JPS61202068A - Refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a direct cooling type refrigerator.

Conventional technology Conventionally, in direct cooling type refrigerators, the cooling pipe used as an evaporator is bent in a meandering pattern and is placed on the side of the insulation material on the wall of the inner box.
Consideration has been given to obtaining a wide cooling surface.

An example of the conventional refrigerator mentioned above will be described below with reference to the drawings. FIG. 4 shows the arrangement of cooling pipes, and FIG. 6 is a sectional view of the refrigerator body. 1 is the refrigerator itself,
2 is an outer box, 3 is an inner box, and the refrigerator main body 1 is constructed by filling a heat insulating material 4 between the inner box 3 and the outer box 2. Reference numeral 6 denotes a partition wall that divides the inner box 3 into a freezing compartment 6 and a refrigerating compartment 7. Said freezer compartment6. The refrigerator compartment 7 is equipped with a refrigerator compartment cooling pipe 8 and a freezer compartment cooling pipe 9, which are provided separately and facing each other. Freezer compartment cooling pipes 9 are connected to form one refrigerant distribution circuit. In this configuration, the operation of the compressor 10 is controlled by detecting the temperature of the refrigerator compartment cooling pipe 8 using the temperature sensing section 11. Furthermore, when the compressor 1o is in operation, cooling is performed by forcibly circulating refrigerant through the cooling pipes, but frost forms on the inner box surface 3a of the refrigerator compartment where the cooling pipes are disposed.

When a predetermined internal temperature is reached, the compressor 10 is stopped by the temperature regulator 12. At the same time as the compressor 10 stops, the defrosting heater 13 (OFF energization heater) of the refrigerator compartment 7 is energized to defrost the inner box surface 3a of the refrigerator compartment 7.

Problems to be Solved by the Invention However, in the above configuration, when the compressor 10 is stopped, a large amount of the relatively low temperature refrigerant in the cooling pipe 9 of the freezer compartment 6 flows back into the refrigerator compartment cooling pipe 8, and the refrigerator compartment Only the inner box on the inner box surface 3a of No. 7, especially the outlet section 8b of the refrigerator cooling pipe, is supercooled and the defrosting action is inhibited, so frost remains and the cooling operation continues.
If this phenomenon occurs repeatedly, the frost will grow large, which is a quality problem.

In view of the above problems, the present invention prevents refrigerant backflow when the compressor is stopped, prevents local frost residue, and performs a normal cooling cycle.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a cooling pipe arranged on the heat insulating material side of the inner box, in which a thermally poor conductor is placed around the outlet cooling pipe of the refrigerator compartment cooling pipe. A heat insulating member is wound around it.

Effect of the Invention With the above-described configuration, the present invention prevents local overcooling of the inner box wall surface in contact with the outlet portion of the refrigerator compartment cooling pipe when the compressor is stopped, and prevents frost formation on the inner box wall surface. .

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

This will be explained with reference to FIG.

1 is the refrigerator body, 2 is the outer box, 3 is the inner box, 4 is the insulation material,
5 is a partition wall, 8 is a refrigerator compartment cooling pipe, 9 is a freezer compartment cooling pipe,
12 is the temperature controller body, 11 is the heat sensitive part, 13 is the electric heater, 6 is the freezer compartment, 7 is the refrigerator compartment, 1o is the compressor, and the above is as follows:
Since the structure is the same as that of the conventional example shown in FIGS. 4 and 5, detailed explanation thereof will be omitted.

The refrigerant flows from the inlet side 8a of the refrigerator compartment cooling pipe 8 and is connected to the freezer compartment cooling pipe 9 at the refrigerator compartment cooling pipe outlet 8b. A heat insulating member 14 made of a thermally poor conductor shown in the figure is wrapped to prevent overcooling of the wall surface of the inner box adjacent to the outlet portion 8b of the cooling pipe of the refrigerator compartment, thereby preventing frost formation on the wall surface of the inner box.

Therefore, by wrapping a heat insulating member made of a thermally poor conductor around the outlet of the refrigerator cooling pipe, frost formation on the surface of the inner box adjacent to the origin of the refrigerator cooling pipe is prevented. Compared to the case where it is simply installed inside the insulation material filled between the inner box and the outer box, the distance from the outer wall of the inner box is uniform, so abnormalities such as frost residue do not occur, and Since the cooling power applied to the inside of the refrigerator by the outlet of the refrigerator cooling pipe that contacts the thermally poor conductor insulation member is extremely small, the cooling power is not lost and the effect is great.

Effects of the Invention As described above, the present invention can prevent frost formation on the surface of the inner box adjacent to the outlet of the cooling pipe of the refrigerator by wrapping a heat insulating member of a thermally poor conductor around the outlet of the cooling pipe of the refrigerator. .

[Brief explanation of drawings]

Fig. 1 is a sectional view of the outlet section of the cooling pipe in the refrigerator compartment in one embodiment of the present invention, Fig. 2 is a perspective view of the inner box as seen from the back side, and Fig.
The figure is a sectional view of a refrigerator using the inner box of FIG. 2, FIG. 4 is a perspective view of a conventional inner box, and FIG. 5 is a sectional view of a refrigerator using the inner box of FIG. 4. 1...refrigerator body, 2...outer box, 3.
...Inner box, 4...Insulation material, 6...
Inner partition wall, 6... Freezer room, 7... Refrigerator room, 8... Refrigerator room cooling pipe, 9... Freezer room cooling pipe, 14. ...Insulation member. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 4
Figure 5

Claims (1)

[Claims] an outer box, an inner box, a heat insulating material filled between the two boxes, a partition wall that partitions the inside of the inner box into a freezer compartment and a refrigerator compartment, and an inner box that configures the freezer compartment and the refrigerator compartment. The refrigerator has a freezer cooling pipe and a refrigerator cooling pipe installed respectively, and piping is provided to flow refrigerant from the refrigerator cooling pipe to the freezer cooling pipe, and a heat insulating member is installed at the outlet of the refrigerator cooling pipe. Features a refrigerator.