JP3118367B2 - Low temperature 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 low-temperature showcase having a transparent door for closing an opening and illuminating a storage room with a fluorescent lamp.

[0002]

2. Description of the Related Art Conventionally, a low-temperature showcase of this kind is provided with a storage room surrounded by a transparent wall made of glass or the like as shown in Japanese Utility Model Publication No. 61-40212 (A47F3 / 04). The opening formed on the rear surface is similarly opened and closed by a sliding door made of glass or the like. The storage room is cooled to a predetermined temperature by a cooler, and goods such as food are displayed and stored on a shelf. Also,
Fluorescent lamps (illumination lamps) are arranged in the upper part of the storage room to illuminate the products in the storage room, thereby improving the display effect.

[0003]

Here, since the storage room of the low-temperature showcase is cooled to a predetermined refrigeration or freezing temperature as described above, the temperature of the surface of the transparent door also becomes low. For this reason, there has been a problem that moisture in the outside air adheres to the outer surface of the transparent door as dew condensation, thereby deteriorating the visibility in the storage room.

Therefore, conventionally, an electric heater was mounted on the surface of the transparent door or inside the sash, and the surface of the door was heated by this heater to prevent the dew condensation. However, the number of parts increased and the cost of the door increased. Along with soaring, there was a problem that it was difficult (practically impossible) to adopt a sliding door. By the way, for example, Japanese Utility Model Publication No. 56-39987 (F25D21 / 04) discloses a concept that in an open showcase, condensation or the like on a printed circuit board is evaporated by heat generated by a fluorescent lamp and a ballast for lighting the fluorescent lamp. I have.

The present invention has been made to solve the above-mentioned conventional technical problem, and provides a low-temperature showcase that can prevent or suppress dew condensation on the outer surface of a transparent door with a simple configuration. With the goal.

[0006]

SUMMARY OF THE INVENTION A low-temperature showcase according to the present invention.
The cooling device cools the storage room and the storage room
The reflector attached to the surface and the upper part supported on the outer surface of this reflector
A sliding door type transparent door that is held and closes the opening of the storage room,
Fluorescent lamp attached below the reflector and between the reflector and the top plate
With a ballast attached, from the transparent door of the reflector
A through-hole that communicates the inside and outside of the reflector with the upper part
And extend the top plate from above the through hole to above the transparent door.
It is characterized by having.

[0007] According to the present invention, it is installed on the lower surface of the top plate of the storage room.
The upper part of the sliding door type transparent door is supported on the outer surface of the attached reflector.
And attach a fluorescent lamp under the reflector, and
Attach a ballast between the top plates, and use the transparent door of the reflector.
Communicate the inside and outside of the reflector to the part located above
A through hole is formed, and the top plate is moved from above the through hole to above the transparent door.
, The warming up caused by the heat generated by the ballast
The air flows out of the reflector through the through-hole and is guided by the top plate.
To be guided to the outside of the transparent door.

Therefore, outside the transparent door cooled from the storage room.
It is possible to win prevent or suppress the occurrence of condensation on the surface,
It is possible to prevent deterioration of visibility in the storage room from the transparent door
It becomes possible, and the dew condensation occurs in the sliding door type transparent door.
The effect can be prevented or suppressed,
Will be enormous.

[0009] In addition, the heat dissipation of the ballast can be performed well.
Can be eliminated before damage such as damage due to overheating
In addition, it is necessary to attach a conventional electric heater to the door
Eliminates the need for parts and significantly reduces costs
Can be achieved.

