JPH07253268A - Freezer and refrigerator - Google Patents

Abstract

PURPOSE:To cause a temperature distribution within a refrigerator to be always stable by a method wherein a cold air supplying duct of a refrigerator chamber is divided into a going passage for ascending cold air and a return passage for reversing and descending the ascended cold air and a blowing hole for use in supplying cold air into the refrigerator chamber is arranged at the upper-most part acting as a final position of the going passage. CONSTITUTION:Cold air supplied from a pressure chamber 7 to a refrigerator chamber 2 is fed into a cold air supplying duct 13. The cold air fed into the cold air supplying duct 13 passes within a going passage and ascends up to the upper-most part of the refrigerator chamber 2, a part of the cold air is supplied from a blowing port 13c into the refrigerator chamber 2, the remaining cold air is supplied from the blowing port 13d into each of shelves within the refrigerator chamber 2 when the cold air descends. The cold air circulates within the refrigerator chamber 2, then the cold air passes through a cold air return duct 11 and is fed into a vegetable chamber 4. The cold air fed into the vegetable chamber 4 circulates within the vegetable chamber 4, thereafter the cold air passes through the cold air duct 12 and returns back to th lower part of an evaporator 5. In this way, the cold air is circulated within the refrigerator. With such an arrangement as above, it is always possible to make a stable temperature distribution within the refrigerator chamber 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in the structure of a cold air supply duct in a refrigerating compartment of a refrigerator / freezer.

[0002]

2. Description of the Related Art In recent years, freezer-type refrigerators of a type in which a refrigerating room is provided at a height where it can be easily taken in and out are becoming mainstream in terms of frequency of use.

A conventional refrigerator-freezer is disclosed in Japanese Patent Laid-Open No. 5-52.
There is one disclosed in Japanese Patent Publication No. 460.

An example of the above-mentioned conventional refrigerator-freezer will be described below with reference to the drawings.

In FIGS. 4, 5 and 6, reference numeral 1 is a freezer-refrigerator, three constant temperature rooms are provided, and the upper stage is a refrigerating room 2,
The middle section is the freezer compartment 3, and the lower section is the vegetable compartment 4. At the rear part of the freezing chamber 3, a cool air supply device including an evaporator 5, a cool air circulation fan motor 6 and a pressure chamber 7 is provided. A partition plate 8d is provided at the rear of the refrigerating chamber to form a cool air supply duct 8. A control damper 9 for the refrigerating chamber 2 is provided below the cold air supply duct 8 to adjust the amount of cold air introduced into the cold air supply duct 8.

The cold air supply duct 8 has a forward path 8a for raising the introduced cold air and a return path 8b for reversing and descending the raised cold air. The return path 8b has a plurality of blow holes 8c on the surface facing inward of the refrigerating chamber 2. It is provided. Cold air is supplied into the refrigerating chamber 2 through the blowing holes 8c. In addition, the cold air return duct 1 is provided at the bottom, side, and ceiling of the vegetable compartment of the freezer compartment 3, respectively.
0, 11, and 12 are provided.

The cool air cooled by the evaporator 5 is sucked up by the rotation of the cool air circulation fan motor 6, and the pressure rises to be introduced into the pressure chamber 7. The cold air introduced into the pressure chamber 7 is distributed between the freezing compartment side and the refrigerating compartment side due to the difference in circuit resistance between the freezing compartment side cold air circuit and the refrigerating compartment side cold air circuit.

The cold air supplied from the pressure chamber 7 to the freezing chamber side circulates in the freezing chamber 3 and then returns to the cold air return duct 10 to return to the lower portion of the evaporator 5.

On the other hand, the cold air supplied from the pressure chamber 7 to the refrigerating compartment side is introduced into the cold air supply duct 8 through the damper 9 at the rear part of the refrigerating compartment 2. The cold air introduced into the cold air supply duct 8 rises in the outward path 8a, rises to the uppermost portion of the refrigerating chamber 2, and descends in the return path 8b. At that time, the cold air is returned to the return path 8b.
It is supplied to each shelf in the refrigerating room 2 through a blow-out hole 8c provided in the middle of. After circulating in the refrigerator compartment 2, the cool air is returned to the cold air return duct 11 and introduced into the vegetable compartment 4.

