JP2010032070A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of preventing deterioration of stored objects and improving cooling efficiency. <P>SOLUTION: This refrigerator includes a cooler 11 producing cold air, a first duct 21 vertically extending along a wall surface of a storage compartment 2 for circulating the cold air produced by the cooler 11, a pressure chamber 21d constituted by widening a flow channel area of at least a part of the first duct 21, discharge ports 32L-34L, 32R-34R for discharging the cold air guided from the pressure chamber 21d to the storage compartment 2, and a member 55 composed of a heat good conductor disposed on a front face of the pressure chamber 21d. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a refrigerator that discharges cold air from a plurality of discharge ports 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 cold air is large on the cold air inflow side at the lower part of the duct in order to allow the cold air to reach the upper discharge port. For this reason, there was a problem that cold air was vigorously discharged from the lower discharge port and sprayed on the stored item, and the deterioration of the stored item was promoted. In addition, since cold air flowing down by its own weight is discharged more in the lower part than in the upper part of the refrigerator compartment, the refrigerator compartment is not uniformly cooled, resulting in poor cooling efficiency.

  An object of this invention is to provide the refrigerator which can improve cooling efficiency while preventing deterioration of a stored matter.

  In order to achieve the above object, the present invention provides a cooler that generates cold air, a first duct that extends vertically along the wall surface of the storage chamber and through which the cold air generated by the cooler flows, and at least one of the first ducts A pressure chamber having a part of the flow channel widened, a discharge port for discharging cool air guided from the pressure chamber to the storage chamber, and a member made of a good thermal conductor disposed in front of the pressure chamber. It is characterized by.

  According to this configuration, the cold air generated by the cooler flows through the first duct, and the dynamic pressure is converted into static pressure in the pressure chamber having a wide flow path area, so that the flow velocity is reduced. The cool air guided from the pressure chamber to the discharge port is discharged into the storage chamber at a low speed. The cold air discharged from the discharge port comes into contact with the member to transfer the cold heat of the cold air, and the cold heat is released from a wide range of the entire member into the storage chamber.

  Moreover, the present invention is characterized in that, in the refrigerator configured as described above, the discharge port is provided in the vicinity of the member.

  Further, the present invention is characterized in that in the refrigerator configured as described above, a second duct that branches from the pressure chamber via a constricted portion in which a flow path is constricted is provided, and the discharge port is disposed in the second duct.

  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 discharge port to the storage chamber at a low speed. A plurality of second ducts may be provided, and a plurality of discharge ports may be provided in one second duct.

  Moreover, this invention is a refrigerator of the said structure, It is provided with the panel attached to the front surface of a 1st, 2nd duct, and the partition wall which consists of a heat insulating material extended up and down and partitioning a 1st, 2nd duct, The said member is While having the attachment part which bends right and left edge back and attaches to the said panel, the said attachment part has been arrange | positioned ahead of the said partition wall, It is characterized by the above-mentioned. According to this configuration, for example, the member is integrated with the panel by inserting the attachment portion into the groove provided in the panel. At this time, the mounting portion is disposed in front of the partition wall, and a decrease in the heat insulation thickness on the front side of the first and second ducts is avoided.

  According to the present invention, in the refrigerator having the above configuration, an upper discharge port disposed above the pressure chamber is provided, and a flow path is narrowed from the pressure chamber toward the upper discharge port. According to this configuration, the cold air flowing through the first duct is narrowed by narrowing the flow path between the pressure chamber and the upper discharge port. Thereby, the cool air whose static pressure is converted into dynamic pressure and the flow velocity is increased is discharged from the upper discharge port to the upper portion of the storage chamber.

  The present invention is characterized in that, in the refrigerator having the above-described configuration, the front surface of the first duct is detachable.

  According to the present invention, since the cool air guided from the pressure chamber whose channel of the first duct is widened is discharged from the discharge port to the storage chamber, and the member made of a good heat conductor is disposed on the front surface of the pressure chamber, The cool air with reduced is uniformly discharged from the discharge port, and the cold heat of the cool air is transmitted to the member. Thereby, deterioration of stored goods by cold air colliding with stored goods directly from a discharge outlet can be reduced. In addition, cold energy is released from a wide range by the member, and the cooling efficiency of the refrigerator can be improved by cooling the storage room uniformly.

