JP2008079819A - Showcase - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a show case where proper illumination is easily obtained according to merchandise articles displayed in a display chamber. <P>SOLUTION: The showcase 1 includes: the display chamber 11 for displaying the merchandise articles; and an illuminator 38 for illuminating inside of the display chamber 11. The illuminator 38 is composed of three-primary-color LEDs 41 each consisting of a red LED 41R, a green LED 41G, and a blue LED 41B, and includes a controller 48 which PWM-controls current flowing through each of the red LED 41R, the green LED 41G, and the blue LED 41B respectively to perform illumination with the light of proper color rendering property according to the displayed merchandise articles. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a showcase provided with a display room for displaying products and a lighting device for illuminating the display room.

  Conventionally, this type of showcase, for example, as shown in Patent Document 1, by discharging cool air from the discharge port formed at the upper edge of the opening of the heat insulating wall having a substantially U-shaped cross section toward the suction port at the lower edge of the opening, An air curtain is formed in the opening, and the display chamber surrounded by the heat insulating wall is cooled to a predetermined temperature. A plurality of fluorescent lamps are illuminated outside the upper edge of the opening or on both sides of the opening and under the shelf to illuminate the display room and the showcase itself.

  Usually, a fluorescent lamp is used as an illuminating device that cools the interior of the cabinet as shown in Patent Document 1 and illuminates the products displayed in the cooling environment. As the fluorescent lamp, for example, FL4, FL6, FL8, FL10 and the like according to JIS (Japanese Industrial Standards) C7601 are adopted, and each of them has an elongated cylindrical shape. Therefore, the fluorescent lamp is attached by being locked to a holder attached to the display chamber side.

  When the AC power supply AC is turned on, the fluorescent lamp causes the starter to conduct for a certain period of time and allows a current to flow through the filament of the fluorescent lamp. And after a filament is heated, a ballast applies a high voltage between filaments by interrupting a starter. This high voltage causes a discharge between both filaments, which causes the fluorescent lamp to emit light. Once emitted, the fluorescent lamp continues to emit light by the ballast.

  An object that emits light by itself such as a fluorescent lamp, that is, a light source, has a different light emission color, and can express a light source color by a color temperature (K: Kelvin). For example, the fluorescent lamp has a white color, white white color, etc., 4000K to 7000K, the halogen bulb has about 3200K, and the bulb has about 2800K. In general, light emitted from a material having a low color temperature is red, and becomes white as the color temperature becomes higher, and becomes blue when the color temperature becomes higher. Therefore, the light emitted from the light bulb is reddish, and the halogen light bulb has a white temperature higher than that of the light bulb.

In recent years, by combining various light emissions created from artificial light such as fluorescent lamps, light is concentrated in the three wavelength regions of blue, green, and red, which have a strong color vision response, thereby improving illuminance and color rendering. Fluorescent lamps are being developed. That is, by using a fluorescent lamp in which more light is concentrated in the red wavelength region for illumination of the display room in the showcase, it is possible to produce a product such as meat displayed in the display room in a red color. In addition, by using a fluorescent lamp in which more light is concentrated in the green wavelength region for illumination of the display room, it is possible to produce products such as blue objects displayed in the display room in a greener manner.
JP-A-5-317146

  However, in stores such as supermarkets, even if vegetables, meat, and seafood are displayed, multiple showcases of the same type are installed for versatility. Therefore, in order to effectively illuminate the products displayed in the display room of the showcase, it is necessary to select and install a fluorescent lamp having color rendering properties according to the type of the product.

  Therefore, there is a problem that the store must have a plurality of types of fluorescent lamps that can realize color rendering properties according to the type of product. In addition, if the dedicated fluorescent lamps are not used, the color rendering properties of the fluorescent lamps may have an adverse effect on the product display. Therefore, in order to obtain an appropriate color rendering effect, there have been problems that cost increases and lighting management work becomes complicated.

  Therefore, the present invention has been made to solve the conventional technical problems, and provides a showcase capable of easily realizing appropriate lighting in accordance with products displayed in a display room.

  The showcase of the present invention includes a display room for displaying products and a lighting device for illuminating the display room, and the lighting device is composed of three primary color LEDs of a red LED, a green LED, and a blue LED. And a control device for controlling the current flowing through each LED.

