Open showcase

Abstract

To provide an open showcase that can dissipate heat of a heat generation source such as an illumination power source provided inside a canopy without impairing appearance design.SOLUTION: An open showcase according to the present disclosure comprises: a canopy provided above a display chamber, and overhanging frontward; an illuminating device provided below the canopy for illuminating the display chamber; and an illumination power source for supplying power to the illuminating device. The canopy is provided with: a protruding part protruding downward; a suction ventilation hole provided in a rear surface of the protruding part, and located below the illumination power source; and an exhaust ventilation hole communicating with the suction ventilation hole via a ventilation path inside the canopy, and located above the illumination power source. The illumination power source is provided in the ventilation path.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to an open showcase. [Background technology]

[0002] Patent Document 1 discloses a showcase having a lighting device attached to a canopy and a shelf board in a display room. This showcase stably holds the lighting device with a simple structure. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-172531 A Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure aims to provide an open showcase that can dissipate heat from a heat source, such as a lighting power source, provided inside a canopy without compromising the exterior design. [Means for solving the problem]

[0005] The open showcase of the present disclosure comprises a canopy provided above a display room and extending forward, a lighting device provided below the canopy for illuminating the display room, and a lighting power supply for supplying power to the lighting device, the canopy having a protrusion that protrudes downward, an intake vent provided on the rear surface of the protrusion and positioned below the lighting power supply, and an exhaust vent connected to the intake vent via a ventilation path inside the canopy and positioned above the lighting power supply, and the lighting power supply is provided in the ventilation path.

[0006] An open showcase according to another aspect of the present disclosure comprises a canopy disposed above a display room and extending forward, and a heat source, the canopy having a protruding portion protruding downward, an intake vent provided on the rear surface of the protruding portion and positioned below the heat source, and an exhaust vent connected to the intake vent via a ventilation path inside the canopy and positioned above the heat source, and the heat source is disposed in the ventilation path. Effect of the Invention

[0007] The open showcase of the present disclosure can allow air to flow to a heat source such as a lighting power source through an intake vent formed in a position that is difficult to see from the front side. This allows heat to be dissipated from a heat source such as a lighting power source provided inside the canopy without compromising the exterior design. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of an open showcase according to a first embodiment; [Diagram 2] Cross-sectional view of an open showcase [Diagram 3] Canopy perspective view [Figure 4] Cross-section of the canopy [Diagram 5] Cross-sectional view of the canopy including the lighting power source [Figure 6] A perspective view of the lighting power source in the canopy [Figure 7] Exploded view of the canopy from the front [Figure 8] Exploded perspective view of the lighting power supply [Figure 9] Schematic diagram of a horizontally cut lighting power supply [Figure 10] Cross-sectional view of a canopy according to a second embodiment [Figure 11] FIG. 13 is a schematic diagram showing a horizontally cut lighting power supply according to a second embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] At the time when the inventors came up with the present disclosure, the technology of the open showcase required a thinner top plate including the canopy due to the requirement of the exterior design. Therefore, the space for arranging the lighting power source in the canopy tended to be narrow. Also, in order to extend the life of the lighting power source, it was necessary to dissipate the heat generated by the lighting power source itself or from the outside. Under such circumstances, the inventors discovered a problem that providing a hole for dissipating heat from a heat source such as a lighting power source easily affects the exterior design of the open showcase, and in order to solve this problem, the subject of the present disclosure was formed. Therefore, the present disclosure provides an open showcase that can dissipate heat from a heat source such as a lighting power source provided inside the canopy without compromising the exterior design.

[0010] Hereinafter, the embodiments will be described in detail with reference to the drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanation of already well-known matters or duplicate explanation of substantially the same configuration may be omitted. This is to avoid the following explanation becoming more redundant than necessary and to facilitate understanding by those skilled in the art. It should be noted that the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0011] (Embodiment 1) Hereinafter, the first embodiment will be described with reference to FIGS.

[0012] [1-1. Configuration] [1-1-1. Overall composition of the open showcase] 1 is a perspective view of an open showcase 1 according to the embodiment 1. The open showcase 1 is placed on the floor of a store such as a supermarket or a convenience store, and displays items such as beverages and foods in a refrigerated state. The open showcase 1 is a so-called open-type showcase.

[0013] The open showcase 1 has a generally box-shaped case 11 with an open front for inserting and removing items. Hereinafter, the opening direction of the case 11 in the horizontal direction will be referred to as the front, and the direction perpendicular to the front-rear direction in the horizontal direction will be referred to as the width direction or the left-right direction. The open showcase 1 has a base 18 that supports the case 11. Inside the case 11, a display room 12 that is a space in which items are displayed is provided.

[0014] FIG. 2 is a cross-sectional view of the open showcase 1, showing a cross section perpendicular to the width direction. As shown in FIG. 2, the case 11 has a bottom wall 13 that covers the display chamber 12 from below. The case 11 has a pair of side walls 14 that are erected on the left and right side edges of the bottom wall 13 and cover the display chamber 12 from the left and right directions. The case 11 has a rear wall 15 that spans between the pair of left and right side walls 14 and covers the display chamber 12 from the rear. The case 11 has an upper wall 16 that spans between each side wall 14 and the rear wall 15 and covers the display chamber 12 from above. The bottom wall 13 is formed with a lower front wall 17 that is formed by bending the front part of the bottom wall 13 upward and extending it. The bottom wall 13, each side wall 14, the lower front wall 17, the rear wall 15, and the upper wall 16 are all heat-insulating walls.

[0015] A pedestal portion 18 is provided on the lower surface of the bottom wall 13. The pedestal portion 18 is placed on the floor, which is the placement surface of the open showcase 1. The pedestal portion 18 supports the case 11 with its upper surface.

[0016] An inner wall 20 is provided inside the case 11, spaced apart from the inner surface of the case 11 and covering the case 11 from the inside. The inner wall 20 has a partition wall 22 extending in the up-down direction in front of the rear wall 15. The inner wall 20 has an inner upper wall 24 extending forward from the upper end of the partition wall 22 along the upper wall 16. The inner wall 20 has a deck pan 26 extending forward approximately horizontally from the lower end of the partition wall 22 and connected to an upper portion of the lower front wall 17.

