JPH02216947A - Cooling system for subscriber module - Google Patents

Abstract

PURPOSE:To effectively cool a subscriber module by providing a detecting/ counting means and performing the start/stop control of a cooling device based on the sum total of calling/answering frequencies of subscribers. CONSTITUTION:A counting means 2 is provided to detect and count the calls and answers of subscribers together with a cooling device 4 which cools the subscriber circuits 1a-1m, and a control circuit 3 which stores previously the threshold value information which starts the device 4 and the threshold value information which stops the device 4. The circuit 3 controls the start and the stop of the device 4 based on the sum total of calling/answering frequencies counted by the means 2 and the stored threshold value information. Thus the device 4 is not required to always work and therefore the economy the device 4 is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cooling method for a subscriber circuit mounting module of an exchange.

[Conventional technology]

Conventionally, the cooling method for this type of subscriber circuit module was to place a cooling device such as a cooling fan near the subscriber circuit module and operate it at all times to cool the module. Ta.

[Problem to be solved by the invention]

In the conventional cooling system described above, the heat generated by the subscriber circuit fluctuates depending on the call current, relay operation, etc., but the cooling system constantly operates even when there are few calls and responses and there is no need for cooling. Therefore, it has the disadvantage of being inefficient and uneconomical.

[Means to solve the problem]

The present invention provides a subscriber module cooling system for cooling subscriber circuits mounted thereon, including a counting means for detecting and counting subscriber calls and responses, a cooling device for cooling the subscriber circuit, and a cooling device that cools the subscriber circuit in advance. a control circuit in which threshold information for starting and threshold information for stopping the cooling device is stored, and the control circuit stores the total number of calls and responses by the counting means and the threshold information stored The cooling device is characterized in that starting and stopping of the cooling device is controlled based on the following.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a circuit diagram showing an embodiment of the present invention in the case of a module equipped with m subscriber circuits.

In this embodiment, the subscriber circuits 1a and lb mounted on the module
, ..., 1m, includes a detection circuit 2 that detects and counts calls and responses from each subscriber's line scanning signal, and a cooling circuit that cools subscriber circuits 1a, lb, ..., 1m. The cooling device 4 includes a device 4 and a control circuit 3 in which threshold information for starting the cooling device 4 and threshold information for stopping the cooling device 4 are stored in advance and controls starting and stopping of the cooling device 4. Note that in the figure, arrows indicate the flow of signals.

In this embodiment having such a configuration, the detection circuit 2 detects each call and response from the line scanning signals of each subscriber circuit la, lb, . . . , 1m, and counts the total number of calls and responses. When the total number of calls and responses by the detection circuit 2 increases beyond the stored activation threshold, the control circuit 3 activates the cooling device 4 to operate the subscriber circuits 1a, lb, . . . , 1m. Cooling. Further, if the total number determined by the detection circuit 2 decreases below the stored stop threshold, the cooling device 4 is stopped.

〔Effect of the invention〕

As explained above, the present invention is capable of controlling the start and stop of the cooling device based on the total number of subscriber calls and responses by providing a detection and counting means, thereby increasing the temperature of the module to be cooled. By changing the memorized start and stop thresholds according to the situation, efficient cooling can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention. la, lb, ~, 1m...Subscriber circuit, 2...Detection circuit, 3...Control circuit, 4...Cooling device.

Claims (1)

[Claims] A subscriber module cooling method for cooling a subscriber circuit installed therein includes a counting means for detecting and counting subscriber calls and responses, a cooling device for cooling the subscriber circuit, and a device for starting the cooling device in advance. a control circuit in which threshold information and threshold information for stopping the cooling device are stored; A subscriber module cooling system characterized in that starting and stopping of the cooling device is controlled.