JPH09145223A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict the increase in ventilating resistance due to a damper and the reduction of effective volume in a refrigerator. SOLUTION: The inside of heat insulating box body of a refrigerator 1 is constituted of a freezing chamber 13 and a refrigerating chamber 11, partitioned by a partitioning wall 8 while cold air, cooled by a cooler, is distributed by a fan 24 into both chambers to supply it. In this case, the refrigerator is provided with a guide duct 26, guiding cold air from the cooler into the refrigerating chamber 11, and a damper device 3, provided in the guide duct 26 and regulating the amount of cold air, passing through the duct, while the guide duct 26 is provided with an opening 20 at one end thereof and the damper device 31 is provided with a flange 36, inserted into the duct 26 through the opening of the same and attached to the peripheral rim 52 of the opening so as to be airtight.

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 A conventional refrigerator of this type is, for example,
-12301 (F25D23 / 00). 9 shows a conventional refrigerator 101 according to FIGS. 9 and 10. 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,
Damper case 1 including damper thermostat 132
31 is attached from the front side (ice temperature corner 133 side), and the air passage is bent to complicate the flow of cold air, such as forming the air passage inlet 131A opening to the front in the damper case 131. There was also a problem that the ventilation resistance of the cool air to the chamber 111 was increased and the air volume was decreased.

The present invention has been made to solve the above-mentioned conventional technical problems, and it is an object of the present invention to provide a refrigerator capable of suppressing an increase in ventilation resistance by a damper and a decrease in effective volume in a refrigerator. To aim.

[0015]

In the refrigerator of the present invention, the first storage chamber and the second storage chamber are constituted by partitioning the inside of the heat insulating box with partition walls, and the cool air cooled by the cooler is provided. And a duct for guiding the cool air from the cooler into the second storage chamber, and the amount of cold air flowing in the duct, which is provided in the duct. A damper device for adjusting, the duct has an opening at one end, the damper device is inserted into the duct through the opening of the duct, and
It has a flange hermetically attached to the peripheral edge of the opening.

According to this structure, since the damper device is provided in the duct for guiding the cool air in the second storage chamber, the effective volume in the second storage chamber (refrigerating chamber) is set by the damper thermostat as in the prior art. Is no longer narrowed. Further, since the damper device is inserted into the duct through the opening at one end of the duct, the shape of the air passage around the damper device can be simplified, and the ventilation resistance of the cool air is reduced, so that the second device is provided. It is possible to increase the amount of cold air supplied to the storage room. Furthermore, since the damper device has a flange that is airtightly attached to the peripheral edge of the opening, the flow of cold air that bypasses the damper device can be prevented, and the control performance of the amount of cold air supply is improved.

According to the invention of claim 2, in addition to the above, the peripheral edge portion of the opening with which the flange of the damper device abuts is set higher than the outer portion thereof.

According to this structure, in addition to the above, when water such as broth of food is spilled into the second storage chamber,
Leakage related to the inside of the damper device will not flow in,
It is possible to avoid the occurrence of malfunction due to water infiltration.

According to the invention of claim 3, in addition to the above inventions, a recess is provided on the outer periphery of the peripheral edge of the opening of the duct, and this recess is provided with a drainage pipe communicating with the storage chamber below the recess. is there.

According to such a structure, the above-mentioned water leakage can be received in the concave portion on the outer periphery of the opening, and can be discharged through the drainage pipe to the storage chamber lower than that for treatment.

[0021]

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 pass therethrough. The upper end opening 20 of the guide duct 26 is
It is formed on the upper surface of the molded heat insulating material 7 located at the lower rear end inside the refrigerator compartment 11. And the guide duct 26 is provided with the blower 24
The inside of the cooling chamber 22 and the opening 20 are communicated in such a manner as to bypass the cooling medium.

Further, as shown in FIG. 6, a concave portion 51 is formed in a portion outside the peripheral edge portion 52 of the opening 20 of the molded heat insulating material 7 (upper partition wall 8), whereby the peripheral edge portion 52 is outside thereof. Is higher than the portion, that is, the concave portion 51. In addition, as shown in FIG. 7, the peripheral portion 5 is formed without forming the concave portion 51.
2 may be formed higher than its outer side (this portion becomes a recess).

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 entire circumference 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 across the left and right sides to allow a small step (37 Are 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 into the guide duct 26 in the molded heat insulating material 7 from the opening 20 at the upper end thereof and attached. 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 comes into close contact with the inner surface of the guide duct 26, and
The flanges 36 provided on the entire circumference of 2 are in airtight contact with the upper surface of the peripheral edge portion 52 of the opening 20 to seal between the guide duct 26 and the damper device 31. The motor 34 is embedded in the molded heat insulating material 7. Then, with the damper device 31 attached in this way, the molded heat insulating material 7 is incorporated into the upper partition wall 7.

Although the above-mentioned ice temperature corner is not formed in each drawing, the same corner may or may not be provided in the lower part of the refrigerator compartment 11.

A vegetable compartment 12 is provided in the lower part of the refrigerator compartment 11.
A cold air inlet 41 is formed, and the cold air inlet 41 and the vegetable room discharge port 12A formed in the vegetable room 12 are
It communicates with a vegetable room duct 42 that descends in the heat insulating material 4.

