JP3133568B2 - 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 for displaying and selling foods such as ice cream.

[0002]

2. Description of the Related Art Conventionally, as shown in Japanese Patent Publication No. 3-30071 (F25D23 / 02), a low-temperature showcase of this type cools a storage room formed inside a heat insulating wall which opens forward by a cooling device. At the same time, the opening of the heat insulating wall is openably and closably closed by a glass door pivotally supported. Then, the food is displayed and stored in the storage room, and when the customer selects the food, the inside can be seen through the glass door, and when the food is taken out, the door can be opened.

[0003]

However, the conventional glass door has a structure in which a frame member is fitted to a peripheral edge of a glass plate (which is formed of three sheets of double-glazed glass) and assembled. However, there has been a problem that the assembling work of the door becomes extremely complicated.

[0004] When the low-temperature showcase is used for display and sale of frozen foods such as ice cream,
Since the inside of the storage room is cooled to a freezing temperature below the freezing point, dew condensation easily occurs on the surface of the glass plate outside the storage. In order to prevent this in the publication, a print heater is attached to the back of the glass plate (transparent plate) on the outside of the refrigerator. However, in the case of a glass plate with such a heater, in addition to increasing costs,
It is hardly useful for preventing dew condensation on the frame member, and it is necessary to separately provide a heater for preventing dew condensation on the frame member. Further, since heat is generated from the entire surface of the glass plate, the influence of heat on the storage room side also increases, and the load on the cooling device increases, which causes a problem that the performance of the cooling device must be improved accordingly.

The present invention has been made to solve the above-mentioned conventional technical problem, and an object of the present invention is to provide a low-temperature showcase in which the assembling work of a door having glass is remarkably improved. .

Another object of the present invention is to provide a low-temperature showcase that can effectively prevent dew condensation on the door frame and the glass plate surface while suppressing the thermal influence on the storage room. is there.

[0007]

SUMMARY OF THE INVENTION A low-temperature showcase according to the present invention.
The heat-insulating wall 1 has a heat-insulating wall (heat-insulating box 3) having an opening therein and constituting the storage room 11, a door 2 for opening and closing the opening of the heat-insulating wall, and a cooling device for cooling the storage room 11. Cooling device R
And the door 2 is composed of a frame 21 having a frame shape and a transparent glass 22 attached inside the frame 21. The transparent glass 22 is composed of at least two glass plates 22A and 22B. And a metal spacer 23 sandwiched between the glass plates 22A and 22B. The frame 21 includes a pressing wall portion 28 in contact with the outer glass plate 22A and a pressing wall portion 28. An outer groove 29 formed at a position corresponding to the metal spacer 23 on a surface of the portion 28 that contacts the glass plate 22A, and an inner groove 31 formed at the pressing wall portion 28 located inside the outer groove 29. , A heater 32 is provided in the outer groove 29 and the inner groove 3 is provided.
1, a seal member 33 is provided.

According to the low-temperature showcase 1 of the present invention, an outer groove 29 is formed on the surface of the holding wall portion 28 which is in contact with the glass plate 22A on the outside, corresponding to the metal spacer 23. Since the heater 32 is provided, the door frame 24 can be directly heated by the heat generated by the heater 32, and in addition to the metal spacers 23 via the glass plate 22A.
Can be heated. Therefore, the cooling effect from the storage chamber 11 transmitted to the door frame 24 via the metal spacer 23 can be reduced, and as a result, the door frame 24
It is possible to effectively eliminate dew condensation.

In particular, by heating the metal spacer 23, the heater 32 can be spread over a wide area of the outer glass plate 22A.
From the glass plate 22A, and dew condensation on the glass plate 22A is suppressed, and since heat is not generated from the glass plate 22A as in the related art, the storage room 1
1 has little thermal effect. Further, since the sealing material 33 is provided in the inner groove 31 formed inside the outer groove 29, even if dew is formed on the surface of the glass plate 22A, the dew water is blocked by the sealing material 33 and the water is prevented from flowing toward the heater 32. You will not be able to enter. Accordingly, it is possible to prevent the occurrence of the earth leakage failure due to the flooding of the heater 32 and the like.

