JPH1033324A - Show case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent generation of dew at a part where dew generates and save energy in a show case cooling the inside of a storage chamber by providing a solar battery at the place where dew generates due to the cooling operation. SOLUTION: Under a condition where when a compressor of a refrigerator is operated to drive an air blower for cooling the inside of a storage chamber 19 there is no dew at a mirror positioned at a deep upper part of an upper shelf 31 and a solar cell 37, the cell 37 receives a maximum amount of light, and an electromotive force VS of the cell 37 becomes a maximum while the heat generation QH of an electric heater becomes 0. Along with the lapse of time, however, dew generating on the surfaces of the mirror 34 and the cell 37 interrupts incidence of light to the cell 37 to decrease the reception LX. It is required to increase the heating QH of the heater through a controller according to the decrease of electromotive force VS. Dew on the surface of the mirror 34 is thereby evaporated to eliminate fogging in the mirror 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a showcase formed by cooling a storage room.

[0002]

2. Description of the Related Art Conventionally, a showcase of this type has been installed in a store such as a supermarket, and is disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 6-277137 (A46F3 / 0).
As shown as an open showcase in 4), a plurality of shelves are installed in a storage room with a front opening, and products such as food are displayed on each shelf. Then, cool air from the cooler of the cooling device is circulated in the storage room, and an air curtain is formed at the opening to cool the storage room.

[0003] A fluorescent lamp for lighting is mounted on the top of the storage room or on the lower surface of the shelf, and a mirror is mounted on the upper part of the storage room at an angle to incline the products on the lower shelf for sale. A configuration that improves the effect was adopted.

On the other hand, since the cool air is circulated in the storage room as described above, the mirror and the inner wall of the storage room are also cooled. As a result, the moisture in the outside air that has entered through the opening forms dew and condenses on these, fogging the mirror, and the dew that adheres to the top surface of the storage room drops on the lower shelf and degrades the product. There was a problem.

Therefore, in this type of showcase, as described in the above-mentioned publication, measures have been taken such as mounting an electric heater on a mirror to generate heat and remove fogging.

[0006]

The condensation or fogging of the mirror occurs when the cooling device is stopped, that is, at the time of so-called thermo-off or when the cooler is defrosted. The electric heater is continuously energized, wasteful power is consumed, and the heat load in the storage room is increased to lower the cooling capacity.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problems, and it is an object of the present invention to provide a showcase in which dew condensation can be effectively eliminated at a location where dew condensation occurs and energy is saved. Aim.

[0008]

That is, a showcase according to the first aspect of the present invention is a showcase in which a storage chamber is cooled, and a solar cell is provided at a location where dew condensation occurs due to cooling.

[0009] The showcase according to the second aspect of the present invention comprises:
The storage room is cooled and a mirror is mounted in the storage room. A solar cell is provided at a position for receiving light incident on the mirror.

Further, in the showcase according to the third aspect of the present invention, an electric heater is provided at the dew condensation occurrence point or the mirror, and the amount of heat generated by the electric heater is controlled based on the electromotive force of the solar cell. .

The showcase of the invention according to claim 4 is:
It comprises a fluorescent lamp for cooling the storage room and illuminating the storage room.A mirror is provided in the storage room, and a fluorescent lamp stabilizer is provided behind the mirror. It is a thing.

[0012]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a showcase 10 of the present invention, FIG. 2 is a vertical side view of the showcase 10 of the present invention, FIG. 3 is a perspective view of a mirror 34 having a solar cell 37 attached to the front, and FIG. FIG. 5 is a perspective view of a mirror 34 to which a battery 37 is attached, and FIG.
FIG. 6 is a diagram showing a relationship between the heat generation amount QH of the electric heater 35 and the electric heater 35.

The showcase 10 is, for example, a vertical frozen / refrigerated type open showcase which is installed in a store such as a supermarket, and includes a heat insulating wall 12 having a substantially U-shaped cross section and a heat insulating wall 12 at the installation site. It is composed of side plates 13 attached to both sides, and side plates 13. Partition plates 14 and 15 are provided inside the heat insulating wall 12.
The inner duct 16 is provided between the inner partition plate 14 and the outer partition plate 15, and the outer duct 17 is provided between the outer partition plate 15 and the heat insulating wall 12.

The back partition plate 1 constituting the inner partition plate 14
In front of the lower end of 4A, a bottom plate 18 called a deck pan is attached to the bottom wall 12A of the heat insulating wall 12 with a space for a duct, and these partition plate 14 and bottom plate 18 are provided.
Is the storage room 19. At the upper edge of the front opening 20 of the heat insulating wall 12, an inner layer discharge port 23 and an outer layer discharge port 24 to which honeycomb materials 21 and 22 are respectively attached are arranged side by side. These inner layer discharge port 23 and outer layer discharge port 24 are
It communicates with the inner duct 16 and the outer duct 17 respectively. At the lower edge of the front opening 20 of the heat insulating wall 12, an inner layer suction port 25 and an outer layer suction port 26 are juxtaposed, and a plurality of slits (not shown) are formed in both the suction ports 25 and 26. Suction cover 27 is provided.

