JPH06117744A - Refrigerator - Google Patents

Abstract

PURPOSE:To blow cooled air equally from each air outlet of a duct. CONSTITUTION:Cooled air sent from a cooler with a fan is arranged to flow into a first duct section 33a extending upward from a supply port opened and closed with a damper device 35. This cooled air hits against a guide 37 installed to the upper end of this first duct section 33a and flows into a second duct section 33b extending downward by changing its smoothly flowing direction. The cooled air flowing in the second duct section 33b is received with a projected part 39a or 33c so that it may be blown out from an air outlet 38a or 38c while the rest of the cooled air is blown out from an air outlet in the lowest stage, which equalizes the amount of air blown out from each air outlet 38a or 38d.

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. 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 5 from the supply port 3 and flows upward in the upper duct 5, so that there is an interval in the vertical direction. The plurality of outlets 8 provided in this order are blown out into the refrigerating chamber from the lower outlet 8 in order. The damper device 2 uses a motor-type damper device having a motor as a drive source. When the temperature of the refrigerating compartment is lowered to a set temperature, the supply port 3 is closed to stop the supply of cold air to the refrigerating compartment. .

In the example shown in FIGS. 6 to 8, the lower duct 4 is provided with another supply port 10 which is opened and closed by another motor type damper device 9.
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, since the cool air discharged from the supply port 3 is blown upward in the upper duct 5 through the lower outlet port 8 into the refrigerating chamber, each blown air is blown. 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, it is conceivable to replace the damper devices 2 and 9 with an inexpensive gas pressure type damper device to reduce the cost.

However, the gas pressure damper device is provided with a temperature sensing part and an actuating part in which gas is enclosed, and the temperature sensing part is arranged in the refrigerating compartment and the chilled compartment so as to sense the temperature change in the refrigerating compartment and the chilled compartment. Since the operating part is displaced by changing the gas pressure of the warm part to adjust the opening of the opening and closing plate, when it closes to the set temperature, it is not fully closed even if it is closed, but rather opened slightly. It may stay in a state.

In such a state, especially on the refrigerating compartment side, the amount of cold air discharged from the supply port 3 is small, and the flow rate of the cool air flowing into the upper duct 5 is relatively gentle, so that Most of the cool air that has flowed into the duct 5 is blown out into the refrigerating compartment from the outlet 8 at the lowermost stage, which causes a problem that the lower part 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 and evenly blow the cool air from each air outlet. In the case of using the gas pressure type damper device, it is possible to provide a refrigerator in which even if the damper device stops in a slightly opened state, the storage chamber is not likely to be partially supercooled. is there.

[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 a configuration in which the air is blown out 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. And a second duct portion extending in the opposite direction, and at the end portion of the first duct portion, cool air blown from the supply port is redirected to the second duct portion in the extension direction thereof. A guide is provided for allowing the air to flow in, and a plurality of the air outlets are formed in the second duct portion at intervals in the extension direction thereof.

In the second duct portion, a projecting portion for receiving cool air and causing it to blow out from the outlet can be provided at the leeward opening edge of the outlet. In this case, it is preferable that the air outlet on the leeward side is projected higher.

[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, where velocity energy is converted into pressure energy, and this pressure causes the cold air to flow into the second air. The air is blown out from each of the air outlets of the duct portion substantially evenly. In this case, since the cool air blown from the supply port is guided by the guide and smoothly changes its direction, there is no possibility of turbulence.

Further, if each of the outlets is provided with a protrusion, and if the height of the protrusion is set higher toward the leeward side, the amount of cold air blown out from each of the outlets is further increased. It can be made uniform.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 5, which shows the overall configuration of the fan-cool type refrigerator, 21 is a refrigerator main body, and in this refrigerator main body 21, a refrigerating compartment 22, a two-stage freezing compartment 23 and a vegetable compartment 24 are sequentially formed from the top. . In the lower part of the refrigerating room 22, a chilled room 25 is provided as another storage room.
Is provided.

