JP2011072496A - Low-temperature showcase - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-temperature showcase where power consumption of the whole showcase is reduced and the whole inside of a display chamber is effectively illuminated. <P>SOLUTION: In the low-temperature showcase 1 where the display chamber 11 is constituted within a body and the inside of the display chamber 11 is cooled, LED lights 22 lighting the inside of the display chamber 11 are provided within the display chamber 11, and heat radiation means (a heat transmission member 25, a shelf board 32, a top board 4A, a side board 5, and a back surface board 2C) which discharge heat generated from the LED lights 22 to the outside of the display chamber 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a low-temperature showcase in which a display room is formed in a main body, and products are displayed while being cooled in the display room, and particularly relates to lighting in the display room.

  Conventionally, this type of showcase discharges cold air curtain 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, thereby providing a cold air curtain to the opening. The display chamber formed and surrounded by the heat insulating wall is cooled to a predetermined temperature (see Patent Document 1). A plurality of fluorescent lamps are attached to the canopy located outside the upper edge of the opening, both side edges of the opening, the lower surface of the front of the shelf, and the like to illuminate the display room and the showcase itself.

  However, in the conventional configuration, a heat load is generated in the display chamber due to illumination by the fluorescent lamp. Generally, a fluorescent lamp is used as illumination by converting electric energy into visible radiation, infrared radiation, and ultraviolet radiation and emitting visible light. At this time, heat loss occurs, so that there is a problem that not only the fluorescent lamp itself but also the display room is heated by the radiant heat from the fluorescent lamp. For this reason, energy efficiency is poor, and in a low-temperature showcase that cools the display room to a predetermined temperature, the cooling efficiency is lowered, leading to an increase in power consumption.

  In addition, the fluorescent lamp is forced to be replaced due to a decrease in luminance or lighting failure due to aging. Therefore, the user is forced to replace the fluorescent lamp, and there is a problem that the operation becomes complicated. It was also necessary to keep a new fluorescent lamp for replacement.

  Therefore, in recent years, the display room has been illuminated by LED lighting that employs LED elements that are advantageous in terms of maintenance workability because of lower power consumption and longer life (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 5-146346 JP 2008-206660 A

  However, in the configuration described in Patent Document 2 as described above, LED lighting is provided at the upper edge of the front opening of the display room, and the display room is illuminated from above. Although it was possible to illuminate the face of the product displayed on the front, the shelf device installed on the upper side would be a shadow, and the irradiation light would not reach the rear of the shelf device. There was a tendency for the back of the case to become dark.

  Further, in such a showcase, the shelf board itself is made of a transparent material, and a light incident portion that receives light emitted from the LED illumination from above is provided at the front end of the shelf board, and is reflected by the light incident portion. The configuration is adopted in which the reflected light is diffusely reflected in the shelf plate and the shelf itself emits light.

  However, in the LED lighting provided at the upper edge of the front opening of the display room, there is a predetermined distance to each shelf, so that a sufficient amount of light cannot be delivered to the light incident part at the front end of the shelf, and as a result It was difficult to perform effective lighting up to the rear of the shelf.

  The present invention has been made to solve the conventional technical problems, and can reduce the power consumption of the entire showcase and can effectively illuminate the entire display room. Provide a showcase.

  In order to solve the above problems, the low-temperature showcase of the present invention comprises a display room in the main body and is cooled by the display room, and LED lighting for illuminating the display room is provided in the display room. In addition, the heat radiation means for discharging the heat generated from the LED illumination to the outside of the display room is provided.

  According to a second aspect of the present invention, in the above invention, the main body comprises a U-shaped heat insulating wall and side plates on both sides, and the heat radiating means is constituted by a heat transfer member attached to the LED lighting and the side plates in a heat exchange relationship. It is characterized by.

  According to a third aspect of the present invention, in the first aspect of the present invention, the main body comprises a U-shaped heat insulating wall and side plates on both sides, and exchanges heat between the LED lighting and the rear plate of the heat insulating wall that constitutes the back of the display room. The heat dissipating means is constituted by the heat transfer member attached in the relationship.

  The invention of claim 4 is characterized in that, in each of the above-mentioned inventions, a plurality of product display shelves erected in the display chamber are provided, and LED lighting and heat radiation means are attached to the lower surface of the shelf.

  The invention of claim 5 is characterized in that, in each of the above inventions, a diffusion lens for diffusing light from LED illumination is provided.

