JPH0682144A - Refrigerator - Google Patents

Abstract

PURPOSE:To cause cold air to be uniformly blown out of each of blowing-out ports of a duct. CONSTITUTION:Cold air sent from a cooler by a fan flows into a first duct 33a extending upwardly from a supplying port 34 opened or closed by a damper device 35. This cold air strikes against the first duct 33a at its upper end and then flows into a second duct 33b extending downwardly. As the cold air strikes against the first duct 33a at its upper end, the speed of cold air is converted into pressure. The cold air entering the second duct 33b is blown out through a plurality of blowing-out ports 33c due to its pressure, so that a blowing amount from each of the blowing-out ports 33c becomes equal to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator having a structure in which cold air is blown into a storage chamber from a plurality of blowout ports formed in a duct.

[0002]

2. Description of the Related Art In a fan-cool type refrigerator, cold air cooled by a cooler is supplied to a storage room such as a freezing room or a refrigerating room by a fan. Of these, for the refrigerator room,
It is performed through the duct 1 as shown in FIGS. 9 and 10. This duct 1 is composed of a lower duct 4 having a supply port 3 which is opened and closed by a damper device 2 and an upper duct 5 which communicates with the supply port 3, and the supply port 3 is provided on a rear wall 6 of a refrigerating compartment. It communicates with the cold air passage 7.

The cool air sent from the cooler by a fan (not shown) flows into the upper duct 6 from the supply port 3 and flows upward in the upper duct 6, so that there is an interval in the vertical direction. The plurality of outlets 8 provided in this order are blown into the refrigerating chamber from the lower outlet 8 in order. As the damper device 2, a motor type damper device using a motor as a drive source is used, and when the temperature of the refrigerating room drops to a set temperature, the supply port 3
Is closed to stop the supply of cold air to the refrigerator compartment.

In the example shown in FIGS. 9 and 10, the lower duct 4 is provided with another supply port 10 which is opened and closed by another motor-type damper device 9.
0 is connected to a front duct 11 formed in the lower duct 4 in order to supply cold air to a chilled chamber which is a storage chamber different from the refrigerating chamber.

[0005]

In the above structure, the cold air discharged from the supply port 3 is blown into the refrigerating chamber from the lower outlet port 8 in the process of flowing upward in the upper duct 5, so that each blown air is blown out. The amount of cold air blown out from the outlet 8 depends on the supply port 3
There is a tendency that the lower ones closer to, the greater the number. Therefore, the temperature inside the refrigerating chamber is lower on the lower side than on the upper side, and there is a problem that the cooling temperature varies.

On the other hand, in the motor type damper devices 2 and 9,
Since the opening / closing plates 2a, 9a are configured to be opened / closed by the motor, the opening / closing plates 2a, 9a can be controlled to be fully opened and fully closed. The plates 2a and 9a can be fully closed to prevent cold air from leaking. On the other hand,
Motor type damper devices are expensive.

Therefore, as shown in FIGS. 11 and 12,
Cold air discharged from one supply port 3 is configured to be distributed to the upper duct 5 and the front duct 11, and a single damper device is provided, and the damper device 12 is an inexpensive gas pressure damper device. It may be possible to reduce the cost by replacing with.

However, the gas pressure damper device 12
Is equipped with a temperature-sensing part filled with gas and an actuating part. The temperature-sensing part is placed in the refrigerating compartment, and the actuating part is displaced by the gas pressure change of the temperature-sensing part according to the temperature change in the refrigerating compartment to open and close 12
Since it is a configuration that adjusts the opening degree of a, when it is close to the set temperature, it is not in the fully closed state even if it is closed,
It may stay slightly open. In this state, the amount of cold air discharged from the supply port 3 is small,
Most of the cool air flows into the front duct 11 and the chilled chamber is in a supercooled state, or the flow speed of the cool air that has flowed into the upper duct 5 is relatively slow, so that it flows into the upper duct 5. Most of the cool air is blown into the refrigerating compartment from the lowermost air outlet 8, which causes a problem that the lower portion of the refrigerating compartment becomes supercooled.

The present invention has been made in view of the above circumstances, and an object thereof is to blow cold air into a storage chamber from a plurality of air outlets provided in a duct. In addition, even when the cool air discharged from one supply port is supplied to a plurality of storage chambers, the storage chambers are partially supercooled or one storage chamber is supercooled. There is no need to provide a refrigerator.

