JPH0539975A - Cold air circulation type open showcase - Google Patents

Abstract

PURPOSE:To refrigerate goods remained unsold easily and economically in power consumption by cooling only a limited area of a space for storage in the night. CONSTITUTION:A refrigerator consists of a refrigerator 4a with electromagnetic valves connected in series on one side, and a refrigerator 4b on the other side. A side opening 2b is provided below the lowest shelf and on the wall of an inner box 2, and a cover housing 16 to hold a cover 15 at a section facing the side opening 2b in a ventilation passage 3. The cover 15 is wound round a shaft 16a of the cover housing 16 with a spring which always gives the tensile force in the direction of winding, while having a closing plate 17 of wider breadth than that of the side opening 2b at the head thereof. And at a connection with the closing plate 17, a through hole is provided to flow the circulation air to a blowoff section 6 upon winding of the cover 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold air circulation type opening having an opening at a front surface thereof, which blows cold air from an air outlet facing the opening to form an air curtain to cool and keep a storage space. Regarding showcase.

[0002]

2. Description of the Related Art As a cold air circulation type open showcase of this type, one shown in FIG. 6 is known. Here, in FIG.
It is a sectional side view of the example of composition of the cold air circulation type open showcase by conventional technology. In FIG. 6, 2 is an inner box having an opening 2a on the front surface and having a substantially U-shaped cross section and forming a storage space 11 therein, and 1 is an outer box which is a heat insulating wall and covers the periphery of the inner box 2. A ventilation passage 3 is formed between the outer box 1 and the inner box 2 for circulating the air in the storage space. The upper and lower ends of the ventilation passage 3 face the opening 2a to form an air outlet 6 and a suction inlet 7, respectively.
A fan 5 which is an axial flow fan and a cooler 4 to which a refrigerant is supplied from a refrigerator (not shown) installed outside the open showcase through an expansion valve (not shown) are provided. The air in the storage space sucked from the suction port 7 by the fan 5 is supplied to the cooler 4 as circulating air, and the circulating air is cooled by the cold heat given from the refrigerant. Reference numeral 9 denotes a shelf on which a storage space 11 is placed, and the partition product 10 is placed on the upper and lower stages. Reference numeral 12 is a bottom opening provided at the bottom of the inner box 2 penetrating the inner box wall, 13 is a deck board installed so as to close the bottom opening 12, and 14 is a deck board provided as necessary. A deck board support for placing 13 at a position slightly distant from the bottom opening 12. Reference numeral 18 is an illuminating lamp that illuminates the product 10 or its surroundings, and 19 is a switch that turns ON / OFF the electricity to the illuminating lamp 18 as needed.

In the above open showcase, a large number of products 10 are displayed and stored on a shelf 9 and a deck board 13. Then, the air in the storage space is circulated through the ventilation passage 3 by the fan 5 as shown by the solid arrow, and the cooler 4
Then, the air is cooled to form cool air and is sent to the air outlet 6. This cold air is blown out from the air outlet 6 to form a cold air curtain 8. Therefore, the product 10 is efficiently cooled and kept cool.
In many cases, the illumination lamp 18 is turned on when the store is opened in the daytime and turned off when the store is closed at night.

[0004]

In the cold air circulation type open showcase according to the prior art described above, the unsold items when the store is opened during the daytime are carried to a place commonly called a backyard when the store is closed at night and the refrigerator is used. Store the product in the store and stop the operation of the showcase, then display this product in the showcase again the next morning, or continue the cooling operation of the showcase even after the store is closed at night, and turn off the lighting.
Then, the opening 2a of the showcase is covered with a night cover, and the unsold products are cooled and stored in the showcase as they are. However, in the method of storing unsold products in the backyard refrigerator at night, it takes a very laborious work of carrying the products to the backyard refrigerator after closing at night and displaying them again in the showcase before opening the next morning. There was a problem that it occurred. In addition, in the method of storing unsold products as they are in the showcase, power is wasted because the showcase must be operated under the same conditions as during the day even for cooling and storing a small number of products. There was a problem.

The present invention has been made in view of the above-mentioned problems of the prior art. The purpose of the present invention is that the cold air circulation type open showcase cools only a limited part of the storage space and is unsold. An object of the present invention is to provide an open showcase that does not require time and effort for cooling and storing unsold products and saves power by accumulating and storing products in a limited storage space.