  According to a sixth aspect of the present invention, in the first to fourth aspects of the present invention, a light guide material that guides light from the LED illumination to a predetermined position is provided.

  According to the present invention, in a low temperature showcase in which a display room is formed in the main body and the display room is cooled, LED lighting for illuminating the display room is provided in the display room, and heat generated from the LED lighting is provided. By providing a heat radiating means for discharging the outside of the display room, for example, as shown in the invention of claim 4, it becomes possible to provide LED lighting on the lower surface of the shelf for displaying the product installed in the display room, and a sufficient amount of light It becomes possible to illuminate the products displayed on the shelf. As a result, the display effect can be significantly improved.

  In this case, since the heat generated from the LED lighting can be discharged outside the display room by the heat radiating means, the heat can be efficiently released to the outside of the display room, and the heat load in the display room related to lighting is minimized. It is possible to prevent the cooling efficiency of the low-temperature showcase itself from being lowered due to the heat load. As a result, the running cost of the entire low-temperature showcase can be reduced.

  In addition, compared with a conventional showcase in which a fluorescent lamp is mounted in the display room, the heat load generated in the display room can be significantly reduced, and the amount of power consumption can be reduced.

  According to the invention of claim 2, in addition to the above-mentioned invention, the main body comprises a U-shaped heat insulating wall and side plates on both sides, and is provided by a heat transfer member attached to the LED lighting and the side plates in a heat exchange relationship. By configuring the heat dissipating means, it is possible to discharge the heat generated from the LED illumination from the side plate to the outside of the display chamber via the heat transfer member provided with the LED illumination.

  According to the invention of claim 3, in addition to the invention of claim 1 above, the main body is composed of a U-shaped heat insulating wall and side plates on both sides, and the LED lighting and the heat insulating wall constituting the back of the display room By configuring the heat dissipation means with a heat transfer member attached to the back plate in a heat exchange relationship, the heat generated from the LED lighting is discharged from the back plate to the outside of the display room via the heat transfer member provided with the LED lighting. It becomes possible to do.

  According to the invention of claim 4, in each of the above-mentioned inventions, a plurality of product display shelves installed in the display room are provided in a plurality of stages, and LED lighting and heat radiation means are attached to the lower surface of the shelf, whereby the lower surface of the upper shelf The entire shelf top can be effectively illuminated by the LED lighting attached to the shelf, and the display efficiency of the products displayed on the shelf can be improved.

  According to the invention of claim 5, in addition to each of the above inventions, by providing a diffusion lens for diffusing the light from the LED illumination, the light from the less LED illumination is diffused by the diffusion lens, thereby irradiating light. The area can be enlarged, and effective illumination can be realized.

  According to the invention of claim 6, in the inventions of claims 1 to 4, an illumination effect that emphasizes a specific product by providing a light guide material that guides light from LED illumination to a predetermined position. And effective lighting of the shelf itself. As a result, it is possible to illuminate a specific product displayed in the display room vividly, improve the product image, and increase the customer's willingness to purchase.

It is a vertical side view of the low-temperature showcase to which this invention is applied. It is a schematic block diagram of LED illumination. It is a figure which shows the attachment state of LED illumination. It is explanatory drawing which shows the comparison of illumination efficiency. It is explanatory drawing which shows the illumination state by LED illumination.

  Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 shows a longitudinal side view of a low-temperature showcase 1 to which the present invention is applied. The low-temperature showcase 1 is a vertical low-temperature showcase installed in, for example, a store such as a supermarket, and is attached to the side surface of the heat insulation wall 2 at the installation site, and a heat insulation wall 2 having a substantially U-shaped cross section that opens to the front. The main body 3 is composed of the side plates 5 and 5.

  A top plate 4A is attached to the inside of the top surface of the heat insulating wall 2 of the low temperature showcase 1 with a space therebetween, and a back partition plate 4B is similarly attached to the inside of the back surface of the heat insulating wall 2 with a space therebetween. ing. Between the top plate 4 </ b> A and the back partition plate 4 </ b> B and the heat insulating wall 2, an inner and outer two-layer duct (not shown) is formed. A bottom plate 9 is attached in front of the lower end of the back partition plate 4B with a gap for a duct between the bottom wall 2A of the heat insulating wall 2 and the top plate 4A, the back partition plate 4B, and the bottom plate 9 The inside is a display room 11. In the present embodiment, in particular, the top plate 4A is composed of a thermally conductive steel plate or the like, and at least a part thereof is in contact with the side plates 5 and 5 and is provided in a heat exchange relationship.

