JPH10205969A - Cold air circulating type open showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cold air circulating type open showcase in which the cold air can flow to a deep side of a display shelf, the cold air can be struck against every corners of goods, a uniform temperature distribution can be attained within the open showcase and further management of keeping quality of the goods can be easily carried out. SOLUTION: A cold air circulating type open showcase 1 is constituted such that an inner box 2 and an inner box 3 having an opening surface at one surface of each of them and having the same structure to each other are arranged in two upper and lower stages and its outside part is covered by an outer box 6 having a thermal insulating wall 5. The main body of the cold air circulating type open showcase 1 is arranged over a floor or the like through a base block 7. Upper side display shelves 23, 25 and lower side display shelves 24, 26 formed with cold air passages are fixed in each of the inner boxes 2 and 3 in a vertical direction in a substantial equal spaced-apart relation from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold air circulation type open showcase, and more particularly to a cold air circulation type open showcase in which a display shelf is formed to have a hollow structure to form a ventilation path and a cool air ejection hole is provided on a lower surface of the display shelf. The present invention relates to a cool air circulation type open showcase capable of flowing cool air to the back and efficiently cooling the entire inside of the refrigerator at low cost.

[0002]

2. Description of the Related Art Conventionally, in a cold air circulation type open showcase, since upper and lower display shelves are installed in a refrigerator, low-temperature cold air hardly flows to the inner part of the refrigerator or the lower display shelf. The upper display shelf close to the cool air outlet cools down well, but the lower display shelf does not cool down sufficiently.The cooling efficiency inside the refrigerator is poor, and it is difficult to control the temperature of the display shelf to maintain the quality of the products in the refrigerator. Met. In view of the above, various cool air circulation open showcases that can uniformly cool the inside of the cool air circulation open showcase and increase the cooling efficiency of the inside of the refrigerator have been conventionally proposed. For example, JP-A-55-1654
No. 68, the display shelf is made hollow,
At the front edge of the shelf, divide the inner space into two, forming a cool air suction side shelf duct and a cool air blow off side shelf duct with a cool air intake port and a cool air blowout port opened downward, respectively,
A structure in which the openings at the rear end of the display shelf of the cool air intake side shelf duct and the cool air discharge side shelf duct are respectively connected to the blower suction side and the cooler discharge side of the cool air ventilation duct of the cool air circulation type open showcase body. Thing, or Shokai 56-
As shown in Japanese Patent No. 72169, the display shelf has a hollow structure, a plurality of cool air outlets are formed in the lower surface of the display shelf, a connection port communicating with the lower surface of the display shelf, and a cool air circulation type open showcase main body. A structure in which a connection port communicating with a cold air ventilation duct is connected by a flexible tube is known.
Further, as described in Japanese Utility Model Application Laid-Open No. 2-55075, a hole is provided on a surface on the back side of the inside of the refrigerator so as to communicate the cool air ventilation duct of the cool air circulation type open showcase with the inside of the refrigerator. 2. Description of the Related Art A structure in which cold air is circulated between a blowing outlet and upper and lower display shelves is known.

[0003]

