JP4346250B2 - Open showcase - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an open showcase having a night cover for covering an opening when a store is closed.
[0002]
[Prior art]
Traditionally, open showcases installed in stores such as supermarkets and convenience stores have been equipped with night-coverable covers (hereinafter referred to as night covers) to deliver products. When the store is closed, the night cover is pulled out to cover the opening, thereby preventing unnecessary cool air from flowing out of the opening and reducing power consumption.
[0003]
[Problems to be solved by the invention]
However, although the night cover is supported at the lower end of the opening, there is nothing to restrict both sides. Therefore, although the main body is located on the rear side of the night cover side, it moves freely on the front side, and a gap is generated between the night cover and the main body on both sides of the opening, and cold air leaks from this gap. Or there was an intrusion of outside air.
[0004]
Such cold air leakage or intrusion of outside air becomes a very serious problem in terms of energy reduction, particularly in the case of a freezer open showcase in which the storage room is frozen at a freezing temperature.
[0005]
The present invention was made in order to solve the conventional technical problems, and in an open showcase having a night cover, it is effective for cold air leakage and outside air intrusion when the opening is covered with the night cover. The purpose is to prevent or suppress.
[0006]
[Means for Solving the Problems]
The open showcase of the present invention is provided with a night cover that covers the opening of the main body, On one or both sides of a base material made of a woven fabric of internal hollow fiber material Permeates water vapor and maintains the permeation characteristics even at low temperatures. In the material which laminated the film And the width is substantially equal to or slightly narrower than the width of the opening of the main body, It is detachably attached to both sides of the opening of the main body, Of the night cover pulled out Both sides A guide rail that holds A ridge provided at the top of the opening and abutting across the left and right inside the drawn out night cover; The night cover is provided with a magnet provided at the tip of the night cover and a proximity sensor provided in the main body at a position where the magnet approaches when the night cover closes the opening. That the opening was closed by In addition to detecting, the guide rail is made of transparent material, and the night cover has a stopper function to stop at the pulled out position It is characterized by that.
[0007]
According to the present invention, in the open showcase provided with the night cover that covers the opening of the main body, the night cover has a width substantially equal to or slightly narrower than the width of the opening of the main body. of both sides Of the night cover provided and pulled out Both sides Since the guide rails are provided, the gap generated between the main body and the night cover at the side of the opening when the night cover is pulled out can be eliminated. Thereby, it becomes possible to effectively prevent or suppress cold air leakage and outside air intrusion from the opening in a state where the night cover is closed.
[0008]
Also, since the guide rail is located on the side of the opening where the air curtain normally formed in the opening of the open showcase is the weakest, it is necessary to provide the guide rail even when the night cover is not pulled out. The guide rail itself has an effect of preventing cold air leakage and outside air intrusion.
[0009]
As a result, the cooling performance and energy saving of the open showcase can be further improved, and particularly in the case of the open showcase in which the inside is cooled to the freezing temperature, a remarkable effect is exhibited.
[0010]
In addition, the night cover On one or both sides of the substrate Permeates water vapor and maintains the permeation characteristics even at low temperatures. Laminated film Since it is made of a material, it is possible to prevent the condensation on the night cover without forming a special hole. Therefore, it is possible to eliminate the cold air leakage and the outside air intrusion from the holes and further improve the operation efficiency.
[0011]
In particular, a magnet is provided at the tip of the night cover, and a proximity sensor is provided in the main body where the magnet approaches when the night cover closes the opening. Thus, it is possible to detect that the opening is closed and automatically execute various controls to be performed when the night cover is closed.
[0012]
Also, The guide rails are provided on both sides of the opening, and the night cover is pulled out. Both sides Since the gap between the main body and the night cover on both sides of the opening when the night cover is pulled out can be eliminated, the effect of preventing cold air leakage and outside air intrusion can be further improved. It will be.
[0013]
Also, Since the guide rail is made of a transparent material, the guide rail becomes inconspicuous in the opening of the main body, and adverse effects on the appearance of the open showcase can be minimized.
