JPH059712B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a low-temperature show case that is provided with a storage chamber and a stock chamber, and in which both chambers are cooled by forced circulation of cold air.

(b) Prior art The specification of U.S. Patent No. 2,635,434 and the attached drawings include:
A storage chamber that is cooled by a low-temperature air curtain formed in the opening, and a storage chamber that is formed directly below the storage chamber and is cooled by return cold air that forms the low-temperature air curtain and returns to the evaporator, and has a lid on the front. A cryogenic case with a storage compartment is shown.

In such a configuration, since the evaporator is located at the rear of the stock chamber, the disadvantages listed below arise.

Since the cold air that returns to the evaporator passes through the center of the stock chamber, when a large amount of products are stored in the stock chamber, the flow of the returned cold air is obstructed by the stock products, impeding heat exchange in the evaporator.

When the lid is opened, the outside air that has entered the stock chamber directly flows into the evaporator, causing extreme frosting on the evaporator and reducing the flow rate of the low-temperature air curtain.

(c) Purpose of the invention The purpose of the present invention is to solve the drawbacks of the prior art.

(d) Structure of the invention A storage chamber cooled by a low-temperature air curtain formed in an opening, and a storage chamber formed directly below this storage chamber, forming the low-temperature air curtain and returning to an evaporator arranged at the rear of the storage chamber. a storage chamber that is cooled by return cold air and has a lid on the front; a cold air that is disposed above the front of the storage chamber and that causes the return cold air to flow along the back surface of the bottom plate of the storage chamber and directly return to the evaporator; A low-temperature show case comprising a wind direction plate that directs the cold air downward and cools the stocked products.

(E) Embodiments of the Invention Below, embodiments of the present invention will be described based on the drawings. 1 is a plurality of connected units whose main body is composed of a heat insulating wall 3 having an opening 2 for storing and taking out products on the front side. This is an open-type low-temperature show case that can be used as an exhibition room equipped with shelves 7 and fluorescent lights 8 by arranging a top plate 4, a back plate 5, and a removable bottom plate 6 at an appropriate distance from the inner wall of the insulating wall. storage room 9, and a drawer 1 located directly below this storage room that can be taken out and put in freely.
A flame is formed between the stock chamber 11 that stores 0. Reference numeral 12 denotes a first passage for circulating cold air that surrounds the storage chamber, in which an evaporator 13 is disposed behind the back plate, an air blower 14 is disposed directly above the evaporator, and an air outlet 1 is provided.
5 is formed along the upper end of the opening 2, and a suction port 16 is formed along the lower end of the opening. 17 is a second passage for protective air circulation that surrounds the storage chamber 9 similarly to the first passage; a blower 18 is disposed at the same height as the blower 14 in the first passage; Suction ports 20 are arranged on the outside of the air outlet 15 of one passage and along the outside of the suction port 16 of the first passage. Both the first and second passages are provided with a heat insulating wall 3.
It is formed by arranging a partition top plate 21, a partition back plate 22, and a lower duct 23 between the top plate 4, the back plate 5, and the bottom plate 6. The lower duct is the second
It defines the lower area of the passage 17, crosses the upper part of the stock chamber 11, that is, the lower area of the first passage 12 in the front-rear direction, is inclined backwardly, and is arranged so as to be spaced from the bottom plate 6 by a distance L. , its front end is the first
The second passage 1 crosses directly below the suction port 16 of the passage 12.
7, and the rear end is connected to the second passage 17.
It communicates with the dorsal area of the body.

In the first passage, the cold air heat-exchanged in the evaporator 13 is made into a forced circulation flow by the blower 14.
The opening 2 is circulated as shown in the figure and the arrow in Figure 2.
A low-temperature air curtain CA is formed to cool the storage chamber 9, and at the same time, this low-temperature air curtain is formed to cool the stock chamber 11 with the return cold air that returns to the evaporator 13. The air inside the second passage 17 is made into a forced circulation flow by the blower 18, as shown by the arrows in FIGS. 1 and 2, and is added to the outside of the low-temperature air curtain CA at the opening. A protective air curtain GA is formed whose temperature is lower than that of the outside air due to the influence of the air curtain.