[0017] The display room 12 is formed by being partitioned by an inner wall 20 and each side wall 14. For example, the partition wall 22 functions as a back panel that constitutes the back of the display room 12. Inside the display room 12, a plurality of display shelves 28 on whose upper surfaces items are placed and displayed are provided. The display shelves 28 are lined up in the vertical direction, attached to the partition wall 22 at intervals from each other, and extend substantially horizontally forward.

[0018] In this embodiment, the deck pan 26 is also configured to be able to display items, and the deck pan 26 functions as the lowest display shelf. The front end of the deck pan 26 is located forward of the front ends of the display shelves 28. Also, in this embodiment, four display shelves 28 are arranged vertically, but the number of display shelves 28 may be any number equal to or greater than one. Also, a configuration in which no display shelves 28 are provided may be used.

[0019] A duct 30 is formed between the inner wall 20 and the case 11. The duct 30 is a space surrounded by the inner wall 20, the bottom wall 13, each side wall 14, the lower front wall 17, the rear wall 15, and the upper wall 16.

[0020] The duct 30 has a lower duct 32 formed between the deck pan 26 and the bottom wall 13 and extending in the front-to-rear direction. The duct 30 has a rear duct 34 formed between the partition wall 22 and the rear wall 15 and extending in the up-down direction. The duct 30 has an upper duct 36 formed between the inner upper wall 24 and the upper wall 16 and extending in the front-to-rear direction. The display chamber 12 is surrounded by the lower duct 32, the rear duct 34, and the upper duct 36.

[0021] An air outlet 37 that opens downward and communicates with the display chamber 12 is provided at the front end of the upper duct 36. The air outlet 37 is located below the front end of the upper wall 16, at a location located at the upper part of the front side of the display chamber 12.

[0022] An intake port 38, which is an opening that opens upward and communicates with the display chamber 12, is provided at the upper part of the front end of the lower duct 32. The intake port 38 is provided at the lower front part of the display chamber 12, continuing from the rear part of the lower front wall 17. The intake port 38 is located forward of the air outlet 37. The air outlet 37 and the intake port 38 extend in an elongated manner between the side walls 14 across substantially the entire width of the case 11.

[0023] The open showcase 1 has a cooling system (not shown) that cools the display room 12. This cooling system is a refrigeration cycle that includes a compressor that compresses a refrigerant, an evaporator 31, a condenser, and an expansion mechanism that are connected in a circular manner by piping, and the refrigerant is sealed in the cooling system.

[0024] In this embodiment, the evaporator 31 is provided inside the duct 30 of the case 11, and the above-mentioned compressor, condenser, and expansion mechanism are provided integrally with the open showcase 1, for example, by being housed inside the base portion 18. Note that the above-mentioned compressor, condenser, and expansion mechanism may be housed in an outdoor unit that is separate from the open showcase 1.

[0025] A blower 33 is provided inside the duct 30. The blower 33 has a motor 33a and an impeller 33b attached to the output shaft of the motor 33a. The blower 33 circulates the air (cold air) cooled by the evaporator 31 by rotating the impeller 33b with the motor 33a.

[0026] A canopy 40 is attached to the front end 16a of the upper wall 16 of the case 11. The canopy 40 is provided across substantially the entire width of the open showcase 1. The canopy 40 is located above the display chamber 12 and has a shape that protrudes forward.

[0027] The canopy 40 is provided with an exterior lighting 39a and a lighting power supply 90. The exterior lighting 39a illuminates the display room 12 with power supplied from the lighting power supply 90. The exterior lighting 39a is located below the canopy 40. The exterior lighting 39a corresponds to the "lighting device" in this embodiment. The lighting power supply 90 corresponds to an example of the "heat source" in this disclosure.

[0028] The lighting power supply 90 supplies power to the exterior lighting 39a and the interior lighting 39b provided inside the display room 12. The lighting power supply 90 is provided inside the canopy 40.

[0029] [1-1-2. Canopy configuration] Fig. 3 is a perspective view of the canopy 40. Fig. 4 is a cross-sectional view of the canopy 40, showing a cross section perpendicular to the width direction. The cross section in Fig. 4 is a cross section at an end portion of the canopy 40 in the width direction. Note that Fig. 3 shows a part of the upper surface 41 of the canopy 40 in a see-through state. As shown in Fig. 3, in this embodiment, two lighting power sources 90 are provided in the canopy 40.

[0030] The canopy 40 is a hollow structure. An upper surface 41 of the canopy 40 is formed in a horizontal plane. A protruding portion 43 that protrudes downward is formed at the front end of the canopy 40. The protruding portion 43 is provided over substantially the entire canopy 40 in the width direction. As shown in FIG. 4, an exterior lighting 39a is attached to a rear surface 45 of the protruding portion 43 that faces rearward.

[0031] The canopy 40 includes a front cover 51, a rear cover 61, and a bottom cover 71, each of which covers substantially the entire open showcase 1 in the width direction. Each of the covers 51, 61, and 71 is made of sheet metal. The canopy 40 is also provided with a fixing member 81 that fixes each of the covers 51, 61, and 71 to the case 11. The front cover 51 corresponds to a "first member" in this embodiment. The rear cover 61 corresponds to a "second member" in this embodiment.

[0032] As shown in Fig. 3, the fixing members 81 are members formed from sheet metal, and a pair are provided at both ends of the canopy 40 in the width direction. The fixing members 81 are fixed to the upper wall 16 of the case 11 by fastening. The fixing member 81 has a main body portion 83 that is parallel to the vertical direction and extends in the front-rear direction. The fixing member 81 is formed with a front cover support portion 85 and a rear cover support portion 87. The front cover support portion 85 and the rear cover support portion 87 are horizontal portions bent from the upper end of the main body portion 83 toward the inside in the width direction.

[0033] The front cover 51 is formed with a first upper surface portion 53 which is a horizontal flat portion, and a front surface portion 55 which is bent downward from the front end of the first upper surface portion 53. The first upper surface portion 53 is placed on the front cover support portion 85 from above, and is supported by the front cover support portion 85.

