JP2010091203A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of improving air blowing efficiency and cooling efficiency. <P>SOLUTION: The refrigerator includes: a cooler 11 for generating cold air; a first duct 21 which is extended vertically along the wall face of a storage compartment 2 and where the cold air generated by the cooler 11 is made to flow from the lower side to the upper side; a pressure chamber 21d provided in the upper part of the first duct 21 and expanding the width of a flow passage with respect to the lower part of the first duct 21; and first discharge ports 31L, 31R formed at the first duct 21 downstream of the pressure chamber 21d and discharging the cold air to the upper side of the storage compartment 2. The first duct 21 between the pressure chamber 21d and the first discharge ports 31L, 31R is set narrower with respect to the pressure chamber 21d. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a refrigerator that discharges cold air from a discharge port formed in a duct to a storage room.

  A conventional refrigerator is disclosed in Patent Document 1. In this refrigerator, a cooler is disposed below the refrigerator compartment, and a duct through which cool air generated by the cooler flows is provided on the back of the refrigerator compartment. The duct is provided with a plurality of outlets arranged vertically, and cool air flowing into the duct from the cooler by driving the blower is sequentially discharged into the refrigerator compartment from the outlet arranged below. Thereby, the refrigerator compartment is cooled.

Japanese Patent Laid-Open No. 5-60446 (pages 3 to 4 and FIG. 2)

  However, according to the conventional refrigerator, the flow rate of the cool air flowing through the duct is increased in order to allow the cool air to reach the upper discharge port. For this reason, there existed a problem that the ventilation resistance in a duct increased, the airflow discharged from a discharge outlet was disturbed, and ventilation efficiency fell. In addition, since the amount of cool air discharged from the lower discharge port is increased, cooling in the storage chamber becomes non-uniform, resulting in a problem that cooling efficiency is lowered.

  An object of this invention is to provide the refrigerator which can improve ventilation efficiency and cooling efficiency.

  In order to achieve the above object, the present invention includes a cooler that generates cold air, a first duct that extends vertically along the wall surface of the storage chamber, and from which the cool air generated by the cooler flows upward from below. A pressure chamber provided at an upper portion of one duct to widen a flow path with respect to a lower portion of the first duct; and a first pressure chamber provided in a first duct downstream from the pressure chamber for discharging cold air to the upper portion of the storage chamber. And a first duct between the pressure chamber and the first discharge port is narrower than the pressure chamber.

  According to this configuration, the cold air generated by the cooler flows into the first duct from below and rises. The cold air flowing through the first duct is converted into static pressure in the pressure chamber with the expanded flow path, and the flow velocity is reduced. The cold air flowing out from the pressure chamber flows through the first duct having a narrower flow path than the pressure chamber, and the static pressure is converted into dynamic pressure and accelerated. The accelerated cool air is discharged from the first discharge port to the upper part of the storage chamber.

  Moreover, the present invention is characterized in that, in the refrigerator having the above-described configuration, a plurality of the pressure chambers are arranged in the vertical direction. According to this configuration, the cool air rising up the first duct flows through the plurality of pressure chambers, and the dynamic pressure is converted to static pressure.

  Moreover, the present invention is characterized in that, in the refrigerator having the above-described configuration, the pressure chambers adjacent in the vertical direction communicate with each other through a communication portion that narrows the flow path. According to this configuration, the cold airflow is decelerated in the lower pressure chamber, and is further decelerated when it flows into the upper pressure chamber via the communicating portion.

  In the refrigerator having the above-described configuration, the first duct includes a displacement portion that is biased in one of the left and right directions at a lower portion of the storage chamber, and the lower pressure chamber is provided in the displacement portion and the upper portion is The pressure chamber is arranged substantially in the center in the left-right direction, and the first discharge ports are respectively provided on the left and right of the storage chamber.

  According to this configuration, the displacement portion of the first duct is arranged to be deviated to the right of the storage chamber, for example, and the lower pressure chamber is arranged to be deviated to the right. The upper pressure chamber that communicates with the lower pressure chamber is arranged at the approximate left and right centers. The cool air flowing through the first duct meandering left and right by the upper and lower pressure chambers is decelerated in the lower pressure chamber, flows into the upper pressure chamber, further decelerates, and is discharged from the left and right first discharge ports.

  Moreover, the present invention is characterized in that in the refrigerator configured as described above, an isolation chamber is provided in front of the displacement portion, and the inside of the isolation chamber is maintained at a lower temperature than the outside. According to this structure, the cold heat | fever of the cold air | gas which distribute | circulates a deviation part is discharge | released to a low temperature isolation chamber.

  According to the present invention, in the refrigerator having the above-described configuration, a second duct branched from the pressure chamber via a constricted portion narrowing a flow path below the first discharge port, and a second discharge port disposed in the second duct. It is characterized by having. According to this configuration, a part of the cold air flowing through the first duct flows into the second duct through the flow path constricted by the constricted portion, and the dynamic pressure is converted into the static pressure to further reduce the flow velocity. The cold air whose flow rate has decreased is discharged from the second discharge port into the storage chamber. A plurality of second ducts may be provided, and a plurality of second discharge ports may be provided in one second duct.

  According to the present invention, in the refrigerator having the above-described configuration, a member made of a good thermal conductor disposed on the front surface of the pressure chamber is provided. According to this configuration, the cold heat of the cold air flowing through the pressure chamber is released from the member into the storage chamber.

