JPH11183018A - Drain outlet of refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an drain outlet for refrigerator which ensures finish of good appearance while reducing the number of parts, labor and the working time by carrying out a series of works from formation of a drain outlet to formation of a heat insulating layer of a refrigerator. SOLUTION: Through holes 7, 7' are made coaxially through the bottom plates 2, 1 of inner and outer shells, the inner circumferential fringe of the through hole 7' is bent 9 and fitted to the upper inner surface of a drain outlet 3. Upper surface of the upper end flange 11a of a drain outlet forming member 8 is abutted against the rear circumferential side of the through hole 7' and the partial external thread 15 of a drainage plug 13 is screwed into the partial internal thread of the drain outlet 3 in the member 8 thus securing the member 8 into the through hole 7'. Inner side face of the through hole 7 is applied tightly to the lower surface of the lower end flange 11b of the member 8 through a packing 12 and a foamable resin compound 5 is injected into a space between the bottom plates 1, 2 for forming an heat insulating layer 6 and foamed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator outlet having a heat insulating layer formed by injecting and foaming a foamable resin mixture into a space between an outer shell and an inner shell.

[0002]

2. Description of the Related Art The drain of a refrigerator according to the prior art is shown in FIG.
As shown in FIG. 5, a recess 44 is provided at a position where the drain port 43 of the inner shell bottom plate 42 of the refrigerator is to be provided, and a hole 55 for inserting the drain port forming member 48 is provided on the same axis from the inner shell to the outer shell.
A seal 56 is attached from the inside of the hole 55, and a foamable resin mixture 45 is injected and foamed in the space between the outer shell and the inner shell to form a heat insulating layer 46. Thereafter, a hole saw or a drill is formed in the recess 44. A drain hole forming member 48 is inserted into the through hole 47, a gap 49 between the heat insulating layer 46 and the drain hole forming member 48 is filled with a heat insulating material 50, and a lower opening portion 51 is formed. A sealing member 52 is packed in the gap, and a receiving seat 54 of a drain plug 53 is fixed above the drain port forming member 48, and the drain plug 53 is fitted into the receiving seat 54.

[0003]

The drain port of the conventional refrigerator configured as described above requires a large number of parts, man-hours and time to form the drain port, and also desires a clean finish of the drain port. And it was troublesome to attach and remove the drain cock.

The present invention has been made in view of the above-mentioned problems of the prior art, and enables reduction of man-hours and the number of parts for forming a drain port.
Further, it is an object of the present invention to provide a refrigerator drain port which makes the finish of the drain port clean and makes it easy to attach and detach the drain plug.

[0005]

According to a first aspect of the present invention, a foamable resin mixture is injected and foamed into a space formed between an outer shell and an inner shell to form a heat insulating layer. In a refrigerator, a through hole is formed on the outer shell bottom plate and the inner shell bottom plate on the same axis, and an upper surface of an upper end flange of the drain hole forming member is fixedly abutted on the back side around the through hole of the inner shell bottom plate. The inner surface of the through hole of the outer shell bottom plate is brought into close contact with the lower surface of the lower end flange of the lower shell, and then the foaming resin mixture is injected and foamed into the space formed between the outer shell and the inner shell. It is.

In the present invention configured as described above,
The work from disposing and fixing the drainage hole forming member between the inner shell bottom plate through hole and the outer shell bottom plate through hole to injecting and foaming the foamed resin admixture can be performed as a series of operations. The drilling work, the filling work of the sealing material and the like are not required, and the number of parts, man-hours and working time can be reduced.

According to a second aspect of the present invention, the inner peripheral edge of the inner shell bottom plate through-hole is bent vertically downward to form a bent edge, and the bent edge is fitted to the upper inner surface of the drain port of the drain port forming member. By screwing a drainage plug provided with a partial male screw that is screwed to the outer circumferential surface of the plug with the partial female screw provided on the inner surface of the mouth, the drainage port forming member is placed on the back side of the inner shell bottom plate through hole. Is adopted.

In the present invention configured as described above,
The central axis of the drain port forming member is determined by bending the inner peripheral edge of the inner shell bottom plate through hole vertically downward, and the drain plug is screwed into the drain port forming member, and at the same time, the drain port forming member for the through hole of the inner shell bottom plate. The drainage plug after completion is ready for actual use.

According to a third aspect of the present invention, in the drain port forming member, a lower portion thereof has a double structure of an outer cylinder and an inner cylinder, a female screw is provided on an inner surface of the outer cylinder, and the outer cylinder and the inner cylinder are provided. Adopts a configuration integrated at the top.

In the present invention configured as described above,
At the time of drainage, the drainage does not enter the heat insulation layer, and
Attachments such as drain traps can be connected to the drain outlet.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment according to the present invention will be described with reference to FIGS. Drain port forming member 8
Are flanges 11a, 11a above and below the drain port 3 as an axis.
b is provided integrally and the lower part of the drain port 3 is an outer cylinder 3a and an inner cylinder 3
b, the inner and outer cylinders are integrated at the upper part, and the inner surface of the integrated drain port 3
A slightly less than / 4 partial female screw 14 is provided, and a female screw 16 is provided on the inner surface of the outer cylinder 3a.

