JP4786762B2 - refrigerator - Google Patents

Description

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

  FIG. 11 shows a partial side sectional view of a conventional refrigerator. In the refrigerator 1, an inner box 2 b is arranged inside an outer box 2 a that covers the outside, and a gap between the outer box 2 a and the inner box 2 b is filled with a heat insulating material 2 c such as foamed polyurethane. The front surface of the refrigerator compartment 11 covered with the inner box 2 b can be opened and closed by a rotating heat insulating door 3.

  An ice greenhouse 14 as an isolation room is provided below the refrigerator compartment 11, and a vegetable compartment 12 is disposed below the ice greenhouse 14. The front of the vegetable compartment 12 can be opened and closed by a sliding heat insulating door 4. The refrigerator compartment 11 and the vegetable compartment 12 are partitioned by partition plates 31 and 32 made of resin molded products. The partition plate 32 is provided with a through hole 32a.

  A cool air passage 28 through which cool air generated by a cooler (not shown) flows is provided behind the refrigerator compartment 11 and the ice greenhouse 14. A member 42 facing the cold air passage 28 is provided on the back surface of the refrigerator compartment 11. A back plate 35 facing the cold air passage 28 is provided on the back surface of the ice greenhouse 14 via a heat insulating material 36.

  The cold air flows into the refrigerating chamber 11 through the openings 42 a and 36 a provided in the member 42 and the heat insulating material 36, and cools the inside of the refrigerating chamber 11. Then, the cold air descends due to its own weight, and forms an air flow that flows into the vegetable compartment 12 from the through hole 32a through the cold air passage 30. Thereby, the inside of the vegetable compartment 12 is cooled.

  The member 42 is made of a metal plate or the like, and transmits the cold heat generated by the cold air flowing through the cold air passage 28 to be discharged into the refrigerator compartment 11. Therefore, the refrigerator compartment 11 is uniformly cooled by the cold heat released from the entire surface of the member 42. Further, while the cooler is stopped, the accumulated cold heat is discharged to keep the inside of the refrigerator compartment 11 cool.

JP 05-126450 A

  However, according to the conventional refrigerator described above, the refrigerator compartment 11 is uniformly cooled by the cold heat released from the entire surface of the member 42. However, when the amount of cold air flowing through the cold air passage 28 increases, And the temperature difference between the inside of the cool air passage 28 is increased. Thereby, dew condensation occurs on the surface of the member 42 on the refrigerator compartment 11 side. As a result, there has been a problem that food stored in the refrigerator compartment 11 is quickly deteriorated by drying the refrigerator compartment 11.

  An object of the present invention is to provide a refrigerator that can achieve uniform temperature in a storage chamber and prevent condensation.

  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 a cool air flowing from the cooler extending to the back of the storage chamber. A cool air passage, a member that is provided on the back side of the storage chamber and that discharges cold heat into the storage chamber, and a heat insulation that is provided on the back side of the storage chamber on the side where the cool air from the cooler flows into the cool air passage And a cool air flowing through the cool air passage is discharged into the storage chamber from above the member.

  In the refrigerator having the above-described configuration, the present invention is characterized in that the refrigerator has a ceiling duct that communicates with the cold air passage and is arranged along a ceiling portion of the storage room.

  In the refrigerator having the above-described configuration, the member includes a metal plate, and the member is detachable.

  Moreover, the present invention is characterized in that in the refrigerator configured as described above, the member is provided with an uneven shape.

  Moreover, the present invention is characterized in that, in the refrigerator configured as described above, the air in the storage chamber is guided into the cold air passage so as to be mixed with the cold air cooled by the cooler.

  According to the present invention, a part of the cold heat of the cold air passing through the cold air passage is transmitted to the member composed of the cold storage member and the heat conduction member, and is discharged from the entire surface into the storage chamber. Therefore, the storage chamber is uniformly cooled by the cold heat uniformly discharged from a large area. At this time, part of the cool air passage is not transmitted from the cool air to the member by the heat insulating member. For this reason, even if a lot of cool air flows through the cool air passage, condensation does not occur on the members and the discharge part. And by changing the area which installs a heat insulation member, cold air of desired temperature and flow volume can be distribute | circulated.

