JP2002228327A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator in which the passage of a cooler is prevented from being contracted or choked by frosting the cooler uniformly. SOLUTION: In the refrigerator arranged such that chill sucked from the air inlet of a freezing compartment is cooled by a cooler and supplied from an air outlet, a cooler front plate for partitioning a cooling compartment into the cooler side and the baffle plate side is disposed in front of the cooler. The cooler front plate is provided with a lower opening facing the lower end part of the cooler, and an upper opening facing a front part above the lower end part of the cooler. Since a bypath for introducing chill from the lower opening to the upper opening is formed between the baffle plate and the cooler front plate, a plurality of passages for introducing chill to the cooler are ensured and entire surface of the cooler is frosted uniformly because chill approaches the cooler uniformly. Consequently, chill flow to the cooler is not disturbed nor stopped by local frost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator having a cooling room formed at the rear of a freezing room.

[0002]

2. Description of the Related Art A refrigerator in which a heat insulating box is partitioned into a freezer compartment and a refrigerator compartment by a partition is disclosed, for example, in Japanese Patent Application Laid-Open No. Hei 5-1877.
No. 61 is disclosed.

[0003] Regarding the same kind of refrigerator,
This will be described with reference to FIG. Reference numeral 51 denotes a refrigerator, which forms an upper freezing compartment 54 and a lower refrigerating compartment 55 by partitioning a heat insulating box 52 with a partition 53. 56 is a cooling room, 57
Is a vertically long cooler placed in this cooling room,
58 is a blower for circulating cool air disposed above the cooler, 59 is an outlet formed on the back of the freezer, and 60 is a suction port formed on the bottom of the freezer.

In the refrigerator 51 configured as described above, the cool air is blown out from the suction port 59 to cool the freezing chamber 54, and then is sucked from the suction port 60 formed on the front side of the freezing chamber 54. And the cool air flows into the cooler 57 from the front side of the cooler 57.

[0005]

In the above-described refrigerator 51 shown in FIG. 4, the cool air flowing into the cooler 57 is concentrated only on the front side of the cooler 57 because the cool air flows only from the front side. There was a risk of frost formation and narrowing or blocking the passage of cold air in a short time. In order to solve this problem, the defrosting operation must be performed frequently, which requires a large amount of energy required for the defrosting operation, and may cause a problem that the temperature of the freezing compartment 54 cannot be kept constant.

SUMMARY OF THE INVENTION The present invention provides a refrigerator in which the frost formation of the cooler is equalized and the passage of the cool air is hardly narrowed or blocked.

[0007]

According to the present invention, a cooling plate is formed by disposing a partition plate at a rear portion of a freezing room, and a cooler and a blower for circulating cool air are disposed in the cooling room. Cooling the cool air sucked from the suction port formed in the chamber with the cooler,
In a refrigerator configured to blow out from an outlet formed in the freezing room, a cooler front plate that partitions the cooling room into the cooler side and the partition plate side is arranged in front of the cooler, The cooler front plate has a lower opening facing the lower end of the cooler and an upper opening facing the front above the lower end of the cooler. And a cool air bypass passage for guiding the cooling air is formed between the partition plate and the cooler front plate.

The heat insulating box is partitioned into a freezing compartment and a refrigerating compartment by a partition, and a partition plate is arranged at the rear of the freezing compartment to form a cooling compartment. The cooling compartment has a cooler and a blower for circulating cool air. In the refrigerator configured to cool the cool air sucked from the suction port formed in the freezing room by the cooler and to blow out the air from the air outlet formed in the freezing room, It is composed of a horizontal part where the part is formed horizontally, and an inclined part formed by inclining the rear part downward,
A cooler that arranges the cooler in a space between the inclined portion and the back plate of the heat-insulating box, and that partitions the cooling chamber into the cooler side and the partition plate side in front of the cooler. A front plate is arranged, and a lower opening facing the lower end of the cooler and an upper opening facing the front portion above the lower end of the cooler are formed in the cooler front plate, A cool air bypass passage for guiding cool air before opening to the upper opening is formed between the partition plate and the cooler front plate.

[0009] Further, a wide portion is formed by widening the cooling chamber at a lower portion of a rear portion of the cooler, and cool air can be introduced into the cooler from the wide portion.

[0010] A partition plate for partitioning the heat insulating box to form a cooling chamber, a cooler disposed in the cooling chamber, and a blower for cooling air with the cooler and circulating through the heat insulating box. A cooler front plate covering the partition plate side of the cooler, an opening provided in the cooler front plate, and formed between the partition plate and the cooler front plate, below the cooler. And a cool air bypass passage for guiding the air to the opening.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 show a refrigerator according to an embodiment of the present invention.

