JP2002188880A - Flat showcase for refrigeration - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat showcase for refrigeration, in which a straightening effect for air-curtain let out of a cool air outlet is enhanced, suction holes are prevented from being clogged with frosting on the suction sheet to maintain an optimum air-curtain formation, thereby reduce the number of defrosting operations to one time a day, and the defrosting operation during business hours is eliminated, and frosting or softening of displayed commodities are prevented. SOLUTION: A plurality of outlet louvers 17 are arranged at a cool-air outlet 13 throughout the showcase width. A defroster 18 formed of latticed sheets is detachably placed in front of the louver. In a cool-air suction port 14, the upper part of an inlet sheet 8 is bent in a crank form, where the top row of suction holes is placed close to a side wall 2, and the corner part of the horizontal face is inclined lower than the chamber inside, so as to drop condensate easily in a circulation duct 9. An antisweat heater is mounted on the crank- shaped bent part in the upper part of the sheet 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a merchandise display portion formed in a box shape having an open top and having an outlet for blowing cold air toward one of the opposed side walls and the other for discharging the cool air to the other side wall. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerated flat showcase having suction inlets, and more particularly to a refrigerated flat showcase having improved cold air outlets and suction ports.

[0002]

2. Description of the Related Art In a self-service food store such as a supermarket, a display of frozen food or ice cream is used.
Flat frozen showcases with open tops are often used.

FIG. 7 shows an example of such a case. A frozen flat type showcase 31 is a box-shaped product display part whose upper part is open and whose four sides and bottom part are surrounded by side walls 32 and a bottom wall 33 of an integral foam panel structure. 34, and a pedestal portion 35 for holding the commodity display portion 34 at an appropriate height. In the pedestal portion 35, refrigerator component equipment (not shown) is stored.

[0004] A floor plate 36 on which the products in the product display section 34 are placed
A cooling air circulation duct 39 is formed at predetermined intervals between the bottom panel 33 and the bottom wall 33, and between the side wall 32 and the back plate 37 or the suction port plate 38 serving as an interior panel of the commodity display section 34. In the underfloor circulation duct, a main cooler 40 serving as a cooling main body is provided at a substantially central position, and a blower 4 is provided adjacent to the upstream side thereof.
1, and further upstream thereof, an auxiliary cooler 42 for assisting cooling is provided. Reference numeral 45 denotes a defrost heater of the main cooler 40, and 46a, 46b, and 46c defrost heaters attached to the auxiliary cooler 42, the drain pan, and the main cooler 40.

Both ends of the cool air circulation duct 39 communicate with a cool air outlet 43 on the back plate 37 side and a cool air inlet 44 on the inlet plate 38 side.
Has a grid-shaped rectifying plate 4 for forming an air curtain.
7 are formed over the entire width of the showcase, while the cold air inlets 44 are, as shown in detail in FIG.
A suction fence 48 is also attached to the upper part of the showcase over the entire width of the showcase. Immediately below the inlet fence 48, a defrost plate 49 is fixed to the lining of the side wall 32 and is attached over the entire width of the showcase.

[0006] The air in the circulation duct 39 cooled by the main cooler 40 and the auxiliary cooler 42 is supplied to the blower 4.
By the action of 1, after being blown out from the cool air outlet 33 into the product display portion 34 and maintaining the inside of the product display portion 34 at a predetermined cooling temperature, the cold air is sucked into the circulation duct 39 again from the cool air suction port 44 and circulated. The structure has been adopted.

[0007]

By the way, in such a frozen flat type showcase 31, defrosting is generally performed about two to four times a day. It hits the product in the section 34 and causes frost on the product surface. This frost is 12-13 after cooling
It can be completely removed over time, but defrost 2 to 3 times a day.
Since it is performed four times, there is a problem that the amount of frost on the product is not gradually removed and gradually increases. Further, if the defrost time is increased or the defrost temperature is increased in order to maintain the cooling performance of the showcase, there are problems such as an increase in the amount of frost and softening of the product.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to improve the rectifying effect of an air curtain by improving the structure of a cold air outlet portion and a suction port portion, and to improve the suction efficiency. The frost adheres to the upper part of the mouth plate as much as possible to prevent clogging of the suction port and to maintain the formation of the optimal air curtain as much as possible, thereby reducing the number of times of defrost per day to one An object of the present invention is to provide a frozen flat showcase that eliminates defrost and prevents frosting and softening of displayed products.

[0009]

In order to solve the above-mentioned problems, the present invention has a commodity display portion formed in a box shape with an open top, and cool air is supplied to one of the opposed side walls in the direction of the other side wall. In the refrigerated flat showcase having a blow-out port and a suction port for sucking those cool air on the other side, a plurality of long blow-off louvers over the entire width of the showcase are arranged in the cool-air blowout port, In addition, a straightening plate (highlight louver) is detachably attached to the front from a lattice-like plate material. With these two rectifying plates, the rectifying effect of the air curtain can be further enhanced as compared with a conventional grid-shaped rectifying plate.

