JPH07222656A - Dew formation prevention structure for refrigerated display case - Google Patents

Abstract

PURPOSE:To provide a dew formation prevention structure for a refrigerated display case which achieve a prevention of dew formation accurately and a reduction in cost structurally or in view of the power consumption while facilitating the mounting of a transparent partition without extra care. CONSTITUTION:A refrigerated display case in which chilled air is circulated to an article housing section has a transparent partition 1 on an interface between the chilled air and atmospheric air and on the interface between chilled airs. The transparent partition 1 has a pair of transparent plate materials 2a and 2b facing each other with a fixed gap and transparent film-shaped heaters 3a and 3b attached separately to opposed surfaces at the gap parts of the respective transparent plate materials.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dew condensation preventing structure for a refrigerated showcase for displaying and storing fresh food, frozen food and other articles.

[0002]

2. Description of the Related Art A refrigerated showcase of this type is an open front type used for storing fresh food in supermarkets, for example, and has an air curtain formed from the front edge of the ceiling wall to the front edge of the bottom wall, and the side wall and other parts. With a transparent partition plate on the vertical wall of, or a box-shaped open type or closed type that is often used for storing frozen foods,
Some have a transparent partition plate at the boundary between the cool air and the outside air on the top surface, front surface or side surface.

In a refrigerating showcase in which cold air is circulated in the article storage section as described above, which has a transparent partition plate at the boundary between cold air and the outside air or at the boundary between cold air, the surface of the transparent partition plate is Condensation may occur due to a temperature difference between the cool air and the outside air in the case, a temperature difference between the cool air, and the like, so that it may be difficult to see through the inside.

Therefore, in comparison with the above-mentioned transparent partition plate,
Various dew condensation prevention structures heated by an electric heater or the like are applied. For example, Japanese Utility Model Publication No. 60-38860 discloses a technique in which a transparent film heater is attached to one of the facing surfaces of a transparent plate material such as a pair of facing glass plates forming a transparent partition plate by metal vapor deposition. ing.

[0005]

By the way, the above-mentioned 1
A transparent partition plate with a transparent film-shaped heater attached to one of the opposing surfaces of the pair of transparent plate materials is one in which only one transparent plate material is heated effectively and exhibits a dew condensation preventing function.
It is necessary to mount it in such a way that it faces the high temperature side that comes into contact with outside air. In this case, there is a possibility that the operator makes a mistake in distinguishing each transparent plate material, such as arranging the transparent plate material on the heater attachment side on the cool air side, and the complicated work such as confirmation and replacement at the time of mounting work. There is.

Further, in the structure in which the heater is provided only on one of the transparent plates facing each other, a device such as a transformer for lowering the supply voltage is often required, which causes an extra cost in terms of components or power consumption. There was also a problem that it was spent, and conversely the heating setting was troublesome and the problem of dew condensation occurred.

The present invention has been made in view of the above circumstances, and the transparent partition plate can be easily attached without requiring extra caution, and dew condensation can be surely prevented, and the structure or power consumption can be improved. It is an object of the present invention to provide a dew condensation prevention structure for a refrigerated showcase that can reduce consumption cost.

[0008]

In order to achieve the above object, the present invention provides a transparent partition plate in a refrigerated showcase, a pair of transparent plate members facing each other with a constant gap, and each transparent plate. A transparent film heater is attached to each of the opposing surfaces of the plate member in the gap.

[0009]

According to the present invention, the transparent film heater is attached to both of the pair of transparent plate members constituting the transparent partition plate. No special settings are required. Therefore, the confirmation of the direction and the replacement are not complicated, and the transparent partition plate can be easily attached without requiring extra caution.
Also, by attaching a heater to each transparent plate material, the electric resistance value as a whole is increased and the necessity of electric equipment such as a transformer can be reduced. Therefore, it is possible to reliably prevent dew condensation, and to reduce the cost in terms of configuration or power consumption.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure of a transparent partition plate according to this embodiment. This transparent partition plate 1 comprises a pair of transparent plate members facing each other with a constant gap, such as a glass plate (2a),
(2b) and a transparent film-shaped heater attached to each of the glass plates (2a) and (2b) by attaching a heat-generating film or vapor-depositing a resistance material to substantially the entire opposing surfaces in the gaps.
The configuration includes (3a) and (3b).

Electrodes (4a), (5a), (4b) and (5b) having the same width are provided on both ends of each heater (3a) and (3b) along one direction, and one electrode (4a ) And (4b) are connected to each other in series by a connection cord (6), and the other electrodes (5a) and (5b) are connected to a 100V DC power source by power cords (7a) and (7b), respectively.

2 and 3 show the above-mentioned transparent partition plate.
The structure of the refrigerating showcase to which (1) is applied is shown.

FIG. 2 shows an open front refrigerating showcase (8), which extends from the front edge of the ceiling wall (9) to the bottom wall (10).
An air curtain is formed on the front edge of the
End wings glass (1a), (1a) and middle wing glass as transparent partition plates at the front edges of 1) and the middle wall (12)
(1b) is provided respectively. Wing glass
(1a) and (1a) are transparent partition plates at the boundary between cold air and outside air, and the intermediate wing glass (1b) is a transparent partition plate at the boundary between cold air. These end wing glasses (1
a) and (1a) and the intermediate wing glass (1b) are opposed to each other with a certain gap shown in FIG. 1 between the glass plates (2a) and (2).
It is composed of a transparent partition plate (1) having b) and transparent film-shaped heaters (3a) and (3b) attached to the opposing surfaces thereof.

