may be covered by the member, or both may be covered.

  In the refrigerator having the above-described configuration, the discharge passage and the return passage are integrally formed by a duct having a plurality of passages extending vertically and attached to the wall surface.

  In the refrigerator configured as described above, the discharge passage may be disposed on both sides of the return passage, the return port may be disposed below the return passage, and the discharge port may be located above the return port. It is arranged on the side surface of the discharge passage.

  According to this configuration, the return passage is provided in the center of the back surface of the storage chamber, and the discharge passage is provided on the left and right of the return passage. The cool air flowing through the discharge passage is discharged from the discharge port disposed above both side surfaces to the side through the opening of the member, and after being lowered in the storage chamber, is guided to the return port in the substantially central portion.

  Moreover, the present invention is characterized in that in the refrigerator having the above-described configuration, a protruding portion that protrudes to the front side of the member and has a recess formed on the upper surface is provided below the member. According to this structure, the dew condensation generated on the member flows down the member and is stored in the concave portion of the protruding portion.

  In the refrigerator having the above-described configuration, the member extends to the periphery of the discharge passage and the return passage to cover the back surface of the storage chamber. According to this configuration, the member covers a large area on the back surface of the storage chamber, and the cold air flowing through the discharge passage or the return passage is conducted through the member and discharged from a wide range.

  Further, the present invention provides a refrigerator having the above-described configuration, an isolation chamber that is isolated by a partition portion and provided at a lower portion of the storage chamber, and an upper surface that is blocked by the partition portion and that has a gap around the isolation chamber. A storage case that is arranged, wherein the upper and lower sides of the partitioning portion communicate with each other at the front portion of the storage chamber, and the cold air flowing into the isolation chamber flows around the storage case and is guided to the return port. It is a feature.

  According to this configuration, the cold air discharged from the discharge port into the storage chamber descends in the storage chamber and flows into the isolation chamber below the partition portion at the front portion of the storage chamber. The cold air that has flowed into the isolation chamber flows around the storage case and flows into the return passage from the return port. The return port may be disposed above the partition part or may be disposed below the partition part.

  Moreover, the present invention is characterized in that in the refrigerator configured as described above, a freezing room is provided above the storage room, and the cooler is disposed on the back surface of the freezing room.

  According to the present invention, since the discharge passage for discharging cold air and the return passage for returning the cold air to the cooler are arranged in parallel on the back surface of the storage chamber, there is no need to provide a return passage in the partition wall with the other storage chamber. Can be reduced in thickness. Therefore, the volumetric efficiency of the refrigerator can be improved. Further, since the cold heat of the cold air flowing through the discharge passage or the return passage is conducted through the member and released from a wide area on the back surface of the storage chamber, the storage chamber can be uniformly cooled.

  According to the present invention, since the discharge passage and the return passage are integrally formed by a duct having a plurality of passages and attached to the wall surface, a refrigerator in which the number of parts is reduced and the discharge passage and the return passage are arranged in parallel is provided. It can be realized easily.

  Further, according to the present invention, the discharge passage is arranged on both sides of the return passage, the return port is arranged at the lower part, and the discharge port is arranged on the side surface of the upper part, so that the cold air discharged to the side of the storage chamber is lowered. Then return to the return port in the approximate center. Therefore, the cold air circulates in the storage chamber, so that a short circuit can be prevented and the cooling efficiency can be improved, and the temperature in the storage chamber can be made more uniform.

  Further, according to the present invention, since the protruding portion that protrudes forward and has a recess on the upper surface is provided below the member, the dew condensation of the member flows down and is stored in the recess. Thereby, the dew condensation water stored in the recess can be evaporated to prevent drying in the storage chamber.

  Further, according to the present invention, the member extends to the periphery of the discharge passage and the return passage to cover the back surface of the storage chamber, so that cold heat can be discharged into the storage chamber from a wider range of the back surface of the storage chamber. Therefore, the temperature of the storage chamber can be made more uniform.

  Further, according to the present invention, the storage case whose upper surface is closed by the partition portion that partitions the isolation chamber is arranged in the isolation chamber with a gap around the periphery, and the upper and lower sides of the partition portion communicate with each other at the front portion of the storage chamber to generate cold air. Since it circulates around the storage case and is guided to the return port, the stored item in the storage case can be indirectly cooled to prevent the stored item from drying.