  In addition, the member facing the first passage where the heat insulating member is arranged is transmitted with cold from the second passage. As a result, the discharged cold heat is slightly reduced in the first passage portion, resulting in temperature variations in the storage chamber. For this reason, by arranging the second passage substantially at the center in the horizontal direction, the cold heat can be uniformly distributed in the lateral direction of the storage chamber, and the temperature distribution can be made uniform. Furthermore, the temperature variation can be further reduced and more uniform cooling can be performed by disposing the discharge portion substantially at the center between the side wall of the second passage and the side wall of the storage chamber.

It is side surface sectional drawing of the refrigerator of 1st Embodiment of this invention. It is a front view of the refrigerator compartment of the refrigerator of 1st Embodiment of this invention. It is a principal part detail drawing of the refrigerator of 1st Embodiment of this invention. It is an upper surface sectional view of the refrigerator of a 1st embodiment of the present invention. It is a perspective view which shows the member of the refrigerator of 1st Embodiment of this invention. It is a perspective view which shows the other member of the refrigerator of 1st Embodiment of this invention. It is principal part sectional drawing of the member of the refrigerator of 1st Embodiment of this invention. It is principal part sectional drawing of the member of the refrigerator of 1st Embodiment of this invention. It is side surface sectional drawing of the refrigerator of 2nd Embodiment of this invention. It is a front view of the refrigerator compartment of the refrigerator of 2nd Embodiment of this invention. It is front sectional drawing of the conventional refrigerator.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing the refrigerator of the first embodiment. In the refrigerator 1, an inner box 2 b is arranged inside an outer box 2 a that covers the outside, and a gap between the outer box 2 a and the inner box 2 b is filled with a heat insulating material 2 c such as foamed polyurethane. The inside of the refrigerator 1 is divided into the refrigerator compartment 11, the vegetable compartment 12, and the freezer compartment 13 in order from the top.

  The vegetable compartment 12 and the freezer compartment 13 are partitioned by a partition frame 17 made of a heat insulating member and a partition plate 19 made of a heat insulating member, and the freezer compartment 13 is further partitioned into an upper part and a lower part by a partition frame 18 made of a heat insulating member. . The refrigerator compartment 11 and the vegetable compartment 12 are partitioned by a partition frame 16 made of a heat insulating member and partition plates 31 and 32 made of a resin molded product. The partition plate 32 is provided with a through hole 32a.

  An ice greenhouse 14, which is an isolation room partitioned by a partition plate 46, is provided at the lower part of the refrigerator compartment 11. The refrigerator compartment 11 is provided with a plurality of shelves 45. The front surface of the refrigerator compartment 11 can be opened and closed by a rotating heat insulating door 3. The upper part of the vegetable compartment 12, the freezer compartment 13, and the lower part of the freezer compartment 13 can be opened / closed by heat-insulating doors 4, 5, 6 with sliding front surfaces, respectively, and the storage containers 54, 55, 56 can be drawn out. ing.

  A compressor 20 is disposed at the rear of the freezer compartment 13. A condenser (not shown) is connected to the compressor 20 via a discharge pipe 20a, and coolers 21 and 25 are connected in series via a suction pipe 20b. The condenser and the cooler 25 are connected via a first capillary tube (not shown). A second capillary tube (not shown) is disposed between the coolers 21 and 25.

  Thus, a refrigeration cycle is configured, and when the refrigeration cycle operation is performed, the coolers 21 and 25 are cooled. Defrost heaters 61 and 62 for defrosting the coolers 21 and 25 are provided below the coolers 21 and 25. 63 and 64 are drain receiving members.

  Further, switching means is provided between the condenser and the first capillary tube, and the switching means and the cooler 21 are connected via a third capillary tube (not shown). And only the cooler 21 can be cooled by switching the switching means.

  The cooler 21 is disposed in the cool air passage 23, and the cool air passage 23 is formed by the inner box 2b and an evaporative cover 33 made of a resin molded product. A blower 22 is disposed above the cooler 21 in the cool air passage 23. The cold air passage 23 communicates with the freezer compartment 13 through an inlet 13a and an outlet 13b to the freezer compartment 13 provided in the back plate 33a.

  The cooler 25 is disposed in the cold air passage 27. The lower part of the cold air passage 27 is formed by the inner box 2 b and the back plate 34 of the vegetable compartment 12. The back plate 34 is made of a heat insulating member, and prevents overcooling of the vegetable compartment 12 that is provided close to the cooler 25. A blower 26 is disposed above the cooler 25 in the cool air passage 27. The cold air passage 27 communicates with the vegetable compartment 12 through the outlet 12b.