  According to the present invention, the pressure chamber that widens the flow path is provided in the upper portion of the first duct, the first discharge port is disposed downstream of the pressure chamber, and the first duct between the pressure chamber and the first discharge port is provided. Since it is made narrower than the pressure chamber, the cold air flowing through the first duct is rectified by converting the static pressure into dynamic pressure in the upper pressure chamber, lowering the flow velocity, and lowering the ventilation resistance. In addition, since the distance between the pressure chamber arranged at the upper portion and the first discharge port is short, the turbulence of the air flow that is accelerated and guided to the first discharge port without increasing the ventilation resistance is suppressed. Therefore, the disturbance of the airflow discharged from the first discharge port at the upper part of the storage chamber can be reduced, and the blowing efficiency can be improved. In addition, a large amount of cool air is supplied from the upper part of the storage chamber, and the storage chamber can be easily cooled uniformly. Therefore, the storage chamber can be uniformly cooled to improve the cooling efficiency.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the refrigerator of the first embodiment. The refrigerator 1 has a plurality of storage rooms, and a refrigerator compartment 2, a freezer compartment 3, and a vegetable compartment 4 are arranged in this order from above.

  2 and 3 show a right side sectional view and a front sectional view of the refrigerator 1. The front of the refrigerator compartment 2, the freezer compartment 3, and the vegetable compartment 4 are opened and closed by doors 2d, 3d, and 4d, respectively. The refrigerator compartment 2 and the freezer compartment 3 are partitioned by a heat insulating wall 7, and the freezer compartment 3 and the vegetable compartment 4 are partitioned by a heat insulating wall 8. A machine room 5 is provided behind the vegetable room 4, and a compressor 6 that operates a refrigeration cycle is installed in the machine room 5.

  A cold air passage 10 is provided behind the freezer compartment 3. A cooler 11 and a blower 12 are installed in the cold air passage 10. The cooler 11 is connected to the compressor 6 and is cooled by the operation of the refrigeration cycle, and generates heat by exchanging heat with the air flowing through the cold air passage 10.

  Storage cases 16 and 17 are arranged in the freezer compartment 3. In the cool air passage 10, discharge ports 3 a and 3 b respectively facing the storage cases 16 and 17 are opened, and a return port 3 c is opened below the storage case 17.

  On the right side of the lower part of the refrigerator compartment 2, an isolation chamber 19 is provided. The isolation room 19 is composed of a chilled room, an ice greenhouse, or the like, and the inside of the isolation room 19 is maintained at a lower temperature than the inside of the external refrigerating room 2. An illumination lamp 43 covered with an illumination cover 43 a is provided on the ceiling surface of the refrigerator compartment 2.

  A cold air passage 20 that communicates with the cold air passage 10 is provided behind the refrigerator compartment 2 via a cold air distributor 13 such as a damper. The cold air passage 20 has a main duct 21 (first duct) and sub-ducts 22L, 22R, 23L, 23R (second duct). First and second pressure chambers 21 c and 21 d are formed in the main duct 21.

  The flow path area of the first pressure chamber 21 c is enlarged with respect to the lower end portion of the main duct 21. The flow area of the second pressure chamber 21d is larger than that of the first pressure chamber 21c. The second pressure chamber 21d and the sub ducts 22L, 22R, 23L, and 23R provided at the upper part of the main duct 21 are formed by a duct panel 40 that is attached to the rear of the refrigerator compartment 2.

  The main duct 21 is provided with discharge ports 31L and 31R (first discharge ports). The sub ducts 22L and 22R are respectively provided with discharge ports 32L and 32R (second discharge ports). The sub duct 23L is provided with discharge ports 33L and 34L (second discharge ports), and the sub duct 23R is provided with discharge ports 33R and 34R (second discharge ports). By opening the damper 13, the cold air flows through the cold air passage 20, and the cold air is discharged into the refrigerator compartment 2 from the discharge ports 31 </ b> L to 34 </ b> L and 31 </ b> R to 34 </ b> R.

  The main duct 21 is provided with a discharge port 19 a for discharging cool air to the isolation chamber 19. A return port 2 a through which cool air flows out is provided at the lower back of the isolation chamber 19. The return port 2a communicates with a communication passage 41 passing through the side of the cold air passage 10, and the communication passage 41 opens to the upper part of the vegetable compartment 4 to form an inflow port 4a. A storage case 18 whose upper surface is closed is provided in the vegetable compartment 4, and a return port 4 b that opens to the front of the cool air passage 10 is provided above the storage case 18.

  FIG. 4 shows a front view of the duct panel 40. FIG. 5 is a view showing the left half of the DD cross section of FIG. The duct panel 40 is formed of a heat insulating material such as polystyrene foam or polyethylene foam, and has a front surface portion 40a that covers the front surface. A front panel 50 made of a resin molded product is disposed on the front surface of the front surface portion 40a. A member 55 made of a good heat conductor such as a metal plate (aluminum, stainless steel, etc.) is attached to the front surface of the front panel 50.

  The discharge ports 31L to 34L and 31R to 34R are formed by the openings 40h and 50h penetrating the front surface portion 40a and the front panel 50, respectively. In addition, a partition wall that partitions the main duct 21 and the sub ducts 22L, 22R, 23L, and 23R is formed by the rib 40b that protrudes from the back side of the front surface portion 40a.