On the other hand, a fan case 28 is provided below the bottom plate 18 on the bottom wall 12A of the heat insulating wall 12, and the fan case 28 has the inner duct 16 and the outer duct 1
7, a plurality of blowers (not shown) are attached.
The space below the bottom plate 18 is divided into two upper and lower ducts by a partition member 29. The inner layer suction port 25 is connected to the inner layer duct 16 via an inner layer blower, and the outer layer suction port 26 is connected to an outer layer blower. The outer layer duct 17 communicates with the outer layer duct 17.

A cooler 30 constituting a cooling device is provided vertically in the inner duct 16 behind the back partition plate 14A.
When the inner layer blower is operated, the cool air that has exchanged heat with the cooler 30 is raised in the inner layer duct 16 and is discharged from the inner layer outlet 23 toward the inner layer inlet 25. Then, the cool air sucked from the inner layer suction port 25 is again accelerated by the blower, and circulates to exchange heat with the cooler 30.

When the outer layer blower is operated, the air in the outer layer duct 17 is raised, and is discharged from the outer layer discharge port 24 toward the outer layer suction port 26. Then, the air sucked from the outer layer suction port 26 is again accelerated by the blower. Thereby, a double air curtain is formed at the front opening 20 of the storage room 19 to cool the inside of the storage room 19.

A plurality of commodity display shelves 31... Are provided at predetermined intervals in the storage room 19. This shelf 31
.. Are arranged such that the front and rear widths of the shelves 31... Are larger toward the lower side than the upper ones, so that the products on the respective shelves 31. Also, a back partition plate 14A and a top partition plate 14B constituting the inner partition plate 14 are formed.
A mirror 34 in the shape of a horizontally long rectangular plate is removably attached to the corners formed by the upper and lower parts, and is inclined above the innermost part of the uppermost shelf 31.

The mirror 34 is mounted so as to project a product displayed on the uppermost shelf 31 so as to be easily seen by customers, thereby improving the sales of the product. The mirror 34 is formed by fixing a reflecting member (in this case, silver or the like that efficiently reflects light) that reflects light to the back side surface of a plate glass by vapor deposition or the like. Reference numeral 32 denotes a fluorescent lamp mounted on the top partition plate 14B, the shelf 31,..., And the inner surface of the eaves 33, which will be described later, and stores products displayed in the storage room 19 and on each shelf 31. It illuminates brightly. And 33 is an eave, 3
9 is a ballast 39 for lighting the fluorescent lamps 32.
A raceway 4 where wiring cables are usually stored
The number of fluorescent lamps 32...

The mirror 34 is provided with a solar cell 37 called a solar cell. This solar cell 37
Is affixed to the front surface such as the upper right corner which does not hinder product projection with an adhesive (not shown) or the like. That is, the solar cell 3
Reference numeral 7 is attached to a position for receiving light (light from the fluorescent lamp 32 or light from the outside) incident on the mirror 34.

The solar cell 37 converts light into electric energy to generate an electromotive force. That is, the solar cell 37 has a property of conducting electricity at normal temperature and is made of a semiconductor (germanium or silicon) or the like which is intermediate between a conductor and a nonconductor, and is configured to generate received light energy to convert it into electric power. I have. The solar cell 37 has a large electromotive force when the amount of received light is large, and has a small electromotive force when the amount of received light is small. This is shown in the upper part of FIG. In this case, the horizontal axis LX indicates the amount of light received by the solar cell 37, and the vertical axis VS indicates the electromotive force of the solar cell 37.
The electromotive force VS increases in proportion to the increase.

Two battery lead wires 38, 38 are connected to the solar cell 37 by wiring, and the battery lead wires 38, 38 are connected to a controller (not shown).
An electric heater 35 is attached to the back side of the mirror 34 in close contact therewith. The electric heater 35 is made of nickel, chrome,
It is made of an iron alloy nichrome wire or the like, and is closely attached to the rear surface of the mirror 34 in a meandering state. At both ends of the electric heater 35, a heater lead wire 3 is provided.
6 and 36 are connected by wiring.
The electric heater 35 generates heat by applying a voltage to 6,6.

FIG. 5 shows the control of the amount of heat generated by the electric heater 35 by the control device. The control device calculates the heat value Q of the electric heater 35 according to the electromotive force VS of the solar cell 37.
H is adjusted as shown in FIG. In this case, the lower horizontal axis of FIG. 5 shows the received light amount LX, and the vertical axis shows the heat generation amount QH.