  According to the present invention, since the cooler is disposed on the back of the freezer compartment provided above the storage chamber, the cool air is easily guided from the cooler to the discharge passage, and the cool air is easily guided from the return passage to the cooler. . Therefore, it is possible to reduce the pressure loss of the path through which the cold air flows. In addition, if a return passage is provided in the partition wall that partitions the storage chamber and the freezer compartment, moisture in the cold air is easily frozen by the low-temperature freezer compartment, but freezing can be easily prevented because the return passage is provided on the back surface.

  Embodiments of the present invention will be described below with reference to the drawings. For convenience of explanation, the same reference numerals are assigned to the same parts as those in the conventional example shown in FIGS. 1 and 2 are a side sectional view and a front sectional view showing a refrigerator according to one embodiment. The refrigerator 1 is provided with a freezer compartment 2 at the top, and a refrigerator compartment 3 (storage compartment) is provided below the freezer compartment 2. The freezer compartment 2 and the refrigerator compartment 3 are partitioned by a partition wall 4 filled with a heat insulating material. The front surface of the freezer compartment 2 is opened and closed by a door 2a, and the front surface of the refrigerator compartment 3 is opened and closed by a door 3a.

  A freezer compartment duct 10 is provided on the back of the freezer compartment 2. A discharge port 10a is provided in the upper part on the front side of the freezer compartment duct 10, and a return port 10b is provided in the lower part. A cooler 5 that generates cool air is disposed in the freezer compartment duct 10, and a blower fan 6 is disposed above the cooler 5. Below the cooler 5, a drain pan 11 that collects defrosted water from the cooler 5 is provided. Further, the freezer compartment duct 10 has a communication passage 7 that branches off on the exhaust side of the blower fan 6 and is arranged on the right side of the cooler 5.

  A low-temperature case 18 capable of low-temperature storage such as a chilled temperature zone is disposed at the upper part of the refrigerator compartment 3. The back surface of the low-temperature case 18 is opened, and cold air flows from a discharge port 20c described later. Below the low-temperature case 18, a plurality of mounting shelves 13 that are formed of a transparent resin molded product and on which stored items are placed are provided. The mounting shelf 13 is placed on the upper surface of a plurality of rails 13a projecting from the side wall of the refrigerator compartment 3, and the position in the height direction can be changed in time according to the stored item.

  A vegetable room 16 comprising an isolation room is provided at the lower part of the refrigerator compartment 3. The vegetable compartment 16 is partitioned from the upper part of the refrigerator compartment 3 by a plate-shaped partition 14 formed of a resin molded product. The upper and lower sides of the partition part 14 communicate with each other through a communication part 14 a in front of the partition part 14. An opening 14 b is provided at the rear end of the partition 14. In the vegetable compartment 16, a storage case 15 whose upper surface is closed by the partition 14 is arranged to be freely put in and out. The storage case 15 is arranged with a gap 16 a through which cold air flows between the wall of the vegetable compartment 16.

  A discharge passage 20 and a return passage 23 extending in the vertical direction are arranged in parallel on the rear surface of the refrigerator compartment 3. The discharge passage 20 has a left passage 21 and a right passage 22 disposed on the left and right sides of the return passage 23, respectively. A plurality of discharge ports 20b for discharging cool air are provided on the left side surface of the left passage 21 and the right side surface of the right passage 22, respectively.

  A lamp 30 whose front surface is covered with a transparent lamp cover 31 is disposed in front of the upper portion of the return passage 23. Since the mounting shelf 13 is made of a transparent resin, the light emitted from the lamp 30 passes through each mounting shelf 13. Thereby, it can illuminate to the lower part of the refrigerator compartment 3. The lamp 30 is disposed above a metal member 27 described later. For this reason, the emitted light of the lamp 30 is reflected by the member 27, and the inside of the refrigerator compartment 3 can be made brighter.