[0010]

In the refrigerator of the present invention, the cool air sent from the cooler by the fan flows into the duct from the supply port opened and closed by the damper device, and a plurality of ducts are formed in the duct. In the configuration in which the air is blown from the air outlet to the storage chamber, the duct includes a first duct portion extending in one direction from the supply port, and a first duct portion extending from an end portion of the first duct portion. Second extending in opposite direction
And a plurality of the air outlets are formed in the second duct portion at intervals in the extension direction of the second duct portion.

In this case, the third duct part for supplying the cool air to the other storage chamber may be connected to the second duct part, or the third duct part may be the first duct. You may provide so that it may extend in the opposite direction to the 1st duct part from the terminal part of a part.

[0012]

According to the invention of the above-mentioned means, the cold air discharged from the supply port hits the end of the first duct portion, and the velocity energy is converted into the pressure energy there. Then, this pressure causes the cool air to be blown out substantially uniformly from each of the outlets of the second duct portion.

Further, the third duct portion for supplying the cool air to the other storage chamber communicates with the second duct portion, or
Since it communicates with the end portion of the first duct portion, a large amount of cool air discharged from the supply port does not flow into the third duct portion.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to the case of supplying cold air to a refrigerating room and a chilled room will be described below with reference to FIGS.

In FIG. 5, which shows the overall structure of the fan-cool type refrigerator, 21 is a refrigerator main body.
3 and the vegetable compartment 24 are formed. Also, refrigeration room 2
A chilled chamber 25 is provided as a separate storage chamber in the lower part of the inside of the unit 2.

A cooler chamber 27 accommodating a cooler 26 is provided in a portion of the back wall of the refrigerator main body 21 corresponding to the back portion of the freezing chamber 23, and the air cooled by the cooler 26 is a fan. By means of 28, it is directly supplied to the freezing compartment 23 or is supplied to the refrigerating compartment 22, the chilled compartment 25 and the vegetable compartment 24 via the cold air passage provided in the refrigerator main body 21. And the freezing room 23, the refrigerating room 22, the chilled room 2
5 and the cold air supplied to the vegetable compartment 24 are the refrigerator main body 2
It is returned to the cooler chamber 27 through the reflux passage 30 provided in No. 1 and is cooled by the cooler 26 again to be supplied to each chamber. It should be noted that the cold air passage for sending the cool air to the refrigerating chamber 22 is shown in FIG. 3 and FIG.

In FIGS. 1 to 4 showing a structure for supplying the cool air sent through the cool air passage 29 into the refrigerating chamber 22 and the chilled chamber 25, 31 is a duct provided on the rear surface of the refrigerating chamber 22. The duct 31 is composed of a lower duct 32 and an upper duct 33. Lower duct 3
As shown in FIG. 3 and FIG. 4, a supply port 34 communicating with the cold air passage 29 is formed at 2, and a damper device 35 for opening and closing the supply port 34 is provided at 2. In addition, a laterally long duct portion 32a communicating with the supply port 34 is formed in the front portion of the lower duct 32, and an outlet port 32b for blowing cool air into the chilled chamber 25 is formed in the duct portion 32a. Has been done.

The damper device 35 is of a gas pressure type,
As shown in FIG. 4, a temperature sensing portion 35a containing a gas and a bellows 35b as an operating portion communicating with the temperature sensing portion 35a.
And an opening / closing plate 35c as an opening / closing unit. The temperature sensing portion 34a is arranged in the refrigerating compartment 22 as a storage compartment, the gas pressure inside thereof changes according to the temperature inside the refrigerating compartment 22, and the bellows 35b expands and contracts according to the gas pressure of the temperature sensing portion 34a. To do. The opening / closing plate 35c is the bellows 3
According to the expansion and contraction of 5b, it is rotationally displaced in the direction of arrow A, and the supply port 3
Open and close 4.

In the upper duct 33, as shown in FIGS. 1 and 2, a pair of partition ribs 36, 36 extending from the lower end to the upper end are formed. Due to the pair of partition ribs 36, 36, the inside of the upper duct 33 is located at the central portion, communicates with the supply port 34, and extends upward from the supply port 34 in one direction. Is the first
The upper end portion which is the terminal end of the duct portion 33a of the
The duct portion 33a is divided into second duct portions 33b and 33b extending downward in the opposite direction. A plurality of cool air outlets 33c are formed in the second duct portions 33b, 33b at intervals in the vertical direction, which is an extension direction of the second duct portions 33b, 33b.