  The upper part of the cold air passage 27 is formed by a heat insulating member 36 fixed to the back plate 35 of the ice greenhouse 14 and the inner box 2b. The heat insulating member 36 is provided with a discharge port 36a. When the front view of the refrigerator compartment 11 is shown in FIG. 2, the discharge port 35a is provided in the back plate 35 in the same position as the discharge port 36a. The refrigerator compartment 11 communicates with the cold air passage 27 through the discharge ports 35a and 36a.

  The cold air passage 27 communicates with the cold air passage 28 in the rear portion of the refrigerator compartment 11. In FIG. 2, the cool air passage 28 is branched by a rib 28d into a central passage 28a (second passage) disposed substantially at the center and side passages 28b (first passages) provided on both sides of the central passage 28a. Yes. The ribs 28d are formed integrally with a back plate 70 described later. The cold air passage 27 is also branched into branch passages 27 a and 27 b corresponding to the cold air passage 28.

  A blower 29 is disposed at the lower end of the central passage 28a. A blower cover 41 facing the refrigerator compartment 11 is attached to the front surface of the blower 29. A plurality of openings 41 a are formed in the blower cover 41.

  When the detailed view of the blower 29 is shown in FIG. 3, the central passage 28a circulates through the cold air passage 27 by the air taken in from the refrigerator compartment 11 by the blower 29 through the opening 41a and the blower 26 (see FIG. 1). Cold air is mixed. The cold air flowing through the cold air passage 27 collides with the wall surface 41b of the blower cover 41 and is guided toward the blower 29 by the guide portion 41c. When the blower cover 41 is made of metal, the guide portion 41c may be cut and raised and formed integrally.

  At this time, an appropriate heat insulating member may be provided on the inner surface of the blower cover 41 in the cold air flow area from the cold air passage 27 to prevent condensation. In addition, when the blower cover 41 is formed of metal or the like, cold heat of the cold air passing through the central passage 28 a is released from the blower cover 41 into the refrigerator compartment 11.

  The opening 41 a is formed above the guide portion 41 c and is arranged outside the course of the cold air flowing through the cold air passage 27. This prevents cold air flowing through the cold air passage 27 from entering the refrigerator compartment 11 from the opening 41a. As a result, it is possible to prevent local overcooling of the refrigerator compartment 11 due to cold air leakage.

  The cold air passage 28 is formed by a member 42 forming the inner wall of the refrigerating chamber 11 and a back plate 70 provided on the inner box 2b. The back plate 70 is formed integrally with the back plate 35 described above. The member 42 is formed of a heat conductive member having a heat conductivity having a shape as shown in FIG. 5 (for example, aluminum alloy or stainless steel having good workability and high rust prevention effect).

  This makes it possible to store cold and release cold. In addition, when the thickness of the said heat conductive member is thick, cold storage capacity goes up and intensity | strength also increases. When the thickness is small, the efficiency of releasing cold heat increases, which is advantageous for weight reduction. Therefore, a thin plate material or a thick plate material may be selected and provided at an appropriate place according to the purpose.

  The surface area can be increased by providing an uneven shape on the surface of the member 42 by pressing or the like. As a result, the amount of cold storage and the amount of released heat is increased, and the cooling efficiency can be improved. Furthermore, the intensity | strength of the member 42 can be reinforced by providing the recessed part or convex part which continues in a linear form.

  Moreover, the cross-sectional detailed drawing of the upper end and lower end part of the member 42 is shown in FIG. According to these drawings, the member 42 is locked by an upper mounting portion 71 provided on the back plate 70 and a lower mounting portion 72 provided on the back plate 35. When the lever portion 71a of the upper mounting portion 71 is pushed up with fingers, the engagement of the claw portion 71b is released.

  In this state, the member 42 can be attached and detached by tilting the upper part of the member 42 forward and pulling it upward, so that the member 42 is detachable. As a result, the cold air passage 28 and the member 42 can be easily cleaned on the cold air passage 28 side. The lower part of the member 42 is hermetically sealed with a sealing material 73 fixed to the heat insulating member 36.