  If an opening is provided in the mounting shelf 13, illumination light can easily reach the lower part of the refrigerator compartment 3. In addition, the cool air discharged from the discharge port 20b can be guided to the lower mounting shelf 13 to further cool the stored items on each mounting shelf 13. At this time, rib-shaped protrusions for reinforcement may be provided around the opening of the mounting shelf 13. Further, if the transparent lamp cover 31 is disposed so as to cover the lamp 30, the emitted light from the lamp 30 can easily reach the lower part of the refrigerator compartment 3.

  Further, the cold heat of the cold air flowing through the return passage 23 is discharged into the lamp cover 31 through a panel 33 (see FIG. 4) described later. Thereby, the lamp 30 can be cooled, and the temperature rise of the refrigerator compartment 3 due to the heat generated by the lamp 30 can be reduced. A control unit for controlling the driving of the lamp 30 may be provided in the lamp cover 31, and the inside of the lamp cover 31 may be used as an electrical box. Also in this case, the heat generated in the electrical box is cooled by the cold heat of the cold air flowing through the return passage 23.

  An opening facing the return passage 23 may be provided in the lamp cover 31. Thereby, the air in the lamp cover 31 is sucked into the return passage 23 through the opening. For this reason, the temperature increase of the refrigerator compartment 3 due to the heat generated by the lamp 30 can be further reduced.

  FIG. 3 shows a cross-sectional view taken along the line AA of FIG. The discharge passage 20 and the return passage 23 are formed by attaching a duct 26 formed of a heat insulating material of a foamed resin molded product having a plurality of passages to the back wall of the refrigerator compartment 3. The discharge passage 20 and the return passage 23 are isolated by ribs 26 d and 26 e formed in the duct 26. Thereby, the discharge passage 20 and the return passage 23 are integrally formed, and the number of parts can be reduced.

  The passages of the duct 26 are separated by a heat insulating material. For this reason, even if there is a temperature difference between the cold air flowing through the discharge passage 20 and the cold air flowing through the return passage 23, the amount of cold heat transferred between them becomes minute. For this reason, it is possible to prevent the cooling efficiency of the refrigerator compartment 3 from being lowered due to the cold heat of the cold air flowing through the discharge passage 20 being transmitted to the cold air flowing through the return passage 23.

  FIG. 4 shows a detailed view of the main part of FIG. The front side of the duct 26 is covered with a panel 33 of a resin molded product. The duct 26 and the panel 33 are integrally formed by engaging a concave portion and a convex portion provided respectively, and are detachably attached to the back surface of the refrigerator compartment 3. Both ends of the panel 33 are bent backward to cover the side surface of the opened duct 26. A discharge port 20 b of the discharge passage 20 is formed by an opening formed on the side surface of the panel 33.

  The front side of the panel 33 is covered with a plate-like member 27. The member 27 is formed of a metal plate such as aluminum or stainless steel, and has a high thermal conductivity. The member 27 may be formed of a resin having high thermal conductivity. Both ends of the member 27 are bent backward, and an opening 27a facing the discharge port 20b is formed. The opening 27a is formed by cutting and raising a U-shaped cut, and the engagement claw 27b is formed by this cutting and raising.

  The engaging claw 27 b is engaged with the front end of the discharge port 20 b provided in the panel 33 and the back side of the duct 26. Thereby, the member 27 is attached to the back surface of the refrigerator compartment 3. The member 27 can be easily attached and detached by releasing the engagement of the engagement claw 27b by elastic deformation. The engaging claw 27 b may be formed to engage with the rear end of the panel 33.

  The cold energy of the cold air flowing through the discharge passage 20 and the return passage 23 is released into the refrigerator compartment 3 by the member 27. Thereby, the temperature distribution of the refrigerator compartment 3 can be made uniform. At this time, the temperature of the cold air flowing through the discharge passage 20 (about −12 to −8 ° C.) is lower than the temperature of the cold air flowing through the return passage 23 (about −2 to 1 ° C.). However, since the discharge passage 20 and the return passage 23 are arranged side by side, the surface of the member 27 becomes a uniform temperature by heat conduction, and the temperature distribution in the refrigerator compartment 3 can be easily made uniform.

