JPH0749908B2 - Defrosting water drainage device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defrost water drainage device such as a refrigerated showcase of a refrigerator.

2. Description of the Related Art A conventional example will be described with reference to FIGS. Reference numeral 1 denotes a refrigerator main body, which is composed of an outer box 2, an inner box 3, and a urethane heat insulating material 4 filled between these boxes, and a partition wall 5 is formed by integral molding in the inner box 3 and a freezer compartment 6 is provided at an upper portion. The lower part is partitioned into the refrigerating compartment 7. A cooler 8 is installed on the inner surface of the freezer compartment, and a fan 9 for circulating cold air is provided on the upper part of the cooler 8, while frost attached to the cooler 8 is installed on the lower part of the cooler 8. A dew tray 10 for receiving the melted defrost water is provided. The bottom of the dew tray 10 is provided with a cylindrical drain hole 10a for draining defrost water. Reference numeral 11 denotes a drain pipe which is inserted and connected to the tip of the drain hole 10a and is embedded in the urethane heat insulating material 4. The bent pipe 11a is provided at an upper portion and extends to the evaporation tray 12 provided at the bottom of the refrigerator body 1. ing. Inside the partition wall 5, there is a styrofoam or the like having a duct 13 through which cold air circulated in the refrigerating chamber 7 returns to the cooler 8 and the outer periphery of the dew tray 10 and having a hole 14 penetrating the drain hole 10a. The formed heat insulating material 15 is provided. 16 is a drainage hole 10a
It is a fixture for fixing the drainage pipe connected to the tip. Reference numeral 17 is a sealing material for preventing the urethane heat insulating material 4 from entering through a gap 18 formed between the hole 14 of the heat insulating material 15 and the drain hole 10a.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a configuration, after attaching the dew tray 10 to the heat insulating material 15, the drain pipe 11 is inserted at the tip of the drain hole 10a, and the connecting portion is fixed by the fixture 16. After that, use the seal material 17 to make a gap 18
However, when the drainage pipe 11 is installed at the bottom of the refrigerator body 1, a considerable pulling force or a lateral force is applied to the connection portion of the drainage pipe 11, so that the sealing material 17 moves and seals. The urethane heat insulating material 4 intrudes through the gap 18 and flows into the dew tray 10 due to the shaking. Further, when a tensile force is applied to the connecting portion, the drainage pipe 11 slips out of the drainage hole 10a, creating a gap,
In some cases, the urethane heat insulating material 4 enters the inside of the drainage pipe 11 through the gap and is clogged so that the drainage function is not fulfilled. When the drain pipe 11 is inserted and connected to the drain hole 10a,
Since the connecting part is cylindrical, it can be installed at any position of 360 °, and if it is installed at the position as shown in the figure (two-dot chain line in Fig. 7), it will hit the back 3a of the inner box and cannot be assembled, or , Even if it can be assembled, stress is applied to the connection,
There was a problem of breaking the seal.

The present invention solves such a conventional problem, and secures the attachment of the drain pipe 11 to the drain hole 10a of the dew tray 10 to prevent the urethane heat insulating material 4 from entering the dew tray 10. ,
Also, the purpose is to fix the mounting position of the drainage pipe.

Means for Solving the Problems In view of the above problems, the present invention relates to a drainage pipe having a locking portion and a flat plate-shaped locking portion that are locked to a locking piece having a flat plate-shaped projection provided in the drain hole of the dew tray. A concave portion that engages with the positioning piece, a circular seal portion is provided at the upper end of the locking portion, and a seal material is provided between the seal portion and a heat insulating material formed of expanded polystyrene or the like.

Operation According to the present invention, since the drain pipe is reliably incorporated in the dew tray with the above-described configuration, even if an external force such as a pulling force is applied to the connection portion between the drain pipe and the drain hole of the dew tray, the gap and the deviation are caused. As a result, it is possible to reliably prevent the infiltration of the seal urethane insulating material. Further, since the drain pipe is provided with a recessed portion that engages with a flat plate-shaped positioning piece provided in the drain hole of the dew tray, the mounting position (direction) is determined and the drain pipe 11 is bent on the inner box rear surface 3a. Assembling can be performed without hitting the portion 11a, and reliable sealing can be performed without applying stress to the sealing portion.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings. For the numbers in the figure that match those of the conventional example, the numbers of the conventional example are used.

In FIGS. 1 to 5, reference numeral 1 denotes a refrigerator main body, which is composed of an outer box 2, an inner box 3 and a urethane heat insulating material 4 filled between these boxes, and the inner box 3 is integrally molded to form a partition wall 5. The upper part is divided into the freezer compartment 6 and the lower part into the refrigerating compartment 7. A cooler 8 is installed at the back of the freezer.
A fan 9 for circulating cold air is provided above the cooler 8.
On the other hand, in the lower part of the cooler 8, a dew tray 19 for receiving defrosting water that melts the frost adhering to the cooler 8 is provided. A cylindrical drain hole 19a for draining defrost water is provided on the bottom surface of this dew tray. On the outer periphery of the drainage hole 19a, several locking pieces 19c each having a flat plate-like protrusion 19b and a flat plate-shaped positioning piece 19d are provided, and a cut groove 19e is provided near the locking piece 19c.