[0034] A first connection portion 54 is formed at the rear end of the first upper surface portion 53. The first connection portion 54 is formed with a first contact surface 54a bent downward from the rear end of the first upper surface portion 53, and a first inclined surface 54b bent upward toward the rear from the lower end of the first contact surface 54a.

[0035] A first fixing portion 56 is formed at the lower end of the front surface 55. The first fixing portion 56 is formed by bending the lower end of the front surface 55 rearward and upward multiple times. A first fixing surface 56a that is inclined upward toward the rear is formed at the tip of the first fixing portion 56.

[0036] The rear cover 61 is provided behind the front cover 51. The rear cover 61 has a second upper surface portion 63 which is a horizontal flat portion. The second upper surface portion 63 is placed over the rear cover support portion 87 and fastened to the rear cover support portion 87.

[0037] As shown in FIG. 4, the second connection portion 64 is formed on the rear cover 61. The second connection portion 64 is formed with a second contact surface 64a bent downward from the front end of the second upper surface portion 63, and a second inclined surface 64b bent upward from the lower end of the second contact surface 64a. The second contact surface 64a is formed parallel to the first contact surface 54a of the first connection portion 54. The second inclined surface 64b is formed parallel to the first inclined surface 54b of the first connection portion 54. The second contact surface 64a contacts the first contact surface 54a from the rear, and the second inclined surface 64b contacts the first inclined surface 54b from above, so that the second connection portion 64 and the first connection portion 54 are hooked to each other. As a result, the front cover 51 and the rear cover 61 are positioned, the first upper surface portion 53 and the second upper surface portion 63 are flush with each other, and the upper surface 41 of the canopy 40 is formed.

[0038] In other words, the first upper surface portion 53 constitutes the front part of the upper surface 41, and the second upper surface portion 63 constitutes the rear part of the upper surface 41. By forming the front and rear parts of the upper surface 41 of the canopy 40 with different members as in this embodiment, it is possible to access the inside of the canopy 40 by removing only the front cover 51. This improves the maintainability of the open showcase 1.

[0039] Further, the second inclined surface 64b has a second fixing surface 64c bent downward at an end in the width direction. The second fixing surface 64c is fastened to a rear fastening portion 89. The rear fastening portion 89 is formed by bending the main body portion 83 of the fixing member 81 inward in the width direction.

[0040] The lower cover 71 is a member provided below the front cover 51 and the rear cover 61. A third fixing surface 72 parallel to the first fixing surface 56a of the front cover 51 is formed at the front end of the lower cover 71. The third fixing surface 72 is fixed to the first fixing surface 56a by fastening with screws or the like in a state where it is overlapped with the first fixing surface 56a.

[0041] The lower cover 71 is formed with a rear surface portion 73 extending upward from the third fixing surface 72. The rear surface portion 73 is located in a position covered by the front surface portion 55 when viewed from the front. By fastening the third fixing surface 72 and the first fixing surface 56a, the front surface portion 55 and the rear surface portion 73 are positioned, and the protruding portion 43 of the canopy 40 is formed. In other words, the front surface portion 55 constitutes the front surface of the protruding portion 43, and the rear surface portion 73 constitutes the rear surface 45 of the protruding portion 43. The rear surface 45 is the outer surface of the protruding portion 43 facing rearward.

[0042] The rear surface portion 73 has a lower rear surface portion 73a that is inclined upward toward the rear from the third fixing surface 72, and an upper rear surface portion 73b that is bent from the upper end of the lower rear surface portion 73a and inclined upward toward the front. A resin fixing tool (not shown) is attached to the upper rear surface portion 73b, and the exterior lighting 39a is attached by fitting it into the fixing tool.

[0043] The lower cover 71 has a horizontal, planar first bottom surface portion 74 bent backward from the upper end of the upper rear surface portion 73b. A lighting power supply 90 is fixed on the first bottom surface portion 74. The first bottom surface portion 74 is located forward of the first connection portion 54 and the second connection portion 64. Therefore, the lighting power supply 90 is located forward of the first connection portion 54 and the second connection portion 64, and is located below the first upper surface portion 53.

[0044] In the lower cover 71, a horizontal, planar second bottom surface portion 75 is formed behind the first bottom surface portion 74. The second bottom surface portion 75 extends rearward beyond the first connecting portion 54 and the second connecting portion 64.

[0045] [1-1-3. Configuration of ventilation route] Fig. 5 is a cross-sectional view of the canopy 40 in a cross section perpendicular to the width direction, and shows a cross section including the lighting power source 90. In Fig. 5, the air flow inside the canopy 40 is indicated by two-dot chain line arrows. The air flow will be described in detail later.

[0046] 5, in the canopy 40, the lower rear surface portion 73a of the lower cover 71 is formed with an intake ventilation hole 73a1. The intake ventilation hole 73a1 is a hole penetrating the lower rear surface portion 73a, and communicates the inside and outside of the canopy 40. A plurality of intake ventilation holes 73a1 are formed and arranged in the width direction. The intake ventilation hole 73a1 is located below the lighting power source 90.

[0047] Further, exhaust ventilation holes 63a are formed in the second upper surface portion 63 of the rear cover 61. The exhaust ventilation holes 63a are holes that penetrate the second upper surface portion 63 vertically, and communicate the inside and outside of the canopy 40. A plurality of exhaust ventilation holes 63a are arranged in the width direction and the front-rear direction. The exhaust ventilation holes 63a are located above the lighting power source 90. Furthermore, the exhaust ventilation holes 63a are located rearward of the lighting power source 90. For this reason, the exhaust ventilation holes 63a are difficult to see from the front side. Furthermore, even if dust or dirt enters the inside of the canopy 40 from the exhaust ventilation holes 63a, it is difficult for the dust or dirt to reach the lighting power source 90.

[0048] In this way, the inside and outside of the canopy 40 communicate with each other through the intake vent 73a1 and the exhaust vent 63a, so that outside air can pass through the inside of the canopy 40 via the intake vent 73a1 and the exhaust vent 63a. Hereinafter, the space within the canopy 40 through which outside air can pass from the intake vent 73a1 to the exhaust vent 63a is referred to as the ventilation path S1.

