JP2002221382A - Operation method for refrigerating open-showcase covered with night cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an operation method for a refrigerating open-showcase covered with a night cover, in which energy saving, the original object for covering the open showcase with a night-cover is made effective, in which three-layer air-curtain of a freeze air-curtain, a cold air-curtain, and a guard air-curtain are formed on the opening of the open case. SOLUTION: In the refrigerating open showcase, a night-cover 22 is provided, which can be drawn freely over the guard air-curtain 19 in the outside of the showcase. During the time when the night-cover 22 is drawn, driving of a fan 16 for blowing out guard-air to the opening 2 is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for operating a refrigerator-freezer open showcase having a night cover when the night cover is attached.

[0002]

2. Description of the Related Art In a freezing and refrigerated open showcase, for example, a showcase for displaying frozen foods and the like is required to maintain the temperature in a storage at −20 ° C. to 18 ° C.
As is well known, for example, as shown in FIG. 5, the inside of a showcase main body 1 having an opening 2 for entering and exiting a product and formed of a heat insulating wall is partitioned by a duct plate 3 to form a product storage 4 and a cool air circulation duct. 5, the inside of the cool air circulation duct 5 is further partitioned by a partition plate 6 made of a heat insulating wall, and a freeze air circulation duct 5a inside the refrigerator in which a cooler 7 is disposed and a cold air circulation duct 5b outside the refrigerator. The upper ends of the freeze air circulation duct 5a and the cold air circulation duct 5b are respectively connected to the freeze air and cold air outlets 8,9.
Then, the lower end is formed in each of the suction ports 10 and 11, and the opening 2 is sequentially closed by the freeze air curtain 12 and the cold air curtain 13 from the inside.

[0003] In the drawings, reference numerals 14 and 15 denote fans disposed on the respective suction ports 10 and 11 sides of the freeze air circulation duct 5a and the cold air circulation duct 5b.

[0004] A guard air duct 17 provided with a fan 16 for sucking outside air is provided outside the upper part of the showcase body 1, and the air outlet 1 at the tip of the guard air duct 17 is provided.
8 is opened to the outside of the outlet 9 of the cold air circulation duct 5b, and a guard air curtain 19 is formed further outside the cold air curtain 13.

[0005] In the figure, reference numeral 20 denotes a guard air duct 17 which is disposed outside the outlet of the air outlet 18 at the end of the guard air duct 17 so that the inside of the outlet and the opening 2 are provided.
Illumination lamps such as fluorescent lamps for irradiating the display 21 indicate a display shelf installed in the storage.

As described above, the freezing air curtain 12, the cold air curtain 13 and the guard air curtain 19 are formed in the opening 2 in three layers from the inside of the refrigerator in parallel, and are formed by the most cooled air passing through the cooler 7. The inside of the refrigerator is cooled by the freeze air curtain 12, a cold air curtain 13 is formed outside the cold air curtain 13 to protect the freeze air curtain 12, and a guard air curtain 19 formed by the outside air is formed outside the cold air curtain 19. The curtain 13 is protected.

[0007] In such a freezer and refrigerated open showcase, when a store such as a supermarket is not used at night or on holidays, the opening 2 is covered with a night cover 22 in order to keep the inside of the refrigerator cool and reduce the freezing capacity to save energy.
Cover with. When the night cover 22 is not used, the night cover 22 is wound and housed in the housing portion 23 with the upper end fixed to the outside of the warehouse above the lighting lamp 20 when the night cover 22 is not used. At the time of use, it is pulled out downward, the lower end is hooked on the suction port 11 and fixed, and the opening 2 is closed.

[0008]

Even at night or the like when the opening 2 is closed by the night cover 22, the fans 14, 1 can be used.
5 and 16 continue to operate, and a guard air curtain 19, a cold air curtain 13 and a freeze air curtain 12 are formed in the opening 2 in parallel with the inside of the night cover 22.

