JPH09138051A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator to enlarge a chamber effective volume in a heat insulation box and improve the efficiency of a flow of cold air. SOLUTION: In a refrigerator 1, by partitioning the interior of a heat insulation box body 6 by a partition wall 8, a refrigerating room 13 and a cold room 11 are constituted, and cold air cooled by a cooler 23 is fed in a distributing manner to the two rooms by a blower 24. The refrigerator comprises a guide duct 26 formed in the partition wall 8 and guiding cold air from the cooler 23 to the cold room 11, and a damper 33 arranged in the guide duct 26 and regulating an amount of cold air flowing through the duct 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator in which a heat insulating box is partitioned by partition walls, and cool air from a cooler is distributed and supplied into each room by a blower.

[0002]

2. Description of the Related Art Conventionally, this type of refrigerator is disclosed in, for example, Japanese Utility Model Publication No. 6-12301 (F25D23 / 00). 8 shows a conventional refrigerator 101 according to FIGS. 6 and 7. The refrigerator 101 is a heat-insulating box body 10 with a front opening formed by filling an outer box 102 made of a steel plate and an inner box 103 made of a hard resin with a heat insulating material 104 such as polyurethane foam by an in-situ foaming method.
6. The inside of this heat insulating box 106 is
The heat insulation material 1 is formed integrally with the inner box 103 and is formed inside.
The upper partition wall 108 and the lower partition wall 109 that house 07 are partitioned into upper and lower three chambers. The upper compartment wall 108 has a refrigerating compartment 111 and the lower compartment wall 109 has a vegetable compartment 1 below.
12, a freezing room 113 is provided between them.

The front opening of the refrigerating compartment 111 is closed by a rotatable heat insulating door 114 so that it can be opened and closed.
The freezer compartment 113 and the vegetable compartment 112 have a container 11 with an upper opening.
Draw-out type heat-insulating doors 114 and 116 having 4A, 116A, and 117A (the freezing chamber 113 has two upper and lower stages), 1
Each of them is closed by 17 so as to be openable and closable.

A partition plate 12 is provided in the deep part of the freezer compartment 113.
1, the cooling chamber 122 is partitioned and formed, and the cooler 123 is vertically installed in the cooling chamber 122. A blower 124 is provided above the cooler 123, and the freezing chamber discharge port 113A is provided at the upper and central portions of the partition plate 121.
However, a suction port 113B for the freezer compartment is formed in the lower part.

Further, the molded heat insulating material 10 in the upper partition wall 108.
A guide duct 126 is formed in a rear portion of the inside of the inside 7 through the upper and lower sides, and the guide duct 126 bypasses the blower 124, and the inside of the cooling chamber 122 and the refrigerating chamber 1 are formed.
11 communicates with the inner and lower ends. On the other hand, the refrigerator compartment 111
A back duct plate 127 is attached to the back of the inner box 103 with a gap from the back of the inner box 103.
Refrigerator rear duct 12 extending vertically between the inner box 103 and the inner box 103
8 are formed.

The lower end of the refrigerating compartment rear duct 128 is communicatively connected to a heat insulating damper case 131 provided on the upper partition wall 108 in the lower inner portion of the refrigerating compartment 111, and the lower part of the damper case 131 is guided by the guide. The duct 126 communicates with the upper end of the duct 126, and in the damper case 131, the refrigerating compartment rear duct 128 and the guide duct 126 communicate with each other. Further, in the damper case 131, the refrigerator compartment 11
A damper thermostat 132 that detects the temperature inside the refrigerator compartment 1 and opens and closes the flow path to the refrigerating compartment rear duct 128 is housed, and the refrigerating compartment discharge port 1 is provided on the front surface of the rear duct plate 127.
11A is formed.

On the front side of the damper case 131, there is formed an ice temperature corner 133 which is substantially partitioned from the inside of the surrounding refrigerating chamber 111, and the damper case 131 is also formed with a discharge port 133A for the ice temperature corner 133. ing. Further, a cold air introduction port 134 to the vegetable compartment 112 is formed in the inner portion of the ice temperature corner 133, and this cold air introduction port 134 is formed.
And the vegetable compartment outlet 112A formed in the vegetable compartment 112,
They are communicated with each other through a vegetable room duct 136 that descends inside the heat insulating material 104.