However, in the cold air circulation type open showcase described in Japanese Patent Application Laid-Open No. 55-165468, the structure of the cool air ventilation duct of the main body, the cool air suction side shelf duct of the display shelf and the cool air are used. Since the structure of the outlet-side shelf duct is complicated, it takes time and effort to manufacture and assemble, thereby increasing the manufacturing cost. In addition, since the cool air does not sufficiently hit the products placed in the back of the display shelf, it is necessary to lower the cool air temperature, which lowers the cooling operation efficiency, and further increases the size of the evaporator and the blower, thereby increasing the manufacturing cost. Problem. Further, in the cool air circulation type open showcase described in Japanese Utility Model Application Laid-Open No. 56-72169, the cool air blown out from the cool air blowout holes on the lower surface of the display shelf is blown out toward the front of the open showcase. Cold air does not sufficiently hit the products placed in the back. In addition, since the flexible tube through which cool air passes can be seen in the back of the display shelf, the appearance deteriorates, and the product image is reduced. In addition, in the case of a thin flexible tube, the flow rate of cold air cannot be sufficiently ensured, so that the temperature of the cold air needs to be greatly reduced to sufficiently cool the product, and the cooling operation efficiency is reduced. Furthermore, since the connection port is small, it is necessary to increase the blowing pressure of the cool air, which causes a problem that the evaporator and the blower become large and the manufacturing cost increases.
Further, in the cool air circulation type open showcase described in Japanese Utility Model Laid-Open Publication No. 2-55075, cool air is blown out from the lower surface of the display shelf, so that the cold air is slightly applied to the products placed in the back of the cabinet. However, the blowing direction of the cool air is basically in the forward direction of the open showcase, and therefore, the cooling air circulation efficiency is still low and not sufficient. Also,
The hole communicating the cold air ventilation duct with the inside of the refrigerator is small, so that the flow rate of the cold air curtain is reduced and the temperature of the air curtain is also increased, so that the heat shielding property against the outside air is deteriorated. In addition, the flow rate of cool air in the upper display shelf decreases, and the cooling performance of the upper display shelf decreases. Furthermore, since the structure of the cool air ventilation duct of the main body is complicated, there is a problem that the production and assembly is troublesome and the production cost is increased.

In view of the above, the present invention has been made to solve the above-described problems. The display shelf has a hollow structure, and a cold air inlet and a cold air flow are provided at the front edge and the rear edge of the display shelf, respectively. By providing an outlet and a cool air outlet on the lower surface of the display shelf, cool air can flow to the back of the display shelf and shine cool air to every corner of the product, uniform temperature distribution in the refrigerator, and product quality It is an object of the present invention to provide a cold air circulation open showcase capable of easily performing maintenance management. In addition, the surface of the display shelf is directly cooled by cold air,
An object of the present invention is to provide a cool air circulation type open showcase having high cooling performance and high cooling operation efficiency. further,
The structure of the cool air ventilation duct and the ventilation path of the display shelf is simple,
It is an object of the present invention to provide a cool air circulation type open showcase capable of reducing manufacturing costs. In addition, the cool air inlet at the front edge of the lower display shelf is disposed so as to be more open than the cool air inlet at the upper display shelf, and the cool air flows into the lower display shelf efficiently, and the cooling efficiency is high. It is another object of the present invention to provide a cold air circulation type open showcase capable of enhancing the cool performance.

[0005]

In order to achieve the above object, a cold air circulation type open showcase according to claim 1 is formed of an inner box and an outer box having a substantially U-shaped vertical cross section and is formed on one surface. A case body having an opening, a cool air ventilation duct formed between the inner box and the outer box, and a cool air outlet communicated with a cool air ventilation duct provided at an upper end of the opening.
In a cool air circulation type open showcase having a cool air suction port communicated with a cool air ventilation duct provided at a lower end of an opening and a display shelf disposed in an inner box, the display shelf includes a shelf upper plate and A lower shelf plate that is spaced apart from the upper shelf plate to form a cool air inlet on the opening side and a cool air outlet on the opposite side of the opening in cooperation with the upper shelf plate and to form a cool air passage. The lower shelf plate has a bent portion that extends outward from an edge of the upper shelf plate and is bent upward on the side of the cool air inlet, and cool air ventilation through the cool air inlet. A cool air ejection hole for ejecting the cool air flowing into the road to the inside of the inner box is provided. In the cool air circulation type open showcase having such features, the cool air flowing from the cool air inlet formed by the cooperation of the upper shelf and the lower shelf of the display shelf flows from the cool air outlet through the cool air ventilation path. The cold air flows out to the far side inside the refrigerator, and cool air flows out from the cool air outlet of the lower plate of the shelf. At this time, at the cold air inlet, the lower plate of the shelf extends outside the edge of the upper plate of the shelf, and a bent portion bent upward is provided, so that the cool air blown out from the cool air outlet is The cooling air is efficiently taken into the cool air passage from the cooling inlet. This allows
The cool air can flow deep into the interior of the refrigerator, allow the cool air to flow through the entirety of the refrigerator, and can apply the cool air to every corner of the product on the display shelf. Furthermore, the shelf top plate is cooled directly by cold air,
The displayed products can be cooled from below. In addition, the cool air efficiently flows to the back side of the inside of the refrigerator, the temperature distribution between the opening side and the back side of the inside of the refrigerator becomes uniform, the cooling operation efficiency can be increased, and the cooling performance can be improved. The displayed product can be efficiently cooled from above and below, and the quality of the product can be easily maintained. Furthermore, the structure of the cool air ventilation duct of the main body and the structure of the cool air ventilation passage of the display shelf are simple structures, and the manufacturing cost can be reduced.

