JPS61134561A - 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 [Technical Field of the Invention] The present invention relates to a refrigerator that cools a cooling chamber using a combination of circulating air by a first cooler and direct cooling by a second cooler.

[Technical background of the invention]

Conventionally, in this type of refrigerator, the surface temperature of the direct cooling cooler is 2 to 3 degrees Celsius higher than that of the circulating air to prevent frost from forming on the food placement surface of the cooler. The side surfaces are covered with a cold storage agent or a cover to prevent heat exchange with the air and prevent frost formation.

[Problems with background technology]

However, in this conventional configuration, the cost is very high because the cool storage agent or cover is installed separately, and there is also a need to prevent water from entering between the cooler and the cool storage agent or cover. The seal structure is also complicated, which has the disadvantage of further increasing costs.

(Object of the Invention) The present invention has been made in view of the above circumstances, and its object is to provide a refrigerator that can prevent frost formation on the non-cooled surface of a direct cooling refrigerator at a low cost. It is in.

[Summary of the invention]

In order to achieve the above object, the present invention provides a second
The second cooler is located at the bottom of the cooling chamber, and a heat insulating material is provided on the non-heat exchange surface side of the second cooler.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a refrigerator body formed by foaming and filling a heat insulating material 4 such as urethane resin between an outer box 2 and an inner box 3, and the middle of this is partitioned into upper and lower parts by a partition wall 5, which will be described later.
As a result, the upper part of the refrigerator main body 1 serves as a freezing compartment 6 serving as a cooling room, and the lower part serves as a refrigerating compartment 7. Reference numeral 8 denotes a partition plate that partitions the deep part of the freezer compartment 6 into front and rear parts, and a 77 fan 9 for circulating cold air is mounted opposite to the upper end of this partition plate.
A cooler 10 is provided. Reference numeral 11 denotes a partition plate disposed in front of the partition plate 8. A cold air ventilation path 12 is provided between this and the partition plate 8, and the air from the fan 9 is directed into the freezer compartment 6 at the top of the partition plate 11. An air outlet 13 is provided to blow air directly to the air.

Now, below, the above-mentioned partition wall 5 will be explained in detail while also referring to FIGS. 2 to 6. That is, a rectangular opening 1 is provided in a portion of the inner box 3 corresponding to the bottom of the freezer compartment 6.
4 is preformed. 15 is frozen! This is a plastic bottom plate installed at the bottom of the main frame 16, which is made up of a main frame 16 having a ventilation hole 16a and a rear frame 17 connected to the rear end of the main frame 16, with the opening part between them being The opening 1
4, and a flange portion 18 having a groove portion 18a as shown in FIGS. 2 and 5 is formed integrally extending from the inner peripheral edge of the opening.

19 is a partition made of styrofoam resin, 20
is a cover also made of expanded polystyrene resin, and these are combined and integrated with each other as shown in FIGS. 3 and 6. Air passages 21, 22, and 23 are formed between the partition body 19 and the cover 20, respectively. 16a, and the rear end portion thereof is communicated with the cold air ventilation path 12,
Further, the air passage 23 has a front end communicating with the refrigerator compartment 7 and a rear end communicating with the cold air ventilation path 12. moreover,
A recess 24 is formed on the upper surface of the partition 19 and extends to the left and right side surfaces of the partition 9 so as to substantially correspond to the opening 14 of the inner box 3 . Now, 25 is a direct cooling type second cooler having a rectangular plate shape, and this is a rectangular cooling plate 26.
A meandering refrigerant pipe 27 is attached to the back surface of the second cooler 25, and the peripheral edge of the second cooler 25 is fitted into the groove 18a of the bottom plate 15 as shown in FIG. Bottom plate 1
It is provided so as to close the opening portion of 5. However,
When the integrated bottom plate 15 and first cooler 25 are set in a predetermined position before filling the heat insulating material 4 with foam, the back surface of the first cooler 25, which is the heat exchange surface, is the inner box 3. It corresponds to the four parts 24 of the partition body 19 through the opening 14, and thus the second cooler 25 and the partition body 1
A space is formed between the two. Therefore, when the heat insulating material 4 is foamed and filled in this state, the heat insulating material 4 wraps around into the recess 87I24 from the left and right of the partition body 19 and fills the space between the first cooler 25 and the partition body 19 described above. The heat insulating material 4 comes to be in close contact with the back surface of the first cooler 25. Incidentally, 19a and 20a are protrusions that protrude so as to be located in the air passages 21, 22 and 23, respectively, and these prevent deformation of the partition body 19 and cover 20 due to foaming pressure when filling the insulation material 4 with foam. Prevented. In addition, at the time of foam filling, since the peripheral edge of the first cooler 25 is fitted into the groove 18a of the bottom plate 15, sealing of the heat insulating material 4 is unnecessary.

According to the above configuration, since the heat insulating material 4 is provided in close contact with the back surface, which is the non-heat exchange surface, of the second cooler 25,
There is no frost formation on the bottom surface of the second cooler 25, and the cost is significantly reduced compared to the conventional case where a cold storage agent and cover are installed separately, and there is no need to seal against water. It is unnecessary, the production is extremely simple, there is no risk of frost formation, and it can be produced at a very low cost.

In the above embodiment, an example was shown in which the inner box 3 integrally had parts corresponding to the freezer compartment 6 and the refrigerator compartment 7, but it is also possible to form a structure in which each of the above parts is formed by a separate inner box. Also good.

〔Effect of the invention〕

As the invention is clear from the above description.

Since the heat insulating material is provided on the non-heat exchange surface side of the direct cooling cooler, it has practical effects of reliably preventing frost formation and being able to be manufactured at low cost.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view of the whole, Fig. 2 is a longitudinal sectional view of the main part, and Fig. 3 is an exploded view of the main part before foam filling of the insulation material. 4 is a perspective view of the bottom plate and the second cooler, and FIG. 5 is a perspective view of the bottom plate and the second cooler.
6 is a sectional view taken along the line Vl--Vl in FIG. 3. FIG. In the drawing, 1 is the refrigerator main body, 5 is a partition wall, 6 is a refrigerator (cooler), 7 is a refrigerator compartment, 9 is a fan, 10 is a first cooler, 15 is a bottom plate, 1 is a partition body, 20 25 indicates a cover, and 25 indicates a second cooler. l1Il Zukyoku 2 [2 Ends 3 Figures] Figure 4 Figure 5

Claims (1)

[Claims] 1. A first cooler installed in the circulation path that circulates the air in the cooling room cools the circulating air, and a second cooler for direct cooling is installed at the bottom of the cooling room. The refrigerator characterized in that a heat insulating material is provided on the non-heat exchange surface side of the second cooler.