  The showcase of the invention of claim 2 is characterized in that, in the above-mentioned invention, the control device emphasizes the color rendering of the color suitable for the product displayed in the display room by controlling the current flowing through each LED. And

  The showcase of the invention of claim 3 is characterized in that, in the above-mentioned invention, the control device discriminates the product from the identification information attached to the product.

  According to a fourth aspect of the present invention, in each of the above inventions, the control device receives instruction data transmitted from the outside, and controls the current flowing through each LED based on the instruction data. .

  According to the present invention, in a showcase provided with a display room for displaying merchandise and a lighting device for illuminating the display room, the lighting device is composed of three primary color LEDs of a red LED, a green LED, and a blue LED. Since the control device for controlling the current flowing through each LED is provided, the color rendering property of the light emitted from the lighting device can be changed by changing the current supplied to each LED.

  For this reason, the control device according to claim 2 can emphasize the color rendering of the color suitable for the product displayed in the display room by controlling the current flowing through each LED. An effect can be effectively produced by the lighting device.

  Thereby, it becomes possible to make green things, such as vegetables, appear more brilliant by increasing the energization current to the green LED, and by increasing the energization current to the red LED, for example, the reddish portion of meat is made more red. It becomes possible to show. In addition, by increasing the energization current to the blue LED, for example, it is possible to make seafood look more fresh. Thus, it becomes possible to improve the display effect of goods by changing color rendering property according to the kind of goods.

  According to the invention of claim 3, in the above invention, the control device can control the current flowing through each LED corresponding to the product by determining the product from the identification information attached to the product. Become. Therefore, effective lighting can be realized only by displaying the product in the display room. Therefore, it is not necessary to change the color rendering properties, and convenience can be improved.

  According to the invention of claim 4, in each of the above inventions, the control device receives the instruction data transmitted from the outside, and controls the current flowing through each LED based on the instruction data, thereby externally Therefore, it is possible to change the color rendering properties of the lighting devices in each display room, and it becomes possible to manage the lighting devices collectively.

  This eliminates the need to change the color rendering properties of each lighting device at the site where the showcase is installed, thereby improving convenience.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a showcase 1 of the present invention, and FIG. 2 is a longitudinal side view of the showcase 1. The showcase 1 of the present invention includes a heat insulating wall 2 having a substantially U-shaped cross section and side plates 3 and 3 attached to both sides of the heat insulating wall 2. A partition plate 4 is attached to the inside of the heat insulating wall 2 with an interval between each other, and a duct 7 is formed between the partition plate 4 and the heat insulating wall 2.

  A deck pan 9 as a bottom plate is provided at the bottom of the partition plate 4, and the inside of the partition plate 4 and the deck pan 9 serves as a display chamber 11. A discharge port 16 to which a honeycomb material 13 is attached is formed at the upper edge of the front opening 12 of the heat insulating wall 2, and a suction port 18 is provided at the lower edge of the opening opposite to the discharge port 16. The discharge port 16 and the suction port 18 communicate with the duct 7 respectively.

  On the other hand, a fan case 23 is installed on the bottom wall 2 </ b> A of the heat insulating wall 2, and a blower 24 is attached to the fan case 23. A cooler 27 of a cooling device is vertically installed in the duct 7 behind the partition plate 4. When the blower 24 is operated, the cool air exchanged with the cooler 27 is raised in the duct 7, and the discharge port 16 is discharged toward the suction port 18. Then, the cool air sucked from the suction port 18 is accelerated again by the blower 24. As a result, an air curtain is formed in the opening 12, and a part of the cool air curtain is circulated in the display chamber 11 to cool the display chamber 11.

  Support columns 28 are positioned on the backs on both sides of the display chamber 11, and a plurality of engagement holes 29 are formed in front of the rear side of the columns 28 at predetermined intervals. The rear ends of a plurality of brackets 31 are detachably engaged with the engagement holes 29, and a shelf 32 is attached to each of the pair of left and right brackets 31 and 31, and the display chamber 11 includes It is erected.

  A machine room 6 is formed below the bottom wall 2A of the heat insulating wall 2. In the machine room 6, a condenser 30 that forms a so-called refrigerant cycle with the cooler 27, a compressor (not shown), and the like. Is provided. A condenser blower 33 is attached to the rear of the condenser 30, and a grill 5 is formed on the front surface of the machine room 6. Air is sucked from the grill 5, and waste heat is discharged to the outside from the rear. (See FIG. 2).

