JPH11128031A - Dual freezing and refrigerating show case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cool air circulation-type dual freezing and refrigerating show case by which the combination of usage temp. (freezing and refrigerating) is freely set by one show case while effectively utilizing in-store space and also commodity taking-out property is considered. SOLUTION: The show case is constituted by combining a cool air circulation- type open show case 3 forming a cool air curtain B in the front open area of a case main body 3a by executing blowing from an upper part with a cool air circulation-type flat show case 2 forming the cool air curtain A in the upper open area of the case main body 2a by executing blowing from a rear part in upper and lower steps. The in-compartment temp. of the open show case 3 is set to be different from that of the flat show case 2 in usage temp. so as to individually control in-compartment temp.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dual-type freezing and refrigeration showcase in which a cool air circulation type open showcase and a cool air circulation type flat showcase are combined in upper and lower stages.

[0002]

2. Description of the Related Art Conventionally, as a frozen showcase for displaying and selling frozen products such as ice cream, as shown in FIG. 3, a reach-in type showcase and a flat type showcase are combined in the upper and lower stages, and both cases are stored. A dual-type showcase called a "pair freezer" that manages the inside at the same operating temperature has already been commercialized.

In FIG. 3, reference numeral 1 denotes a reach-in type showcase, and 2 denotes a flat type showcase.
The dual type showcase is constructed by stacking the upper and lower two integrally. Here, the upper-stage reach-in type showcase 1
Has a product display shelf 1c disposed inside a case body (insulated housing) 1b having a transparent glass door 1a on the front surface, and is defined between an outer box and an inner box of the inner case body 1b. A cooler (evaporator of a refrigerator) 1e and a fan 1f are arranged in the cool air circulation duct 1d, and in this configuration, cool air is circulated and blown into the refrigerator to keep the products displayed on the product display shelf 1c and the deck pan at the bottom of the refrigerator. I do.

On the other hand, in the flat showcase 2, a cooler 2c and a fan 2d are arranged in a cool air circulation duct 2b defined between an outer box and an inner box of an open-top case body 2a.
With this configuration, the cool air curtain A is blown out from the rear side to the open area of the upper surface of the case body 2a to keep the goods stored in the refrigerator cool. The cooler 1 of the reach-in type showcase 1 and the cooler 2c of the flat type showcase 2 are connected in parallel to a condensing unit (not shown) of a separately-installed refrigerator, and are operated at the same upper and lower set temperature in the refrigerator. Control (thermocycle control) is performed.

[0005]

In recent years, convenience stores, which are small stores, have been rapidly spreading, and correspondingly, the need for relatively small and multifunctional showcases has been increasing. . That is, despite the fact that the store space in a convenience store is smaller than that in a supermarket or the like, there are many items of products (foods) from frozen foods to lunch boxes and prepared dishes. From this point of view, there is a demand for a showcase that can effectively display the space and effectively sell and store various frozen items such as ice cream and refrigerated items such as lunch boxes and prepared dishes by using a single showcase.

SUMMARY OF THE INVENTION The present invention has been made in response to the above-mentioned demands, and a combination of operating temperatures (freezing and refrigeration) can be freely set in one showcase while effectively utilizing the space in a store. Another object of the present invention is to provide a cold-air circulation type dual freezing and refrigeration showcase that also takes into account the ease of taking out products.

[0007]

According to the present invention, there is provided a cold air circulation type open showcase which blows out a cold air curtain from above in an open front area of a case body, and a case body. It is configured to combine a cool air circulation type flat showcase that blows out a cool air curtain from the back in the upper open area of the upper and lower stages,
The internal temperature of the upper open showcase and the lower flat showcase are set to different operating temperatures, and the internal temperature is individually controlled (claim 1).

According to the dual-type refrigerated showcase having the above-described structure, an open showcase is stacked on a flat-type showcase to form a three-dimensional structure, so that a narrow store space such as a convenience store can be effectively used. Items can be displayed and sold, and since there is no door on the front of the showcase as in a reach-in type showcase, it is easy to put products in and out and select products. In addition, since the operating temperature of the open showcase and the flat type showcase are individually set to control the temperature, the combination of freezing / refrigeration and the operating temperature can be freely set between the upper and lower cases, and the frozen product, Display and sell refrigerated goods.

