JPH0138475Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an improvement of the gas vent hole of a refrigerator insulation box body filled with urethane insulation material.

[Prior art]

Figures 1 and 2 are for example Mitsubishi Electric's MR-2361.
This figure shows the conventional structure of a type electric refrigerator. In the figure, 1 is a rear plate, 2 is a gas vent hole provided in this rear plate, and 3 is a gas vent tape attached to the back side of the rear plate 1. . 4 is a urethane insulation material.

After pasting the gas vent tape 3 with an adhesive or the like on the back side of the gas vent hole 2 provided in the rear plate 1 configured as described above, when the urethane insulation material 4 is injected, the urethane insulation material foams and expands. As a result, the gas inside the box passes through the gas vent tape 3 and is discharged from the gas vent hole 2 to the outside of the box. However, the foamed and expanded urethane heat insulating material 4 is blocked by the gas venting tape 3, so that it does not leak out of the box.
That is, in order to fill every corner of the box body with the urethane heat insulating material 4, it was necessary to provide a large number of gas vent holes 2 in the rear plate 1.

As mentioned above, conventional gas vent holes 2 are provided in the back plate 1 in order to improve the filling performance of the urethane insulation material 4. Having the gas vent hole 2 is considered to be unfavorable in terms of the design of the rear panel of the refrigerator.In particular, in recent years, a good design of the back surface of a refrigerator has a great influence on product sales, so the gas vent hole 2 provided in the rear panel 1 is said to be undesirable in terms of design. There were flaws.

[Summary of the idea]

This idea was made in order to eliminate the drawbacks of the conventional ones as mentioned above, and by providing many gas vent holes in the drain pipe, the gas vent holes in the rear panel were eliminated, and a refrigerator with a good back design was created. It is intended to.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings. In Figures 3 and 4, 5 is a cooler, 6
is a dew tray that receives frost water eluted from the cooler 5 due to defrosting. A drain pipe 7 is buried in the urethane insulation material 4, and one end is connected to the dew pan 6, and the other end is extended to the upper surface of the evaporation pan 8 at the bottom of the outside of the refrigerator, so that the evaporation pan receives frost water. This is the structure for deriving . Moreover, this drain pipe 7 has a plurality of minute holes that communicate with the inner wall and the outer wall over the entire circumference.

Next, the effect will be explained. By injecting the urethane insulation material 4 with one end of the drain pipe 7 having a minute hole 7a connected to the condensation pan 6 and the other end connected to the outside bottom of the refrigerator, the urethane insulation material foams and expands, causing the box to open. Gas inside the body is removed from the tiny hole 7a in the drain pipe.
It passes through the drain pipe and is discharged outside the box.

However, the foamed and expanded urethane heat insulating material 4 has a structure that does not leak into the drain pipe 7 because the holes in the drain pipe are minute. As a result, the gas inside the box when the urethane insulation material is foamed is quickly discharged to the outside of the box, and the urethane insulation material can be filled to every corner of the box.

In addition, in the above example, if the hole in the drain pipe is made larger and a degassing tape is attached around the drain pipe, the gas inside the box when the urethane insulation material is foamed will be more quickly discharged to the outside of the box. The filling properties of the urethane insulation material can be further improved.

[Effects of the invention] As mentioned above, this invention creates a small hole in the drain pipe buried inside the urethane insulation material to release gas when the urethane insulation material is foamed, so it can be used to remove gas from the back of the refrigerator like before. It is possible to eliminate the gas vent hole provided in the rear plate, thereby providing a good back design of the refrigerator.

[Brief explanation of the drawing]

Figure 1 is a rear perspective view of a conventional refrigerator, Figure 2 is a sectional view taken along the - line in Figure 1, Figure 3 is a cross-sectional view of the refrigerator according to this invention, and Figure 4 is an oblique view of a drain pipe according to this invention. figure. In the figure, 1 is the rear plate, 2 is the gas vent hole, 4 is the urethane insulation material, 5 is the cooler, 6 is the dew pan, 7 is the drain pipe,
7a is a minute hole in the drain pipe, and 8 is an evaporation dish. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] One end of the drain pipe buried in the urethane insulation wall that forms the refrigerator body is directly connected to the dew pan that receives dew from the cooler, and the other end is extended to the top of the evaporation tray installed at the bottom of the outside of the refrigerator. 1. A refrigerator which is arranged so that water is discharged to an evaporating dish, characterized in that a plurality of minute holes are provided all around the drain pipe to communicate between an inner wall and an outer wall.