[0014]
Also, Since the guide rail is detachably attached to the main body, it can be removed when the guide rail is unnecessary, such as at the time of opening a store, to prevent it from interfering with delivery of goods. Will be able to.
[0015]
Also, Located at the top of the opening and abutting across the left and right inside the night cover Ridge Thus, there is no gap between the main body and the night cover at the upper part of the opening, and the effect of preventing cold air leakage and outside air intrusion can be further improved.
[0016]
In particular, The night cover is pulled out Has a stopper function to stop Therefore, it is possible to open the opening as much as necessary when replenishing goods, and cover the rest with a night cover, minimizing cold air leakage and outside air entry during work. It becomes possible. In particular, in the present invention, the night cover Both Since the side portion is held by the guide rail, the night cover stopped in the middle of the opening can be stably held.
[0017]
Furthermore, the night cover is Laminate a film that allows water vapor to permeate as described above on one or both sides of a base material made of an internal hollow fiber material, and that maintains the permeation characteristics even at low temperatures. Since it is configured, the heat insulating performance of the night cover is improved, the heat intrusion transmitted through the night cover itself is suppressed, and the cooling performance and the energy saving effect can be further improved.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a front view of an open showcase 1 as an embodiment of the present invention, FIG. 2 is a vertical side view of the open showcase 1, FIG. 3 is a vertical side view of the upper end of an opening 21 of the open showcase 1, and FIG. FIG. 5 is a vertical side view of the lower end of the opening 21 of the open showcase 1, FIG. 5 is a vertical side view of the upper end of the opening 21 of the open showcase 1 in a state in which the night cover 46 is pulled out, and FIG. FIG. 3 is a vertical side view of the lower end of the opening 21 of the open showcase 1.
[0019]
The open showcase 1 of the embodiment shown in each of the above figures is a refrigeration type multistage open showcase that is installed in a store such as a supermarket, for example. A main body 5 is composed of side plates 3 and 3 attached to both sides of the heat insulating wall 2. An outer layer partition plate 4 and an inner layer partition plate 6 are attached to the inner side of the heat insulation wall 2 with a space therebetween, and the space between the heat insulation wall 2 and the outer layer partition plate 4 is between the outer layer duct 7 and the inner and outer layer partition plates 6 and 4. Is an inner layer duct 8 and the inner side of the inner layer partition plate 6 is a storage chamber 9.
[0020]
A plurality of shelves 11 are built in the storage chamber 9, and a deck pan 12 is attached to the bottom of the storage chamber 9. The bottom duct connected to the ducts 7, 8 is below the deck pan 12. It is set to 13. A fan case 14 containing an inner layer fan F1 and an outer layer fan F2 described later is installed in the bottom duct 13, and a cooler 16 included in the refrigerant circuit of the refrigeration apparatus is vertically installed in the inner layer duct 8. Has been.
[0021]
An outer layer discharge port 22 and an inner layer discharge port 23 are arranged in front and rear at the upper edge of the front opening 21 of the storage chamber 9 (main body 5) surrounded by the heat insulating wall 2 and the side plates 3 and 3. The discharge port 22 communicates with the outer layer duct 7 and the inner layer discharge port 23 communicates with the inner layer duct 8. A suction port 24 is formed at the lower edge of the opening 21 and communicates with the bottom duct 13.
[0022]
When the inner layer blower F1 and the outer layer blower F2 in the fan case 14 are operated, the air in the bottom duct 13 is blown out toward the rear inner layer duct 7 and the outer layer duct 8 and blown up in the outer layer duct 7 as it is. At the same time, after heat exchange with the cooler 16, the air is blown up in the inner layer duct 8 and blown out from the inner layer discharge port 22 and the outer layer discharge port 23 at the upper edge of the opening 21 toward the suction port 24 at the lower edge.