In the above structure, the opening / closing plate 35c of the damper device 35 opens the supply port 34 when the refrigerating chamber 22 reaches a set temperature or higher. Then, the cool air sent from the cooler 26 by the fan 28 flows into the duct 31 from the supply port 34 and is divided into the duct portion 32 a of the lower duct 32 and the first duct portion 33 a of the upper duct 33. The cold air that has flowed into the duct portion 32a of the lower duct 32 blows out into the chilled chamber 25 from the air outlet 32b.

On the other hand, the first duct portion 33 of the upper duct 33
The cool air that has flowed into the inside a flows upward in the first duct portion 33a, hits the upper end portion of the first duct portion 33a, and changes the direction of the flow to change the flow direction of the second duct portion 33a.
It flows into b and flows downward in the second duct portion 33b. Now, as described above, the first duct portion 33a
The cold air flowing upward in the first duct portion 33
When hitting the upper end of a, the energy of the velocity of the cold air is converted into energy of the pressure, and the cold air flowing into the second duct portion 33b is pressurized by the pressure from the outlet 33c to the refrigerating chamber 22.
It will start to blow inside.

Therefore, the amount of cold air blown out from each of the air outlets 33c provided at intervals in the vertical direction is the same (to be precise, an amount corresponding to the size of the air outlets, and the size of each air outlet 33c is large). If the values are the same, the amount is the same, and it is possible to prevent variations in the temperature of the refrigerator compartment 22. In this case, since the cool air flows downward in the second duct portion 33b, it cannot be denied that the cool air is blown out as much as the upper air outlet 33c, but this is achieved by decreasing the diameter of the upper air outlet 33c. It can be resolved. The lowermost outlet of the outlets 33c is set small as shown in FIGS. 1 and 2. This is because the cold air blown out from the outlet of the upper part flows toward the return path 30 provided on the bottom surface of the refrigerating compartment 22, so that the amount of cold air blown to the lower part of the refrigerating compartment 22 does not have to be so large. This is to reduce the amount of cold air blown out from the blowout port at the lowermost portion than the others.

When the temperature of the refrigerating compartment 22 decreases to near the set temperature, the opening / closing plate 35c stops with the supply port 34 slightly open, and the amount of cold air discharged from the supply port 34 is reduced. However, even in this case, the amount of cool air blown out from the second duct portion 33b becomes equal for the same reason as described above, and there is no possibility that the inside of the refrigerating chamber 22 is locally overcooled.

In the above embodiment, the damper device 35 is of the gas pressure type, but it may be of the motor type. Alternatively, a separate supply port for supplying cold air to the chilled chamber 25 may be provided, and this supply port may be opened and closed by another damper device.

6 and 7 show a second embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and only different parts will be described.

The lower duct 32 is not provided with the duct portion 32a of the first embodiment, but is provided with third duct portions 32c located on both sides of the supply port 34 instead of the duct portion 32a. An outlet 32d for blowing the cool air into the chilled chamber 25 is formed in the front part of the duct part 32c of No. 3. The third duct portion 32c is communicated with the lower end portion of the second duct portion 33b of the upper duct 33.

With this structure, a part of the cold air flowing into the second duct portion 33b is supplied to the chilled chamber 25. Then, the opening / closing plate 35c is connected to the supply port 34
If it is stopped in a slightly opened state, the supply port 3
Although a small amount of cold air is continuously discharged from No. 4, most of the cold air is not supplied only to the chilled chamber 25, and there is no risk of the chilled chamber 25 being overcooled.

FIG. 8 shows a third embodiment of the present invention.
The same parts as those of the first embodiment are designated by the same reference numerals and only different parts will be described.

Also in this embodiment, the lower duct 32 is not provided with the duct portion 32a in the first embodiment, but instead is provided with the duct portion 32e located on the left side of the supply port 34 in the drawing. A blowout port 32f for blowing the cool air into the chilled chamber 25 is formed at the front of the duct portion 32e. On the other hand, on the left side of the upper duct 33 in the drawing, the first duct portion 33a and the second duct portion 3 are provided.
3b, a partition rib 37 is provided, and the partition rib 37 forms a third duct portion 33d extending in the direction opposite to the first duct portion 33a. And
The lower end of the third duct part 33d is communicated with the duct part 32e of the lower duct 32, and is supplied from the supply port 34 to the first duct part 3d.
Part of the cool air discharged to 2a is supplied to the third duct portion 33d and then to the chilled chamber 25. In addition,
A lateral rib 36a is extended from the upper end of the partition rib 36 on the right side to blow cold air flowing upward through the first duct portion 33a and divide the cold air into the third duct portion 33d. .

