JPH09269173A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly and efficiently cool by increasing the effective volume in a cold storage chamber. SOLUTION: Cold storage back surface ducts 28 are provided over upper and lower parts of right and left corners of the back surface of a cold storage chamber 11. A plurality of discharge ports 11A for discharging cold gas toward the center in the horizontal direction of the chamber 11 are formed at the ducts 18. The right and left outlets of a branching duct 29 are formed in substantially triangular funnel types. The right and left outlets of the duct 29 are connected to the lower ends of the ducts 28. The cold air from a blower 24 is supplied to the inlet of the duct 29.

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). 7 shows a conventional refrigerator 101 according to FIGS. 5 and 6. 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 115 and 116 equipped with 4A, 116A, and 117A (the freezer compartment 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.
The rear duct 1 of the refrigerating room extending vertically between the inner box 103 and the inner box 103
28 are formed. That is, the refrigerating compartment rear duct 128 is formed vertically between the left and right corners of the rear surface of the refrigerating compartment 111.

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 1 and opens and closes the flow path to the refrigerating compartment rear duct 128 is housed, and the front surface of the rear duct plate 127 is opened in the direction perpendicular to the heat insulating door 114 that closes the front opening. Refrigerator outlet 1
11A is formed.

On the front side of the damper case 131, a low temperature corner 133 which is substantially partitioned from the inside of the surrounding refrigerating chamber 111 is formed, and the damper case 131 is also formed with a discharge port 133A for the low temperature corner 133. . Further, a cold air introduction port 134 to the vegetable compartment 112 is formed at the inner portion of the low temperature corner 133.
And a vegetable compartment outlet 112A formed in the vegetable compartment 112
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, the blown out cool air circulates in the freezing compartment 113 to be cooled, and then returns from the lower freezing compartment suction port 113B to the lower part inside the cooling compartment 122.
As a result, the freezer compartment 113 has a predetermined freezing temperature (-20
℃) is maintained.

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. The inside of 111 is blown toward the heat insulating door 114. The damper thermostat 132 controls the opening and closing of the supply of cold 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 + 3 ° C.). Since a relatively large amount of cold air is supplied to the narrow area in the low-temperature corner 133, it is cooled to a low temperature of, for example, 0 ° C to -1 ° C.

In the refrigerating chamber 111 (the low 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 + 5 ° C to + 6 ° C while being prevented from being dried.

[0012]

However, the refrigerating compartment discharge ports 111A ... Are formed on the front surface of the rear duct plate 127 that faces the heat insulating door 114, and are blown out from the refrigerating compartment discharge ports 111A. Since the cool air is blown out toward the heat insulating door 114, it cools down inside the heat insulating door 114 before being evenly circulated in the refrigerating chamber 111. In addition, the wind velocity inside the heat insulating door 114 increases, and there is a concern about heat leakage, and the cooling efficiency of the refrigerating chamber 111 generally decreases.

The present invention has been made to solve the above-mentioned conventional technical problems, and an object of the present invention is to provide a refrigerator capable of expanding the effective volume of a refrigerating chamber and cooling it uniformly and efficiently. To do.

[0014]

A refrigerator 1 according to a first aspect of the present invention comprises a freezing chamber 13 and a refrigerating chamber 11 above the freezing chamber 13 by partitioning the inside of a heat insulating box 6 with partition walls 8 and 9. A refrigerator 1 in which cold air cooled by a cooler 23 provided in a freezing compartment 13 is distributed and supplied into a refrigerating compartment 11 by a blower 24, and is formed vertically at both left and right corners of a rear surface of the refrigerating compartment 11. Back room duct 2
8 and 28, a plurality of outlets 11A formed in the refrigerating compartment rear ducts 28 and 28, and left and right outlets 29 connected to the lower ends of both refrigerating compartment rear ducts 28 and 28, respectively.
And a shunt duct 29 having an inlet 29B formed between them in the lower part, and supplying cool air from the blower 24 from the inlet 29B into the shunt duct 29 and a rear duct of the refrigerating compartment 28, 28 discharge ports 11A
The cold air is discharged toward the central portion of the refrigerating chamber 11 in the horizontal direction.

A refrigerator 1 according to a second aspect of the present invention is the refrigerator 1 according to the first aspect, wherein a low temperature corner 30 is formed in the refrigerating compartment 11.
It is provided with a discharge port 30A which is formed in the middle of the diversion duct 29 and supplies cold air to the low temperature corner 30.