[0010]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a low-temperature showcase 1 of the present invention, FIG. 2 is a perspective view of the low-temperature showcase 1 with a door 2 opened, and FIG. The low-temperature showcase 1 of the embodiment is, for example, a small desk-top type showcase for displaying and selling while freezing ice cream, and an insulating box 3 as an insulating wall having an opening on the upper surface, and an opening of the insulating box 3. 2 that can be opened and closed from above and a machine room 4 that is configured on the rear side of the heat insulating box 3.
It is composed of

The heat-insulating box 3 is provided between a metal outer box 6 and an inner box 7 opened on the upper surface.
A cooling pipe 9 constituting a cooling device R is wound around the heat insulating material 8 side of the inner box 7. A storage room 11 opened upward is formed in the inner box 7, and the inside thereof is appropriately partitioned by a partition plate 12 or the like. On the other hand, a compressor 13 and the like constituting the cooling device R are installed in the machine room 4. A pair of left and right hinges 14, 14 are attached to the heat insulating box 3 side in the machine room 4, and the rear sides of the door 2 are pivotally supported by the hinges 14, 14.

A raised portion 16 is formed at the rear of the door 2 above the machine room 4, and a translucent shade 17 on which advertising characters and the like are printed is attached to the front of the raised portion 16. ing. Further, a fluorescent lamp 18 is housed in the raised portion 16 behind the shade 17, and the light of the fluorescent lamp 18 illuminates the advertisement character of the shade 17 and floats.

On the other hand, the door 2 comprises a frame 21 having a frame shape and a transparent glass 22 mounted inside the frame 21. As shown in FIG. 4, the transparent glass 22 includes two rectangular inner and outer glass plates 22A and 22B and two glass plates 2A and 22B.
Metal spacer 23 interposed between 2A and 22B
Is a double-glazed glass composed of
A sulfur hexafluoride gas is sealed between A and 22B, and a heat ray reflective film is appropriately adhered to the inner surface of the outer glass plate 22A.

The frame 21 comprises a frame door 24 made of a hard synthetic resin, and four gasket fixing members 26 made of a hard synthetic resin provided at four sides of the door frame 24. . A handle 27 is formed on the front side of the door frame 24, and the rear side of the door frame 24 is fixed to the hinges 14. Furthermore,
The door frame 24 has a pressing wall portion 28 whose upper surface continuously projects inward.
, And an inner groove 31 is formed inside the outer groove 29. In the outer groove 29, a heater 32 made of an electric heater wire is housed, and in the inner groove 31, a sealing material 33 made of soft foamed vinyl chloride or the like is housed. On the other hand, the gasket fixture 26 has an engagement groove 30 opened downward, and the engagement groove 30.
An inner flange portion 35 is formed to extend from the inside to the inside, and a gasket 36 is inserted into and engaged with the engagement groove 30.

When assembling the door 2, the door frame 24 is turned upside down and the heater 32 and the sealing material 33 are first stored in the outer groove 29 and the inner groove 31, respectively. The gasket fixing device 26 is mounted on the periphery of the door frame 24, and the gasket fixing device 26 is applied to the gasket fixing device 26 from above. Thereby, the transparent glass 2
Since the door 2 is sandwiched between the holding wall 28 of the door frame 24 and the inner flange 35 of the gasket fixing member 26, the door 2 is completed by such a simple assembling operation, and the door 2 is pivotally connected to the hinges 14 as described above. To support.

At this time, the holding wall 28 of the door frame 24
The outer groove 29 on the back side is the metal spacer 2 of the transparent glass 22.
3 above. A drainage channel 38 is formed in the frame body 21 located on the hinges 14 side, and communicates the space above the glass plate 22A with the machine room 4.
Further, a dew tray 42 is provided in the machine room 4, and the drainage channel 38 is opened above the dew tray 42.

