JP3128497B2 - Showcase - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge side duct plate having a discharge port formed at an upper end, a suction side duct plate having a suction port formed at an upper end, and a plurality of sheets disposed between lower ends of these duct plates. The present invention relates to a low-temperature showcase in which a duct is formed inside a heat insulating wall by an installed bottom plate, and a cooler is installed in a duct below the bottom plate.

[0002]

2. Description of the Related Art Conventionally, a low-temperature showcase of this type has a discharge-side duct in which a discharge port is formed at an upper end inside a heat insulating wall, as shown in, for example, Japanese Patent Publication No. 5-1970 (A47F3 / 04). A plate (back plate portion 5A) and a suction-side duct plate (front plate portion 5B) having a suction port formed at an upper end thereof are attached. A cooler and a blower are installed in the duct below these bottom plates.

[0003] Then, the cool air that has exchanged heat with the cooler is blown out by a blower in the direction of the duct plate on the discharge side, and is discharged from the discharge port at the upper end into the refrigerator, and the cool air in the refrigerator is discharged from the suction port at the upper end of the duct plate on the suction side. It was to suck.

[0004]

However, since the bottom plate is only arranged between the inward flanges at the lower end of the duct plate and arranged side by side, the cool air blown out from the cooler causes gaps between these bottom plates to be removed. Alternatively, there is a problem that the gas leaks from the gap between the bottom plate and the duct plate into the refrigerator.

[0005] When the cool air leaks from the bottom plate, frost occurs when the moist air passes through the gap when the cooler is defrosted. Such frost is accumulated on the duct side without being melted after the completion of the defrosting, so that there is a problem that the duct is eventually closed and a cooling failure is caused.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problem, and has a low-temperature showcase that can effectively prevent the occurrence of cooling failure due to frost caused by a gap in a bottom plate portion. The purpose is to provide.

[0007]

According to the first aspect of the present invention, there is provided a low-temperature showcase comprising: a discharge-side duct plate having a discharge port formed at an upper end; a suction-side duct plate having a suction port formed at an upper end; A duct is formed inside the heat insulating wall by a plurality of bottom plates erected between the lower ends of these duct plates, and a cooler is installed in the duct below these bottom plates. Are formed, a rail provided with a heat insulating material on the upper surface is provided between the flanges, and the edges of the bottom plates are juxtaposed on the heat insulating material of the rail.

According to the first aspect of the present invention, an inward flange is formed at the lower end of each of the duct plates, and a rail provided with an insulating material on the upper surface is provided between the flanges. Since the edges of the bottom plates are arranged side by side, the cool air blown out from the cooler and leaking from the gap between the bottom plates is blocked by the rail. Therefore, it is possible to prevent the occurrence of cooling failure due to frost caused by the leakage of cool air from between the bottom plates.

In particular, the bottom plate can be removed and the bottom plate can be cleaned without removing the rail, and since the rail is provided with a heat insulating material, frost does not occur on the rail itself.

In addition to the above, a low-temperature showcase according to a second aspect of the present invention has a heat insulating material attached from the upper surface of the flange at the lower end of the duct plate on the discharge side to the side of the duct at the lower portion of the duct plate, and the upper surface of the heat insulating material on the upper surface of the flange. Is provided with an auxiliary heat insulating material constituting a relief portion at a position where the rail is mounted, and a bottom plate is brought into contact with the auxiliary heat insulating material.

According to the second aspect of the present invention, in addition to the above, a heat insulating material is attached from the upper surface of the flange at the lower end of the duct plate on the discharge side to the side surface of the duct at the lower portion of the duct plate. An auxiliary heat insulating material constituting a relief portion is provided at the position where the rail is mounted, and the bottom plate is brought into contact with this auxiliary heat insulating material, so the temperature of the lower end of the discharge side duct plate rises when the cooler is defrosted. This makes it easier for frost to grow on the portion. Also, a relief portion is formed on the upper surface of the flange of the duct plate by an auxiliary heat insulating material, the rail is lowered, and the bottom plate is brought into contact with this auxiliary heat insulating material, so the gap between the duct plate and the bottom plate is also closed, Leakage of cold air from the portion is reliably prevented. Therefore, it is possible to more effectively prevent the occurrence of cooling failure due to frost.

In a low-temperature showcase according to a third aspect of the present invention, in addition to the first aspect, the rail has a positioning side standing between the bottom plates.

