JPH06249568A - Refrigerator - Google Patents

Abstract

PURPOSE:To provide a refrigerator in which immersion of water in a partition wall caused by defrosted water flowing from a dew receiving pan and a frosting at a cold air suction duct opening can be effectively prevented. CONSTITUTION:A cooler 38 is arranged above a deep side of a partitioned wall 7 for dividing a thermal insulated box 6 into an upper segment and a lower segment. A dew receiving pan 2 is arranged below the cooler 38. A glass tube heater 29 is installed between the dew receiving pan 2 and the cooler 38. A cold air suction duct 19 is arranged within the partitioned wall 7 and opened a lower position than that of the cooler 38. A main dew receiving pan 23 and a dew receiving plate 24 forming the dew receiving pan 2 are formed with extensions 27 and 33 advanced from an opening 19A of the cold air suction duct 19 along an inner surface of the duct 19.

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 cooler is disposed above a partition wall and a dew tray is provided below the cooler.

[0002]

2. Description of the Prior Art Conventional refrigerators of this type are, for example,
As disclosed in Japanese Patent No. 28381 (F25D21 / 14), partition walls divide a heat-insulating box into upper and lower parts, a freezer compartment is formed in the upper part, and a refrigerating compartment is formed in the lower part. The cooler that constitutes a part of is installed vertically. A dew tray is provided below the cooler, and is configured to receive defrosting water dropped when defrosting the cooler.

This dew tray is usually made of metal or hard synthetic resin and is formed in a container shape having an open upper surface, and is arranged on the upper surface of the inner part of the partition wall. A drain pipe is connected to the drain port of the dew tray. The structure is such that the defrosted water that is received is discharged to the outside. Further, the cold air suction duct from the freezer compartment and / or the refrigerating compartment is formed in the partition wall, and is opened at the side of the dew tray below the cooler that is the suction side of the cooler through the partition wall. .

[0004]

As described above, in this type of refrigerator, the defrosting water received by the dew tray when defrosting the cooler is provided because the cool air suction duct is open to the side surface of the dew tray. There is a risk that the cold air will flow out to the suction duct side, enter between the heat insulating material forming the partition wall and the dew tray, and the partition wall will be flooded. Therefore, a seal must be provided between the dew tray at the portion where the cold air suction duct is open and the heat insulating material of the partition wall, but conventionally, the heat insulating material of the partition wall is butted against the side surface of the dew tray as described in the above publication. Since this is the only structure, the work of sealing the abutting portion, that is, the opening portion of the cool air suction duct is extremely complicated.

Further, since cold air having a relatively high humidity returns from the cold air suction duct of the refrigerating compartment, frost is apt to occur at the opening thereof. Since there is a risk of blocking the duct when such frost grows, conventionally, a special heater for frost prevention is attached to the opening of the duct, which causes an increase in the number of parts and an increase in power consumption. Was becoming.

The present invention has been made in order to solve the conventional technical problems, and effectively prevents the defrosting water from the dew tray from flooding the partition wall and frosting in the cold air intake duct opening. The purpose is to provide a refrigerator that can.

[0007]

A refrigerator 1 according to the present invention includes a partition wall 7 for partitioning a heat insulating box 6 into upper and lower parts, a cooler 38 arranged above the inner part of the partition wall 7, and a cooling device 38. Bowl 38
Of the dew pan 2 arranged below the dew pan 2, the defrost heater (glass tube heater) 29 of the cooler 38 arranged between the dew pan 2 and the cooler 38, and arranged in the partition wall 7 for cooling. Bowl 3
8 is provided with a cold air suction duct 19 opened at a position lower than 8, and the dew tray 2 is formed with extension portions 27, 33 that enter along the inner surface of the duct 19 from the opening portion 19A of the cold air suction duct 19. It was done.

[0008]

According to the refrigerator 1 of the present invention, the extension portions 27 and 33 of the dew tray 2 enter the cold air suction duct 19 through the opening 19A along the inner surface of the cold air suction duct 19. 2 and the opening 19A of the cold air suction duct 19 are
The extension 27 of the dew tray 2 comes into surface contact. Therefore, the sealing property between the dew tray 2 and the partition wall 7 is improved, and the work of sealing the partition wall 7 and the dew tray 2 at the opening 19A of the cold air suction duct 19 is simplified.