Further, according to the present invention, in the above-mentioned dual type showcase, the cool air leaking from the front of the open showcase arranged in the upper stage interferes with the cool air curtain of the flat showcase arranged in the lower stage to be disturbed. In order to suppress as much as possible, a cool air blow-off hole for blowing a part of the circulating cool air flow from the middle of the cool air circulation path toward the front inside the cooler is opened in the back panel inside the cooler of the open showcase (claim 2).
Specifically, the cool air blowing holes are distributed above and below the product display shelves arranged in the refrigerator and open in the left-right direction (claim 3).

As described above, a part of the circulating cold air is blown forward from the back panel inside the open showcase on the upper side, so that the cold air leaks from the cool air curtain formed from the front of the case body from above. The flow direction (flows out of the cabinet without being collected into the air curtain suction opening opened in the lower part of the front of the case body) is oblique from the vertical direction due to the cool airflow that blows forward from the back panel inside the cabinet. You will be heading forward. Therefore, against the laminar flow of the cold air curtain that blows from the rear to the front in the upper open area of the lower flat showcase, the leaked cool air from the upper case does not directly hit the vertical direction,
As a result, laminar turbulence of the cool air curtain of the flat type showcase is minimized, and the performance of the air curtain can be maintained.

[0011] Further, since the cool air blow-out holes are dispersed and opened at positions above and below the product display shelves arranged in the refrigerator, unnecessary cooling air flow into the refrigerator and the product display shelves are unnecessary. Interference can be prevented.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the drawings of the respective embodiments, the same members corresponding to FIG. 3 are denoted by the same reference numerals. Embodiment 1 FIGS. 1 (a) and 1 (b) show the configuration of a basic embodiment. In FIG. 1 (a), a cold air circulation type open showcase 3 is mounted on a flat showcase (showcase similar to that described in FIG. 3) 2, and the two showcases are integrally joined to form a dual type showcase. Make up. Here, the upper open showcase 3 has a cooler 3c and a fan 3d arranged in a cool air circulation duct 3b defined between an outer box and an inner box of a front open case body 3a. A cold air curtain B is blown out from above in the front open area of the main body 3a to keep the product display shelves 3e arranged in the refrigerator and the products stored in the bottom of the refrigerator cool.

Further, the coolers 2c,
The cooler 3c of the open showcase 3 is shown in FIG.
As shown in the refrigeration circuit diagram of FIG.
Refrigerator condensing unit 5 separately provided via 4b
Are connected in parallel. In addition, 5a is a compressor and 5b is a condenser. Here, the solenoid valves 4a and 4b are provided with a set value of an operating temperature (freezing, refrigeration, or non-cooling) individually set for each of the showcases 2 and 3 by the temperature controller 6, and a temperature of each showcase. Open / close control is performed by comparing the inside temperature detected by the sensors 7a and 7b, and the inside temperature control is performed so that the inside of the flat showcase 2 and the open showcase 3 is maintained at the individually set use temperature. .

[Embodiment 2] FIGS. 2A and 2B show Embodiment 1 described above.
This shows an application example of the present invention in which is improved. That is, in the configuration of FIG. 1, the open showcase 3 (upper)
When a part of the cool air curtain B that blows out from the upper side toward the lower air curtain suction opening into the front open area of the air leaks into the cool air flow and flows down the front of the case body 3a while maintaining the wind speed, this leak is caused. Flat air showcase 2
A cold air curtain A blown out from the rear in a substantially horizontal direction in the upper open area (lower) abuts almost at a right angle to interfere with the air curtain A, whereby the laminar flow of the cool air curtain A is disturbed and the air curtain characteristics deteriorate. In this case, the degree of interference with the cool air curtain A increases as the wind speed of the leaking cool air flow from the cool air curtain B increases.

Therefore, in the configuration of the first embodiment, the cool air curtain B that blows out to the front of the open showcase 3
Therefore, it is necessary to take care that the wind speed of the cold air curtain B is kept low and interference of the cold air curtain B with the cold air curtain A due to leakage of the cold air curtain B is minimized. However, if the blowing air velocity of the cool air curtain B is suppressed to a low level, on the other hand, the amount of cool air circulating in the refrigerator is reduced, and the heat shielding performance of the cool air curtain B is also reduced, thereby deteriorating the cooling performance of the open showcase 3. Such a problem arises. The above is confirmed from the result of an evaluation test performed by the inventors on a prototype of a dual type showcase actually manufactured.

In order to solve such a problem, in the second embodiment, as shown in FIGS. 2 (a) and 2 (b), a rear panel 3f on the inner side of the cabinet in the open showcase 3 (upper stage) is provided. A cold air blowout hole 3g which is distributed in the upper and lower parts of the product display shelf 3e and punched in the left-right direction is opened. The cool air outlet 3g communicates with the cool air circulation path (the discharge side of the fan 3b) on the back side of the rear panel 3f, and when the cool operation of the open showcase 3 is performed, a part of the circulating cool air flow is applied to the cool air outlet. Through 3g, the air blows forward toward the inside of the refrigerator (the cool air blowing flow is indicated by arrow C).