[0049] In detail, the ventilation path S1 includes the intake ventilation hole 73a1, the space in the protruding portion 43, the space between the first bottom surface portion 74 and the first upper surface portion 53, and the space between the second bottom surface portion 75 and the second upper surface portion 63 up to the exhaust ventilation hole 63a. That is, the lighting power supply 90 fixed to the first bottom surface portion 74 is provided inside the ventilation path S1.

[0050] 6 is a perspective view of the vicinity of the lighting power source 90 in the canopy 40 with the front cover 51 removed. The first connecting portion 54 and the second connecting portion 64 bent downward from the first upper surface portion 53 and the second upper surface portion 63 are located inside the ventilation path S1.

[0051] As shown in FIG. 5 and FIG. 6, in this embodiment, the first contact surface 54a of the front cover 51 is formed with a first ventilation hole 54a1. The first ventilation hole 54a1 is a hole penetrating the first contact surface 54a from front to back, and a plurality of the first ventilation holes 54a1 are formed in a line in the width direction. The second contact surface 64a of the rear cover 61 is formed with a second ventilation hole 64a1. The second ventilation hole 64a1 is a hole penetrating the second contact surface 64a from front to back, and a plurality of the second ventilation holes 64a1 are formed in a line in the width direction. The first ventilation hole 54a1 and the second ventilation hole 64a1 are formed in positions where they overlap from front to back. Therefore, the space in front of the first contact surface 54a and the space in the rear of the second contact surface 64a communicate with each other via the first ventilation hole 54a1 and the second ventilation hole 64a1.

[0052] FIG. 7 is an exploded view of the canopy 40 as seen from the front. Note that the front portion 55 is shown in a see-through state in FIG. 7. As shown in FIG. 7, the intake vents 73a1 are formed in a range R1 that covers the entire canopy 40 in the width direction, i.e., the entire open showcase 1 in the width direction. The range R1 includes a position P1 that the lighting power sources 90 occupy in the width direction. In this embodiment, two lighting power sources 90 are provided in the canopy 40, and the range R1 includes the positions P1 that all the lighting power sources 90 occupy in the width direction.

[0053] 7, the first ventilation hole 54a1 and the second ventilation hole 64a1 are formed in a range R2 that spans a portion of the canopy 40 in the width direction and includes a position P1 that the lighting power source 90 occupies in the width direction. In this embodiment, since two lighting power sources 90 are provided in the canopy 40, the first ventilation hole 54a1 and the second ventilation hole 64a1 are formed in two ranges R2. The sum of the widths of the two ranges R2 is smaller than the width of the range R1. In other words, the range R2 in which the first ventilation hole 54a1 and the second ventilation hole 64a1 open in the width direction is narrower than the range R1 in which the intake ventilation hole 73a1 opens in the width direction.

[0054] 3 and 6, the exhaust ventilation hole 63a occupies approximately the same position in the width direction as the first ventilation hole 54a1 and the second ventilation hole 64a1. In other words, the exhaust ventilation hole 63a is provided in a range including the position P1 across a part of the canopy 40 in the width direction. Also, the range in the width direction in which the exhaust ventilation hole 63a opens is narrower than the range R1 in which the intake ventilation hole 73a1 opens in the width direction.

[0055] [1-1-4. Lighting power supply configuration] 8 is an exploded perspective view of the lighting power supply 90. The lighting power supply 90 includes a power supply board 91 and a cover member 93.

[0056] The power supply board 91 is a printed circuit board that rectifies the power supplied to the exterior lighting 39a, and the component surface 91a faces upward. A plurality of heat dissipation sections 92 that protrude upward from the component surface 91a are attached to the component surface 91a. The heat dissipation sections 92 are so-called heat dissipation fins, and have a bank section 92a and fins 92b. The heat dissipation sections 92 are provided so as to come into contact with elements that tend to generate heat, such as transistors or three-terminal regulators, that are attached to the component surface 91a of the power supply board 91. The component surface 91a faces upward.

[0057] The bank portion 92a is a flat portion extending in the vertical direction. The fins 92b are flat portions extending in the vertical direction and perpendicular to the bank portion 92a. In the heat dissipation portion 92, four fins 92b extend in the same direction from one bank portion 92a.

[0058] The cover member 93 is a member that is placed over the power supply board 91 from above to protect the power supply board 91. The cover member 93 is made of sheet metal. The cover member 93 has a front cover portion 94, a top cover portion 95, and a rear cover portion 96.

[0059] The cover front portion 94 is a planar portion extending in the left-right direction along the vertical direction. The cover front portion 94 covers the power supply board 91 from the front. A plurality of front ventilation holes 94a are formed over substantially the entire surface of the cover front portion 94. The front ventilation holes 94a are holes that penetrate the cover front portion 94 from front to rear.

[0060] The cover top surface portion 95 is a horizontal, planar portion bent backward from the upper end of the cover front surface portion 94. The cover top surface portion 95 covers the power supply board 91 from above. A plurality of top surface ventilation holes 95a are formed over substantially the entire surface of the cover top surface portion 95. The top surface ventilation holes 95a are holes that vertically penetrate the cover top surface portion 95.

[0061] The cover rear portion 96 is a flat portion bent downward from the rear end of the cover upper portion 95 and extending in the vertical and width directions. The cover rear portion 96 covers the power supply board 91 from the rear. A plurality of rear ventilation holes 96a are formed on substantially the entire surface of the cover rear portion 96. The rear ventilation holes 96a are holes that penetrate the cover rear portion 96 from front to rear. In this embodiment, the rear ventilation holes 96a are formed at positions that overlap front to rear with the front ventilation holes 94a.

[0062] In addition, in this embodiment, when viewed from the front, there is a portion between the front ventilation holes 94a and the rear ventilation holes 96a that is not blocked by components such as the heat dissipation unit 92 attached to the power supply board 91. For this reason, air can easily flow back and forth between the front ventilation holes 94a and the rear ventilation holes 96a through the portion that is not blocked by components such as the heat dissipation unit 92.