  When the top sectional view of the refrigerator compartment 11 is shown in FIG. 4, most of the cold heat of the cold air passing through the side passage 28 b is not transmitted to the member 42 on the surface on the side passage 28 b side of the member 42 covering the side passage 28 b. Thus, the heat insulating member 28c is arranged. A side wall of the side passage 28b is formed by a back plate 70, and a plurality of openings 70a are provided on the side wall.

  A wall surface portion 70 c that covers the outer periphery of the member 42 is formed on the back plate 70. A plurality of discharge portions 70b communicating with the opening 70a are recessed in the wall surface portion 70c. Accordingly, the side passage 28b communicates with the refrigerating chamber 11 through the discharge portion 70b and the opening 70a, and the cool air can be discharged into the refrigerating chamber 11.

  In FIG. 2, the wall surface portion 70 c is formed in the vicinity of the same height as the shelf 45 placed on the placement portion 74, so that food or the like placed on the shelf 45 does not fall onto the discharge portion 70 b. . The opening 70a has a slit shape so that the stored item does not fall into the side passage 28b. The back plate 70 is formed with ribs 70d that guide the cool air to the discharge part 70b.

  A ceiling duct 54 is formed on the ceiling portion of the refrigerator compartment 11 by an upper plate 43 made of a resin molded product and the inner box 2b. The ceiling duct 54 is arranged side by side and communicates with the central passage 28a. The cold air passing through the central passage 28 a is diffused left and right by ribs 70 e formed on the back plate 70 and guided to the ceiling duct 54.

  Then, a plurality of ceiling discharge portions 43 a provided in the front-rear direction of the upper surface plate 43 can be dispersed left and right to discharge cool air. Since the cold air passing through the central passage 28a is diffused to the left and right before flowing into the ceiling duct 54, the cold air is sufficiently discharged also from the ceiling discharge portion 43a provided near the back plate 70 of the refrigerator compartment 11. An illumination lamp 51 covered with a transparent illumination cover 53 is provided between the left and right ceiling ducts 54.

  In the refrigerator 1 having the above configuration, when the blower 22 is driven, the air in the freezer compartment 13 is guided to the cold air passage 23 from the outlet 13b. The air is cooled by exchanging heat with the cooler 21 and flows into the freezer compartment 13 from the inlet 13a. Thereby, the inside of the freezer compartment 13 is cooled.

  When the blowers 26 and 29 are driven, the air in the vegetable compartment 12 is guided to the cold air passage 27 from the outlet 12b. The air is cooled by exchanging heat with the cooler 25 to generate cold air. A part of the cold air flows into the ice greenhouse 14 from the openings 35a and 36a. Thereby, the inside of the ice greenhouse 14 is cooled to −1 ° C., for example.

  The other cold air branches into the central passage 28a and the side passage 28b and proceeds. The cold air passing through the side passage 28b is guided by the rib 70d and discharged from the discharge portion 70b into the refrigerator compartment 11. The cold air passing through the central passage 28a is mixed with the air in the refrigerator compartment 11 guided from the opening 41a to the central passage 28a. And it passes through the ceiling duct 54 and is discharged from the ceiling discharge part 43a.

  A part of the cold heat generated by the cold air flowing through the central passage 28a is transmitted to the member 42, and is released as cold heat from the entire surface including the front surface of the side passage 28b. Therefore, the inside of the refrigerator compartment 11 is efficiently and uniformly cooled by the cold heat from the member 42 and the cold air that is dispersed and discharged from the discharge portion 70b and the ceiling discharge portion 43a.

  The air in the refrigerator compartment 11 passes between the shelves 45 and the front of the shelves 45, circulates through the cold air passage 30 from below the ice greenhouse 14 through the opening 32 a, and flows into the front of the vegetable compartment 12. Furthermore, the inside of the vegetable compartment 12 is cooled through the lower side from the front surface of the storage container 54. Then, the cool air circulates through the outlet 12b to the lower part of the cooler 25.

  The compressor 20 and the blower 26 are operated and stopped based on the detection result of a temperature sensor (not shown), and the temperatures of the refrigerator compartment 11 and the vegetable compartment 12 are maintained at 3 ° C., for example.

