JP3043145B2 - Low temperature showcase alarm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-temperature showcase alarm device for detecting a temperature of a low-temperature showcase for cooling and selling foods or the like or an abnormality of a refrigerating device and issuing an alarm. .

[0002]

2. Description of the Related Art In such a low-temperature showcase, various abnormalities occur during use. Examples of these abnormalities include an increase in the internal temperature of the refrigerator, supercooling, and a high-pressure abnormality caused by clogging of a condenser of the refrigeration system. Conventionally, in regard to these abnormalities, an alarm was activated by using the output of a single relay contact or the like, and an alarm was issued outside the low-temperature showcase to notify the occurrence of the abnormality.

[0003]

However, in the conventional alarm device, since the same alarm is issued regardless of the content of the abnormality, the importance of the abnormality cannot be confirmed without actually going to the low-temperature showcase and investigating. For example, if the temperature rises due to poor cooling air circulation due to overloading of products, it can be easily dealt with by a store clerk. And cannot take appropriate measures.

[0004] Therefore, in the past, after a warning was issued, a store clerk checked the situation, judged that it could not be dealt with, and then contacted a service contractor or the like with a maintenance contract to call a technician. It takes a long time from the occurrence of the abnormality to the start of the treatment, and there is a problem in that the frozen food is melted and inconveniences such as deterioration of the stored food occur.

The present invention has been made to solve the above-mentioned conventional technical problem, and has as its object to provide an alarm device for selecting a destination of an alarm according to the content of an abnormality in a low-temperature showcase. .

[0006]

An alarm device 2 for a low-temperature showcase 1 according to the present invention is provided in the low-temperature showcase 1;
Controller 5 for detecting abnormal data of low-temperature showcase 1
And an alarm unit 3 for collecting abnormal data from the control unit 5 via a communication line. The alarm unit 3 discriminates abnormal data from the control unit 5,
Alarms are issued only inside the store, and abnormalities with high importance are added to the store.
It is configured to notify the outside .

[0007] The alarm device 2 of the low-temperature showcase 1 of the present invention.
Identifies abnormal data, and anomalies with low importance
Alarms, and abnormalities with high importance
Department so that abnormalities with low importance
Alerts employees, and compares high-priority abnormalities to those
Directly to a service contractor with a maintenance contract
An alarm can be issued.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of an alarm device 2 of a low-temperature showcase 1 of the present invention, and FIG. 2 is a flowchart showing a program of a microcomputer 4 constituting the alarm unit 3.

A plurality of low-temperature showcases 1 are installed in a store such as a supermarket, and each has a control unit 5 and a freezing device (not shown). The output line 7 of the temperature detecting device 6 for detecting the temperature of the condenser is connected to the control unit 5.
, A control signal line 8 is connected to the refrigeration system. Each control unit 5 is connected to a communication driver 11 of the alarm unit 3 by a communication cable 10.

The alarm unit 3 is installed in, for example, a security room or facility management room of the store, and includes a general-purpose microcomputer 4, a communication driver 11, a keyboard 12, a display 14, an alarm lamp 15 including a plurality of LEDs, and a plurality of external alarms. It comprises an output unit 16, 17, 18, an external alarm serial output unit 19, and a power supply unit 20,
The output of the communication driver 11 and the keyboard 12 is input to the microcomputer 4, and the display 14, the alarm lamp 1
5. The external alarm output units 16, 17, 18 and the external alarm serial output unit 19 are connected.

The external alarm output unit 16 has an alarm buzzer 22 and an alarm lamp 23 installed in a backyard of a store, for example.
Are connected to the external alarm output unit 17, and an alarm buzzer 24 and an alarm lamp 25 installed in the store are connected. The external alarm serial output unit 19 is connected to a modem 27. The modem 27 is connected, for example, via a telephone line 28 and a modem 29 to a reception controller 30 installed at a sales office of a service contractor whose store has a maintenance contract. I have.

Next, the operation will be described. From the keyboard 12, the internal temperature of the low-temperature showcase 1 and the high-temperature alarm temperature,
The low-temperature alarm temperature is set, and the set value is transmitted from the microcomputer 4 to each control unit 5 via the communication driver 11 and the communication cable 10, and the control unit 5 holds this. In addition, even if it does not have such a structure, the control part 5 may be provided with the setting means which sets the inside temperature of a store | warehouse | chamber, and sets a high-temperature alarm temperature and a low-temperature alarm temperature, respectively. On the other hand, the internal temperature detected by the temperature detection device 6 is input to the control unit 5 from the output line 7, and the control unit 5 compares each set value of the high temperature alarm temperature and the low temperature alarm temperature with the output of the temperature detection device 6. The output corresponding to the difference is output to the microcomputer 4 by the communication cable 10. Further, the temperature of the condenser of the refrigerating device detected by the temperature detecting device 6 is also input to the control unit 5, and is similarly output to the microcomputer 4 via the communication cable 10.

Note that the control unit 5 includes, in addition to these communication controls,
An output is generated from the control signal line 8 based on the internal temperature based on the output of the temperature detecting device 6 and the internal temperature previously set by the keyboard 12 or the like, and the low-temperature showcase 1 is generated.
Of the low-temperature showcase 1 is controlled to a set value.