  On the other hand, FIG. 3 shows a partial longitudinal side view of the shelf 32. A price rail 35 for holding a price tag or the like is attached to the front surface of the shelf 32, and a fixture 36 having a substantially U-shaped cross section having an opening inward is attached to the lower surface of the price rail 35. ing. Further, on the lower surface of the front portion of the shelf 32, a fixture 37 having a substantially U-shaped cross section having an opening below is attached to the rear of the fixture 36. Both ends of the opening surfaces of the fixtures 36 and 37 are formed by being slightly bent toward the inside. In the opening surfaces of the fixtures 36 and 37, lighting devices 38 and 39 using light emitting diodes (hereinafter referred to as LEDs) as light sources are housed, respectively. Details of the lighting device 38 and the like will be described later.

  FIG. 4 shows a vertical side view below the display chamber 11. As described above, the deck pan 9 is attached above the bottom wall 2 </ b> A of the heat insulating wall 2 with a gap for the duct, and a cold air inlet 18 is provided in front of the deck pan 9. Here, an opening 43 is formed in the left-right direction between the front end of the deck pan 9 and the suction port 18. The opening 43 is illuminated in the same manner as the illumination device 38 so as to illuminate the upper part. A device 44 is attached. At this time, the lighting device 44 is mounted so that the upper surface thereof is substantially flush with the upper surface of the deck pan 9.

  A handrail 45 is formed on the lower edge of the opening 12 of the heat insulating wall 2 (not shown in FIG. 2). The handrail 45 is formed lower from the front end toward the rear, and an opening 46 is formed on the left and right. An illumination device 47 configured in the same manner as the illumination device 38 is attached to the opening 46. The vertical and horizontal dimensions of the lighting device 47 may be smaller than that of the lighting device 38.

  Further, an opening (not shown) is formed on the lower surface of the front portion of the partition plate 4 forming the discharge port 16 at the rear of the discharge port 16 in the left-right direction so that the lower side is illuminated. A lighting device 48 configured in the same manner as the lighting device 38 is attached.

  Next, the detailed configuration of each of the lighting devices 38, 39, 44, 47, 48 will be described with reference to FIGS. Hereinafter, the illumination device 38 will be described as an example, but it is assumed that the illumination devices 39, 44, 48, and 48 have the same configuration as described above.

  The illuminating device 38 in the present embodiment is configured by a plurality of three primary color LEDs 41 arranged on a rectangular substrate 40 as shown in the schematic configuration explanatory diagram of the illuminating device 38 in FIG. 5, and each of the three primary color LEDs 41 is a red LED 41R. , Green LED 41G and blue LED 41B. As shown in FIG. 6, each red LED 41R constituting the three primary color LEDs 41 is connected in series, and one end of the path in which the plurality of red LEDs 41R are connected in series is connected to the PWM circuit 42R constituting the LED control unit. Connected. Similarly, the green LEDs 41G constituting the three primary color LEDs 41 are connected in series, and one end of the path where the plurality of green LEDs 41G are connected in series is connected to the PWM circuit 42G constituting the LED control unit. In addition, each blue LED 41B constituting the three primary color LEDs 41 is connected in series, and one end of the path where the plurality of blue LEDs 41B are connected in series is connected to a PWM circuit 42B constituting the LED control unit.

  On the other hand, the control device 48 includes an LED control unit 49 configured by the PWM circuits 42R, 42G, and 42B, and a constant voltage power supply unit 50, and an illumination device 38 is provided on the input side of the control device 48. A control panel 51 for changing the color rendering properties (color rendering pattern) is connected.

  The constant voltage power supply unit 50 includes an AD converter and converts alternating current from an external alternating current power supply AC into direct current. The direct-current power output from the constant voltage power supply unit 50 is supplied to the LED control unit 49 and supplied to the LEDs 41R, 41G, and 41B via the PWM circuits 42R, 42G, and 42B.

  Each PWM circuit 42R, 42G, 42B constituting the LED control unit 49 includes a constant voltage power supply unit 50, a path to which each red LED 41R is connected, a path to which each green LED 41G is connected, and a path to which each blue LED 41B is connected. And a switch for conducting or interrupting the current flowing between them. Then, by controlling the switching of these switches by PWM control, the currents flowing through the respective red LEDs 41R, green LEDs 41G, and blue LEDs 41B are controlled.