According to the third aspect of the present invention, in addition to the first aspect, the rail is provided with the positioning side that stands between the bottom plates, so that it is possible to avoid the cold air leakage due to the positional deviation of the rail. It becomes.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a perspective view of a low-temperature showcase 1 of the present invention, FIG. 2 is a vertical side view of the low-temperature showcase 1, FIG. 3 is a vertical side view of the upper part of the low-temperature showcase 1, and FIG. Enlarged longitudinal side view of two openings, FIG.
Shows enlarged vertical sectional side views of the lower part of the duct plate 9, respectively.

In each of the drawings, a low-temperature showcase 1 is used for displaying and preserving ice cream or the like in a convenience store or the like, and has a main body composed of a horizontally long rectangular heat-insulating box 2 opened upward. ing. The heat insulating box 2 includes a metal outer box 3 and the outer box 3.
A metal inner box 6 incorporated at an interval in the inside, a resin breaker 4 connecting the upper ends of both boxes 3, 6, and an in-situ foaming method between the two boxes 3, 6 and the breaker 4. And a heat insulating material 7 such as foamed polyurethane filled.

Duct plates 8 and 9 are attached to the inside of the front and rear surfaces of the inner box 6 at intervals, and the upper ends of the duct plates 8 and 9 are bent inwardly and bent. Furthermore,
A plurality of bottom plates 11 called deck pans are detachably mounted between the lower ends of the duct plates 8 and 9, whereby a series of ducts 1 standing up and down from the bottom surface inside the inner box 6.
2 and the duct plates 8, 9 and the bottom plate 1
A storage compartment 22 is defined inside 1. On the other hand, the bottom wall 13 of the heat insulating box 2 has a stepped shape having a lower portion 13A at a front portion and a higher portion 13B at a rear portion, and the bottom plate 11 is located above the higher portion 13B.

A drain pan 14 is provided on the upper surface of the lower portion 13A, and a drain hole 16 is formed at the lowest position of the drain pan 14 and communicates outside and below the heat insulating box 2. On the drain pan 14, the duct 12
A horizontally long plate-fin type cooler 17 is disposed inside the fan case 18 and a fan case 18 provided on the front side of the cooler 17.
Inside, a blower 19 composed of a suction type propeller fan is mounted. Incidentally, reference numeral 20 denotes a temperature sensor attached to the cool air outflow side of the cooler 17, and reference numeral 25 denotes a duct plate 9.
Is a rectifying plate mounted in the duct 12 at the center of the rectifier.

Higher portion 13B located on the rear side of the cooler 17
The stepped portion of the lower portion 13A has an inclined surface 13C such that the upper portion is separated from the cooler 17. The upper end of the duct plate 9 is a discharge port 9A, the upper end of the duct plate 8 is a suction port 8A, and wind direction plates 21, 21 which are curved inward are attached to the discharge port 9A at predetermined intervals.

Here, inward flanges 8B, 9B are formed at the lower ends of the two duct plates 8, 9, and the lower surface of the duct plate 9, which is located on the cold air discharge side, on the side of the duct 12, is insulated. Material 86 is stuck. The upper end of the heat insulating material 86 is sandwiched between the straightening plate 25 and the duct plate 9, and the lower end is wound around the upper and lower surfaces of the flange 9B.

A heat insulating plate 87 is provided between the duct plate 9 of the cooler 17 and the duct plate 9, and is disposed below the bottom plate 11. The heat insulating plate 87 comprises a steel plate 88 and a heat insulating material 89 on the lower surface thereof.
It is provided on the upper heat insulating material 86 so as to contact the duct plate 9 over substantially the entire width thereof.

On the other hand, the bottom plate 11 is composed of a steel plate 91 and a heat insulating material 92 inside the steel plate 91.
On the duct plate 8 side, it is placed on the flange 8B.
The heat insulating plate 87 is provided with a gap G between the bottom plates 11 and 11.
And is provided corresponding to the lower side of the space G to close the gap G.

A screw 9 is provided on the side of the cooler 17 of the heat insulating plate 87.
3 is mounted so as to project downward.
Abuts against the cover of the cooler 17 and the like, and the displacement of the heat insulating plate 87 is prevented. When two heat insulating plates 87 are provided, the space between them is closed with a seal plate 87A.

A large number of through holes 24 are provided around the lower end of the heat insulating box 2.
Are provided, and a machine room 27 is formed between the kick plates 26 and 26 and below the heat insulating box 2. A compressor (not shown), which constitutes a known refrigeration cycle together with the cooler 17, a condenser 29, a blower 31 for the condenser, and an electric box (see FIG. (Not shown) and the like, and the rear surface of the machine room 27 is closed by a plurality of panels 36 to 38 so as to be openable and closable, and a plurality of slits 39 are formed in the panels 37 and 38. I have.