[0023]
An outside air duct member 20 is attached to the front end of the ceiling wall 2A of the heat insulating wall 2 over the entire width, and the outside air discharge port 25 of the outside air duct member 20 is on the front side of the outer layer discharge port 22 at the upper edge of the front opening 21. Open downward. In the outside air duct member 20, an outside air blower F3 described later is disposed. When the outside air blower F3 is operated, the outside air above the top wall 2A is sucked and blown out from the outside air discharge port 25 toward the opening 21 on the front side of the outer layer discharge port 23.
[0024]
Thereby, the opening 21 of the storage chamber 9 is formed with a three-layer air curtain comprising an inner cold air curtain, an outer air curtain protecting the inner air curtain, and an outermost outer air curtain protecting the outer air curtain, Intrusion of outside air from the opening 21 is prevented or suppressed, and a part of the inside cold air curtain circulates in the storage chamber 9 to cool the inside of the storage chamber 9. And these cold air etc. return to the bottom duct 13 from the suction inlet 24, and are suck | inhaled again by the air blowers F1 and F2.
[0025]
On the other hand, on the outside air duct member 20 of the top wall 2A of the heat insulating wall 2, a canopy (庇) 26 is mounted to protrude forward over the entire width. The inside of the canopy 26, the inside of the inner layer discharge port 23, and each On the lower surface of the shelf 11, an external fluorescent lamp 27 and an internal fluorescent lamp 30 are attached as illumination devices. On the other hand, a handrail 28 is attached to the upper end of the front wall 2B that borders the lower edge of the opening 21 of the heat insulating wall 2 over the entire width. Note that the side plate 3 has a predetermined width, and a see-through glass 29 is fitted in the front center portion thereof.
[0026]
Further, a holder 48 having a night cover 46 attached thereto as shown in FIG. 3 is attached to the lower surface of the canopy 26 behind the outside fluorescent lamp 27 (the outside fluorescent lamp 27 is not shown in FIG. 3). . Further, a predetermined insertion space G opened downward is formed between the holder 48 and the rear wall 26A depending on the rear end of the canopy 26, and a protrusion 31 constituting a seal structure protruding forward is formed on the rear wall 26A. Is bent over substantially the entire width of the opening 21.
[0027]
The night cover 46 is pulled downward from the rear end of the lower surface of the holder 48. Further, the night cover 46 allows water vapor to permeate through one or both sides of a base material made of an internal hollow fiber fabric, and the permeation characteristics are maintained even at a low temperature (at least a temperature of −20 ° C. to + 16 ° C. described later). It consists of a material laminated with a film. The night cover 46 is wound around a torsion bar (not shown) attached to the holder 48 and is urged in the direction of being always taken up. When the night cover 46 is pulled out, it is in the middle of fully closed and fully opened. A stopper function is also provided for stopping at the position shown in FIG. The stopper function is released by a predetermined operation of pulling downward, and is wound up.
[0028]
In addition, the lateral width of the night cover 46 is approximately the same as or slightly narrower than the width of the opening 21 in the embodiment. An edge member 56 made of hard resin is attached to the front end (lower edge) of the night cover 46, and a magnet MG constituting detection means is attached to the lower part of the rear surface of the edge member 56. A handle 57 is formed at the center of the edge member 56.
[0029]
On the other hand, 32 is a guide rail that is provided on both sides of the opening 21 and is provided on the inner surfaces of the side plates 3 and 3 so as to extend vertically. The guide rail 32 is inserted into the insertion space G between the holder 48 and the rear wall 26A of the canopy 26 from the bottom as shown in FIG. By placing and engaging the upper end of the front wall 2B of the heat insulating wall 2 as described above, it is inward from the front ends of the side plates 3 and 3 and ahead of the line connecting the front end of the outside air discharge port 25 and the front end of the suction port 24. Positioned and detachably attached to the main body 5.