According to a second aspect of the present invention, there is provided a cool air circulation type open showcase according to the first aspect, wherein the display shelves are arranged at least vertically in the inner box. The cool air inlet in the lower display shelf is arranged closer to the opening than the cool air inlet in the upper display shelf. In the cool air circulation type open showcase having such a feature, since the cold air inlet of the lower display shelf is located closer to the opening than the cool air inlet of the upper display shelf, the cool air circulation type open showcase has a lower display shelf. Also, the cool air can be efficiently introduced. Thereby, the cooling efficiency of the lower display shelf can be further increased, and the cooling performance can be improved.
In addition, the manufacturing cost can be reduced.

According to a third aspect of the present invention, there is provided a cool air circulation type open showcase according to the first or second aspect, wherein the inner box is arranged at least vertically in the outer box. And each inner box is independent via a partition wall.
In the cool air circulation type open showcase having such features, the inside of the cool air circulation type open showcase is separated into two upper and lower inner boxes independently, and the temperature of the upper inner box and the lower inner box is controlled. Can be set separately. In addition, since the distance between the cool air outlet and the cool air inlet at the opening is short, the turbulence of the flow of the cool air is reduced, and the temperature rise of the cool air is reduced. Accordingly, it is possible to set the temperature according to the products having different cooling temperatures in one cool air circulation type open showcase, and it is possible to simultaneously display the products having different cooling temperatures.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a cold air circulation type open showcase according to an embodiment of the present invention; FIG. FIG. 1 is a view showing a vertical cross section of a cool air circulation type open showcase 1 according to the present embodiment and a flow of cool air. FIG. 2 is a cross-sectional view of the front edge of the upper and lower display shelves when the upper and lower display shelves are mounted in the inner box 2 of the present embodiment. FIG. 3 is an external view of the upper display shelf 23 of the upper inner box 2 of the present embodiment. In FIG. 1, a cold air circulating open showcase 1 includes an inner box 2 and an inner box 3 having the same structure and having an opening surface on one side.
Up and down so that the opening 4 is on the front surface (right side in FIG. 1)
It is placed on a stage, and the outside of each inner box 2, 3 is covered by an outer box 6 having a heat insulating wall 5. A base 7 is fixedly provided on the lower surface of the outer box 6, and the main body of the cool air circulation type open showcase 1 is arranged on a floor or the like via the base 7. The inner box 2 is made of a metal sheet having a substantially U-shaped vertical section, and has a cool air ventilation duct 10 formed between the inner box 2 and the inner surface 9 of the outer box 6. A cold air outlet 11 and a cold air inlet 12 are formed at the upper and lower ends of the airbag 1 toward the opening 4, respectively. The evaporator 1 is provided in the ventilation duct 10.
3. A blower 14 is provided. In addition, a cool air adjusting hole 15 is formed in the lower corner of the inner wall surface of the inner box 2. Similarly, the inner box 3 is also formed of a thin metal plate having a substantially U-shaped vertical cross section, forms a cool air ventilation duct 17 with the inner surface 16 of the outer box 6, and has an opening 4 of the inner box 3. At the upper and lower ends,
A cool air outlet 18 and a cool air inlet 19 are formed toward the opening 4. An evaporator 20 and a blower 21 are installed in the ventilation duct 17. In addition, a cool air adjusting hole 22 is formed in the lower corner of the inner wall surface of the inner box 3.
An upper display shelf 23 and a lower display shelf 24 are mounted at substantially equal intervals in the up-down direction in the interior of the inner box 2, and an upper display shelf 25 and a lower display shelf 25 are installed in the inner box 3. Display shelves 26 are attached at substantially equal intervals in the vertical direction. Each of the display shelves 23 and 24 is attached with a predetermined interval substantially equal to the inner wall surface of the inner box 2, and each of the display shelves 25 and 26 is also mounted to the inner wall surface of the inner box 3. They are attached with a substantially equal predetermined interval. Further, in the upper display shelf 23 of the inner box 2, a cool air inlet 27 is formed on the opening 4 side, and a cool air outlet 28 is formed on the inner wall side of the inner box 2 (opposite the opening 4). Similarly, the lower display shelf 24 has a cool air inlet 29 on the opening 4 side and a back wall side of the inner box 2 (opposite the opening 4).
, A cold air outlet 30 is formed. As described above, the upper display shelf 25 in the inner box 3 has a cool air inlet 31 on the opening 4 side and a cool air outlet 32 on the inner wall side of the inner box 2 (opposite the opening 4). The lower display shelf 26 is similarly provided with the cold air inlet 3 on the opening 4 side.
3, and a cold air outlet 34 is formed on the inner wall side of the inner box 3 (the side opposite to the opening 4).

