JPH04292767A - Refrigerator - Google Patents

Abstract

PURPOSE:To provide a duct and a refrigerator having such a structure in which air cooled by a cooling device is guided into a storing chamber through a damper device and a cold air supplying duct, wherein cold air is efficiently guided to an entire storing chamber and the cold air is hardly accumulated around the damper device even if the air in the storing chamber is flowed in a reverse direction when a blower is stopped to operate. CONSTITUTION:A cold air supplying duct 60 is comprised of the first passage 64 for guiding cold air from a damper device 71 downwardly and the second passage 65 communicated with the first passage at a communication port 70 and for guiding cold air to the refrigerator chamber 10 and a vegetable chamber 11. The first blowing port 69 is disposed above the communication port and the second blowing port 77 is disposed below the communication port.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a cold air supply duct that guides air cooled by a cooler placed in a cooler room to a storage room, and a damper device that is placed inside this duct and controls the cold air circulation. Regarding a refrigerator equipped with.

0002

2. Description of the Related Art A damper device for guiding air cooled by a cooler into a storage chamber through a duct and controlling the circulation of cold air in the duct is used, for example. There is a publication No. 294883. In addition, as an example of a device that guides the cold air that has passed through this damper device into the storage room from two air outlets,
There is Japanese Unexamined Patent Publication No. 64-49873.

[0003] In the above-mentioned publication (2), first and second baffles are provided in the first and second ducts that guide the cold air to the first and second storage chambers, respectively, to control the flow rate of the cold air. It is disclosed that each baffle is provided and each baffle is driven by a motor.

On the other hand, the above-mentioned publication (2) discloses a configuration in which a pair of cold air supply ports are formed on both sides of a storage case that houses a damper device, and cold air is supplied into the storage chamber from both supply ports. has been done.

[0005]

[Problem to be Solved by the Invention] According to the above-mentioned publication (■), when the blower is stopped, the forced convection in the storage room stops and shifts to natural convection, which causes the flow to flow from the air outlet side. Air within the storage chamber will flow back into the ducts and will accumulate around portions of the damper device within each duct. Then, when the blower is operated, this accumulated air is rapidly cooled and tends to cause frost formation around the damper device, and in severe cases, the baffle becomes difficult to operate, which can adversely affect the motor.

On the other hand, in the above-mentioned publication (2), as in the above-mentioned case (2), when the blower is stopped, the air inside the storage room flows back into the storage case, and frost may form on the damper device.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a refrigerator having a structure that prevents the air in the storage chamber from flowing backward and staying around the damper device even when the blower is stopped.

[0008]

[Means for Solving the Problems] The present invention includes a cold air supply duct that guides air cooled by a cooler to a storage chamber, and a damper device that controls the flow of cold air in the duct based on the temperature of the storage chamber. In the refrigerator equipped with
A first passageway that guides cold air downward from the damper device, and a second passageway that communicates with the first passageway through a communication port and guides the cold air that has passed through the first passageway to a storage chamber, The passage is provided with a first outlet above the communication port and a second outlet below the communication port.

[0009]

[Operation] First and second passages are arranged in parallel in the cold air supply duct, and in the second passage, the first outlet is placed above the communication port that communicates both passages, and the second outlet is placed above the communication port that communicates the two passages. Because they are formed at the bottom, the cold air that has passed through the first passage is guided from the communication port to the second passage, and a part of it makes a U-turn toward the first air outlet above and enters the storage room. The remaining cold air is further led to the storage chamber from a second outlet located below.

On the other hand, when the blower is stopped, most of the air flowing back from the second outlet into the second passage rises in the second passage and heads toward the first outlet. This makes it difficult for the liquid to flow back from the communication port to the first passage.

[0011]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings.

1 is a refrigerator. Reference numeral 2 denotes a heat insulating box body which is constructed by filling a foamed heat insulating material 5 such as foamed polyurethane between an outer box 3 made of metal and an inner box 4 made of synthetic resin, forming a storage compartment opened to the front.

