JP2002168558A - Showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve assembly workability of a showcase having a cold temperature switching storage chamber where a cold temperature is usable in a switching manner. SOLUTION: The showcase is provided with a cold temperature switching storage chamber 12 which is situated in a heat insulation partition wall 2 opened to a front and usable in a manner that a cold temperature can be switched and the showcase comprises a heater situated in the cold temperature switching storage chamber, a through hole 61 formed in the back of a heat insulation wall, an electric accessory box 26 situated in a machine room 21 constituted below the heat insulation wall, a back plate 27 situated on the back side of the heat insulation wall with a space; and a duct 28 for exhaust formed between the back plate and the heat insulation wall and its lower end communicating with the machine room. An electric wire 62 from the heater is led out through a through-hole to the interior of the duct for exhaust and connected in a position above the through-hole to an electric wire 63 from the electric accessory box.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a showcase provided with a cold / hot changeable storage room which can be used for cold / hot change in a heat insulating wall.

[0002]

2. Description of the Related Art Conventionally, a show-case of this type is provided with a cool-temperature changeable storage room (cool-temperature change-over room) which can be used for cold-temperature change as disclosed in, for example, Japanese Patent Application Laid-Open No. 6-14827 (A47F3 / 04). Things are being developed. In such a showcase, for example, in the summer or the like, cool air is supplied to the cold / cold switching storage room to a refrigeration temperature, and products such as canned beverages are displayed while being refrigerated, and cold air to be supplied to the cold / cold switching storage room in winter is damped. In this case, the product is heated by heating the cold / cold switching storage room with an electric heater.

[0003]

By the way, the electric wires from the electric heater provided in the cold / hot changeover storage room are drawn out from the bottom of the heat insulating wall into the machine room below the heat insulating wall, and the electric wires from the electric box provided there. It was connected to the wires in the machine room. Therefore, it is necessary to route the electric wire from the electric heater for a long distance before passing it to the machine room, and to pass through the through holes at a plurality of locations. Was extremely bad.

Further, when the cold / hot changeover storage room is used in refrigeration, dew condensation adheres to the electric wire, and the dew water travels along the electric wire to reach a connection point with the electric wire from the electrical box, thereby causing a short-circuit failure. There were also problems.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problem, and it is an object of the present invention to improve the assembling workability of a showcase provided with a cold / hot switching storage room capable of cold / hot switching and to prevent a failure from occurring. The purpose is to aim.

[0006]

The showcase of the present invention comprises a cold / hot changeable storage room which can be used for cold / hot change in a heat insulating wall opened on the front surface, and is provided in the cold / hot changeable storage room. Heater, a through-hole formed on the back surface of the heat insulating wall, an electrical box provided in a machine room formed below the heat insulating wall, and an electric box provided behind the heat insulating wall with a space therebetween. A back plate, and an exhaust duct configured between the back plate and the heat insulating wall, and a lower end communicating with the machine room, and electrically connecting the wires from the heater to the exhaust duct through the through hole. And connected to an electric wire from the electrical box above the through hole.

According to the present invention, in a showcase having a cold / hot changeable storage room which can be used for cold / hot change in an insulated wall opened to the front, a heater provided in the cold / hot changeable storage room, A through hole formed in the back surface, an electrical box provided in a machine room formed below the heat insulating wall, a back plate provided at a rear rear side of the heat insulating wall with an interval, and An exhaust duct configured between the face plate and the heat insulating wall and having a lower end communicating with the machine room, drawing an electric wire from the heater out of the through hole into the exhaust duct, and Since the connection with the electric wire from the electrical box is made possible, the length of the electric wire from the heater provided in the cold / hot switching storage room can be shortened, and the preparation work becomes easy.

In addition, the number of assembling steps is reduced, workability is improved and the amount of dust and the like adhered to the connecting portion is reduced as compared with the case where the electric wires are connected to the electric box in a machine room or the like. In particular, since the electric wire from the heater is connected to the electric wire from the electrical box above the through-hole, when using the cold storage room in cold storage, dew condensation reaches the connecting part through the electric wire, causing a short-circuit failure. The danger of causing is eliminated.