For this reason, even if the opening 2 is closed by the night cover 22 for the purpose of energy saving, a guard air curtain 19 is formed inside the night cover 22 so that outside air is taken in. However, outside air may be trapped in the storage, making it difficult to save energy, and there is a possibility that the substantial meaning of providing the night cover may be lost.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to provide a three-layer air curtain of a freeze air curtain, a cold air curtain and a guard air curtain at an opening, in a refrigerated refrigeration oven showcase. It is an object of the present invention to provide a method for operating a freezer and refrigerated open showcase when the night cover is attached, which can effectively save energy, which is the original purpose of attaching the night cover when the opening is closed.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention firstly stores goods by partitioning the inside of a showcase body formed of a heat insulating wall and having a front opening for taking in and out goods with a duct plate. The cold air circulation duct is formed into a refrigerator and a cold air circulation duct, and the inside of the cold air circulation duct is partitioned by a partition plate to form a freeze air circulation duct and a cold air circulation duct, and upper ends of the freeze air circulation duct and the cold air circulation duct are respectively formed. The lower end is formed at the inlet of the freeze air and the cold air, the lower end is formed at the inlet, the opening is sequentially closed from the inside with the freeze air curtain and the cold air curtain, and the outside air outlet is provided outside the cold air outlet. A refrigerated open showcase provided with a guard air curtain formed by outside air outside the cold air curtain. Lead freely mounted night cover to compartment outside the curtain, while the night cover is pulled out, it is an Abstract to stop the driving of the fan for blowing Gadoea the opening.

Thus, while the night cover is pulled out, the guard air is not blown out to the opening.
No guard air curtain is formed inside the storage of the night cover, so that outside air is not taken into the storage, so that energy saving at night or the like can be made effective.

Second, the inside of a showcase body formed of a heat insulating wall and having an opening for taking in and out of goods on the front surface is partitioned by a duct plate to form a product storage and a cool air circulation duct. Divided by a partition plate and formed into a freeze air circulation duct and a cold air circulation duct, the upper ends of the freeze air circulation duct and the cold air circulation duct are formed at the outlet of the freeze air and the cold air, respectively, and the lower end is formed at the suction port. Then, the opening is sequentially closed from the inside with a freeze air curtain and a cold air curtain, an outside air outlet is provided outside the cold air outlet, and a guard air curtain by outside air is provided outside the cold air curtain. In the formed refrigerated open showcase, it can be drawn out between the guard air curtain and the cold air curtain It is an summarized in that mounted night cover.

Thus, since the night cover is drawn out to the inside of the guard air curtain, even if the operation of the fan for blowing out the guard air is continued even at night or the like to form the guard air curtain, the guard air curtain remains in the night cover. The inside of the warehouse is not affected by guard air. Therefore, energy saving when the night cover is attached can be made effective.

Third, when the night cover is detachably mounted between the guard air curtain and the cold air curtain, the night cover is housed below the opening to be pulled out upward. The cold air curtain can be formed just outside the guard air curtain as before, without having to provide a storage section for the night cover which requires space by being located between the respective air outlets of the air curtain and the cold air curtain. . In addition, since the guard air curtain has no suction port, a storage portion for the night cover can be provided at an arbitrary position below the opening portion outside the cold air curtain.

Fourth, even when the night cover is attached between the guard air curtain and the cold air curtain so as to be freely drawn out, the fan for blowing out the guard air into the opening while the night cover is being drawn is driven. By stopping, power can be saved.

Fifth, when the night cover is attached between the guard air curtain and the cold air curtain so as to be freely drawn out, the drive of the fan for blowing out the guard air into the opening is stopped even while the night cover is being drawn out. By not doing so, a guard air curtain is formed outside the storage of the night cover. Therefore, dew condensation on the night cover can be prevented.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional side view of a showcase showing a first embodiment of an operation method of a refrigerated open showcase when a night cover is attached according to the present invention, and the entire configuration of the refrigerated open showcase has already been described with reference to FIG. Therefore, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted.