As shown in FIG. 2, the cool air inlet 29 of the lower display shelf 24 of the inner box 2 is closer to the opening 4 than the cool air inlet 27 of the upper display shelf 23 (left side in FIG. 2). Are located. Thereby, the cool air blown downward from the cool air outlet 11 is cooled by the cool air inlet 27 of the upper display shelf 23.
At the same time as the cold air inlet 29 of the lower display shelf 24.
Can also be efficiently introduced. In the same manner as described above, the cool air inlet 33 of the lower display shelf 26 of the inner box 3 is also connected to the upper display shelf 2.
5, the opening 4 side of the cold air inlet 31 (right side in FIG. 1)
Are located in This allows the cool air blown downward from the cool air outlet 18 to flow into the cool air inlet 31 of the upper display shelf 25 and also efficiently flow into the cool air inlet 33 of the lower display shelf 26. . In the open showcase 1, the inner boxes 2 and 3 are separated and separated via a partition wall 35 so that ventilation ducts 10 and 17 are formed on the respective outer peripheries.

Next, the structures of the display shelves 23, 24, 25 and 26 are substantially the same, and the structure of the display shelves 23 will be described with reference to FIG. In FIG. 3, the display shelf 23 is
6, a lower shelf plate 37, and a reinforcing plate 38 fixed to the inner surfaces of the upper shelf plate 36 and the lower shelf plate 37 by spot welding or the like. The upper plate 36, the lower plate 37, and the reinforcing plate 3
Reference numeral 8 is formed from a thin metal plate. The shelf upper plate 36 has a flat plate portion 39, and the rear end edge of the flat plate portion 39 forms a bent portion 40 bent downward in an arc of about 90 degrees. The lower shelf plate 37 has a flat plate portion 41 substantially equal to the flat plate portion 39, and a front edge portion of the flat plate portion 41 forms a bent portion 42 bent upward in an arc of about 90 degrees.
The rear end edge forms a bent portion 43 bent downward in an arc of about 90 degrees. Further, display shelf support holes 44 for attaching display shelves are penetrated at front and rear portions slightly inside from the left and right edge portions of the flat plate portion 41. Further, the flat plate portions 39 and 41 of the shelf upper plate 36 and the shelf lower plate 37 face each other, and the shelf upper plate 3
6 and the bent portion 42 of the lower plate 37 form the cold air inlet 27 at a predetermined interval, and the reinforcing plate 38 is located at a predetermined distance inside and substantially at the center from the left and right edge portions of the plate portions 39 and 41. Are fixed substantially parallel to the left and right edge portions of the flat plate portions 39 and 41. The bent portion 40 of the upper plate 36 and the lower plate 3
The cold air outlet 28 is formed by the bent portion 43 of FIG. 7 to form a cool air passage 45 (see FIG. 1). The flat plate portion 41 of the lower shelf plate 37 has a reinforcing plate 38.
Cold air blowout holes 8 are formed at two locations substantially on the center line of the two rows of plane portions sandwiched between the two. Further, the front edge and the rear edge of the upper shelf plate 36 and the lower shelf plate 37 are bent inward so that burrs and the like on the end surfaces do not touch the hands, and are brought into contact with the inner surfaces.