  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 includes a chilled room, an ice greenhouse, and the like, and is maintained at a lower temperature than the inside of the refrigerator room 2 around the isolation room 19. 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 of the first pressure chamber 21 c is widened with respect to the lower end portion of the main duct 21. The flow path of the second pressure chamber 21d is wider 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.

  Discharge ports 31L and 31R (upper discharge ports) are provided in the upper part of the main duct 21. The sub ducts 22L and 22R are provided with discharge ports 32L and 32R, respectively. The sub duct 23L is provided with discharge ports 33L and 34L, and the sub duct 23R is provided with discharge ports 33R and 34R. 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. The vegetable compartment 4 is provided with a storage case 18 whose upper surface is closed by a case cover 18 a, and a return port 4 b that opens in front of the cold 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 styrene 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.

  The left and right ends of the member 55 are provided with a plurality of attachment feet 55a (attachment portions) bent rearward. 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 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 is gradually widened above the discharge port 19a to form a first pressure chamber 21c having a large flow area. 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, in the second pressure chamber 21d, the flow path area further increases, and the flow rate of the cold air flowing through the second pressure chamber 21d further decreases.

  As a result, the second pressure chamber 21d is filled with a large amount of cool air, and the cool air gently flows upward at a low speed of about 1 m / s, for example. As a result, if the heat insulation layer between the second pressure chamber 21d and the front panel 50 or the member 55 is thin, the front panel 50 or the member 55 is likely to dew. Further, as will be described later, the amount of cool air flowing through the sub ducts 22L, 22R, 23L, and 23R is small.

  For this reason, the mounting foot 55a is disposed in front of the sub ducts 22L, 22R, 23L, and 23R outside the second pressure chamber 21d. Thereby, the heat insulation layer ahead of the 2nd pressure chamber 21d can be ensured thick (for example, 10 mm or more), and local dew condensation in the attachment leg 55a and the recessed part 40c can be prevented. At this time, since the flow path area of the narrowed portion 39 is small, the amount of cool air flowing through the subducts 22L, 22R, 23L, and 23R through the narrowed portion 39 is small. For this reason, even if the heat insulation layer between subduct 22L, 22R, 23L, 23R and the recessed part 40c becomes thin, there is little influence with respect to dew generation.

  The cool air rising in the second pressure chamber 21d is discharged into the refrigerator compartment 2 from the discharge ports 31L and 31R of the upper end portion 21a. The flow path of the upper end portion 21a has a flow path area narrower than that of the second pressure chamber 21d, and is narrowed toward the discharge ports 31L and 31R. 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.

  Accordingly, in the first and second pressure chambers 21c and 21d in the intermediate portion below the upper end portion 21a of the main duct 21, the flow velocity is low, the flow resistance is lowered, and the flow efficiency is improved. 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.

  Further, since the discharge ports 31L and 31R are arranged at the left and right ends of the upper end portion 21a extending in the left and right directions, the cool air is discharged from a wide range in the left and right direction of the refrigerating room 2 to reach the whole refrigerating room 2 be able to. In addition, you may provide another discharge port in the middle of the path | route which reaches the discharge ports 31L and 31R of the upper end part 21a. Thereby, the cold air discharge into the chamber can be made more uniform.

  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. The sub ducts 22L, 22R, 23L, and 23R branch from the second pressure chamber 21d via the narrowed portion 39. For this reason, the amount of cold air discharged from the discharge ports 32L to 34L and 32R to 34R is a small amount of about 1/20 of the cold air flowing through the second pressure chamber 21d. This reduces the cool air that is blown directly onto the store.

  Since the volume of the cold air that has flowed into the sub ducts 22L, 22R, 23L, and 23R from the narrowed portion 39 suddenly expands, the dynamic pressure is further converted into a 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 heat | fever of the cold air which distribute | circulates the cold air | gas channel | path 20 is transmitted to the member 55, is discharge | released to the refrigerator compartment 2, and the refrigerator compartment 2 is indirectly cooled. Since the cool air discharged from the discharge ports 32L to 34L and 32R to 34R is reduced, the refrigerator compartment 2 can be sufficiently cooled by indirect cooling.

  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 this embodiment, the cold air led from the first and second pressure chambers 21c and 21d widened the flow path of the main duct 21 (first duct) is discharged from the discharge ports 32L to 34L and 32R to 34R into the refrigerator compartment 2. A member 55 made of a good heat conductor is disposed on the front surface of the second pressure chamber 21d. As a result, the cold air whose flow velocity has been reduced by the first and second pressure chambers 21 c and 21 d is uniformly discharged at low speed from the discharge ports 32 L to 34 L and 32 R to 34 R, and a part of the cold heat of the cold air is transmitted to the member 55.