FIG. 1 is a sectional view showing a state in which a refrigerator door and a compressor are removed. A refrigerator 1 shown in this figure is a refrigerator, in which an insulated box 2 is partitioned by a partition 3 to form an upper freezing room (for example, a storage room controlled at about -20 ° C) 4 and a lower refrigeration room (for example, about 3 ° C). Controlled storage room) 5. Reference numeral 6 denotes a cooling chamber, which is formed in the rear part of the freezing chamber 4 to be vertically long when viewed from the side. 7 is a vertically long cooler disposed in the cooling chamber 6 when viewed from the side, 8 is a blower for cooling air circulation disposed above the cooler, 8A is a fan of the blower,
Reference numeral 9 denotes an outlet formed in the upper part of the partition plate of the freezer compartment 5, 10 denotes a suction port formed in the front part of the bottom surface, and 11 denotes a suction port formed in the lower part of the partition plate. The lower end of the cooler 7 is provided with a partition 3
Are arranged lower than the upper end of the. That is, the depth dimension of the cooler is formed relatively small so that the depth dimension of the refrigerator is not increased, and the height dimension is reduced.

In FIG. 2, reference numeral 12 denotes a partition member for separating the suction side and the discharge side of the cooler 7, and 13 denotes a front plate of the cooler.
The cool air flowing through the cooler 7 is disposed between the suction side of the cooler 7 and the partition plate 51 to secure a plurality of paths such as the cool air bypass path 50.

Reference numeral 14 denotes an upper opening formed in the front plate 13 of the cooler for guiding cool air to the front side of the cooler 7.
Reference numeral 15 also denotes a lower opening formed in the cooler front plate 13 for guiding cool air to the lower side and the rear side of the cooler 7. Reference numeral 16 denotes a communication passage formed in the partition 3, and
The communication path 16
Is configured to be able to be introduced into the lower side and the rear side of the cooler 7.

The cooler (evaporator) 7 includes a compressor (not shown), a condenser (not shown), and a pressure reducing device (not shown).
Are connected annularly by a refrigerant pipe to form a refrigerant circuit. This refrigerant circuit is filled with R134a,
Used as a refrigerant.

The reference numeral 21 designates the depth of the cooling chamber
The lower part is a wide part formed wide at the lower part, and the wide part is formed, so that the cool air from the freezer compartment 4 easily flows to the rear side of the lower part of the cooler 7.

Reference numeral 22 denotes a drain pan for receiving a drain from a cooler, 23 a drain hose for guiding the drain received by the drain pan to a lower evaporating dish, and 24 a defrost heater.

In the refrigerator 1 constructed as described above, the cool air sucked from the openings 14 and 15 during the operation thereof is cooled by the cooler 7.
, And is cooled from the outlet 9 to cool a frozen object such as frozen food in the freezer compartment 4.

The flow of the cool air will be described in detail. The cool air blown out from the outlet 9 flows into two paths, that is, the inlet 11 of the partition plate and the inlet 10 at the front of the bottom surface.
The flow of the cool air in the inside of the freezer compartment 4 is more efficient than the conventional one (see FIG. 4). , Can be cooled substantially evenly.

Then, the cool air sucked from the suction port 11 flows from the front of the cooler 7 through the opening 14, and the cool air sucked from the suction port 10 passes through the communication passage 16 to the opening 1.
At least three paths (a path (a) flowing into the cooler from the front side, a path (b) flowing into the cooler from the lower side, and cooling from the rear side) so as to flow into the cooler 7 from the lower side and the rear side from 5 From the path (c) flowing into the vessel], and flows into the cooler 7 almost uniformly.

That is, the cool air passing through the cooling chamber 16 flows into the cooler 7 from the rear side of the cooler 7 as shown in the above-mentioned path (c) because the wide portion 21 is formed. From the front side, from the lower side, and from the rear side, it flows into the cooler 7 almost uniformly from the entire lower periphery of the cooler. For this reason, even if the cold air flowing through the cooler 7 contains a large amount of water and frost forms on the surface of the cooler 7, the frost forms substantially uniformly on the entire lower portion of the cooler 7. Become.

Therefore, according to this refrigerator, it is possible to prevent the flow of the cool air flowing into the cooler 7 due to the local frost formation or the stop of the flow of the cool air. Thereby, the interval between the defrosting time and the next defrosting time can be extended to improve the cooling efficiency. Moreover,
In the case of local frost, although long time is required for the defrosting time, in the case of the present invention, since the entire lower part of the cooler 7 is thinly frosted, the defrosting time can be relatively short, and The energization time to the defrost heater can be shortened, and the temperature change in the freezer compartment can be suppressed to a small value.

Further, the communication passage 16 is formed in the partition 3 and
Since the height of the communication passage 16 is not required, the flow of cool air to the cooler 7 can be made substantially uniform without increasing the height of the refrigerator.

Further, in this embodiment, an example is shown in which the freezing compartment is formed above and the refrigerating compartment is formed below.
The present invention may be applied to a device having a freezer compartment below, a device having only a freezer compartment, or a device having only a refrigerator compartment.

