JP2009106515A - Lighting device for multistage refrigerated open showcase - Google Patents

Abstract

In a conventional open showcase for refrigeration, a cold air outlet is provided at the upper end of the showcase, which is an optimal mounting position for a lighting device for interior lighting. Therefore, there is a problem that sufficient lighting cannot be performed.
According to the present invention, an illuminating device in which an LED lamp is attached to a circuit board provided with a blowout hole makes it possible to install a cold air outlet and an illuminating device at the same position. By satisfying the lighting effect and setting both to the same position, the heat generated by the LED lamps can prevent condensation caused by outside air coming into contact with the cold air outlet. It is also effective for power saving, such as being able to cancel.
[Selection] Figure 1

Description

  The present invention provides an air curtain at the front opening so that consumers can easily pick up products that need to be refrigerated at supermarkets, convenience stores, etc. The present invention relates to a refrigerated open showcase that can be maintained, and specifically relates to a configuration of an illuminating device that is suitable for lighting products displayed in the refrigerated open showcase.

  FIG. 5 shows an example of the configuration of a conventional refrigerated open showcase 90 of this type of multistage type. A duct 92 is formed in the main body case 91 except for the front opening 91a. A cooler 93 and a fan 94 are provided in the duct 92. The air in the duct 92 is cooled by the cooler 93, and the air in the duct 92 is cooled by the fan 94 on the upper end side of the main body case 91. The air is blown toward the outlet 95.

  By doing in this way, the air (cold air) cooled by the cooler 93 is ejected from the upper air outlet 95, but a suction port 96 is provided in the traveling direction of the ejected air, Since most of the air ejected from the upper air outlet 95 is sucked, a so-called air curtain is formed in the front opening 91a, and the inside of the main body case 91 is kept cool. Become.

  In addition, what is shown by the code | symbol 97 in a figure is a fluorescent lamp for product illumination, Since the preferable installation position of this fluorescent lamp 97 overlaps with the said upper blower outlet 95, it is before this upper blower outlet 95. A canopy 97a is provided, and a fluorescent lamp 97 is mounted inside. In addition, if the fluorescent lamp 97 alone is insufficient in illumination, it is compensated by being attached to the lower part of the inner shelf 98 provided inside. In FIG. 5, the middle shelf 98 is shown as an example of one stage, but there are many cases where a plurality of stages are provided.

Furthermore, although not shown in the drawing, the upper air outlet 95 comes into contact with the outside air, so that condensation occurs at a high temperature and high humidity, causing a situation in which the consumer feels uncomfortable, such as dripping water drops. Since there is a possibility, a heater is provided in the vicinity of the upper air outlet 95, for example, the upper air outlet 95 formed of a member having good thermal conductivity such as a metal member is warmed so that the above situation does not occur. is doing.
Japanese Patent Laid-Open No. 09-037900

  However, in the conventional open showcase 90 for refrigeration described above, for example, when the storage capacity is increased in order to increase the number of displayed products, the height of the main body case 91 is increased and the number of the middle shelves 98 is not increased. It will not be obtained. In this case, the product between the middle shelves 98 can be sufficiently illuminated by a fluorescent lamp or the like attached to the lower surface of the upper middle shelf 98.

  However, since the lowermost product display shelf 99 is provided with a suction port 96, if the middle shelf 98 provided above it is lengthened, the passage of cool air from the upper outlet 95 will be obstructed. The recovery efficiency is lowered, and measures such as strengthening the capacity of the cooler 93 are required, which increases the power consumption and the running cost.

  Therefore, in the lowermost product display shelf 99, it depends on the light from the fluorescent lamp 97 provided in front of the above-described upper air outlet 95, and is far from the distance. Since it is diffused light, there is a problem that the illumination of the portion in front of the lowest product display shelf 99 where the display effect is most enhanced is insufficient, and the solution of this point is an issue.

  The present invention is a lighting device for an open showcase for multi-stage refrigeration as a specific means for solving the above-described conventional problems, and is a general illumination provided in the vicinity of the cold air outlet at the top of the showcase In the lighting device, the lighting device is formed on the circuit board, which is formed to have substantially the same size as the cold air outlet and is provided so as to cover the cold air outlet with the air holes provided at appropriate intervals. The problem is solved by providing an illumination device for a multistage refrigerated open showcase, which is a white light emitting LED lamp mounted between the two.