With the above arrangement, when the compressor 13 is operated, the condensed refrigerant flows into the cooling pipe 9 under reduced pressure, and evaporates there to cool the inner box 7. Thereby, the storage room 11
The ice cream stored inside is kept frozen at a freezing temperature such as -20 ° C. By such cooling, the transparent glass 22 of the door 2
Is cooled, the moisture in the outside air tends to condense on the upper surface of the glass 22A in contact with the outside air. Further, since the metal spacer 23 has good thermal conductivity, the temperature is lowered by the cooling action from the storage room 11. Therefore, the door frame 24 located above the door frame is also easily subjected to the cooling action, and dew condensation is easily generated on the upper surface.

However, according to the present invention, the outer grooves 29
Corresponds to the metal spacer 23, and the heat from the heater 32 provided therein heats the door frame 24 directly and the metal spacer 2 via the glass plate 22A.
Heat 3 as well. Accordingly, in addition to the direct heating, the cooling action from the metal spacer 23 is also suppressed, so that dew condensation on the upper surface of the door frame 24 is effectively eliminated.
Further, by heating the metal spacer 23, heat is also transmitted in a wide range to the inner glass plate 22A, so that dew condensation on the upper surface of the glass plate 22A is suppressed.

Particularly, in this case, since the heat is not generated from the glass plate 22A itself, the heat influence on the storage room 11 is small, so that it is not necessary to increase the size of the cooling device R in consideration of the heat influence. Thereby, the low-temperature showcase 1 can be reduced in size.

When the door 2 is opened, the dew formed on the upper surface of the glass plate 22A flows down to the hinge sides 14, 14, and is smoothly discharged from the drainage channel 38 to the dew tray 42 in the machine room 4. At this time, since the sealing material 33 is provided in the inside groove 31 located inside the heater 32, the dew condensation water grown on the upper surface of the glass plate 22A cannot enter the heater 32 side. Therefore, a leakage fault or the like due to the flooding of the heater 32 is also prevented.

In the embodiment, the present invention is applied to a low-temperature showcase that opens upward. However, the present invention is not limited to this. The present invention also applies to a low-temperature showcase that opens and closes a heat-insulating box that opens forward with a door. Is valid.

[0022]

As described above in detail, according to the present invention, an outer groove corresponding to a metal spacer is formed on a surface of a pressing wall portion of a door frame which comes into contact with an outer glass plate. Since the heater is provided, the door frame can be directly heated by the heat generated by the heater, and the metal spacer can be heated via the glass plate. Therefore, the cooling effect from the storage chamber transmitted to the door frame via the metal spacer can be reduced, and the condensation on the door frame can be effectively eliminated as a whole.

In particular, by heating the metal spacer, heat from the heater is transmitted to a wide area of the outer glass plate, and dew condensation on the glass plate is suppressed. Since no heat is generated from the glass plate, the influence of heat on the storage room can be reduced. In addition, since the sealing material is provided in the inner groove formed inside the outer groove, even if dew condensation occurs on the surface of the glass plate, the dew water is blocked by the sealing material and cannot enter the heater direction. It is possible to prevent the occurrence of a leakage fault or the like due to the flooding of the heater.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of the low-temperature showcase of the present invention in a state where a door is opened.

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

FIG. 4 is an enlarged vertical sectional side view of a door of a low-temperature showcase of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-temperature showcase 2 Door 3 Insulated box 11 Storage room 21 Frame 22 Transparent glass 23 Metal spacer 24 Door frame 26 Gasket fixture 28 Pressing wall 29 Outer groove 31 Inner groove 32 Heater 33 Sealing material R Cooling device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F25D 23/02 302 A47F 3/04 F25D 21/04

Claims (1)

(57) [Claims] 1. A storage room is formed inside with an opening.
A heat insulating wall, and a door for opening and closing the opening of the heat insulating wall,
A cooling device for cooling the storage room, wherein the door
A frame-shaped frame and a transparent frame attached to the inside of the frame.
And a low-temperature showcase comprising
Bright glass is composed of at least two glass plates and each glass plate
And metal spacers sandwiched between them
In both cases, the frame body is applied around the outside of the glass plate.
A pressing wall portion to be in contact with the glass plate of the pressing wall portion;
At a position corresponding to the metal spacer on the surface
Outer groove and the pressing wall portion located inside the outer groove
And an inner groove formed in the outer groove.
And a sealing material is provided in the inner groove.
A low-temperature showcase.