[0010] In particular, a fluorescent plate is attached to the lower surface of the top plate to provide a fluorescent light.
Place a lamp below this reflector and a ballast between the reflector and top plate.
And the transparent door is supported on the outer surface of the reflector, and
The warm air is guided to the outside of the door by the through hole of the reflector and the top plate.
The overall structure can be simplified and downsized
And increase productivity.
You.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of a low-temperature showcase 1 to which the present invention is applied, FIG. 2 is a vertical sectional side view of the low-temperature showcase 1, and FIG. In each of the drawings, a low-temperature showcase 1 is a frozen showcase for displaying and storing ice cream and the like in a convenience store or the like, and is composed of a horizontally long rectangular heat-insulating box 2 opened upward. 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 inward and bent. Furthermore,
A bottom plate 11 is detachably mounted between the lower ends of the duct plates 8 and 9, thereby forming a series of ducts 12 standing up and down from the bottom inside the inner box 6. A storage room 22 is defined inside the bottom plate 11. 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. A drain hole 16 is formed at the lowest position of the drain pan 14 and communicates with the outside of the heat insulating box 2 at a lower position. On the drain pan 14, the duct 12
The cooling device is provided with a horizontally long plate fin type cooler 17 constituting a cooling device, and a fan case 18 provided with a suction type propeller fan is mounted in a fan case 18 provided on the front side of the cooler 17. ing.

A high-order portion 13B 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.

On the other hand, kick plates 26, 26 having a large number of through holes 24 are attached to the front and rear ends of the heat insulating box 2, and the heat insulating box 2 is located between the kick plates 26, 26. A machine room 27 is formed below the space.
A compressor (not shown), which constitutes a well-known refrigeration cycle of a cooling device together with the cooler 17, a condenser 29, a blower 31 for the condenser, and electric equipment are provided in the machine room 27 located below the high-order portion 13B. A box (not shown) and the like are provided, and a rear surface of the machine room 27 has a plurality of panels 36 to 36.
38, the panel is opened and closed freely.
Are formed with a plurality of slits 39.

When the compressor and the blowers 19 and 31 are operated, the cool air cooled by the cooler 17 is cooled by the inclined surface 13C.
Then, the air is blown backward in the duct 12, and is discharged from the discharge port 9 </ b> A at the upper end of the duct plate 9 toward the upper part of the storage room 22. The cool air circulated in the storage room 22 is sucked into the duct 12 from the suction port 8A at the upper end of the duct plate 8, and the blower 19
(Indicated by the dashed arrow in FIG. 2). Thereby, the inside of the storage room 22 is cooled to a predetermined freezing temperature, for example, −20 ° C.

On the other hand, on both sides of the opening of the heat-insulating box 2, side plates 41, 41 made of a transparent acrylic resin thick plate are erected. The side plates 41, 41 have a substantially mountain shape that is inclined such that the upper portions of the front and rear sides 41A, 41B are close to each other.
This is also screwed from the side via stainless steel 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 constitute a part of the reflection plate 46. The upper support plates 44, 44 have a predetermined distance from the lower surface of the top plate 42, and the front ends thereof are located on the front and rear sides 4 of the side plate 41.
It is inclined downward and downward substantially along the inclination of 1A and 41B.

The front and rear side surfaces 46A, 46A of the reflection plate 46
As shown in FIGS. 3 and 7, the lower part is inclined downward and outward at a distance below the upper support plates 44, 44, and the lower surface thereof is bent in a crank shape to form a concave part 47 which is opened downward.
And concave portions 48 opened upward are arranged in front and rear.
A horizontally elongated fluorescent lamp 51 inserted into a jacket 49 is accommodated and disposed in the downwardly opened recess 47, and is located below the reflector 46 and in the upwardly opened recess 48. Ballast 5 for turning on the fluorescent lamp 51
2 is disposed between the top plate 42 and the reflection plate 46.

A plurality of through-holes (slots) 53 as passages are formed in the upper end portions of the upper support plates 44, 44, that is, at the base for attaching the reflection plate 46 to the top plate 42. Thereby, the inside of the recess 48 (inside the reflection plate 46) in which the stabilizer 52 is stored and the outer surfaces of the upper support plates 44, 44 (outside the reflection plate 46) are communicated.

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.
An upper heat insulating material 58 is provided between the upper wind direction plate 56 and the upper surface plate 57.
A dew condensation prevention heater 59 is interposed between the upper heat insulating material 58 and the upper surface plate 57.

