JPH0560451A - Refrigerator - Google Patents

Abstract

PURPOSE:To prevent deformation of an oblique part of a dew reception tray due to foaming pressure of a foamable heat insulator of a refrigerator body and to obtain an effective flow of defrosted water by providing spaces at the tray and an inner box, and disposing heat insulation pieces in the spaces. CONSTITUTION:A refrigerator body 1 is composed of an outer box 2, an inner box 3 and foamable heat insulator 4 filled between the boxes 2 and 3. A dew reception tray 27 receives defrosted water periodically defrosted from frost on a cooler 16 by an automatic timer, and a heat insulation piece 28 of foamed styrol, etc., is disposed between the tray 27 and the box 3. Since the tray can be formed without influence of the foaming pressure of the insulator filled between the boxes 2 and 3 to the oblique angle of the inner surface 27 of the tray, drain water after defrosting the cooler 16 is effectively fed on the inner surface 27b of the tray and water droplets do not remain, and hence clogging of a drain tube 27a can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dew tray for draining frost attached to a cooler such as a refrigerator after defrosting, and prevents deformation of the dew tray due to the pressure of the foamed heat insulating material of the refrigerator body. Regarding a dew tray that ensures an appropriate drainage slope and ensures reliable water flow.

[0002]

2. Description of the Related Art In recent years, with the increase in storage of frozen foods, there is a tendency to place a freezing compartment at a low position where foods can be easily taken in and out as a storage place for frozen foods. In addition, the cooler and the dew tray below the cooler must be placed at a low position according to the position of the freezer.

An example of a refrigerator provided with a dew tray at the above-mentioned position will be described below with reference to the drawings.
FIG. 3 is a partial cross-sectional view of a dew tray portion of a refrigerator-freezer NR-B8M2 manufactured by Matsushita Electric Co., Ltd. released in October 1990. Reference numeral 1 denotes a refrigerator body, which is composed of an outer box 2, an inner box 3 and a foaming heat insulating material 4 filled between the boxes 2 and 3. A cooler 5 is attached and fixed to the inner box 3 with an aluminum foil. 6 is an electric heater for defrosting, and 7 is a dew tray integrally formed with the inner box, which is located below the cooler. 8
Is an aluminum foil for conducting the heat of the defrosting electric heater and is located on the outer surface of the dew tray 7.

Reference numeral 9 denotes a cylindrical drain pipe, which is a hole 1 in the outer box 2.
0, which communicates with the holes 11 of the inner box 3. A seal material 13 such as butyl rubber is press-fitted and fixed around the cylindrical drain pipe 9 and the through hole 11 of the inner box 3. Reference numeral 14 is a tightening piece equipped with a screw mechanism, which is fitted to the drain pipe 9 to tighten and fix the inner box 3. 13a is a sealing material such as soft urethane foam, and is a flange portion 9a of the drain pipe 9.
And is located between the outer boxes 2 to prevent the foaming heat insulating material 4 from leaking.

In the refrigerator constructed as described above,
The cool air cooled by the cooler 5 conducts heat to the inner box 3 and circulates in the refrigerating chamber, and the cooler 5 simultaneously passes the moist air on the surface of the inner surface 3a of the inner box 3 so that Since frost adheres to the inner surface 3a of the box 3 to lower the cooling performance, it is melted and defrosted when the cooling operation is stopped and periodically by the heat of the electric heater 6 or the like. Defrosted saucer 7 for melted frost
Then, the water is drained from the drain port provided at the bottom of the dew tray.

[0006]

However, in the above-mentioned structure, the outer casing 2 and the inner casing 3 are provided while the inclination of the dew tray is constantly maintained to the drainage port at the bottom of the dew tray without unevenness. It is necessary to fill and foam the foamable heat insulating material 4 between them. However, since the foaming pressure of the foam insulation material filled between the outer box 2 and the inner box 3 is normally 220 g / Cm @ 2, the dew pan 7 of the inner box 3 is pressed when the foam insulation material 4 foams. Since it is expected that foaming will be stable while deformed and unable to maintain the initial shape and deformed irregularly, usually a jig 15 having the same shape as the inner surface shape of the dew receiving tray 7 is installed on the inner surface of the dew receiving tray. The heat insulating material 4 is being filled.