The inside of the heat insulating box 2 is vertically divided by a partition wall 6, and the upper part of the partition wall 6 is a freezing chamber 7 which is cooled to freezing temperature. The space below the partition wall 6 is divided into two upper and lower chambers by a partition plate 8. The upper part is a refrigerator compartment 10 that is maintained at a refrigeration temperature, and the lower part is a vegetable compartment 11. are arranged so that they can be pulled out freely. 13, 14 and 15 are each room 7, 10 and 1
1 is a heat insulating door that can be opened and closed.

Reference numeral 20 denotes a plate-fin type cooler installed vertically in the cooler chamber 21 behind the back plate 7A of the freezer compartment 7, and a blower 22 is installed above the cooler 20.
The cold air that has exchanged heat with the cooler 20 is sucked up and blown into the freezer compartment 7 from the front air outlet 7B, causing the inside of the freezer compartment 7 to -20
Cool to freezing temperature around ℃.

Reference numeral 23 denotes a plurality of grooves formed on both side walls of the inner box 4 in the freezer compartment 7 and the refrigerator compartment 10, and these grooves serve as guide rails for supporting the holding plates 25 of the shelves 24, which will be described later. Function. Reference numeral 25 denotes a holding plate that is inserted into each of the grooves 23 so as to be able to be pulled out. However, refrigerator compartment 1
A shelf 24A, which is slightly smaller than the other shelves 24, is held in the uppermost groove 23A at 0 so that it can be pulled out, and the door 17 is opened and closed as the shelf 24A is put in and taken out. The room above shelf 24A is an ice greenhouse 12
It is said that

As shown in FIGS. 2 and 4 to 7, this holding plate 25 is integrally formed with a rib 26 projecting upward on the outer peripheral edge and projecting portions 27 and 29 on both sides and the back. In addition, a spindle support part 43 consisting of an annular recess 44 and a cylindrical collar 45 is arranged at the center of the upper surface at six places on the circumference at equal intervals, and is inserted into the recess 46 of the holding plate 25. A sliding member 48 having a sliding surface 47 and sliding the shelf 24 in the circumferential direction is provided. The sliding member 48
As shown in FIG.
By fitting the retaining plate 25 into the slit 50 of
is installed on.

Reference numeral 24 denotes a disc-shaped shelf rotatably installed on the holding plate 25. And the shelf 24 has a holding plate 25
The shelf 24 is rotatably set on the
As shown in FIG. 8, a cylindrical support shaft 5 is provided at the center of the bottom
1, an annular rib 52 is formed on the circumference, and a rib 53 is formed on the outer peripheral edge to be held substantially flush with the upper surface of the rib 26 of the holding plate 24. However, the front surface of the rib 53 corresponding to the front surface portion of the support plate 25 is also formed to be substantially flush with the front surface.

This shelf 24 is constructed by inserting the spindle 51 into the cylindrical collar 45 of the spindle support 43 and placing the annular rib 52 on the sliding surface 47 on the sliding member 48. is set on the holding plate 25 by inserting the protruding parts 27 and 29 of the holding plate 25 with the shelf 24 set into the groove 23 and the groove 42 formed on the back of the inner box 4. It is set in box 4.

Here, when no articles are placed on the shelf 24, the shelf 24 is supported only on the sliding surface 47 via the annular rib 52, and there is no space between the spindle 51 and the spindle support 43 in the axial direction. The setting is such that a gap 55 is formed.

With such a configuration, each shelf 24 can be rotatably supported on a horizontal plane, and articles placed on the shelves 24, including those at the back, can be moved to the front by rotating the shelves 24. This makes it easier to take items in and out.

[0021] Furthermore, if the shelf 24 is not needed, such as when the interior of the refrigerator compartment 10 is used vertically or when cleaning the interior of the freezer compartment 7 or the refrigerator compartment 10, the retainer plate 25 can be removed. . That is, when setting the shelves 24 in the refrigerator,
By inserting the holding plate 25 with the shelf 24 attached into the groove 23 in the inner box 4, the shelf 24 and the holding plate 25 can be easily set in the refrigerator, and the shelf 24 and the holding plate 25 are not necessary. When cleaning the inside of the refrigerator, the holding plate 25 can be easily removed together with the shelf 24 by pulling the holding plate 25 forward.