Further, the molded heat insulating material 10 in the lower partition wall 109.
A vegetable compartment return duct 138 is formed in the vegetable compartment 1.
The inner upper part of 12 and the lower part of the cooling chamber 122 communicate with each other.

With the above construction, a compressor (not shown) which constitutes a known refrigeration cycle with the cooler 123 and the blower 1
When 24 is operated, the cool air cooled by the cooler 123 is blown into the freezer compartment 113 from the freezer compartment discharge port 113A by the blower 124. Then, after cooling by circulating in the freezer compartment 113, the cool air is cooled by the lower freezer inlet 11
It returns to the lower part in the cooling chamber 122 from 3B. Thereby, the freezer compartment 113 is maintained at a predetermined freezing temperature (about -20 ° C).

Further, a part of the cool air blown out from the blower 124 flows into the guide duct 126, rises in the refrigerating compartment rear duct 128 via the damper thermostat 132, and then the refrigerating compartment discharge port 111A. It is blown out into 111. The damper thermostat 132 controls the opening and closing of the supply of cool air to the duct 128 based on the temperature inside the refrigerating chamber 111, and maintains the temperature inside the refrigerating chamber 111 at a predetermined refrigerating temperature (for example, about + 5 ° C.). In addition, ice temperature corner 13
Since a relatively large amount of cold air is supplied to the narrow area in 3,
For example, it is cooled to a low temperature of about 0 ° C to -1 ° C.

Further, in the refrigerating room 111 (the ice temperature corner 13
The cold air which has circulated (including inside 3) is cooled by the cold air inlet port 134.
It further flows into the vegetable room duct 136, and is discharged into the vegetable room 112 through the vegetable room outlet 112A. Then, after circulating inside the vegetable compartment 112 and indirectly cooling the inside of the container 117A, the cool air returns to the lower inside of the cooling chamber 122 through the inside of the vegetable compartment return duct 138 formed in the lower partition wall 109. As a result, the vegetables in the container 117A are kept at a temperature of about + 8 ° C to + 10 ° C while being prevented from being dried.

[0012]

As described above, the cold air supply to the refrigerating chamber 111 is conventionally controlled by the damper thermostat 132 provided in the damper case 131 attached to the inner portion of the upper partition wall 108. The damper thermostat 132 is composed of a main body 132A in which a gas-filled bellows is incorporated and a baffle plate 132B provided so as to project upward from the main body 132A. By moving the baffle plate 132B back and forth, a damper case is formed. The air passage entrance 131A in 131 was opened and closed.

Therefore, the internal volume of the refrigerating chamber 111, in particular,
The volume of the lower part (including the ice temperature corner 133) is significantly narrowed, and improvement has been desired. Also,
Since the flow of the cool air is complicated, for example, the air passage inlet 131A needs to be formed in the damper case 131, there is a problem that the flow resistance of the cool air to the refrigerating chamber 111 increases and the air volume decreases. .

The present invention has been made in order to solve the above-mentioned conventional technical problems, and it is an object of the present invention to provide a refrigerator in which the effective volume of the inside of the heat-insulating box can be expanded and the distribution of cold air can be made efficient. To aim.

[0015]

According to another aspect of the present invention, a refrigerator has a first storage chamber and a second storage chamber which are formed by partitioning a heat-insulating box with partition walls, and is cooled by a cooler. And a duct for distributing the cooled cool air into both storage chambers by a blower, the duct being configured in the partition wall and guiding the cool air from the cooler into the second storage chamber. , A damper for adjusting the amount of cold air flowing through the duct.

In the refrigerator according to the second aspect of the present invention, the inside of the heat-insulating box is divided by the partition wall to form a freezer compartment and a refrigerating compartment, and a cooler and a blower are installed in the deep part of the freezer compartment. The cool air cooled by the air is distributed and supplied to both chambers by a blower, and the duct formed in the rear part of the partition wall for guiding the cool air from the cooler into the refrigerating room is provided in this duct. , A damper for adjusting the amount of cold air flowing through the duct.