The cold air introduced into the vegetable compartment 4 circulates in the vegetable compartment 4 and then returns to the cool air return duct 12 to return to the lower portion of the evaporator 5.

The cold air thus returned to the lower portion of the evaporator 5 is repeatedly cooled and circulated in the refrigerator to keep each temperature-controlled room at a predetermined temperature.

At this time, the temperature of the freezing chamber, to which the cold air introduced into the pressure chamber 7 is directly supplied, becomes the lowest, and the temperature of the vegetable chamber 4 to which the cold air after circulating the refrigerating chamber 2 is supplied is slightly higher than that of the refrigerating chamber 2. Becomes higher.

[0013]

However, in the above-mentioned structure, since the plurality of blow-out holes 8c are provided only in the return path in the cold air supply duct 8, the direction of the cold air blown out is downward, and the cold air is further cooled. There is a problem that the temperature distribution in the refrigerating compartment is poor because the front side of the refrigerating compartment and the upper part of the refrigerating compartment door shelf are lacking momentum, and the lower refrigerating compartment is excessively cold air.

An object of the present invention is to supply a refrigerator-freezer in which the temperature distribution in the refrigerator compartment is always stable.

[0015]

In order to solve the above-mentioned drawbacks, the refrigerator / freezer of the present invention comprises a refrigerating room and a constant temperature room for the freezing room.
In a freezer-refrigerator that has more than one room and is equipped with a cold air supply device at the rear of the freezing room and has the refrigerating room at the uppermost stage, the cold air supply duct of the refrigerating room is used as a forward path for rising cold air and a return path for reversing and descending the rising cold air. It is characterized in that a blowout hole for dividing the air into the refrigerating chamber is provided at the uppermost position which is the final position of the outward path.

[0016]

According to the present invention, the cold air supplied from the cold air supply device including the evaporator, the cool air circulation fan motor and the pressure chamber is distributed to the refrigerating compartment side and the freezing compartment side.
The cold air introduced into the cold air supply duct of the refrigerating room was provided with a blowout hole at the top, which is the final position of the outward path. The temperature distribution in the refrigerating compartment is stable because the lower part of the refrigerating compartment is not overheated with cold air.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A freezer-refrigerator according to an embodiment of the present invention will be described below with reference to the drawings. It should be noted that the same configurations as those of the conventional one are denoted by the same reference numerals and detailed description thereof will be omitted.

1, 2 and 3 show a freezer-refrigerator according to an embodiment of the present invention. In the drawings, 1 is a refrigerator-freezer, 3 constant temperature rooms are provided, and an upper stage is a refrigerating room 2. , The interruption is the freezer compartment 3, and the lower part is the vegetable compartment 4. An evaporator 5 and a fan motor 6 for cold air circulation are provided at the rear of the freezer compartment 3.
A cold air supply device including a pressure chamber 7 and a pressure chamber 7 is provided.

A partition plate 13e is provided at the rear part of the refrigerating chamber and a cold air supply duct 13 is provided. Cold air supply duct 1
A control damper 9 for the refrigerating compartment 2 is provided at the lower part of 3 to adjust the amount of cold air introduced into the cold air supply duct 13. The cold air supply duct 13 has a forward path 13a for rising the introduced cold air and a return path 13b for reversing and descending the rising cold air, and a plurality of inner surfaces facing the refrigerating chamber 2 are provided at the uppermost position which is the final position of the forward path 13a. A blowout hole 13c is provided.

The return path 13b is provided with a plurality of blowing holes 13d on the surface facing the refrigerating chamber 2. Cold air is supplied into the refrigerating chamber 2 through the blowing holes 13c and 13d.
Further, cold air return ducts 10, 11 and 12 are provided at the bottom portion, the side portion and the vegetable room ceiling portion of the freezing compartment 3, respectively.