The drain plug 13 is integrally provided with a flange 11c at the upper end of the plug 13 ', and is provided with a partial male screw 15 which is 180 degrees out of phase with the outer circumference of the plug 13' and is slightly less than 1/4 of the outer circumference. 14. The protrusion at the upper center of the drain plug 13 is a knob 10 for turning the drain plug 13.

The outer shell bottom plate 1 and the inner shell bottom plate 2 are provided with through-holes 7 and 7 'on the same axis, and the inner shell bottom plate 2 is provided with a recess 4 at a portion where the through-hole 7' is provided. , Through hole 7 '
Is bent vertically downward to form a bent edge 9.

The flange 11a at the upper end of the drain port forming member 8
Abuts against the back side of the through hole 7 ′ of the inner shell bottom plate 2,
The bent edge 9 of the through hole 7 ′ is fitted to the upper end of the hole, and the packing 1 is
The inner surface of the through-hole 7 of the outer shell bottom plate 1 is in close contact with each other via 2.

Next, a description will be given in accordance with an operation procedure for forming a drain port. The upper end flange 11a of the drain hole forming member 8 is brought into contact with the back surface around the inner shell bottom plate through hole 7 ', and the through hole 7' bent edge 9 is fitted to the upper end of the drain hole 3 of the drain hole forming member 8.
The drain port forming member 8 is fixed to the through hole 7 ′ of the inner shell bottom plate 2 by screwing the plug 13 ′ of the drain plug 13. The packing is previously attached to the lower surface of the flange 11b at the lower end of the drainage port forming member.

In this state, the outer shell bottom plate 1 provided with the through hole 7 in advance is applied from below the flange 11b of the drainage hole forming member 8, and the inner side surface of the outer shell bottom plate 1 around the through hole 7 and the inner shell bottom plate. A drain port forming member 8 is mounted between the through hole 7 ′ and the rear side surface around the through hole 7 ′.

When the installation of the drainage port forming member 8 is completed, the foamable resin mixture is injected and foamed into a space formed between the outer shell and the inner shell from an injection port (not shown) to form a heat insulating layer. At this time, the drain port forming member is fixed to the inner shell bottom plate around the through hole 7 'by screwing a partial female screw on the inner surface of the drain port and a partial male screw on the drain plug, so that the expansion pressure of the foamable resin admixture is increased. And the foaming resin does not leak.

[0018]

As described above, according to the present invention,
The formation of the drain port of the refrigerator and the formation of the heat insulating layer can be performed as a series of operations, and the clean finish of the drain port,
The number of parts to be formed, man-hours and work time can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a first embodiment according to the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3A is a cross-sectional view of the bottom of a refrigerator before forming a drain port according to the related art. FIG.

[Explanation of symbols]

 1,41 outer shell bottom plate 2,42 inner shell bottom plate 3,43 drainage port 4,44 depression 5,45 foamable resin admixture 6,46 heat insulating layer 7,7 ', 47 through hole 8,48 drainage hole forming member 9 Folded edge 10 Knob 11, 11a, 11b Flange 12 Packing 13, 53 Drain plug 13 'Plug 14 Partial female screw 15 Partial male screw 16 Female screw 49 Gap 50 Heat insulating material 51 Lower opening 52 Sealing material 54 Receiving seat 55 Drainage port formation Hole for inserting the member 56 Seal

Claims (3)

[Claims] 1. A refrigerator having a heat insulating layer formed by injecting and foaming a foamable resin mixture into a space formed between an outer shell and an inner shell, wherein a through hole is coaxially formed in the outer shell bottom plate and the inner shell bottom plate. The upper surface of the upper end flange of the drain hole forming member is fixedly abutted on the back side around the through hole of the inner shell bottom plate, and the inner surface of the through hole of the outer shell bottom plate is closely contacted with the lower surface of the lower end flange of the drain hole forming member. A drain port for a refrigerator, wherein a foamable resin mixture is injected and foamed into a space formed between the outer shell and the inner shell. 2. A bent edge is formed by bending an inner peripheral edge of the inner shell bottom plate through hole downward in the vertical direction, and the bent edge is fitted to an upper inner surface of a drain port of a drain port forming member, and provided on the inner surface of the drain port. The drain port forming member is fixed to the peripheral back side of the inner shell bottom plate through-hole by screwing a drain plug provided with a partial male screw that is screwed to the outer peripheral surface of the plug with the partial female screw to the partial female screw. The drain of a refrigerator according to claim 1, wherein: 3. The drainage port forming member has a double structure in which a lower portion has an outer cylinder and an inner cylinder, a female screw is provided on an inner surface of the outer cylinder, and the outer cylinder and the inner cylinder are integrated at an upper portion. A drain outlet for a refrigerator, which is characterized by being formed into a drain.