[0022] Furthermore, the structure of the spindle support part 43 and the sliding member 48 makes it possible to obtain stable rotation of the shelf 24, so that even if the articles are placed on the shelf unevenly, the articles can be stored and taken out stably. Can be done.

Further, when no articles are placed on the shelf 24, the shelf 24 is supported on the sliding member 48 via the annular rib 52, and there is an axial gap between the spindle 51 and the spindle support 43. Since a gap 55 is formed, when no articles are placed on the shelf 24 or when only a small number of articles are placed on the shelf 24, the shelf 24 is supported only by the sliding surface 47, which prevents the shelf 24 from rotating. On the other hand, when there are a large number of articles to be placed, the spindle portion 51 and the spindle support portion 43 come into contact with each other in the axial direction to form a thrust bearing, making it possible to support the load of the articles even in the center of the shelf 24. I can do it,
Stable support of the shelf 24 can be obtained regardless of the number of articles.

The shelf 24 also has a sliding surface 47 of a sliding member 48 provided on the holding plate 25 and an annular rib 5 formed on the shelf.
2, the shelf 24 can be smoothly rotated in the circumferential direction while ensuring the strength of the shelf and the holding plate 25. Since there is no need to provide rollers, the number of parts can be reduced. To construct a rotating shelf device with good operability with a simple configuration without increasing the number of items or complicating assembly work, and to obtain stable rotating operation even when many articles are placed on a shelf 24. Can be done.

[0025] Since the sliding surfaces 47 are arranged at intervals in the circumferential direction, there is little sliding friction and smooth operation is achieved. Moreover, if the sliding surface 47 is curved, the sliding friction can be further reduced, and further effects can be expected.

On the other hand, a cold air supply duct 60 is formed in the back left corner of the refrigerator compartment 10, where the shelf 24 is separated from the inner box 4, so that the outer surface of the duct 60 has a shape that substantially follows the rotation trajectory of the shelf 24. It is arranged as follows. The upper end of this cold air supply duct 60 communicates with the cold air blowing side of the cooler chamber 21.

The cold air supply duct 60 extends over the entire vertical direction of the refrigerator compartment, and has a front cover 6 made of synthetic resin.
1, a front insulation material 62 placed behind this, and a rear insulation material 63 placed behind it. They constitute passages that communicate with the chambers 11 and allow cool air to circulate.

The cold air supply duct 60 also includes a first passage 64 that guides cold air downward from a damper device 71, which will be described later, and a first passage 64 that is arranged in parallel with the first passage 64.
and a second passage 65 that guides the cold air that has passed through the refrigerator compartment 10 and the vegetable compartment 11. To explain this in detail based on FIG.
6 into left and right first and second passages 64 and 65, and a second partition wall 67 extending in the horizontal direction divides the first passage 6 into left and right passages 64 and 65.
It forms the lower end of 4.

Reference numeral 68 denotes an air outlet for the ice room that communicates with the ice room 12 formed in the upper part of the refrigerator compartment 10, and 69 represents a refrigerating room as a first air outlet that is formed corresponding to each shelf of the refrigerator room. This is an air outlet. A communication port 70 communicates the first passage 64 and the second passage 65, is formed by the first and second partition walls 66 and 67, and is located below the first air outlet 69. It is preferable.

Further, 71 is a damper device disposed in the first passage 64, which includes a refrigerating room temperature sensor (hereinafter referred to as R sensor) 72 for detecting the temperature of the refrigerating room 10 and a temperature sensor for detecting the temperature of the ice room. The operation is controlled based on the temperature detected by an icehouse temperature sensor (hereinafter referred to as H sensor, not shown), which is operated by a motor 73 attached to the board K, which controls the baffles 74 for the icehouse and the refrigerator room disposed above and below. The baffles 75 are rotated on a horizontal plane with a phase difference, respectively, to open and close the ice room vent 64A and the refrigerator compartment vent 64B. Furthermore, below the damper device 71 in the first passage 64, a deodorizing device 76 for deodorizing the passing air is provided.