According to a third aspect of the present invention, in the refrigerator 1 according to the first aspect or the second aspect, the refrigerating compartment rear duct 28 has a substantially triangular cross-section whose surface on the refrigerating compartment 11 side has an inclined side 28A, and a discharge port. 11A is formed on the inclined side 28A,
The left and right outlets 29A, 29A of the diversion duct 29 are of a funnel type whose opening gradually expands upward and has a substantially triangular shape.

[0017]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a refrigerator 1 of the present invention (excluding a door. Partially see through), FIG. 2 is a vertical side view of the refrigerator 1, and FIG. 3 is a perspective view of a refrigerating room rear duct 28. 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. It is divided into three upper and lower chambers by the lower partition wall 9, the upper compartment wall 8 is above the refrigerating compartment 11, and the lower compartment wall 9 is below the vegetable compartment 1
2. The freezing room 13 is defined between them.

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 have the same top opening container 1 as described above.
Pull-out type heat-insulating door 1 with 5A, 16A, 17A
Reference numerals 5 and 16 (the freezing chamber 13 has two upper and lower stages) and 17 are openably and closably closed.

A cooling chamber 22 is defined by a partition plate 21 in the deep part of the freezing chamber 13, and a cooling device 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 at the rear portion in the upper partition wall 8 is made of, for example, styrofoam or the like, and a guide duct 26 is provided in the molded heat insulating material 7 so as to vertically pass therethrough. A shunt duct 29 as shown in FIG. 3 is provided above the guide duct 26. The shunt duct 29 has a cold air inlet 29B at the lower end, and the inlet 29B is joined to the upper end of the guide duct 26. At the same time, the upper part is branched left and right. The diversion duct 29 branched to the left side is formed so as to bypass the blower 24, and an outlet 29A is provided at the tip thereof, and the outlet 29A is located at the lower end of the left rear refrigerating compartment duct 28 described later.

An outlet is also provided at the tip of the diversion duct 29 branched to the right side (not shown, symmetrical with the outlet 29A).
Is provided, and this outlet is located at the lower end of the left refrigerating compartment rear duct 28 which will be described later. The diversion duct 29
The outlet 29A is formed in a funnel shape in which the opening has a substantially triangular shape while gradually expanding upward as shown in FIG. The outlet 29A of the diversion duct 29 is configured so as to be substantially in close contact with a lower inlet 28B of the refrigerating compartment rear duct 28, which will be described later.

An ice temperature corner 30 as a low temperature corner is formed in the lower part of the refrigerating compartment 11, and the diversion duct 29 is located behind the ice temperature corner 30. Discharge ports 30A and 30A are provided in the middle of the part after the flow is divided into the left and right sides of the diversion duct 29, and the discharge ports 30A and 30A are opened in the ice temperature corner 30. And ice temperature corner 3
The inside of 0 is connected.

On the other hand, the left and right corners of the rear surface of the refrigerating compartment 11 are respectively provided with refrigerating compartment rear ducts 28, 28 extending vertically. The refrigerating compartment rear ducts 28, 28 have a substantially triangular cross section, and the outer side faces the inner box 3 side faces.
The rear surface is attached so as to be in contact with the back surface of the inner box 3, and the front surface has inclined sides 28A, 28A.

Further, a plurality of refrigerating compartment outlets 11A ... Are provided vertically at predetermined intervals on the inclined sides 28A, 28A of the refrigerating compartment rear ducts 28, 28, respectively. The refrigerating compartment discharge ports 11A ... Are oriented toward the central portion of the refrigerating compartment 11 in the horizontal direction.

Here, the pressure of the cool air flowing into the refrigerating chamber rear ducts 28, 28 has a larger loss from the inlet side to the tip. Therefore, the rear duct 2 of the refrigerator compartment
A plurality of refrigerating compartment outlets 11A provided in 8, 28 ...
Has a small size on the inlet 28B side (downward) and a large size on the opposite side (upper), which cools the inside of the refrigerating compartment 11 by the cool air discharged from the refrigerating compartment outlet 11A on the inlet 28B side and the tip. Is being made uniform. Incidentally, 31 is a damper device.