Further, what is shown in FIG. 3 is a box-shaped upper opening type showcase (13), in which the cool air is directed from the cool air outlet (15) at the upper part of the rear wall (14) toward the arrow (a). It is blown out as described above and comes into contact with the front transparent partition plate (1c). In this case, the transparent partition plate (1c) has a pair of glass plates (2a), (2) facing each other with a constant gap shown in FIG.
It is composed of a transparent partition plate (1) having b) and transparent film-shaped heaters (3a), (3b) attached to the opposing surfaces thereof.

According to the structure of this embodiment, the outside air side surfaces of the end wing glasses (1a) and (1a) shown in FIG. 2 and the hot side cold air contact surface of the intermediate wing glass (1b), or FIG. Where there is a possibility of dew condensation on the outside air side surface of the transparent partition plate (1c) shown, it is possible to reliably prevent dew condensation by heating with a heater.

According to this embodiment, a pair of glass plates (2a), (1a), (1a), a pair of glass plates (2a), (1a), an intermediate wing glass (1b) and a transparent partition plate (1c) are formed. 2
By adopting a configuration in which transparent film heaters (3a) and (3b) are attached to both of (b), it is not necessary to set the orientation of each surface specially when mounting these, and therefore the orientation can be confirmed. It can be easily performed without any complication such as replacement and replacement, and without requiring extra caution.

By attaching heaters (3a) and (3b) to both of the pair of glass plates (2a) and (2b), the heat generation amount in the conventional example as shown in FIG. On the other hand, as shown in (b) of the figure, since the heat generation amount can be reduced by the increase of the electric resistance value as a whole, it becomes possible to reduce the necessity of electric equipment such as a transformer, and it is possible to reduce the structural or power consumption. It also makes it possible to reduce consumption costs.

The present invention is not limited to the configuration of the above embodiment, and various modifications can be made. For example, in the above-mentioned embodiment, the transparent film-shaped heaters (3a) and (3b) each consisting of one sheet are attached to substantially the entire opposing surfaces of the glass plates (2a) and (2b).
As shown in Fig. 5, replace each heater (3a), (3b) with a glass plate (2
a) and (2b) are divided into two parts, and each electrode (4a), (5a), (4b),
One (5b) of (5b) may be short-circuited and connected as a whole in a closed loop. According to such a configuration, each heater
The resistance value can be set by changing the width for each of the heater elements divided into (3a) and (3b), so that the change of the heat generation amount and the change of the dew condensation preventing effect can be made. In the front opening type refrigerating showcase shown in FIG. 2, since the temperature of the end wing glass near the cool air outlet of the ceiling wall is greatly decreased, as shown in FIG. If so, the effect of preventing dew condensation becomes better.

In addition to the above embodiments, the present invention can of course be applied to a box-shaped closed refrigerating showcase and other various refrigerating showcases.

[0021]

As described in detail in the above embodiments, according to the present invention, a transparent partition plate in a refrigerated showcase is provided with a pair of transparent plate members facing each other with a constant gap, and each transparent plate. By having a transparent film heater attached to each of the facing surfaces of the plate member in the gap, it is not necessary to set the direction of each surface when mounting each transparent plate member. There is no need to check or change the parts, and the transparent partition plate can be easily installed without any extra precautions, and the overall electrical resistance value is increased, reducing the need for electrical equipment such as transformers. It is possible to prevent dew condensation,
In addition, excellent effects such as cost reduction in configuration or power consumption can be achieved.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is a perspective view of a transparent partition plate.

FIG. 2 is a perspective view of a front opening type refrigerated showcase showing an application example of the same embodiment.

FIG. 3 is a perspective view of a top-opening type refrigerating showcase showing an application example of the same embodiment.

FIG. 4 is an explanatory view of the operation of the embodiment, in which (a) is a comparative conventional example,
(b) shows each of the present examples.

FIG. 5 shows another embodiment of the present invention and is a perspective view of a transparent partition plate.

[Explanation of symbols]

 (1) Transparent partition plate (2a), (2b) Transparent plate material (glass plate) (3a), (3b) Heater (8) Front open refrigerated showcase (9) Ceiling wall (10) Bottom wall (11) Side wall (13) Top open refrigerated showcase

Claims (3)

[Claims] 1. A refrigerating showcase in which cold air is circulated in an article storage unit, wherein a transparent partition plate is provided at a boundary between cold air and outside air or at a boundary between cold air, the transparent partition plate having a constant gap. A pair of transparent plate members having and facing each other,
A dew condensation preventing structure for a refrigerating showcase, comprising: a transparent film-shaped heater attached to the facing surface of each of the transparent plate members in the gap. 2. A front open refrigerating showcase in which an air curtain is formed from a front edge of a ceiling wall to a front edge of a bottom wall, and transparent partition plates are provided on side walls and other vertical walls. The plate is configured to have a pair of transparent plate members facing each other with a constant gap, and a transparent film-shaped heater attached to each of the facing faces of the transparent plate members in the gap. Dew condensation prevention structure for refrigerated showcases. 3. A box-shaped open-top or closed refrigeration showcase having a transparent partition plate at the boundary between the cool air and the outside air on the upper surface, front surface or side surface, wherein the transparent partition plate has a fixed gap. A pair of transparent plate members facing each other and a transparent film heater attached to each of the facing faces of the transparent plate members in the gap portion. Dew condensation prevention structure.