Next, circulation of cold air between the inner box 2 and the inner box 3 will be described with reference to FIG. First, the circulation of cool air in the inner box 2 will be described. The cool air warmed by the blower 14 provided in the cool air ventilation duct 10 rises,
And cooled down to a predetermined temperature, blown out from the cool air outlet 11 below the opening 4 to form a cool air curtain, and flow into each cool air inlet 27, 29 of each display shelf 23, 24. . Further, as shown in FIG. 2, since the cool air inlet 29 is closer to the opening 4 than the cool air inlet 27, the cool air flowing into the cool air inlet 29 of the lower display shelf 24 is blocked by the upper display shelf 23. And flow efficiently. Also,
The cool air curtain flows into the cool air inlet 12 and flows into the cool air ventilation duct 10. Next, the cool air that has flowed into the cool air inlet 27 of the upper display shelf 23 flows through the cool air passage 45 and flows out of the cool air outlet 8 and the cool air outlet 28 (see FIG. 3) formed in the lower plate 37. . Also, the lower display shelf 24
The front end of the shelf lower plate 47 (see FIG. 2) is
Bent portion 49 bent in the same manner as the front end edge of the shelf lower plate 37 of FIG.
The cool air flowing into the cool air inlet 29 formed by the bent portion 49 and the front edge of the shelf upper plate 48 (see FIG. 2)
It flows through the cool air ventilation 46 and flows out from the cool air outlet 8 and the cool air outlet 30 formed in the lower shelf 47. Then, it flows into the cool air adjusting hole 15 in the lower corner of the inner wall surface. Thus, each outlet 2 of each cool air ventilation passage 45, 46 of each display shelf 23, 24.
8 and 30, cool air flows out to the back side of the inner box 2, and cool air flows out of the cool air outlet 8 of the shelf lower plates 37 and 47.
The cool air flows to the back of the inner box 2 and can flow the cool air to the entire inner box 2, and the cool air can be applied to every corner of the display shelves 23 and 24. Furthermore, each display shelf 23, 24
Are directly cooled by cold air, and the displayed products can be cooled from below.
This allows the cool air to efficiently flow into the lower display shelf 24, and allows the cool air to efficiently flow to the back side of the inner box 2, so that the cold air flows between the opening 4 side and the back side of the inner box 2. The temperature distribution becomes uniform, the cooling operation efficiency can be increased, and the cooling performance can be improved.Moreover, the displayed products can be efficiently cooled from above and below, and the quality maintenance of the products can be easily performed. Become. Furthermore, the cool air ventilation duct 10 of the inner box 2
And the cool air passages 45, 46 of the display shelves 23, 24
Is a simple structure, and the manufacturing cost can be reduced.