A showcase according to a second aspect of the present invention is characterized in that an opening is formed in the back plate at a position corresponding to the through-hole in the above, and the cover is opened and closed with a lid.

According to the second aspect of the present invention, in addition to the above, an opening is formed in the back plate at a position corresponding to the through hole,
Since the lid is openably and closably closed by the lid, the electric wires of the heater and the electric wires from the electrical box can be attached and detached from this opening. This makes it possible to easily perform maintenance on the heater without removing the back plate.

According to a third aspect of the present invention, in the showcase of the first aspect, the electric wire is suspended in the exhaust duct by a hanger detachably engaged with an upper end opening of the exhaust duct. I do.

According to the third aspect of the present invention, the electric wire is suspended in the exhaust duct by the hanger detachably engaged with the upper end opening of the exhaust duct in the first aspect. By pulling the wires above the exhaust duct, it is possible to attach and detach the wires of the heater and the wires from the electrical box outside the exhaust duct. This makes it possible to easily perform maintenance on the heater without removing the back plate.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of an open showcase 1 as an example of a showcase of the present invention, and FIG.
Shows vertical side views of the open showcase 1, respectively. The open showcase 1 is configured by attaching glass side plates 3 on both sides of a heat insulating wall 2 having a substantially U-shaped cross section, thereby forming a main body 4 having an open front. A duct plate 6 extending from the bottom surface, the back surface, and the top surface is attached to the inside of the heat insulating wall 2 at intervals.
A main duct 7 is formed therebetween, and a storage room 8 having a front surface opened inside the duct plate 6 is formed.

The interior of the storage room 8 is vertically divided by a heat insulating partition member 11 attached to a substantially middle portion in the vertical direction. The lower part of the heat insulating partition member 11 is a cooling storage room 13 used for refrigeration. The upper end of the main duct 7 communicates with an upper cold air discharge port 14 located at the upper edge of the front opening of the cold / temperature switching storage chamber 12, and the lower end of the main duct 8 has the cold air inlet 16 located at the lower edge of the front opening of the cooling storage chamber 13. Is in communication with Also, the main duct 7 below the cooling storage room 13
A blower 17 for supplying cool air is disposed in the inside, and a cooler 18 constituting a refrigeration cycle of a cooling device is vertically provided in the main duct 7 behind the cooling storage room 13. Reference numeral 19 denotes a night cover for closing the opening of the storage room 8 when the store is closed, and is housed so as to be able to be pulled out below the cool air suction port 16. Reference numeral 9 denotes a fluorescent lamp mounted on the front side of the upper cool air discharge port 14.

A machine room 21 is formed below the heat insulating wall 2. In the machine room 21, a compressor 22 and a condenser 2 constituting a refrigerating cycle of a cooling device together with the cooler 18 are provided.
3. A condenser blower 24 is installed, and an electrical box 26 (see FIG. 11) containing a power supply and a control board is also provided. A rear plate 27 made of a steel plate is attached to the rear side of the heat insulating wall 2 at a predetermined interval from the rear surface of the heat insulating wall 2.
An exhaust duct 28 is formed between the back plate 27 and the heat insulating wall 2. The lower end of the exhaust duct 28 is
1 and communicate with each other, and the upper end is open above the open showcase 1. 29 is the machine room 2
1 is a panel that opens and closes the front surface of the panel 1 freely. Reference numeral 31 denotes an evaporating dish provided in the lower part of the machine room 21. Drain water (dew water, defrost water, etc.) from the cooler 18 flows in through a drain hose (not shown) and is stored. The evaporating dish 31 is provided with an evaporating dish heater H2 (electric heater; see FIG. 13).