  When the cooling by the cooler 25 is stopped and one or both of the fans 26 and 29 are operated, the cold air passing through the central passage 28 a is cooled by the cold heat accumulated in the member 42. The inside of the refrigerator compartment 11 is cooled by the cold air. When the blower 26 is operated, the cooler 25 can be further defrosted to humidify the refrigerator compartment 11.

  According to the present embodiment, a part of the cold heat of the cold air passing through the central passage 28a conducts heat through the member 42 functioning as a heat conduction plate, and is discharged into the refrigerator compartment 11 from the entire surface. Therefore, the refrigerator compartment 11 is uniformly cooled by the cold heat uniformly discharged from a large area covering the central passage 28a and the side passage 28b.

  At this time, not much cold heat is transmitted to the member 42 from the cold air passing through the side passage 28b by the heat insulating member 28c. For this reason, when a lot of cool air flows through the cool air passage 27, condensation of the member 42 and the discharge portion 70b can be prevented. And the cold air of desired temperature and flow volume can be distribute | circulated by changing the area which installs the heat insulation member 28c.

  Further, when the temperature of the cold air passing through the cold air passage 28 is lowered or the cooling capacity is increased by increasing the flow rate of the cold air, there is a possibility that dew condensation may occur on the refrigerating chamber 11 side of the member 42 near the central passage 28a. In order to reduce the cooling by the cool air of 42, a thin heat insulating member may be provided on the member 42 side of the central passage 28a.

  Moreover, since the discharge part 70b and the ceiling discharge part 43a are provided with two or more by the back surface and upper surface of the refrigerator compartment 11, cold air disperse | distributes and flows into the refrigerator compartment 11. FIG. For this reason, the refrigerator compartment 11 is cooled uniformly and rapidly.

  Although the discharge part 70b may be formed by opening the member 42, it is desirable to provide the discharge part 70b around the outside of the member 42 as in the present embodiment. That is, since it does not open to the front side, first, the cool air passage 28 is covered and the aesthetic appearance is improved. Secondly, since cold air is not discharged directly to the front surface, noise in the side passage 28b and sound of the discharge air at the opening 70a are not directly emitted to the front surface, and the noise is reduced. Third, since there is no opening in the member 42, the entire surface of the member 42 contributes to the uniform release of cold heat, and the inside temperature becomes even more uniform. Available. Etc. can be obtained.

  In addition, the member 42 facing the central passage 28a is directly transmitted with cold by cold air, but the member 42 facing the side passage 28b is transmitted with cold from the central passage 28a portion. For this reason, the released cold heat is slightly reduced in the side passage 28b, and temperature variations in the refrigerator compartment 11 occur.

  For this reason, if the discharge part 70b is arranged on the central passage 28a, for example, this temperature variation becomes larger. In this embodiment, the discharge part 70b is disposed between the rib 28d forming the side wall of the central passage 28a and the side wall of the refrigerator compartment 11. It is arranged in the approximate center of Thereby, this temperature variation is reduced, and cooling by more uniform cold heat release can be performed. Further, the member 42 can take the maximum size in consideration of the arrangement of the discharge portion 70b, and the inside of the refrigerator compartment 11 can be cooled more uniformly by discharging the cold air from both the discharge portions 70b and releasing the cold heat of the member 42. .

  Further, the member 42 may be a cold storage member in which a jelly-like or liquid cold insulating material 42c as shown in FIG. 6 is enclosed by packaging materials 42f and 42g. If it does in this way, the member 42 will be cold-stored more by the cold heat | fever of the cold air which distribute | circulates the inside of the cold passage 28, and it discharge | releases as cold heat according to the temperature distribution in the refrigerator compartment 11. FIG. Therefore, the refrigerator compartment 11 is cooled uniformly.

  Furthermore, the cool storage member can absorb heat and dissipate heat while the compressor 20 is stopped or the temperature of the cool air in the cool air passage 28 varies, so that the cool air temperature in the cool air passage 28 can be maintained. At this time, since the cold storage member forms the inner wall of the refrigerator compartment 11, the space of the refrigerator compartment 11 can be widened, and the space saving of the refrigerator 1 can be achieved. More preferably, the packaging materials 42c and 42d are made of aluminum alloy or stainless steel having thermal conductivity.

  Further, the cold air generated at a low temperature by the cooler 25 is slightly heated by mixing with the air in the refrigerator compartment 11. Thereby, the dew condensation and freezing which arise in the member 42 and the ceiling discharge part 43a vicinity can be prevented more, and drying of the refrigerator compartment 11 and the vegetable compartment 12 can be prevented.