On the other hand, on both sides of the opening of the heat insulating box 2, side plates 41, 41 made of a thick plate of transparent acrylic resin are provided upright. The side plates 41, 41 have a substantially mountain shape inclined so that the upper portions of the front and rear sides 41A, 41B are close to each other, and a stainless steel top plate 42 as a covering plate is also formed between the upper ends thereof. Are screwed from the side via the decorations 43, 43.

The top plate 42 has a mountain-shaped cross section along the shape of the upper portions of the side plates 41, 41. The lower surface of the top plate 42 is provided with front and rear stainless steel upper support plates 44, 44, which are also made of stainless steel. A plate 46 is attached. The upper support plates 44, 44 are spaced apart from the lower surface of the top plate 42, and the front ends thereof are inclined downward downward substantially along the inclination of the front and rear sides 41A, 41B of the side plate 41, respectively. The portion is opposed to the upper support plate 44 at an interval.

Front and rear side surfaces 46A, 46A of the reflection plate 46
Are downwardly inclined downward with an interval below the upper support plates 44, 44, and the lower surface thereof is bent in a crank shape to form a concave portion 47 opened downward and a concave portion 4 opened upward.
8 are arranged side by side. A horizontally long fluorescent lamp 51 inserted into a jacket 49 is housed and arranged in the recess 47 opened downward, and the fluorescent lamp 51 is turned on in the recess 48 opened upward. Ballast 5
2 are provided. The upper support plates 44, 4
A plurality of through-holes (elongated holes) 53... Are formed in the base portion of the upper end of 4, that is, a portion to be attached to the top plate 42, so that the inside of the recess 48 in which the stabilizer 52 is stored The air heated by the stabilizer 52 is communicated with the upper surfaces of the upper support plates 44 and 44 and flows out to the upper surfaces of the upper support plates 44 and 44 as shown by arrows in FIG.

On the other hand, inside the front and rear opening edges of the heat insulating box 2, upper wind direction plates 56, 56 located above the suction port 8A and the discharge port 9A are attached to the inner surface of the breaker 4, respectively. The upper surface plate 57 made of stainless steel is combined above the plate 56 at intervals.

On the other hand, the breaker 4 in the longitudinal direction of the heat insulating box 2
Cylindrical drain sockets 7 open at the top and bottom on both sides
7, 77 are attached and extend downward. A drain hose 78 is connected to the lower end of the drain socket 77 before filling the heat insulating material 7 and is buried in the heat insulating material 7 when the heat insulating material 7 is foamed and filled. A water-receiving member 79 made of stainless steel, which is long to the left and right, is provided on the breaker 4 in the longitudinal direction via an L-shaped mounting plate 82.
It is screwed to.

The water receiving member 79 has a rectangular container shape having an opening 83 on the upper surface, and water receiving side drain ports 84 are provided on both sides of the bottom surface 79A so as to correspond to the upper portions of the drain sockets 77, 77. , 84 are drilled.

An opening 8 is provided in the water receiving member 79.
A stainless steel rail 63 is inserted from 3. The rail 63 is formed by welding three stainless steel plates.
It is formed in a substantially W shape, whereby the inner rail surface 63A extending to the left and right facing the side surfaces 46A, 46A of the reflection plate 46, and the upper support plate parallel to the outside of the inner rail surface 63A. Outer rail surfaces 63B facing the 44, 44 directions are formed.

At this time, the entire lower portion (each rail surface 63A, 63B) of the rail 63, including its longitudinal ends, has entered the water receiving member 79, and the outer end plate 66 of the rail 63 is attached to the mounting plate. It enters the lower side of 82 and is fastened and fixed together with the mounting plate 82 and the water receiving member 79 with screws. The bumper 62 is engaged with the upper and lower ends of the mounting plate 82.

Each rail surface 63 of the rail 63
A and 63B are provided with three rail-side drain outlets 65 on the left and right at the lower end portions (pointed portions).
5 are all located in the water receiving member 79 (on the bottom surface 79A). The storage room 22 of the low-temperature showcase 1 is opened (openings 64, 64) between the rails 63, 63 and the top plate 42 in the front-rear direction.