[0006]

SUMMARY OF THE INVENTION In the present invention, the above objects are as follows: 1) An inner box having an opening at the front surface and having a U-shaped cross section, and a storage space for storing the product in a cold state, An outer box that covers the circumference of this inner box and forms a ventilation path with the inner box,
A fan disposed in the ventilation passage to circulate the air in the storage space, and a cooler disposed in the ventilation passage to cool the air in the storage space by receiving the supply of the refrigerant from the refrigerator. The storage space is divided into a plurality of upper and lower shelves, and a shelf for storing and storing the product is provided. The ventilation passage is formed so that upper and lower ends thereof face the opening and form a blowout portion and a suction portion of the circulating air, respectively. In the cold air circulation open showcase, the cooler is capable of varying its cooling capacity, and the inner box is provided with a side opening at a position lower than the shelf at the bottom of the wall, and this side part A cover body that is drawn out from the opening into the storage space to limit the circulation range of the circulating air to a position below the side opening; and 2) in the means described in the paragraph 1, the coolers are arranged such that the refrigerants are in parallel with each other. To flow And 2) one of the coolers has a solenoid valve connected in series to the cooler, and 3) the lighting device for illuminating the product in the means described in 1 or 2 above. A relay is connected to the load side of the switch that turns on and off the energization of the
The drive coil of the solenoid valve is connected in series to the auxiliary contact that is turned on and off with the FF to turn off the illumination lamp.
In this case, the solenoid valve is closed to block the flow of the refrigerant to one of the coolers, and 4) in the means described in 2 above, the one cooler to which the solenoid valve is connected is used for circulating air. 5) In the means described in the above item 2, the cover body is wound around the cover body storage box by a spring body that gives a tensile force in the winding direction. In addition, when it is pulled out to the storage space, it is pulled out from the side opening, and at its tip, a closing plate having a lateral width wider than the lateral width of the side opening is provided, and a cover body is provided at the connecting portion with this closing plate. Is provided with a through-hole for allowing the circulating air to flow to the blow-out portion during winding.

[0007]

In the present invention, because of the above-described structure, the illumination lamp is turned on during the daytime and one of the coolers is operated together with the other cooler, and the cover body is wound and the cover plate which is not accompanied by the cover body is turned on. The open showcase operates with the conventional cooling capacity because the circulation air passage is secured by closing the opening of the part and the through hole provided in the cover body, the circulation air circulates in the ventilation passage and opens from the outlet. A cool air curtain is blown out to cool the products in the storage space. However, at night, unsold products are accumulated in a limited part of the storage space of the same open showcase, for example, on the deck board, and the illumination lamp is turned off, which turns off the auxiliary contact of the relay. Since the solenoid valve is closed, the supply of the refrigerant to one cooler is cut off, and only the other cooler is operated, and the cover body is pulled out to close the ventilation passage and open the side opening. By blowing the circulating air from this side opening, only the limited partial deck of the storage space where the unsold goods are accumulated is cooled. As a result, the unsold products are efficiently cooled and stored.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a cold air circulation open showcase according to an embodiment of the present invention at night and when the store is closed,
2 is a vertical cross-sectional view of FIG. 1 in the daytime / opening state, FIG. 3 is a detailed perspective view of portion A in FIG. 1, FIG. 4 is an auxiliary circuit diagram according to one embodiment of the present invention, and FIG. FIG. 4 is a partial circuit diagram of a refrigeration circuit according to an embodiment of the present invention. The same parts as those in the conventional example shown in FIG. 1 to 5, 4a and 4b are refrigerating circuits 22,
The coolers are connected so that the refrigerant flows in parallel with each other, and the expansion valves 24a and 24b are connected in series.
An electromagnetic valve 23 having a drive coil 23a is connected to one of the coolers 4a. Both of the coolers 4a and 4b are arranged in the ventilation passage 3 so that one cooler 4a is located downstream of the other cooler 4b with respect to the circulating air. Reference numeral 16 is an intermediate position between the positions where both the coolers 4a and 4b are installed in the ventilation passage 3, and is also arranged at a position lower than the shelf at the bottom, and the circulation range of the circulating air is set to the deck board 13 Is a cover body storage box that stores a cover body 15 made of, for example, a soft plastic sheet and having a width dimension narrower than the width of a side opening to be described later. 2b is provided so as to penetrate the wall of the inner box 2 at a portion facing the cover body storage box 16 and at a lower position than the lowermost shelf 9, so that the cover body 15 can be removed when the cover body 15 is pulled out. It is a side opening for penetrating and blowing the circulating air toward the periphery of the deck board 13.