In the cooling storage room 13, movable shelves 33, 33 which can be pulled out and moved in the front-rear direction are provided in two stages. A movable shelf 3 that can be pulled out and moved in the front-rear direction on and above the heat insulating partition member 11 in the cold / temperature switching storage room 12.
4 and 34 are erected, but in the case of the cold / hot change storage room 12, each of the movable shelves 34 and 34 is inclined slightly lower forward. Heating heaters H3 (electric heaters; see FIG. 13) are attached to the movable shelves 34, 34 on the back side of the product mounting surfaces. The movable shelf 3 in FIGS.
A heat buffer insole 35 made of a polycarbonate plate having a thickness of about 0.5 mm is detachably laid on 4, 4. When the interior of the cold / hot change storage room 12 is used for storage, the insole 35 places a product of a short, recapped resin bottle (such as a PET bottle) on the movable shelf 34 as shown in FIGS. 3 and 5 to 7. Used when displaying, and removed when displaying products such as canned beverages.

In this case, the height from the installation floor to the movable shelf 33 at the lower stage of the cooling storage room 13 is 400 mm to 450 mm.
(In the embodiment, 420 mm), and the upper movable shelf 3
The height up to 3 is 630 mm to 680 mm (6 mm in the embodiment).
50 mm). The lower movable shelf 34
870 mm to 920 mm (89 in the embodiment).
0 mm), and the frontage between the lower movable shelf 34 and the upper movable shelf 34 and the frontage between the upper movable shelf 34 and the upper cool air discharge port 14 are set to 170 mm to 190 mm.

A dew condensation preventing heater H1 (electric heater; see FIG. 13) for preventing dew condensation is attached to the front opening edge of the storage room 8 at a position corresponding to the cooling storage room 13 to prevent dew condensation. A dew condensation preventing heater H4 (electric heater; see FIG. 13) for the cold / hot switching storage room for preventing dew condensation during refrigeration is also attached to the front opening edge of the storage room 8 at a position corresponding to the switching storage room 12. I have.

On the other hand, a partition plate 36 made of a steel plate is attached at a predetermined interval below the heat insulating partition member 11, and a branch duct 37 is formed between the partition plate 36 and the heat insulating partition member 11. . Between the front end of the heat insulating partition member 11 and the front end of the partition plate 36, a lower cold air discharge port 38 opening at the front end of the branch duct 37 is formed. The front end of the heat insulating partition member 11 and the front end of the partition plate 36 are shown in FIG. Due to the downward bending, the lower cool air discharge port 38 is directed obliquely forward and downward. The rear end of the branch duct 37 communicates with the main duct 7 through a through hole formed in the rear duct plate 6.
Note that a plurality of rear cold air discharge ports 40 are formed in the duct plate 6 at a position corresponding to the cooling storage room 13 below the partition plate 36.

The damper 4 is provided on the upper surface of the partition plate 36.
1 is attached. As shown in FIGS. 3 and 5 to 10, the damper 41 has an operation unit 42 facing downward from the center of the partition plate 36, and extends right and left from the operation unit 42.
An upright wall portion 43 that rises so as to approach the lower surface of the heat insulating partition member 11, a plurality of ventilation portions (round holes) 44 formed in the upright wall portion 43, and extends rearward from the upper end of the upright wall portion 43. The partition plate 36 is configured so as to be movable back and forth. This damper 41 is a partition plate 3
By loosening the decorative screw 47 screwed into the lower part 6 from below, it becomes movable, and when it is tightened, it becomes immovable at that position.

On the other hand, a grill member 51 is mounted in the main duct 7 at a position corresponding to the back of the heat insulating partition member 11. The grill member 51 is located at a height higher than the partition plate 36 and is attached over the passage cross section of the main duct 7, and has a plurality of openings (round holes) 52 in front and rear rows.
, 53 ... are provided. The closing plate portion 46 of the damper 41 corresponds to the lower side of the grill member 51,
In a state where the operating part 42 is pinched and the damper 41 is moved to the farthest (rear) position, all the openings 52 of the grill member 51 are formed.
·································································································································································· And the rear openings 53 are opened (see FIGS. 6 and 9). Further, in the state of being moved to the frontmost side, all the openings 52,..., 53,... Of the grill member 51 are opened (FIGS. 5, 8).