[0063] The cover member 93 has a board fixing portion 97 formed by bending rearward from a cover front portion 94 or forward from a cover rear portion 96. The board fixing portion 97 is fastened to the power supply board 91 with screws or the like.

[0064] A pair of mounting portions 98 are formed on the cover member 93. The mounting portions 98 are suspended across both ends in the width direction of the cover front surface portion 94 and the cover rear surface portion 96. The mounting portions 98 come into contact with the first bottom surface portion 74 of the lower cover 71 from above, and are fastened to the lower cover 71.

[0065] Fig. 9 is a schematic diagram showing a lighting power supply 90 cut horizontally. Fig. 9 shows heat dissipation sections 92 that are particularly likely to block air flow on a power supply board 91. As shown in Fig. 9, at least one end in the width direction of each heat dissipation section 92 is located adjacent to any one of ranges R3, R4, R5, R6, and R7 not occupied by each heat dissipation section 92 in the width direction.

[0066] The heat dissipation section 92, which is particularly likely to block the air flow in the front-rear direction, is not located in the space within each of the ranges R3, R4, R5, R6, and R7. Therefore, air easily flows in the front-rear direction through the space within the ranges R3, R4, R5, R6, and R7. Hereinafter, the spaces located within the ranges R3, R4, R5, R6, and R7 in the lighting power supply 90 are referred to as the power supply internal ventilation paths S2, S3, S4, S5, and S6. The power supply internal ventilation paths S2, S3, S4, S5, and S6 extend in the front-rear direction.

[0067] 9, in this embodiment, at least one front ventilation hole 94a and one rear ventilation hole 96a are located inside each of the ranges R3 to R6. Furthermore, the range R7 is located outside in the width direction of the cover front part 94 and the cover rear part 96. For this reason, air outside the cover member 93 tends to flow in the front-rear direction in the power supply internal ventilation paths S2 to S6.

[0068] [1-2. Operation] In the open showcase 1 configured as above, the air flow passing through the canopy 40 will be described below.

[0069] When the exterior lighting 39a is turned on, external power is supplied to the lighting power source 90, and power is supplied to the exterior lighting 39a. As a result, the lighting power source 90 generates heat, and the air around the lighting power source 90 in the canopy 40 is warmed. As shown in FIG. 5, the warmed air (hereinafter referred to as warm air) has a lower specific gravity than the surrounding air and flows upward. As a result, the warm air accumulates under the first upper surface portion 53 located above the lighting power source 90.

[0070] When warm air continues to accumulate under the first upper surface portion 53, the warm air flows rearward along the first upper surface portion 53 and the second upper surface portion 63, and flows from the exhaust ventilation holes 63a to the outside of the canopy 40. At this time, in this embodiment, the contact surfaces 54a, 64a that protrude downward at the boundary between the first upper surface portion 53 and the second upper surface portion 63 are provided with ventilation holes 54a1, 64a1 that overlap each other from the front to the rear. Therefore, the warm air that has flowed along the first upper surface portion 53 is more likely to flow smoothly along the second upper surface portion 63 through the ventilation holes 54a1, 64a1.

[0071] Furthermore, as warm air flows out of the canopy 40 from the exhaust ventilation hole 63a, outside air flows into the canopy 40 from the intake ventilation hole 73a1. The outside air that flows in from the intake ventilation hole 73a1 flows upward inside the protruding portion 43 and reaches the lighting power source 90. In this way, natural convection caused by heat generation from the lighting power source 90 generates air flows through the intake ventilation hole 73a1, the ventilation path S1, and the exhaust ventilation hole 63a in this order. This promotes heat dissipation from the lighting power source 90 provided in the ventilation path S1.

[0072] 7, in this embodiment, the intake ventilation hole 73a1 is provided in a range R1 that covers substantially the entire width of the canopy 40. Meanwhile, the ventilation holes 54a1, 64a1 and the exhaust ventilation hole 63a are provided only in a range R2 that includes a position P1 occupied by the lighting power source 90 and is narrower than the range R1 in the width direction. Therefore, the air that flows in from the intake ventilation hole 73a1 that covers substantially the entire width of the canopy 40 can flow in a concentrated manner toward the lighting power source 90.

[0073] Air flowing into the lighting power supply 90 flows into the inside of the cover member 93 through the front ventilation holes 94a and flows out of the cover member 93 through the rear ventilation holes 96a (see Figs. 8 to 9). In this embodiment, the area between the front ventilation holes 94a and the rear ventilation holes 96a is not completely blocked by the components of the power supply board 91, so air can easily flow rearward through the unblocked area. Also, in this embodiment, the front ventilation holes 94a and the rear ventilation holes 96a are positioned to overlap each other in the front-to-rear direction, so air can easily flow smoothly from the front ventilation holes 94a to the rear ventilation holes 96a.

[0074] 9, at least one end in the width direction of each heat dissipation section 92 is adjacent to any one of the power supply internal ventilation channels S2 to S6. Therefore, heat dissipation from the heat dissipation section 92 is promoted by the air flowing through the power supply internal ventilation channels S2 to S6.

[0075] [1-3. Effects, etc.] As described above, in this embodiment, the open showcase 1 is provided above the display room 12 and comprises a canopy 40 extending forward, an exterior light 39a provided below the canopy 40 for illuminating the display room 12, and a lighting power supply 90 for supplying power to the exterior light 39a, and the canopy 40 is provided with a protrusion 43 that protrudes downward, an intake vent 73a1 provided on a rear surface 45 of the protrusion 43 and positioned below the lighting power supply 90, and an exhaust vent 63a that communicates with the intake vent 73a1 via a ventilation path S1 inside the canopy 40 and is positioned above the lighting power supply 90, and the lighting power supply 90 is provided in the ventilation path S1.