Next, the operation of the alarm unit 3 will be described with reference to the flowchart of FIG. For example, when the cool air ventilation passage is blocked by a product stored in the refrigerator of the low-temperature showcase 1 and the temperature of the refrigerator in the low-temperature showcase 1 becomes slightly higher than the high-temperature alarm temperature, the output corresponding to the difference is regarded as abnormal data. The signal is transmitted from the control unit 5 to the microcomputer 4 of the alarm unit 3 via the communication cable 10. The microcomputer 4 discriminates the abnormal data, and if the temperature difference is small, the process proceeds from step S1 to step S2, where the external alarm output unit 16 drives the alarm buzzer 22 and the alarm lamp 23 installed in the backyard of the store, Alert the clerk in the backyard. As a result, the clerk notices the abnormality of the low-temperature showcase 1 and can deal with it by rearranging the products. In this case, the microcomputer 4 displays a high temperature alarm on the display 14 and an alarm system on the alarm lamp 15.

Next, when the temperature in the refrigerator rises sharply due to the failure of the refrigeration system of the low-temperature showcase 1 or peripheral equipment and rises significantly above the high-temperature alarm temperature, an output corresponding to the difference is similarly transmitted as abnormal data. The signal is transmitted from the control unit 5 to the microcomputer 4 of the alarm unit 3 via the cable 10. The microcomputer 4 discriminates the abnormal data, and if the temperature difference is large, the process proceeds from step S3 to step S7, where the external alarm serial output unit 19 outputs the data of the service contractor via the modem 27, the telephone line 28 and the modem 29. It notifies the reception controller 30 and issues an alarm. As a result, the technician of the service contractor can quickly recognize the failure of the low-temperature showcase 1 of the contracted store and can rush to repair, realizing quick repair and preventing deterioration of stored products. it can. Also in this case, the microcomputer 4 displays a high temperature alarm on the display 14 and an alarm system on the alarm lamp 15.

Further, when the temperature inside the refrigerator cannot be considered as normal, for example, when the temperature becomes abnormally high such as + 80 ° C., the low-temperature showcase 1 may be burned. Such abnormal data is similarly transmitted from the control unit 5 to the microcomputer 4 of the alarm unit 3. The microcomputer 4 discriminates this abnormal data, and if the abnormal temperature is high, the microcomputer 4 proceeds to step S
The process proceeds from step 4 to step S5, in which the alarm buzzer 24 and the alarm lamp 25 installed in the store are driven by the external alarm output unit 17 to warn the customers around the low-temperature showcase 1 that there is danger and to secure the safety. . Also in this case, the microcomputer 4 displays a high-temperature alarm on the display 14 and an alarm system on the alarm lamp 15, so that the security officer can take a subsequent action.

Next, when the temperature on the high pressure side rises abnormally due to clogging of the condenser of the refrigerating device of the low-temperature showcase 1, the microcomputer of the alarm unit 3 is transmitted from the control unit 5 by the communication cable 10 as abnormal data. 4 is sent. The microcomputer 4 discriminates this abnormal data, and in the case of a high-pressure abnormality, from step S6 to step S7.
In the same manner as described above, the external alarm serial output unit 19 notifies the reception controller 30 of the service construction company via the modem 27, the telephone line 28 and the modem 29 to issue an alarm. In this way, it is also possible to realize quick repair by a service engineer's technician and prevent the stored goods from deteriorating. In this case as well, the microcomputer 4 displays the high-pressure abnormality on the display 14 and the alarm system on the alarm lamp 15, so that the store can confirm the contents of the abnormality and the destination of the alarm.

When the low-temperature showcase 1 is in a supercooled state, a report destination is similarly selected according to the degree of the temperature difference from the low-temperature alarm temperature. In addition, the set value and the internal temperature were compared by the control unit 5, but the comparison is not limited thereto.
Is the data such as the temperature inside the chamber
May be transmitted only to the microcomputer 4, and the microcomputer 4 may compare with the set value.

[0019]

According to the low-temperature showcase alarm device of the present invention, abnormal data is discriminated , and abnormalities of low importance are determined by the store.
Alarms are issued only inside the store, and abnormalities with high importance are added to the store.
Alerts to the outside world, so that abnormalities of low importance
Alerts only clerks in the store,
To issue an alarm directly to an external service contractor, for example
And so on, and it is possible to realize a quick and accurate countermeasure against an abnormality such as a failure of the low-temperature showcase.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a low-temperature showcase alarm device.

FIG. 2 is a flowchart showing a program of a microcomputer of an alarm unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-temperature showcase 2 Alarm device 3 Alarm part 4 Microcomputer 5 Control part 6 Temperature detection device 22 Alarm buzzer 30 Reception controller

Claims (1)

(57) [Claims] 1. A low-temperature showcase, comprising: a control unit for detecting abnormal data of the low-temperature showcase; and an alarm unit for collecting the abnormal data from the control unit via a communication line. abnormal data from the control unit
Judgment, low-priority abnormalities will only alert inside the store,
High abnormal importance alarm device of the low-temperature showcase, wherein the this <br/> of reporting to the outside, in addition to the store.