  A plurality of mounting legs 55a bent rearward are provided at the left and right ends of the member 55. The front panel 50 is provided with an insertion hole 50a through which the attachment foot 55a is inserted. The tip of the mounting foot 55a inserted through the insertion hole 50a is twisted to prevent the mounting foot 55a from coming off, and the member 55 is integrated with the front panel 50. The duct panel 40 is provided with a recess 40c that avoids interference with the tip of the mounting foot 55a.

  The duct panel 40 is detachably provided from the refrigerator compartment 2 integrally with the front panel 50 and the member 55. Thereby, the main duct 21 and the sub ducts 22L, 22R, 23L, and 23R can be easily cleaned. A part of the duct panel 40 may be detachable.

  The left and right ends of the member 55 are arranged at positions overlapping the ribs 40b that partition the main duct 21 and the sub ducts 22L, 22R, 23L, and 23R when viewed from the front. For this reason, the mounting foot 55a is arranged in front of the rib 40b. As a result, a thick heat insulating layer in front of the second pressure chamber 21d can be secured, and a thick heat insulating layer in front of the sub ducts 22L, 22R, 23L, and 23R can be secured. Therefore, local dew condensation in the mounting foot 55a and the recess 40c can be prevented.

  The main duct 21 is formed in a T-shape that extends up and down on the back surface of the refrigerator compartment 2 and extends left and right at the upper end portion 21a. The discharge ports 31L and 31R are respectively provided at both ends of the upper end portion 21a whose flow path area is narrower than that of the second pressure chamber 21d. Accordingly, the flow path is narrowed from the second pressure chamber 21d toward the discharge ports 31L and 31R. The sub ducts 22L, 22R, 23L, and 23R are branched from the main duct 21 and arranged on the left and right of the main duct 21, respectively. Accordingly, the discharge ports 31L and 31R are disposed above the left and right sub-ducts 22L and 22R.

  The sub ducts 22L and 22R are adjacent below the upper end 21a, and the sub ducts 23L and 23R are adjacent below the sub ducts 22L and 22R. Discharge ports 32L and 32R are provided in the sub ducts 22L and 22R, respectively. Discharge ports 33L and 34L are arranged vertically in the sub duct 23L. Discharge ports 33R and 34R are arranged vertically in the sub duct 23R. The sub ducts 22L, 22R, 23L, and 23R and the second pressure chamber 21d of the main duct 21 communicate with each other through a constricted portion 39 in which the flow path is constricted.

  In the refrigerator 1 having the above configuration, the cold air generated by the cooler 11 is discharged into the freezer compartment 3 from the discharge ports 3 a and 3 b by driving the blower 12. The cool air discharged from the discharge ports 3a and 3b flows forward, descends in front of the storage cases 16 and 17, and flows downward under the storage case 17. The cool air passing under the storage case 17 returns to the cooler 11 through the return port 3c. Thereby, the inside of the freezer compartment 3 is cooled by the circulation of cold air.

  When the cold air distributor 13 is opened, cold air flows into the cold air passage 20. A part of the cool air flowing through the cool air passage 20 is discharged into the isolation chamber 19 from the discharge port 19a. The cool air discharged into the isolation chamber 19 circulates around the storage case 15 and flows out from the return port 2a. The cool air immediately after flowing into the cool air passage 20 from the cool air distributor 13 is maintained at a low temperature. For this reason, by providing the discharge port 19a, the isolation chamber 19 can be easily kept at a low temperature.

  The main duct 21 gradually expands above the discharge port 19a to form a first pressure chamber 21c in which the flow path is widened. A part of the cool air rising from the discharge port 19a in the cool air passage 20 is converted from dynamic pressure to static pressure by the expansion of the flow path in the first pressure chamber 21c, and the flow rate of the cool air is lowered. Further, the flow path is further widened in the second pressure chamber 21d, and the flow rate of the cold air flowing through the second pressure chamber 21d is further reduced.

  In the upper end portion 21a of the main duct 21, the flow path toward the discharge ports 31L and 31R is narrower than the second pressure chamber 21d. For this reason, the static air that has reached the upper surface of the main duct 21 is converted into a dynamic pressure at the upper end portion 21a. Thereby, the cold air with the increased flow velocity is discharged from the discharge ports 31L and 31R (first discharge ports).

  Accordingly, in the first and second pressure chambers 21c and 21d in the middle portion below the upper end portion 21a of the main duct 21, the flow velocity is low, the flow resistance is reduced, and the blowing efficiency is improved. For this reason, much cold air can be efficiently discharged from the discharge ports 31L and 31R provided in the upper part of the refrigerator compartment 2, and the refrigerator compartment 2 can be cooled uniformly. The cool air discharged from the discharge ports 31L and 31R flows forward on both sides of the illumination cover 43a along the ceiling surface, and descends near the door 2d of the refrigerator compartment 2.

  A part of the cold air flowing through the second pressure chamber 21d of the main duct 21 flows into the sub ducts 22L, 22R, 23L, 23R. Since the sub ducts 22L, 22R, 23L, and 23R branch from the second pressure chamber 21d through the narrowed portion 39, the amount of cold air discharged from the discharge ports 32L to 34L and 32R to 34R (second discharge ports) is small. This reduces the cool air that is blown directly onto the store.