  The duct 26 is provided with a recess 26 c on the back side of the heat insulating material facing the return passage 23. Thereby, the thickness of the heat insulating material in the portion facing the return passage 23 is made thinner than the portion facing the discharge passage 20. For this reason, the amount of cold per unit area transmitted from the return passage 23 to the member 27 and the amount of cold per unit area transmitted from the discharge passage 20 to the member 27 can be made comparable. Therefore, since the variation in the surface temperature of the member 27 can be further reduced, the temperature distribution in the refrigerator compartment 3 can be made more uniform. In addition, it is possible to suppress the condensation on the surface of the member 27 by increasing the thickness of the heat insulating material facing the discharge passage 20 through which cooler cold air flows.

  A plurality of recesses 26c may be provided. Further, instead of the recess 26c, a through hole may be formed in the heat insulating material. Similarly, the portion of the panel 33 facing the return passage 23 may be formed thinner than the portion of the panel 33 facing the discharge passage 20.

  Further, since the engaging claw 27b engages with the discharge port 20b, the cold air discharged from the discharge port 20b is transmitted to the member 27 through the engaging claw 27b. Therefore, the amount of cold heat released from the member 27 can be further increased.

  A protrusion 33 a that protrudes forward is provided at the lower portion of the panel 33. FIG. 5 is a side sectional view showing details of the protruding portion 33a. A convex portion 33b that protrudes downward is provided at the lower front portion of the protruding portion 33a. The rear end of the protruding portion 33 a is locked to the step portion 35 b formed in the inner box 35 a of the heat insulating box 35, and the convex portion 33 b comes into contact with the upper surface of the partition portion 14. Thereby, the protrusion part 33a is supported stably. In addition, return ports 23a and 23b are formed on the front surface and the lower surface of the protruding portion 33a.

  The protruding portion 33 a extends forward of the member 27 and is formed below the member 27. The lower end of the member 27 is supported by a support portion 33c extending forward from the panel 33 above the protruding portion 33a. A notch 33d is formed on the upper surface of the protrusion 33a, and the receiving member 34 is attached to the notch 33d.

  The receiving member 34 is made of a resin molded product, and is formed with a recess 34a having an upper surface opened. A protrusion 34c protruding outward is formed on the periphery of the recess 34a. A convex portion 34b is provided below the front protruding portion 34c. The rear protrusion 34c is inserted into a groove 33e provided on the vertical surface of the panel 33, and the convex 34b is pushed into the notch 33d. Thereby, the front end of the notch 33d is sandwiched between the protrusion 34c and the protrusion 34b at the front, and the receiving member 34 is attached.

  Since the protruding portion 33a is disposed below the member 27, the dew condensation generated in the member 27 flows down to the recess 34a. Thereby, the dew condensation water stored by the recessed part 34a can evaporate, and the drying in the refrigerator compartment 3 can be suppressed. By adhering or welding the receiving member 34 and the notch 33d with a sealant or the like, it is possible to prevent the intrusion of condensed water into the protrusion 33a.

  The panel 33 can be easily attached and detached by placing fingers on the concave portion 34a and the convex portion 33b on the lower surface of the protruding portion 33a.

  Concavities and convexities extending in the horizontal direction may be provided on the front surface of the member 27, and the condensation generated on the member 27 may be retained by the concavities and convexities. Thereby, the dew condensation water hold | maintained at the unevenness | corrugation of the member 27 evaporates, and it can further suppress the drying in the refrigerator compartment 3. FIG.

  FIG. 6 is a side sectional view showing a section passing through the discharge passage 20. The discharge passage 20 communicates with the communication passage 7 via the damper 17 at the upper portion. FIG. 7 is a cross-sectional view taken along the line BB in FIG. The discharge passage 20 has a branch portion 20 a disposed below the damper 17 on the front side of the return passage 23. The discharge passage 20 branches into a left and right left passage 21 and a right passage 22 (see FIG. 2) at a branching portion 20a.

  In FIG. 2, the return passage 23 has first and second branch passages 24, 25 that branch left and right at the top. FIG. 8 is a side sectional view showing a section passing through the return passage 23. The first and second branch paths 24 and 25 are disposed on the back side of the freezer compartment duct 10. The freezer compartment duct 10 and the first and second branch passages 24 and 25 communicate with each other through communication ports 24a and 25a opened to the back side of the freezer compartment duct 10 below the cooler 5.