[0030]
The guide rail 32 is formed of a transparent hard resin and has a substantially U-shaped cross section having a groove 32B extending in the longitudinal direction. The opening of the U-shaped groove 32B is directed toward the opening 21. The left and right guide rails 32, 32 face each other, and the upper ends of the grooves 32B of the guide rails 32, 32 are open. Even when the night cover 46 is not closed due to the presence of the guide rails 32, 32, there is an effect of protecting the air curtain whose left and right ends are weakened.
[0031]
Furthermore, 36 is a proximity sensor as a detecting means attached to the rear end of the upper end of the front wall 2B, and comprises a limit switch. The proximity sensor 36 always opens the section, and closes the section when the magnet approaches.
[0032]
Next, FIG. 7 shows an electric circuit diagram of the open showcase 1. In the figure, reference numeral 67 denotes a defrosting heater of the cooler 16, which is connected to a three-phase AC 200 V power source via a contact 69 of an overload relay 68 and a defrosting magnet switch 72. Reference numeral 70 denotes a controller composed of a microcomputer constituting the control device. The controller 70 includes a temperature adjustment contact 74, a defrosting contact 75, an outside air blower output 83, a cold non-switching output 77, an inside lamp output 78, and an outside lamp output 79. , An alarm device (comprising a lamp and a buzzer) 76 and a power source (controller operating power source), a temperature control sensor 80 for detecting the temperature of the cool air discharged to the storage chamber 9, and the defrosting end temperature of the cooler 16 A defrosting sensor 81 for detecting, an alarm sensor 82 for detecting an abnormally high temperature in the storage chamber 9, and the proximity sensor 36 are connected.
[0033]
The liquid electromagnetic valve 71 attached to the refrigerant circuit for controlling the supply of the liquid refrigerant to the cooler 16 is connected to a power source (single-phase 200 V) via a temperature adjustment contact 74 of the controller 70. . The defrosting magnet switch 72 is connected to a power source via a defrosting contact 75 of the controller 70. A dew proof heater 73 for preventing condensation on the inner layer blower F1, the outer layer blower F2 and the handrail 28 is connected to a power source via a cold non-switching output 77 of the controller 70. The outside air blower F <b> 3 is connected to a power source via the outside air blower output 83 of the controller 70.
[0034]
The external fluorescent lamp 27 is connected to a power source via an external lamp output 78 of the controller 70, and the internal fluorescent lamp 30 (shown here as one) is connected to a power source via an internal lamp output 79 of the controller 70. It is connected.
[0035]
With the above configuration, when the open showcase 1 is powered on, the controller 70 turns on the cold non-switching output 77 in the case of the refrigeration setting based on the operation of the cold non-switching switch (not shown), and the inner layer blower F1, The outer layer blower F2 and the dew proof heater 73 are energized to operate or generate heat, and the outside air blower F3 is brought into an operable state. In the non-cold setting, all these energizations are stopped.
[0036]
If the proximity sensor 36 is OFF (intercept opening), the controller 70 controls the liquid electromagnetic valve 71 based on the output of the temperature adjustment sensor 80, for example, the set temperature of the discharge cold air. Control is performed to turn OFF (close) at 20 ° C. and ON (open) at −18 ° C. on the differential 2 deg. Further, the outside air blower output 83 is turned on to operate the outside air blower F3. As a result, a three-layer air curtain is formed in the opening 21 as described above, and the inside of the storage chamber 9 is cooled to the freezing temperature.
[0037]
When an interior lamp switch (not shown) is turned on, the controller 70 turns on the interior lamp output 79 to light the interior fluorescent lamp 30. Further, when an outside lamp switch (not shown) is turned on, the controller 70 turns on the outside lamp output 78 and lights the outside fluorescent lamp 27. Here, the inside light switch and the outside light switch are turned on when the store is opened, and are turned off when the store is closed. Even when the store is closed, the outdoor lamp switch is turned on when a product is replenished.