Thus, the leaked cold airflow of the cold air curtain B blown out from above in the front open area of the open showcase 3 can flow down in the vertical direction under the influence of the cold air blowout flow C into the above-described storage. Instead, it turns diagonally forward. Therefore, the cold air leaking from the open showcase 3 collides with the laminar flow of the cool air curtain A which blows out from the rear to the front in the substantially horizontal direction toward the open upper surface of the lower flat showcase 2 from the vertical direction. Strong interference does not occur, whereby the laminar turbulence of the cool air curtain A is suppressed to a minimum, and a decrease in the coolness performance of the flat showcase 2 can be prevented. Further, with respect to the open showcase 3, even if the blowing air velocity of the cool air curtain B is slightly lower, the amount of cool air circulating in the entire refrigerator including the amount of cool air blown from the rear panel is sufficiently secured. Cold insulation performance can be maintained.

In this embodiment, as for the temperature control of the showcase, similarly to the first embodiment, the operating temperatures of the flat showcase 2 and the open showcase 3 are individually set to control the operation, and the temperature of one unit is controlled. The dual-type showcase will display and sell frozen and refrigerated products. In this embodiment, as shown in FIG. 2 (b), a thermometer 8 for individually displaying the internal temperature of the open showcase 3 and the internal temperature of the flat type showcase 2 is provided on the front upper part of the open showcase 3. It has.

[0019]

As described above, according to the dual-type freezer and refrigerated showcase of the present invention, an open showcase is stacked on a flat showcase to form a three-dimensional structure. Many products can be displayed and sold by effectively utilizing the space, and since there is no door on the front of the showcase unlike the reach-in type showcase, it is easy to put products in and out and select products. In addition, since the operating temperature of the open showcase and the flat type showcase are individually set to control the temperature, the combination of freezing / refrigeration and the operating temperature can be freely set between the upper and lower cases, and the frozen product, Display and sell refrigerated goods.

In addition, by adopting the constitution of the second and third aspects, the lower open side showcase is formed by the leakage of the cool air curtain from the open showcase and the cool airflow while securing the high cooling performance in the upper open side showcase. Interference with the cool air curtain blown out on the upper surface of the showcase (laminar flow disturbance of the air curtain) can be suppressed to a low level.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a dual-type refrigerated showcase corresponding to a first embodiment of the present invention, wherein (a) is a longitudinal side view of the showcase, and (b) is a refrigeration circuit diagram thereof.

FIGS. 2A and 2B are configuration diagrams of a dual-type refrigerated showcase corresponding to Embodiment 2 of the present invention, wherein FIG. 2A is a longitudinal side view of the showcase, and FIG.

FIG. 3 is a cross-sectional view of the configuration of a conventional reach-in type frozen showcase in which a reach-in type showcase and a flat type showcase are combined in upper and lower stages.

[Explanation of symbols]

 2 Flat showcase 2a Case body 2b Cool air circulation duct 2c Cooler 2d Fan 3 Open showcase 3a Case body 3b Cool air circulation duct 3c Cooler 3d Fan 3e Product display shelf 3f Back panel 3g Cold air blowout holes 4a, 4b Temperature sensor 5 Freezing Condensing unit 6 Temperature controller A Cold air curtain of flat showcase B Cold air curtain of open showcase C Cold airflow blown out of open showcase

Claims (3)

[Claims] 1. A cold air circulation type open showcase in which a cold air curtain is blown out from above in an open front area of a case body, and a cool air circulation type open showcase in which a cool air curtain is blown out from behind in an upper open area of the case body. A dual type, in which the flat showcase is combined with the upper and lower tiers, and the inside temperature of the open showcase and the flat showcase is set to different operating temperatures and the inside temperature is individually controlled. Type refrigerated showcase. 2. A cold air blow-out hole for blowing a part of a circulating cold air flow from a middle of a cool air circulation path toward a front side of the inside of a cold air circulation path on an inner back panel of an open show case arranged in an upper stage side in the show case according to claim 1. A dual type refrigerated showcase characterized by an opening. 3. A dual-type freezing and refrigeration show according to claim 2, wherein the cool air blow-out holes are distributed above and below the product display shelves arranged in the refrigerator and open in the left-right direction. Case.