Further, the heat of the defrosting heater (glass tube heater) 29 arranged between the dew tray 2 and the cooler 38 is transferred to the extension portion 33 when the cooler 38 is defrosted, so that the cooling is performed. At the same time as the defrosting of the container 38, the opening 19 of the cold air intake duct 19
The frost formed on A will also be melted and removed.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is an enlarged vertical side view of the dew tray 2 portion of the refrigerator 1 of the present invention, FIG. 2 is a front view of the refrigerator 1, FIG. 3 is a vertical side view of the refrigerator 1, and FIG. 4 is a dew tray 2 and partition wall heat insulating material 3. FIG. The refrigerator 1 has a heat insulating material 4 such as polyurethane foam.
The inside of the heat-insulating box body 6 that is filled with and is divided into upper and lower parts by the partition wall 7 constitutes the freezing compartment 8 above the partition wall 7 and the refrigerating compartment 9 below.
Further, the front opening of the refrigerating chamber 9 is openably and closably closed by rotary heat insulating doors 11 and 12 and a pull-out heat insulating door 13.

A partition wall heat insulating material 3 formed of expanded polystyrene or the like is housed in the partition wall 7. The heat insulating material 3
Is composed of a lower heat insulating material 3A and an upper heat insulating material 3B which are superposed on each other. On the upper surface of the lower heat insulating material 3A, a cold air suction port 14 of the refrigerating compartment 9 that opens to the top of the refrigerating compartment 9 at the front end, and two recessed grooves 16 and 16 extending rearward from the cold air suction inlet 14 A recess 17 for accommodating the dew tray, which communicates with the rear ends of the grooves 16 and 16, is formed across the left and right. On the left side of the bottom surface of the recess 17, the lower heat insulating material 3A is provided.
A through hole 21 penetrating through and opening to the lower surface of the partition wall 7 is provided, and the bottom surface of the recess 17 is inclined toward the through hole 21 from the left and right sides. Further, a cool air discharge duct 18 to the refrigerating chamber 9 is provided between the rear ends of the concave grooves 16, 16.

The upper heat insulating material 3B is superposed on the lower heat insulating material 3A at the front side of the recess 17, whereby the upper and lower heat insulating materials 3 are formed.
A cool air suction duct 19 of the refrigerating chamber 9 is formed in the concave grooves 16 and 16 between B and 3A, extending from the cool air suction port 14 to the recess 17 and opening therein. The bottom surface of the groove 16 continuous with the recess 17, that is, the bottom surface of the rear end opening 19A of the cool air suction duct 19 is inclined downward toward the recess 17 as shown in FIG.

The dew tray 2 is housed in the recess 17. The dew tray 2 is composed of a main dew tray 23 formed of a hard synthetic resin, and a heat-conductive aluminum dew receiving plate 24 superposed on the upper surface of the main dew tray 23. The main dew tray 23 is in the shape of a container that is open to the left and right and extends to the left and right, and a drain port 26 protruding downward is formed on the left side of the bottom surface of the main dew tray 23. It slopes low from left to right. The front wall of the main dew tray 23 extends forward at two places on the left and right to form extensions 27, 27. Each extension 27, 27
Is composed of a bottom wall 27A and left and right side walls 27B and 27B, respectively, which are open in the front and rear and in the upper direction, and the bottom wall 27A is inclined rearward and low.

The dew receiving plate 24 has a holding portion 28 for a glass tube heater 29 serving as a defrosting heater, and a base 31 which extends downward from the rear end of the holding portion 28 and is then lifted forward and upward.
The front wall of the base 31 is cut out at two places on the left and right, and the lower edges of the cutouts 32, 32 are bent forward to form short extensions 33, 33. Then, each of the extension portions 33, 33 is slanted rearwardly low, similarly to the bottom wall 27A. A drain port 34 is formed on the left side of the bottom surface of the base 31, and the bottom surface of the base 31 is inclined toward the drain port 34 from the left and right sides.

