JPH0124545Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a natural convection type refrigerator, and particularly to a refrigerator that cools a plurality of individually divided items such as bottles and cans.

[Prior art]

Conventional refrigerators can be roughly divided into natural convection cooling type shown in Figure 1 and forced air cooling type shown in Figure 2, but both have a door 11 on the front and the evaporator 12 is an insulated box. It was provided on the top surface, the back surface, or both.

In the former natural convection cooling method, heat exchange in the plate-type evaporator 12 is performed by natural convection, so the flow of cold air is slow. The cooled air is cooled on both sides of the evaporator 12, and is rapidly cooled as it comes into contact with the falling cold air of the lowest temperature. However, the beverage container 14B placed on the entrance side of the insulating box 13 is
3, the flow speed of the cold air slows down in proportion to the number of beverage containers 14 housed in the container 3, the cold air comes into contact with the cold air whose temperature has risen slightly due to heat exchange with the beverage containers 14A, etc. on the back side, and the opening and closing of the door 11. Due to the fact that it is easily affected by heat, the time required for cooling becomes longer, and when the inlet side reaches the appropriate temperature, the beverage container on the back side becomes supercooled.

All of the beverage containers are number 14, but for convenience of explanation, the one on the farthest side will be called 14A and the one on the farthest entrance side will be called 14B.

In the latter forced air cooling method, a fan 16 is installed above the evaporator 15 to forcibly circulate the air inside the heat insulating box 13, so the difference in air temperature distribution is smaller than in the former method. It also has high cooling efficiency. However, this method has the drawback that there is a large difference in cooling temperature between the beverage container 14B on the inlet side and the other portions where the cold air 17 is directly exposed to, and the temperature varies depending on the position in the insulating box 13, and the fan 16 is required. Therefore, the structure is complicated and the cost is high.

[Purpose of invention]

The purpose of this invention is to reduce the cost by using a natural convection cooling method, increase the speed of cold air flowing inside the insulated box using the duct effect, and increase the cooling effect. To provide a refrigerator which has the same cooling performance on the entrance side and the back side of a heat insulating box by exposing a plurality of objects to be cooled inside the body to uniform cold air.

[Key points of the idea]

The refrigerator of the present invention is a refrigerator in which a plate-type evaporator for air cooling is provided on the back side of an insulated box body having a door on the front or from the back side to the top surface, and the insulating box surrounds at least a part of the plate-type evaporator. It is characterized by a duct plate that covers the back of the body and the floor and forms a cold air passage, with an intake port at the upper end of the duct plate and a cold air discharge port at the lower part of the entrance side of the refrigerator. There is.

[Example of idea]

The present invention will be explained below with reference to FIGS. 3 and 4 showing one embodiment. Note that the door 11, evaporator 12, and heat insulating box 13 are the same as those shown in FIG.

Inverted L-shaped plate type evaporator 12 and insulation box 1
There is a gap 2 between the back wall 21 of 3 and the ceiling 28.
2 is formed, and a back duct plate 24 is arranged on the front side of the plate type evaporator 12 so as to cover the entire width of the evaporator 12 while keeping an appropriate gap so that a B gap 23 is formed. . Note that both the A gap 22 and the B gap 23 are collectively referred to as a back duct. Maintaining the C gap 26 from the bottom 25 inside the heat insulating box 13,
A lower duct plate 27 is provided to form a lower duct, the rear end of the lower duct plate 27 is joined to the lower end of the inner duct plate 24, and the front end of the lower duct plate 27 is connected to the insulation box 13.
An appropriate space is opened from the front end of the container, and a large number of beverage containers 14 are placed on the upper part.

Further, openings 29 and 30 are formed between the upper end of the inner duct plate 24 and the evaporator 12 and between the lower duct plate 27 and the door 11, respectively. 31
is a refrigerator that sends refrigerant to the evaporator 12.

Next, the operation of the embodiment described above will be explained.

