JPH09178341A - Refrigerating and cold storage open display case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multistage type refrigerating and cold storage open display case which makes it possible to easily set the illuminance balance of the indoor entirety in a preferable state even if the distance from an illumination lamp to a commodity surface is extended by reducing the number of intermediate shelves. SOLUTION: In the multistage refrigerating and cold storage open display case having a plurality of stages of display shelves 2, 3, 4, the shelf 2 of the uppermost stage of the shelves is illuminated by a canopy illumination lamp 7a and a ceiling illumination lamp 6a and the residual intermediate stage of the shelf and lowermost stage of the display part are illuminated by shelf illumination lamps 2a, 3a, 4a installed on the lower surfaces of the ends of the respective shelves, the output of the ballast of both or ether one of the lamps 7a and 6a is set to the higher output than a reference output.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a freezing / refrigerating open showcase, and more particularly, to improvement of illuminance balance of each shelf in a multistage open showcase having a plurality of display shelves.

[0002]

2. Description of the Related Art A multi-stage refrigeration system having a plurality of display shelves
In a refrigerated open showcase, the entire showcase needs to be illuminated with appropriate brightness in order to make the products displayed on the display shelves stand out or give a fresh impression.

FIG. 5 shows an arrangement example of general lighting in a conventional multi-stage freezing / refrigerating open showcase. In this freezing / refrigerating open showcase, display shelves 2, 3, 4, 5 are provided in a plurality of upper and lower stages (4 stages) inside the showcase main body 1 having an open front, and the display shelves on the ceiling stage are illuminated. Ceiling lamp 6a and canopy lighting lamp 7a for the ceiling portion 6 and the ceiling portion 6
The display shelves 2, 3, 4, 5 and the lowermost display portion 8 are illuminated on the lower surfaces of the front end portions of the display shelves 2, 3, 4, 5 respectively. The shelf illumination lamps 2a, 3a, 4a, and 5a are provided for the purpose. These illumination lamps 2a to 7a include
Usually, a straight tube type fluorescent lamp is used, and it is turned on through a ballast provided for each.

In such a multi-stage showcase, due to its structure, the uppermost display shelves, which are farther from the lamp than the shelves, tend to be the darkest. Therefore, for example, in the showcase disclosed in Japanese Utility Model Laid-Open No. 5-88372, the shelf lighting lamps 2a, 3a, 4a,
Use an inverter ballast for 5a and reduce the ballast output to about 85% by using a dimmer, and keep the ballast output of the ceiling lighting lamp 6a and the canopy lighting lamp 7a without dropping. Then, I was trying to balance the overall illuminance.

Further, as shown in FIG. 6, since the ceiling lighting lamp 6a is directly attached to the ceiling panel 9, cold air stagnates in the ceiling corner portion 9a, resulting in the lamp 6a.
There was a case where the product was cooled and it became impossible to obtain a predetermined illuminance.

[0006]

On the other hand, in recent years, sales floors have been expanded in order to improve the ability to attract customers. In order to reduce loss, the number of cases where the number of intermediate shelves in a multi-stage open showcase is set to a small number is increasing. For this reason, the mirror 1a provided in the upper back part of the showcase body 1 is set larger than the conventional one, and the uppermost display shelf is set lower than the conventional one. It has become almost impossible to obtain the illuminance balance of.

The present invention has been made in view of such circumstances.
With the aim of providing a freezer / refrigerator open showcase that can easily bring the illuminance balance of the entire warehouse into a preferable state even when the number of intermediate shelves is reduced and the distance from the illumination lamp to the product display surface is increased. There is.

[0008]

In order to achieve the above object, the freezing / refrigerating open showcase of the present invention has a plurality of display shelves, and the uppermost display shelf of the display shelves is used for a canopy. Illuminate with a lighting lamp and a ceiling lighting lamp,
In the multi-stage freezing / refrigerating open showcase configured so that the remaining middle display shelves and the lowermost display shelves are illuminated by a shelf illumination lamp installed on the lower surface of the front end of each display shelves. It is characterized in that the output of the ballast of both the lamp and / or the ceiling lighting lamp or one of the lamps is set higher than the standard output.

Further, the present invention is characterized in that the output of the ballast with the high output is 120 to 125% of the standard output, and the ballast with the high output is an inverter ballast. The ceiling lighting lamp is provided with a reflecting plate that reflects light from the lamp in a direction of illuminating the uppermost display shelf, and is attached to a lamp holder provided on the reflecting plate. It has a feature.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. 1 to 4 show an example of a freezing / refrigerating open showcase to which the present invention is applied. FIG. 1 is a cross-sectional view of a multistage open showcase, and FIG. 2 is an explanatory diagram of a lighting circuit of a lighting lamp. 3 is a circuit diagram showing an inverter ballast, and FIG. 4 is a sectional view of a main part showing a ceiling illumination lamp portion. The same components as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

First, as shown in FIG. 1, three upper and lower display shelves 2, 3 and 4 are provided in the interior of the showcase body 11, and the lower surface of the front end of each display shelf is used for shelves. Illumination lamps 2a, 3a, 4a are provided. Further, the ceiling 6 is provided with a ceiling illumination lamp 6a, and the canopy portion 7 protruding from the ceiling 6 is provided with a canopy illumination lamp 7a.

The shelf lighting lamps 2a, 3a, 4a, the ceiling lighting lamp 6a, and the canopy lighting lamp 7a.
Are lit by a lighting circuit as shown in FIG. That is, the shelf lighting lamps 2a, 3a, 4a are turned on by the general copper-iron ballast 12 and the glow lamp 13, and the ceiling lighting lamp 6a and the canopy lighting lamp 7a.
Are formed so as to be lit by the output-up type inverter ballast 14.