According to this structure, since the damper is provided in the duct formed in the rear portion of the partition wall, the effective volume in the second storage chamber (refrigerating chamber) can be narrowed by the damper thermostat as in the prior art. Disappears. Also,
By providing the damper in the duct, the shape of the duct can be simplified and the flow of cold air can be simplified, so that the supply air amount can be increased.

According to the third aspect of the present invention, in the refrigerator in each of the above inventions, a molded heat insulating material is provided in the partition wall, and a duct and a damper are provided in the molded heat insulating material.

According to this structure, since it is possible to previously mount the damper inside the molded heat insulating material and then mount it in the partition wall in that state, it is possible to remarkably improve the assembly workability. .

According to the fourth aspect of the present invention, in the above refrigerator, the damper is rotatably provided in the duct, and the motor for rotating the damper is provided in the molded heat insulating material outside the duct.

According to this structure, the entire device including the damper and the motor can be downsized, the effective volume in the heat insulating box can be further improved, and the motor is in the molded heat insulating material. It also reduces the risk of failure.

[0022]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a vertical side view of a refrigerator 1 of the present invention,
FIG. 2 is a front view of the refrigerator 1 (excluding the door. Partially see through). The refrigerator 1 has an outer box 2 made of steel plate and an inner box 3 made of hard resin.
A heat-insulating box body 6 having a front opening is formed by filling a heat-insulating material 4 such as foamed polyurethane in a space therebetween by an in-situ foaming method. The inside of this heat-insulating box body 6 is integrally molded with the inner box 3 and has an upper partition wall 8 in which the molded heat insulating materials 5 and 7 are housed, and similarly, the molded heat insulating material 10 is housed therein. Is divided into three upper and lower chambers by a lower partition wall 9, an upper compartment wall 8 is provided with a refrigerating compartment 11 (second storage compartment), a lower compartment wall 9 is provided with a vegetable compartment 12, and a space between them is a freezing compartment 13. (First storage room).

The front opening of the refrigerating compartment 11 is openably and closably closed by a rotary heat insulating door 14, and the freezing compartment 13 and the vegetable compartment 12 are provided with a container (not shown) having the same top opening as described above. Pull-out type insulated doors 15 and 16 equipped
(The freezer compartment 13 is in the upper and lower stages) and 17 are closed and opened respectively.

A cooling chamber 22 is defined by a partition plate 21 in the deep part of the freezing chamber 13, and a cooler 23 is vertically installed in the cooling chamber 22. A blower 24 is provided above the cooler 23, and a freezer compartment discharge port 13A is formed at an upper portion and a center portion of the partition plate 21, and a freezer compartment suction port 13B is formed at a lower portion. .

Further, the molded heat insulating material 7 in the rear portion of the upper partition wall 8 is made of, for example, styrofoam, and a guide duct 26 is formed in the molded heat insulating material 7 so as to vertically penetrate therethrough. Bypasses the blower 24 and communicates with the inside of the cooling chamber 22 and the rectangular opening 20 formed on the upper surface of the upper partition wall 8 (inner box 3) at the inner and lower ends of the refrigerator compartment 11.

On the other hand, a rear duct plate 27 is attached to the inner part of the refrigerating compartment 11 at a distance from the rear surface of the inner box 3,
A refrigerator rear duct 28 extending vertically is formed between the rear duct plate 27 and the inner box 3. The lower end of the refrigerator compartment rear duct 28 is communicated with the upper end of the guide duct 26 so as to close the opening 20 from above. Further, the front surface of the rear duct plate 27 is formed with the refrigerating chamber discharge ports 11A.

A damper device 31 is attached to the upper end of the guide duct 26 in the molded heat insulating material 7.
As shown in FIGS. 3 to 5, the damper device 31 has a rectangular case 32 whose upper and lower surfaces are opened, a damper 33 rotatably provided in the case 32, and an outer surface of the case 32. A motor 34 including a stepping motor or a DC motor for driving the damper 33 to rotate.
It is composed of

A flange 36 is formed on the peripheral edge of the upper end opening of the case 32 so as to spread outward, and seal portions 37 and 38 are provided on the front half and the rear half of the inner surface of the case 32 over a small amount of steps (37 is a higher step). ) Is formed. Further, the damper 33 is rotatable by a shaft portion 33A extending between the seal portions 37 and 38 to the left and right, and when the damper 33 is in a substantially horizontal state, the peripheral edge has a lower surface of the seal portion 37 and an upper surface of the seal portion 38. To close the air passage in the case 32, and in the vertical state, the air passage in the case 32 is substantially fully opened. The output shaft of the motor 34 is connected to the shaft portion 33A of the damper 33.

