JPS6041854A - Automatic temperature control system - Google Patents

Abstract

PURPOSE:To prevent temperature rise in an exchange without a large sized device and increase of the cost by stopping a current supply to a line circuit of a prescribed condition when the temperature of the exchange reaches a prescribed value. CONSTITUTION:When a temperature sensor circuit 41 reaches a prescribed temperature, it is detected by the scanning of a CPU2. Then the CPU2 detects that a line circuit group LCG1 reaches a control temperature, selects line circuits 51-5m to which subscribers with less importance in the group LCG1 are connected and informs the selection to a power supply device 3. Since the power supply device 3 stops the current supply to the said line circuit, the said subscriber is brought into the line lockout state, the talking state of the telephone set is disabled but the temperature rise in the exchange 1 is blocked.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic temperature control system, and more particularly to an automatic temperature control system for electronic automatic exchanges.

Generally, in an electronic automatic switching machine, internal temperature increases due to circuit operation, etc., which causes malfunction of each switching device. Conventionally,
This type of temperature control method includes reducing the temperature rise by lowering the mounting density of line circuits in the exchange equipment, or by using an air-cooled temperature control method to diffuse heat using a fan, etc., or by using running water. A water-cooled temperature control method that performs diffusion is common. However, such a temperature control method has disadvantages such as an increase in the size of the device due to a decrease in packaging density, and an increase in cost due to the addition of a new cooling device.

In view of the above-mentioned drawbacks of the conventional example, an object of the present invention is to identify and select a line circuit according to predetermined conditions and stop the current supply when the electronic automatic switching equipment reaches a predetermined temperature, thereby controlling the temperature within the automatic switching equipment. The object of the present invention is to provide a temperature control method that prevents the temperature from rising.

The automatic temperature control system according to the present invention includes a temperature detection means connected to a central control device of an automatic exchange, and also includes a power supply device for a plurality of line circuits, and detects when the inside of the exchange has reached a predetermined temperature or higher. When the temperature detection means detects the temperature, the central control unit identifies the class and call status of the subscriber telephone connected to the line circuit, and controls the power supply unit to stop supplying current to the identified line circuit. The present invention is characterized in that temperature rise in the exchange is prevented by temporarily stopping incoming and outgoing calls from subscriber telephones of the line circuit.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram for controlling the temperature of an electronic automatic switching machine.

Groups of multiple line circuits LCGI, LOG2, ・
Each of ... is a plurality of line circuits (LC) 51
r 52~5m+ 61.62~6n, -'-'-
consisting of groups LCGI, LCG2.・・・・・・
Temperature sensor circuits (T8) 41, 42 . each have a temperature sensor that detects the temperature for each group.・
...is placed. Temperature sensor circuit 41, 4
2. -... is configured such that when the temperature sensor detects a temperature lower than a predetermined temperature, it does not generate a signal, but when it detects the temperature of the predetermined temperature tool, it generates a logic "1 level signal" Temperature sensor circuit 41.4
The outputs of 2... are connected to a central control unit (hereinafter referred to as CPU) 2, and are also connected to line circuits 51, 52 to 5.
m, 61.62 to 6 m, . . . are connected to a CPU 2 which identifies the call/non-call state of the line circuit and the importance level of the subscriber telephone, which will be described later.

The output of the CPU 2 is connected to a power supply device (POW) 3, and the power supply device 3 is connected to a line circuit 51, 5: 2-5m, 61
.

62 to 60 are independently connected to each other.

Here, line circuit 51.52~5m, 61y62~6
m, .
The CPU 2 can detect the call status of subscriber telephones in each line circuit.

Next, the operation of the above embodiment will be explained. For example, when the sensor of the temperature sensor circuit 41 detects that the temperature has risen to a predetermined temperature, the temperature centimeter circuit 41 outputs an 11° signal. This output signal causes a forced interrupt to CPU2,
Or 1icPU2 connects the temperature sensor circuit 41 at regular intervals.
．． 42, etc., and the CPU 2 is notified. This notification to the CPU 2 is sent to a specific location in the electronic automatic switchboard 1, in this case the line circuit group LCG.
I has reached the limit temperature, which means that the limit that guarantees the normal operation of the exchange 1 has been reached. Accordingly, the CPU 2 determines based on the notification from the sensor circuit 41 that the line circuit group LCGI in the exchange 1 has reached the control temperature.

Here, the importance of the subscriber telephones accommodated in the exchange 1 is not uniform, and each class (for example, % special grade).

Classified as Semi-Special A, A, Semi-A, Otsu, etc.). Therefore, the CPU 2 determines the importance of the subscriber telephones connected within the group LCGt based on the class.1 At least one of the line circuits (51 to 5 m) to which the subscriber telephones of low severity (for example, O class) are connected Select one.

On the other hand, the CPU 2 monitors calls to see whether each line circuit is in use or not, and accordingly, the CPU 2 issues a command to the power supply device 3 for all of the selected line circuits except the line circuit in use. Upon receiving this command, the power supply device 3 stops supplying current to the line circuit. After the line circuit during the call ends, the CPU 2 instructs the power supply device 3 to stop supplying current to the line circuit. The subscriber telephone of the line circuit whose power supply is stopped in this way is placed in a line lockout state and removed from the system of the exchange 1, and the telephone becomes unable to make a call, thereby preventing the temperature inside the exchange 1 from rising.

Next, as mentioned above, when the temperature rise inside the exchanger is prevented and the temperature drops below a predetermined level due to natural cooling, etc., the sensor circuit 4
The temperature sensor 1 detects this, the output of the sensor circuit 41 changes from 111 to 101, and the CPU 2 is notified in the same manner as in the case of the temperature rise described above. The CPU 2 instructs the power supply device 3 to restart the current supply to the line circuit from which the current supply has been stopped, and the subscriber telephone is therefore released from the line lockout state and incorporated into the system of the exchange 1. Note that when the current supply is restarted, the identification of the subscriber's telephone class and the call state, which were performed by the CPU 2 when the current supply was stopped, is unnecessary.

As explained above, according to the present invention, when the temperature inside an automatic exchange increases, the current supply to a specific line circuit is stopped to prevent the temperature from rising, thereby maintaining normal operation of the exchange. Can be done.

[Brief explanation of drawings]

The figure is a configuration diagram of an embodiment of the present invention. 1...Electronic automatic switchboard, 2...Central control unit (CPU), 3...Power supply device (pow
), 41°42...Temperature sensor circuit (TS),
51.52~5m, 61.62~6n...Lan'i circuit (LC).

Claims (1)

[Claims] A temperature detection means connected to a central control device of the automatic exchange is provided in the automatic exchange, and a power supply device for a plurality of line circuits is provided, and the temperature detection means detects that the temperature inside the exchange is higher than a predetermined temperature. Then, the central control unit identifies the class and call state tL of the subscriber telephone connected to the line circuit group, controls the power supply unit to stop supplying current to the identified line circuit, and disconnects the line. An automatic temperature control system characterized in that temperature rise in the exchange is prevented by temporarily stopping incoming and outgoing calls from subscriber telephones in the circuit.