The cover body storage box 16 is provided with a shaft body 16a around which the cover body 15 is wound, and the cover body 15 is always given a pulling force in a winding direction around the shaft body 16a by a spring body (not shown). 17 has a width wider than that of the side opening 2b, which is attached to the tip portion of the cover body 15,
Moreover, it is a closing plate made of, for example, a hard plastic plate, and the connecting portion between the cover body 15 and the closing plate 17 has a through hole 15a for allowing circulating air to flow to the blowout portion 6 when the cover body 15 is wound. Is formed. Reference numeral 25 is a holding metal fitting that is attached to the storage space 11 side of the inner box 2 and holds the closing plate 17 at a position closing the side opening 2b when the cover body 15 is wound, and 26 is a lower front surface of the outer box 1. Installed, cover body 1
5 is a holding metal fitting that holds the closing plate 17 on the lower front surface of the outer box 1 so as to hold the cover body 15 at the drawn-out position when the 5 is drawn out.
Reference numeral 20 denotes an auxiliary circuit, which includes an illuminating lamp 18, a switch 19 for turning on and off the power supply to the illuminating lamp 18, and a relay 2 connected in parallel with the illuminating lamp 18 on the load side of the switch 19.
1. The auxiliary contact 21a that is turned on / off corresponding to the ON / OFF of the switch 19 of the relay 21 is provided, and the drive coil 23a of the solenoid valve 23 is connected in series with the auxiliary contact 21a.

Since the present invention has the above-mentioned structure, the switch 19 is turned on to turn on the illumination lamp 18 in the daytime.
This turns on the auxiliary contact 21a of the relay 21. Since the electromagnetic valve 23 is opened by turning on the auxiliary contact 21a, the refrigerant flows through the one cooler 4a together with the other cooler 4b, and both coolers 4a and 4b contribute to cooling. On the other hand, the cover body 15 is wound and the closing plate 17 is accordingly held by the holding metal fittings 25 to close the side opening 2 b, and the through hole 15 provided in the cover body 15.
Since the flow passage of the circulating air is secured by a, the open showcase operates with the conventional cooling capacity, and the circulating air circulates in the ventilation passage 3 and blows the cool air curtain 8 from the outlet 6 to the opening 2a. The product 10 formed and stored in the storage space 11 is cooled and stored. By the way, at night, the unsold products 10 are accumulated on the deck plate 13 of the same open showcase, and the illumination lamp 18 is turned off by turning off the switch 19, so that the auxiliary contact 21a of the relay 21 is turned off.
To do. When the auxiliary contact 21a is turned off, the solenoid valve 2
Since 3 is closed, one cooler 4a does not contribute to cooling and only the other cooler 4b is operated. On the other hand, since the cover body 15 is pulled out against the tensile force of the spring body 16a to close the ventilation passage 3 and open the side opening 2b, the circulating air is cooled by the other cooler 4b as shown by the dotted arrow.
After passing through the air passage 3 after passing through the side opening 2b in the middle of the air passage 3, the air flows around the deck plate 13 and is then returned to the air passage 3 that is sucked from the suction port 7 and returns to the air passage 3.
The unsold commodities 10 placed on 3 are cooled.