  The return passage 23 is provided with a return port 23a that opens to the front at the lower end of a member 27 that covers the front side. Further, the return passage 23 has an open bottom surface, and a return port 23b facing the opening 14b (see FIG. 1) is formed. The return ports 23a and 23b are arranged on the upper side of the partition portion 14 (see FIG. 1).

  A receiving portion 12 a of the drain pipe 12 is disposed below the drain port 11 a of the drain pan 11. As shown in FIG. 8, the receiving portion 12 a is disposed in front of the first and second branch paths 24 and 25. The drain pipe 12 extends rearward from the receiving portion 12a through the first and second branch paths 24 and 25, and is disposed behind the return passage 23 and extends downward. The defrost water collected in the drain pan 11 is drained to an evaporating dish (not shown) through the drain pipe 12. Therefore, the return passage 23 branches into the first and second branch passages 24 and 25 and the flow passage area is not reduced, and interference between the return passage 23 and the drainage pipe 12 can be easily prevented.

  In the refrigerator 1 having the above-described configuration, air flowing through the freezer compartment duct 10 is driven by the blower fan 6 to exchange heat with the cooler 5 to generate cold air. The cool air generated by the cooler 5 is discharged into the freezer compartment 2 from the discharge port 10a as indicated by an arrow E1 (see FIG. 1). The cold air discharged into the freezer compartment 2 flows through the freezer compartment 2 to cool the stored items, and returns to the cooler 5 through the return port 10b.

  Further, the cold air is branched on the exhaust side of the blower fan 6 as shown by an arrow E <b> 2 (see FIGS. 2 and 6) and flows through the communication path 7. The cold air flowing through the communication passage 7 flows into the discharge passage 20 via the damper 17 and branches at the branch portion 20a. A part of the cold air flowing into the discharge passage 20 is discharged into the low temperature case 18 from the branch portion 20a through the discharge port 20c as shown by an arrow E3 (see FIG. 1). The low temperature case 18 is maintained at a low temperature because a large amount of cold air that has passed through the damper 17 is immediately supplied. The cold air flowing through the low temperature case 18 flows out into the refrigerating chamber 3 mainly from the front side of the low temperature case 18.

  The cold air in the low-temperature case 18 and the cold heat of the stored items are released downward from the lower surface of the low-temperature case 18. The stored items arranged below the low temperature case 18 are directly cooled by the cool air sent to the front of the low temperature case 18 and indirectly cooled by the cold heat released from the lower surface side of the low temperature case 18.

  Thereby, the lower part of the refrigerator compartment 3 can be sufficiently cooled even if the amount of cold air discharged from the discharge port 20b described later is reduced. In particular, the amount of cool air discharged from the lower discharge port 20b can be suppressed. Therefore, it becomes possible to suppress the drying of the stored product as much as possible by the cold air directly hitting the stored product.

  Furthermore, the member 27 provided in front of the panel 33 indirectly cools the lower portion of the low-temperature case 18 by cold heat from at least one of the discharge passage 20 and the return passage 23. For this reason, even if it reduces the amount of cool air discharged from the discharge port 20b, it can cool uniformly and can further reduce the drying of the stored product. In particular, deterioration due to drying of stored items such as raw foods (for example, short cakes, fresh confectionery, vegetables, fruits, etc.) can be suppressed.

  The cold air branched at the branch portion 20a flows down the left passage 21 and the right passage 22 of the discharge passage 20 as shown by arrows E4 and E5 (see FIGS. 2 and 6). The cold air flowing down the discharge passage 20 is discharged from the discharge port 20b into the refrigerating chamber 3 as indicated by an arrow E6 (see FIGS. 1 to 3). At this time, since the discharge port 20b is provided on the side surfaces of the left passage 21 and the right passage 22, the discharge port 20b is discharged toward the side as shown in FIGS. Further, the cold heat of the cold air flowing down the discharge passage 20 is released to the refrigerator compartment 3 through the member 27.