  Further, since the volume of the cold air flowing into the sub ducts 22L, 22R, 23L, and 23R from the constricted portion 39 suddenly expands, the dynamic pressure is further converted into static pressure and the flow velocity is reduced. Thereby, the sub ducts 22L, 22R, 23L, and 23R themselves also function as pressure chambers, and uniform and low-speed cold air is discharged from the discharge ports 32L to 34L and 32R to 34R. This further reduces the cool air that is blown directly onto the store.

  If the discharge ports 32L to 34L and 32R to 34R are provided at positions away from the constricted portion 39, the cool air speed can be further reduced. For example, the narrowed portions 39 of the sub ducts 22L and 22R may be provided below, and the discharge ports 32L and 32R may be disposed at the upper ends of the sub ducts 22L and 22R. Further, when the narrowed portion 39 of the sub ducts 23L and 23R is provided at the center in the vertical direction, the discharge ports 33L and 33R are arranged at the upper ends of the sub ducts 23L and 23R, and the discharge ports 34L and 34R are arranged at the lower ends of the sub ducts 23L and 23R. Good.

  The cool air discharged at low speed from the discharge ports 32L to 34L and 32R to 34R moves forward around the stored product at a low speed to cool the stored product. Further, while moving at a low speed, a part of the cool air descends and cools the stored items below the discharge ports 32L to 34L and 32R to 34R. The cold air reaches the vicinity of the door 2d in front of the refrigerator compartment 3, and merges with the cold air discharged from the discharge ports 31L and 31R and reaching the vicinity of the door 2d. Cold air descending in the vicinity of the door 2d of the refrigerating chamber 3 flows under the storage case 15 of the isolation chamber 19, and flows out from the return port 2a together with the cool air discharged into the isolation chamber 19.

  The cold air flowing out from the return port 2a flows through the communication passage 41 and flows into the vegetable compartment 4 from the inflow port 4a. The cold air flowing into the vegetable compartment 4 circulates around the storage case 18 whose upper surface is closed. Thereby, the stored item in the storage case 18 is indirectly cooled. The cold air that has circulated around the storage case 18 returns to the cooler 11 through the return port 4b.

  Further, some of the cool air discharged from the discharge ports 32L to 34L and 32R to 34R comes into contact with the member 55 disposed in the vicinity of the discharge ports 32L to 34L and 32R to 34R. Thereby, the cold heat of cold air is transmitted to the member 55, and the cold heat is released to the refrigerator compartment 2 from a wide range on the back surface. Therefore, the inside of the refrigerator compartment 2 can be cooled uniformly. Further, since the isolation chamber 19 is maintained at a low temperature, cold heat is released from the isolation chamber 19 into the refrigerating chamber 2 and the refrigerating chamber 2 is indirectly cooled.

  Note that when the amount of cold air flowing through the second pressure chamber 21d is small, the member 55 is less likely to dew. For this reason, a part of front part 40a and front panel 50 of duct panel 40 may be formed thinly, and a part of front part 40a and front panel 50 may be omitted. Thereby, the cold air flowing through the main duct 21 contacts the member 55, and the cold heat of the cold air transmitted to the member 55 is released to the refrigerator compartment 2.

  Further, by omitting a part of the front surface portion 40a made of a heat insulating material, the volume inside the refrigerator compartment 2 can be increased and the volume efficiency can be improved. In addition, when the front surface portion 40a is made of a foamed resin, the foaming time is shortened, and productivity and quality can be improved.

  Further, the surface of the member 55 may be provided with a convex portion or a concave portion by bending or drawing. Thereby, the light of the illumination lamp 43 is reflected and scattered by the convex part and the concave part, and the inside of the refrigerator compartment 2 can be illuminated more brightly. Further, when dew condensation occurs on the surface of the member 55 due to the inflow of outside air due to the opening of the door 2a, the dew condensation water is held by the convex portions and the concave portions. Thereby, the dew condensation water hold | maintained at the convex part or the recessed part is evaporated gradually, and the inside of the refrigerator compartment 2 can be moisturized.

  According to the present embodiment, the second pressure chamber 21d that widens the flow path is provided in the upper part of the main duct 21 (first duct), and the discharge ports 31L and 31R (first discharge ports) are provided downstream of the second pressure chamber 21d. The upper end 21a of the main duct 21 between the second pressure chamber 21d and the discharge ports 31L and 31R is narrower than the second pressure chamber 21d.

  As a result, the cold air flowing through the main duct 21 is rectified by converting the static pressure into the dynamic pressure in the upper second pressure chamber 21d, the flow velocity is lowered, and the ventilation resistance is lowered. In addition, since the distance between the second pressure chamber 21d disposed at the upper portion and the discharge ports 31L and 31R is short, the turbulence of the airflow that is accelerated and guided to the discharge ports 31L and 31R without increasing the ventilation resistance is suppressed. . Therefore, the disturbance of the airflow discharged from the discharge ports 31L and 31R at the upper part of the storage chamber can be reduced, and the blowing efficiency can be improved. In addition, a large amount of cold air is supplied from the upper part of the refrigerator compartment 2, and the inside of the refrigerator compartment 2 can be easily cooled uniformly. Therefore, the refrigerator compartment 2 can be uniformly cooled to improve the cooling efficiency.

