JPH05322404A - Centralized control device for shocase - Google Patents

Abstract

PURPOSE:To make a complex wiring unnecessary in a device for collective control of a plurality of showcases by a method wherein a centralizing device and each showcase are provided with a radio transmitter and receiver, so that transfer of the data therebetween is effected in a wireless manner. CONSTITUTION:At a store such as supermarket where a plurality of refrigerated showcases 1 are installed on the floor, a centralizing device 2 is provided at one of the corners thereof to collectively control each of the showcases 1. Each showcase 1 and the centralizing device 2 are provided with a radio transmitter and receiver 3 for transfer of information therebetween, whereby the predetermined data for controlling cooling air outlet temperature, defrosting starting time, return temperature, etc., are transmitted from the centralizing device 2 through a radio wave in the store to each showcase 1. The data on the temperature of each place detected by a sensor is transmitted from each showcase 1 to the centralizing device 2, which then displays the received data on an indicator and gives an alarm as required.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a showcase centralized management device for collectively managing a plurality of frozen / refrigerated showcases by a center device.

[0002]

2. Description of the Related Art For a plurality of showcases installed in a supermarket or the like, control data such as target temperature, defrost start time and return temperature, and on / off time of fluorescent lamps in a warehouse are transmitted from a center device. There is known a centralized management device that sets the settings, transmits management data from each showcase, displays the management data on the center device, and issues an alarm (for example, see Japanese Patent Laid-Open No. 1-291085).

[0003]

However, since the conventional centralized control device exchanges information between the showcase and the center device by wire, installation work of electric wires is required, and high temperature and high humidity are required. There was a problem that the information transmission was adversely affected under the bad condition of. Therefore, an object of the present invention is to provide a centralized management device for a showcase that solves such a problem.

[0004]

According to the present invention, a center device and a showcase are provided with wireless transceivers, respectively, and data is exchanged between them wirelessly. In that case, several showcases are connected by wire within a range that does not require electric wire laying work,
If a wireless transceiver is installed in each of these groups, the equipment cost will be low.

[0005]

Since information is transmitted wirelessly between the showcase and the center device, the work of burying electric wires is unnecessary.
In particular, even in the case of transmitting information to another floor, if there is a sufficient transmission output, complicated wiring work can be omitted, and it becomes possible to easily control a large number of showcases and monitor the operating state at one place. In addition, if several showcases are set as one group and one transceiver is installed therein, the cost can be reduced as compared with the case where the transceivers are individually attached to each showcase.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a store layout diagram showing an embodiment of the present invention. In the figure, a plurality of showcases 1 are arranged on the floor of a store such as a supermarket, and a center device 2 for collectively managing these is provided in one corner of the store. The showcase 1 and the center device 2 are provided with a wireless transceiver 3 for transmitting information between them.

Therefore, from the center device 2, the radio transmitter / receiver 3 controls the temperature of the cold air outlet, the defrost start time and the return temperature, the on / off time of the in-compartment fluorescent lamp, etc. in each showcase 1 via the in-store radio waves. Setting data is transmitted, and the controller (not shown) of each showcase 1 controls the inside of the refrigerator based on these data. In addition, from each showcase 1, similarly, data regarding the temperature (internal temperature, evaporator temperature, outside air temperature, etc.) and operating conditions (temperature control operation, defrosting operation, alarm output, etc.) of each location detected by the sensor are provided. It is transmitted to the center device 2 as management data. The center device 2 displays these data on a display and issues an alarm if necessary.

FIG. 2 is a layout diagram showing an embodiment in which the showcases 1 are divided into groups and one radio transceiver is installed in each group. Showcase 1 as shown
The wireless transceiver 3 is attached to one of the two showcases 1, and each of the showcases 1 and the other showcases 1 is connected by a wire 4. In this way, if the showcases 1 are divided into groups and one wireless transceiver 3 is installed for each group, the number of wireless transceivers 3 is reduced and the cost is reduced.

[0009]

According to the present invention, by transmitting information wirelessly between a plurality of showcases and a center device that collectively manages these, no complicated wiring work is required, and a drain is provided. Stable transmission / reception is possible without being affected by humidity and humidity.

[Brief description of drawings]

FIG. 1 is a layout diagram in a store according to an embodiment of the present invention.

FIG. 2 is an in-store layout diagram of another embodiment of the present invention.

[Explanation of symbols]

 1 Showcase 2 Center device 3 Radio transmitter / receiver 4 Wiring

Claims (1)

[Claims] 1. A center device for collectively managing a plurality of showcases, wherein the center device transmits control data to the showcase, while the center device receives management data from the showcase. A centralized management device for a showcase, characterized in that, in the centralized management device for a showcase, a wireless transceiver is provided in each of the center device and the showcase, and data is exchanged between them wirelessly.