  The cool air discharged into the refrigerator compartment 3 circulates forward along the mounting shelf 13 as shown by an arrow E7 (see FIGS. 1 and 6). Since a plurality of discharge ports 20b are provided in the vertical direction, the stored items at each stage partitioned by the plurality of mounting shelves 13 can be easily cooled. In addition, in the case of a stored item at a stage where the discharge port 20 b is not provided, the stored item is indirectly cooled via the mounting shelf 13 by the cold air flowing along the upper and lower mounting shelves 13.

  The cold air flowing along the mounting shelf 13 descends in front of the mounting shelf 13 as indicated by an arrow E8 (see FIGS. 1 and 6). A part of the cool air descending the front part of the refrigerator compartment 3 circulates on the partition 14 as shown by an arrow E9 (see FIG. 1) and flows into the return passage 23 through the return port 23a on the front side.

  Further, a part of the cold air descending the front part of the refrigerator compartment 3 flows into the vegetable compartment 16 via the communication part 14 a in front of the partition part 14. The cold air that has flowed into the vegetable compartment 16 circulates in the gap 16a around the storage case 15 as shown by an arrow E10 (see FIG. 1). The gap 16 a is also provided on the side of the storage case 15.

  The cool air flowing around the storage case 15 flows above the partition 14 via the rear opening 14b and flows into the return passage 23 via the return port 23b on the lower surface side. In the storage case 15, the stored items inside are indirectly cooled by the cool air (E 9) that flows along the partition 14 that closes the upper surface and the cool air (E 10) that flows through the surrounding gap 16 a.

  The cold air that has flowed into the return passage 23 rises as shown by an arrow E11 (see FIGS. 2 and 8). The cold heat of the cold air rising up the return passage 23 is released into the refrigerator compartment 3 through the member 27. The cool air rising in the return passage 23 branches to the first and second branch paths 24 and 25 as shown by arrows E12 and E13 (see FIGS. 2 and 8). The cold air flowing through the first and second branch passages 24 and 25 flows into the freezer compartment duct 10 through the communication ports 24a and 25a and returns to the cooler 5.

  Since the cool air is returned to the cooler 5 through the communication ports 24a and 25a provided on the left and right, the amount of cool air returning to the cooler 5 can be adjusted by appropriately forming the opening areas of the communication ports 24a and 25a. Thereby, the state with the frost of the cooler 5 can be adjusted easily, and frost can be made to adhere uniformly in the left-right direction.

  Accordingly, the efficiency of defrosting can be improved, and power saving can be achieved by shortening the defrosting time. This effect is particularly great when the width of the cooler 5 in the left-right direction is large. For this reason, when the width in the left-right direction of the cooler 5 is increased, the heat exchange amount of the cooler 5 is increased, and the cooling efficiency is improved, and the power consumption during defrosting can be suppressed.

  According to the present embodiment, the discharge passage 20 that discharges cold air and the return passage 23 that returns the cold air to the cooler 5 are arranged in parallel on the back surface, which is the same wall surface of the refrigerator compartment 3, so There is no need to provide a return passage in the partition wall 4, and the thickness of the partition wall 4 can be reduced. Therefore, the volumetric efficiency of the refrigerator 1 can be improved.

  In particular, since the partition wall 4 is adjacent to the low-temperature freezer compartment 2, if a return passage is provided in the partition wall 4, moisture in the cold air is likely to freeze, but since the return passage 23 is provided on the back surface, freezing can be easily prevented. . Further, since the cooler 5 is arranged on the back surface of the freezer compartment 2, the cool air is easily guided from the cooler 5 to the discharge passage 20 on the back surface, and the cool air is easily guided to the cooler 5 from the return passage 23 on the back surface. Therefore, it is possible to reduce the pressure loss of the path through which the cold air flows. The discharge passage 20 and the return passage 23 may be provided side by side on the side wall surface of the storage chamber.

  Further, since the cold heat of the cold air flowing through the discharge passage 20 and the return passage 23 is conducted through the member 27 made of a good heat conductor and is released from a wide area on the back surface of the refrigerator compartment 3, the inside of the refrigerator compartment 3 is uniformly cooled. be able to. One of the discharge passage 20 and the return passage 23 may be covered by the member 27.