  In addition, since the plurality of pressure chambers (first and second pressure chambers 21c, 21d) are arranged in the vertical direction, the flow rate of the cold air flowing through the main duct 21 is further reduced to further reduce the turbulence of the air flow. it can.

  In addition, the discharge ports 32L to 34L and 32R to 34R (second ports) branch to the sub ducts 22L, 22R, 23L, and 23R that branch from the second pressure chamber 21d through the narrowed portion 39 that narrows the flow path below the discharge ports 31R and 31L. Since the sub-ducts 22L, 22R, 23L, and 23R function as pressure chambers, the flow rate of the cool air discharged from the discharge ports 32L to 34L and 32R to 34R is further reduced. Thereby, deterioration of the stored matter by cold air colliding directly with the stored matter from the discharge ports 32L to 34L and 32R to 34R can be reduced.

  Further, the flow rate of the cool air from the second pressure chamber 21d toward the discharge ports 31R and 31L increases, and a lot of cool air is discharged from the discharge ports 31R and 31L to the vicinity of the ceiling of the refrigerator compartment 2. Thereby, the cold air discharged from the discharge ports 31L and 31R flows through the ceiling portion of the refrigerator compartment 2 and flows around the door 2d by its own weight. And the cooling of the center part of the up-down direction of the refrigerator compartment 2 is supplemented with the small amount of low-speed cold air current discharged from the discharge ports 32L-34L and 32R-34R. Therefore, the inside of the refrigerator compartment 2 can be cooled more uniformly and the cooling efficiency of the refrigerator 1 can be improved.

  Further, since the upper end portion 21a of the main duct 21 is formed to extend left and right, and the discharge ports 31L and 31R are provided at the left and right ends of the upper end portion 21a, the flow from the second pressure chamber 21d to the discharge ports 31L and 31R. The flow path area of the path can be easily reduced. Further, it is possible to discharge cold air from a wide range in the left-right direction of the refrigerating chamber 2 so as to reach the entire refrigerating chamber 2. Therefore, the refrigerator compartment 2 can be cooled more uniformly.

  In addition, since the member 55 made of a good thermal conductor is disposed on the front surface of the second pressure chamber 21d, the cold air discharged from the discharge ports 32L to 34L and 32R to 34R is transmitted to the member 55. Therefore, cold heat is released from a wide range by the member 55, and the refrigerator compartment 2 can be more uniformly cooled to improve the cooling efficiency of the refrigerator 1.

  Further, since the discharge ports 32L to 34L and 32R to 34R are arranged in the vicinity of the member 55, the cold heat discharged from the discharge ports 32L to 34L and 32R to 34R can be easily transmitted to the member 55. In addition, the member 55 may be extended to the vicinity of the discharge ports 31L and 31R arranged in the upper portion, and the cold heat of the cold air discharged from the discharge ports 31L and 31R may be transmitted to the member 55.

  In addition, it is more desirable that the flow path area of the narrowed portion 39 is narrower than the opening areas of the discharge ports 32L to 34L and 32R to 34R. That is, the narrowed portion 39 is further narrowed, and the cool air discharged from the discharge ports 32L to 34L and 32R to 34R can be further reduced. Further, the sub ducts 22L, 22R, 23L, and 23R increase the volume more rapidly, and the flow rate of the cold air can be made uniform. In addition, since the discharge ports 32L to 34L and 32R to 34R are widened, it is possible to reduce blockage of the discharge ports 32L to 34L and 32R to 34R due to stored items.

  Next, a second embodiment will be described. This embodiment differs in the structure of the cold air | gas channel | path 20 with respect to 1st Embodiment shown in above-mentioned FIGS. Other parts are the same as those in the first embodiment. 6 shows a front view of the duct panel 40 of the present embodiment, and FIG. 7 shows a cross-sectional view taken along the line AA of FIG. For convenience of explanation, the same parts as those in the first embodiment are denoted by the same reference numerals.

  The duct panel 40 has a front surface portion 40a (see FIG. 5) that covers the front surface, and a front panel 50 (see FIG. 5) is disposed on the front surface of the front surface portion 40a. A member 55 made of a good heat conductor is attached to the front surface of the front panel 50. The discharge ports 31L to 33L and 31R to 33R are formed by the opening portions 40h and 50h (see FIG. 5) provided in the front surface portion 40a and the front panel 50.

  Further, the main duct 21 and the sub-ducts 22L, 22R, 23L, and 23R are formed by the ribs 40b that protrude from the back side of the front surface portion 40a. The duct panel 40 is formed with a first pressure chamber 21c and a second pressure chamber 21d of the main duct 21.

  The main duct 21 extends vertically, and a deflection portion 21e is formed on the cold air inflow side of the main duct 21 that is biased to the right where the isolation chamber 19 (see FIG. 3) is disposed. The displacement portion 21e has a wider flow path with respect to the main duct 21 below the duct panel 40 to form a first pressure chamber 21c. The second pressure chamber 21d adjacent to the upper side of the first pressure chamber 21c is further widened with respect to the first pressure chamber 21c, and is disposed at the approximate center in the left-right direction.