Reference numeral 77 is a second air outlet formed at the lower part of the first passage 64, and the lower part of the duct 60 is connected to the vegetable compartment 11.
Since this second air outlet is connected to the vegetable compartment, this second air outlet serves as a vegetable compartment air outlet, and is located further below the communication port 70.

According to the above configuration, the cooler chamber 21
A first and second passage 64 and 65 are arranged in parallel in the cold air supply duct 60 that guides the cold air cooled by the cooler 20 to the refrigerator compartment 10 and the vegetable compartment 11, and a communication port is provided in the second passage 65. 70, the first air outlet 69 is formed above the air outlet 70, and the second air outlet 77 is formed below the air outlet 70, so that some of the cold air guided downward in the first passage is partially absorbed in the second passage. is guided to the first air outlet in a U-turn, and the remaining air is guided further downward to the second air outlet. Therefore, multiple shelves are arranged in the refrigerator compartment, and appropriate storage space is provided so as to correspond to each shelf. In this embodiment in which the air outlet is formed, a cold air passage directed toward each shelf can be formed, and the articles placed in the refrigerator compartment and on the shelves can be evenly cooled.

On the other hand, even if the air in the vegetable compartment 11 flows back into the second passage 65 from the second outlet 77 while the blower 22 is stopped, most of the air continues to flow through the second passage. Since the air rises and is guided to the first air outlet, backflow from the second passage to the first passage can be suppressed, and warm air is prevented from accumulating around the damper device. When the operation of the damper device 71 is resumed, frost formation around the damper device 71 can be made less likely to occur.

[0034]

As described in detail above, according to the present invention, the first and second passages are provided in the cold air supply duct, and the second
Since the first air outlet is formed above the communication port of the passage, and the second air outlet is formed below the communication port, the cold air guided downward through the first passage is It enters the second passage, and in this second passage, part of it makes a U-turn and is guided to the first air outlet above, and the rest is further guided to the second air outlet below, so that it enters the storage room. By arranging a plurality of shelves and appropriately setting the position of the air outlet to correspond to each shelf, it is possible to form a cold air passage toward each shelf. Items can be cooled evenly.

On the other hand, even if the air in the storage room flows back into the second passage from the second outlet when the blower is stopped, most of the air will continue to rise through the second passage and return to the second passage. Since it is guided to the first air outlet, the second passage leads to the first air outlet.
It is possible to suppress backflow of air into the first passage, and in particular, to prevent warm air from stagnation around the damper device, thereby making it difficult for frost to form on the damper device.

[Brief explanation of drawings]

FIG. 1 is a rear view of a front heat insulating material that constitutes a cold air supply duct.

FIG. 2 is an exploded perspective view of the refrigerator showing the mounting structure of shelves and holding plates.

FIG. 3 is a perspective view of the refrigerator with the door opened.

FIG. 4 is a longitudinal cross-sectional view of the refrigerator.

FIG. 5 is a vertical cross-sectional view of the holding plate and the shelf cut in the left-right direction.

FIG. 6 is a longitudinal cross-sectional view of the holding plate and the shelf cut in the front-rear direction.

7 is an enlarged sectional view of section A in FIG. 5. FIG.

FIG. 8 is an exploded perspective view of the holding plate in a partially cutaway state.

FIG. 9 is an exploded perspective view of the cold air supply duct.

FIG. 10 is an enlarged sectional view of the refrigerator taken at a cold air supply duct.

[Explanation of symbols]

1 Refrigerator 7 Freezer room 10 Refrigerator room 11 Vegetable room 20 Cooler 24 Shelf 60 Cold air supply duct 64 First passage 65 Second passage 69 First outlet 70 Communication port 71 Damper device 77 Second air outlet

Claims (1)

[Claims] 1. A refrigerator comprising: a cold air supply duct that guides air cooled by a cooler to a storage chamber; and a damper device that controls cold air distribution in the duct based on the temperature of the storage chamber. The damper device includes a first passage that guides cold air downward from the damper device, and a second passage that communicates with the first passage through a communication port and guides the cold air that has passed through the first passage to the storage chamber. A refrigerator characterized in that the second passage is provided with a first air outlet above the communication port and a second air outlet below the communication port.