[0038]
Further, the controller 70 turns on the defrosting contact 75 to energize the defrosting magnet switch 72 at a predetermined time or based on the operation of a defrosting switch (not shown), closes the contact 69, and turns on the defrosting heater 67. Energize. Thus, the cooler 16 is defrosted. This defrosting is terminated when the defrosting sensor 81 detects a predetermined defrosting end temperature of the cooler 16, and the contact 75 is turned off. Further, when the temperature in the storage chamber 9 becomes abnormally high, the controller 70 detects this based on the output of the alarm sensor 82 and operates the alarm device 76.
[0039]
Next, the operation of the night cover 46 will be described. During the opening of the store, the night cover 46 is wound around the holder 48 as shown in FIG. Further, the interior lamp switch and the exterior lamp switch are also turned on, and the interior fluorescent lamp 30 and the exterior fluorescent lamp 27 are turned on as described above. Further, at this time, the guide rail 32 is removed. It may be left attached.
[0040]
Next, when closing the store, the guide rails 32 are attached to both sides of the opening 21 as described above. Then, the night cover 46 is pulled out from the holder 48 and lowered, and the handle 57 is hooked on a hook (not shown) at the upper end of the front wall 2B to cover the opening 21 outside the three-layer air curtain. Further, the outside lamp switch and the inside lamp switch are also turned off, and the outside fluorescent lamp 27 and the inside fluorescent lamp 30 are also turned off.
[0041]
At this time, both side portions of the night cover 46 enter the groove 32B of the guide rail 32 from the upper end and are held in the upper and lower sides (FIGS. 5 and 6). Further, the ridge 31 abuts the left and right sides of the night cover 46 drawn out as shown in FIG. This eliminates the gap between the night cover 46 and the main body 5 at both sides and the upper edge of the opening 21, thereby preventing or extremely reducing cold air leakage and intrusion of outside air.
[0042]
Further, since the magnet MG is close to the proximity sensor 36, the intercept is turned on (closed). Based on ON of the intercept of the proximity sensor 36, the controller 70 determines that the opening 21 is covered with the night cover 46, and the controller 70 raises the set temperature of the discharged cold air by 2 degrees to -18 ° C. And based on the output of the temperature control sensor 80, the liquid solenoid valve 71 is controlled to be turned off (closed) at -18 ° C and turned on (opened) at -16 ° C on the differential 2 deg. This is called night setback control. Further, the outside air blower output 83 is turned off to stop the outside air blower F3.
[0043]
Here, when the night cover 46 is closed, the cold air leakage and the outside air intrusion from the opening 21 are almost eliminated or significantly reduced. Further, since the interior fluorescent lamp 30 is also turned off, the inside of the storage chamber 9 can be maintained at the freezing temperature without any trouble even if the set temperature of the discharged cold air is increased. On the other hand, increasing the set temperature results in significant energy savings. In addition, since there is no need for an air curtain due to the outside air (on the contrary, it has an adverse effect), the outside air blower F3 is stopped, and the energy is reduced accordingly.
[0044]
In addition, when the rotation speed control of the inner layer blower F1 and the outer layer blower F2 is possible, the controller 70 determines that the night cover 46 is closed based on the interception OFF of the proximity sensor 36 as described above. , F2 may be rotated at a low speed. When the night cover 46 is closed, the need for an air curtain is reduced. Therefore, the number of rotations of the fans F1 and F2 is reduced to save energy.
[0045]
Here, when the night cover 46 is not completely closed during the closing of the store and is in a so-called half-open state, the magnet MG is not in proximity to the proximity sensor 36, so the intercept of the proximity sensor 36 is OFF (open). . The controller 70 is opened when the interior light switch and the exterior light switch are OFF (the shop is closed. That is, when the night cover 46 is not fully opened) and the proximity sensor 36 is OFF. The alarm device 76 is operated by determining that the night cover 46 is opened (including half-opened) during the closing of the store instead of being fully opened. As a result, the user can be notified of the opening of the night cover 46 quickly.