  According to the present invention, it is assumed that the lowest product display shelf is illuminated with a highly directional LED lamp, and that the cold air outlet and the illumination device are in the same position, so that sufficient illumination is conventionally achieved. It is difficult, and the lighting of the lowermost display shelf, particularly the front side, is sufficient, and the display effect is extremely excellent.

  Further, according to the present invention, the dew condensation prevention heater can be cut off while the lighting device is lit, so that the dew condensation prevention heater is not used during a longer business day of the day. This reduces the power consumption of the multi-stage refrigerated open showcase and has an excellent effect in reducing running costs.

  Below, this invention is demonstrated in detail based on embodiment shown in a figure. What is shown by the code | symbol 1 in FIG. 1 is the illuminating device based on this invention, In FIG. 1, the state which attached the illuminating device 1 of this invention to the cold air outlet 11 of the open showcase 10 for multistage refrigeration is a front view. It is shown by.

  Here, the illuminating device 1 performs power feeding control on the circuit board 2 formed to have substantially the same dimensions as the cold air outlet 11, for example, the white light emitting LED lamp 3, and the LED lamp 3. It is comprised from the control apparatus 4 which also controls the heater 12 for condensation prevention provided in the said cold air blower outlet 11. FIG.

  The circuit board 2 is preferably formed using a member having good thermal conductivity such as metal, and the surface on the side where the LED lamp 3 is attached is formed of, for example, a film-like polyimide resin. The flexible printed circuit board 2a is attached closely by sticking or the like, and the circuit pattern 2c formed on the flexible printed circuit board 2a can be attached to the LED lamp 3 and supplied with power. Needless to say, if the circuit board 2 has good thermal conductivity and insulation, the flexible printed circuit board 2a may be omitted and a circuit may be formed directly on the circuit board 2. Absent.

  The above configuration will be described more specifically. If the cold air outlet 11 has a width of, for example, 50 mm, a length of, for example, 800 mm, and a plate thickness of 1 mm, the circuit board 2 has substantially the same dimensions. It is formed. At this time, in order to fit the circuit board 2 to the front surface of the cold air outlet 11 and fix it, it is free to provide an appropriate dimensional difference between them. In addition, what is shown by the code | symbol 11a in a figure is a metal frame which forms the external shape of the cold air blower outlet 11, and what is shown by 11b is a partition plate which partitions off the inside of the said metal frame 11a.

  In this embodiment, the circuit board 2 is provided with blow holes 2b of 40 mm × 40 mm at intervals of 50 mm in the longitudinal direction. By forming the circuit board 2 in this way, the circuit board 2 has a substantially ladder shape having a width of 5 mm in the longitudinal direction and a width of 10 mm between the cold air outlet openings 2b.

  In this way, in the present invention, for example, a surface mount type LED lamp 3 is attached to the formed circuit board 2 between the blowout holes 2b, and each LED lamp 3 is attached to the circuit board 2. Attachment and electrical connection are performed by a circuit pattern 2c formed using the substantially ladder-like shape of the adhered flexible printed circuit board 2a, and driving is performed by the control device 4.

  FIG. 2 shows a cross section taken along the line AA of FIG. 1. By adopting such a configuration according to the present invention, first, the cold air outlet 11 and the lighting device 1 are arranged. The front position of the lowermost shelf of the multistage refrigerated open showcase 10, which is the same position and has been conventionally difficult to illuminate due to the relatively strong directional light from the LED lamp 3. Since lighting can be performed, the lighting effect is improved, and it is effective for encouraging consumers to purchase.

  Second, also in the multistage refrigerated open showcase 10 according to the present invention, a dew condensation prevention heater 12 is provided in the vicinity of the cold air outlet 11. When the LED lamp 3 is turned on, the energization of the dew condensation prevention heater 12 is stopped by the control circuit 4.