However, when the jig 15 is inserted, misalignment, floating, etc. may occur, and the dew tray part 7 may be foamed and stable while being deformed into an uneven shape by the foaming pressure of the foamable heat insulating material 4. There was a problem that the water during frost remained on the uneven portion, developed into ice blocks by repeated cooling and defrosting, and at the worst, blocked the drain pipe, and the defrosted water overflowed from the dew tray.

In view of the above-mentioned conventional drawbacks, the present invention forms a special jig during foaming by forming the inner box and the dew tray separately and inserting a heat insulating piece such as Styrofoam between the inner box and the dew tray. (EN) A refrigerator provided with a drainage device capable of maintaining the inclination angle of the inner surface of a dew tray without using any of the above, and making sure the flow of water after defrosting.

[0009]

An outer box, an inner box, a foam insulating material filled between the boxes, an upper refrigerating chamber and a lower freezing chamber defined by partition walls, and a back portion of the freezing chamber. And a heat insulating wall for partitioning the cooler and the freezer compartment, a dew pan at the lower part of the cooler, and a first drain pipe integrally formed at the lowest position of the dew pan and the drain pipe and the periphery of the drain pipe. A heat insulating piece such as Styrofoam provided with a through hole of the inner box, a second drain pipe closely attached to the periphery of the through hole, and a through hole of the waste water pipe located between the inner box and the dew tray. And a drainage device characterized in that the tip of the first drainage pipe is located below the through-hole of the inner box A seal member is provided between the inner box through hole and the upper flange of the second water pipe. Refrigerator having a drainage device, characterized in that the.

[0010]

The refrigerator of the present invention has the above-described structure, the dew tray is integrally formed of a resin molded product, and a heat insulating piece such as Styrofoam is inserted between the inner box and the dew tray. It is possible to maintain the dimension of the inclination of the inner surface of the dew tray without being affected by the foaming pressure of the foaming heat insulating material filled between the inner box and the outer box, and to reliably discharge the defrost water. It is possible to prevent the defrosting water from overflowing from the dew tray due to clogging of the drainage pipe due to freezing of residual water on the dew tray.

Further, since the tip of the first drainage pipe is located below the through hole of the inner box, water at the time of defrost does not splash and water is supplied to the heat insulating piece side so that the heat insulating performance of the heat insulating piece is not deteriorated. .. Further, since the inner box through port is located on the inner circumference of the upper flange of the water distribution pipe and is tightly fixed by the sealing member, the second water distribution pipe is clogged and the defoaming water is foamed even if the water level rises to the inner box through port. The heat insulating material does not absorb water and the heat insulating performance of the foamable heat insulating material is not deteriorated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a refrigerator-freezer according to an embodiment of the present invention, and FIG. 2 is a partial sectional view of the present invention. The same components as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted. Reference numeral 1 denotes a refrigerator body, which is composed of an outer box 2, an inner box 3 and a foaming heat insulating material 4 filled between the boxes 2 and 3. Reference numeral 16 is a cooler, 17 is a freezing room cold air suction port, 18 is a freezing room cold air discharge port, and 19 is a blower driven by a fan motor. Reference numeral 20 denotes an adiabatic wall that divides the cooler 16 and the freezer compartment 21 and cools the heat of the cooler 16 to exchange heat with the freezer compartment 21 and the refrigerating compartment 2.
Cycle to 3. The front freezer compartment 21 and the refrigerating compartment 23 are partitioned by a partition wall 24. Reference numeral 25 denotes a coil cover located at the front of the cooler 16 for distributing cold air. The plurality of freezer compartment cold air discharge openings 18 provided in the coil cover 25 are provided in the freezer compartment 21 as a plurality of food containers. 26 are arranged at positions where the cool air is discharged and supplied.

