JP3131856B2 - Transmitter cooling system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling system for a transmitter, and more particularly to a cooling system for a broadcasting transmitter.

[0002]

2. Description of the Related Art Conventionally, this type of transmitter cooling system has a blower or an exhauster individually corresponding to each transmitter in the case of a plurality of transmitters.

FIG. 4 is a block diagram showing an example of a conventional cooling system for a transmitter. The transmitters 11a to 11c
It has a blower duct 12 and a blower 13 independently, and a transmitter start signal relay 1 for starting and stopping the corresponding blower 13 according to the start and stop of the transmitters 11a to 11c.
Control commands are output to the blower through 6a to 16c.

Next, the operation will be described. When one transmitter 11 is activated, the relay 16 of the transmitter 11 operates, and the corresponding blower 13 is activated. At this time, the blowers 13 corresponding to the other stopped transmitters 1 are stopped.

[0005]

The conventional cooling system for a transmitter requires a large installation space since the transmitters 11a to 11c are individually provided with air ducts and fans. In addition, when a plurality of transmitters are started simultaneously, a plurality of blowers are started simultaneously, so that a large starting current flows and an electric shock applied to the station power supply becomes large.

[0006] The above-mentioned problem has the same problem even if the blower is an exhaust fan.

Therefore, the present invention aims to reduce the number of blowers or exhaust fans and reduce the space occupied by the duct.

[0008]

In order to solve the above-mentioned problems, a cooling system for a transmitter according to the present invention is provided with a common blower or exhaust fan for a plurality of transmitters.
The number of blowers or exhaust fans is reduced by changing the rotation speed of the blowers or exhaust fans according to the number of transmitters activated by the inverter and changing the capacity. At the same time, the common use of ducts has reduced the space occupied by ducts in the office building.

[0009]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 1 shows an example having three transmitters 11a to 11c. Cooling air to each of the transmitters 11a to 11c is sent from a common blower 13 through a blow duct 12. Each of the transmitters 11a to 11a to 1
1c, the cooling air is blown to each of the transmitters 11a to 11c.
And a damper 14 for evenly distributing the
The air volume is adjusted according to the activation state of the transmitter 11 so that the air is not sent to the stopped transmitter 11. Now, the transmitter 11
When a is started, the relay 16a of the transmitter 11a operates and a start signal is transmitted to the inverter 15. Inverter 1
In the step 5, the blower 13 is supplied with electric power having a voltage and a frequency set so as to provide the blower 13 with an air volume and a rotational speed required to obtain a static pressure necessary for cooling one transmitter 11a.

At this time, the blower 13 is
The power supplied to the blower 13 gradually increases continuously until the set voltage and frequency are reached, thereby suppressing the sudden current caused by the activation of the blower 13. Subsequently, when the transmitter 11b is started, a start signal is transmitted from the relay 16b to the inverter 15 as in the case where the transmitter 11a is started, and
In step (2), power of a set voltage and frequency is supplied to the blower 13 so as to provide an air volume and a rotation speed sufficient to obtain a static pressure necessary for cooling the two transmitters. Similarly, the transmitters 11a to 11a
When all three 11c units are started, the inverter 15 supplies the blower 13 with electric power of a voltage and a frequency set so as to provide the fan 13 with an air volume required for cooling the three transmitters and a rotation speed capable of obtaining a static pressure. .

Here, when the blower 13 is started or when the number of revolutions is increased, the power supplied from the inverter 15 to the blower 13 always changes in voltage and frequency continuously, thereby suppressing the abrupt current of the blower 13.

FIG. 2 is a block diagram of one embodiment of the present invention.

FIG. 2 shows an example of a configuration in which one exhaust fan 18 is commonly used for three transmitters 11a to 11c.

Exhaust air exhausted from each of the transmitters 11a to 11c is collected in an exhaust duct 17 and guided to an exhaust fan 18. Now, when the transmitter 11a starts, the transmitter 11a
The start signal is transmitted to the inverter 15 from the relay 16a.

The inverter 15 supplies power to the exhaust fan 18 at a voltage and frequency set to give the number of rotations of the exhaust fan 18 according to a start signal input from each transmitter. That is, power of the set voltage and frequency is supplied from the inverter 15 to the exhaust fan 18 so that the exhaust capability corresponding to the number of activated transmitters is obtained. Here, the voltage and frequency supplied from the inverter 15 to the exhaust fan 18 change continuously until they reach the set values, and the exhaust fan 18 is started slowly, so that a sudden current does not flow. The exhaust duct 17 has a damper 14.
Is provided to prevent the exhaust air from the activated transmitter from flowing into the exhaust duct of the stopped transmitter.

FIG. 3 is a block diagram of one embodiment of the third aspect of the present invention.

FIG. 3 has both the blower and the exhaust fan described with reference to FIGS.

[0020]

As described above, in the cooling system for a transmitter according to the present invention, an inverter is provided for controlling a blower or an exhaust fan, so that the cooling capacity is changed according to the number of activated transmitters. It is possible to reduce the number of blowers or exhaust fans to a minimum, suppress a sudden current at the time of starting the blowers or exhaust fans, and further simplify the blow duct or exhaust duct. Since it is possible, there is an effect that the space in the installation station building can be saved.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the invention described in claim 1;

FIG. 2 is a block diagram of one embodiment of the invention described in claim 2;

FIG. 3 is a block diagram of one embodiment of the invention described in claim 3;

FIG. 4 is a block diagram of the related art.

[Explanation of symbols]

 11a to 11c Transmitter 12, 12a to 12c Air blow duct 13 Fan 14 Damper 15 Inverter 16a to 16c Relay for transmitter start signal 17 Air exhaust duct 18 Air exhaust fan

Claims (3)

(57) [Claims] 1. A plurality of transmitters, a common blower for cooling the transmitter, a blower duct for guiding cooling air from the blower to the transmitter, and distributing the cooling wind to each transmitter. A cooling system for a transmitter, comprising: a damper for preventing cooling air from flowing around a transmitter that is not operated; and an inverter for controlling a blowing capacity of the blower. 2. A plurality of transmitters, a common exhaust fan for cooling the transmitter, an exhaust duct for guiding exhaust from the transmitter to the exhaust fan, and an exhaust fan for exhausting the exhaust gas. A transmitter, comprising: a damper that gathers in a wind fan and prevents exhaust air from sneaking into a transmitter that is not operated; and an inverter that controls the air discharge capacity of the exhaust fan. Machine cooling system. 3. A plurality of transmitters, a common blower for cooling the transmitters, a blower duct for guiding cooling air from the blowers to the transmitters, and distributing the cooling winds to the respective transmitters. A damper for preventing cooling air from flowing around a transmitter that is not operated, an inverter for controlling the blowing capacity of the blower, and a common exhaust fan for cooling the transmitter An exhaust duct that guides exhaust air from the transmitter to the exhaust fan, and a damper that collects exhaust air into the exhaust fan and that prevents exhaust from escaping to a transmitter that is not operated. A cooling system for a transmitter, comprising: an inverter for controlling an exhaust capacity of an exhaust fan.