  Further, the member 27 may extend to the periphery of the discharge passage 20 and the return passage 23 so as to cover the back surface of the refrigerator compartment 3. Thereby, cold heat can be discharged into the refrigerator compartment 3 from a wider range on the back of the refrigerator compartment 3. Therefore, the temperature of the refrigerator compartment 3 can be made more uniform.

  Further, the left passage 21 and the right passage 22 are disposed on both sides of the return passage 23, the return port 23a is disposed at the lower portion, and the discharge port 20b is disposed on the side surfaces of the upper left passage 21 and the right passage 22. The cool air discharged to the side of the refrigerator compartment 3 descends and returns to the return port 23a at the substantially central portion. Therefore, cold air circulates in the refrigerating chamber 3 to prevent a short circuit and improve the cooling efficiency, and to make the temperature in the refrigerating chamber 3 uniform. The discharge port 20b may be formed toward the front as long as the discharge port 20b is disposed on a side portion away from the return passage 23.

  Moreover, since the member 27 has the engaging claw 27b which opens corresponding to the discharge port 20b and engages with the discharge port 20b, the member 27 can be easily attached and detached. Therefore, the member 27 and the panel 33 on the front side of the duct 26 can be easily cleaned, and the inside of the refrigerator compartment 3 can be kept clean. In addition, the engaging claw 27b can be easily formed by cutting and raising the opening 27a.

  Next, FIG. 9 is a top sectional view showing details of the back wall portion of the refrigerator compartment of the refrigerator of the second embodiment. FIG. 10 is a detailed view of part H in FIG. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. In this embodiment, a panel 36 is provided instead of the panel 33 of the first embodiment, and the shapes of the duct 26 and the member 27 are partially different from those of the first embodiment. Other parts are the same as those in the first embodiment.

  The panel 36 made of a resin molded product is provided with groove portions 36a that are bent in a U shape at both ends on the front side. The duct 26 made of a heat insulating material is formed with a recess 26f that escapes the groove 36a. An engagement hole (not shown) is provided on the side wall of the groove 36a. Both ends of the member 27 are bent rearward, and an engaging claw (not shown) provided in a portion extending rearward engages with the engaging hole of the groove 36a. Thereby, the member 27 which covers the front side of the discharge passage 20 and the return passage 23 is detachably attached.

  Moreover, as shown in the front view of FIG. 11, the panel 36 has a plurality of openings 36b on the front side. Thereby, the weight of the panel 36 can be reduced and attachment can be made easy.

  According to this embodiment, the same effect as that of the first embodiment can be obtained. Further, in the first embodiment shown in FIG. 4 described above, the member 27 is attached by the engaging claw 27b provided on the back surface side, but in this embodiment, the member 27 is attached by the engaging claw provided on the side surface. Therefore, the member 27 can be attached and detached more easily. An engagement hole may be provided in the member 27 to form an engagement claw in the groove 36a.

  In the first and second embodiments, it is more desirable to partition the return ports 23a, 23b and the discharge port 20b by the mounting shelf 13. Thereby, the short circuit of the cool air discharged from the discharge port 20b can be prevented more reliably. Therefore, the cooling efficiency can be further improved and the temperature in the refrigerator compartment 3 can be made more uniform. Thereby, even if the discharge passage 20 and the return passage 23 are provided on the rear surface, the thickness of the partition wall 4 is reduced, and the volume of the refrigerator compartment 3 is increased, the refrigerator 1 with good cooling efficiency can be obtained.

  In addition, a storage case 15 whose upper surface is closed by a partition 14 that partitions the vegetable compartment 16 is arranged in the vegetable compartment 16 with a gap 16a around it, and is partitioned on the front side away from the rear side where the return passage 23 is arranged. Since the upper and lower portions of the portion 14 communicate with each other and the cool air flows around the storage case 15 and is guided to the return port 23b, the stored item in the storage case 15 can be indirectly cooled to prevent the stored item from drying.

  Moreover, since the return ports 23a and 23b are arranged on the upper side of the partition part 14 and the partition part 14 opens near the return ports 23a and 23b, it is possible to easily circulate cool air along the upper surface of the partition part 14 and store the case 15 The inside can be further cooled. Moreover, the cold air which distribute | circulated the vegetable compartment 16 can be easily guide | induced to the return port 23b.