The refrigerator-freezer open showcase in which the method of the present invention is carried out also has a showcase body 1 as shown in FIG.
The interior is partitioned by a duct plate 3 and formed into a product storage 4 and a cool air circulation duct 5, and the inside of the cool air circulation duct 5 is further partitioned by a partition plate 6 made of a heat insulating wall, and a freeze air circulation duct 5a inside the warehouse is formed. And the cold air circulation duct 5b on the outside of the refrigerator.

The upper ends of the freeze air circulation duct 5a and the cold air circulation duct 5b are respectively connected to freeze air and cold air outlets 8 and 9, and the lower ends thereof are suction ports 10 and 1 respectively.
1 respectively. Further, a guard air duct 17 provided with a fan 16 for sucking in outside air is provided on the upper outer side of the showcase main body 1, and the outlet 18 at the tip of the guard air duct 17 is provided outside the outlet of the outlet 9 of the cold air circulation duct 5b. Open.

In the figure, reference numerals 14 and 15 denote fans disposed on the respective suction ports 10 and 11 sides of the freeze air circulation duct 5a and the cold air circulation duct 5b.

As described above, the freezing air curtain 12, the cold air curtain 13, and the guard air curtain 19 are formed in the opening 2 in three layers from the inside of the refrigerator in parallel, and are formed by the most cooled cold air passing through the cooler 7. The inside of the refrigerator is cooled by the freeze air curtain 12, a cold air curtain 13 is formed outside the cold air curtain 13 to protect the freeze air curtain 12, and a guard air curtain 19 formed by the outside air is formed outside the cold air curtain 19. The curtain 13 is protected.

In such a freezer and refrigerated open showcase, when a store such as a supermarket is not in use at night or on holidays, the opening 2 is covered with a night cover 22 in order to keep the inside of the refrigerator cool and reduce the freezing capacity to save energy.
Cover with. The night cover 22 is made of a film or cloth, and is wound around the storage portion 23 with the upper end fixed to the outside of the storage above the illumination lamp 20 when the night cover 22 is not used as shown in FIG. As shown in FIG. 1, as shown in FIG. 1, at the time of use such as at night or on holidays, it is pulled downward, the lower end is hooked and fixed to the suction port 11, and the opening 2 is closed.

When the opening 2 is closed by the night cover 22, the outlet 18 of the guard air curtain 19 is located inside the compartment of the night cover 22, but while the night cover 22 is being pulled out, the guard air curtain 19 is closed. The operation of the fan 16 for blowing out the outside air is stopped.

Therefore, when the night cover 22 is mounted, the guard air curtain 19 is not formed inside the night cover 22, so that outside air is not taken into the refrigerator, and energy can be saved.

As means for stopping the fan 16 when the night cover 22 is mounted, various means can be considered. For example, as shown in FIG. 1, a manual motor for turning on and off the drive motor of the fan 16 as shown in FIG. A switch 24 is separately provided, and when the night cover 22 is pulled out, the switch 24 is manually turned off at the same time.

As other means, since the lamp 20 is always turned off at night, a switch for turning the lamp 20 on and off in conjunction with the turning on and off of the lamp 20 is connected to a drive motor of the fan 16 and a night cover. A drawer sensor is provided to detect when the drawer 22 is pulled down or when the drawer 22 is hooked on the lower suction port 11, and the output from the sensor turns on and off the drive motor of the fan 16 in conjunction with the drawer sensor. There are various ways to do this.

FIGS. 3 and 4 show a second embodiment, in which the storage portion 23 of the night cover 22 is disposed at the bottom of the front side of the showcase body 1 below the opening 2 and the night cover 22 is provided.
Is formed so as to be drawn upward, and the leading end of the drawer is hung between the cold air outlet 9 and the guard air outlet 18 so that the space between the guard air curtain 19 and the cold air curtain 13 is formed. The night cover 22 was attached so as to be freely drawn out.

In this case, even if the air outlets 18, 9 of the guard air curtain 19 and the cold air curtain 13 are adjacent to each other, the hook of the night cover 22 is, for example, a hook for hooking the leading end. Since it is only necessary to attach a locking member such as the outside of the duct of the outlet 9,
Can be attached to a small part.