On the inner and outer rail surfaces 63A, 63B of the rail 63, a plurality of sliding doors 73A, 73A, 73 made of transparent glass fitted in a sash.
B and 73B are slidably mounted and supported. in this case,
In the embodiment, eight doors 73A are arranged in front and rear of each of the two doors.
, 73B are supported, and the inner door 7 is supported on both sides of the inner rail surface 63A in the closed state.
The upper portions of 3B and 73B are slidably supported on the side surface 46A of the reflection plate 46. Further, in the closed state, the upper portions of the outer doors 73A, 73A which are supported by the central portion of the outer rail surface 63B and abut against each other are the upper support plate 44.
Is slidably supported. 81 is each door 73
A handle provided on the mating side of A and on the outer surface of each door 73B.

Here, the doors 73A and 73B are cooled by the cool air in the storage room 22, and dew condensation occurs on the outer surfaces exposed to the outside air. The condensed water flows down the outer surfaces of the doors 73A and 73B as shown by arrows in FIG.
3 flows into the respective rail surfaces 63A and 63B. The condensed water flowing into each of the rail surfaces 63A and 63B drops downward from the three rail-side drain holes 65 and is received by the water receiving member 79.

When the dew water received by the water receiving member 79 reaches a predetermined amount, it flows down by its own weight in the direction of the water receiving side drain ports 84, 84, and drops from the drain sockets 77, 77 into the drain sockets 77, 77, and the drain hose 78 Is discharged to the outside.

With the above configuration, the compressor and the blower 1
When the coolers 9 and 31 are operated, the cool air cooled by the cooler 17 is blown rearward in the duct 12 from the inclined surface 13 </ b> C, rises from the lower part of the duct plate 9, passes through the straightening plate 25, and reaches the upper end of the duct plate 9. The liquid is discharged from the discharge port 9A toward the upper part of the storage room 22. The cool air circulated in the storage chamber 22 is sucked into the duct 12 from the suction port 8A at the upper end of the duct plate 8 and circulates back to the blower 19 (indicated by a broken arrow in FIG. 2). Thereby, the inside of the storage room 22 is cooled to a predetermined freezing temperature, for example, −20 ° C.

At this time, each bottom plate 1 is placed below the bottom plate 11.
Since the heat insulating plate 87 is provided corresponding to the gap G between the bottom plates 11 and 11,
Cold air that is about to leak to the storage room 22 from the gap G between the two is blocked by the heat insulating plate 87. Therefore, the bottom plates 11, 1
It is possible to prevent the occurrence of cooling failure due to frost caused by the leakage of cool air from between the two.

In particular, even after the bottom plate 11 is removed,
7, the duct 12 is maintained, so that the commodity can be stored in the storage room 22 immediately after the bottom plate 11 is cleaned.

A heat insulating material 86 is attached from the upper surface of the flange 9B of the duct plate 9 to the side of the duct 12 below the duct plate 9, and the heat insulating plate 87 is placed on the heat insulating material 86 of the flange 9B over substantially the entire width of the duct plate 9. Therefore, when the cooler 17 is defrosted, the temperature of the lower end portion of the duct plate 9 easily rises, and frost hardly grows in the portion. Insulation material 8
6 and the heat insulating plate 87, the duct plate 9 and the bottom plate 1
Also, the gap with 1 is closed, and the leakage of the cool air from the portion can be surely prevented, so that the occurrence of the cooling failure due to the frost can be more effectively prevented.

Further, since the screw 93 for positioning which is protruded toward the duct 12 is attached to the heat insulating plate 87, it is possible to prevent the cool air from leaking due to the displacement of the heat insulating plate 87.

Next, FIGS. 9 to 11 show another configuration of the low-temperature showcase 1 of the present invention. In each figure, the same reference numerals as those in FIGS. 1 to 8 denote the same elements. In this case, on the upper surface of the heat insulating material 86 on the flange 9B of the duct plate 9, a plurality of auxiliary heat insulating materials 96 are attached.
A space is formed between these auxiliary heat insulating materials 96... Corresponding to the gap between the bottom plates 11, 11, and escape portions 97, 9 are formed there.
7 is assumed. Reference numeral 98 denotes a rail made of a steel plate having a substantially inverted T-shape, and a heat insulating material 99 is attached to a surface other than the positioning side 98A standing upright at the center.

The rail 98 is provided between the flanges 8B and 9B of the duct plates 8 and 9, and
At the time, the gas enters the escape portion 97. At this time,
The thickness of the rail 98 including the heat insulating material 99 (positioning side 98A)
) Is matched to the thickness of the auxiliary insulation 96, whereby the upper surface of the insulation 99 is
It is flush with the upper surface of.

Then, the lower ends of both side edges of the bottom plates 11, 11 are juxtaposed on the heat insulating material 99 of the rail 98. As a result, the gap G between the bottom plates 11, 11 is closed by the rail 98, and the front and rear edges of the bottom plate 11 abut against the auxiliary heat insulating material 96.
The gap between the base plate 11 and the bottom plate 11 is completely closed.

