JP3148717U - Open showcase - Google Patents

Abstract

[PROBLEMS] To safely form an electrostatic field for the purpose of maintaining freshness for a long period in an open showcase that can be easily seen by customers such as fresh products and plants. A display device comprising a conductive display shelf whose front is open and connected to a refrigerator and an electrostatic field generating transformer for the purpose of maintaining quality and selling the display, when the human body approaches the display device. A human body detection device that cuts off the power supply of the electrostatic field generating transformer and switches the colored LED to the white LED is provided as an illumination device of the display device. [Selection] Figure 5

Description

The present invention relates to an improvement of an open showcase for refrigerated display sales of fresh flowers, fresh foods, processed foods and the like.

  In various stores that display and sell fresh products, open showcases having a refrigeration function are widely used so that the fresh products to be provided can be easily seen by customers and can be taken out arbitrarily. Such an open showcase is provided with a plurality of display shelves on which fresh products are placed, and has functions equivalent to those of a refrigerator such as a compressor and a condenser.

Patent Document 1 discloses a method of storing refrigerated fresh food for a long period of time in an atmosphere in which an electrostatic field is formed in a refrigerator for the purpose of maintaining the freshness of fresh foods and processed foods and suppressing the growth of plants. . As the electrostatic field forming means, a high-voltage electrostatic transformer is used, one pole on the secondary high-voltage side is insulated, and the other pole is connected to a shelf or case of a conductive metal material. As a result, negative electrons due to electrostatic induction are applied, and freshness and fresh food placed on the shelf can be refrigerated and stored in an electrostatic field atmosphere to maintain freshness for a long period of time. In this case, the negative-electron generation condition is that the current value on the primary side of the high-voltage electrostatic transformer 100V is 0.02A to 0.3A per 1 m ^{2 of the} electrode, and the secondary side voltage that satisfies the primary side current value is 5000V to 20000V.

In the electrostatic field atmosphere formed in the refrigerator, it is usually stored in a temperature range of 3 ° to -3 °, but it does not freeze even at a low temperature of about -5 ° C. For this reason, it can be stored in a fresh state for a long time without causing cell destruction during freezing, and is a very suitable storage method for storing fresh food.
Japanese Patent Application No. 2001-215074

The main purpose of the open showcase is to display fresh products and plants while refrigerated, and it is necessary to install the open showcase in a position where it can be seen and touched by the customer. Moreover, it is an over-the-counter sales method that approaches or touches display objects and display shelves. In order to form an electrostatic field in such an open showcase, first of all, the minimum requirement is to ensure safety. However, it is also important to be able to maintain the state of the electrostatic field atmosphere as much as possible.

  In view of the above situation, the inventor finally completed the present invention as a result of earnest research. The feature of this inventor is that the front is opened for the purpose of quality maintenance and display sales. A display device comprising a conductive display shelf connected to a transformer, wherein when a human body approaches the display device, the power of the electrostatic field generating transformer is shut off and a colored LED is used as a lighting device for the display device. The human body detection device for switching to the LED is provided.

  As an open showcase in the present invention, an electrostatic field generating power source may be built in the showcase body, but it may be provided separately. The structure of the showcase main body may be the same as that of a general open showcase except for the electrostatic field generating power source and related devices.

  In order to form an electrostatic field in the display space of the open showcase, an electrostatic field generating transformer is connected to a display shelf provided in the display space. Along with this, an insulating space is formed by disposing an insulator on the bottom, back and side surfaces of the display space so that current does not leak to the outside. The insulator may be a plastic plate, a plastic basket, an artificial grass or the like. Place or display plants or fresh food directly or indirectly on display shelves. The display shelf may have a structure having a large number of through-holes such as punching metal and expanded metal, a plate shape, a corrugated shape, a net shape, or a structure having irregularities on the plate.

  The connection between the electrostatic field generating transformer and the display shelf is preferably attached and removed so that the display shelf can be easily cleaned and repositioned, and may be lifted and lowered electrically. Further, by not providing a special connection portion on the display shelf side, it is easy to clean and the cost is low. Examples of the connecting means include contact by hanging the application chain, pinching by a clip, contact and pinching by installing on an electrode, and the like.