  Further, by providing a cooler 25 that cools the refrigerator compartment 11 and the vegetable compartment 12 and a cooler 21 that cools the freezer compartment 13, the temperature of the cold air flowing through the cold air passages 27 and 28 is changed to the temperature of the cold air inside the cold air passage 23. It can be set higher. Thereby, the dew condensation and icing that occur in the member 42 can be further prevented.

  Further, the member 42 is erected on the back surface of the refrigerator compartment 11 and extends in the vertical direction. For this reason, when the heat insulation door 3 is frequently opened and closed and the temperature and humidity in the refrigerator compartment 11 are extremely increased, even if condensation occurs on the member 42 and water droplets are generated, they are not directly dropped on the stored items. Therefore, a good preservation state can be maintained without damaging the stored product.

  At this time, when the blowing of the cold air in the cold air passage 28 cooled by the cooler 25 is stopped, the member 42 approaches the temperature in the refrigerator compartment 11 and the inside of the refrigerator compartment 11 is dried due to the temperature rise. Thereby, part of the water droplets evaporates while flowing down the member 42 and the back plate 35. Therefore, the humidity in the refrigerator compartment 11 can be raised again. Furthermore, if a fence-like protective wall having a porous shape (for example, an oval hole, a round hole, etc.) capable of air circulation is provided in front of the member 42, the member 42 can be further thinned. It also prevents sticking and breakage.

  Next, FIG. 9 is a side sectional view showing the refrigerator of the second embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. In the refrigerator 1, an inner box 2b is arranged inside an outer box 2a that covers the outside, and a gap between the outer box 2a and the inner box 2b is filled with a heat insulating material 2c such as urethane foam. The inside of the refrigerator 1 is divided into the refrigerator compartment 11, the vegetable compartment 12, and the freezer compartment 13 in order from the top.

  The vegetable compartment 12 and the freezer compartment 13 are partitioned by a partition frame 17 made of a heat insulating member and a partition plate 19 made of a heat insulating member, and the freezer compartment 13 is further partitioned into an upper part and a lower part by a partition frame 18 made of a heat insulating member. . The refrigerator compartment 11 and the vegetable compartment 12 are partitioned by a partition frame 16 made of a heat insulating member and partition plates 31 and 32 made of a resin molded product. The partition plate 32 is provided with a through hole 32a.

  An ice greenhouse 14, which is an isolation room partitioned by a partition plate 46, is provided at the lower part of the refrigerator compartment 11. The refrigerator compartment 11 is provided with a plurality of shelves 45. The front surface of the refrigerator compartment 11 can be opened and closed by a rotating heat insulating door 3. The upper part of the vegetable compartment 12, the freezer compartment 13, and the lower part of the freezer compartment 13 can be opened / closed by heat-insulating doors 4, 5, 6 with sliding front surfaces, respectively, and the storage containers 54, 55, 56 can be drawn out. ing.

  A compressor 20 is disposed at the rear of the freezer compartment 13. A condenser (not shown) is connected to the compressor 20 via a discharge pipe 20a, and a cooler 21 is connected via a suction pipe 20b. The condenser and the cooler 21 are connected via a capillary tube (not shown).

  Thus, a refrigeration cycle is configured, and the cooler 21 is cooled when the refrigeration cycle operation is performed. A defrost heater 62 that defrosts the cooler 21 is provided below the cooler 21. Reference numeral 64 denotes a drain receiving member.

  The cooler 21 is disposed in the cool air passage 23, and the lower portion of the cool air passage 23 is formed by an inner box 2b and an evaporative cover 33 made of a resin molded product. A blower 22 is disposed above the cooler 21 in the cool air passage 23. The cold air passage 23 communicates with the freezer compartment 13 through the inlets 13a and 13c provided in the back plate 33a and the outlet 13b provided in the outlet cover 33b.

  The back of the vegetable compartment 12 is covered with the aforementioned partition plate 19, and the pressure chamber 23 a above the cool air passage 23 is formed by the evaporation cover 33 and the partition plate 19. The partition plate 19 made of a heat insulating member prevents overcooling of the vegetable compartment 12 provided in the vicinity of the cooler 21.