A vegetable compartment 12 is provided in the lower part of the refrigerator compartment 11.
A cold air inlet 41 to the vegetable compartment 12 is formed in the vegetable compartment 12.
Are communicated with each other through a vegetable compartment duct 42 that descends inside the heat insulating material 4.

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 with the lower portion of the cooling chamber 22.

With the above construction, the compressor 23 and the blower 24 (not shown) constituting 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, a part of the cool air blown out from the blower 24 flows into the guide duct 26, passes through the damper device 31 and flows into the flow dividing duct 29, and is divided into right and left. Then, a part of the cool air after the diverting flows into the ice temperature corner 30 through the discharge ports 30A, 30A provided in the middle of the diverting duct 29, and cools the inside of the ice temperature corner 30 strongly. Since a relatively large amount of cold air is supplied to the narrow area in the ice temperature corner 30, it is cooled to a low temperature of, for example, 0 ° C. to −1 ° C.

Then, the remaining cool air flows from the outlet 29A of the diversion duct 29 into the refrigerating compartment rear ducts 28, 28 provided vertically at both left and right corners of the rear surface of the refrigerating compartment 11, and the refrigerating compartment rear duct 28, 28 rises and is blown into the refrigerating compartment 11 through the respective refrigerating compartment discharge ports 11A.

In this case, the refrigerating compartment rear ducts 28, 28 have their outlets 11A for the refrigerating compartment formed toward the central portion of the refrigerating compartment 11 in the horizontal direction, and the cool air in the horizontal direction of the refrigerating compartment 11. It is discharged toward the central part. Further, since the refrigerating compartment discharge port 11A in the vicinity of the inlet 28B of the refrigerating compartment rear duct 28 is formed small and the upper part is formed large, the refrigerating compartment discharge port 11A in the upper part and the lower refrigerating room in the refrigerating compartment 11 are formed. Cooling in the refrigerating chamber 11 can be uniformly performed by the cool air discharged from the discharge port 11A.

The motor (not shown) of the damper device 31 is
It is controlled by a controller (not shown) having a sensor for detecting the temperature in the refrigerating compartment 11, and a damper (not shown) is rotationally driven to adjust the amount of cold air flowing in the case (guide duct 26). As a result, the rear duct 28 of the refrigerator compartment
The supply of cold air to the refrigerator is controlled, and the temperature in the refrigerating compartment 11 is maintained at a predetermined refrigerating temperature (for example, about + 3 ° 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. The cold air in the ice temperature corner 30 also flows into the vegetable compartment duct 42 from a cold air inlet (not shown) provided at the rear of the low temperature corner 30 and is discharged into the vegetable compartment 12. Then, after circulating inside the vegetable compartment 12 and indirectly cooling the interior of the container 17A, the cool air returns to the lower portion inside the cooling compartment 22 through the vegetable compartment return duct 43 formed in the lower partition wall 9. This prevents the vegetables in the container from drying at + 5 ° C.
It is kept at a temperature of about + 6 ° C.

As described above, since the refrigerating compartment rear duct 28 has a substantially triangular cross-section with the inclined side 28A on the refrigerating compartment 11 side, the rear left and right corners of the refrigerating compartment 11 can be effectively utilized. it can. Also, the rear ducts 28, 28 of the refrigerator compartment
Since the refrigerating compartment discharge ports 11A are formed toward the central portion of the refrigerating compartment 11 in the horizontal direction, the cool air is ejected from the left and right rear corners of the refrigerating compartment 11 toward the central portion in the horizontal direction. It This makes it possible to circulate the cool air uniformly throughout the refrigerating chamber 11 and suppress the increase in the wind speed inside the heat insulating door 14 so that the heat leak is reduced and the cooling efficiency is generally improved.

The left and right outlets 29A of the diversion duct 29 are also provided.
Has a funnel shape in which the opening gradually expands upward and has a substantially triangular shape, so that the cold air can smoothly flow from the diversion duct 29 to the rear ducts 28, 28 of both refrigerating compartments. By further reducing the pressure loss in the duct, the cooling efficiency can be further improved.

Further, since it has a discharge port formed in the middle of the flow dividing duct 29 to supply cold air to the ice temperature corner 30, the pressure loss of the cold air supplied to the ice temperature corner 30 is reduced, and the ice temperature is reduced. The corner 30 can be cooled more strongly.