Thus, the night cover 2 can be used at night or the like.
The guard air curtain 19 and the cold air can be pulled out by pulling out the upper part 2 from the storage part 23 at the lower part of the showcase body 1 and hooking the tip to a hook provided outside the duct of the outlet 9 of the cold air curtain 13. The night cover 22 is drawn out with the curtain 13.

Therefore, the night cover 22 is drawn out to the inside of the guard air curtain 19, and even if the operation of the fan 16 for blowing out the guard air is continued even at night or the like to form the guard air curtain 19, the guard air curtain 19 is formed. The air curtain 19 is blocked by the night cover 22 located inside the refrigerator, and the interior of the refrigerator is not affected by the guard air. Therefore, energy saving when the night cover is attached can be made effective.

By forming the guard air curtain 19 outside the night cover 22, dew condensation caused by a temperature difference between the inside and outside of the night cover 22 can be prevented.

Further, the drive of the fan 16 for blowing out guard air can be stopped during the night when the night cover 22 is pulled out as described above. In such a case, power can be saved.

[0034]

As described above, the operation method of the present invention when the night cover is attached to the refrigerated open showcase is as follows.
First, the inside of a showcase body formed of a heat insulating wall and having an opening for taking in and out of goods at the front is partitioned by a duct plate to form a product storage and a cool air circulation duct, and the inside of the cool air circulation duct is partitioned by a partition plate. Sectioning and forming a frozen air circulation duct and a cold air circulation duct, the upper ends of the freeze air circulation duct and the cold air circulation duct are respectively formed at the outlets of the freeze air and the cold air, and the lower ends are formed at the suction port, Refrigeration in which the opening is sequentially closed from the inside with a freeze air curtain and a cold air curtain, an outside air outlet is provided outside the cold air outlet, and a guard air curtain is formed outside the cold air curtain by outside air. In the refrigerated open showcase, a night cover is attached to the outside of the guard air curtain so that it can be pulled out. While over is drawn out are those summarized in that stops the driving of the fan for blowing Gadoea the opening.

As a result, while the night cover is being pulled out, the guard air is not blown out to the opening.
No guard air curtain is formed inside the storage of the night cover, so that outside air is not taken into the storage, and energy saving at night or the like can be made effective.

Second, the inside of the showcase body formed of a heat insulating wall and having an opening for taking in and out of goods on the front surface is partitioned by a duct plate to form a goods storage and a cool air circulation duct. Divided by a partition plate and formed into a freeze air circulation duct and a cold air circulation duct, the upper ends of the freeze air circulation duct and the cold air circulation duct are formed at the outlet of the freeze air and the cold air, respectively, and the lower end is formed at the suction port. Then, the opening is sequentially closed from the inside with a freeze air curtain and a cold air curtain, an outside air outlet is provided outside the cold air outlet, and a guard air curtain by outside air is provided outside the cold air curtain. In the formed refrigerated open showcase, it can be drawn out between the guard air curtain and the cold air curtain It is an summarized in that mounted night cover.

As a result, since the night cover is drawn out to the inside of the guard air curtain, even if the operation of the fan for blowing out the guard air is continued even at night or the like to form the guard air curtain, the guard air curtain remains in the night cover. The inside of the warehouse is not affected by guard air. Therefore, energy saving when the night cover is attached can be made effective.

Third, when the night cover is detachably mounted between the guard air curtain and the cold air curtain, the night cover is housed below the opening to be pulled out upward. The cold air curtain can be formed just outside the guard air curtain as before, without having to provide a storage section for the night cover which requires space by being located between the respective air outlets of the air curtain and the cold air curtain. . In addition, since the guard air curtain has no suction port, a storage portion for the night cover can be provided at an arbitrary position below the opening on the outside of the cold air curtain.

Fourth, even when a night cover is attached between the guard air curtain and the cold air curtain so as to be freely drawn out, the fan for blowing guard air into the opening is driven while the night cover is pulled out. By stopping, power can be saved.

