JPS6219671B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field The present invention relates to a flat show case in which an air curtain of forcedly circulated cold air is formed in an opening for loading and unloading products formed on the top surface.

(b) Background art and its problems The flat refrigerating case shown in Publication of Utility Model Publication No. 52-22673 has partition walls with a U-shaped cross section arranged at intervals inside an insulating wall with an open top surface. A product storage section is defined on the inside and a cold air circulation duct is defined on the outside. A cooler and a blower are installed in the cold air circulation duct, and the upper surface of the product storage section is directed from the upper cold air outlet to the cold air intake. It is configured so that cold air flows across it. The portions of the heat insulating wall and partition wall located at the front are each provided with a heat insulating transparent plate, so that the product can be seen through from the front.

According to this configuration, the inner surface of the transparent plate provided on the upper wall of the heat insulating wall is exposed to low-temperature returning cold air,
In addition, since the outer surface is exposed to high temperature outside air,
Not only does the large heat loss of the cold air cause an increase in the refrigeration load, but the dew that adheres to the outer surface impairs the see-through effect, and the sash installed at the top of this transparent plate impedes the display effect. was.
In addition, because the height of the transparent plate installed on the compartment wall is lower than the products stored in the product storage section, the downstream of the cold air curtain that closes the opening comes into contact with the products, creating a turbulent flow. Due to the nature of the air flow, the downstream flow velocity, where the initial velocity of the air outlet is impaired, is slow and tends to drop, making the turbulence even more severe, and the amount of outside air entering the air curtain increases.In other words, the leakage of cold air from the openings increases, and the refrigeration The increase in load was unprecedented compared to previous flat refrigeration cases.

(c) Object of the present invention To prevent condensation on the outermost transparent plate without impairing the see-through effect of the storage room, and to prevent an increase in refrigeration load by changing the suction height of return cold air according to the height of stored products. The purpose is to prevent it.

(d) Embodiments of the present invention Reference numeral 1 shown in FIGS. 1 and 2 is a flat show case whose main body is constituted by a heat insulating wall 2 having an opening 3 for loading and unloading products on the upper surface, and an inner wall of the heat insulating wall. U-shaped partition plates 4 are arranged at appropriate intervals to form a storage chamber 5, a plate fin type cooler 6,
It is equipped with a cold air passage 9 in which an axial blower 7 and a fan case 8 for supporting the blower are installed, and a wind direction blade 12 located at the rear of the opening 3 and whose inclination angle is variable as the shaft 11 rotates. Air outlet 13 facing forward
and a suction port 14 which is located in front of the opening 3 and whose height is lower than the lower edge of the outlet. As shown in FIG. 2, this suction port is formed by bending the front wall 4A of the partition plate 4 at right angles to the front, and is covered by a cover portion 4B having a large number of holes 15. Reference numeral 16 denotes a first transparent plate made of glass arranged vertically along the inside of the suction port 14, and includes a front wall 4A of the partition plate and a holding member 1 fixed to the upper part of the front wall.
It is removably stored in a first storage groove 18 defined by 7, and its upper end extends above the suction port 14. Reference numeral 19 denotes a second transparent plate made of glass arranged vertically along the outside of the suction port 14, and includes a holding portion 4C extending downward from the front end of the cover portion, and a heat insulating wall 2.
It is removably stored in the second storage groove 20 defined by the front wall 2A of the front wall 2A, and the upper end thereof extends above the first transparent plate 16. Reference numeral 21 denotes a third transparent plate made of glass that is vertically arranged along the outside of the second transparent plate 19 with a distance L therebetween, and the upper part of the third transparent plate 21 is curved toward the rear. The extension part 21A is formed to cover the upper end with a gap M, and is housed in a third storage groove 22 formed in the upper part of the front wall of the heat insulating wall. 23 is a heating element such as an electric heater placed on the upper part of the front wall 2A and covered with a heat transfer plate 24;
The heat dissipated constantly heats the air at intervals L.

Next, cold air circulation will be explained.

The cold air heat-exchanged in the cooler 6 is forced to circulate in the blower 7 as shown by the arrow, forming an air curtain CA that closes the opening 3. The blowout angle of this air curtain is adjusted by the wind direction vanes, and the height at which the air is sucked in changes depending on the presence or absence of the first transparent plate 16. That is, when the first transparent plate 16 is present, the air curtain CA flows as shown by the solid line, and when it is not present, the air curtain CA flows as shown by the chain line.

According to this configuration, each of the first to third transparent plates 1
6, 19, and 21 themselves are all transparent, so the first
The perspective effect of the storage chamber 5 through the third transparent plates 16, 19, 21 is very good, and the dimensional relationship of the transparent plates is 21>19>16. Not only can the opening 3 be blocked by both the transparent plates 19 and 21 to prevent overflow of the return cold air returning to the cooler 9, but also the gap M between the second and third transparent plates 19 and 21 can be Therefore, while the third transparent plate 21 is attached, the second transparent plate 19
Therefore, when both the first and second transparent plates 16, 19 are removed, both the front and back sides of the first to third transparent plates 16, 19, 21 can be cleaned. The warm air generated at the interval L caused by the heating prevents dew condensation not only on both the front and back surfaces of the third transparent plate 21 but also on the surface of the second transparent plate 19, and the extending portion 21A of the third transparent plate 21 is used as a handrail and a warm air retainer. In addition to maintaining the heated state of the extension part 21A that is touched by the customer at a temperature above the dew point when purchasing a product to prevent condensation, warm air from the interval M to the interval L can gradually escape. This prevents overheating of both the second and third transparent plates 19 and 21, and in particular avoids an increase in the refrigerating load of the returning cold air caused by overheating of the second transparent plate 19. Since the first transparent plate 16 attached to the upper end of the wall 4A can increase the suction height of the return cold air, the downstream height of the air curtain CA is raised, thereby making it higher than the suction port 14. Not only can tall products be stored, and the effective internal volume of the storage chamber 5 can be substantially increased according to the height of the product, turbulence caused by the product can be prevented downstream of the air curtain CA, and the opening 3 An increase in refrigeration load can be avoided.

(e) Effects: The perspective effect of the storage room becomes very good, condensation on the outermost transparent plate can be prevented, and turbulent flow downstream of the air curtain can be prevented to prevent an increase in the refrigeration load.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the flat show case of the present invention, and FIG. 2 is an enlarged perspective view of FIG. 1A. 2...Insulating wall, 3...Opening, 4...Dividing board,
5...Storage room, 6...Cooler, 7...Blower, 9
... cold air passage, 13 ... air outlet, 14 ... suction port, 16 ... first transparent plate, 19 ... second transparent plate,
21...Third transparent plate, 21A...Extending portion, 23...
...Heating element, L, M... Spacing, CA... Air curtain.

Claims (1)

[Claims] 1. The main body is composed of an insulating wall with an opening for loading and unloading products on the top surface, and a partition plate is provided at an appropriate distance from the inner wall of the insulating wall, and a storage room, a cooler, and a blower are installed. A flat shape formed by forming a cold air passage, a forward-facing air outlet located at the rear of the opening, and an upward-facing suction port located at the front of the opening, and forming an air curtain of forced circulation cold air at the opening. In the show case, a first transparent plate is removably arranged along the inside of the suction port, which is the upper end of the front wall of the partition plate, and whose upper end extends upward from the suction port; is,
a second transparent plate whose upper end extends upward from the upper end of the first transparent plate; a third transparent plate having an extending part that covers the upper end of the transparent plate at a distance and serves as a handrail part and a warming air retaining part; and a heating element that heats the air in the space between the second and third transparent plates. A flat case with a