  In the display chamber 11, the height and the mounting angle can be changed, and a pair of brackets 31 attached to a column (not shown) on the back of the display chamber 11 and a shelf that forms a shelf for displaying products together with these brackets 31. The board 32 is constructed over a plurality of stages. At this time, the shelf board 32 is made of a heat-conductive material, and at least a part of both side edges is in contact with the side boards 5 and 5. Moreover, it is not limited to this, It is good also as what is provided in the heat exchange relationship with the side plates 5 and 5 via the support | pillar and bracket 31 which were comprised with the heat conductive material.

  Further, a price rail 34 formed of hard synthetic resin is attached to the front edge of the shelf board 32, and the price rail 34 also serves as a decorative body of the shelf board 32. A predetermined interval is formed between the front wall of the shelf plate 32 and the price rail 34, and a guard 35 is attached to the interval to prevent the products on the shelf plate 32 from falling. .

  An inner layer discharge port 16 and an outer layer discharge port 17 to which honeycomb materials 13 and 14 are respectively attached are arranged in parallel at the upper edge of the front opening 12 of the heat insulating wall 2. The inner layer discharge port 16 and the outer layer discharge port 17 are The inner layer duct and the outer layer duct communicate with each other. Further, an inner layer suction port 18 and an outer layer suction port 19 are arranged in parallel at the lower edge of the opening 12.

  On the other hand, a plurality of blowers (not shown) corresponding to the inner layer duct and the outer layer duct are installed on the bottom wall 2A of the heat insulating wall 2 at the lower rear portion of the bottom plate 9.

  A cooler 39 of a cooling device is vertically installed in the inner layer duct behind the inner partition plate 10, and when the blower corresponding to the inner layer duct is operated, the cold air exchanged heat with the cooler 39 rises in the inner layer duct. And discharged from the inner layer discharge port 16 toward the inner layer suction port 18. And the cold air sucked from the inner layer suction port 18 is accelerated again by the blower.

  On the other hand, when the blower corresponding to the outer layer duct is operated, the air in the outer layer duct is raised in the outer layer duct and discharged from the outer layer discharge port 17 toward the outer layer suction port 19. Then, the air sucked from the outer layer suction port 19 is accelerated again by the blower. Thereby, a front and rear double air curtain is formed in the opening 12, and a part of the inner cool air curtain is circulated in the display chamber 11 to cool the display chamber 11.

  A canopy 33 projecting forward is attached to the front end (upper front end) of the ceiling wall 2B of the heat insulating wall 2. The canopy 33 extends outside the front opening 12 of the display chamber 11 inside the canopy 33. The reflector 45 is attached in the state.

  Illumination devices 20 and 21 for illuminating the inside of the display chamber 11 from the upper front are attached to the front portion of the reflector 45 and the top plate 4B constituting the top wall of the display chamber 11. In this embodiment, the illumination devices 20 and 21 may be configured by LED illumination including a plurality of LED elements, or may be configured by other illumination means.

  Next, with reference to the schematic block diagram of the LED illumination 22 of FIG. 2, the LED illumination 22 provided in the low-temperature showcase 1 of a present Example is explained in full detail. In the present embodiment, LED illuminations 22 are respectively attached to the lower surface of each shelf plate 32 laid in a plurality of stages in the display chamber 11 and the lower surface of the top plate 4 </ b> B constituting the top surface of the display chamber 11.

  The LED illumination 22 is provided with a diffusion lens 26 for diffusing light on the LED element 23 side of a substrate 24 to which a chip-type white LED element 23 is attached. The configured heat transfer member 25 is provided to constitute one unit.

  In the present embodiment, the LED element 23 is disposed substantially at the center of the diffusing lens 26, and the light emitted from the LED element 23 has high directivity. The part directly entering the light is subjected to a process for diminishing the incident light, and the part other than the part is subjected to a diffusion process for efficiently diffusing the light. Yes.

  Thereby, the light irradiated from the LED element 23 is radiated | emitted substantially uniformly from the surface facing the side to which the LED element 23 of the diffusion lens 26 is attached, and the whole.

