JPS6133510Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an open show case in which a winding and automatic return type film is extended as needed on the outside of a cold air curtain formed in the opening for storing and taking out products. The purpose of this is to eliminate dew condensation on the film surface and smooth the winding function of the film.

In general, this type of open store case has an automatically retractable film extended outside the cold air curtain that closes the opening in order to reduce the refrigeration load when the store is not open, such as at night. Although the film prevents the cold air curtain from coming into contact with the outside air surrounding the case body, moisture in the outside air adheres to its surface as dew due to the influence of the cold air. This dew is a nuisance to the film, and when the film is rewound into a cylindrical shape, it gets between the overlapping parts of the film and increases the diameter of the film, impeding the winding function. Instead, when it was next expanded, it would scatter and cause various problems, such as staining the entire area.

This proposal was made in view of these shortcomings.

The following is an explanation of the embodiment of the present invention with reference to the drawings: 1
1 is an open case whose main body is composed of a heat insulating wall 2 having an opening 3 for storing and taking out products at the front, and a partition wall 4 is disposed at an appropriate distance from the inner wall of the heat insulating wall to serve as a cooler. 7. Forming a cold air passage 5 in which a blower 8 is installed and a storage chamber 6 equipped with a plurality of shelves 9, and forming an air outlet 10 and an inlet 11 facing each other at the upper and lower edges of the opening. Become,
A cold air curtain A is formed in the opening 3 by forcedly circulating the cold air that has been heat exchanged with the cooler using a blower.
is formed to cool the storage chamber 6.

Reference numeral 12 denotes a winding and automatic return type film provided on the outside of the upper part of the opening, which is normally cylindrical in shape and rotatably supported within a support member to be described later. A locking tool 13 is provided to reduce the refrigeration load from the opening 3 when the
By pulling it downward and locking it to the stopper 14 of the front wall 2a, it expands along the outside of the cold air curtain A, and covers the opening and prevents outside air from entering the cold air curtain A. It is. The film is made of a flexible material such as transparent plastic that allows the storage chamber to be seen through, and is processed so as to have a winding function. It expands and automatically returns to its cylindrical shape when released. 16 shown in FIG. 4 is a thin film formed by vacuum deposition on one surface of the film 12 with one or more metals or metal oxides such as aluminum, gold, silver, and tin oxide as main components. The formed heat ray reflective coating reflects heat rays such as infrared rays that try to enter the storage chamber 6 through the opening 3. Incidentally, this coating is formed on the back surface of the film 12 in FIG. 4, that is, on the surface that comes into contact with the cold air curtain A.

Support members 17, 18, and 19 are integrally formed with a cylindrical portion 21 having a slit 20 for inserting and removing the film on the circumferential surface, and an attaching portion 23 having an attaching hole 22 for attaching to the case body. Both ends and the center of the film are internally supported in the cylindrical portion 21 and are attached to the outer recess 24 in the upper part of the opening 3. Among the parts, a closing part 25 is provided on the outside of the members 18 and 19 that support both ends of the film 12 to prevent the film from moving from side to side, and a reinforcing part 26 is provided on the member 17 that supports the center. It is being 27 is a fluorescent lamp provided in the recess. According to such a configuration, when the film 12 is expanded outside the cold air curtain A, the film 12
In addition to reducing the refrigeration load by preventing contact between cold air and outside air, the coating 16 can also reflect heat rays that try to enter the storage compartment 6 to the outside of the storage compartment, and the cold air curtain A Since radiant cooling can be reflected to the inside of the storage chamber, the refrigeration load can be further reduced, and the surface of the film 12 can be maintained at a temperature above the dew point using the heat rays reflected by the coating 16. In addition to eliminating dew condensation on the surface, the film 12
The automatic winding return function of the film 12 is not degraded by condensation, and since the coating itself is light in weight, the winding function of the film 12 is not impaired. That is, the film 12 is extended outside the cold air curtain A so that the film 16 is exposed to the cold air curtain A under the conditions that the outside air (indoor air) temperature is 30°C and the cold air temperature in the storage room 6 is 5°C. As the humidity is increased to 50%, dew condensation will occur on the surface of the film 12. On the other hand, if a film that does not form the film 16 is extended outside the cold air curtain A under the above conditions and the outside air humidity is increased to 40%. Humidity causes dew condensation on the film surface, and as a result, the film 12 generates a heat storage effect of heat rays on the film 12 itself and is heated, so that the dew point temperature of the film surface can be raised. Under the above conditions, when the film 12 is extended outside the cold air curtain A with the coating 16 as the surface, the film 12 has a heat ray reflection effect, but the film 12 cannot store heat rays, so the humidity level is 40%. I found out that condensation occurs.

Therefore, the diameter of the film 12 will not increase due to dew, which will impede the winding function, or the dew will not scatter all around when it is expanded.

As described above, according to the present invention, when the automatically wound film is unfolded, the film itself prevents the cold air from coming into contact with the outside air, reducing the refrigeration load. Due to the heat ray reflection effect of the formed film, heat rays that try to enter the storage chamber are reflected to the outside of the storage chamber, further reducing the refrigeration load.At the same time, the dew point temperature on the film surface is significantly raised, making it possible to reduce the temperature of the film. It is possible to maintain the surface in a state in which condensation is difficult to occur, and as a result, the refrigeration load can be significantly reduced, and the function of automatically returning the film as it is wound can be maintained in good condition. It is possible to avoid the scattering of dew during expansion.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the open show case of the present invention, Fig. 2 is an enlarged sectional view of the same main part, and Fig. 3 is an enlarged sectional view of the same main part.
The figure is also a perspective view of the main part, and FIG. 4 is a longitudinal cross-sectional view of the film used in the present invention. 3... Opening, 6... Storage chamber, 12... Film, 16... Heat ray reflective coating, 17, 18, 19...
...Supporting member.

Claims (1)

[Scope of utility model registration request] An open show case in which a film that is automatically wound up is provided on one side edge of an opening for storing and taking out products, and the film is spread outside a cold air curtain formed in the opening so as to cover the opening. . An open show case, in which a coating containing metal or a metal acid as a main component and reflecting heat rays is formed on the surface that faces the cold air curtain when the film is unfolded.