  Discharge ports 19 a for discharging cool air to the isolation chamber 19 are provided at the left and right ends of the lower portion of the main duct 21. As a result, cold air is discharged from the discharge port 19a into the isolation chamber 19, and cold heat of the cold air is released from the displacement portion 21e. Therefore, the isolation chamber 19 can be easily maintained at a low temperature, and the cooling efficiency of the refrigerator 1 can be improved.

  The upper end portion 21a of the main duct 21 extends left and right, and the upper surface of the main duct 21 is formed with an inclined surface 21b extending upward from below toward the discharge ports 31L and 31R. The inclined surface 21b can easily narrow the flow path area of the upper end portion 21a between the second pressure chamber 21d and the discharge ports 31L and 31R.

  The discharge ports 31L and 31R are respectively provided at both ends of the upper end portion 21a. The sub ducts 22L, 22R, 23L, and 23R are respectively branched from the second pressure chamber 21d of the main duct 21 and arranged on the left and right of the main duct 21. Accordingly, the discharge ports 31L and 31R are disposed above the left and right sub-ducts 22L and 22R.

  The sub ducts 22L and 22R are adjacent below the upper end 21a, and the sub ducts 23L and 23R are adjacent below the sub ducts 22L and 22R. Discharge ports 32L and 32R are provided in the sub ducts 22L and 22R, respectively. Discharge ports 33L and 33R are arranged in the sub ducts 23L and 23R, respectively. The sub ducts 22L, 22R, 23L, and 23R and the main duct 21 communicate with each other through a narrowed portion 39 in which a flow path is narrowed.

  In addition, a sub-duct narrowed portion 44 is provided in the sub-duct 22L in which the flow path between the discharge port 32L and the narrowed portion 39 is narrowed. Similarly, the sub duct 22R is provided with a sub duct narrowing portion 44 in which the flow path between the discharge port 32R and the narrowing portion 39 is narrowed.

  A guide portion 45 protrudes from the left side wall at the top of the main duct 21. Since the cold air inflow side of the main duct 21 is biased to the right, the amount of cold air rising along the left side wall is reduced. However, the guide portion 45 can guide the cold air to the sub ducts 22L and 23L. Therefore, the amount of cold air discharged from the left and right discharge ports 32L, 32R, 33L, 33R can be made uniform.

  According to the present embodiment, the second pressure chamber 21d that widens the flow path is provided in the upper part of the main duct 21 (first duct) as in the first embodiment, and the discharge port 31L, downstream of the second pressure chamber 21d, 31R (first discharge port) is arranged, and the upper end portion 21a of the main duct 21 between the second pressure chamber 21d and the discharge ports 31L and 31R is narrower than the second pressure chamber 21d.

  As a result, the cold air flowing through the main duct 21 is rectified by converting the static pressure into the dynamic pressure in the upper second pressure chamber 21d, the flow velocity is lowered, and the ventilation resistance is lowered. In addition, since the distance between the second pressure chamber 21d disposed at the upper portion and the discharge ports 31L and 31R is short, the turbulence of the airflow that is accelerated and guided to the discharge ports 31L and 31R without increasing the ventilation resistance is suppressed. . Therefore, the disturbance of the airflow discharged from the discharge ports 31L and 31R at the upper part of the storage chamber can be reduced, and the blowing efficiency can be improved. In addition, a large amount of cold air is supplied from the upper part of the refrigerator compartment 2, and the inside of the refrigerator compartment 2 can be easily cooled uniformly. Therefore, the refrigerator compartment 2 can be uniformly cooled to improve the cooling efficiency.

  Further, a displacement portion 21e provided at the lower portion of the refrigerator compartment 2 is disposed so as to be biased in one of the left and right directions, and a low temperature isolation chamber 19 is disposed in front of the displacement portion 21e. Thereby, the cold heat of the cold air | gas which distribute | circulates the main duct 21 is discharge | released to the isolation | separation chamber 19, and the isolation | separation chamber 19 can be easily maintained at low temperature.

  In addition, the first pressure chamber 21c is provided in the displacement portion 21e, and the second pressure chamber 21d above the displacement portion 21e is provided in the approximate center in the left-right direction. As a result, the flow of cool air that is biased to the left and right is reduced in the first and second pressure chambers 21c and 21d, and is evenly distributed from the second pressure chamber 21d to the discharge ports 31L and 31R provided on the left and right sides of the refrigerator chamber 2. Can lead to cool air.

  In addition, since the deviated portion 21e of the main duct 21 is arranged to be shifted to the right, the opening area of the left discharge ports 31L, 32L, 33L is made larger than the opening area of the right discharge ports 31R, 32R, 33R. May be. Thereby, the discharge state of the left and right cold air can be made more uniform, and the cooling of the refrigerator compartment 2 can be made uniform.

  In addition, since the member 55 made of a good thermal conductor is disposed on the front surface of the second pressure chamber 21d, the cold air discharged from the discharge ports 32L, 33L, 32R, and 33R is transmitted to the member 55. Therefore, cold heat is released from a wide range by the member 55, and the refrigerator compartment 2 can be more uniformly cooled to improve the cooling efficiency of the refrigerator 1.

  Next, a third embodiment will be described. The present embodiment differs from the second embodiment shown in FIGS. 6 and 7 in the configuration of the cold air passage 20. Other parts are the same as those of the second embodiment. FIG. 8 shows a front view of the duct panel 40 of the present embodiment. For convenience of explanation, the same parts as those in the second embodiment are denoted by the same reference numerals.