  The LED illumination 22 is in contact with the lower surface of the shelf board 32 and the lower surface of the top plate 4A made of a thermally conductive material so that the heat transfer member 25 constituting the LED illumination 22 is in a heat exchange relationship. As a result, the light emitting side surface of the diffusing lens 26 constituting the LED illumination 22 (the surface facing the light incident side surface from the LED element 23) is in the display chamber 11 or the LED illumination 22 It will be attached toward the lower side of the shelf 32 to be attached.

  In this embodiment, as shown in FIG. 3, each shelf board 32 is provided with a plurality of LED illuminations 22 in the longitudinal direction, three in FIG. 3, and the depth dimension is larger than other shelves. The LED lighting 22 is attached to the shelf plate 32 installed in the lower part of the display chamber 11 in two rows in the front-rear direction.

  With such a configuration, the heat generated in the substrate 24 by the lighting of the LED illumination 22 is transferred to the shelf board 32 and the top board 4 </ b> A via the heat transfer member 25. As shown in FIG. 3, the shelf plate 32 is provided in a heat exchange relationship with both end portions in contact with the side plates 5 and 5. Thereby, the heat from the LED lighting 22 transmitted to the shelf plate 32 and the top plate 4A is radiated to the outside of the display chamber 11 from the surfaces of the side plates 5 and 5 configured in contact with the outside of the display chamber 11. Further, these side plates 5 and 5 are provided in contact with the back plate 2C constituting the back wall of the heat insulating wall 2, so that the shelf plate 32 and the top plate 4A exchange heat with the back plate 2C via the side plate 5. You may comprise so that it may become a relationship.

  Thereby, each LED illumination 22 which illuminates the inside of the display chamber 11 provided in the display chamber 11 has the substrate 24 which generates heat by the lighting of the LED element 23, the heat transfer member 25 via the heat transfer member 25. The shelf board 32, the top plate 4A, the side plate 5, and the back plate 2C to which the LED illumination 22 that constitutes the heat radiation means together with 25 is attached can be discharged out of the display chamber 11.

  Therefore, the heat from the LED lighting 22 can be efficiently released to the outside of the display room 11, and the heat load in the display room 11 related to lighting can be minimized. Thereby, it becomes possible to prevent the cooling efficiency of the low-temperature showcase 1 itself from being lowered due to the heat load. Therefore, it is possible to reduce the running cost of the low temperature showcase 1 as a whole.

  In addition, compared to a conventional showcase in which a fluorescent lamp is attached in the display room 11, the heat load generated in the display room 11 can be remarkably reduced, and the amount of power consumption can be reduced.

  Further, in the present embodiment, the shelf board 32 and the top board 4A are part of the heat dissipation means, but the invention is not limited to this. For example, the shelf board 32 and the board 24 of the LED illumination 22 are provided in a heat exchange relationship. The heat transfer member 25 is composed of a wire formed of a material having a higher thermal conductivity than others, and the side plate 5 that contacts the outside while insulating the wire from the shelf plate 32 and the top plate 4A. It is good also as a structure which discharges | emits the waste heat from LED lighting 22 out of the display room 11 by drawing out to the backplate 2C of the heat insulation wall 2, and providing the said sideplate 5 and the backplate 2C in heat exchange relation. In such a case, heat radiation into the display chamber 11 by the LED lighting 22 is suppressed, and the heat load in the display chamber 11 can be further reduced.

  In the present embodiment, the LED illumination 22 can expand the light irradiation area by diffusing the light irradiated from the LED element 23 with the diffusion lens 26. Therefore, light can be irradiated from the entire irradiation surface of the diffusion lens 26 having a predetermined area, and effective illumination can be realized. Thereby, a surface light source capable of efficiently diffusing light with a small number of LED elements 23 can be realized.

  Therefore, as shown in the illumination state diagram of FIG. 5, even in places where the installation space is limited such as the lower surface of the shelf board 32 and the lower surface of the top surface 4A as in the present embodiment, The LED illumination 22 can be provided without affecting the display space, and the product displayed on the shelf to which the LED illumination 22 is attached can be illuminated with a sufficient amount of light. As a result, the display effect can be significantly improved.

  Further, the LED illumination 22 is attached to the lower surface of the shelf board 32, whereby the entire shelf can be effectively illuminated by the LED illumination 22 attached to the lower surface of the upper shelf, and the display of products displayed on the shelf is performed. Efficiency can be improved.

