JPH10240302A - Temperature/power source monitoring device for thermostatic chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To monitor a temperature inside a thermostatic chamber even during a power interruption and to minimize the rise of the temperature inside the container by providing the device with a chamber temperature detection means, a power interruption detection means, an alarm issuing means by the detection signals of one of them and the means for transmitting alarm signals to an external equipment. SOLUTION: A CPU 6 incorporates an A/D converter, measures the stabilized voltage 7 of a circuit 2, and when it becomes less than a prescribed voltage, issues power interruption or voltage drop signals and reports that the power source state of the thermostatic chamber is not good. Similarly, when the voltage of a chamber temperature measurement sensor 9 becomes less than prescribed, it is reported that it is an alarm temperature. Thus, when the power interruption or voltage drop signals are issued, even when the inside of the chamber does not reach the alarm temperature, report signals are issued. The reporting means, that are the means for both of power interruption reporting and alarm temperature reporting, are a digital communication means 8 for performing transmission to the external equipment, a built-in alarm lamp 10 and a buzzer 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature in a refrigerator and a power supply in a device such as a cool box, a freezer, a culture device, etc., capable of maintaining and controlling the internal temperature at a constant level (hereinafter referred to as a constant temperature cabinet). And a device for monitoring the

[0002]

2. Description of the Related Art Conventionally, as a temperature monitoring device for a refrigerator or the like,
2. Description of the Related Art There is known an apparatus in which a temperature measuring device operated by an AC power supply or a battery is connected to a computer, and a temperature alarm is issued by processing of the computer.

[0003]

The above-mentioned temperature monitoring device, in which the temperature measuring device is operated by an AC power supply, cannot measure during a power failure, and records a change in temperature change of a cool box or the like during that time. You can't do that. In the case where the temperature measuring device is operated by a battery, the temperature can be recorded even during a power failure, but it cannot be detected that a power failure has occurred. The response is delayed without noticing the abnormality. Further, if a power failure occurs or a computer malfunctions, the measurement data of the temperature monitoring device is not transmitted to the computer, and a temperature alarm cannot be issued.

The present invention makes it possible to monitor the temperature in a thermostatic chamber even during a power outage, to notify the occurrence of the power outage, and to minimize a rise in the temperature inside the chamber. The purpose is.

[0005]

The temperature power supply monitoring device in the constant temperature storage according to the present invention comprises: means for switching from an AC power supply to a DC power supply at the time of a power failure; a temperature detection means in the refrigerator; and a power failure detection means. It comprises means 10 and 11 for issuing an alarm by a detection signal, and means 8 for sending an alarm signal to an external device 13.

A means for storing alarm temperature data transmitted from the external device 13 is provided.

An identification number setting means is provided so that a plurality of temperature power monitoring devices 1 can be connected to one external device 13.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference to FIGS. 1 to 3, an embodiment of a temperature power supply monitoring device in a thermostatic oven according to the present invention will be described.

The temperature power supply monitoring device 1 comprises an AC / DC switching means 4, a temperature detecting means 9 inside a refrigerator, and a power failure detecting means (CP
U / A converter), and each means 10 for issuing an alarm (temperature alarm or power failure alarm) by any of the detection signals,
11 and means 8 for transmitting an alarm signal to the external device 13 as a digital signal.

FIG. 1 is a block circuit diagram of a temperature power supply monitoring apparatus 1. The circuit 2 converts an alternating current into an insulated rectified and smoothed and converted into an unstabilized direct current, a battery 3 as a direct current power supply, and an alternating current direct current switching means. A certain relay 4, a stabilized power supply IC 5, a central processing unit (CPU) 6, a digital communication means 8 as a means for transmitting an alarm signal, a temperature measuring sensor 9 as a temperature detecting means in the refrigerator, an alarm lamp 10 as an alarm generating means, It is composed of a buzzer 11 and the like.

The AC / DC switching means 4 is a relay which opens and closes a section by an electromagnet, and is a means for switching from an AC power supply to a DC power supply in the event of a power failure, as will be described later.

The temperature measuring sensor 9 detects whether or not the temperature in the thermostatic chamber 14 has become an alarm temperature, that is, whether the altitude is, for example, 5 ° C., and the measuring hole 14 a provided in the thermostatic chamber 14. Installed more inside.

In the circuit shown in FIG. 1, when the supplied alternating current flows from the circuit 2 to the relay 4, the section of the relay 4 is attracted to the alternating current side by the internal electromagnet, and the stabilized power IC
5 is input. The current whose voltage has been stabilized by the stabilized power supply IC 5 is supplied to the CPU 6.