At this time, the operating portion 42 and the decorative screw 47 are located behind the bent portion of the partition plate 36 at the lower side of the front end,
It is contained within the bending dimensions. Therefore, the operation unit 42 and the cosmetic screw 47 do not obstruct the goods on the upper movable shelf 33.

Here, as shown in FIG. 11, a through-hole 61 is formed on the back surface of the heat insulating wall 2 at a position corresponding to the cold / hot switching storage room 12, and extends from the main duct 7 to the exhaust duct 28. The heater H for heating the movable shelves 34, 34
3, the electric wires 62, 62 connected to H3 are disposed at a very short distance from the through hole 61 as shown in FIG.
8 is drawn out. Then, the electrical box 2 in the machine room 21
The electric wires 63, 63 for supplying power to the heating heaters H3, H3 drawn out of the exhaust duct 28 are lifted in the exhaust duct 28, and in the exhaust duct 28, the heating heater H
3, a connector 64 (wire 6)
2 and 63 are provided with male and female terminals of a connector 64). Since the connection of the connector 64 is performed on the rear side of the heat insulating wall 2 before attaching the back plate 27, the operation is extremely easy as compared with the case where the connection is performed in the machine room 21.

At this time, the electric wires 63, 63 are suspended in the exhaust duct 28 by a hanger 66 detachably engaged with a grill 28 A (opening) at the upper end of the exhaust duct 28, and the connector 64 is connected through the through hole 61. Held in a high position. This avoids the inconvenience that the condensed water that enters the exhaust duct 28 via the electric wires 62 when the cold / temperature switching storage room 12 is used in refrigeration reaches the connector 64 and short-circuits. An opening 68 is formed in the back plate 27 at a position corresponding to the rear of the through hole 61 and extends from the through hole 61 to the area where the connector 64 exists, and is closed by a lid plate 69 that can be freely opened and closed. By utilizing this opening 68,
The connector 64 can be attached and detached.

If a failure such as disconnection occurs in the heating heater H3, first, the cover plate 69 is opened, fingers are inserted through the opening 68, and the connector 64 is removed. Next, the movable shelf 3
4 is pulled out forward and the whole is removed. Also, when attaching the movable shelf 34, the electric wire 62 of the new heater H 3 is connected to the electric wire 63 by the connector 64 using the opening 68. As described above, since the connector 64 can be attached and detached from the opening 68, maintenance of the heating heater H3 can be easily performed without removing the back plate 27.

The maintenance of the heating heater H3 can also be performed by pulling up the wires 62, 63 and the connector 64 using the hanger 66 and pulling them out of the grill 28A. In this case, since the electric wire 62 has an allowance for the drawer size of the movable shelf 34, the connector 64 can be sufficiently pulled out above the grill 28A. If the connector 64 is attached and detached above the grill 28A, maintenance of the heating heater H3 can be easily performed without removing the back plate 27 as described above. Therefore, if there is the hanger 66, there is no problem in maintenance even if the opening 68 and the cover plate 69 are not provided. However, when the position of the connector 64 is maintained without using the hanger 66, the opening 68 and the cover plate 69 are effective. Become.

Next, FIG. 13 shows an electric circuit of the open showcase 1. The control part of this electric circuit is configured on a control board in the electrical box 26. A commercial AC (100 V) power supply (connected to an outlet with a power plug P in FIG. 11) includes, for example, a cooling thermostat 71 for detecting the temperature of discharged cool air in the main duct 7, an overload relay 79, a start relay 72, The compressor 22 is connected via a starting condenser 83 and an operating condenser 84. The power supply is also connected to the blower 17, the blower 24 for the condenser, and the condensation prevention heater H1 for the cooling storage room. The fluorescent lamp 9 is connected to a power supply via a ballast 73 and a fluorescent lamp switch 81 (74 is a glow starter).