The cold air cooled by the evaporator 5 is sucked up by the rotation of the fan motor 6 for circulating cold air, the pressure rises and is introduced into the pressure chamber 7. The cold air introduced into the pressure chamber 7 is distributed between the freezing compartment side and the refrigerating compartment side due to the difference in circuit resistance between the freezing compartment side cold air circuit and the refrigerating compartment side cold air circuit.

The cold air supplied from the pressure chamber 7 to the freezing chamber side circulates in the freezing chamber 3 and then returns to the cold air return duct 10 to return to the lower portion of the evaporator 5.

On the other hand, the cold air supplied from the pressure chamber 7 to the refrigerating compartment side is introduced into the cold air supply duct 13 through the damper 9 at the rear part of the refrigerating compartment 2. The cold air introduced into the cold air supply duct 13 rises in the outward path 13a, rises to the uppermost part of the refrigerating compartment 2, a part of which is supplied into the refrigerating compartment 2 from the blowout hole 13c, and the rest descends in the return path 13b. At that time, it is supplied to each shelf in the refrigerating room 2 through the blowout hole 13d. After circulating in the refrigerator compartment 2, the cool air is returned to the cold air return duct 11 and introduced into the vegetable compartment 4.

The cold air introduced into the vegetable compartment 4 circulates in the vegetable compartment 4 and then returns to the cool air return duct 12 to return to the lower portion of the evaporator 5.

The cold air thus returned to the lower portion of the evaporator 5 is repeatedly cooled and circulated in the refrigerator to keep each temperature-controlled room at a predetermined temperature.

At this time, the freezing chamber to which the cold air introduced into the pressure chamber 7 is directly supplied has the lowest temperature, and the vegetable chamber 4 to which the cold air after circulating the refrigerating chamber 2 is supplied has a temperature slightly higher than that of the refrigerating chamber 2. Becomes higher.

[0027]

INDUSTRIAL APPLICABILITY As described above, the present invention provides a refrigerating refrigerator having two or more constant temperature chambers of a refrigerating room and a freezing room, a cold air supply device provided at the rear part of the freezing room, and a refrigerating room provided at the uppermost stage. The cold air supply duct in the refrigerating room was divided into the outward path for rising cold air and the returning path for rising cold air to reverse and descend, and a blow-out hole for supplying cold air into the refrigerating room was provided at the top, which is the final position of the outgoing path, so A certain amount of cold air is supplied to the refrigerating chamber, and the temperature distribution in the refrigerating chamber is stable without the amount of cold air being too small at the upper part of the refrigerating chamber and the upper part of the refrigerating chamber door shelf and being too low at the lower part of the refrigerating chamber.

[Brief description of drawings]

FIG. 1 is a sectional view of a refrigerator-freezer according to an embodiment of the present invention.

FIG. 2 is a front view showing a partition plate of a cold air supply duct which is an embodiment of the present invention.

FIG. 3 is a front view of a cold air supply duct according to an embodiment of the present invention.

FIG. 4 is a sectional view of a conventional refrigerator-freezer.

FIG. 5 is a front view showing a partition plate of a conventional cold air supply duct.

FIG. 6 is a front view of a conventional cold air supply duct.

[Explanation of symbols]

 1 Refrigerator / Refrigerator 2 Refrigerator 3 Refrigerator 4 Vegetable room 13 Cold air supply duct 13a Forward 13b Return 13c, 13d Blow-out hole 13e Partition plate

Claims (1)

[Claims] 1. In a refrigerating refrigerator having two or more constant temperature chambers of a refrigerating room and a freezing room, a cold air supply device provided at the rear part of the freezing room, and a refrigerating room having the refrigerating room at the uppermost stage, the cold air supply duct of the refrigerating room is cooled. A refrigerating / refrigerating machine characterized by being divided into a forward path in which the cold air rises and a return path in which the raised cold air is reversed and descended, and a blowing hole for supplying the cold air into the refrigerating chamber is provided at the uppermost position which is the final position of the forward path.