When the alternating current supplied to the circuit 2 stops, the intercept of the relay 4 moves to the direct current side and the alternating current side is turned off. Therefore, the battery 3 is connected to the stabilized power supply IC 5, and a direct current is supplied to the CPU 6. The battery 3 is preferably a rechargeable battery.

The CPU 6 has a built-in A / D converter. Here, the stabilized voltage 7 of the circuit 2 is measured. When the stabilized voltage 7 becomes equal to or lower than a predetermined voltage, a power failure or a voltage drop signal is issued to notify that the power supply state of the constant temperature chamber 14 is not good (AC power supply is It can be said that the power failure detecting means for detecting the power failure or the voltage drop is carried out by the A / D converter of the CPU 6). Similarly, when the voltage of the temperature measurement sensor 9 becomes equal to or lower than a predetermined value, it is notified that the temperature is the alarm temperature. Therefore, when a power failure or a voltage drop signal is issued, a notification signal is issued even if the inside of the refrigerator has not reached the alarm temperature.

These informing means, that is, means for performing both a power failure notification and an alarm temperature notification are provided by the external device 13 (the constant temperature storage 14).
A digital communication means 8, a built-in alarm lamp 10 and a buzzer 11 for transmission to a computer for controlling the temperature and the like. Transmission of an alarm signal (digital signal) between the digital communication means 8 and the external device 13 is performed by wire or wirelessly. Note that a stop switch for the buzzer sound may be provided.

When it is necessary to monitor a plurality of constant temperature chambers 14, each of the constant temperature chambers 14 and the temperature interruption monitor 1 are connected to the same AC power supply (outlet) 16 as shown in FIG. The temperature outage monitoring device 1 is connected to the line 11 and to the computer 13 via the device 12 for converting the rating of the electric wire. Reference numerals 15 and 17 denote power cords of the thermostatic chamber 14.

As described above, the plurality of temperature power monitoring devices 1 corresponding to the plurality of constant temperature chambers 14 are connected to one computer 13.
In order to be able to identify each of the temperature power monitoring devices 1, an identification number setting means (built-in dip switch) is provided in each of the temperature power monitoring devices 1. By setting the identification number, the computer 13 can make a transmission request to each of the temperature outage monitoring devices 1.

Further, the temperature power supply monitoring device 1 is provided with a storage means in the CPU 6 for storing alarm temperature data transmitted from the computer 13. Therefore, the line 11 connecting the temperature power supply monitoring device 1 and the computer 13
Are separated and disconnected due to, for example, a power failure, and the conversion device 1
2. Even if the computer 13 stops functioning, the built-in alarm generation means 10 and 11 can issue an alarm based on the data held in the storage means. In other words, as shown in FIG. 3, the temperature power supply monitoring device 1 can be used alone without being connected to a computer.

[0020]

Since the present invention is configured as described above, it has the following effects.

That is, since the power source is switched to the DC power source even during a power failure, the temperature in the constant temperature chamber can be monitored. Further, since the occurrence of the power failure is notified, it is possible to minimize the increase in the internal temperature of the refrigerator. Further, since the buzzer and the lamp are provided in the temperature power supply monitoring device itself, it is possible to notify the abnormal temperature even if a failure of the computer or the like occurs as in the related art.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram of a temperature power supply monitoring device according to the present invention.

FIG. 2 is a block diagram showing a connection state of each temperature outage monitoring device when managing a plurality of constant temperature chambers in the present invention.

FIG. 3 is a block diagram showing a connection state of a temperature outage monitoring device when one thermostatic chamber is managed in the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Temperature power monitoring device 3 DC power supply (battery) 4 AC / DC switching means (relay) 6 Central processing unit (CPU) 8 Alarm signal transmission means (digital communication means) 9 Internal temperature detection means (temperature sensor) 10 Alarm lamp 11 Buzzer 13 External device (computer)

Claims (3)

[Claims] 1. A means for switching from an AC power supply to a DC power supply at the time of a power outage, a temperature detection means in a refrigerator, a power outage detection means, a means for issuing an alarm based on any detection signal, and a means for transmitting an alarm signal to an external device And a temperature power supply monitoring device in a constant temperature chamber. 2. The temperature power supply monitoring device according to claim 1, further comprising means for storing alarm temperature data transmitted from an external device. 3. An apparatus according to claim 1, further comprising means for setting an identification number.
Or the temperature power supply monitoring device in the constant temperature chamber according to claim 2.