The following circuits are connected to the cold / hot changeover switches 82, 82 and thereafter. That is, the cold / hot changeover switch 8
An overheat protector 76 and an evaporating dish heater H2 are connected in series to the refrigeration contacts 2 and 82, and a dew condensation preventing heater H4 for a cold / hot switching storage room is connected in parallel to this series circuit. Also,
Heating heaters H3, H3 are connected to the warming contacts of the cold / hot changeover switches 82, 82. The warming thermostat 77, which detects the temperature of the product mounting surface of the movable shelf 34, and the overheat protector 7
8, and each series circuit is connected in parallel.

The operation of the above configuration will now be described. First,
A case where the inside of the cold / hot change storage room 12 is refrigerated in summer or the like will be described. In this case, the damper 41 is moved to the frontmost side as shown in FIGS. 5 and 8, for example. Thereby, all the openings 52 and 53 of the grill member 51 before and after are opened. The cold / hot changeover switch 82 (FIG. 13) switches to a refrigeration contact.

Now, when the temperature of the cool air in the main duct 7 is high and the cooling thermostat 71 closes the contact, the compressor 22
Is activated, and the cooler 18 exhibits a cooling effect. Since the blower 17 is in operation, the cool air that has exchanged heat with the cooler 18 is blown up in the main duct 7 by the blower 17. As described above, since all the openings 52 and 53 of the grill member 51 are open, the cool air blown up in the main duct 7 passes through the openings 52 and 53 as shown in FIG. 14 is discharged toward the opening of the cold / high temperature switching storage room 12. In addition, a part of the cooling air is discharged from the rear cold air outlet 40 into the cooling storage chamber 13.

Upper cool air outlet 14 and rear cool air outlet 4
The cool air discharged from 0 cools the inside of the cold / hot change storage room 12 and the cool storage room 13 while forming a cool air curtain at the opening of the storage room 8, and is sucked from the cool air suction port 16.
The cooling thermostat 71 is, for example, at + 5 ° C. to + 15 ° C.
Thus, the inside of the cold / hot switching storage room 12 and the inside of the cold storage room 13 are maintained at substantially the same refrigeration temperature. Further, waste heat from the compressor 22 and the condenser 23 in the machine room 21 rises in the exhaust duct 28 and is radiated from the grill 28A.

Next, when it is desired to display a product having a higher storage temperature in the cold / hot changeover storage room 12 than in the cold storage room 13, the damper 41 is pushed one step backward from the above-mentioned state (the one-stage stop position is partitioned). 6 and 9, only the openings 52 in the front row of the grill member 51 are closed by the closing plate portion 46 as shown in FIGS. As a result, the amount of cold air rising in the direction of the cold / hot switching storage room 12 is only the amount of air passing through the rear row of openings 53.

On the other hand, the cold air colliding with the closing plate portion 46 is guided by the cold air and heads toward the branch duct 37. Then, the air passes through the ventilation section 44 of the damper 41 and passes through the lower cool air discharge port 38.
From the cooling storage chamber 13. As a result, a larger amount of cold air is supplied to the cooling storage room 13, so that the temperature in the cold / hot switching storage room 12 becomes higher than the temperature in the cooling storage room 13, and the relatively high refrigeration temperature It is suitable for display of goods.

As described above, when the inside of the cold / hot change storage chamber 12 is refrigerated, the cold / hot change switch 82 is used as described above.
Is closed by the refrigeration contact, the heater H2 for the evaporating dish is energized, and the evaporating dish 31 is heated. At this time, since a large amount of dew or frost is generated in the cooler 18 by cooling both the cold / temperature switching storage room 12 and the cooling storage room 13, a relatively large amount of drain water is also stored in the evaporating dish 31. That is, the drain water is smoothly evaporated by heating by the evaporating dish heater H2. Further, the dew condensation prevention heater H1 for the cooling storage room and the dew condensation prevention heater H for the cooling / temperature switching storage room are provided.
4 is also energized and generates heat, so that dew condensation on the opening edges of the cooling storage room 13 and the cold / temperature switching storage room 12 is also prevented.