Next, the circulation of cool air in the inner box 3 will be described. The cool air heated by the blower 21 provided in the cool air ventilation duct 17 rises, flows through the evaporator 20, is cooled to a predetermined temperature, is blown out from the cool air outlet 18 below the opening 4, and is cooled by the cool air curtain. And flows into the respective cool air inlets 31 and 33 of the display shelves 25 and 26. Further, since the cool air inlet 33 of the lower display shelf 26 is closer to the opening 4 than the cool air inlet 31 of the upper display shelf 25, the cool air flowing into the cool air inlet 33 of the lower display shelf 26 is discharged from the upper display shelf 26. 25, it flows in efficiently without being blocked. Also,
The cool air curtain flows into the cool air suction port 19 and flows into the cool air ventilation duct 17. Next, the cool air flowing into the cool air inlet 31 of the upper display shelf 25 flows through the cool air passage 50 and flows out from the cool air outlet 8 and the cool air outlet 32 formed in the shelf lower plate 51 of the upper display shelf 25. . The cool air flowing into the cool air inlet 33 of the lower display shelf 26 is cooled by the cool air passage 5.
2 and flows out of the cool air outlet 8 and the cool air outlet 34 formed in the shelf lower plate 53 of the lower display shelf 26. Then, it flows into the cool air adjusting hole 22 at the lower corner of the inner wall surface. In this way, the cool air flows out from the outlets 32, 34 of the cool air ventilation passages 50, 52 to the inner side of the inner box 3, and the display shelves 25, 2
Since the cool air flows out from the cool air outlet 8 of each of the shelf lower plates 51 and 53 of FIG. 6, the cool air flows to the depth of the inner box 3 and can flow through the entire inner box 3 and the display shelves 25 and 26 You can apply cold air to every corner of the product. Furthermore, each shelf upper plate 54, 55 of each display shelf 25, 26 is directly cooled by cold air, so that the displayed products can be cooled from below.
This allows the cool air to efficiently flow into the lower display shelf 26, and allows the cool air to efficiently flow to the back side of the inner box 3 so that the space between the opening 4 side and the back side of the inner box 3 can be formed. The temperature distribution becomes uniform, the cooling operation efficiency can be increased, and the cooling performance can be improved.Moreover, the displayed products can be efficiently cooled from above and below, and the quality maintenance of the products can be easily performed. Become. Furthermore, the cool air ventilation duct 17 of the inner box 3
Structure and each cool air passage 50, 52 of each display shelf 25, 26
Is a simple structure, and the manufacturing cost can be reduced.

Further, the inner box 2 and the inner box 3 are placed in upper and lower tiers, and the ventilation duct is partitioned by the partition wall 35, so that the inside of the cold air circulation type open showcase 1 can be vertically
The upper and lower inner boxes 2 and 3 are independently separated from each other, so that the temperatures of the upper and lower inner boxes 2 and 3 can be set separately. In addition, each cool air outlet 11, 18 of each opening 4 and each cool air inlet 12, 19
, The turbulence of the flow of the cool air is reduced, and the temperature rise of the cool air is reduced. This allows
In the same cold air circulation type open showcase 1, it is possible to set the temperature according to the products having different cooling temperatures, and it is possible to simultaneously display the products having different cooling temperatures. In addition, since the temperature rise of the cold air can be suppressed low, it is possible to further improve the performance of heat shielding from outside air and the performance of keeping cold.

It should be noted that the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the spirit of the present invention. Good. (A) In the present embodiment, the display shelves in each of the inner boxes 2 and 3 have two tiers, but the number of display shelves is arbitrary. Also,
Although the vertical mounting intervals of the display shelves are substantially equal, the vertical mounting intervals are also arbitrary. (B) The number of perforated cooling air holes 8 on the lower surface of each display shelf 23, 24, 25, 26 is four, but may be more than four.

[0015]