The outer sides of the upper plates 57, 57 (in the front and rear directions) are inclined and descend, and extend to the center of the upper surface of the breaker 4 while being bent in a substantially Z-shape. Rail plates 61, 61 are inserted below the upper plates 57, respectively, and rise from the top end of the upper plate 57 while being inclined outward, and the outer ends are bent down again. The outer ends of the rail plates 61 are provided with an outer box 3.
Decorative plate 62 is attached.

The outer portions of the upper plates 57, 57 are bent in a substantially Z-shape (shown in an enlarged manner in FIG. 4) as described above, so that the outer surfaces of the upper plates 57, 57 in the side surfaces 46A, 46A direction of the reflecting plate 46 are formed. Forming an inner rail surface 63A extending to the left and right,
The rail plates 61, 61 form an outer rail surface 63B facing the upper support plates 44, 44 in parallel with the outside of the inner rail surface 63A. Inner / outer rail surface 63
A and 63B each have a predetermined width, and the main rail 63 is formed by the inner and outer rail surfaces 63A and 63B. The main rails 63, 63 and the top plate 4
Between the two, the storage room 22 of the low-temperature showcase 1 opens back and forth (openings 64, 64).

With such a configuration, the upper edges of the front and rear openings 64, 64 of the storage room 22 of the low-temperature showcase 1 are located deeper than the lower edge and open diagonally upward, and the main rails 63, 6 are opened.
3 are located at the lower edges of the openings 64, 64, and the side surfaces 46A, 46A of the upper support plates 44, 44 and the reflecting plate 46 are located at the upper edges of the openings 64, 64. Incidentally, 66
Is a drain hole for dew condensation water drilled at the lower end of the upper surface plate 57 located inside the inner rail surface 63A.

Further, an auxiliary rail 71 made of stainless steel as a rail is detachably mounted on the main rails 63, 63. This auxiliary rail 71 is 2
The inner and outer rail surfaces 71A, which have a width smaller than the width of the inner and outer rail surfaces 63A and 63B of the main rail 63, are formed by welding a plurality of stainless steel plates. 71B are formed. Also,
The surface of the auxiliary rail 71 is coated or coated with a fluorine-based resin (such as Teflon).

As shown by arrows in FIG. 5, the auxiliary rail 71 is mounted on the main rail 63. In this state, the inner and outer rail surfaces 71A, 71B are connected to the respective rail surfaces 63A, 63B of the main rail 63. It is located on the outer side and faces the side surfaces 46A and 46A of the reflection plate 46 and the upper support plates 44 and 44, respectively. Each rail surface 71
A and 71B also have drain holes 72 and 7 at the lower ends thereof.
2 are drilled.

On the inner and outer rail surfaces 71A and 71B of the auxiliary rail 71, a plurality of sliding door type resin doors 73 made of a transparent acrylic resin plate having a relatively small thickness are provided.
Are slidably mounted and supported. In this case, in the embodiment, eight resin doors 73 are supported in the front and rear two by two inside and outside, and the resin doors 73 supported on the inner rail surface 71A.
7 is supported on the outer surface of the side surface 46A of the reflecting plate 46 as shown in FIG. 7, and the upper portion of the resin door 73 supported on the outer rail surface 71B is supported on the outer surface below the through hole 53 of the upper supporting plate 44. You. The front and rear portions of the top plate 42 descend from above the through holes 53 along the slopes of the front and rear sides 41A and 41B of the side plate 41 and extend above the resin doors 73.

At this time, since the inner and outer rail surfaces 71A and 71B of the auxiliary rail 71 are narrow, the resin doors 73 are hard to meander. In the embodiment, the auxiliary rail 7 is used.
1 is coated or coated with a fluororesin. Further, as is apparent from FIG. 4, the lower inner corners of the resin door 73 are in line contact with the inner and outer rail surfaces 71A and 71B, and are apparent from FIG. As described above, since the upper inner corner of the resin door 73 is in line contact with the side surface 46A of the upper support plate 44 or the reflecting plate 46, the resin door 73 and the auxiliary rail 71, or the upper support plate 44, the side surface 46A. And the frictional resistance between the two becomes extremely low. Therefore, the lateral movement (sliding) of the resin doors 73 can be performed extremely smoothly, and as a result, the resin doors 73 can be opened and closed very easily. Incidentally, 77 and 78 shown in FIG.
4 and a door stopper attached to the side surface 46A of the reflection plate 46.