[0046]
On the other hand, when replenishing goods in the lower part of the storage room 9 during closing (before opening, etc.), the night cover 46 is lowered to the middle of the opening 21 as shown in FIG. The switch is turned on to turn on only the external fluorescent lamp 27 as described above, and the product is replenished. As a result, it is possible to minimize the leakage of cold air and the entry of outside air during the replenishment operation. At this time, since the magnet MG is separated upward from the proximity sensor 36, the intercept is turned off (opened). However, the controller 70 determines that the product replenishing operation is in progress when the outdoor light switch is turned on, and the above-described operation is performed. The alarm device 79 is not operated.
[0047]
In the embodiment, the half-open state of the night cover 46 is determined by distinguishing it from the fully-open state by the outside light switch, the inside light switch, and the proximity sensor 36. However, as shown by a broken line in FIG. And the controller 70 can determine whether the night cover 46 is fully opened by turning on the intercept of the proximity sensor 36A. That is, according to such a configuration, the alarm device 76 may be operated when both the proximity sensors 36 and 36A are OFF.
[0048]
In addition, in the state where the night cover 46 covers the opening 21 as described above, the blowing of the air to the opening 21 by the outside air blower F3 is rather the result of sending the outside air into the storage chamber 9, so it is necessary to stop. Therefore, other circuit configurations focusing on only the point of stopping such an outside air blower F3 are shown in FIGS. In each figure, the same reference numerals as those in FIG. 7 have the same or similar functions.
[0049]
In the example of FIG. 8, the outside air blower F <b> 3 is connected to the outside lamp output 78 of the controller 70 in parallel with the outside fluorescent lamp 27. According to such a configuration, it is possible to stop the blower F3 for the outside air in conjunction with the extinction of the outside fluorescent lamp 27 that is turned off when the store is closed. However, in this case, when the product is replenished as described above, the outside air blower F3 is operated together with the outside fluorescent lamp 27, but there is no problem because the night cover 46 is also opened during the operation.
[0050]
In the example of FIG. 9, the outside air blower F3 forms a series circuit with a normally closed contact 87 of a relay 86 connected in series with the proximity sensor 36, and this series circuit is connected in parallel with the inner layer blower F1 and the like. According to such a configuration, when the night cover 46 is closed, only the outside air blower F3 can be stopped.
[0051]
FIG. 10 shows an example of an open showcase that does not have the internal fluorescent lamp 30. In this case, the outside air blower F3 is connected using the inside light output 79 of the controller 70, and can be stopped by turning off the inside light switch when the store is closed.
[0052]
FIG. 11 shows an example of an open showcase that does not have the internal fluorescent lamp 30. The external air blower F 3 is used in series with the normally closed contact 87 of the relay 86 using the internal lamp output 79 of the controller 70. And can be stopped by turning off the interior light switch when the store is closed and closing the night cover 46.
[0053]
FIG. 12 shows an example of an open showcase that does not have the internal fluorescent lamp 30 and an example in which only the proximity sensor 36A above the opening 21 is provided. 79 is connected to the outside air blower F3. Then, the controller 70 turns off the interior lamp output 79 in response to turning off of the proximity sensor 36A when the night cover 46 is pulled out, and stops the outside air blower F3.
[0054]
Thus, in the open showcase 1 having the night cover 46 that covers the opening 21 of the main body 5, the guide rail 32 that is provided on the side of the opening 21 and holds the side of the drawn night cover 46. Therefore, when the night cover 46 is pulled out, a gap generated between the main body 5 and the night cover 46 on the side of the opening 21 can be eliminated. Thereby, it becomes possible to effectively prevent or suppress the cold air leakage and the outside air intrusion from the opening 21 in the state in which the night cover 46 is closed.
[0055]
In addition, since the guide rail 32 is located on the side of the opening 21 where the air curtain formed in the opening 21 of the open showcase 1 is the weakest, the guide rail 32 even when the night cover 46 is not pulled out. If the guide rail 32 is provided, the guide rail 32 itself has an effect of preventing cold air leakage and intrusion of outside air. As a result, it is possible to further improve the cooling performance and energy saving of the open showcase 1, and in particular, in the case of the open showcase that cools the interior to the freezing temperature as in the embodiment, it has a remarkable effect. Play.