  Accordingly, it is possible to reduce the deterioration of the stored item due to the cold air vigorously colliding directly with the stored item from the discharge ports 32L to 34L and 32R to 34R. Moreover, cold heat is emitted from a wide range by the member 55, and the refrigerator compartment 2 can be 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, since the discharge ports 32L to 34L and 32R to 34R are provided in the sub ducts 32L, 32R, 33L, and 33R (second duct) branched from the main duct 21 via the narrowed portion 39, the discharge ports 32L to 34L and 32R to The flow rate of the cold air discharged from 34R can be made more uniform and low. Therefore, deterioration of the stored product can be further reduced.

  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.

  Also, discharge ports 31L and 31R (upper discharge ports) disposed above the second pressure chamber 21d are provided, and the flow path is narrowed from the second pressure chamber 21d toward the discharge ports 31L and 31R. For this reason, the flow velocity of the cool air led to the discharge ports 31R and 31L increases, and a lot of cool air is discharged near 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. Moreover, 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 further improved.

  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. FIG. 6 shows a front view of the duct panel 40 of the present embodiment. 7 is a cross-sectional view taken along the line AA in FIG. 6, and FIG. 8 is a view showing the left half of the cross section taken along the line CC in 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 that covers the front surface, and the front panel 50 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, 31R to 33R, and 19a are formed by the opening portions 40h and 50h provided in the front surface portion 40a and the front panel 50. 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. In the duct panel 40, a part of the first pressure chamber 21c of the main duct 21 and the second pressure chamber 21d are formed.

  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 attachment foot 55a (refer FIG. 8) is distribute | arranged ahead 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 extends vertically, and the cold air inflow side of the main duct 21 is provided to be biased to the right where the isolation chamber 19 (see FIG. 3) is disposed. 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 lower portion of the main duct 21 that is unevenly arranged. 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. By the inclined surface 21b, the flow path of the upper end portion 21a between the second pressure chamber 21d and the discharge ports 31L and 31R can be easily narrowed and narrowed. 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.

  The duct panel 40 is divided vertically by a two-dot chain line E, and only the upper part is detachable. Thereby, the upper part can be easily detached while the lower part arranged behind the isolation chamber 19 is attached. Therefore, the main duct 21 and the sub ducts 22L, 22R, 23L, and 23R can be easily cleaned.

  A space 49 surrounded by ribs 40b is provided below the sub ducts 23L and 23R, and an opening 48 is opened in the front surface 40a (see FIG. 8) of the space 49. The narrow portion 39 can be formed by removing a part of the rib 40 b of the space portion 49. Thereby, the space part 49 becomes a subduct, and the opening part 48 can be used as a discharge port. Therefore, it is possible to make the duct panel 40 common to a plurality of types of refrigerators 1 having different volumes and cold air flow rates.

  According to the present embodiment, similarly to the first embodiment, the cold air guided from the first and second pressure chambers 21c, 21d, which has widened the flow path of the main duct 21 (first duct), is discharged from the discharge ports 32L, 32R, 33L. 33R is discharged into the refrigerator compartment 2, and a member 55 made of a good thermal conductor is disposed on the front surface of the second pressure chamber 21d. As a result, the cold air whose flow velocity is reduced by the first and second pressure chambers 21 c and 21 d is uniformly discharged from the discharge ports 32 L, 32 R, 33 L, and 33 R, and a part of the cold heat of the cold air is transmitted to the member 55.

  Accordingly, it is possible to reduce deterioration of the stored item due to the cold air vigorously colliding directly with the stored item from the discharge ports 32L, 32R, 33L, and 33R. Moreover, cold heat is emitted from a wide range by the member 55, and the refrigerator compartment 2 can be uniformly cooled to improve the cooling efficiency of the refrigerator 1.

  Also, discharge ports 31L and 31R (upper discharge ports) disposed above the second pressure chamber 21d are provided, and the flow path is narrowed from the second pressure chamber 21d toward the discharge ports 31L and 31R. For this reason, the flow velocity of the cool air led to the discharge ports 31R and 31L increases, and a lot of cool air is discharged near 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.