[0011]

According to the present invention, the cooling capacity of the cooler can be varied, and the inner box is provided with a side opening at a position lower than the bottom shelf of the wall, and the side opening is provided. The cooler operates with a normal strong cooling capacity during the daytime by being configured with a cover body that is drawn out from the opening into the storage space to limit the circulation range of the circulating air below the lowermost shelf. In addition, since the cover body is wound and the cover plate that does not accompanies it closes the side opening and the circulation passage for the circulating air is secured by the through hole provided in the cover body, the open showcase has the conventional cooling capacity. The circulating air circulates in the ventilation passage and blows from the outlet to the opening to form a cool air curtain to cool the products in the storage space. However, at night, the unsold products are collected in a limited area lower than the lowest shelf of the storage space of the same open showcase, for example, on the deck board. On the other hand, the cover body is pulled out to block the ventilation passage, and the side opening is opened to circulate the circulating air from the side opening, thereby limiting the circulation range of the circulating air to the lower part of the shelf at the bottom. The cooler operates with a weak cooling capacity corresponding to the limited circulation range of the circulating air, but since the circulating air flows only through a limited part of the storage space, the unsold goods are cooled efficiently. It will be. As a result, when the unsold products are cooled and stored, the products only need to be accumulated in the same open showcase, for example, on the deck plate, so that no labor is required, and the cooler can be operated with a weak cooling capacity. This has the effect of reducing power consumption.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a cold air circulation open showcase according to an embodiment of the present invention in a state at night and when the store is closed.

FIG. 2 is a vertical cross-sectional view of FIG. 1 in the daytime and when the store is opened.

FIG. 3 is a detailed perspective view of part A in FIG.

FIG. 4 is an auxiliary circuit diagram according to an embodiment of the present invention.

FIG. 5 is a partial circuit diagram of a refrigeration circuit according to an embodiment of the present invention.

FIG. 6 is a side sectional view of a configuration example of a cold air circulation type open showcase according to a conventional technique.

[Explanation of symbols]

 1 Outer Box 2 Inner Box 2a Opening 2b Side Opening 3 Ventilation Channel 4a Cooler 4b Cooler 5 Fan 6 Air Outlet 7 Suction Inlet 9 Shelf 10 Product 11 Storage Space 15 Cover Body 15a Through Portion 16 Cover Body Storage Box 16a Shaft 17 Blocking plate 18 Illumination 19 Switch 21 Relay 21a Auxiliary contact 23 Solenoid valve 23a Drive coil

Claims (5)

[Claims] 1. An inner box having an opening in the front surface and a substantially U-shaped cross section and having a storage space for keeping the product in a cold state, and ventilation is provided between the inner box and the inner box. An outer box that forms a passage, a fan that is arranged in this ventilation passage to circulate the air in the storage space, and a storage box that is also arranged in the ventilation passage and receives the supply of the refrigerant from the refrigerator. A cooler for cooling the air, and a shelf for partitioning the storage space into upper and lower stages to store and store the product are provided, and the ventilation passage has upper and lower ends facing the opening, respectively, and a blowout portion of the circulating air and In a cool air circulation type open showcase formed to form a suction part, the cooler shall be capable of varying its cooling capacity, and the inner box has a side portion at a position lower than the shelf at the bottom of the wall. There is an opening, and the side opening opens into the storage space. Cold air circulating open showcase, characterized in that it comprises a cover body to limit the circulation range of the circulating air to the lower than the side opening is. 2. The cold air circulation type open showcase according to claim 1, wherein the coolers are connected so that the refrigerant flows in parallel with each other, and one of the coolers is connected with a solenoid valve in series. A cool air circulation open showcase characterized by being composed of two coolers. 3. The cold air circulation type open showcase according to claim 1 or 2, wherein a relay is connected to a load side of a switch for turning on and off electricity to an illumination lamp for illuminating a product, and illumination of the relay. A drive coil of a solenoid valve is connected in series to an auxiliary contact that is turned ON / OFF when the lamp is turned ON / OFF, and when the energization to the illumination lamp is turned OFF, the solenoid valve is closed to one of the coolers. A cold air circulation open showcase characterized by blocking the flow of the refrigerant. 4. The cold air circulation open showcase according to claim 2, wherein one of the coolers to which an electromagnetic valve is connected is disposed downstream of the side opening with respect to the circulating air. Open showcase. 5. The cold air circulation type open showcase according to claim 1, wherein the cover body is wound around the cover body storage box by a spring body which gives a pulling force in a winding direction, and is drawn out into a storage space. When the cover body is wound, it is drawn out from the side opening, and the tip of the cover is provided with a closing plate having a width wider than that of the side opening. A cold air circulation type open showcase, which is provided with a through hole for allowing the air to flow to the outlet.