  Moreover, since the return ports 23a and 23b are provided on the front and lower surfaces of the return passage 23, the cold air flowing along the upper surface of the partition 14 flows into the front return port 23a and flows through the vegetable compartment 16. Cold air rising through the opening 14b of the partition 14 flows into the return port 23b on the lower surface side. Therefore, cold air can flow smoothly and pressure loss can be reduced. The return passage 23 may be extended into the vegetable compartment 16 and the return port 23 b may be provided in the vegetable compartment 16.

  ADVANTAGE OF THE INVENTION According to this invention, it can utilize for the refrigerator which has the discharge channel which discharges cold air, and the return channel | path which returns cold air to a cooler.

Side surface sectional drawing which shows the refrigerator of 1st Embodiment of this invention. Front sectional drawing which shows the refrigerator of 1st Embodiment of this invention. AA sectional view of FIG. Detailed view of the main part of FIG. Side surface sectional drawing which shows the detail of the protrusion part of the refrigerator of 1st Embodiment of this invention Side surface sectional drawing which shows the cross section which passes along the discharge passage of the refrigerator of 1st Embodiment of this invention. BB sectional view of FIG. Side surface sectional drawing which shows the cross section which passes along the return channel | path of the refrigerator of 1st Embodiment of this invention Top surface sectional drawing which shows the back wall part of the refrigerator of the refrigerator of 2nd Embodiment of this invention Detailed view of part H in FIG. The front view which shows the panel of the refrigerator of the refrigerator of 2nd Embodiment of this invention. Front sectional view showing a conventional refrigerator Side sectional view showing a conventional refrigerator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Freezing room 3 Refrigerating room 4 Partition wall 5 Cooler 6 Blower fan 7 Communication path 8, 20 Discharge path 8a, 20b, 20c Discharge port 9, 23 Return path 9a, 23a, 23b Return port 10 Freezer chamber duct 11 Drain pan DESCRIPTION OF SYMBOLS 12 Drain pipe 13 Mounting shelf 14 Partition part 14b Opening part 15 Storage case 16 Vegetable room 17 Damper 18 Low temperature case 21 Left channel 22 Right channel 24 First branch channel 25 Second branch channel 26 Duct 27 Member 27b Engagement claw 30 Lamp 31 Lamp cover 33, 36 Panel 33a Protruding part 34 Receiving member 34a Concave part 35 Heat insulation box 35a Inner box

Claims (7)

  A storage chamber that cools and stores the stored material; a cooler that generates cold air; a discharge passage that discharges the cold air into the storage chamber and guides the cold air generated by the cooler to the storage chamber; and A return passage through which cool air flows from the storage chamber returns to the cooler, and the discharge passage and the return passage are arranged in parallel on the back of the storage chamber. A refrigerator comprising a member made of a plate-like heat good conductor disposed on a side of the discharge passage or the return passage facing the storage chamber.   The refrigerator according to claim 1, wherein the discharge passage and the return passage are integrally formed by a duct having a plurality of passages extending vertically and attached to a back surface of the storage chamber.   The discharge passages are disposed on both sides of the return passage, the return port is disposed at a lower portion of the return passage, and the discharge port is disposed on a side surface of the discharge passage above the return port. The refrigerator according to claim 2.   The refrigerator according to claim 2 or 3, wherein a protruding portion that protrudes to the front side of the member and has a recess formed on the upper surface is provided below the member.   The refrigerator according to any one of claims 1 to 4, wherein the member extends to the periphery of the discharge passage and the return passage to cover the back surface of the storage chamber.   An isolation chamber that is isolated by a partition and provided at a lower portion of the storage chamber; and a storage case that is closed in the upper surface by the partition and has a clearance around the storage chamber, and is disposed in the isolation chamber. The upper and lower sides of the partition part communicate with each other at the front part of the chamber, and cool air flowing into the isolation chamber flows around the storage case and is guided to the return port. The refrigerator in any one.   The refrigerator according to any one of claims 1 to 6, wherein a freezing room is provided above the storage room, and the cooler is disposed on a back surface of the freezing room.

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