JP2001027470A - Refrigeration/cold storage open showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the increase of a loading to a refrigerator to a minimum by providing an outlet for cold air on the back surface side between a mirror and a display shelf on the uppermost stage in a casing, and feeding the blown out cold air along the upper surface of the display shelf on the uppermost stage. SOLUTION: A cold air outlet 3 from which, cold air is blown out into a casing 2, is provided on the back surface side between a mirror 4 on the ceiling section of the casing 2 and a display shelf 5 on the uppermost stage, i.e., by opening the upper section of an internal panel 12. Therefore, the ceiling section of the casing 2 and the back surface section above the cold air outlet 3 become non-cooled areas, and a wall in which a heat insulating material is not filled, i.e., a non-heat-insulating wall is used for them. The heat insulating material P is filled in the remaining lower front surface section, the cross section of which presents an approx. U-shape, the bottom surface section and the back surface section. Therefore, this showcase 1 cools only an internal volume required for the blowing out of the cold air from the lower section of the mirror 4. Thus, the cooling internal volume is reduced more than a conventional product, and the load is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multistage refrigerated / refrigerated open showcase in which goods placed on a display shelf are covered with a cool air curtain to keep cool. The present invention relates to a low-load multi-stage refrigeration / refrigeration open showcase in which the distance from the outlet to the uppermost display shelf is increased, and the problem of increased load on the refrigerator due to entrainment of outside air is solved.

[0002]

2. Description of the Related Art Conventional multi-stage freezing and refrigeration open showcases have a single air curtain (daily), a double air curtain (meat), a triple air curtain (freezing), etc., depending on the cooling temperature in the refrigerator. Select and use properly. FIG. 3 shows a multistage refrigerated / refrigerated open showcase 31 using a double air curtain. The open showcase 31 has a casing 3 having a front opening and a substantially U-shaped cross section.
2 is filled with a heat insulating material. Between the casing 32 and the inner panel 33, a cold air circulation duct 37 (a bottom duct 37a, a rear duct 3) provided with a cool air circulation fan 35 and a cooler 36 inside through an intermediate partition wall 34.
7b, a ceiling duct 37c), and a non-cooled air circulation duct 39 provided with a non-cooled air circulation fan 38 outside the ceiling duct 37c).
(Bottom duct 39a, back duct 39b, ceiling duct 3
9c) is provided.

The cool air C from the cool air circulation duct 37
A is blown downward from a cool air outlet 40 formed inside the upper front end of the casing 32, and the non-cool air GA from the non-cool air circulation duct 39 is discharged from the casing 32.
Blows downward from a non-cool air outlet 41 formed in front of the cool air outlet 40 at the upper front end of the casing 32, and the front opening of the casing 32 is opened by a double air curtain of inner and outer layers of the cool air CA and the non-cool air GA. The product placed on the display shelf 42 in the refrigerator is kept cool. The cool air and the non-cool air blown out to form the inner and outer layer air curtains,
A suction port at the lower front portion of the casing 32 (the inner layer suction port 4
3, from the outer layer suction port 44), each is guided to the cool air circulation duct 37 and the non-cool air circulation duct 39, and circulated. Note that the hatching in the T portion indicates the cooling part of the showcase 31.

[0004] A first lamp (canopy lamp) 45 for illuminating the front of the refrigerator from the front is disposed on the ceiling portion of the casing 32, and illuminates the displayed commodities in the refrigerator behind the cool air outlet 40. A second lamp (honeycomb back lamp) 46 is provided. Also, the second lamp 4
A mirror 47 for producing a display effect is attached to the uppermost display shelf 42 from the rear of the display shelf 6.

[0005]

By the way, in the conventional open showcase 31, the cold air outlet 40 is
7, the cooling was performed including the mirror part having a relatively large internal volume, which cannot actually display the product. However, when a mirror is formed in the cooling area, there is a problem that the mirror is fogged during defrosting and the effect cannot be exhibited. In recent years, mirrors have become larger in size due to narrowing down items to prevent product loss and improving the effect of the products. for that reason,
In the conventional structure, the distance from the cold air outlet to the uppermost display shelf tends to be long, but there is a problem that outside air is generated in this portion and the load on the refrigerator increases. Further, since the second lamp (honeycomb back lamp) 46 is provided behind the cool air outlet 40, there is a problem that the illuminance is reduced by cooling, and the load is increased by generation of a heat source. Further, conventionally, since the distance from which the cool air exiting the cooler 36 reaches the outlet is long, there has been a problem that the outlet temperature rises and the load increases due to heat intrusion from the inner panel 33 side. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems. The present invention provides a mirror and a lamp (a back lamp of a honeycomb) outside a cooling portion and a distance at which cool air exiting a cooler reaches a cool air outlet. It is an object of the present invention to provide a low-load multi-stage refrigeration / refrigeration open showcase in which an increase in load on a refrigerator is minimized by shortening or the like.