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 via the return path 29 provided in No. 1 and is circulated such that it is cooled by the cooler 26 again and supplied to each chamber. A part of the cold air passage for sending the cool air to the refrigerating chamber 22 is shown with reference numeral 30.

In FIGS. 1 to 4 showing a structure for supplying the cool air sent through the cool air passage 30 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. As shown in FIGS. 3 and 4, the lower duct 32 includes the cold air passage 3
A supply port 34 communicating with 0 is formed, and a damper device 35 for opening and closing the supply port 34 is provided. Further, a horizontally long front duct portion 32a communicating with the supply port 34 is formed at the front portion of the lower duct 32, and an outlet port 32b for blowing cold air into the chilled chamber 25 is formed in the front duct portion 32a. Are formed.

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 part 35a is arranged in the refrigerating compartment 22 which is a storage room, 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 part 35a. 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
Open and close 4.

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 in the upper duct 33. 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.

Then, as shown in FIG. 2, the upper end portion of the upper duct 31, which is the terminal end portion of the first duct portion 33a, is
From one side half of the first duct part 33a to one second duct part 33b, and from the remaining one side half of the first duct part 33a to the other second duct part 33b,
Guides 37, 37 are provided, each of which extends in an arc concave shape.

On the front surface of the second duct portion 33b,
The cool air outlets 38a to 38d are connected to the second duct portion 33.
A plurality of b and 33b are formed at intervals in the vertical direction, which is the extension direction of b and 33b. The rib 36 is formed on the leeward side opening edge of the other outlets 38a to 38e except the lowermost outlet 38d on the back side of the front surface of the second duct portion 33b, that is, the lower opening edge. From the top to the middle of the side surface of the upper duct 33, projections 39a to 39c, which are projections extending laterally, are provided. In this case, as shown in FIG. 2B, the heights h1 to h3 of the protrusions 39a to 39c are set to be higher toward the leeward air outlet.

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 chamber 27 by the fan 28 flows into the lower duct 32 from the supply port 34 and reaches the front duct portion 32a of the lower duct 32 and the first duct portion 33a of the upper duct 33. Divert. Lower duct 3
The cold air flowing into the second front duct portion 32a blows out into the chilled chamber 25 from the blowout port 32b.

On the other hand, the first duct portion 33 of the upper duct 33
The cold 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 to change the flow direction, and then flows into the second duct portion 33b.
And flows downward in the second duct portion 33b.

Here, if the end portion of the first duct portion 33a is a flat surface, the first duct portion 33 will be described.
When the cold air flowing upward in the a hits the flat surface, a turbulent flow is generated there. When the turbulent flow occurs, energy is lost accordingly, and as a result, the amount of cold air supplied into the refrigerating chamber 22 decreases.

However, in the present embodiment, since the arc-shaped concave guide 37 is provided at the terminal end portion of the first duct portion 33a, it flows upward in the first duct portion 33a. Due to the guide action of the guide 37, the cool air smoothly reverses the direction of flow as shown by an arrow C in FIG. 2A, and flows into the second duct portion 33b. Therefore, unlike the case where the end portion of the first duct portion 33a is a flat surface, the first duct portion 33a
There is no inconvenience that the cold air flowing upward in the interior causes turbulence, and as a result, the amount of cold air supplied to the refrigerating chamber 22 increases.

Now, as described above, the first duct portion 33
The cold air flowing upward in a is in the first duct portion 3
When hitting the upper end of 3a, the energy of the velocity of the cold air is partially converted to the energy of the pressure, and the second duct portion 33b.
The cold air that has flowed into the air blows out at the outlets 38a through 3
It comes out from the 8d into the refrigerator compartment 22.

Therefore, the amount of cool air blown out from each of the air outlets 38a to 38d provided at intervals in the vertical direction is equal (accurately, an amount corresponding to the size of the air outlet, that is, each air outlet 38a). If the size of 38 to 38d is the same, the same amount)
Therefore, it is possible to prevent variations in the temperature of the refrigerating chamber 22.

