JPH0248790Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a closed show case, and more particularly to a closed show case in which a storage chamber made of a wall made of a thermally conductive material is provided and an air circulation path is formed between the wall and the external insulating wall. It is something.

[Prior art]

In order to store products such as Western sweets in a closed storage case without losing their freshness, it is necessary not only to maintain the appropriate temperature but also to prevent them from drying out. The simplest way to prevent drying is to seal the product in a transparent container or bag, but this cannot be used in the case of a show case because water droplets from the moisture evaporated from the product will adhere to the inner surface of the container when it is cooled. In order to solve this problem, a storage chamber made of a wall of a thermally conductive material is provided, an air circulation path is formed between it and the external insulation wall, and a fine coil and a A refrigeration mechanism equipped with an air circulation fan has been proposed (Japanese Patent Application Laid-Open No. 115867-1983).

By the way, in a closed case,
It may be necessary to open the two sliding doors on the back relatively frequently in order to take out stored products or replenish products. On the other hand, in the conventional configuration described above, the heat conduction of the thermally conductive walls of the storage room is not very large, or rather, it is not made large, so once warm air enters, it will take a long time until the temperature approaches the appropriate temperature. This is not desirable because it takes time and in some cases may impair the quality of the product.

[Purpose of invention]

Therefore, the purpose of the present invention is to create a closed case with a storage room as described above, in which the indoor temperature approaches the appropriate temperature relatively quickly even when the door is opened and warm air is let in. The aim is to obtain a closed case with

[Structure of the idea]

In order to achieve the above object, the present invention cools the inside of the storage room without reducing the humidity.

According to the present invention, an air circulation path is formed between a storage chamber having a wall made of a thermally conductive material and an external heat insulating wall surrounding the storage chamber, and a partition plate constitutes an upper wall of the storage chamber. In a case that includes an evaporator formed by arranging a plurality of heat radiating fins in parallel in an upper air circulation path and a blower for air circulation, the heat radiating fins of the evaporator are placed below the partition plate in the upper part of the storage chamber. There is obtained a closed show case characterized in that a storage chamber heat dissipation fin configured by extending up to 100 mm is provided, and a dew pan is further provided below the storage chamber heat dissipation fin.

〔Example〕

Figures 1A and 1B are front sectional views and side sectional views of an embodiment of the present invention, respectively, where 1a is an upper and lower insulating wall, 1b is a left and right insulating wall, and 2 is an insulating wall. Glass (with air space), 3
is an insulating sliding door, 4 is a storage room, 5 is a glass plate with good thermal conductivity (film may be used), 6 is a sliding door with good thermal conductivity,
7 is a display shelf, 8 is an evaporator, 8a is a refrigerant pipe,
Reference numeral 8b indicates a heat dissipation fin for the main body, 8c indicates a heat dissipation fin for the storage interior, 9 indicates a blower, 10 indicates a fan duct, 11 indicates an air circulation path, and 12 partially serves as a dew pan and has several holes (not shown). The partition plate 13 is an inclined dew pan, and 14 is a fold for functioning as a dew pan. The defrost water discharge mechanism is omitted. Note that the temperature controller may be placed either inside or outside the storage chamber 4, but if it is placed inside, the operation time of the refrigerator (not shown) will be excessive; if it is placed outside, the operating time will be shortened, but it will not reach the specified low temperature of the storage chamber 4. The time required to approach each other is large.

FIG. 2 is a perspective view showing the outline of the above-mentioned evaporator 8 and its surrounding structure, with a heat dissipation fin 8b of the evaporator main body at the upper part and a storage room heat dissipation fin 8c at the lower part (broken line) with the partition plate 12 in between. ) is provided.

FIG. 3 is a perspective view showing only the evaporator 8 of the configuration shown in FIG. There is. A large number of the stepped portions 8d are welded or brazed to form a single plate, and have the same function as the partition plate 12. The heat dissipation fins of the evaporator are usually made of aluminum.

In the closed show case having the above configuration, the evaporator 8a in the air circulation path 11
The blower 9 not only cools the storage chamber 4 from the outside by forcibly circulating the air in the air circulation path, but also cools the storage chamber 4 using the storage chamber fins 8c.
It descends along the slope of No. 3, cooling the room through natural convection. At this time, moisture is taken away from the item and adheres to the heat radiation fins 8c, but when this adhered dew accumulates to a certain extent, it drips onto the dew receiving tray 13 below. The defrosting water (which does not freeze here) collected in the dew pan 13 provides moisture to the cold air according to its temperature. The items in the storage room therefore never dry out. In this case, the cold air moves through the room by natural convection, so the amount of moisture taken away from the items is relatively small.

FIG. 4 is a sectional view showing the structure of the heat dissipation fin in another embodiment of the present invention, in which the main body heat dissipation fin 8b and the storage heat dissipation fin 8c are integrated on the same plane, and there are many partition plates. It is constructed by welding or brazing the pieces 8e between the heat radiation fins. Its function is substantially the same as in FIG.

In the above embodiment, the side wall of the storage chamber 4 uses the side heat insulating wall 1b as it is, but it is also possible to use an independent wall with good thermal conductivity and use the space between it and the outer enclosure as an air circulation path. . However, the cooling from the outside of the storage chamber does not need to be so strong and the effective space is reduced, so the structure of the previous embodiment is practically sufficient. Further, the direction of inclination of the dew pan 13 may be either forward or backward, or may be horizontal.

[Effect of idea]

As explained above, in order to cool the products in the storage room 4 without water deprivation, in this closed show case, not only indirect cooling is performed through the walls of the storage room, but also a cooling source and a moisture source are provided inside the storage room. It is designed to be directly cooled. Therefore, even if warm air enters the storage room 4 by temporarily opening the sliding doors 3 and 6 to take in and take out products, the indoor temperature quickly approaches the specified temperature, which only reduces the deterioration in product quality. Instead, if the temperature controller is installed in the storage room, the refrigerator stop signal will be issued earlier by the time saved, which will also help save energy.

[Brief explanation of the drawing]

Figures 1A and 1B are front and side cross-sectional views, respectively, of a closed show case that is an embodiment of the present invention, and Figure 2 is an overview of the evaporator and its surrounding configuration used in the above show case. FIG. 3 is a perspective view showing only the evaporator of the configuration shown in FIG. be. Explanation of symbols: 1a and 1b are insulated walls, 2 is insulated glass with air space, 3 is insulated sliding door, 4 is storage room,
5 is a glass plate, 6 is a sliding door, 7 is a display shelf, 8a is a refrigerant pipe, 8b is a heat radiation fin of the evaporator body,
8c is a storage room heat dissipation fin, 8d is a step, 9 is a blower, 10 is a fan duct, 11 is an air circulation path,
Reference numeral 12 represents a partition plate that partially serves as a dew pan, 13 represents an inclined dew pan, and 14 represents a pleat.

Claims (1)

[Scope of utility model registration request] An air circulation path is formed between a storage chamber having a wall of a thermally conductive material and an external heat insulating wall surrounding the storage chamber, and an air circulation path is formed in the upper part of a partition plate constituting the upper wall of the storage chamber. In a show case provided with an evaporator formed by arranging a plurality of heat dissipation fins in parallel and a blower for air circulation, the heat dissipation fins of the evaporator are extended below the partition plate in the upper part of the storage chamber. What is claimed is: 1. A closed show case characterized in that a storage room heat dissipation fin is provided, and a dew pan is further provided below the storage room heat dissipation fin.