Next, a description will be given of a case where the inside of the cold / hot switching storage room 12 is used under warm storage. In this case, the damper 41
Is moved to the farthest (rear) side as shown in FIGS. Thereby, all the openings 5 in front and back of the grill member 51 are provided.
2 and 53 are closed by the closing plate portion 46. Further, the cold / hot changeover switch 82 (FIG. 13) switches to a contact for warming.

As a result, the amount of cold air rising in the direction of the cold / hot switching storage room 12 becomes zero. On the other hand, the cool air that has risen in the main duct 7 collides with the closing plate portion 46 and is guided by the same to head toward the branch duct 37. Then, the air passes through the ventilation part 44 of the damper 41 and is discharged from the lower cool air discharge port 38 toward the opening of the cooling storage chamber 13. As a result, cool air is supplied to the cooling storage room 13 to reach the refrigeration temperature.

On the other hand, since the cold / hot changeover switch 82 is closed to the warming contact as described above, this time the heating heater H
3. Electricity is supplied to H3 to generate heat. Thereby, the goods on the movable shelf 34 in the cold / hot switching storage room 12 are heated. In this case, the energization of the heating heaters H3, H3 is controlled by the heating thermostat 77, and the heater is heated to, for example, about the set value + 55 ° C.

Here, when the product is the above-mentioned plastic bottle or the like, the above-mentioned insole 35 is laid on the movable shelf 34. Since the heat transfer of the PET bottle is better than that of the can, the temperature becomes too high with the same setting as the can. However, the temperature rise of the product such as the PET bottle is suppressed by the heat buffering action of the insole 35. Therefore, if canned drinks and the like are displayed on another movable shelf 34 and the insole 35 is not laid there, it is possible to heat all the products to substantially the same temperature.

The insole 35 also has a heat storage function,
The temperature drop during the energization of the heating heater H3 being cut off by the heating thermostat 77 can be determined to be flat. This stabilizes the product's heat retention temperature,
It will also contribute to energy saving.

On the other hand, since the cold / hot changeover switch 82 is closed to the warming contact, the heater H2 for the evaporating dish is not energized. At this time, the cooler 18 has the cooling storage room 1
Only the condensation and frost due to the cooling of 3 occur, and there is no problem because the amount of drain water in the evaporating dish 31 is relatively small. Also, although the power supply to the dew condensation prevention heater H4 for the cold / cold storage room is stopped, since the inside of the cold / cold storage room 12 is kept warm, there is no danger of dew condensation occurring at the opening edge.

On the other hand, when the heating heater H3 is energized during the storage, the energization to the evaporating dish heater H2 and the dew condensation prevention heater H4 for the cold / cold storage room is stopped. The rated current used in the case 1 was suppressed to 15 A or less in the case of the embodiment through the case where the inside of the cold / cold storage room 12 was refrigerated and the case where the inside of the cold / hot switching storage room 12 was used. As a result, only a single power plug P having a normal rating of 125 V and a rating of 15 A suffices, so that the usability is extremely good and energy can be saved.

In the embodiment, the present invention is applied to an open showcase. However, the present invention is not limited to this, and a desktop showcase in which a storage room is surrounded by transparent glass may be used.

[0043]

As described above in detail, according to the present invention, in a showcase having a cold / hot changeable storage room which can be used for cold / hot changeover in a heat insulating wall opened on the front surface, the showcase is provided in the cold / hot changeable storage room. A heater, a through-hole formed on the back surface of the heat insulating wall, an electrical box provided in a machine room formed below the heat insulating wall, and a space provided on the rear side of the rear surface of the heat insulating wall. A rear plate, and an exhaust duct configured between the rear plate and the heat insulating wall and having a lower end communicating with the machine room, and electrically connecting the wires from the heater to the exhaust duct through the through hole. Since the wire is connected to the wire from the electrical box above the drawer and the through-hole, the length of the wire from the heater provided in the cold / cold storage room can be shortened, and the preparation work becomes easy.

In addition, the number of assembling steps is reduced, the workability is improved, and the amount of dust and the like adhered to the connection portion is reduced as compared with the case where the wires are connected to the electrical box in the machine room or the like. In particular, since the electric wire from the heater is connected to the electric wire from the electrical box above the through-hole, when using the cold storage room in cold storage, dew condensation reaches the connecting part through the electric wire, causing a short-circuit failure. The danger of causing is eliminated.