When a person approaches the open showcase, it is dangerous if the power to the display shelf is not cut off, so a human body detection device such as an infrared sensor is provided to detect this. In the present invention, the LED illumination is switched at the same time so that the operation can be visually confirmed as the human body detection device cuts off the power to the display shelf. When an electrostatic field is generated, the colored LED is turned on, and when the person approaches, the white LED is switched to determine that the human body detection device operates normally and the power to the display shelf is cut off, ensuring safety. And can bring a sense of security. Moreover, the display object can be seen with a natural color by switching to white LED.

  The open showcase according to the present invention has an electrostatic field that requires a high voltage by ensuring a more secure safety on the open showcase that can freely approach and touch the display, and it can be used for a long time. This makes it possible to maintain the freshness of the displayed items.

In particular, as a means for improving safety, the human body detection device cuts off the power supply to the display shelf and switches the illumination from the colored LED to the white LED, thereby providing a sense of security. Thereby, not only the freshness maintenance of a display thing is improved, but the display effect by switching of LED lighting also increases, and the appeal effect as a showcase can be improved further.

The present invention provides an open showcase with a human body detection device that shuts off the power of the electrostatic field generating transformer when a human body approaches the display device and switches a colored LED to a white LED as an illumination device of the display device. As a result, the above problems have been solved.

  1A and 1B show an embodiment of an open showcase 1 according to the present invention, which is a display device in which a display shelf 3 is provided by opening the front surface of a showcase body 2. As shown in FIG. 2, the open showcase 1 includes a refrigerator 21 and an electrostatic field generating transformer 22 at the base of the showcase main body 2, and the display space 3 is cooled and each display shelf 3 is connected to the electrostatic field generating transformer 22. To form an electrostatic field in the display space. In the open showcase 1 of this example, since a voltage of about 7000 V is applied at the maximum, the wall surface of the showcase body 2 is constituted by a resin panel for insulation. The display shelf 3 to be fixed to the bottom is installed through a lever 31.

  The display shelf 3 is formed of a stainless steel punching plate as shown in FIG. 3, and hooks 32 provided at both ends of the display shelf 3 are locked at arbitrary positions on the rail 23 arranged on the back surface of the showcase body 2. To do. The display shelf 3 and the electrostatic field generating transformer 22 are connected via a rail 23. The display shelf 3 of this example is provided with LED lighting 5 and supplies power through a rail 23.

  A circuit diagram for connecting the electrostatic field generating transformer 22 to the rail 23 is shown in FIG. This circuit diagram is an example in which an overcurrent detection device 24 is connected to the electrostatic field generating transformer 22, and by performing high voltage spark detection, high voltage leakage detection, and high voltage short circuit detection, the electrostatic field generating transformer is instantaneously interrupted, We are trying to improve safety.

  In the open showcase 1, when a display object is placed on the display shelf 3 and displayed in an electrostatic field atmosphere, the customer may approach the display case body 2 and touch the display object. A human body detection device 4 is provided in the case body 2. The human body detection device 4 of this example is an infrared sensor and is provided at four locations on the front side of the showcase body 2 to eliminate blind spots. In the present invention, the LED illumination 5 of the showcase body 2 is switched from the colored LED to the white LED in accordance with the interruption of the electrostatic field generating transformer 22 by the human body detection device 4. As a result, the customer himself / herself approaching the showcase body 2 can visually confirm that the electrostatic field generating transformer 22 is blocked, and can approach or touch the display object with peace of mind. In addition, the actual color of the display can be confirmed by switching to the white LED.