The air inside the heat insulating box 13 is supplied to a plate type evaporator 1.
The cold air from the upper surface of the ceiling of the evaporator 12 and the back side of the vertical part descends through the A gap 22, and also flows into the back duct 24 of the vertical part of the evaporator 12.
The cold air on the side descends through the B gap 23, and these cold airs meet below the back duct and then pass through the C gap 26, which is the lower duct, to the insulating box 13 from the opening 30.
Flow inside. This cold air first cools the beverage container 14B placed on the entrance side of the insulating box 13, and then gradually cools the inner part. The cold air cooled on the lower surface of the ceiling of the plate-type evaporator 12 directly descends into the refrigerator.
The beverage container 14 placed below is cooled. The air thus warmed by heat exchange with the beverage container 14 rises, and by repeating the above-described cycle, the beverage container 14 is gradually cooled.

FIG. 5 shows another embodiment of the present invention, and corresponds to FIG. 4 of the first embodiment described above. In this embodiment, no opening is formed at the tip of the lower duct plate 41, and the tip is almost in contact with the door 11.

Instead of the opening 30 of the first embodiment, a large number of holes 42 are provided from approximately the center of the lower duct plate 41 to the entrance side, and these holes 42 are used as openings. Therefore, the cold air flowing through the C gap 26, which is the lower duct, flows into the heat insulating box 13 from the opening 42. Note that although a beverage container is used as an example of the object to be cooled, the object is not limited to this, and any type may be used as long as it is a plurality of individually divided objects.

[Effect of idea]

As explained above, the refrigerator of the present invention encloses a part of the plate-type evaporator, covers the back and floor of the insulated box, and has openings at the top and bottom of the inlet side of the insulated box through which cool air flows. The structure was such that a formed duct plate was provided.

Therefore, since it uses a natural convection cooling method, there is no need for a fan, the structure is simple, and the cost is low. In addition, the cold air cooled on both sides of the plate-type evaporator descends within the duct plate surrounding the evaporator, but as it descends, it is further cooled by the evaporator, accelerating the rate of descent and effectively creating the so-called duct effect. . As a result, the convection speed of the cold air throughout the heat insulating box is accelerated and the cooling efficiency is improved.

The lowest temperature cold air is then blown out through the lower duct to the inlet side of the insulated box, which greatly improves the cooling performance of the beverage containers on the inlet side, which is far from the evaporator and is less likely to cool down due to the effects of opening and closing the door. will be improved. Furthermore, since the back duct is formed and prevents cold air from directly hitting the food container at the back from the evaporator at the back, the cooling rate is uniform on both the inlet and back sides of the insulated box, allowing for a large number of beverages. The temperature of the container is almost uniform.

Therefore, it is no longer necessary for restaurants to serve drinks from the back side beverage containers first, and it is easier to use because drinks are served sequentially from the entrance side where it is easier to take out.In addition, the lower duct and back duct are provided on the inside of the refrigerator. Therefore, if it is provided in a removable manner, it has many advantages such as being able to easily clean every corner of the refrigerator, including the inside of the duct.

[Brief explanation of the drawing]

Figures 1 and 2 are sectional views of conventional examples with different shapes, Figures 3 and 4 show an embodiment of the present invention, Figure 3 is a sectional view, and Figure 4 is a part of Figure 3. A perspective view, FIG. 5, is a perspective view corresponding to FIG. 4 in another embodiment of the present invention. 11...Door, 12...Evaporator, 13...Insulation box, 24...Back duct plate, 27...Lower duct plate,
29, 30...opening.

Claims (1)

[Scope of utility model registration request] In a refrigerator in which a plate-type evaporator for air cooling is provided on the back surface of an insulated box body having a door on the front or from the back surface to the top surface, at least a part of the plate-type evaporator is enclosed, and a This cold air natural convection type refrigerator is provided with a duct plate that covers the back and floor surfaces and forms a cold air passage, and has an intake port at the upper end of the duct plate and a cold air discharge port at the lower part of the entrance side of the refrigerator.