[0007]

In order to solve the above-mentioned problems, according to the present invention, a plurality of display shelves are provided in a casing warehouse having a front opening, and goods placed on the display shelves are covered with cold air. In a multi-stage freezing and refrigerated open showcase having a lamp for illuminating the inside of the refrigerator at the ceiling of the casing and illuminating a display effect above the uppermost display shelf, the cold air outlet is provided. Is provided between the mirror and the uppermost display shelf and on the back side in the casing storage, so that the cool air blown out from the outlet is supplied into the storage along the uppermost display shelf upper surface. It is characterized by having.

Further, according to the present invention, the lower part of the casing, the lower front part, the bottom part, and the back part, from the lower part to the cool air outlet forming part are formed by heat insulating walls, and the rear part and the ceiling part above the cool air outlet are provided. Is characterized by being formed by a non-insulated wall to be a non-cooling part.

Further, the present invention provides a cooling air circulation system between a heat insulating wall that covers a lower front portion, a bottom portion, and a back portion of the casing from a lower portion to a cool air outlet forming portion, and an internal panel in a casing storage. In addition to forming the duct, an intermediate wall is provided on the heat insulating wall side of the circulation duct, and a sealed air layer having a small heat transfer coefficient is formed between the intermediate wall and the heat insulating wall.

[0010] By adopting such a configuration, the mirror and the second lamp (particularly, the honeycomb back lamp) can be arranged in the non-cooled portion, and the cool air exiting the cooler can be blown out at a short distance. So you can reach
The load on the refrigerator can be minimized. Further, by forming the air layer, the heat insulating effect can be enhanced, and the cooling efficiency can be further improved.

[0011]

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a low-load multistage freezing / refrigeration open showcase of the present invention, and FIG. 2 is a sectional side view of the open showcase.

As shown in FIGS. 1 and 2, a low-load multi-stage refrigerated / refrigerated open showcase 1 of the present invention includes a cold air outlet 3 for blowing cold air into a casing 2 and a mirror at the ceiling of the casing 2. The rear side between the display shelf 4 and the uppermost display shelf 5, that is, the upper part of the inner panel 12, is provided with an opening. Therefore, since the ceiling part of the casing 2 and the rear part above the cool air outlet 3 are uncooled parts, a wall that is not filled with a heat insulating material, that is, a non-heat insulating wall, is used, and the heat insulating material P is substantially the same as the remaining cross section. The U-shaped lower front portion, bottom portion, and back portion are filled.

Therefore, according to the arrangement structure of the cool air outlet 3 of the present invention, the second lamp (honeycomb back lamp) 46 which is located at the rear cooling part of the cool air outlet 40 of the conventional open showcase, The mirror 47 provided over the uppermost display shelf 42 from the rear of the mirror 46 can also be located at the non-cooled portion. In the present invention, the second
The lamp 6 is provided closer to the rear of the first lamp 7, and the mirror 4 is provided from the rear of the ceiling of the casing 2 to the upper part of the uppermost display shelf 5 as in the conventional case. Is a non-cooled portion where no cool air circulates. Therefore, it is possible to prevent the heat of the lamps 6 and 7 from adversely affecting the cool air circulation and prevent the mirror 4 from fogging. In addition, the second lamp 6 is
The size of the mirror 4 can be increased by an amount closer to the lamp 7, and the upper part can be brought forward, so that the effect can be further enhanced.

According to this structure, unlike the conventional air curtain system, the cool air blown out from the cool air outlet 3 keeps the products in the refrigerator cool by a cool air circulation system. That is, the cool air CA blown out from the cool air outlet 3 flows along the upper surface of the uppermost display shelf 5 and moves forward, falls downward from the tip of the display shelf 5, and keeps the inside of the refrigerator cool. The cool air CA that keeps the products in the refrigerator cool enters the cool air circulation duct 9 (the bottom duct 9a and the rear duct 9b) through the suction port 8 at the lower front part of the casing 2, and is attracted to the cool air circulation fan 10 inside the duct 9. The heat is exchanged with the cooler 11, and the air is blown out from the cool air outlet 3 again to circulate.
Note that the hatching in the TT portion indicates a cooling part of the showcase 1.