As described above, according to the cold air circulation type open showcase according to the first aspect, the shelf upper plate, the shelf lower plate, and the inner surfaces of the shelf upper plate and the shelf lower plate formed of a thin metal plate. By forming a cold air ventilation passage from the reinforcing plate and arranging a plurality of display shelves with a plurality of cool air ejection holes in the lower plate of the shelf vertically in the refrigerator, a cold air outlet from the display shelf can be used. Cool air flows out to the back side, and cool air flows out from the cool air outlet of the lower plate of the shelf, so that the cool air can flow deep into the interior of the cabinet and can flow through the entire interior of the cabinet. Cold air can be applied to every corner. Further, the shelf upper plate is directly cooled by cold air, and the displayed products can be cooled from below. Thereby, the cool air efficiently flows to the inner side of the refrigerator, the temperature distribution between the opening side and the inner side of the refrigerator becomes uniform, the cooling operation efficiency can be increased, and the cooling performance can be improved. Further, the displayed products can be efficiently cooled from above and below, and the quality of the products can be easily maintained. Furthermore, the structure of the cool air ventilation duct of the main body and the structure of the cool air ventilation path of the display shelf are simple structures, and a cold air circulation open showcase that can reduce the manufacturing cost can be provided.

Further, according to the cool air circulation type open showcase according to the second aspect, the cool air inflow port of the lower display shelf is disposed so as to be closer to the opening than the upper display shelf. The cool air can be efficiently flowed into the display shelf. Thereby, it is possible to increase the cooling efficiency of the lower display shelf, and it is possible to improve the cooling performance. In addition, it is possible to provide a cold air circulation type open showcase that can reduce the manufacturing cost.

Further, according to the cool air circulation type open showcase according to the third aspect, an evaporator and a blower are built in each inner box, and the inner boxes are mounted in two upper and lower tiers, and the inner boxes are arranged via partition walls. By partitioning the ventilation duct, the inside of the cool air circulation type open showcase is separated into two upper and lower stages independently, and the temperature of the upper inner box and the lower inner box can be set separately. In addition, since the distance between the cool air outlet and the cool air inlet at the opening is short, the turbulence of the flow of the cool air is reduced, and the temperature rise of the cool air is reduced. Thus, it is possible to set the temperature in accordance with the products having different cooling temperatures in one cool air circulation type open showcase, and to provide a cooling air circulation type open showcase which can simultaneously display products having different cooling temperatures. be able to.

[Brief description of the drawings]

FIG. 1 is a view showing a vertical section and a flow of cool air of a cool air circulation type open showcase according to an embodiment.

FIG. 2 is a cross-sectional view of the front edges of the upper and lower display shelves when the display shelves are mounted in the inner box of the embodiment.

FIG. 3 is an external view of an upper display shelf of the upper inner box of the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cold air circulation type open showcase, 2, 3 ... Inner box, 5 ... Insulated wall 8 ... Cool air outlet, 10, 17 ... Cool air ventilation duct, 1
1, 18: cold air outlet 12, 19: cold air inlet, 13, 20: evaporator, 1
4, 21 ... blower 23, 25 ... upper display shelf, 24, 26 ... lower display shelf,
45, 50, 46, 52 ... cold air passage

Claims (3)

[Claims] 1. A case main body formed of an inner box and an outer box having a substantially U-shaped vertical section and having an opening on one surface,
The cool air ventilation duct formed between the inner box and the outer box, the cool air vent connected to the cool air ventilation duct provided at the upper end of the opening, and the cool air ventilation duct provided at the lower end of the opening In a cool air circulation type open showcase having a cool air suction port that is communicated with and a display shelf disposed in an inner box, the display shelf has a shelf upper plate and an opening side in cooperation with the shelf upper plate. A cold air inlet and a cold air outlet on the opposite side of the opening, and a shelf lower plate spaced apart from the shelf upper plate to form a cool air ventilation path. A bent portion that extends outward from the edge of the shelf upper plate at the air flow inlet side and is bent upward, and cool air that has flowed into the cool air ventilation passage through the cool air flow inlet into the inner box. Characterized by being provided with a cool air blow-off hole which blows toward the cold air Showcase. 2. The display shelves are arranged at least in upper and lower stages in the inner box, and the cool air inlet in the lower display shelf is closer to the opening than the cool air inlet in the upper display shelf. The cool air circulation type open showcase according to claim 1, wherein the cool air circulation type open showcase is arranged. 3. The inner box is arranged in at least two upper and lower stages in the outer box, and each inner box is independent via a partition wall. Open air showcase with cool air circulation.