As shown in FIG. 1, the main dew tray 23 is housed in the recess 17 with the drainage port 26 inserted into the through hole 21, and is fixed to the lower heat insulating material 3A by an adhesive, and The plate 24 is closely attached to the inner surface of the main dew tray 23,
As a result, the dew tray 2 is assembled. At this time, the extension portions 27, 27 of the main dew tray 23 enter the cold air suction duct 19 through the rear end opening 19A of the cold air suction duct 19,
The bottom wall 27A and both side walls 27B, 27B are provided with the opening 19
It is closely attached along the bottom surface and the left and right side surfaces of A and is fixed to the lower heat insulating material 3A by an adhesive as in the other portions. In particular, the outer surfaces of the extension portions 27, 27 and the opening portion 19A of the cold air suction duct 19
Since it comes into surface contact with the inner surface, the sealing property between the two is improved, and the sealing work with an adhesive or the like is also simplified.

The extension portions 33, 33 of the dew receiving plate 24 also enter the extension portions 27, 27 of the main dew receiving tray 23 in the direction of the cold air suction duct 19 and come into close contact with the bottom wall 27A. As a result, the cold air suction duct 19 opens in the dew tray 2 at the opening 19A. Further, the drainage port 34 matches the drainage port 26 of the main dew tray 23, and the drainage port 26 projects below the partition wall 7 from the through hole 21 and is connected to the drainage hose 36.

A cooler 38 is vertically provided above the dew tray 2 above the partition wall 7 and the front side thereof is partitioned from the freezing compartment 8 by a back plate 39 of the freezing compartment 8. Further, with this arrangement, the glass tube heater 29 is located directly below the cooler 38. A blower 41 for circulating cold air is disposed above the cooler 38, and a cool air discharge port 42 of the freezer compartment 8 is formed in a rear plate 39 located in front of the blower 41.

A distribution duct 43 is formed inside the rear plate 39 so as to extend below the blower 41 and communicate with the cold air discharge duct 18.
8 communicates with a cool air discharge port 44 formed in the upper part of the rear surface of the refrigerating chamber 9. Reference numeral 46 is a heat insulating material for insulating the cold air discharge duct 18. Further, at the lower end of the back plate 39, the freezer compartment 8
The cold air suction port 47 is formed and communicates with the space below the cooler 38.

At the rear lower corner of the heat insulating box 6, a machine room 48 is provided.
A compressor 49 that constitutes a well-known refrigeration cycle is installed together with the cooler 38 therein. When the compressor 49 and the blower 41 are operated, the liquid refrigerant discharged from the compressor 49 and condensed in a condenser (not shown) is depressurized and supplied to the cooler 38, and evaporates inside, It takes the latent heat from the surroundings and exerts a cooling effect. The cool air cooled by the cooler 38 is sucked upward by the blower 41 and is blown into the freezer compartment 8 from the front cool air discharge port 42. The cool air blown into the freezer compartment 8 is circulated and cooled, and then returns to the lower part of the cooler 38 from the lower cool air suction port 48.

A part of the cool air blown out by the blower 41 flows into the distribution duct 43, descends there, passes through the cool air discharge duct 18, and is blown out from the cool air discharge port 44 into the refrigerating chamber 9. . The cold air blown into the refrigerating chamber 9 circulates and cools there, then flows into the cold air suction port 14 at the front end of the lower surface of the partition wall 7, passes through the cool air suction duct 19 in the partition wall 7, and opens 19A. It returns to the lower part of the cooler 38. The operation of the compressor 49 and the blower 41 is controlled by a controller (not shown) based on the temperature of the freezing compartment 8, and the supply of cold air to the refrigerating compartment 9 opens and closes the cold air outlet 44 based on the temperature of the refrigerating compartment 9. It is controlled by a damper (not shown), whereby the freezer compartment 8 has a predetermined freezing temperature (about -20 ° C) and the refrigerating compartment 9 has a predetermined refrigerating temperature (+ 5 ° C).
Maintained).

Due to the cold air circulation, the moisture in the chambers 8 and 9 becomes frost and adheres and grows in the cooler 38. Therefore, when the control unit integrates a predetermined operating time of the compressor 49, the controller 49 stops the compressor 49 and the blower 41, energizes the glass tube heater 29, and starts defrosting of the cooler 38. When the glass tube heater 29 is energized, the radiant heat generated therefrom heats the upper cooler 38, so that the frost on the cooler 38 gradually melts. With the progress of the defrosting, the defrosting water and the ice blocks that have melted fall from the cooler 38 and are received by the dew tray 2 located below. The ice block received in the dew tray 2 is a glass tube heater 29 that has transferred heat to the dew plate 24.
It is melted by the heat and the radiant heat, flows into the drain port 26 from the drain port 34 together with other defrost water, and is discharged to the outside through the drain hose 36. Then, when the defrosting of the cooler 38 progresses and the predetermined defrosting end temperature is reached, the control device stops the energization of the glass tube heater 29, and the compressor 4 again.
9 is started and the cooling operation is restarted.