Reference numeral 27 denotes a dew pan for receiving defrost water obtained by regularly defrosting the frost formed on the cooler 16 with an automatic timer.
Is a heat insulation piece made of styrofoam, etc.
7 and the inner box 3 are arranged. Reference numeral 29 is a heat reflecting plate made of aluminum or the like and is arranged on the inner surface of the dew receiving tray 27. Three
Reference numeral 0 denotes a drain pipe, which is tightly fixed around the through hole 3a of the inner box 3 around the protruding portion 27a of the dew tray 27 with a sealing material 31 made of butyl rubber or the like. The lower end of the drain pipe 30 is located on the upper surface of the evaporation dish 32.

With the above-mentioned structure, the dew tray is formed without the inclination angle of the inner surface 27b of the dew tray being influenced by the foaming pressure of the foaming heat insulating material filled between the outer box 2 and the inner box 3. Therefore, the drainage after defrosting the frost frosted on the cooler 16 surely flows on the inner surface 27b of the dew tray, and since no water droplets remain, it develops into a lump of ice and clogging of the drain pipe 27a. Can be prevented.

[0015]

As described above, according to the present invention, the outer box, the inner box, the foam heat insulating material filled between the boxes, the upper refrigerating chamber and the lower freezing chamber defined by the partition wall, A cooler installed at the back of the freezer compartment, a heat insulating wall for partitioning the cooler and the freezer compartment, a dew pan under the cooler, and a first drain pipe and a drain pipe integrally formed at the lowest position of the dew pan Styrofoam provided with a through hole of the inner box formed in the periphery, a second drain pipe closely attached to the periphery of the through hole, and a through hole of the waste water pipe located between the inner box and the dew tray Since the heat insulating piece and the tip of the first drainage pipe are arranged below the through hole of the inner box,
After defrosting the frost that has frosted on the cooler, the dew pan can be formed without the inclination angle of the inner surface of the dew pan being affected by the foaming pressure of the foam insulation material filled between the outer and inner boxes. The drainage of (3) reliably flows through the inner surface of the dew tray, and water droplets do not develop into a lump of ice remaining, so that defrost water can be prevented from overflowing from the dew tray.

Further, since the tip of the second drainage pipe at the lower part of the dew tray is located below the through hole of the inner box, the splashing of water at the time of defrosting prevents the water from splashing on the heat insulating piece and prevents the water from absorbing. It is possible to prevent deterioration of heat insulation performance.

Further, since the inner box through-hole is provided inside the second water pipe upper surface opening flange and tightly fixed by a seal member, the second drain pipe is clogged due to accumulation of dust and the like, and the defrosting water level is the above-mentioned. Even if the foamable heat insulating material does not absorb water even when it rises up to the inner box through-hole, it is possible to prevent adverse effects such as deterioration of the heat insulating performance of the foamable heat insulating material.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a refrigerator showing an embodiment of the present invention.

FIG. 2 is an enlarged partial sectional view of the refrigerator.

FIG. 3 is a sectional view of a main part of a conventional refrigerator

[Explanation of symbols]

 2 Outer box 3 Inner box 3a Through hole 4 Foaming heat insulating material 16 Cooler 21 Freezer room 23 Refrigerating room 24 Partition wall 27 Dew tray 27a First drain pipe 28 Insulation piece 30 Second drain pipe 30a Top opening flange

Claims (3)

[Claims] 1. An outer box, an inner box, a foam insulating material filled between the boxes, an upper refrigerating chamber and a lower freezing chamber, which are partitioned by partition walls, and cooling installed on the back of the freezing chamber. Insulation wall for partitioning the cooler, the cooler and the freezer compartment, the dew pan under the cooler, the first drain pipe formed at the lowest position of the dew pan, and the penetration of the inner box opened around the drain pipe A heat insulating piece such as Styrofoam provided with a hole and a second drain pipe closely attached to the periphery of the through hole and a through hole of the first drain pipe located between the inner box and the dew tray A refrigerator with a drainage device. 2. The refrigerator according to claim 1, wherein a tip end portion of the first drain pipe formed at the lowest position of the dew tray is located below a through hole of an inner box located below the dew tray. 3. An upper opening flange portion of the second drain pipe, an inner box through hole located on the inner circumference of the flange portion, and a seal member between the inner box through hole and the second drain pipe upper surface flange. The refrigerator according to claim 2, wherein the refrigerator is used.