Reference numeral 20 denotes a drain pipe that is inserted and connected to the tip of the drain hole 19a and is embedded in the urethane heat insulating material 4, and extends to the evaporation tray 12 provided at the bottom of the refrigerator body 1. At one end opening of the drainage pipe 20, a locking portion 20a that locks to a locking piece 19c having a flat plate-shaped projection portion 19b provided in the drainage hole 19a, and a recessed portion 20b that locks to a flat plate-shaped positioning piece 19d. A circular seal portion 20c formed at the upper end of the locking portion 20a is provided. The partition wall 5 is formed of styrofoam or the like having a hole 14 that covers the outer circumference of the duct 13 and the dew tray 19 through which the cool air circulated in the refrigerating chamber 7 returns to the cooler 8 and that penetrates the drain hole 19a. A heat insulating material 15 is provided. Reference numeral 21 is a seal material that is attached between the lower portion 22 of the hole 14 of the heat insulating material 15 and the seal portion 20c.

In the above structure, when attaching the drainage pipe 20 to the drainage hole 19a, a locking piece having a protrusion 19b provided on the outer periphery of the drainage hole 19a.
Since 19c has a kerf 19e as shown (two-dot chain line), it easily moves and is inserted into the locking portion 20a. Locking piece 19c
After being inserted into the locking portion 20a, the locking piece 19c returns to the original position and is locked to the locking portion 20a, so the drain pipe 20 is
It is easily attached and connected to the drain hole 19a, and even if an external force such as a pulling force is applied to the connecting portion, there is no gap or misalignment or disengagement between the lower portion 22 of the hole 14 of the heat insulating material 15 and the seal portion 20c. Sealing material 21 is securely sealed without external force,
There is no infiltration of the urethane heat insulating material 4 and a sufficient drainage channel can be secured. Further, since the drain pipe 20 is provided with the recess 20b that engages with the flat plate-shaped positioning piece 19b provided in the drainage hole 19a, the mounting position (direction) is fixed, and the assembly can be performed without hitting the inner box rear surface 3a. .

EFFECTS OF THE INVENTION As will be apparent from the above description, the present invention has an engaging portion that engages with a flat plate-like protrusion provided near the drain hole tip of the dew tray provided at the one end opening of the drainage pipe, The circular seal portion formed at the upper end of the locking portion and the sealing material provided between the sealing portion and the lower portion of the hole of the heat insulating material formed of expanded polystyrene etc. The drainage pipe is securely attached to the drainage hole of the dew tray by locking the drainage pipe to the locking piece having the flat plate-shaped protrusion of the dew tray, and even if external force such as pulling force is applied to the connection part, the gap There is no occurrence of slippage or dislocation, and a reliable seal is obtained, and there is no infiltration of urethane heat insulating material, and a sufficient drainage channel can be secured. In addition, since it has a recess that engages with a flat plate-shaped positioning piece provided in the drain hole of the dew tray formed in a part of the locking portion of the drain pipe, the drain pipe mounting position (direction) Since the drainage pipe is fixed to the inner box, the drainage pipe does not come into contact with the rear surface of the inner box and the assembly becomes impossible.

[Brief description of drawings]

FIG. 1 is a sectional view of a refrigerator showing an embodiment of the present invention, and FIG.
FIG. 3 is an enlarged cross-sectional view of the main part of FIG. 1, and FIG. 3 is AA of FIG.
Sectional view, FIG. 4 is a sectional view of the dew tray drain hole, FIG. 5 is a plan view of the dew tray drain hole, and FIG. 6 is a sectional view of a conventional refrigerator.
FIG. 7 is an enlarged cross-sectional view of the main part of FIG. 5 ... Partition wall, 8 ... Cooler, 14 ... Hole, 15 ... Insulation material, 19 ... Dew pan, 19a ... Drain hole, 19b ... Projection, 19
c …… Locking piece, 19d …… Positioning piece, 20 …… Drainage pipe, 20a
...... Locking part, 20b ...... Concave part, 20c ...... Seal part, 21 ...... Sealant.

Claims (1)

[Claims] 1. A vertically divided two chamber, a partition wall for partitioning the two chambers, a cooler installed at the inner surface of the upper chamber, and frost attached to a cooler provided at the lower part of the cooler. A dew pan that receives the melted defrost water, a cylindrical drainage pipe that drains the defrosted water in the dew pan to the outside, and the vicinity of the drain hole tip of the dew pan provided at one end opening of this drain pipe An engaging portion for engaging with an engaging piece having several flat plate-shaped protrusions provided on the plate, and a flat plate-like member provided in the drain hole of the dew tray formed in a part of the engaging portion. A heat insulating material having a concave portion that engages with the positioning piece, a circular seal portion formed at the upper end of the locking portion, and a hole that covers the outer periphery of the dew tray and penetrates the drain hole of the dew tray. And a defrosting water drainage device comprising a seal portion of the drain pipe and a seal material provided between lower portions of the holes of the heat insulating material.