[0025]

According to the first aspect of the present invention, the cool air bypass passage for guiding the cool air in the lower opening to the upper opening is formed between the partition plate and the cooler front plate. Can be introduced from the lower opening to the lower end of the cooler, and can also be introduced from the upper opening to the front of the cooler through the cool air bypass path. Since the cold air flowing into the cooler approaches evenly, even if frost forms on the surface of the cooler, the frost becomes evenly close to the entire cooler, and the cold air that forms local frost and flows into the cooler Obstructing the flow of air or stopping the flow of cold air can be prevented.

According to the second aspect of the present invention, the refrigerator is arranged in the space between the inclined portion of the partition and the back plate of the heat insulating box, so that it is difficult to devise the flow of cool air. Since the cool air flowing into the cooler has multiple routes for introducing the cool air to the cooler, the cool air flows closer to the cooler evenly, so even if frost forms on the surface of the cooler, the frost is spread evenly on the entire cooler. , And it is possible to prevent the flow of cool air flowing to the cooler due to local frost formation or the stop of the flow of cool air.

According to the third aspect of the present invention, since the rear part of the cooler in the cooling chamber forms a wide part having a widened lower part, the cool air is also supplied from the wide part to the cooler. It can be introduced, and the cool air introduced into the cooler can be made more uniform, and local frost formation can be prevented.

Further, according to the fourth aspect of the present invention, there is provided a cool air bypass which guides the air below the cooler to the opening of the front plate of the cooler. Can be introduced at the front of the cooler, so that the air flowing into the cooler can be made nearly uniform by securing multiple air introduction routes to the cooler, so that frost may form on the surface of the cooler. In addition, the frosting becomes evenly close to the entire cooler, and it is possible to prevent the frost from locally blocking the flow of the cool air flowing to the cooler or stopping the flow of the cool air. .

[Brief description of the drawings]

FIG. 1 is a sectional view showing a state in which a door, a compressor, and the like are removed from a refrigerator of the present invention.

FIG. 2 is a sectional view showing a main part of the refrigerator.

FIG. 3 is a perspective view showing a cooler front plate and a fan of the refrigerator.

FIG. 4 is a cross-sectional view showing a main part of a conventional refrigerator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Insulated box 3 Partition 4 Freezer room 5 Refrigerator room 6 Cooling room 7 Cooler 9 Outlet 10 Suction port 11 Suction port 12 Partition member 13 Cooler front plate 14 Upper opening (opening) 15 Lower opening 21 Wide part 50 Cold air bypass 51 Partition plate

Claims (4)

[Claims] 1. A cooling chamber is formed by disposing a partition plate at a rear portion of a freezing chamber, and a cooler and a blower for circulating cool air are disposed in the cooling chamber, and suction is performed from a suction port formed in the freezing chamber. In a refrigerator configured to cool cold air with the cooler and blow out from an outlet formed in the freezing chamber, the cooling chamber is provided on the cooler side and the partition plate side in front of the cooler. A cooler front plate is arranged, and a lower opening facing the lower end of the cooler and an upper opening facing the front portion above the lower end of the cooler are formed in the cooler front plate. A refrigerator, wherein a cool air bypass for guiding cool air from the lower opening to the upper opening is formed between the partition plate and the cooler front plate. 2. A cooling chamber is formed by partitioning a heat insulating box into a freezing compartment and a refrigerating compartment, and a partition plate is disposed at the rear of the freezing compartment to form a cooling compartment, and a cooler and a blower for circulating cool air in the cooling compartment. In the refrigerator configured to cool the cool air sucked from the suction port formed in the freezing room by the cooler and to blow out the air from the air outlet formed in the freezing room, A horizontal portion in which the portion is formed horizontally, and an inclined portion formed by inclining the rear portion downward, and the cooler is arranged in a space between the inclined portion and the back plate of the heat insulating box. At the same time, a cooler front plate that partitions the cooling chamber into the cooler side and the partition plate side is disposed in front of the cooler, and the cooler front plate faces the lower end of the cooler. A lower opening and an upper opening facing a front portion above a lower end portion of the cooler; And a cool air bypass passage for guiding cool air before the lower opening to the upper opening is formed between the partition plate and the cooler front plate. 3. The cooling device according to claim 1, wherein a wide portion is formed by widening the cooling chamber at a lower portion of a rear portion of the cooler, and cool air can be introduced into the cooler from the wide portion. 3. The refrigerator according to 1 or 2. 4. A partition plate for partitioning a heat insulating box to form a cooling chamber, a cooler disposed in the cooling chamber, and a blower for cooling air by the cooler and circulating through the heat insulating box. A cooler front plate that covers the partition plate side of the cooler;
An opening provided in the front plate of the cooler, and a cool air bypass formed between the partition plate and the front plate of the cooler and guiding air below the cooler to the opening. Refrigerator.