  This is because the cold air outlet 11 and the circuit board 2 on which the LED lamp 3 is mounted are provided in close contact with each other according to the present invention, so that the heat generated by the LED lamp 3 is directly conducted to the cold air outlet 11. In the above embodiment, the luminous efficiency of the LED lamp 3 is 50 lm / W, the external quantum efficiency is about 20%, and most of the remaining energy is generated as heat. Here, as the dew condensation prevention heater 12, the output of about 10 W has been conventionally used, so about 1 LED chip 3 of 1 W chip type can expect the same dew condensation prevention effect. It becomes.

  When the business hours are over and the LED lamp 3 is turned off, the control circuit 4 turns on the dew condensation prevention heater 12. Therefore, the dew condensation prevention heater 12 prevents dew condensation except during business hours, and it is possible to prevent inconveniences such as dew dropping on the product when the business is resumed the next day and the product value being lowered.

  Therefore, in recent years, the lighting device 1 of the present invention has a power saving effect at the same time, assuming that the dew condensation prevention heater 12 is not used during an overwhelmingly long business hours, for example, 24 hours at a convenience store. To do things.

  FIG. 3 shows a second embodiment of the present invention. In the previous embodiment, for example, when the cold air outlet 11 is in contact with or close to a part of the main body case 13, Depending on the position where the dew condensation prevention heater 12 is provided, dew condensation may occur on the surface of the main body case 13 and the like.

  In such a case, the heat transfer sheet 5 is configured such that an adhesive is applied to one side of the metal sheet on the lower surface of the circuit board 2, that is, the surface opposite to the side where the LED lamp 3 is attached. If one end is attached and the other end is extended to a portion where condensation occurs in the main body case 13, the attachment of the main body case in the vicinity of the cold air outlet 11 can be prevented.

  FIG. 4 shows a third embodiment of the present invention. The LED lamp 3 described above emits white light with a color mixture of light from a blue light emitting LED and light from a yellow light emitting phosphor. Therefore, for example, when a red product is illuminated, the color rendering property may be inferior compared with a fluorescent lamp conventionally used.

  Therefore, R (red), G (green), and B (blue) three-color primary color LED lamps 3r, 3g, and 3b are also attached. For example, manual switches 4a provided on the control device 4 for meat or the like. The LED lamp 3r emitting red light is also turned on. For vegetables and the like, the LED lamp 3g emitting green light may be turned on to improve color rendering. In the present invention, the emission color of the single color LED lamp is not limited to the three primary colors R, G, and B, and other emission colors can be freely attached, and the number of colors to be added is limited to three. It's not something to do.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view showing a first embodiment of a lighting device for an open showcase for multistage refrigeration according to the present invention. It is sectional drawing which follows the AA line of FIG. It is explanatory drawing which similarly shows the 2nd Example of the illuminating device which concerns on this invention. It is explanatory drawing which similarly shows the 3rd Example of the illuminating device which concerns on this invention. It is a schematic sectional drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Illuminating device 2 ... Circuit board 2a ... Flexible printed circuit board 2b ... Outlet 2c ... Circuit pattern 3 ... LED lamp 3r ... Red light emitting LED lamp 3g ... Green light emitting LED lamp 3b ... Blue light emitting LED lamp 4 ... Control Device 4a ... Manual switch 5 ... Heat transfer sheet 10 ... Multi-stage refrigerated open showcase 11 ... Cool air outlet 11a ... Metal frame 11b ... Partition plate 12 ... Condensation prevention heater 13 ... Main body case

Claims (3)

  A lighting device for an open showcase for multi-stage refrigeration, and in a lighting device for general illumination provided in the vicinity of the cold air outlet at the top of the showcase, the lighting device has substantially the same dimensions as the cold air outlet. A multi-stage type LED lamp which is formed between the blow holes on a circuit board which is formed so as to cover the cool air blow outlets with blow holes provided at appropriate intervals. Lighting device for open showcase for refrigeration.   A dew condensation prevention heater is provided in the vicinity of the cold air outlet. When the lighting device is turned on, power supply to the dew condensation prevention heater is stopped, and when the lighting device is turned off, power supply to the dew condensation prevention heater is started. The lighting device for an open showcase for multi-stage refrigeration according to claim 1, wherein a control device is provided.   In addition to the white light emitting LED lamp, the lighting device is provided with an LED lamp and a control device capable of simultaneously lighting one or more types of at least three primary color LED lamps. The lighting device for an open showcase for multistage refrigeration according to claim 1 or 2.

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