Before the molded heat insulating material 7 is incorporated into the upper partition wall 8, the damper device 31 is inserted and installed in the guide duct 26 in the molded heat insulating material 7 from the upper end opening. As a result, the air passage in the case 32 becomes a part of the guide duct 26. At this time, the outer surface of the case 32 is in close contact with the inner surface of the guide duct 26, and the flange 36 provided all around the case 32 is in close contact with the upper surface of the molded heat insulating material 7 to seal the space between the guide duct 26 and the damper device 31. To do. The motor 34 is embedded in the molded heat insulating material 7.

With the damper device 31 attached in this way, the molded heat insulating material 7 is incorporated into the upper partition wall 7. At this time, the upper opening of the damper device 31 is aligned with the opening 20 of the upper partition wall 7. It becomes a form that matches.

Although the above-mentioned ice temperature corner is not formed in each drawing, a similar corner may or may not be provided in the lower part of the refrigerating compartment 11. In addition, a cold air inlet 41 to the vegetable compartment 12 is formed in the lower inner portion of the refrigerating compartment 11, and the cold air inlet 41 and the vegetable compartment outlet 12 </ b> A formed in the vegetable compartment 12 are inside the heat insulating material 4. Are communicated with each other through a vegetable room duct 42 that descends.

Further, a vegetable compartment return duct 43 is formed in the molded heat insulating material 10 in the lower partition wall 9 to connect the upper portion of the vegetable compartment 12 and the lower portion of the cooling chamber 22.

With the above construction, the compressor 23 and the blower 24, which are not shown in the drawing, constitute a known refrigeration cycle with the cooler 23.
Is operated, the cool air cooled by the cooler 23 is blown into the freezer compartment 13 from the freezer compartment outlet 13A by the blower 24. After cooling in the freezer compartment 13 by cooling, the cool air is supplied from the lower freezer inlet 13B to the cooling compartment 2.
Return to the lower part of 2. Thereby, the freezer compartment 13 is maintained at a predetermined freezing temperature (about -20 ° C).

A part of the cool air blown out from the blower 24 flows into the guide duct 26, passes through the case 32 (with the damper 33) of the damper device 31 and flows from the opening 20 into the refrigerating compartment rear duct 28. And the duct 2
After rising in the inside 8, the air is blown into the refrigeration room 11 from the refrigeration room discharge ports 11A.

The motor 34 of the damper device 31 is controlled by a control device (not shown) equipped with a sensor for detecting the temperature inside the refrigerating chamber 11, and the damper 33 is rotationally driven as shown by an arrow in FIG. 26) Adjust the amount of cold air flowing through the inside. Thereby, the supply of cold air to the refrigerator compartment rear duct 28 is controlled, and the temperature in the refrigerator compartment 11 is maintained at a predetermined refrigerator temperature (for example, about + 5 ° C.).

The cold air circulated in the refrigerating compartment 11 flows into the vegetable compartment duct 42 through the cold air inlet 41, and is discharged into the vegetable compartment 12 through the vegetable compartment outlet 12A. Then, after circulating inside the vegetable compartment 12 and indirectly cooling the inside of the container (not shown), the cool air returns to the lower part inside the cooling compartment 22 through the vegetable compartment return duct 43 formed in the lower partition wall 9. Thereby, the vegetables in the container are kept at a temperature of about + 8 ° C to + 10 ° C while being prevented from being dried.

As described above, according to the present invention, since the damper 33 is provided in the guide duct 26 formed in the molded heat insulating material 7 in the rear portion of the upper partition wall 8, the inside of the refrigerating chamber 11 is effectively operated by the damper thermostat as in the conventional case. The volume is no longer reduced. Further, the damper 33 is connected to the guide duct 26.
By installing inside, duct shape (guide duct 26)
Can be simplified and the flow of cold air is also simplified, so that the supply air volume can be increased.