[0076] As a result, air that has flowed into the canopy 40 from the intake ventilation hole 73a1 flows out of the exhaust ventilation hole 63a via the ventilation path S1 in which the lighting power source 90 is provided. In addition, since the intake ventilation hole 73a1 is provided on the rear surface 45 of the protruding portion 43, the intake ventilation hole 73a1 is difficult to see from the front. This makes it possible to promote heat dissipation from the lighting power source 90 without impairing the external design of the open showcase 1. In addition, since the lighting power source 90 and the exterior lighting 39a can be arranged close to each other, voltage drops can be suppressed.

[0077] Furthermore, in the open showcase 1, as in this embodiment, the exhaust ventilation hole 63a may be provided on the upper surface 41 of the canopy 40 on the rear side of the lighting power source 90.

[0078] This makes it difficult to see the exhaust ventilation hole 63a from the front side, while preventing dust and dirt that has entered the inside of the canopy 40 from the exhaust ventilation hole 63a from reaching the lighting power source 90. This makes it possible to dissipate heat from the lighting power source 90 while preventing breakdowns in the lighting power source 90 without impairing the external design of the open showcase 1.

[0079] Also, as in this embodiment, in the open showcase 1, the canopy 40 has a front cover 51 and a rear cover 61, the front cover 51 is provided with a first upper surface portion 53 constituting the front part of the upper surface 41, a first contact surface 54a bent downward from the first upper surface portion 53, and a first ventilation hole 54a1 formed in the first contact surface 54a, the rear cover 61 is provided with a second upper surface portion 63 constituting the rear part of the upper surface 41, a second contact surface 64a bent downward from the second upper surface portion 63 and overlapped from the rear on the first contact surface 54a, and a second ventilation hole 64a1 formed in the second contact surface 64a, the lighting power source 90 is disposed below the first upper surface portion 53, the exhaust ventilation hole 63a is formed in the second upper surface portion 63, and the first ventilation hole 54a1 and the second ventilation hole 64a1 overlap each other.

[0080] As a result, the upper surface 41 can be constructed of two members, and the inside of the canopy 40 can be accessed by removing one of the members. In addition, the first contact surface 54a and the second contact surface 64a are less likely to impede the air flow. This improves the maintainability of the open showcase 1 while promoting heat dissipation from the lighting power source 90.

[0081] Furthermore, as in this embodiment, in the open showcase 1, the lighting power supply 90 includes a power supply board 91, and the power supply board 91 is provided with a plurality of heat dissipation sections 92 protruding upward from the component surface 91a, and at least one side in the width direction of each heat dissipation section 92 is adjacent to internal power supply ventilation passages S2 to S6 extending in the front-to-rear direction.

[0082] This allows the air flowing rearward through the power supply 90 to flow rearward through the internal power supply ventilation paths S2 to S6. This makes it easier for heat to be dissipated from the heat dissipation section 92, and thus promotes heat dissipation from the power supply 90.

[0083] Furthermore, as in this embodiment, in the open showcase 1, the lighting power supply 90 is provided with a cover member 93 that covers the power supply board 91, and the cover member 93 is provided with a front cover portion 94 that covers the power supply board 91 from the front side, a rear cover portion 96 that covers the power supply board 91 from the rear side, a plurality of front ventilation holes 94a formed in the front cover portion 94, and a plurality of rear ventilation holes 96a formed in the rear cover portion 96, and the plurality of front ventilation holes 94a may be configured to overlap front-to-rear with the plurality of rear ventilation holes 96a.

[0084] This allows the air flowing rearward of the lighting power supply 90 to easily pass through the rear ventilation holes 96a after passing through the front ventilation holes 94a. This can promote heat dissipation from the lighting power supply 90.

[0085] Furthermore, as in this embodiment, in the open showcase 1, the intake ventilation hole 73a1 may be provided across almost the entire canopy 40 in the width direction, and the exhaust ventilation hole 63a may be provided in a range R2 in the width direction that overlaps with the position P1 occupied by the lighting power source 90 and is narrower than the intake ventilation hole 73a1.

[0086] This allows the air that flows in from substantially the entire canopy 40 in the width direction to flow intensively toward the lighting power source 90. This can promote heat dissipation from the lighting power source 90.

[0087] (Embodiment 2) Hereinafter, the embodiment will be described with reference to FIG. 10 and FIG.

[0088] 10 is a cross-sectional view of canopy 140 according to embodiment 2, showing a cross section perpendicular to the width direction including lighting power source 190. In canopy 140 of embodiment 2, suction vent 173b1 is provided in upper rear surface portion 73b to which exterior lighting 39a is attached. In this embodiment, suction vent 173b1 is located above exterior lighting 39a. Suction vent 173b1 has the same configuration as suction vent 73a1, except that suction vent 173b1 is provided in upper rear surface portion 73b.

[0089] 11 is a schematic diagram of a lighting power supply 190 according to the second embodiment, cut horizontally. The lighting power supply 190 of the second embodiment includes a plurality of heat dissipation sections 192 having a different configuration from the heat dissipation section 92 of the first embodiment. Each heat dissipation section 192 is attached to a component surface 191a of a power supply board 191. The heat dissipation section 192 protrudes upward from the component surface 191a. Unlike the heat dissipation section 92 of the first embodiment, the heat dissipation section 192 of the second embodiment is provided such that all fins 192b are oriented parallel to the front-rear direction.

[0090] Moreover, ventilation holes 192c that are holes penetrating the bank portion 192a from front to rear are formed in the bank portion 192a of the heat dissipation portion 192. The ventilation holes 192c are provided between the connection portions of the bank portion 192a and each of the fins 192b.

[0091] [2-2. Operation] The air flow within the canopy 140 thus formed will be described below.

[0092] In this embodiment, the intake vent 173b1 is located above the exterior lighting 39a. Therefore, outside air warmed by heat generated by the exterior lighting 39a flows into the canopy 140 through the intake vent 173b1 located above. At this time, due to the chimney effect, the surrounding unheated outside air tends to flow into the canopy 140 through the intake vent 173b1.

[0093] In this embodiment, the fins 192b of the heat dissipation section 192 are parallel to the front-rear direction, and are unlikely to impede the forward airflow in the lighting power supply 90. Furthermore, since the bank section 192a has the ventilation holes 192c, the air that flows between the fins 192b can flow backward through the ventilation holes 192c. Therefore, the air flowing in the lighting power supply 190 is more likely to flow forward, and heat dissipation of the lighting power supply 190 is more likely to be promoted.