  The duct panel 40 has a front surface portion 40a (see FIG. 5) that covers the front surface, and a front panel 50 (see FIG. 5) is disposed on the front surface of the front surface portion 40a. A member 55 made of a good heat conductor is attached to the front surface of the front panel 50. The discharge ports 31L to 33L and 31R to 33R are formed by the opening portions 40h and 50h (see FIG. 5) provided in the front surface portion 40a and the front panel 50.

  Further, the main duct 21 and the sub-ducts 22L, 22R, 23L, and 23R are formed by the ribs 40b that protrude from the back side of the front surface portion 40a. The duct panel 40 is formed with a first pressure chamber 21c, a second pressure chamber 21d, and a third pressure chamber 21g of the main duct 21.

  The main duct 21 meanders in the left-right direction and extends up and down, and a cold air inflow side of the main duct 21 is formed with a biased portion 21e that is biased to the right where the isolation chamber 19 (see FIG. 3) is disposed. The displacement portion 21e has a channel that is suddenly widened with respect to the main duct 21 below the duct panel 40 to form a first pressure chamber 21c.

  The first pressure chamber 20c is biased to the right, and the second pressure chamber 21d adjacent to the upper side of the first pressure chamber 21c is disposed at the approximate center in the left-right direction. The first pressure chamber 21c and the second pressure chamber 21d communicate with each other via a communication portion 21f that narrows the flow path. The communication portion 21f is arranged to be deviated to the left of the first pressure chamber 21c.

  Guide portions 45 and 46 project from the left and right ribs 40 b of the main duct 21, and a communication portion 21 h that narrows the flow path is formed between the guide portions 45 and 46. As a result, the upper wall of the second pressure chamber 21d is formed by the guide portions 45 and 46, and the second pressure chamber 21d communicates with the third pressure chamber 21g via the communication portion 21h. The third pressure chamber 21g is widened above the communication portion 21h.

  Discharge ports 19 a for discharging cool air to the isolation chamber 19 are provided at the left and right ends of the lower portion of the main duct 21. A guide portion 47 protruding from the rib 40b is provided above the left discharge port 19a. The guide portion 47 guides the cold air to the left discharge port 19a, and the first pressure chamber 21c is more rapidly widened.

  Further, since the first pressure chamber 21c is arranged to be biased to the right side, the duct panel 40 is omitted on the left side of the first pressure chamber 21c (below the discharge port 33L). Thereby, the internal volume of the refrigerator compartment 2 can be increased by the thickness of the duct panel 40, and volume efficiency can be improved. Further, when the left discharge port 19a is arranged on the right side of the state of FIG. 8, the left side of the first pressure chamber 21c becomes a unified space, and the interior can be used more effectively. Moreover, when the front surface part 40a consists of foamed resin, foaming time is shortened and productivity and quality can be improved.

  The cold air flowing through the main duct 21 is converted into a static pressure by the widening of the flow path in the first pressure chamber 21c, and the flow velocity is reduced. When the cool air rising in the first pressure chamber 21c flows into the second pressure chamber 21d via the communication portion 21f, the flow velocity further decreases due to the widening of the flow path. When the cool air rising in the second pressure chamber 21d flows into the third pressure chamber 21g via the communication portion 21h, the flow velocity further decreases due to the widening of the flow path. Then, the cold air flowing out of the third pressure chamber 21g is accelerated at the upper end portion 21a and discharged into the refrigerator compartment 2 from the discharge ports 31L and 31R (first discharge ports).

  According to the present embodiment, the third pressure chamber 21g that widens the flow path is provided in the upper part of the main duct 21 (first duct) as in the second embodiment, and the discharge port 31L, downstream of the third pressure chamber 21g, 31R (first discharge port) is arranged, and the upper end portion 21a of the main duct 21 between the third pressure chamber 21g and the discharge ports 31L and 31R is narrower than the third pressure chamber 21g.

  As a result, the cold air flowing through the main duct 21 is rectified by converting the static pressure into the dynamic pressure in the upper second pressure chamber 21d, the flow velocity is lowered, and the ventilation resistance is lowered. In addition, since the distance between the second pressure chamber 21d disposed at the upper portion and the discharge ports 31L and 31R is short, the turbulence of the airflow that is accelerated and guided to the discharge ports 31L and 31R without increasing the ventilation resistance is suppressed. . Therefore, the disturbance of the airflow discharged from the discharge ports 31L and 31R at the upper part of the storage chamber can be reduced, and the blowing efficiency can be improved. In addition, a large amount of cold air is supplied from the upper part of the refrigerator compartment 2, and the inside of the refrigerator compartment 2 can be easily cooled uniformly. Therefore, the refrigerator compartment 2 can be uniformly cooled to improve the cooling efficiency.

  In addition, the first, second, and third pressure chambers 21c, 21d, and 21g that are adjacent to each other in the vertical direction communicate with each other through the communication portions 21f and 21h that narrow the flow path, so that the first, second, and third pressure chambers 21c, It is not necessary to gradually increase the flow path areas of 21d and 21g. For this reason, the flow passage area of the first pressure chamber 21c can be made as large as that of the second pressure chamber 21d, and the flow passage area of the second pressure chamber 21d can be made as large as that of the third pressure chamber 21g. Therefore, the flow resistance of the first, second, and third pressure chambers 21c, 21d, and 21g can be reduced to further improve the blowing efficiency. Moreover, since the flow path of the lower first pressure chamber 21c can be rapidly widened, the flow velocity can be further reduced.