That is, the control device determines the electromotive force V of the solar cell 37.
Based on S, the heat generation amount QH is set to 0 when the received light amount LX is from 0 to a predetermined value. Then, the heat value QH is set to the maximum value from the predetermined value. Thereafter, the heat generation amount QH is maintained at the maximum value until the received light amount LX rises to a predetermined value.
The heat value QH is reduced in inverse proportion to the increase of X, and finally the heat value QH is set to zero.

With the above configuration, the showcase 1 of the present invention will be described next.
The operation of 0 will be described. When the compressor of the refrigerator (not shown) constituting the cooling device is operated and the blower is driven, the inside of the storage room 19 is cooled as described above. While the store is open, the employee turns on the fluorescent lamp 32. The operation of the compressor is ON-OFF by the control device based on the temperature in the storage room 19.
Controlled.

In this case, there is no dew condensation on the mirror 34 and the solar cell 37 provided at the upper part of the upper shelf 31 and the solar cell 37
In the situation where the light incident on the solar cell is not blocked, the solar cell 3
7 receives the maximum amount of light. As a result, the electromotive force VS of the solar cell 37 becomes the maximum value, and the calorific value QH of the electric heater 35 is set to zero.

As the mirror 34 and the solar cell 37 are cooled, the moisture of the food displayed on each of the shelves 31... In addition, condensation occurs on the surface of the solar cell 37 and dew forms, so that the mirror 34 becomes cloudy. At this time, since the light incident on the solar cell 37 is also blocked by the condensation, the amount of received light L
X goes down.

As the amount of received light LX of the solar cell 37 decreases, the control device increases the amount of heat QH of the electric heater 35 based on the decrease of the electromotive force VS as described above. As a result, the dew condensation adhering to the surface of the mirror 34 is evaporated, so that the fogging of the mirror 34 is removed.

Since the dew condensation on the solar cell 37 is eliminated by the heat generated by the electric heater 35, the received light amount LX of the solar cell 37 also increases. In response, the control device reduces the heat value QH of the electric heater 35, and sets the heat value QH to 0 when all the fogging is eliminated. Then, when fogging occurs again, the control device increases the heat generation amount QH of the electric heater 35 again.

As described above, in the present invention, since the solar cell 37 is provided on the mirror 34, the control device can be easily controlled by the electromotive force according to the state of increase or decrease of the dew condensation on the surface of the mirror 34 (solar cell 37). This makes it possible to detect the dew condensation state on the mirror surface.

When the humidity is low and there is no condensation on the surface of the mirror 34, no electric power is supplied to the electric heater 35. When the condensation on the mirror 34 is small, a small amount of electric power is supplied to the electric heater 35 to reduce the condensation on the mirror 34. In addition, when there is a large amount of dew such as when the defroster of the cooler 30 or when the compressor is stopped, a large amount of power is supplied to the electric heater 35 so that the dew condensation on the mirror 34 can be quickly eliminated. The surface can always maintain a dew-free state, and the electric heater 35 can generate heat only when the mirror 34 has condensed, and the amount of heat generated can be adjusted according to the amount of dew. Can be eliminated, and significant energy savings can be achieved. Unnecessary increase in the load in the storage room 19 is also prevented, and the cooling capacity is improved.

FIG. 4 illustrates another example of mounting the solar cell 37. In this case, the reflection member fixed to the back side of the mirror 34 is removed by the area of the solar cell 37 and the window 34A is removed.
Is provided. The solar cell 37 is fixed to the back surface of the mirror 34 with an adhesive corresponding to the window 34A. According to such a configuration, it is possible to prevent the inconvenience of the solar cell 37 being damaged by the contact of foreign matter, while ensuring the incidence of light on the solar cell 37.

FIG. 6 shows the structure of another showcase 1 of the present invention. In this figure, the same reference numerals as those in FIGS. 1 to 5 denote the same parts. In this case, mirror 3
A raceway 41 is provided at the back of the raceway 4, and a predetermined number of stabilizers 39 are attached to the raceway 41. In this case, the above-mentioned electric heater and solar cell are omitted. The number of the ballasts 39 is appropriately set according to the degree of elimination of fogging, which will be described later, within a range where the load in the storage room 19 does not increase so much.

According to such a configuration, during opening of a store in which the switch of the fluorescent lamp 32 is turned on, the ballast 39 is energized to generate heat, and the mirror 34 is heated from the back side by the heat generation. Such fogging due to condensation is eliminated.
This eliminates the need for the electric heater or the like for preventing dew condensation, so that it is possible to reduce the production cost by reducing the number of parts, and the fluorescent lamp 32 is turned off when the store is closed. , And the generation of unnecessary heat in the storage room 19 is also prevented. It should be noted that the fogging of the mirror 34 is not a problem during closing.