In addition, the present invention provides a plurality of suction holes arranged in a plurality of rows in the vertical direction over the entire width of the showcase in the upper part of the suction port plate forming the cool air circulation duct with the side wall. The uppermost row of the suction holes is arranged closer to the side wall side than the other rows, so that it is not necessary to separately attach a suction port fence separate from the suction port plate to the cold air suction port. Disappeared, making assembly easier.

Further, according to the present invention, the upper portion of the suction port plate disposed close to the side wall is formed by bending the uppermost row of the suction holes into a crank shape close to the side wall. The horizontal surface is formed so as to be inclined so that the side wall side is located lower than the inside of the refrigerator, and a dew-proof heater is attached to a crank-shaped bent portion above the suction port plate. This makes it difficult for frost to adhere to the vicinity of the suction hole at the top of the suction port plate due to the heat of the dew-proof heater, and the melted frost falls into the circulation duct from the inclined crank-shaped bent portion as dew. . Therefore, the suction holes are not clogged and the formation of the air curtain is not hindered.

Further, according to the present invention, a defrost heater is provided upstream of an auxiliary cooler below a suction port in a cool air circulation duct between a side wall on a suction port side and a suction port plate. A defrosting plate provided with a large number of holes is provided in the vicinity of the upstream side in close proximity to this. As a result, frost adhering to the defrost plate and dew falling from above and adhering to the defrost plate are removed as much as possible by the heat of the defrost heater arranged in the vicinity.

[0013]

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional side view of a freezing flat showcase of the present invention, FIG. 2 is an enlarged cross-sectional side view of a cold air outlet portion, FIG. 3 is an enlarged cross-sectional side view of a cold air suction port portion, and FIG. FIG. 5 is a perspective side view, FIG. 5 is an enlarged sectional side view near the defrost plate below the cold air suction port, and FIG. 6 is a perspective view of the defrost plate.

As shown in FIG. 1, a frozen flat-type showcase 1 of the present invention has a box-shaped product display section in which an upper part is open and four sides and a bottom part are surrounded by side walls 2 and a bottom wall 3 having an integral foam panel structure. 4
And a pedestal portion 5 for holding the product display portion 4 at an appropriate height. In the pedestal portion 5, refrigerator component equipment (not shown) is housed.

A predetermined space is provided between the floor plate 6 and the bottom wall 3 on which the products in the product display unit 4 are placed, and between the back plate 7 and the suction plate 8 serving as the interior panel of the product display unit 4 and the side wall 2. A cooling air circulation duct 9 is formed. In addition, product display section 4
In the underfloor circulating duct 9, a main cooler 10 serving as a main body of cooling is disposed substantially at a central position, and a blower 11 is disposed adjacent to an upstream side thereof. A vessel 12 is provided. Both ends of the circulation duct 9 in the front-back direction of the showcase are provided with the cool air outlets 13 on the back plate 7 side.
And the cold air suction port 14 on the suction port plate 8 side. In addition, 15 is a defrost heater of the main cooler 10, 16a, 16
b, 16c are the auxiliary cooler 12, the drain pan, and the main cooler 1
This is the defrost heater attached before 0.

The refrigerated flat showcase 1 constructed as described above has a cooling air circulation structure substantially similar to that of the conventional showcase described above. That is, the air in the circulation duct 9 cooled by the main cooler 10 and the auxiliary cooler 12 is blown out from the cool air outlet 13 into the product display unit 4 by the action of the blower 11, and the inside of the product display unit 4 is predetermined. After being kept at the cooling temperature, the air is again sucked into the circulation duct 9 from the cold air suction port 14 and circulated.

As shown in detail in FIG. 2, a plurality of air outlet louvers 17 which are long rectangular V-shaped straightening plates extending over the entire width of the showcase are arranged in the cold air outlet 13. . A highlight louver 18, which is a rectifying plate made of a grid-like plate, is detachably mounted in front of the louver. This highlight louver 18
Specifically, it is fitted and attached between a concave portion of the louver upper pressing plate 19a attached to the lower surface of the outlet nosing and a concave portion of the louver lower pressing plate 19b attached to the top of the back plate 7. With these two louvers (the outlet louver 17 and the highlight louver 18), the rectifying effect of the air curtain can be enhanced as compared with a conventional grid-shaped rectifying plate.