Fifth, when a night cover is attached between the guard air curtain and the cold air curtain so as to be freely drawn out, the drive of the fan for blowing out the guard air into the opening is stopped even while the night cover is being drawn out. By not doing so, a guard air curtain is formed outside the storage of the night cover. Therefore, dew condensation on the night cover can be prevented.

[Brief description of the drawings]

FIG. 1 is a first driving method when a night cover is attached according to the present invention.
It is a vertical side view of the freezer refrigeration open showcase in which an embodiment is carried out.

FIG. 2 is a first driving method when a night cover is attached according to the present invention;
It is a vertical side view of the upper part of the showcase which is the principal part of the freezer / refrigeration open showcase in which the embodiment is implemented.

FIG. 3 is a second driving method when a night cover is attached according to the present invention;
It is a vertical side view of the lower part of the showcase which is the principal part of the freezing and refrigeration open showcase in which the embodiment is implemented.

FIG. 4 is a second driving method when the night cover is attached according to the present invention.
It is a vertical side view of the freezer refrigeration open showcase in which an embodiment is carried out.

FIG. 5 is a vertical side view of a freezer-refrigerated open showcase in which a conventional operation method when a night cover is attached is performed.

[Explanation of symbols]

1. Showcase body 2. Opening
3 ... duct 4 ... goods storage 5 ... cool air circulation duct 5a ... freeze air circulation duct 5b ... cold air circulation duct 6 ... partition plate 7 ... cooler
8 ... Outlet 9 ... Outlet 10 ... Suction port
11 ... Suction port 12 ... Freeze air curtain 13 ... Cold air curtain 14 ... Fan 15 ... Fan
16 Fan 17 Guard air duct 18 Air outlet 19 Guard air curtain 20 Illumination lamp
21 ... display shelf 22 ... night cover 23 ... storage section
24 ... Switch

Claims (5)

[Claims] The interior of a showcase body formed of a heat insulating wall and having an opening for taking in and out of goods on the front surface is partitioned by a duct plate to form a product storage and a cool air circulation duct, and the inside of the cool air circulation duct is partitioned by a partition plate. Formed into a frozen air circulation duct and a cold air circulation duct, and the upper ends of the freeze air circulation duct and the cold air circulation duct are respectively formed at the outlet of the freeze air and the cold air, and the lower end is formed at the suction port, The opening was sequentially closed from the inside with a freeze air curtain and a cold air curtain, an outside air outlet was provided outside the cold air outlet, and a guard air curtain by outside air was formed outside the cold air curtain. In the refrigerated open showcase,
A night cover is attached to the outside of the guard air curtain so as to be able to be pulled out freely, and while the night cover is being pulled out, the drive of a fan for blowing guard air into the opening is stopped. Driving method when the night cover is attached to the case. 2. The interior of a showcase body formed of a heat insulating wall and having an opening for taking in and out of goods on the front surface is partitioned by a duct plate to form a product storage and a cool air circulation duct, and the inside of the cool air circulation duct is partitioned by the partition plate. Formed into a frozen air circulation duct and a cold air circulation duct, and the upper ends of the freeze air circulation duct and the cold air circulation duct are respectively formed at the outlet of the freeze air and the cold air, and the lower end is formed at the suction port, The opening was sequentially closed from the inside with a freeze air curtain and a cold air curtain, an outside air outlet was provided outside the cold air outlet, and a guard air curtain by outside air was formed outside the cold air curtain. In the refrigerated open showcase,
An operation method when a night cover is attached to a refrigerated open showcase, wherein a night cover is attached so as to be freely drawn out between the guard air curtain and the cold air curtain. 3. The night cover is housed below the opening and pulled out upward.
The operation method when the night cover is attached to the refrigerated open showcase described in the above. 4. The night of a refrigerated open showcase according to claim 2, wherein the drive of a fan for blowing guard air into the opening is stopped while the night cover is pulled out. Driving method with cover attached. 5. The night of a refrigerated open showcase according to claim 2, wherein the drive of the fan for blowing guard air into the opening is not stopped even while the night cover is pulled out. Driving method with cover attached.