Further, on the bottom surface of the recess 51 on the outer periphery of the opening 20, a drainage pipe 56 embedded in the molded heat insulating material 7 is formed.
Are connected at their upper ends. The drainage pipe 56 extends while inclining to the right toward the inside of the molded heat insulating material 7 and has a lower end communicating with the side wall of the vegetable compartment duct 42.

As a result, the recess 51 communicates with the vegetable compartment 12 below it via the vegetable compartment duct 42. Furthermore, 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).

Further, 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 in 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 device 31 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 damper thermostat is provided inside the refrigerating chamber 11 as in the prior art. The effective volume is not narrowed. Further, since the damper device 31 is inserted into the duct from the opening 20 of the guide duct 26, the duct shape (the guide duct 26) can be simplified, and the flow of cold air is also simplified. Can be increased.

Further, since the damper device 31 has the flange 36 which is airtightly attached to the peripheral edge portion 52 of the opening 20, it is possible to prevent the flow of the cool air that bypasses the damper device 31 and improve the control performance of the cold air supply amount. To be done.

Further, since the motor 34 is located inside the molded heat insulating material 7, it does not break down due to dew condensation, and the peripheral edge portion 52 of the opening 20 with which the flange 36 of the damper device 31 abuts is the outer portion, that is, the peripheral portion 52. Since the height is set higher than that of the concave portion 51, even when water such as boiling water of food is spilled into the refrigerating compartment 11, the leaked water flows into the concave portion 51 and is received. Therefore, the leakage of water into the damper device 31 does not flow in, and there is no risk that the damper 33 or the motor 34 will be flooded and malfunction will occur.

The leaked water flowing into the recess 51 passes through the drainage pipe 56, flows out to the vegetable compartment duct 42, flows down there, and is guided to the vegetable compartment 12. And the vegetable room 12
The leaked water flowing into the inside eventually becomes frost and adheres to the cooler 23, and then becomes drain water and is discharged to the outside.

Furthermore, since it is possible to previously mount the damper device 31 inside the molded heat insulating material 7 and to incorporate it into the upper partition wall 8 in that state, it is possible to remarkably improve the assembly workability. become. Further, since the damper device 31 is composed of the damper 33 which is located inside 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 entire damper device 31 can be downsized, and the effective volume in the heat insulating box 6 (the freezer compartment 13 and the refrigerating compartment 11) can be further improved.

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 device is not limited to the motor type, and a mechanical damper such as a damper thermostat which utilizes 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.

[0045]

As described above in detail, according to the present invention, the second
Since the damper device is provided in the duct for guiding the cool air in the second storage chamber, the effective volume in the second storage chamber is not narrowed by the damper thermostat as in the conventional case. Further, since the damper device is inserted into the duct through the opening at one end of the duct, it becomes possible to simplify the shape of the air passage around the damper device.
It is possible to reduce the ventilation resistance of the cool air and increase the amount of the cool air supplied to the second storage chamber. Furthermore, since the damper device has a flange that is airtightly attached to the peripheral edge of the opening, the flow of cold air that bypasses the damper device can be blocked, and the control performance of the cold air supply amount can be improved.

Further, in addition to the above, according to the invention of claim 2, the opening peripheral portion with which the flange of the damper device abuts is set to be higher than the outer portion thereof, so that water such as boiling water of food is stored in the second storage chamber. Even if the water is spilled, the leakage of water into the damper device does not flow in, and it is possible to prevent the occurrence of malfunction due to water infiltration.

Further, in addition to the above-mentioned inventions, the invention of claim 3 is provided with a recess on the outer periphery of the peripheral edge of the opening of the duct, and this recess is provided with a drainage pipe communicating with the storage chamber below the recess. Therefore, the leaked water as described above can be received in the concave portion on the outer circumference of the opening, and can be discharged through the drainage pipe to the storage chamber lower than that.

[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 an enlarged vertical side view of the refrigerator of the present invention in the guide duct portion.

FIG. 7 is an enlarged vertical side view corresponding to FIG. 6 of a refrigerator according to another embodiment of the present invention.

FIG. 8 is an enlarged vertical sectional front view of the refrigerator of the present invention on the upper partition wall portion.

FIG. 9 is a vertical sectional side view of a conventional refrigerator.

FIG. 10 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 body 7 Molded heat insulating material 8 Upper partition wall 9 Lower partition wall 11 Refrigerator room 12 Vegetable room 13 Freezer room 20 Opening 21 Partition plate 23 Cooler 24 Blower 31 Damper device 32 Case 33 Damper 34 Motor 42 Vegetable room duct 51 Recessed portion 52 Peripheral portion 56 Drain pipe

Claims (3)

[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, the duct includes a duct for guiding the cool air from the cooler into the second storage chamber, and a damper device provided in the duct for adjusting the amount of cool air flowing in the duct. The refrigerator has an opening at one end, and the damper device has a flange inserted into the duct through the opening of the duct and airtightly attached to the peripheral edge of the opening. 2. The refrigerator according to claim 1, wherein an opening peripheral edge portion with which the flange of the damper device abuts is set higher than an outer portion thereof. 3. The duct according to claim 1 or 2, wherein a recess is provided on the outer periphery of the peripheral edge of the opening of the duct, and a drain pipe communicating with a storage chamber below the recess is provided in the recess. Refrigerator described.