The inner and outer rail surfaces 7 of the auxiliary rail 71
1A and 71B are the rail surfaces 6 of the main rail 63 as described above.
3A and 63B, the reflector 4
6, the side 46A, the direction of the 46A, and the upper support plate 4
4 and 44, the inclination of the resin doors 73 approximately matches the inclination of the front and rear surfaces 41A and 41B of the side plate 41.

On the other hand, the fluorescent lamp 51 is turned on to illuminate the inside of the storage room 22 from above, and brightly illuminate the goods stored therein. At this time, the fluorescent lamp 51 and the ballast 52 generate heat. The warm air heated by the ballast 52 and the fluorescent lamp 51 (the heat from the fluorescent lamp 51 is transmitted through the reflector 46) is transmitted from the front and rear through holes 53, 53 to the outside of the reflector 46 as shown by broken arrows in FIG. , And is guided by the top plate 42 and flows out of the resin door 73.

Here, the resin door 73 is cooled by the cool air in the storage room 22 and dew condensation easily occurs on its outer surface. However, the warm air from the stabilizer 52 is guided to the outer surface of the resin door 73 as described above. Therefore, it is possible to prevent or suppress the adhesion of dew condensation to the outer surface of the resin door 73 without using an electric heater or the like, and to maintain the visibility of the resin door 73 in a good condition. In addition, heat dissipation of the ballast 52 itself is promoted,
The occurrence of damage due to overheating is also prevented.

Next, a glass door 81 is used in place of the resin door 73.
Will be described. The glass door 81 includes a transparent glass 82 as shown in FIG. 6, a frame-shaped aluminum sash 83 surrounding the glass 82,
It consists of a lower wheel 84 and a lateral wheel 86 attached to the lower surface and the inner surface of the lower side of the sash 83, respectively.
6) (the thickness of the sash 83).

In this case, the auxiliary rail 71 is removed, and the glass doors 81 are placed and supported on the inner and outer rail surfaces 63A and 63B of the main rail 63. In this embodiment, eight glass doors 81 are supported inside and outside, two by two. At this time, the glass door 81 is thicker than the resin door 73, but the rail surfaces 63A and 63A of the main rail 63 are as described above.
3B is wider than the rail surfaces 71A and 71B of the auxiliary rail 71, so that the glass doors 81 can be placed without any trouble.

The lower wheel 84 of the glass door 81 slidably abuts on the rail surface 63A or 63B, respectively, and the horizontal wheel 86 is formed on the outer surface of the vertical wall of the upper surface plate 57 located inside each of the rail surfaces 63A and 63B. Slidably in contact with Further, the glass door 8 supported on the inner rail surface 63A.
The upper part of 1 is the side surface 46 of the reflection plate 46 as in the case of the resin door.
The upper portion of the glass door 81 supported by the outer rail surface 63B is also supported by the upper support plate 44.

Although the glass door 81 is heavier than the resin door 73, the sliding movement of the wheels 84 and 86 allows the glass door 81 to move smoothly and open and close. Also, the inner and outer rail surfaces 63A, 63 of the main rail 63
B indicates the side surfaces 46A and 46A of the reflection plate 46, respectively, as described above.
Since they face in the direction A and in the direction of the upper support plates 44, 44, the inclination of the glass doors 81... Substantially matches the inclination of the front and rear sides 41A, 41B of the side plate 41. Therefore, when either the glass door 81 or the resin door 73 is used, the inclination thereof substantially coincides with the inclinations of the front and rear sides 41A and 41B of the side plates 41 located on both sides. Is prevented from being deteriorated.