[0056]
Further, since the guide rails 32 are provided on both sides of the opening 21 and hold both sides of the night cover 46 that is pulled out, the guide rail 32 is generated between the main body 5 and the night cover 46 on both sides of the opening 21 when the night cover 46 is pulled out. The gap can be eliminated, and the effect of preventing cold air leakage and outside air intrusion can be further improved.
[0057]
Further, since the guide rail 32 is made of a transparent material, the guide rail 32 becomes inconspicuous in the opening 21 of the main body 5 even if the guide rail 32 is used with the guide rail 32 attached while the store is open. The adverse effect on the appearance of 1 is also minimized.
[0058]
Moreover, since the guide rail 32 is detachably attached to the main body 5, it can be removed when the guide rail 32 is unnecessary, such as at the time of opening a store, and it may obstruct the delivery of the product. Can be prevented.
[0059]
Moreover, since the protrusion 31 which is located in the upper part of the opening part 21 and contact | abuts right and left inside the night cover 46 pulled out is provided, the clearance gap between the main body 5 and the night cover 46 in the upper part of the opening part 21 is also eliminated. Further, the effect of preventing cold air leakage and outside air intrusion can be further improved.
[0060]
Further, since the night cover 46 can be stopped at the position where it is pulled out, the opening 21 can be opened as much as necessary when replenishing goods, and the rest can be covered with the night cover 46. It is possible to minimize the leakage of cold air and the entry of outside air during work. In particular, since the side portion of the night cover 46 is held by the guide rail 32, the night cover 46 stopped in the middle of the opening 21 can be stably held.
[0061]
Further, since the night cover 46 is made of an internal hollow fiber material, the heat insulating performance of the night cover 46 is improved, the heat intrusion transmitted through the night cover 46 itself is suppressed, and the cooling performance and the energy saving effect are further improved. Can be improved.
[0062]
The night cover 46 is made of a material that allows water vapor to pass therethrough and maintains the permeation characteristics even at a low temperature. Therefore, without forming a special hole or the like, dew condensation on the night cover can be achieved. Occurrence can be prevented. Therefore, it is possible to eliminate the cold air leakage and the outside air intrusion from the holes and further improve the operation efficiency.
[0063]
【The invention's effect】
As described above in detail, according to the present invention, in an open showcase having a night cover covering the opening of the main body, the night cover has a width substantially equal to or slightly narrower than the width of the opening of the main body. Of the opening both sides Of the night cover provided and pulled out Both sides Since the guide rails are provided, the gap generated between the main body and the night cover at the side of the opening when the night cover is pulled out can be eliminated. Thereby, it becomes possible to effectively prevent or suppress cold air leakage and outside air intrusion from the opening in a state where the night cover is closed.
[0064]
Also, since the guide rail is located on the side of the opening where the air curtain normally formed in the opening of the open showcase is the weakest, it is necessary to provide the guide rail even when the night cover is not pulled out. The guide rail itself has an effect of preventing cold air leakage and outside air intrusion.
[0065]
As a result, the cooling performance and energy saving of the open showcase can be further improved, and particularly in the case of the open showcase in which the inside is cooled to the freezing temperature, a remarkable effect is exhibited.
[0066]
In addition, the night cover On one or both sides of the substrate Permeates water vapor and maintains the permeation characteristics even at low temperatures. Laminated film Since it is made of a material, it is possible to prevent the condensation on the night cover without forming a special hole. Therefore, it is possible to eliminate the cold air leakage and the outside air intrusion from the holes and further improve the operation efficiency.
[0067]
In particular, a magnet is provided at the tip of the night cover, and a proximity sensor is provided in the main body where the magnet approaches when the night cover closes the opening. Thus, it is possible to detect that the opening is closed and automatically execute various controls to be performed when the night cover is closed.