[0094] [2-3. Effects, etc.] As described above, in the present embodiment, the exterior lighting 39a may be attached to the rear surface 45 of the protruding portion 43, and the intake vent 173b1 may be located above the exterior lighting 39a.

[0095] As a result, the heat of the exterior lighting 39a makes it easier for outside air to flow into the canopy 140 through the intake vent 173b1. This makes it easier to promote heat dissipation from the lighting power supply 190.

[0096] (Other embodiments) As described above, the first and second embodiments have been described as examples of the technology disclosed in this application. However, the technology in this disclosure is not limited to these, and can be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are made. In addition, it is also possible to combine the components described in the first and second embodiments to create new embodiments. Therefore, other embodiments will be exemplified below.

[0097] In the above embodiment, the lighting power supplies 90, 190 are described as including the cover member 93 that covers the power supply board 91, 191, but this is just one example. The lighting power supplies 90, 190 may be configured without including the cover member 93.

[0098] In the above embodiment, it has been described that the canopy 40, 140 is provided with two lighting power sources 90, 190, but this is just one example. It is sufficient that the canopy 40, 140 is provided with one or more lighting power sources 90, 190. In addition, the canopy 40, 140 may be provided with not only the lighting power sources 90, 190, but also heat sources such as power sources for driving each part of the showcase such as a blower fan, and electric / electronic circuits and parts that generate a lot of heat, or may be provided with a plurality of different types of heat sources. Furthermore, the number of ranges R2 in which the first ventilation holes 54a1, the second ventilation holes 64a1, and the exhaust ventilation holes 63a are provided is not limited to two, and may be the same number as the number of the lighting power sources 90, 190. In addition, it has been described that the intake ventilation holes 73a1, 173b1 are provided in a range R1 that covers substantially the entire canopy 40 in the width direction, but this is just one example. The range R1 in which the intake vents 73a1 and 173b1 are provided may be larger than the range R2 in which the first vents 54a1, the second vents 64a1, and the exhaust vents 63a are provided.

[0099] In the above embodiment, the upper surface 41 of the canopy 40, 140 is described as being composed of the first upper surface portion 53 of the front cover 51 and the second upper surface portion 63 of the rear cover 61, but this is just one example. The upper surface 41 of the canopy 40, 140 may be composed of a single member. In this case, the structure of the canopy 40, 140 can be simplified.

[0100] It should be noted that the above-described embodiments are intended to illustrate the technology of the present disclosure, and various modifications, substitutions, additions, omissions, and the like can be made within the scope of the claims or their equivalents.

[0101] [Configuration supported by the above embodiment] The above embodiment supports the following configurations.

[0102] (Additional Note) (Technology 1) An open showcase comprising a canopy provided above a display room and extending forward, a lighting device provided below the canopy for illuminating the display room, and a lighting power source for supplying power to the lighting device, wherein the canopy is provided with a protrusion that protrudes downward, an intake vent provided on a rear surface of the protrusion and positioned below the lighting power source, and an exhaust vent connected to the intake vent via a ventilation path inside the canopy and positioned above the lighting power source, and the lighting power source is provided in the ventilation path. This makes it easier for air to flow through the ventilation path. Also, since the intake vents are provided on the rear surface of the protruding portion, the intake vents are less visible from the front. This makes it easier to promote heat dissipation from the lighting power source without compromising the exterior design of the open showcase. Also, since the lighting power source and the lighting device can be arranged close to each other, it is easier to suppress voltage drops.

[0103] (Technical Technique 2) The open showcase according to Technical Technique 1, wherein the lighting device is attached to the rear surface of the protrusion, and the intake vent is located above the lighting device. This makes it easier for outside air to flow into the canopy through the intake vents due to the heat from the lighting device, which makes it easier to promote heat dissipation from the lighting power source.

[0104] (Technical Technique 3) The open showcase according to Technical Technique 1 or 2, wherein the exhaust vent is provided on the upper surface of the canopy, rearward of the lighting power source. This makes it difficult to see the exhaust vent from the front. This allows the heat from the lighting power source to be dissipated without compromising the exterior design of the open showcase. It also prevents dust and dirt that has entered the canopy through the exhaust vent from reaching the lighting power source. This prevents the lighting power source from failing.

[0105] (Technology 4) The canopy has a first member and a second member, the first member having a first upper surface portion constituting a front portion of the upper surface, a first contact surface bent downward from the first upper surface portion, and a first ventilation hole formed in the first contact surface, the second member having a second upper surface portion constituting a rear portion of the upper surface, a second contact surface bent downward from the second upper surface portion and overlapped with the first contact surface from behind, and a second ventilation hole formed in the second contact surface, the lighting power source is positioned below the first upper surface portion, the exhaust ventilation hole is formed in the second upper surface portion, and the first ventilation hole and the second ventilation hole overlap each other. This is an open showcase described in Technology 3. This allows the top surface of the canopy to be constructed from two parts, so the inside of the canopy can be accessed by removing one of the parts. In addition, the first and second contact surfaces make it difficult for airflow to be impeded. This improves the maintainability of the open showcase while also promoting heat dissipation from the lighting power source.

[0106] (Technology 5) The lighting power supply includes a power supply board, the power supply board is provided with a plurality of heat dissipation sections protruding upward from the component surface, and at least one side of each of the heat dissipation sections in the width direction is adjacent to an internal power supply ventilation passage extending in the front-to-rear direction. This open showcase is described in Technology 3 or 4. This allows the air flowing rearward through the power supply 90 to easily flow rearward through the power supply internal ventilation passage, facilitating heat dissipation from the heat dissipation section and promoting heat dissipation from the power supply.