Reference numeral 24 denotes a wind direction plate which is inclined upwardly and downwardly at the front of the stock chamber 11 and is arranged parallel to both the above-mentioned suction ports, and its upper end is at a distance M from the bottom plate 6. , from the suction port 16 to the stock chamber 1
1, the return cold air guided upward is divided into cold air A flowing along the back surface of the bottom plate 6 and cold air L flowing toward the bottom of the stock chamber 11 and flowing along the upper part of the drawer 10, that is, along the stocked products 25.

The drawer has a container 27 equipped with a suitable number of small casters 26 rolling on the bottom wall of the insulating wall.
and an insulating lid 30 equipped with large casters 29 that roll on the installation surface of the low-temperature show case 1,
When stored in the stock chamber 11, the lid 30 also closes the opening 31 in the front wall of the heat insulating wall 3.

32 is a dew pan placed above the rear part of the stock chamber 11, and during defrosting, the evaporator 13 and the lower duct 2
It receives dew from the heat insulating wall 3 and guides this dew to a drain port 34 in the bottom wall of the heat insulating wall 3 through a hole 33 formed at the rear end. The rear part of the drawer 10 is located directly below this drip pan. In addition, 35 is a drain pipe.

According to such a configuration, the cold air circulating through the first passage 12 becomes a low-temperature air curtain CA at the opening 2 to cool the storage chamber 9, and is then guided to the stock chamber 11, and is directed to the rear surface of the bottom plate 6 by the wind direction plate 24. along the interval L
The cold air flows through the air and returns to the evaporator 13, and the cold air flows downward and cools the stock products 25 and returns to the evaporator 13.The forced circulation of cold air also flows into the storage compartment 9 and the stock. Both chambers 11 can be cooled, and the cold air flowing along the bottom plate 6 is directly returned to the evaporator 13 without being used to cool the stock products 25.
When the lid 30 is opened, even if outside air enters the stock chamber 11, it is possible to prevent the returned cold air from increasing in temperature significantly, and also to prevent the flow rate of the low temperature air curtain CA from decreasing. Extreme frosting can be avoided, and stock products 25 can be efficiently cooled by the cold air directed downward.

(F) Effects of the Invention Since the present invention is configured as described above, it achieves the effects listed below.

Both the store room and the stock room can be cooled simultaneously by forced circulation cold air.

The return cold air led to the stock room is divided by a wind direction plate, and one side is not used for cooling the stock products, but instead flows along the back of the bottom plate of the storage room.
When the lid is opened, a large temperature rise and extreme frosting of the cold air returned to the evaporator can be avoided, and a low-temperature air curtain can be formed well.

Since the return cold air guided to the stock chamber is divided by the wind direction plate and one side is directed downward, the stock products can be efficiently cooled by constantly applying cold air to the stock products.

[Brief explanation of drawings]

The drawings all show embodiments of the low-temperature show case of the present invention, and FIG. 1 is a sectional view taken along line AA' in FIG. 3, FIG. 2 is a sectional view taken along line B-B' in FIG. 3, and FIG. 3 is a front perspective view.
FIG. 4 is an enlarged view of FIG. 2C, and FIG. 5 is a perspective view of the main part. 2... Opening, 6... Bottom plate, 9... Storage chamber, 11... Stock chamber, 13... Evaporator, 24... Wind direction plate, 30...
Lid, CA...Low temperature air curtain.

Claims (1)

[Claims] 1 A storage room that is cooled by a low-temperature air curtain formed in the opening, and a storage room that is cooled by return cold air that is formed directly below this storage room and returns to the evaporator that forms the low-temperature air curtain and is located at the rear of the storage room. A storage chamber with a lid on the front, and a storage chamber disposed above the front of the storage chamber, the return cold air flowing along the back surface of the bottom plate of the storage chamber and the cold air directed downward to cool the stocked products. A low-temperature case equipped with a wind direction plate that separates cold air.