By the way, since the cool air flows downward in the second duct portion 33b, it cannot be denied that the quantity of the cool air blown out from each of the outlets 38a to 38d tends to be different due to the influence of the flow. However, this is a projecting piece 39 on the leeward side of the upper outlets 38a to 38c.
This can be solved by providing a to 39c.

That is, when the projecting pieces 39a to 39c are provided, the cool air flowing downward is received by the projecting pieces 39a to 39c and blown out from the air outlets 38a to 38c. Therefore, the amount of cold air blown out from the air outlets 38a to 38c depends on the amount of cold air received by the projecting pieces 39a to 39c.
The amount of cold air blown from 8a to 38c can be made equal to the amount of blowout from the blowout port 38d at the lowermost stage, and each blowout port 38a to 3c.
The amount of cold air blowout of 8d can be made uniform.

In this case, in this embodiment, the protrusion 39a is particularly used.
Since the projecting heights of Nos. 39 to 39c are set to be higher on the leeward side, the problem that the lower projecting piece becomes a so-called shadow of the upper projecting piece and the upper one receives a larger amount of cold air can be solved. Therefore, the amount of cool air received by each of the protrusions 39a to 39c, and consequently the amount of cool air blown out from each of the outlets 38a to 38c, can be made more uniform.

When the temperature of the refrigerating chamber 22 decreases to the set temperature, the opening / closing plate 35c closes the supply port 34, but at this time, the opening / closing plate 35c stops with the supply port 34 slightly open, and the supply port 34 Although a small amount of cold air may flow out, even in this case, for the same reason as described above, the outlets 38a to 38d of the second duct portion 33b are provided.
The amount of cold air blown out from the same is equal, and there is no possibility that the inside of the refrigerating chamber 22 will be locally supercooled.

Although the damper device 35 is of the gas pressure type in the above embodiment, 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.

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

[0033]

As described above, according to the present invention,
The following effects can be obtained. In the refrigerator according to claim 1, the duct comprises a first duct part and a second duct part extending from a terminal end portion of the first duct part in a direction opposite to the first duct part, The cold air blown from the supply port is supplied to the second end of the first duct part.
By providing a guide for changing the direction of the duct portion to the inflow direction and inflowing the duct portion, the amount of cold air blown out from each blowout port can be made uniform, and at the same time, the first
It is possible to prevent the turbulent flow from being generated when the cold air flowing through the duct section is redirected and flows into the second duct section as a result, and as a result, the cold air supply amount to the storage chamber can be increased.

In the refrigerator according to the second aspect of the present invention, the second duct portion is provided with a protrusion for receiving cool air and blowing it out from the outlet at the leeward opening edge of each outlet. The amount of cold air blown out from each cold air blowout port can be made more uniform.

In the refrigerator according to the third aspect of the present invention, the height of the protrusion is set higher toward the leeward outlet, so that the leeward protrusion is affected by the windward protrusion. Therefore, the amount of cold air blown out from each cold air blowout port can be made more uniform.

[Brief description of drawings]

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

FIG. 2 is a rear view and a vertical side 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 diagram corresponding to FIG. 1 showing a conventional duct configuration.

FIG. 7 is a view corresponding to FIG.

FIG. 8 is a vertical sectional side view.

[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
Is a duct, 34 is a supply port, 35 is a damper device, 36 is a partition rib, 37 is a guide, 38a to 38d are outlets, and 39a to 39c are projections (projections).

Claims (3)

[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, the duct includes a first duct portion extending in one direction from the supply port,
The second duct portion extends in the opposite direction to the first duct portion from the end portion of the first duct portion, and the end portion of the first duct portion is blown with air from the supply port. A guide for changing the direction of the cold air into the second duct portion to flow into the second duct portion is provided, and a plurality of the outlets are formed in the second duct portion at intervals in the extension direction. Refrigerator characterized by doing. 2. A projection for receiving cool air and causing it to blow out from the blower outlet is provided at an opening edge portion on the leeward side of the blower outlet in the second duct portion. Refrigerator according to 1. 3. The refrigerator according to claim 2, wherein the protrusion has a higher protrusion toward the leeward air outlet.