  Further, a displacement portion 21e provided at the lower portion of the refrigerator compartment 2 is disposed so as to be biased in one of the left and right directions, and a low temperature isolation chamber 19 is disposed in front of the displacement portion 21e. Thereby, the cold heat of the cold air | gas which distribute | circulates the main duct 21 is discharge | released to the isolation | separation chamber 19, and the isolation | separation chamber 19 can be easily maintained at low temperature.

  In addition, the first pressure chamber 21c is disposed in the displacement portion 21e, and the second and third pressure chambers 21d and 21g are disposed in substantially the center in the left-right direction. Thereby, the main duct 21 meanders in the left-right direction. However, since the dynamic pressure is converted into static pressure in each of the first, second, and third pressure chambers 21c, 21d, and 21g connected by the communication passage 21f, the increase in pressure loss due to meandering is reduced, and the blowing efficiency is reduced. Can be improved. Further, the cool air can be evenly guided from the third pressure chamber 21g at the substantially center to the discharge ports 31L and 31R respectively provided on the left and right of the refrigerator compartment 2.

  In addition, since the member 55 made of a good thermal conductor is disposed on the front surface of the second pressure chamber 21d, the cold air discharged from the discharge ports 32L, 33L, 32R, and 33R is transmitted to the member 55. Therefore, cold heat is released from a wide range by the member 55, and the refrigerator compartment 2 can be more uniformly cooled to improve the cooling efficiency of the refrigerator 1. Further, the same effect can be obtained even if a good thermal conductor similar to the member 55 is provided in front of the first pressure chamber 21c.

  Note that the first pressure chamber 21c may be omitted when the flow rate of the cool air can be sufficiently reduced by the second and third pressure chambers 21d and 21g. In other words, the right side wall of the main duct 21 may be formed by extending the left rib 40b of the sub duct 23R to the lower end. Thereby, the part of the 1st pressure chamber 21c becomes a mere passage with a narrow width, and the heat insulation part of duct panel 40 can be reduced more.

  In the first to third embodiments, the main duct 21 is formed along the back surface of the refrigerator compartment 2, but may be formed along the side surface of the refrigerator compartment 2.

  ADVANTAGE OF THE INVENTION According to this invention, it can utilize for the refrigerator which discharges cold air to the store room from the discharge outlet formed in the duct.

The front view which shows the refrigerator of 1st Embodiment of this invention. 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. The front view which shows the duct panel of the refrigerator of 1st Embodiment of this invention. DD sectional view of FIG. The front view which shows the duct panel of the refrigerator of 2nd Embodiment of this invention. AA sectional view of FIG. The front view which shows the duct panel of the refrigerator of 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigerating room 3 Freezing room 4 Vegetable room 5 Machine room 6 Compressor 10, 20 Cold air passage 11 Cooler 13 Cold air distribution device 15-18 Storage case 19 Isolation chamber 19a Discharge port 21 Main duct 21a Upper end 21b Inclined surface 21c 21d First pressure chamber 21d Second pressure chamber 21e Displacement portion 21f, 21h Communication portion 21g Third pressure chamber 22L, 22R, 23L, 23R Sub-duct 31L, 31R Discharge port (first discharge port)
32L, 32R, 33L, 33R, 34L, 34R Discharge port (second discharge port)
39 Narrowing part 40 Duct panel 40a Front part 40b Rib 43 Illumination lamp 44 Subduct narrowing part 45, 46, 47 Guide part

Claims (7)

  A cooler that generates cool air, a first duct that extends vertically along the wall surface of the storage chamber and in which cool air generated by the cooler flows from below to above, and a first duct that is provided above the first duct. A pressure chamber that widens the flow path with respect to the lower part of the pressure chamber, and a first discharge port that is provided in a first duct downstream of the pressure chamber and discharges cool air to the upper part of the storage chamber, The refrigerator characterized by narrowing the 1st duct between the 1st discharge openings to the pressure room.   The refrigerator according to claim 1, wherein a plurality of the pressure chambers are arranged side by side.   The refrigerator according to claim 2, wherein the pressure chambers adjacent in the vertical direction communicate with each other through a communication portion that narrows the flow path.   The first duct has a displacement portion that is biased to one side in the left-right direction at the lower portion of the storage chamber, the lower pressure chamber is provided in the displacement portion, and the upper pressure chamber is disposed at substantially the center in the left-right direction. The refrigerator according to claim 2 or 3, wherein a first discharge port is provided on each of the left and right sides of the storage chamber.   The refrigerator according to claim 4, wherein an isolation chamber is provided in front of the displacement portion, and the inside of the isolation chamber is maintained at a lower temperature than the outside.   2. A second duct that branches from the pressure chamber through a constricted portion that narrows a flow path below the first discharge port, and a second discharge port that is disposed in the second duct. The refrigerator in any one of Claims 1-5.   The refrigerator according to any one of claims 1 to 6, further comprising a member made of a good thermal conductor disposed on a front surface of the pressure chamber.

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