Here, when the amount of defrost water dropped on the dew tray 2 is relatively large, the cold air suction duct 19 is extended from the extension portion 27.
However, since the opening 19A of the cold air suction duct 19 and the bottom wall 27A of the extension portion 27 are inclined rearward low, defrost water is unlikely to leak to the cold air suction duct 19 direction. There is. Further, since the opening portion 19A of the cool air suction duct 19 and the extension portion 27 are in surface contact with each other and adhered,
The defrosting water is surely prevented from invading between the two, so that the water in the partition wall 7 can be prevented in advance.

During the cooling operation, the return cool air from the refrigerating chamber 9 having a relatively high humidity flows into the dew tray 2 through the opening 19A of the cold air suction duct 19, and the inside of the dew tray 2 is a cooler. The temperature is low due to the cold air that naturally drops from 38. Therefore, the opening 19 of the cold air suction duct 19
Although frost is likely to grow on the inner surface of the extension portion 27 of the main dew tray 23 located at A, the heat from the glass tube heater 29 that generates heat during defrosting of the cooler 38 is extended through the base 31 of the dew receiving plate 24. Since it is also transmitted to the portion 33, the extension portion 27 of the main dew tray 23
The frost that has grown on the inner surface is also smoothly melted and removed when the cooler 38 defrosts. Therefore, the frost blockage of the cold air suction duct 19 is eliminated, and it is not necessary to provide a special heater or the like as in the conventional case.

On the surface of the glass tube heater 29,
A deodorizing paint composed of a mixture of platinum, alumina, zeolite, and silica is applied, and the deodorizing paint adsorbs the odorous components in the circulating cold air passing therethrough during the cooling operation, whereby the freezer compartment 8 and the refrigerating compartment 9 are The inside is deodorized.
In addition, the odorous component adsorbed on the deodorizing paint is the cooler 3
By the heat generated by the glass tube heater 29 during defrosting of No. 8, it is sublimated and decomposed.

In the embodiment, the dew tray 2 is composed of two parts, the main dew tray 23 made of synthetic resin and the dew receiving plate 24 made of aluminum, but the invention is not limited to this. It does not matter if it is configured by one part such as a member.

[0026]

As described above in detail, according to the present invention, since the extended portion of the dew tray enters the cold air suction duct through the opening along the inner surface of the cold air suction duct, the dew tray and the cold air suction duct are introduced. The opening of the duct is in surface contact with the extension of the dew tray. Therefore, the sealing performance between the dew tray and the partition wall is improved, and the work of sealing the partition wall and the dew tray at the opening of the cold air suction duct can be simplified.

Further, since the heat of the defrosting heater arranged between the dew tray and the cooler is transferred to the extension portion when the cooler is defrosted, the heat of the cooler suction duct is simultaneously removed from the cooler. Frost on the opening is also melted and removed. Therefore, it is possible to prevent the frost blockage of the cold air suction duct, and eliminate the need for a special heater for heating the opening, thereby reducing the number of parts and the cost.

[Brief description of drawings]

FIG. 1 is an enlarged vertical side view of a dew tray portion of a refrigerator according to the present invention.

FIG. 2 is a front view of the refrigerator.

FIG. 3 is a vertical sectional side view of the refrigerator.

FIG. 4 is an exploded perspective view of a dew tray and a heat insulating material of a partition wall.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Dew tray 3 Insulating material 6 Insulation box 7 Partition wall 19 Cold air suction duct 19A Opening 23 Main dew tray 24 Dew receiving plate 27 Extension 33 Extension 29 Glass tube heater 38 Cooler

Claims (1)

[Claims] 1. A partition wall for partitioning an insulating box into upper and lower parts, a cooler arranged above the inner part of the partition wall, a dew tray arranged below this cooler, and this dew tray. In the refrigerator including the defrost heater for the cooler arranged between the cooler and the cool air suction duct arranged in the partition wall and opened at a position lower than the cooler, the dew tray The refrigerator is characterized in that an extension portion is formed which extends from the opening of the cold air suction duct along the inner surface of the duct.