  Pulse signals for PWM control in each of the PWM circuits 42R, 42G, and 42B are generated based on the color rendering pattern input from the control panel 51. That is, the control panel 51 can input color rendering patterns such as red color rendering, green color rendering, and blue color rendering in the lighting device 38. Based on the input of the color rendering pattern, the energization current to each LED 41R, 41G, 41B of the illumination device 38 is controlled.

  Here, the emission colors obtained by the three primary color LEDs 41 differ depending on the currents that are respectively supplied to the red LEDs 41R, the green LEDs 41G, and the blue LEDs 41B. For example, FIG. 7 is a diagram showing the three primary colors of light, and colors are synthesized by superimposing red (R), green (G), and blue (B) light components. When the RGB ratio is changed, the properties of the obtained light are changed. For example, when RGB is synthesized at substantially the same ratio, white (W) light is obtained. Here, by increasing the ratio of red (R) more than green (G) blue (B), the resulting light becomes more red, and the ratio of green (G) than red (R) blue (B). By making more, the light obtained will be greener and by increasing the ratio of blue (B) than red (R) green (G), the light obtained will be more blue.

  In the present embodiment, the product displayed in the display room 11 is illuminated in a state closer to natural light. Therefore, even if any color rendering property is selected, FIG. Light that does not exit the white area as shown. That is, as shown in FIG. 8, the control device 48 looks white when the current supplied to the red LED 41R is larger than the current supplied to the other green LEDs 41G and the blue LEDs 41B and the light itself is viewed. In the case where a pulse train pattern that constitutes light (light at a point RL in FIG. 7) that has a ratio is stored in advance and illuminated with red color rendering light, specifically, the control panel 51 displays red light. When the color rendering property is input, a pulse signal is generated in accordance with a red color rendering property pulse train pattern stored in advance in an oscillation circuit provided in the control device 48.

  Similarly, as shown in FIG. 9, the control device 48 makes the energization current to the green LED 41G larger than the energization current to the other red LEDs 41R and the blue LEDs 41B, and turns white when the light itself is viewed. When the pulse train pattern that constitutes the light that can be seen (light at the point GL in FIG. 7) is stored in advance and illuminated with green color rendering light, specifically, the control panel 51 When the green color rendering property is input, a pulse signal is generated by an oscillation circuit provided in the control device 48 in accordance with a previously stored green color rendering property pulse train pattern.

  In addition, as shown in FIG. 10, the control device 48 looks white when the current supplied to the blue LED 41B is larger than the current supplied to the other red LEDs 41R and the green LEDs 41G and the light itself is viewed. In the case where a pulse train pattern constituting light having a ratio (light at point BL in FIG. 7) is stored in advance and illuminated with blue color rendering light, specifically, the control panel 51 uses blue light. When the color rendering property is input, a pulse signal is generated by an oscillation circuit provided in the control device 48 in accordance with a previously stored green color rendering property pulse train pattern.

  Note that the control device 48 according to the present embodiment also stores in advance a pulse train pattern that constitutes light of a color closer to natural light, and specifically illuminates with light having no color rendering properties, specifically, the control panel 51. When non-rendering property is input at, a pulse signal is generated by an oscillation circuit provided in the control device 48 in accordance with a pre-stored non-rendering pulse train pattern.

  Accordingly, it is possible to change the color rendering properties of light emitted from each lighting device 38 and the like by operating the control panel 51 in accordance with the type of goods displayed in the display room 11. In particular, in this embodiment, the control device 48 controls the currents flowing through the LEDs 41R, 41G, and 41B, respectively, thereby emphasizing the color rendering properties suitable for products that are easily displayed in the display room 11. Is possible. Thereby, even if the product displayed in the display room 11 is changed, an effective presentation by the lighting device 38 and the like can be smoothly performed without replacing the lighting device.

  For example, by increasing the energization current to the green LED 41G, it becomes possible to make a green product such as vegetables appear more brilliant, and by increasing the energization current to the red LED 41R, for example, a red portion of meat or tomato It is possible to make red vegetables look more red. Further, by increasing the energization current to the blue LED 41B, for example, the seafood can be made more fresh. Thus, it becomes possible to improve the display effect of goods by changing color rendering property according to the kind of goods.