At this time, the positioning side 98A is located on the bottom plate 1
Since the rail 98 enters the gap G between the rails 1 and 11, there is no displacement of the rail 98. The positioning side 98A is located on the bottom plate 11.
The size does not protrude upward, and does not obstruct the goods stored in the storage room 22.

[0045]

As described above in detail, according to the first aspect of the present invention, an inward flange is formed at the lower end of each of the duct plates, and a rail provided with an insulating material on the upper surface is provided between the flanges. At the same time, since the edges of the bottom plates are arranged side by side on the heat insulating material of the rails, the cool air that is blown out from the cooler and leaks from the gap between the bottom plates is prevented by the rails.
Therefore, it is possible to prevent the occurrence of cooling failure due to frost caused by the leakage of cool air from between the bottom plates.

In particular, the bottom plate can be cleaned by removing the bottom plate without removing the rail, and since the rail is provided with a heat insulating material, frost does not occur on the rail itself.

According to the second aspect of the present invention, in addition to the above, a heat insulating material is attached from the upper surface of the flange at the lower end of the duct plate on the discharge side to the side surface of the duct at the lower portion of the duct plate. The auxiliary heat insulating material that constitutes a relief part is provided at the position where the rail is mounted, and the bottom plate is in contact with this auxiliary heat insulating material, so the temperature of the lower end of the duct plate on the discharge side during defrosting of the cooler As a result, the frost is difficult to grow on the portion. Also, a relief portion is formed on the upper surface of the flange of the duct plate by an auxiliary heat insulating material, the rail is lowered, and the bottom plate is brought into contact with this auxiliary heat insulating material, so the gap between the duct plate and the bottom plate is also closed, Leakage of cold air from the portion is reliably prevented. Therefore, it is possible to more effectively prevent the occurrence of cooling failure due to frost.

Further, according to the invention of claim 3, according to claim 4,
In addition to the above, since the rail is provided with a positioning side standing between the bottom plates, it is possible to prevent a cold air leak due to a positional shift of the rail.

[Brief description of the drawings]

FIG. 1 is a perspective view of a low-temperature showcase of the present invention.

FIG. 2 is a vertical side view of a low-temperature showcase of the present invention.

FIG. 3 is a vertical side view of the upper part of the low-temperature showcase of the present invention.

FIG. 4 is an enlarged vertical cross-sectional side view of the heat-insulating box opening of the low-temperature showcase of the present invention.

FIG. 5 is an enlarged vertical sectional side view of a lower part of a duct plate on a discharge side.

FIG. 6 is a sectional view taken along line AA of FIG. 5;

FIG. 7 is a perspective view of a heat insulating plate.

FIG. 8 is a perspective view of a lower portion of the inside of the heat insulating box excluding a bottom plate.

FIG. 9 is an exploded perspective view of the lower part of the duct plate on the discharge side of another low-temperature showcase of the present invention.

FIG. 10 is a vertical sectional front view of a bottom plate portion of the low-temperature showcase of FIG. 9;

FIG. 11 is a perspective view of a rail.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Showcase 2 Insulated box body 8, 9 Duct plate 8B, 9B Flange 11 Bottom plate 12 Duct 17 Cooler 86, 89, 99 Insulation material 87 Insulation plate 93 Screw 96 Auxiliary insulation material 97 Release part 98 Rail

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toyosaku Hamada 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-3-274371 (JP, A) Hei 7-294109 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25D 17/08

Claims (3)

(57) [Claims] 1. A heat-insulating duct plate having a discharge port formed at an upper end, a suction-side duct plate having a suction port formed at an upper end, and a plurality of bottom plates provided between lower ends of these duct plates. In a low-temperature showcase in which a duct is formed inside the wall and a cooler is installed in the duct below the bottom plate, an inward flange is formed at the lower end of both the duct plates, and the upper surface extends between these flanges. A low-temperature showcase comprising a rail provided with a heat insulating material, and edges of respective bottom plates arranged side by side on the heat insulating material of the rail. 2. A heat insulating material is attached from the upper surface of the flange at the lower end of the duct plate on the discharge side to the side of the duct at the lower portion of the duct plate. The low-temperature showcase according to claim 1, wherein an auxiliary heat insulating material is provided, and the bottom plate is brought into contact with the auxiliary heat insulating material. 3. The low-temperature showcase according to claim 1, wherein the rail has a positioning side standing between the bottom plates.