  Moreover, cooling of the center part of the up-down direction of the refrigerator compartment 2 is supplemented with a small amount of low-speed cold air current discharged from the discharge ports 32L, 32R, 33L, 33R. Furthermore, indirect cooling via the member 55 is also performed by a part of the cold heat of the cold air passing through the second pressure chamber 21d. Therefore, the inside of the refrigerator compartment 2 can be cooled more uniformly and the cooling efficiency of the refrigerator 1 can be further improved.

  In addition, the main duct 21 is arranged on the upstream side (downward) of the second pressure chamber 21d so as to be biased toward one of the left and right directions in which the low temperature isolation chamber 19 is disposed. 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.

  Further, since the upper surface of the main duct 21 has the inclined surface 21b extending upward from below toward the discharge ports 31L and 31R, the flow path of the upper end portion 21a can be easily narrowed and narrowed. Further, since the cool air flowing through the main duct 21 is along the inclined surface 21b, it is guided to the discharge ports 31L and 31R more smoothly than in the first embodiment. Therefore, ventilation efficiency can be improved. In addition, the heat insulating material forming the duct panel 40 can be reduced, and resource saving and mass productivity can be improved.

  In addition, since the sub-duct narrowed portion 44 having a narrowed flow path is provided in the sub-ducts 22L and 22R between the narrowed portion 39 and the discharge ports 32L and 32R, two pressure chambers are formed in each of the sub-ducts 22L and 22R. Thereby, the flow velocity of the cold air discharged from the discharge ports 32L and 32R can be made uniform at a lower speed.

  It is more preferable that the flow path area of the narrowed portion 39 is narrower than the opening areas of the discharge ports 32L, 32R, 33L, 33R. Further, the flow passage area of the sub-duct narrowed portion 44 may be narrower than the opening areas of the discharge ports 32L and 32R.

  Further, since the cold air inflow side of the main duct 21 is arranged to be biased to the right, the opening area of the left discharge ports 31L, 32L, 33L may be larger than the opening area of the right discharge ports 31R, 32R, 33R. Good. 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.

  As in the first embodiment, when the amount of cool air flowing through the second pressure chamber 21d is small, the front part 40a and the part of the front panel 50 of the duct panel 40 may be formed thin, or the front part 40a. In addition, a part of the front panel 50 may be omitted.

  Further, a part of the front part 40a and the front panel 50 of the duct panel 40 in front of the first pressure chamber 21c may be formed thin, or a part of the front part 40a and the front panel 50 may be omitted. Thereby, the cooling by the indirect cooling increases in the refrigerator compartment 2, can reduce the discharge amount of cold air, and can further reduce deterioration of the stored matter by cold air.

  In the first and second 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. CC sectional view of FIG.

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 First pressure chamber 21d Second pressure chamber 22L, 22R, 23L, 23R Sub duct 31L, 31R 32L, 32R, 33L, 33R, 34L, 34R Discharge port 39 Narrowed portion 40 Duct panel 40a Front portion 40b Rib (partition wall)
43 Illuminating light 44 Subduct constriction 45 Guide part 50 Front panel 55 Member 55a Mounting foot

Claims (6)

  A cooler that generates cold air, a first duct that extends vertically along the wall surface of the storage chamber and through which the cool air generated by the cooler flows, and a pressure chamber that widens at least a part of the flow path of the first duct; A refrigerator comprising: a discharge port for discharging cool air guided from the pressure chamber to the storage chamber; and a member made of a good thermal conductor disposed on the front surface of the pressure chamber.   The refrigerator according to claim 1, wherein the discharge port is provided in the vicinity of the member.   The refrigerator according to claim 1 or 2, wherein a second duct is provided that branches from the pressure chamber via a constricted portion in which a flow path is narrowed, and the discharge port is disposed in the second duct.   A panel attached to the front surface of the first and second ducts, and a partition wall made of a heat insulating material extending up and down to partition the first and second ducts, and the members bend the left and right edges backward. The refrigerator according to claim 3, wherein the refrigerator has an attachment portion attached to the panel, and the attachment portion is disposed in front of the partition wall.   The refrigerator according to any one of claims 1 to 4, wherein an upper discharge port disposed above the pressure chamber is provided, and a flow path is throttled from the pressure chamber toward the upper discharge port. .   The refrigerator according to any one of claims 1 to 5, wherein the front surface of the first duct is detachable.

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