[0068]
Also, The guide rails are provided on both sides of the opening, and the night cover is pulled out. Both sides Since the gap between the main body and the night cover on both sides of the opening when the night cover is pulled out can be eliminated, the effect of preventing cold air leakage and outside air intrusion can be further improved. It will be.
[0069]
Also, Since the guide rail is made of a transparent material, the guide rail becomes inconspicuous in the opening of the main body, and adverse effects on the appearance of the open showcase can be minimized.
[0070]
Also, Since the guide rail is detachably attached to the main body, it can be removed when the guide rail is unnecessary, such as at the time of opening a store, to prevent it from interfering with delivery of goods. Will be able to.
[0071]
Also, Located at the top of the opening and abutting across the left and right inside the night cover Ridge Thus, there is no gap between the main body and the night cover at the upper part of the opening, and the effect of preventing cold air leakage and outside air intrusion can be further improved.
[0072]
In particular, The night cover is pulled out Has a stopper function to stop Therefore, it is possible to open the opening as much as necessary when replenishing goods, and cover the rest with a night cover, minimizing cold air leakage and outside air entry during work. It becomes possible. In particular, in the present invention, the night cover Both Since the side portion is held by the guide rail, the night cover stopped in the middle of the opening can be stably held.
[0073]
Furthermore, the night cover is Laminate a film that allows water vapor to permeate as described above on one or both sides of a base material made of an internal hollow fiber material, and that maintains the permeation characteristics even at low temperatures. Since it is configured, the heat insulating performance of the night cover is improved, the heat intrusion transmitted through the night cover itself is suppressed, and the cooling performance and the energy saving effect can be further improved.
[Brief description of the drawings]
FIG. 1 is a front view of an open showcase as an embodiment of the present invention.
2 is a vertical side view of the open showcase of FIG. 1. FIG.
3 is a vertical side view of the upper end of the opening of the open showcase of FIG. 2. FIG.
4 is a vertical side view of the lower end of the opening of the open showcase of FIG. 2. FIG.
FIG. 5 is a vertical side view of the upper end of the opening of the open showcase of the present invention with the night cover pulled out.
FIG. 6 is a vertical side view of the lower end of the opening of the open showcase with the night cover pulled out.
FIG. 7 is an electric circuit diagram of the open showcase of the present invention.
FIG. 8 is a diagram showing another embodiment of the electric circuit of the open showcase of the present invention.
FIG. 9 is a diagram showing another embodiment of the electric circuit of the open showcase of the present invention.
FIG. 10 is a view showing still another embodiment of the electric circuit of the open showcase of the present invention.
FIG. 11 is a view showing still another embodiment of the electric circuit of the open showcase of the present invention.
FIG. 12 is a view showing still another embodiment of the electric circuit of the open showcase of the present invention.
[Explanation of symbols]
1 Open showcase
2 Insulation wall
3 Side plate
21 opening
26 Canopy
31 ridges
32 Guide rail
36 Proximity sensor
46 Night Cover
48 Holder
56 Edge member
F1 inner layer blower
F2 outer layer blower
F3 Outside air blower
MG magnet

Claims (1)

In an open showcase with a night cover that covers the opening of the main body,
The night cover is made of a material obtained by laminating a film that allows water vapor to permeate on one or both sides of a base material made of an internal hollow fiber material and maintains the permeation characteristics even at low temperatures, and has a width. Is substantially the same as or slightly narrower than the width of the opening of the main body,
Guide rails that are detachably attached to both sides of the opening of the main body and hold both sides of the night cover that is pulled out,
A ridge that is provided at the top of the opening, and that abuts the left and right inside the drawn night cover;
A magnet provided at the tip of the night cover;
A proximity sensor provided on the main body at a position where the magnet approaches when the night cover closes the opening;
As the magnet approaches the proximity sensor, it is detected that the opening is closed by the night cover ,
The guide rail is made of a transparent material,
An open showcase characterized in that the night cover has a stopper function to stop at the pulled out position .

Images