According to the invention of claim 2, in addition to the above, an opening is formed in the back plate at a position corresponding to the through hole,
Since the lid is openably and closably closed by the lid, the electric wires of the heater and the electric wires from the electrical box can be attached and detached from this opening. This makes it possible to easily perform maintenance on the heater without removing the back plate.

According to the third aspect of the present invention, the electric wire is suspended in the exhaust duct by the hanger detachably engaged with the upper end opening of the exhaust duct in the first aspect. By pulling the wires above the exhaust duct, it is possible to attach and detach the wires of the heater and the wires from the electrical box outside the exhaust duct. This makes it possible to easily perform maintenance on the heater without removing the back plate.

[Brief description of the drawings]

FIG. 1 is a front view of an open showcase according to an embodiment of the showcase of the present invention.

FIG. 2 is a vertical sectional side view of the open showcase of FIG. 1;

FIG. 3 is an enlarged vertical sectional side view of a cold / hot switching storage room portion of the open showcase of FIG. 1;

FIG. 4 is an enlarged front view of a movable shelf in the cold / hot change storage room of the open showcase of FIG. 1;

FIG. 5 is an enlarged sectional view of a heat insulating partition member of the open showcase of FIG. 1;

FIG. 6 is another enlarged sectional view of a heat insulating partition member of the open showcase of FIG. 1;

FIG. 7 is still another enlarged sectional view of the heat insulating partition member of the open showcase of FIG. 1;

FIG. 8 is a perspective view of a partition plate and a damper of the open showcase of FIG. 1;

FIG. 9 is another perspective view of a partition plate and a damper of the open showcase of FIG. 1;

FIG. 10 is still another perspective view of a partition plate and a damper of the open showcase of FIG. 1;

FIG. 11 is a schematic longitudinal sectional perspective view of the open showcase of FIG. 1;

FIG. 12 is a rear view of the open showcase of FIG. 1;

FIG. 13 is an electric circuit diagram of the open showcase of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Open showcase 2 Insulated wall 6 Duct plate 7 Main duct 8 Storage room 11 Insulated partitioning member 12 Cold / hot switching storage room 13 Cooling storage room 14 Upper cold air discharge port 16 Cold air inlet 17 Blower 18 Cooler 21 Machine room 22 Compressor 23 Condenser 24 Condenser blower 26 Electrical box 27 Back plate 28 Exhaust duct 31 Evaporating dish 33, 34 Movable shelf 36 Partition plate 37 Branch duct 38 Lower cold air discharge port 41 Damper 42 Operating part 43 Upright wall part 44 Vent part 46 Closure plate Part 51 Grill member 52, 53 Opening 61 Through hole 62, 63 Electric wire 64 Connector 66 Hanger 68 Opening 69 Cover plate 82 Cold / hot changeover switch H1 Dew condensation prevention heater for cooling storage room H2 Evaporating dish heater H3 Heating heater H4 Cold / hot changeover storage Room condensation prevention heater

Claims (3)

[Claims] 1. A showcase comprising a cold / hot switching storage room capable of switching between cold and hot temperatures in a heat insulating wall opened to the front, comprising: a heater provided in the cold / hot switching storage room; A through-hole, an electrical box provided in a machine room configured below the heat insulating wall, a rear plate provided at a rear rear side of the heat insulating wall with an interval, the rear plate and the heat insulation An exhaust duct having a lower end communicating with the machine room, drawing an electric wire from the heater out of the through hole into the exhaust duct, and providing the electrical equipment above the through hole. Showcase characterized by being connected to the electric wire from the box. 2. The showcase according to claim 1, wherein an opening is formed in the back plate at a position corresponding to the through-hole, and the back plate is closed and opened by a lid. 3. The showcase according to claim 1, wherein the electric wire is suspended in the exhaust duct by a hanger detachably engaged with an upper end opening of the exhaust duct.