Since the mirror 34 is detachably mounted, it can be easily replaced even when the stabilizer 39 breaks down. Further, by not using an electric heater, accidents such as occurrence of electric shock / leakage and wrong wattage can be solved beforehand.

In the embodiment, the solar cell 37 is mounted on the mirror 34. However, the present invention is not limited to this, and the solar cell 37 and the electric heater 35 are mounted on a place such as the top partition plate 14B where dew condensation easily occurs. It is also effective to prevent condensation on them.

[0037]

As described above in detail, according to the first aspect of the present invention, in a showcase formed by cooling a storage room, a solar cell is provided at a location where dew condensation occurs due to cooling. The amount of light received by the solar cell decreases, and its electromotive force decreases. That is, the dew condensation state can be detected by the electromotive force of the solar cell.

Therefore, an electric heater is provided at the location as described above, and the amount of heat generated by the electric heater is controlled based on the electromotive force of the solar cell. Can be effectively eliminated.

In particular, due to the change in the electromotive force of the solar cell,
Since the amount of dew condensation can be continuously grasped, it is possible to realize more effective elimination of dew condensation and power saving by continuously adjusting the amount of heat generated by the electric heater according to the amount of dew condensation. It becomes.

According to the second aspect of the present invention, the storage room is cooled, and the solar cell is provided at a position for receiving the light incident on the mirror in the showcase having the mirror mounted in the storage room. As the condensation on the mirror surface increases, the amount of light received by the solar cell decreases, and the electromotive force decreases. That is, the dew condensation state of the mirror can be detected by the electromotive force of the solar cell.

Accordingly, the mirror is provided with an electric heater as described in claim 3, and the amount of heat generated by the electric heater is controlled based on the electromotive force of the solar cell, thereby conserving energy and reducing the condensation formed on the mirror. It can be effectively eliminated.

In particular, by the change in the electromotive force of the solar cell,
Since the amount of dew condensation can be continuously grasped, the amount of heat generated by the electric heater is continuously adjusted in accordance with the amount of dew condensation, so that more effective decondensing of the mirror and power saving can be realized. It becomes something.

According to the fourth aspect of the present invention, in a showcase provided with a fluorescent lamp for cooling the storage room and illuminating the storage room, a mirror is provided in the storage room, and a mirror is provided behind the mirror. , The fluorescent ballast is provided, so that the mirror can be heated by the heat generated by the ballast when the fluorescent lamp is turned on.

Accordingly, it is possible to effectively eliminate the fogging of the mirror surface, which is easily condensed by cooling, and to promote the sales effect during opening. In particular, since a special electric heater or the like for preventing dew condensation is not required, production costs can be reduced by reducing the number of components, and energy can be saved. In addition, electric shocks and electric leakage accidents caused by the electric heater are eliminated.

Furthermore, if the fluorescent lamp is turned off when the store is closed, heat generation from the ballast is also eliminated, so that an unnecessary increase in the heat load in the storage room is automatically prevented, and the mirror is made detachable. It also facilitates replacement work when a ballast fails.

[Brief description of the drawings]

FIG. 1 is a perspective view of a showcase of the present invention.

FIG. 2 is a vertical sectional side view of the showcase of the present invention.

FIG. 3 is a perspective view of a mirror having a solar cell attached to a front surface.

FIG. 4 is a perspective view of a mirror in which a solar cell is attached to a back surface.

FIG. 5 is a diagram showing the relationship between the amount of light received by a solar cell and the electromotive force, and the amount of heat generated by an electric heater.

FIG. 6 is an enlarged longitudinal sectional side view of a showcase in which a stabilizer is attached to the back of a mirror.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Showcase 12 Insulated wall 14 Divider 14A Back divider 14B Upper divider 19 Storage room 20 Opening 30 Cooler 31 Shelf 32 Fluorescent lamp 34 Mirror 34A Window 35 Electric heater 37 Solar cell 39 Stabilizer 41 Raceway LX VS electromotive force QH calorific value

Claims (4)

[Claims] 1. A showcase formed by cooling a storage room, wherein a solar cell is provided at a location where dew condensation occurs due to the cooling. 2. A showcase comprising a storage room cooled and a mirror mounted in the storage room, wherein a solar cell is provided at a position for receiving light incident on the mirror. 3. The show according to claim 1, wherein an electric heater is provided at a dew condensation occurrence point or a mirror, and a calorific value of the electric heater is controlled based on an electromotive force of a solar cell. Case. 4. A showcase comprising a fluorescent lamp for cooling the storage room and illuminating the storage room, wherein a mirror is provided in the storage room and the mirror is located behind the mirror. A showcase with a fluorescent light ballast.