The open showcase 1 of the present invention
An intermediate panel 13 is provided between the heat insulating wall 2a covering the lower front part, the bottom part, and the rear part of the casing 2 from the lower part to the cool air outlet forming part, and the internal panel 12 in the casing 2 cabinet. The cool air circulation duct 9 is provided inside the intermediate panel 13. This intermediate panel 1
A closed air layer A is formed outside of 3 by using a gap surrounded by the heat insulating wall 2a and closing the upper and lower portions. Since the sealed air layer A has a small heat transfer coefficient, the heat insulating effect of the heat insulating wall 2a is further improved, the heat insulating effect of the bottom surface and the rear surface of the showcase is further improved, and the cool effect of the entire showcase is enhanced.

[0016]

As described above, according to the low-load multi-stage freezing and refrigeration open showcase of the present invention, the following effects can be obtained. (1) Conventionally, since the cool air is blown out from the front part of the mirror, cooling is performed including the mirror part where the product cannot be actually displayed. As a result, the internal volume of the cooling is reduced and the load is reduced. (2) Since the mirror is configured as a non-cooled portion, the mirror does not fog during defrosting. (3) Although the conventional honeycomb back lamp is arranged in the cooling portion, in the present invention, since all the lamps on the ceiling are formed in the non-cooling portion, the lamp is brightened without being cooled. (4) Although the conventional honeycomb back lamp is arranged in the cooling part, in the present invention, since all the lamps on the ceiling are configured in the non-cooling part, the heat source in the cooling cabinet is reduced, and the load is reduced. (5) Since the distance from which the cool air that has exited the cooler reaches the cool air outlet is shortened, an increase in the outlet temperature is suppressed. (6) Since the distance that the cool air that has exited the cooler reaches the cool air outlet is reduced, the load due to heat intrusion from the inner panel side is reduced. (7) Since the interval between the blowing and the suction, which is the flow path of the cool air, is shortened, the contact surface between the cool air layer and the non-cool air layer (outside air layer) is reduced, and the load is reduced. (8) In recent years, since the size of the mirror has been increased in order to produce a product effect, the distance from the outlet to the uppermost display shelf tends to be longer in the conventional structure, and outside air is trapped in this portion. However, the showcase structure of the present invention
Due to the circulation system in which the cool air flows down from the cool air outlet along the uppermost display shelf, the entrainment of outside air in this portion is reduced, and the performance is improved. (9) Unlike the conventional air curtain system, a cool air circulation system in which cool air flows down from the cool air outlet along the uppermost display shelf upper surface can suppress the amount of cool air to be blown out. By putting it out from the (inner panel) to the inside of the storage, each display shelf can be efficiently cooled. (10) By forming a closed air layer between the heat insulating wall and the duct through which the cooled air flows, it is possible to further enhance the heat insulating effect as compared with the conventional single air curtain method, and to reduce the load due to heat intrusion. Decrease. (11) The lower front part, the bottom part, and the back part are formed from the lower part to the cold air outlet forming part by the heat insulating wall, and the rear part and the ceiling part above the cool air outlet are formed by the non-insulating wall. The number of places for filling the material is smaller than before.

[Brief description of the drawings]

FIG. 1 is a perspective view of a frozen / refrigerated open showcase of the present invention.

FIG. 2 is a cross-sectional side view of a freezing / refrigerated open showcase of the present invention.

FIG. 3 is a cross-sectional side view of a conventional freezing / refrigerated open showcase.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 open showcase 2 casing 3 cool air outlet 4 mirror 5 display shelf 6 second lamp 7 first lamp 8 inlet 9 cool air circulation duct 9 a bottom duct 9 b back duct 10 cool air circulation fan 11 cooler 12 internal panel 13 air Layer P Insulation material T, TT Cooling part

Claims (3)

[Claims] 1. A lamp having a plurality of display shelves in a casing storage with a front opening and covering the goods placed on the display shelves with cool air to keep cool and irradiating the inside of the storage with a casing ceiling. And a multi-stage refrigerated / refrigerated open showcase provided with a mirror for producing a display effect above the uppermost display shelf, wherein the cool air outlet is located between the mirror and the uppermost display shelf. A refrigerator / refrigeration open showcase provided on the back side in the casing storage, and supplying the cool air blown out from the outlet along the upper surface of the display shelf into the storage. 2. A lower front part, a bottom part, and a lower part of the casing.
2. The refrigeration system according to claim 1, wherein a portion from below the rear portion to the cold air outlet forming portion is formed by a heat insulating wall, and a rear portion and a ceiling portion above the cold air outlet are formed by non-insulating walls.・ Refrigerated open showcase. 3. A lower front part, a bottom part, and a lower part of the casing.
And a heat insulating wall covering from below the rear part to the cool air outlet forming part, and forming a circulation duct of cool air between the inner panel in the casing storage, and providing an intermediate wall on the heat insulating wall side of the circulation duct, 3. The refrigerated / refrigerated open showcase according to claim 2, wherein a closed air layer having a small heat transfer coefficient is formed between the intermediate wall and the heat insulating wall.