  The cold air passage 23 communicates with a cold air passage 28 disposed above the blower 22 via a damper 65. The lower part of the cold air passage 28 is formed by a heat insulating member 36 fixed to the back plate 35 of the ice greenhouse 14 and the inner box 2b. As shown in FIG. 10, the back plate 35 and the heat insulating member 36 are provided with openings 35 a and 36 a at the same position. The ice greenhouse 14 communicates with the cold air passage 28 through the openings 35a and 36a.

  The cold air passage 28 is branched by a rib 28d into a central passage 28a disposed substantially at the center and side passages 28b provided on both sides of the central passage 28a. The ribs 28d are formed integrally with a back plate 70 described later.

  The upper portion of the cold air passage 28 is formed by a member 42 that forms the inner wall of the refrigerator compartment 11 and a back plate 70 provided on the inner box 2b. As in the first embodiment, the member 42 is formed of a heat conductive member having heat conductivity such as an aluminum alloy or stainless steel.

  In the refrigerator compartment 11, as in FIG. 4 described above, a heat insulating member 28 c is arranged on the inner surface of the member 42 covering the side passage 28 b so that most of the cold heat of the cold air passing through the side passage 28 b is not transmitted to the member 42. ing. A side wall of the side passage 28b is formed by a back plate 70, and a plurality of openings 70a are provided on the side wall.

  A wall surface portion 70 c that covers the outer periphery of the member 42 is formed on the back plate 70. A plurality of discharge portions 70b communicating with the opening 70a are recessed in the wall surface portion 70c. Accordingly, the side passage 28b communicates with the refrigerating chamber 11 by the discharge portion 70b and the opening 70a, and the cool air can be discharged into the refrigerating chamber 11.

  The wall surface portion 70c is formed in the vicinity of the same height as the shelf 45 placed on the placement portion 74, so that food or the like placed on the shelf 45 does not fall onto the discharge portion 70b. The back plate 70 is formed with ribs 70d that guide the cool air to the discharge part 70b. The opening 70a has a slit shape so that the stored item does not fall into the side passage 28b.

  A ceiling duct 54 is formed on the ceiling portion of the refrigerator compartment 11 by an upper plate 43 made of a resin molded product and the inner box 2b. The ceiling duct 54 is arranged side by side and communicates with the central passage 28a. The cold air passing through the central passage 28 a is diffused left and right by ribs 70 e formed on the back plate 70 and guided to the ceiling duct 54.

  Then, the ceiling discharge part 43a provided on the upper surface plate 43 can disperse the left and right to discharge cool air. An illumination lamp 51 covered with a transparent illumination cover 53 is provided between the left and right ceiling ducts 54.

  In the refrigerator 1 having the above configuration, when the blower 22 is driven, the air in the freezer compartment 13 is guided to the cold air passage 23 from the outlet 13b. The air is cooled by exchanging heat with the cooler 21 and flows into the freezer compartment 13 through the inlets 13a and 13c. Thereby, the inside of the freezer compartment 13 is cooled.

  Further, the cold air that has exchanged heat with the cooler 21 flows through the cooling passage 28 via the damper 65. A part of the cold air flows into the ice greenhouse 14 from the openings 35a and 36a. Thereby, the inside of the ice greenhouse 14 is cooled to −1 ° C., for example.

  The other cold air branches into the central passage 28a and the side passage 28b and proceeds. The cold air passing through the side passage 28b is guided by the rib 70d and discharged from the discharge portion 70b into the refrigerator compartment. The cold air passing through the central passage 28a passes through the ceiling duct 54 and is discharged from the ceiling discharge portion 43a.

  A part of the cold heat generated by the cold air flowing through the central passage 28a is transmitted to the member 42, and is released as cold heat from the entire surface including the front surface of the side passage 28b. Therefore, the inside of the refrigerator compartment 11 is efficiently and uniformly cooled by the cold heat from the member 42 and the cold air that is dispersed and discharged from the discharge portion 70b and the ceiling discharge portion 43a.