Here, inside the resin door 73 or the glass door 81, a pipe 88 made of white vinyl chloride is attached along the inclination of the rear side 41B of the side plate 41. The pipe 88 communicates the inside of the machine room 27 with the space above the reflector 46, and a lead (not shown) to the fluorescent lamp 51 is passed through the pipe 88 from the electrical box to the reflector 46. Pull in upwards.

At this time, the upper part of the heat insulating box 2 is surrounded by transparent side plates 41, 41 or doors 73, 81,.
Is provided along the inclination of the rear side 41B of the side plate 41, so that it is not noticeable from the outside. Therefore,
Deterioration of the appearance of the low-temperature showcase 1 can be minimized.

In the embodiment, the reflection plate 46 and the upper support plate 4
Although the stainless steel plate 4 is formed of a separate stainless steel plate, the present invention is not limited to this, and one stainless steel plate may be bent and integrally formed.

[0039]

As described in detail above, according to the present invention, storage
Sliding door type transparent on the outer surface of the reflector attached to the lower surface of the room top plate
Supports the upper part of the door and attaches a fluorescent lamp below the reflector
When a ballast is installed between the reflector and the top plate,
In addition, the portion of the reflector located above the transparent door
Form a through hole that communicates the inside and outside of the firing plate, and make the top plate a through hole
The ballast extends from above to above the transparent door.
The warm air heated by the
Leaked, guided by the top plate and guided to the outer surface of the transparent door
become.

Therefore, outside the transparent door cooled from the storage room
Can prevent or suppress the occurrence of condensation on the surface,
It is possible to prevent deterioration of visibility in the storage room from the transparent door
It becomes possible, and the dew condensation occurs in the sliding door type transparent door.
The effect can be prevented or suppressed,
Will be enormous.

Also, the heat radiation of the ballast can be performed well.
Can be eliminated before damage such as damage due to overheating
In addition, it is necessary to attach a conventional electric heater to the door
Eliminates the need for parts and significantly reduces costs
Can be achieved.

In particular, a reflector is attached to the lower surface of the
Place a lamp below this reflector and a ballast between the reflector and top plate.
And the transparent door is supported on the outer surface of the reflector, and
The warm air is guided to the outside of the door by the through hole of the reflector and the top plate.
The overall structure can be simplified and downsized
And increase productivity.
You.

[Brief description of the drawings]

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

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

FIG. 3 is a vertical sectional side view of an upper part of a low-temperature showcase to which the present invention is applied.

FIG. 4 is an enlarged vertical cross-sectional side view of the heat-insulating box opening with the auxiliary rail attached.

FIG. 5 is an enlarged vertical cross-sectional side view of the heat-insulating box opening for explaining the work of attaching the auxiliary rail.

FIG. 6 is an enlarged vertical sectional side view of the heat-insulating box opening in a state where the auxiliary rail is removed and a glass door is used.

FIG. 7 is an enlarged vertical sectional side view of a top plate portion of the low-temperature showcase to which the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-temperature showcase 2 Insulated box 22 Storage room 41 Side plate 42 Top plate 44 Upper support plate 46 Reflector 51 Fluorescent lamp 52 Stabilizer 53 Through hole 64 Opening 73 Resin door

Continued on the front page (72) Inventor Yoshihisa Ishida 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Inside Sanyo Electric Co., Ltd. (72) Inventor Shuji Kashide 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Toyosaku Hamada 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Hiroshi Hayashi 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka Inside Sanyo Electric Co., Ltd. (56) References Japanese Utility Model 60-6056387 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47F 3/04 F21V 23/02 F25D 21/04

Claims (1)

(57) [Claims] A cooling device for cooling a storage chamber;
A reflector attached to the lower surface of the cellar top plate and the outside of this reflector
The upper surface is supported on a surface to close the opening of the storage chamber.
Door type transparent door and fluorescent lamp attached below the reflector
And a ballast attached between the reflector and the top plate,
The part located above the transparent door of the reflection plate
A through-hole communicating the inside and outside of the reflector is formed, and the top plate is
Extending from above the through hole to above the transparent door
Low temperature showcase.