[0107] (Technology 6) The lighting power supply includes a cover member that covers the power supply board, the cover member having a front cover portion that covers the power supply board from the front side, a rear cover portion that covers the power supply board from the rear side, a plurality of front ventilation holes formed in the front cover portion, and a plurality of rear ventilation holes formed in the rear cover portion, the plurality of front ventilation holes overlapping front-to-rear with the plurality of rear ventilation holes. In the open showcase described in Technology 5. This allows air flowing rearward from the lighting power supply to easily pass through the rear ventilation holes after passing through the front ventilation holes, thereby facilitating heat dissipation from the lighting power supply.

[0108] (Technology 7) An open showcase described in any one of Technologies 1 to 6, wherein the intake vent is provided across almost the entire canopy in the width direction, and the exhaust vent overlaps with the position occupied by the lighting power source in the width direction and is provided in a narrower range than the intake vent. This allows the air flowing in from substantially the entire canopy in the width direction to flow intensively toward the lighting power source, thereby facilitating heat dissipation from the lighting power source.

[0109] (Technology 8) An open showcase comprising a canopy disposed above a display room and extending forward, and a heat source, wherein the canopy is provided with a protruding portion that protrudes downward, an intake vent provided on the rear surface of the protruding portion and positioned below the heat source, and an exhaust vent connected to the intake vent via a ventilation path inside the canopy and positioned above the heat source, and the heat source is provided in the ventilation path. This makes it easier for air to flow through the ventilation path. Also, since the intake vents are provided on the rear surface of the protruding portion, the intake vents are less visible from the front. This makes it easier to promote heat dissipation from the heat source without compromising the external design of the open showcase. [Industrial Applicability]

[0110] The present disclosure is applicable to an open showcase, specifically, an open showcase that is installed in a store or the like and that refrigerates or freezes items displayed in a display room. [Explanation of symbols]

[0111] 1 Open showcase 11 Cases 12 Exhibition room 13 Bottom wall 14 Side wall 15 Back wall 16 Upper Wall 16a Front end 17 Lower front wall 18 Pedestal 20 Inner wall 22 Compartment Wall 24 Inner upper wall 26 Deck Pan 28 Display shelf 30 Duct 31 Evaporator 32 Lower Duct 33 Blower 33a Motor 33b Impeller 34 Back duct 36 Upper Duct 37 Air outlet 38 Intake port 39a External lighting (lighting device) 39b Interior lighting 40 Canopy 41 Top side 43 Protrusion 45 Rear 51 Front cover (first member) 53 1st top section 54 First connection part 54a 1st contact surface 54a1 1st ventilation hole 54b 1st slope 55 Front part 56 1st fixed part 56a 1st fixed surface 61 Rear cover (second part) 63 2nd top section 63a Exhaust vent 64 Second connection part 64a Second contact surface 64a1 2nd ventilation hole 64b 2nd slope 64c 2nd fixed surface 71 Lower cover 72 Third fixed surface 73 Rear part 73a Lower rear part 73a1 Suction vent 73b Upper rear section 74 1st bottom part 75 Second bottom part 81 Fixing member 83 Main body 85 Cover support part 87 Cover support part 89 Rear fastening section 90 Lighting power supply (heat source) 91 Power supply board 91a Parts side 92 Heat radiation part 92a Bank 92b Fin 93 Cover material 94 Front cover 94a Front ventilation hole 95 Top of cover 95a Top ventilation hole 96 Rear part of cover 96a Rear ventilation hole 97 Board fixing part 98 Mounting part 140 Canopy 173b1 Suction vent 190 Lighting power supply 191 Power supply board 191a Parts side 192 Heat radiation part 192a Bank 192b Fin 192c Ventilation hole S1 Ventilation route S2~S6 Ventilation path inside the power supply

Claims

1. A canopy is installed above the display room and extends forward. A lighting device provided under the canopy for illuminating the display room; a lighting power supply for supplying power to the lighting device; The canopy includes: A protruding portion protruding downward; an intake vent provided on a rear surface of the protruding portion and positioned below the lighting power source; an exhaust vent hole that is connected to the intake vent hole via a ventilation path inside the canopy and is located above the lighting power source; The lighting power source is provided in the ventilation path. Open showcase.

2. The lighting device is attached to the rear surface of the protrusion, The intake vent is located above the lighting device. The open showcase according to claim 1.

3. The exhaust vent is provided on the upper surface of the canopy rearward of the lighting power source. The open showcase according to claim 1.

4. The canopy has a first member and a second member, The first member is provided with a first upper surface portion constituting a front portion of the upper surface, a first contact surface bent downward from the first upper surface portion, and a first ventilation hole formed in the first contact surface, The second member is provided with a second upper surface portion constituting a rear portion of the upper surface, a second contact surface bent downward from the second upper surface portion and overlapped with the first contact surface from the rear, and a second ventilation hole formed in the second contact surface, the lighting power source is disposed below the first top surface portion; The exhaust vent is formed in the second upper surface portion, The first ventilation hole and the second ventilation hole overlap each other. The open showcase according to claim 3.

5. The lighting power supply includes a power supply board; The power supply board is provided with a plurality of heat dissipation sections protruding upward from a component surface, At least one side of each of the heat dissipation sections in the width direction is adjacent to an internal power supply ventilation passage extending in the front-rear direction. The open showcase according to claim 3.

6. The lighting power supply includes a cover member that covers the power supply board, the cover member is provided with a front cover portion that covers the power supply board from the front side, a rear cover portion that covers the power supply board from the rear side, a plurality of front ventilation holes formed in the front cover portion, and a plurality of rear ventilation holes formed in the rear cover portion; The front ventilation holes overlap the rear ventilation holes in the front-rear direction. The open showcase according to claim 5.

7. The intake vent is provided over substantially the entire canopy in the width direction, The exhaust ventilation hole overlaps with a position occupied by the lighting power source in a width direction and is provided in a narrower range than the intake ventilation hole. The open showcase according to claim 1.

8. A canopy is installed above the display room and extends forward. A heat source, The canopy includes: A protruding portion protruding downward; an intake vent provided on a rear surface of the protruding portion and positioned below the heat source; An exhaust vent is provided, the exhaust vent communicates with the intake vent through a ventilation path inside the canopy and is located above the heat source, The heat source is provided in the ventilation path. Open showcase.

Images