As shown in FIG. 3, the inverter ballast 14 is composed of a smoothing circuit 15 and an oscillating circuit 16. The smoothing circuit 15 rectifies the alternating current from the alternating current power supply 17 and oscillates it. A perfect smoothing circuit that can apply a direct current with a small ripple to 16 is adopted. This eliminates the pause section in the lamp current waveform, so that the efficiency of light output with respect to the lamp current can be improved, and the actual ballast output can be made higher than the standard output. For example, when the FL40 (FL32) fluorescent lamp is turned on, the light output can be improved to 120% with a lamp current of about 400 mA.

The output up ratio can be set arbitrarily, but if it is increased up to about 130%, it becomes bright, but the power factor deteriorates, and the power consumption extremely increases.
Since the problem of shortening the lamp life occurs, the range of 120 to 125% is suitable for the standard output.

Further, as shown in FIG. 4, a reflecting plate 18 for reflecting light from the ceiling lighting lamp 6a toward the uppermost display shelf is provided on the ceiling portion 6 of the ceiling lighting lamp 6a. A lamp holder 19 is provided on the reflecting plate 18, and the lamp holder 19 is used for the ceiling lighting lamp 6a.
Is configured to hold. As a result, not only can the illumination effect of the ceiling display lamp 6a on the uppermost display shelf portion be increased, but at the same time, the reflection plate 18
As a result, the flow of cold air can be guided, so that the stagnation of cold air in the portion of the ceiling lighting lamp 6a can be eliminated. In particular, by providing a cool air guide portion 18a that guides the flow of the cool air downward as shown by an arrow A in the drawing on the upstream side of the flow of the cool air of the reflector plate 18, the amount of the cool air that directly hits the ceiling lighting lamp 6a is reduced. Since it can be reduced, it is possible to prevent the illumination lamp 6a for the ceiling from being cooled and the illuminance from decreasing. The reflector 18 may be a white paint plate or a mirror surface material that has been conventionally used as a reflector.

In this way, by increasing the output of the ballasts of the ceiling lighting lamp 6a and the canopy lighting lamp 7a, the number of display shelves can be reduced as compared with the conventional case and the lamps 6a, 7a.
Even when the space from a to the product display surface is open, it is possible to evenly illuminate each display shelf 2, 3, 4 and the display section 8 at the bottom with appropriate brightness, and for the conventional shelf It is possible to prevent the entire device from becoming dark as in the case where the ballast output of the illumination lamp is dropped.

The lamp for increasing the ballast output may be either the ceiling lighting lamp 6a or the canopy lighting lamp 7a, and can be selected in consideration of the structure of the showcase and the lighting effect.

Further, as described above, by using the inverter ballast as the ballast, the lamp can be brightly lit with the power consumption which is almost the same as when the copper-iron ballast is used at the normal output. The increase in power can be extremely reduced. However, since the inverter ballast is more expensive than the copper-iron ballast, the output-up type of the copper-iron ballast may be used when the initial investment needs to be suppressed.

[0019]

As described above, in the freezing / refrigerating open showcase of the present invention, the ballast output of the canopy lighting lamp or the ceiling lighting lamp is increased to 100% or more of the normal level, so that it tends to be dark. It is possible to increase the illuminance of the uppermost display shelf and maintain the illuminance balance of the entire showcase in an appropriate state.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a multi-stage open showcase to which the present invention is applied.

FIG. 2 is an explanatory diagram showing an example of a lighting circuit of a lighting lamp.

FIG. 3 is a circuit diagram showing an example of an inverter ballast.

FIG. 4 is a sectional view of a main part showing a ceiling illumination lamp portion.

FIG. 5 is a cross-sectional view showing an example of a conventional multi-stage open showcase.

FIG. 6 is a sectional view of a main part showing a conventional ceiling illumination lamp portion.

[Explanation of symbols]

 2,3,4 Display shelves 2a, 3a, 4a Shelf lighting lamp 6 Ceiling part 6a Ceiling lighting lamp 7 Canopy part 7a Canopy lighting lamp 11 Showcase body 12 Copper iron ballast 13 Glow lamp 14 Output up type inverter Ballast 15 Smoothing circuit 16 Oscillation circuit 17 AC power supply 18 Reflector 18a Cold air guide 19 Lamp holder

Claims (4)

[Claims] 1. A display rack having a plurality of display shelves, wherein the uppermost display rack of the display racks is illuminated by a canopy lighting lamp and a ceiling lighting lamp, and the remaining middle display rack and the lowermost display rack are illuminated. In a multi-stage freezing / refrigerating open showcase configured to illuminate the display part with a shelf lighting lamp installed on the lower surface of the front end of each display shelf, either or both of the canopy lighting lamp and the ceiling lighting lamp. A freezer / refrigerator open showcase characterized by setting the output of the ballast of one of the lamps to a higher output than the standard output. 2. The freezer / refrigerator open showcase according to claim 1, wherein the output of the ballast having a high output is set to 120 to 125% of the standard output. 3. The freezer / refrigerator open showcase according to claim 1, wherein the ballast having a high output is an inverter ballast. 4. The ceiling illumination lamp comprises a reflector for reflecting light from the lamp in a direction of illuminating the uppermost display shelf, and is attached to a lamp holder provided on the reflector. The frozen / refrigerated open showcase according to claim 1.