  Further, in this embodiment, the color rendering property light executed by each color rendering pattern is white in appearance, and it is possible to make the illumination object appear red, green, or blue. Production by light is possible, and effective illumination can be realized.

  In the present embodiment, by operating the control panel 51 and inputting each color rendering pattern, illumination with light of color rendering properties corresponding to the products displayed in the display room 11 is realized. For example, as shown in FIG. 11, color rendering light may be emitted from the lighting device 38 or the like based on information from the identification tag 54 attached to the product.

  In this case, the control device 48 includes a receiving unit (identification information discriminating unit) 53 on any product mounting surface of the illumination part of the lighting device to be controlled, and product information is displayed on the product displayed in the display room 11. An identification tag 54 is attached. Then, when the product information is input to the receiving unit 53 by the identification tag 54, the control device 48 discriminates the received product and realizes illumination with color rendering light corresponding to the product. Is possible.

  Thereby, the control apparatus 48 can control the electric current which flows into each LED according to the said goods by discriminating the said goods from the identification information attached | subjected to the goods. Therefore, effective lighting can be realized only by displaying the product in the display room 11. Therefore, it is not necessary to change the color rendering properties, and convenience can be improved.

  In addition to this, as shown in FIG. 12, in general, by a centralized management device 55 for collectively managing temperature control of a showcase installed in a store, lighting on / off of a lighting device, and the like, Illumination with color rendering light by each lighting device of the showcase may be performed. The central control device 55 and the control device 48 provided in the showcase 1 can communicate with each other by wire or wireless.

  Thereby, the control device 48 receives the instruction data transmitted from the centralized management device 55, and controls the current flowing through each LED of each lighting device based on the instruction data, thereby easily using the lighting device. It becomes possible to change the color rendering. Thereby, management of the illuminating device collectively becomes possible. Therefore, it is not necessary to change the color rendering property of each lighting device at the site where the showcase 1 is installed, and the convenience can be improved. In the present embodiment, the color rendering property of each lighting device can be changed by the centralized management device 55 installed in the same store. However, the present invention is not limited to the centralized management device 55, and is a showcase. 1 is not limited to this as long as it can communicate instruction data from the outside (external input means).

  In each of the above-described embodiments, the lighting device 38 and the like are constituted by LEDs, so that the low-temperature characteristics are superior to the conventional fluorescent lamp, and the comparison is as in the low-temperature showcase as in this embodiment. Even when used in a low temperature environment, a decrease in illuminance can be avoided. This also makes it possible to improve the lighting effect.

It is a perspective view of a showcase. It is a vertical side view of a showcase. It is a partial vertical side view of a shelf. It is a partial vertical side view of the lower part of a showcase. It is schematic structure explanatory drawing of an illuminating device. It is a schematic circuit block diagram of an illuminating device. It is a figure which shows the three primary colors of light. It is a figure which shows the pattern of the pulse train of each LED of red color rendering property. It is a figure which shows the pattern of the pulse train of each LED of green color rendering property. It is a figure which shows the pattern of the pulse train of each LED of blue color rendering property. It is a schematic circuit block diagram of the illuminating device of another Example. It is a schematic circuit block diagram of the illuminating device of another another Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Showcase 2 Heat insulation wall 11 Storage room 12 Front opening 32 Shelf 38, 39, 44, 47, 48 Illumination device 40 Board | substrate 41 Three primary color LED (light emitting diode)
41R Red LED
41G green LED
41B Blue LED
42R, 42G, 42B PWM circuit 48 control device 49 LED control unit 50 constant voltage power supply unit 51 control panel 53 reception unit (identification information discrimination unit)
54 Identification tag 55 Centralized management device (external input means)

Claims (4)

In a showcase provided with a display room for displaying products and a lighting device for illuminating the display room,
The illuminating device is composed of three primary color LEDs of a red LED, a green LED, and a blue LED, and includes a control device that controls currents flowing through the LEDs.   2. The showcase according to claim 1, wherein the control device emphasizes color rendering properties suitable for products displayed in the display room by controlling currents flowing through the LEDs.   The showcase according to claim 2, wherein the control device discriminates the product from the identification information attached to the product.   The said control apparatus receives the instruction | indication data transmitted from the outside, and each controls the electric current which flows into each said LED based on the said instruction | indication data, The Claim 1 thru | or 3 characterized by the above-mentioned. Showcase.

Images