When displaying houseplants P placed in pots as shown in this example, illumination with red LEDs is effective in promoting germination, formation and leaf development, and illumination with blue LEDs is effective for plant growth. Since it has a suppressive action, it may be switched according to the state of the plant to be displayed. Further, by illuminating with colored LEDs such as red and blue, there is an advantage that the effect of attracting customers is enhanced. As shown in FIG. 1A, the showcase body 2 includes a main switch 25 of the electrostatic field generating transformer 22, an ON display lamp 26, an OFF display lamp 27, and an abnormality alarm lamp 28 at the lower front portion. The LED illumination changeover switch 51 and the LED illuminance controller 52 are provided. In addition, a shelf lifting controller 33 for electrically lifting the display shelf 3, a digital thermometer 6, a digital hygrometer 7, a display 8 for displaying “today's recommendation”, a network for remotely monitoring A camera 9 is provided.

In the open showcase 1 equipped with the electrostatic field generating transformer 22 and the refrigerator 21, the electric field leakage prevention and the cooling efficiency are improved by covering with the shield cover 10 as shown in FIG. Can do. The shield cover 10 is in the form of a sheet coated with an insulating paint, and can be stored in the upper part of the showcase body 2 as a roll. The shield cover 10 may be automatically opened and closed at a time set by timer control.

In the case of an open showcase 1 displaying houseplants P and the like, an automatic humidifier 11 is provided as shown in FIGS. 7 (a) and 7 (b), and the mist M is detected periodically or by detecting the wet state with the humidity sensor 12. Spray. A plurality of mist outlets 13 are provided on the back, side, and ceiling of the showcase body 2. By providing a plurality of humidity sensors 12, it is possible to partially humidify as shown in FIG.

Water used for the fine mist M is reused from the refrigerator 21 as shown in FIG. 9, and a drain pipe 14 that collects drain water and condensed water is connected to the tank 15. The tank 15 is provided with a water level sensor 16 to supply tap water when the amount of water is insufficient. In this example, the tank 15 is made of metal, and the electrostatic field generating transformer 22 applies a high electric field to activate the water in the tank 15.

An example of the open showcase which concerns on this invention is shown, (a) is a front view, (b) is a side view. Example 1 It is a bottom view of the open showcase shown in FIG. It is a perspective view which shows one Example of a display shelf. It is a circuit diagram of an electrostatic field generating transformer and an overcurrent detection device connected to the same. It is a perspective view which shows the detection range of the human body by the human body detection apparatus provided in the showcase main body. It is a perspective view which shows the state which provided the shield cover in the showcase main body. (Example 2) An example of the open showcase which provided the automatic humidifier is shown, (a) is a front view, (b) is a side view. (Example 3) It is a perspective view which shows the state which partially humidifies the plant displayed in the open showcase which concerns on this invention with an automatic humidifier. It is a side view which shows the other Example of an automatic humidifier. (Example 4)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Open showcase 2 Showcase main body 21 Refrigerator 22 Electrostatic field generating transformer 23 Rail 24 Overcurrent detection device 25 Main switch 26 ON display lamp 27 OFF display lamp 28 Abnormal alarm lamp 3 Display shelf 31 Insulator 32 Hook 33 Shelf lift controller 4 Human body detection device 5 LED illumination 51 LED changeover switch 52 LED illuminance controller 6 Digital thermometer 7 Digital hygrometer 8 Display 9 Network camera 10 Shield cover 11 Automatic humidifier 12 Humidity sensor 13 Mist outlet 14 Drain pipe 15 Tank 16 Water level sensor P Houseplant M Mist

Claims (4)

  A display device comprising a conductive display shelf that is open to the front and connected to a refrigerator and an electrostatic field generating transformer for the purpose of maintaining quality and selling the display, and when the human body approaches the display device, the electrostatic field generating transformer An open showcase characterized in that a human body detecting device for switching a colored LED to a white LED is provided as an illumination device for the display device.   2. The open showcase according to claim 1, wherein the colored LEDs are a blue LED and a red LED for promoting and suppressing the growth of plants displayed on the display shelf, and an LED illumination switching switch for switching between these is provided.   The open showcase according to claim 1, wherein the display device is provided with a shield cover that covers the opened front side and has insulating properties.   2. The open showcase according to claim 1, wherein the display device is provided with an automatic humidifying device for spraying mist in the display space, wherein a water tank for mist is connected to an electrostatic field generating transformer.

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