On the other hand, as shown in detail in FIGS. 3 and 4, the cold air suction port 14 is formed by bending the upper portion of the suction port plate 8 in a crank shape toward the side wall 2 and providing the upper portion with the entire width in the showcase width direction. And a large number of suction holes 8a,
8b and 8c are arranged. The substantially horizontal surface (the surface on which the suction hole 8b is formed) of the crank-shaped bent portion is formed so as to be inclined such that the side wall 2 side is lower than the inside of the refrigerator. Further, at the crank-shaped bent portion above the suction port plate 8, dew-proof heaters 20a and 20b made of incandescent wires or the like are attached at desired positions on the duct side surface. As a result, frost hardly adheres to the vicinity of the suction holes 8a, 8b, 8c in the upper portion of the suction port plate 8, and even if frost adheres, the defrost prevention heater 2
It can be melted by Oa and 20b and dropped into the circulation duct from the inclined crank-shaped bent portion. Therefore, clogging of the suction holes 8a, 8b, 8c can be prevented, and formation of an optimal air curtain can be maintained.

The circulation duct 9 below the cool air suction port 14
Inside, a defrost heater 16a is provided near the upstream side of the auxiliary cooler 12 below the suction port, and further, at a position near this upstream side, a defrosting plate 21 is fixed to the lining of the side wall 2 and extends over the entire width of the showcase. It is provided. As shown in FIG. 6, the defrosting plate 21 has a large number of punching holes 2.
1a is drilled. The dew which has fallen into the circulation duct 9 from the crank-shaped bent portion of the suction port plate 8 having the cool air suction port 14 hits the defrost plate 21. The defrost plate 21 is heated by the heat of the nearby defrost heater 16a. Therefore, no frost is generated here and the circulation of cool air is not hindered. The drain collected at the bottom of the showcase is discharged to the outside through a drain drain hole below the blower.

[0020]

As described above, according to the refrigerated flat type showcase of the present invention, the rectifying effect of the air curtain can be enhanced, and adhesion of frost to the upper portion of the suction port plate can be suppressed as much as possible. To prevent the clogging of the product and maintain the formation of the optimal air curtain as much as possible, thereby reducing the number of defrosts per day to one, eliminating defrosting during operation, and preventing frosting and softening of displayed products. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view of a frozen flat showcase of the present invention.

FIG. 2 is an enlarged sectional side view of a cool air outlet.

FIG. 3 is an enlarged cross-sectional side view of a cool air suction port.

FIG. 4 is a perspective view of a suction port plate.

FIG. 5 is an enlarged cross-sectional side view of the vicinity of a defrost plate below the cold air suction port.

FIG. 6 is a perspective view of a defrost plate below the cold air suction port.

FIG. 7 is a cross-sectional side view of a conventional frozen flat type showcase.

FIG. 8 is an enlarged sectional side view of a conventional cool air suction port.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Freezing flat type showcase 2 Side wall 3 Low wall 4 Commodity display part 5 Base part 6 Floor plate 7 Back plate 8 Suction port plate 8a, 8b, 8c Suction hole 9 Cool air circulation duct 10 Main cooler 11 Blower 12 Auxiliary cooler 13 Cool air Outlet 14 Cold air inlet 15 Defrost heater 16a, 16b, 16c of main cooler 10 Defrost heater 17 Outlet louver 18 Highlight louver 19a Upper louver holding plate 19b Lower louver holding plate 20a, 20b Dew prevention heater 21 Defrosting plate 21a Punching hole

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Koji Kasakawa 2-15-4 Shibaura, Minato-ku, Tokyo Nakano Refrigerator Co., Ltd. F-term (reference) 3B110 AA11 BA05 BA08

Claims (4)

[Claims] 1. A refrigerating flat type having a commodity display portion formed in a box shape with an open top, having an outlet for blowing cold air toward one of the opposite side walls, and a cold air suction port on the other side. In the showcase, a plurality of long outlet louvers over the entire width of the showcase are arranged in a row at the outlet of the cool air, and a straightening plate made of a grid-like plate material is detachably attached in front of the outlet louvers. A frozen flat type showcase. 2. A large number of suction pipes extending in the vertical direction over the entire width in the showcase width, above the suction port plate forming a cold air circulation duct with the side wall at the suction port of the cool air. 2. The refrigerated flat showcase according to claim 1, wherein the holes are arranged, and the uppermost row of the suction holes is arranged closer to the side wall side than the other rows. 3. An upper portion of the suction port plate disposed closer to the side wall side, the uppermost row of the suction holes is bent and formed in a crank shape close to the side wall, and the crank-shaped bent portion has a substantially horizontal direction. 3. The surface of claim 2, wherein the side wall side is formed so as to be inclined so as to be lower than the inside of the storage, and a dew-proof heater is attached to the crank-shaped bent portion above the suction port plate. The described frozen flat showcase. 4. A defrost heater is provided in the cool air circulation duct between the side wall on the suction port side and the suction port plate near an upstream side of an auxiliary cooler below the suction port. 4. A freezing flat showcase according to claim 1, wherein a defrosting plate having a number of punching holes is provided near the upstream side.