JPH0391682A - Ice box - Google Patents

Abstract

PURPOSE:To obtain an ice box with a high reliability by providing a plurality of the portions of a projected strip groove formed on an inner casing with undercut portions and fixing a cooling pipe to the projected strip grooves by the undercut portions. CONSTITUTION:A plurality of the undercut portions 10 of a projected strip groove 5 formed on an inner casing are integrally formed and a cooling pipe 4 is fitted to the projected strip groove 5 of the inner casing by the undercut portions 10. That is, the cooling pipe 4 is fitted to a plurality of the undercut portions 10 provided in the projected strip groove 5 from the projected strip groove 5 of the inner casing 2. Accordingly, the cooling pipe 4 does not separate from the projected strip groove 5 of the inner casing 2 even though the inner casing 2 is projected to be deformed toward a cold storage chamber and a performance can be guaranteed in any condition of use. Thus, a factor dependent on a work management requiring a complete seal is removed and an ice box with a high reliability can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a refrigerator in which a cooling pipe is provided on the back side of an inner box to form a heat exchanger.

[Conventional technology]

A conventional example will be explained using FIGS. 3 and 4.

1 is an outer box, and 2 is an inner box made of resin. A heat insulating material 3 is filled between the inner box 2 and the outer box 1 to constitute the refrigerator body. Reference numeral 4 denotes a cooling pipe of the refrigeration cycle, and the back surface 2 of the inner box 2 is installed in a plurality of protruding grooves 5 formed on the inner box 2.
After covering the entire area on the heat insulating material side with the aluminum adhesive tape 6, place the cooling pipe fixture 7 from outside the aluminum adhesive tape and attach the cooling pipes in one or two rows to the inner box 2 using the screws 8. It is what keeps the . Further, a seal 9 is provided on the screw attachment portion for the purpose of preventing absorption from the cooling pipe toward the heat insulating material side from the screw attachment portion. The purpose of the cooling pipe fixing device 7 is to fix the cooling pipe 4 to the protruding groove 5 of the inner box 2 with the aluminum adhesive tape 6, but the adhesive force of the aluminum adhesive tape 6 alone is insufficient to fix it, and it cannot be used for many years. Due to the cooling action of the cooling pipe 4, the fluorocarbon gas contained in the heat insulating material 3 is accumulated in the protruding groove 5 from the end of the aluminum adhesive tape 6, etc., and when the cooling operation is stopped for some reason, the fluorocarbon gas is As a result of the expanding force acting on the inner box 2, the inner box 2 is deformed in a protruding manner toward the cold room, centering on the protruding grooves of the inner box 2. This not only significantly damages the appearance, but also causes the cooling pipes 4 and the inner box 2 to separate. Since the cooling power decreases and the cooling becomes extremely poor, the cooling pipe fixing device 7 is designed to prevent the cooling pipe 4 from coming off from the protruding groove 5 of the inner box 2 even if the inner box 2 is deformed protrudingly. be.

[Problem to be solved by the invention]

However, in the above configuration, the cooling pipe fixture 7
Installation is done from two directions, from the back side and the front side of the inner box, which is not only very inefficient and causes high processing costs, but also because it is fixed with screw 8, which creates a hole in the inner box for the screw to pass through. It is necessary to apply a seal 9 for the purpose of preventing corrosion caused by moisture in the humid air inside the refrigerator being absorbed by the cooling pipe 4 extending from the hole, and it is also difficult to complete this seal 9. However, there have been problems with not only high cost but also reliability, such as instability due to reliance on work.

The present invention aims to provide an inexpensive structure, and also aims to provide a highly reliable refrigerator.

[Means to solve the problem]

In order to achieve the above object, a plurality of undercut portions are integrally formed in the protruding groove formed on the inner box, and the cooling pipe is fitted into the protruding groove of the inner box by means of the undercut portion. It is.

[Effect]

In the present invention, the inner box 2 is deformed to protrude toward the refrigerator compartment by fitting the cooling pipe 4 from the protruding groove 5 of the inner box 2 into a plurality of undercut portions 10 provided in the protruding groove 5. Also, the cooling pipe 4 does not separate from the protruding groove 5 of the inner box 2, and the performance can be guaranteed under any usage conditions.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

Any part of the protrusion groove 5 of the inner box 2, and in one example, 2 to 3 places, a narrow part C or D> with respect to the outer diameter of the cooling pipe 4.
A protruding portion 5'C5' is placed on the insulation material side so as to have the relationship C5'.
An undercut portion 10 having a 10 mm diameter is formed integrally with the inner box 2, and a cooling pipe 4 is fitted into the undercut portion 10 from the heat insulating side of the inner box 2 by utilizing the elasticity of the resin. A cooling pipe 4 is fixed to a protruding groove 5.

〔Effect of the invention〕

According to the present invention, the cooling pipes are fitted and fixed to the plurality of undercuts provided in the protruding grooves formed on the inner box, so that the inner box can be moved toward the refrigerator compartment side without using a cooling pipe fixing device. This has the effect that the cooling pipe does not separate from the protruding groove when it is protrudingly deformed, and performance can be guaranteed, and the work of installing the cooling pipe fixing device can be omitted. Further, there is no need for a threaded passage for attaching a cooling pipe fixture, and there is no need to rely on work management that requires a perfect seal, making it possible to provide a highly reliable refrigerator.

Part front view. FIG. 2 is a BB sectional view of FIG. 3. Figure 3 is a main sectional view of the refrigerator. FIG. 4 is an enlarged sectional view of section A of the construction drawing.

1...outer box, 2...Inner box.

3...insulation material, 4...Cooling pipe.

5... Projection groove, 6...Aluminum adhesive tape, 7...Cooling pipe fixture, 8...screw.

9...Seal, 10... Undercut part.

No. 7 figure No. figure No. figure Atsushi figure

Claims (1)

[Claims] 1. An inner box, an outer box, and a heat insulating material filled between the two boxes;
It consists of a cooling pipe arranged in a protruding groove formed in the inner box, undercuts are provided at a plurality of places in the protruding groove formed in the inner box, and the cooling pipe is arranged in a protruding groove formed in the inner box. A refrigerator that is fixed in a groove.