  In this way, in this embodiment, each LED illumination 22 can efficiently discharge the heat generated from the substrate 24 by lighting the LED element 23 to the outside of the display chamber 11 as described above. Even in the chamber 11, a plurality of LED lights 22 can be provided.

  Here, referring to FIG. 4, the illumination efficiency to the point Q on the shelf 32 by the illumination device 20 that illuminates the inside of the display chamber 11 from the front upper side, and the LED illumination provided on the lower surface of each shelf 32 The illumination efficiency to the point Q by 22 will be described.

The direct illuminance B1 in the normal direction to the point Q of the shelf 32 (the angle is α and the height from the lighting device 20 to the point Q is h1) is the luminous intensity B1 of the point light source from the lighting device 20 is:
B1 = L1 · cos ² α / h1 ²
It is.
On the other hand, when the LED illumination 22 is a collection of point light sources, the luminous intensity L2 is a direct illuminance B2 to the point Q of the shelf 32 (the height from the LED illumination 22 to the point Q is h2).
B2 = L2 / h2 ²
It is.
At this time, the illuminance is specifically compared when the second shelf board 32 from the top is point Q as shown in FIG. In order to compare the illuminance due to the arrangement of the illumination device 20 and the LED illumination 22, the luminous intensity is set to L0 which is the same as L1 and L2, and h1 = 220 mm, h2 = 600 mm, and α = 30 °.
B1 / B2 = L0cos ² α / h1 ² ÷ L0 / h2 ²
= Cos ² α · h2 ² / h1 ²
= 0.1008
Thereby, it turns out that the illumination intensity by the LED illumination 22 provided in the lower surface of the shelf board 32 immediately above with respect to the illumination intensity by the illuminating device 20 provided in front upper direction of the display room 11 is about 10 times.

  Therefore, it can be seen that by providing the LED illumination 22 under the shelf 32, it is possible to more efficiently illuminate the product on the shelf while suppressing unnecessary light diffusion. In particular, if the light is irradiated from the outside of the display room 11, it becomes a shadow of other shelves and cannot be sufficiently irradiated to the back of the shelves to be illuminated. By providing the LED illumination 22 configured as described above, uniform illuminance to the back of the shelf can be ensured, and effective illumination can be realized.

  In this embodiment, the diffusion lens 26 is employed as a means for realizing effective diffusion of light from the LED element 23 in the LED illumination 22, but besides this, the LED element 23 constituting the LED illumination. A light guide material that guides light from the light to a predetermined position may be provided. Thereby, the illumination effect which emphasizes a specific goods, and the effective illumination of shelf itself are realizable. Therefore, the specific product displayed in the display room 11 can be vividly illuminated, the product image can be improved, and the customer's willingness to purchase can be promoted.

DESCRIPTION OF SYMBOLS 1 Low temperature showcase 2 Heat insulation wall 2A Bottom wall 2B Top wall 2C Back plate 3 Main body 4A Top plate 4B Back part partition plate 5 Side plate 9 Bottom plate 11 Display chamber 12 Front opening 22 LED illumination 23 LED element 24 Substrate 25 Heat transfer member 26 Diffuse lens 32 shelf (shelf for product display)
33 Canopy 39 Cooler

Claims (6)

In a low temperature showcase comprising a display room in the body and cooling the display room,
A low-temperature showcase characterized in that LED lighting for illuminating the display room is provided in the display room, and heat radiation means for discharging heat generated from the LED lighting to the outside of the display room is provided.   The said main body consists of the U-shaped heat insulation wall and the side plate of both sides, and comprised the said heat radiating means by the heat-transfer member attached to the said LED lighting and the said side plate in the heat exchange relationship, The said heat radiating means was comprised. Low temperature showcase described in.   The main body comprises a U-shaped heat insulating wall and side plates on both sides, and the heat radiating means is provided by a heat transfer member attached in a heat exchange relationship to the LED lighting and a back plate of the heat insulating wall constituting the back surface of the display chamber. The low-temperature showcase according to claim 1, wherein:   The shelf for goods display erected in the display room is provided in a plurality of stages, and the LED lighting and the heat radiating means are attached to the lower surface of the shelf. Low temperature showcase.   The low-temperature showcase according to claim 1, further comprising a diffusing lens that diffuses light from the LED illumination.   The low-temperature showcase according to claim 1, further comprising a light guide member that guides light from the LED illumination to a predetermined position.

Images