In the case of such a structure, as compared with the structure of the second embodiment, the amount of cold air supplied to the third duct portion 33d becomes stable, and the temperature control of the chilled chamber 25 becomes more stable. It can be carried out.

The present invention is not limited to the embodiments described above and shown in the drawings. For example, the present invention is not limited to the supply of cold air to a refrigerating room, but can be widely applied to the case of supplying cold air through a duct. The present invention can be variously modified and implemented without departing from the above.

[0032]

As described above, according to the present invention,
The following effects can be obtained. In the refrigerator according to claim 1, the duct includes a first duct portion extending in one direction from a supply port, and a first end portion of the first duct portion.
Of the second duct portion extending in the direction opposite to the duct portion, and a plurality of air outlets are formed in the second duct portion at intervals in the extension direction of the second duct portion, It is possible to equalize the amount of cool air blown from each outlet,
The storage chamber can be cooled to a state where there is little temperature variation.

In the refrigerator according to the second aspect of the present invention, the second duct section is connected to the third duct section for supplying the cool air to another storage chamber, so that the cool air discharged from the supply port is separated. Even when it is supplied to another storage chamber, the amount of cold air distributed to another storage chamber will not be too large or too small.

In the refrigerator according to the third aspect, apart from the second duct portion, cool air is extended from the end portion of the first duct portion to the opposite direction of the first duct portion to cool the other storage chambers. By providing the third duct portion for supplying, it becomes easy to control the amount of cold air supplied to the other storage chambers.

In the refrigerator according to the fourth aspect, the cost can be reduced by using the gas pressure type damper device.

[Brief description of drawings]

FIG. 1 is a front view of a main part showing a first embodiment of the present invention.

[Fig. 2] Rear view of the upper duct

FIG. 3 is a cross-sectional plan view taken along the line BB of FIG.

FIG. 4 is a configuration diagram of a damper device.

[Figure 5] Vertical side view of the entire refrigerator

FIG. 6 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

7 is a partial vertical cross-sectional side view taken along the line CC of FIG.

FIG. 8 is a diagram corresponding to FIG. 1 showing a third embodiment of the present invention.

FIG. 9 is a view corresponding to FIG. 1 showing a conventional duct configuration.

FIG. 10 is a view corresponding to FIG.

FIG. 11 is a vertical sectional side view.

FIG. 12 is a diagram corresponding to FIG. 3 showing a configuration in the case of using one damper device.

[Explanation of symbols]

21 is a refrigerator main body, 22 is a refrigerating room (storage room), 25 is a chilled room (other storage room), 26 is a cooler, 31 is a duct,
32 is a lower duct, 32a and 32e are duct parts, 32b,
32d and 32f are outlets, 32c is a third duct part, 3
3 is the upper duct, 33a is the first duct part, 33b is the second duct
Duct part, 32c is a blowout port, 33d is a third duct part, 34 is a supply port, 35 is a damper device, 35a is a temperature sensing part, 35b is a bellows (operating part), 35c is an opening / closing plate,
6 and 37 are partition ribs.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Satoshi Nanzato Satoshi Nanzato 1-6 Ota Toshiba-cho, Ibaraki-shi, Osaka Stock company Toshiba Osaka factory

Claims (4)

[Claims] 1. A cool air sent from a cooler by a fan is made to flow into a duct from a supply port opened and closed by a damper device and blown out to a storage chamber from a plurality of blowout ports formed in the duct. In the above duct, the duct includes a first duct portion extending in one direction from a supply port, and a second duct portion extending from a terminal end portion of the first duct portion in a direction opposite to the first duct portion. And a plurality of the air outlets are formed in the second duct portion at intervals in the extension direction of the second duct portion. 2. The refrigerator according to claim 1, wherein the second duct portion is communicated with a third duct portion for supplying cold air to another storage chamber. 3. A second duct is provided from the end portion of the first duct section.
3. A third duct part, which is provided in a direction opposite to that of the first duct part, is provided separately from the duct part for supplying cold air to another storage chamber. Refrigerator. 4. The damper device comprises an opening / closing part, a temperature sensing part filled with gas, and an operating part, the temperature sensing part is arranged in a storage chamber, and the gas pressure of the temperature sensing part according to the temperature change in the storage chamber. The refrigerator according to any one of claims 1 to 3, wherein the operating unit is displaced by the change to open and close the opening and closing unit.