  The air in the refrigerator compartment 11 passes between the shelves 45 and the front of the shelves 45, circulates through the cold air passage 30 from below the ice greenhouse 14 through the opening 32 a, and flows into the front of the vegetable compartment 12. Furthermore, the inside of the vegetable compartment 12 is cooled through the lower side from the front surface of the storage container 54. Then, the cool air circulates from the outlet (not shown) through the duct (not shown) to the lower part of the cooler 21. The damper 65 opens and closes according to the temperature of the refrigerator compartment 11, and maintains the temperature of the refrigerator compartment 11 and the vegetable compartment 12 at 3 degreeC, for example.

  According to the present embodiment, as in the first embodiment, the member 42 functions as a heat conduction plate that conducts a part of the cold air passing through the central passage 28 a and releases it into the refrigerating chamber 11. Therefore, the refrigerator compartment 11 is uniformly cooled by the cold heat uniformly discharged from a large area.

  At this time, most of the cold heat is not transmitted to the member 42 from the cold air passing through the side passage 28b by the heat insulating member 28c. For this reason, even if a lot of cool air flows through the cool air passage 27, condensation does not occur in the member 42 and the discharge portion 70b. By changing the area where the heat insulating member 28c is installed, cold air having a desired temperature and flow rate can be circulated.

  Further, by providing the discharge portion 70b around the outside of the member 42, it is possible to improve aesthetics, prevent noise, emit uniform cold heat from the entire surface, and use the light widely as a light reflecting surface. And since the discharge part 70b is distribute | arranged to the approximate center between the rib 28d which comprises the side wall of the center channel | path 28a, and the side wall of the refrigerator compartment 11, temperature variation is reduced and more uniform cooling can be performed. The member 42 may be a cold storage member as shown in FIG.

  When the blower 29 shown in FIG. 3 is provided in the central passage 28a of the present embodiment, the cold air in the refrigerator compartment 11 and the cold air passing through the central passage 28a are mixed, and the same effect as in the first embodiment can be obtained. it can.

  The first and second embodiments are embodiments in which the cold air passage 28 is divided into three parts, that is, the central passage 28a and the two side passages 28b, but the cold air passage 28 is divided into four or more branch passages. The same effect can be obtained even when a heat insulating material is provided at an appropriate position according to the amount of cold air supplied. For example, the cold air passage 28 is divided into five parts, and a heat insulating member is provided in the same manner as described above in addition to the central part. And you may make it cool air which goes up through the channel | path of the center side among 2 channel | paths of right and left to descend | fall through the channel | path outside, and to discharge in the refrigerator compartment 11. FIG.

  In the present invention, when a part of the cold heat by the cold air passing through the cold air passage is released into the storage chamber through the member, a part of the cold air passing through the cold air passage absorbs heat from the member to cool the member, It means that the member absorbs heat from the storage chamber and cools the storage chamber.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2a Outer box 2b Inner box 3, 4, 5, 6 Heat insulation door 11 Refrigeration room 12 Vegetable room 13 Freezing room 14 Ice greenhouse 20 Compressor 21, 25 Cooler 22, 26, 29 Blower 23, 27, 28, 30 Cold air passage 28a Central passage (second passage)
28b Side passage (first passage)
28c Heat insulation member 36 Heat insulation member 42 Member 50 Deodorization part 51 Illumination lamp 53 Illumination cover 54 Ceiling duct 61, 62 Defrosting heater 65 Damper 70 Back plate

Claims (5)

A storage room for storing stored items;
A cooler for generating cold air flowing into the storage chamber;
A cold air passage extending in the vertical direction on the back surface of the storage chamber and through which the cold air from the cooler flows;
A member formed of a heat conductive plate that is provided in at least a part of the back side of the storage chamber and emits cold heat to a region occupied by a plurality of shelves provided in the storage chamber;
A heat insulating member arranged on the upstream side of the cooler air flow on the cooler side than the member, and provided on the wall on the storage chamber side of the cold air passage on the back side of the storage chamber;
A refrigerator comprising a discharge port for discharging cold air flowing through the cold air passage to the storage chamber.   The refrigerator according to claim 1, wherein the discharge port discharges cold air from above the storage chamber.   The refrigerator according to claim 1 or 2, further comprising a discharge unit that discharges the cold air flowing through the cold air passage from the side of the member to the vicinity of the member.   The refrigerator according to any one of claims 1 to 3, further comprising a ceiling duct that communicates with the cold air passage and is arranged along a ceiling portion of the storage chamber.   The refrigerator according to any one of claims 1 to 4, wherein the member is provided with an uneven shape by press working.

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