[0037]

As described above in detail, according to the present invention, a refrigerating compartment rear duct formed vertically above and below both left and right corners of the refrigerating compartment formed above the freezing compartment, and this refrigerating compartment rear duct. Has a plurality of discharge ports formed in, and left and right outlets respectively connected to the lower ends of the rear ducts of both refrigerating compartments,
It is equipped with a diversion duct having an inlet formed between them in the lower part, and supplies cool air from the blower into the diversion duct from the inlet, and from the discharge ports of the refrigerating chamber rear duct to the horizontal center of the refrigerating chamber. Since the cool air is discharged toward the portion, the dimension in the depth direction of the refrigerating compartment can be expanded and the effective volume in the refrigerating compartment can be increased.

In particular, since the cool air is discharged from the left and right corners of the rear surface of the refrigerating chamber toward the central portion in the horizontal direction, the cool air can be circulated uniformly in the refrigerating chamber and the cooling capacity and the cooling efficiency can be improved. It is possible to realize energy saving by.

According to the invention of claim 2, in addition to the above, a low temperature corner formed in the refrigerating chamber and a discharge port formed in the middle of the diversion duct to supply cold air to the low temperature corner are provided. The pressure loss of the cold air supplied to the low temperature corner is reduced, and the low temperature corner can be cooled more strongly.

According to the invention of claim 3, in addition to the above-mentioned inventions, the rear duct of the refrigerating chamber has a substantially triangular cross-section whose surface on the refrigerating chamber side is an inclined side, and the discharge port is formed on the inclined side. Therefore, it is possible to effectively utilize the rear left and right corners of the refrigerating compartment and to expand the effective volume of the refrigerating compartment while suppressing the pressure loss in the rear duct of the refrigerating compartment.

In particular, the left and right outlets of the diversion duct are of a funnel type whose opening gradually expands upward and has a substantially triangular shape, so that the cold air flows from the diversion duct into the rear ducts of both refrigerating compartments. Also becomes extremely smooth, the pressure loss in the duct can be further reduced, and the cooling efficiency can be further improved.

[Brief description of drawings]

FIG. 1 is a partially transparent front view of a refrigerator according to the present invention.

FIG. 2 is a vertical side view of the refrigerator of the present invention.

FIG. 3 is a perspective view of a refrigerating compartment rear duct and a diversion duct.

FIG. 4 is an enlarged perspective view of a connecting portion between a refrigerating compartment rear duct and a diversion duct.

FIG. 5 is a partially transparent plan view of a conventional refrigerator.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator 4 Heat insulating material 6 Heat insulating box body 7 Formed heat insulating material 8 Upper partition wall 9 Lower partition wall 11 Refrigerating room 11A Refrigerating room discharge port 12 Vegetable room 13 Freezer room 21 Partition plate 23 Cooler 24 Blower 28 Cold room rear duct 28A Inclined side 29 Dividing duct 29A Outlet 29B Inlet 30 Ice temperature corner (low temperature corner) 30A Discharge port

Claims (3)

[Claims] 1. A freezing room and a refrigerating room above the freezing room are configured by partitioning the inside of the heat-insulating box with partition walls.
In a refrigerator in which cold air cooled by a cooler provided in the freezer compartment is distributed and supplied into the refrigerating compartment by a blower, a refrigerating compartment rear duct formed vertically in both left and right rear corners of the refrigerating compartment, A plurality of outlets formed in the rear ducts of the refrigerating compartments and left and right outlets respectively connected to the lower ends of the rear ducts of the refrigerating compartments, and an inlet formed between them in the lower portion. The cooling air from the blower is supplied into the diversion duct from the inlet, and the cooling air is discharged from each outlet of the refrigerating compartment rear duct toward the central portion in the horizontal direction of the refrigerating compartment. A refrigerator characterized by being. 2. A low temperature corner formed in the refrigerating compartment,
The refrigerator according to claim 1, further comprising: a discharge port formed in the middle of the diversion duct to supply cold air to the low-temperature corner. 3. The refrigerating compartment rear duct has a substantially triangular cross-section with the refrigerating compartment side surface being an inclined side, the discharge port is formed on the inclined side, and the left and right outlets of the diversion duct are upwards. 3. The funnel shape in which the opening gradually expands to form a substantially triangular shape.
Refrigerator.