Further, since it is possible to previously mount the damper device 31 in the molded heat insulating material 7 and to install it in the upper partition wall 8 in that state, the assembling workability can be remarkably improved. Become. Further, the damper device 31
Is a damper 33 that will be located in the guide duct 26
And the motor 34 which is located inside the molded heat insulating material 7 outside the guide duct 26 and rotationally drives the damper 33, the damper device 31 as a whole can be miniaturized, and the heat insulating box body 6 (the freezing chamber 13 and Further improvement of the effective volume in the refrigerating compartment 11) can be realized, and since the motor 34 is in the molded heat insulating material 7, the risk of causing a failure due to dew condensation on the inner surface of the case 32 is reduced.

In the embodiment, the refrigerating compartment 11, the freezing compartment 13 and the vegetable compartment 12 are formed from above in the heat insulating box 6, but the layout is not limited to this, and the compartments are arranged in the left-right direction. The present invention is effective even when a partition is formed.

Further, the damper is not limited to the motor type, and a damper thermostat utilizing a change in gas pressure due to temperature may be used. Furthermore, urethane foam may be used as the heat insulating material of the partition wall, and the duct provided in the partition wall may be a molded product such as injection molding.

[0041]

As described above in detail, the first and second aspects of the invention are described.
According to the invention, since the damper is provided in the duct formed in the rear portion of the partition wall, it is not necessary to narrow the effective volume in the second storage chamber (refrigerating chamber) by the damper thermostat as in the conventional case. Further, by providing the damper in the duct, the duct shape can be simplified and the flow of cold air can be simplified, so that the supply air amount can be increased.

According to the invention of claim 3, in addition to the above inventions, the molded heat insulating material is arranged in the partition wall, and the duct and the damper are provided in the molded heat insulating material. The damper can be attached and placed in advance in the molded heat insulating material of the wall, and in that state, it can be incorporated into the partition wall, and the assembling workability can be remarkably improved.

Further, according to the invention of claim 4, in addition to the above, the damper is rotatably provided in the duct, and a motor for rotationally driving the damper is provided in the molded heat insulating material outside the duct. As a result, the entire device consisting of the damper and the motor can be downsized, and the effective volume inside the heat insulation box can be further improved. In addition, since the motor is inside the molded heat insulation material, failure due to dew condensation etc. occurs. The risk is also reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a refrigerator of the present invention.

FIG. 2 is a partially transparent front view of the refrigerator of the present invention.

FIG. 3 is a plan view of a damper device.

FIG. 4 is a front view of a damper device.

FIG. 5 is a vertical sectional side view of the damper device.

FIG. 6 is a vertical sectional side view of a conventional refrigerator.

FIG. 7 is a partially transparent plan view of a conventional refrigerator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator 4 Heat insulating material 6 Heat insulating box 7 Molded heat insulating material 8 Upper partition wall 9 Lower partition wall 11 Refrigerator room 13 Freezer room 21 Partition plate 23 Cooler 24 Blower 31 Damper device 32 Case 33 Damper 34 Motor

Claims (4)

[Claims] 1. The first storage chamber and the second storage chamber are configured by partitioning the inside of the heat-insulating box with partition walls, and the cool air cooled by the cooler is distributed and supplied to both storage chambers by a blower. In the refrigerator configured as described above, a duct configured in the partition wall for guiding the cool air from the cooler into the second storage chamber, and a duct provided in the duct for adjusting the amount of cold air flowing in the duct. A refrigerator provided with a damper. 2. A refrigerating compartment and a refrigerating compartment are formed by partitioning the inside of the heat insulating box with partition walls, and a cooler and a blower are installed in the inner part of the freezing compartment to cool the cool air cooled by the cooler. In a refrigerator configured to distribute and supply into both chambers by the blower, a duct formed in a rear portion of the partition wall for guiding cold air from the cooler into the refrigerating chamber, and a duct provided in the duct, And a damper for adjusting the amount of cold air flowing through the refrigerator. 3. The refrigerator according to claim 1 or 2, wherein a molded heat insulating material is arranged in the partition wall, and a duct and a damper are provided in the molded heat insulating material. 4. The refrigerator according to claim 3, wherein the damper is rotatably provided inside the duct, and a motor that rotationally drives the damper is provided inside the molded heat insulating material outside the duct. .