JP2004037040A - Coolant freezing prevention method in water-cooled solidification type transmitter cooling system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coolant freezing prevention method for a solidification type transmitter cooling system using a coolant possible to be freezed like water without using the antifreeze as a coolant in the water-cooled solidification type transmitter system. <P>SOLUTION: The cooling water is fed to a solidification transmitter 3 by a pump 2, and cools a power amplifier 4 as a heat generating source to absorb the heat. The cooling water which absorbed the heat of the power amplifier 4 and of which temperature rises is fed to a discharge heat recovery board 5. The discharge heat recovery board 5 separately provided from the solidification transmitter cooling system and a cooling water circulation route is thermally connected (to transfer the thermal energy) to the both, and the operation-side cooling water, of which temperature rises, conducts the heat through the discharge heat recovery board 5, and raises temperature of the cooling water, of which temperature is low, of a waiting side to prevent freeze thereof. The operation-side cooling water restricted in temperature rise is fed to a heat exchanger 6, and further cooled by a fan 7 provided inside the heat exchanger, and returned to a water tank 1. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to prevention of freezing of a water-cooled solidification transmitter, and particularly to prevention of cooling and freezing of a water-cooled solidification transmitter that does not use antifreeze.
[0002]
[Prior art]
In a (radio wave) transmitter such as a television broadcast transmitter, a transmitter in which a power amplifier is mounted on its housing is generally called a “solidified transmitter”. This type of transmitter often has a cooling system for preventing an excessive rise in temperature of the power amplifier.
[0003]
In order to use the solid-state transmitter stably, it is important to efficiently cool the power amplifier of the solid-state transmitter that generates heat. One of the cooling methods is a cooling system using water as a refrigerant. FIG. 2 shows an example of a conventional water-cooled cooling system for a solidification transmitter.
[0004]
However, when water is used as the refrigerant, there is no heat generated when the solidification transmitter is in a standby state in winter, so that water as the refrigerant freezes. Therefore, in such a solidification transmitter, antifreeze is often used as a refrigerant.
[0005]
[Problems to be solved by the invention]
When the solidification transmitter is in a standby state in winter or a cold region, there is no or very little heat generated, so that there is a problem that water as a refrigerant freezes. Conventionally, this has been dealt with by using antifreeze as a refrigerant. However, when an antifreeze is used as a refrigerant, great care must be taken when replacing the antifreeze, resulting in a new problem that the processing operation becomes extremely complicated.
[0006]
An object of the present invention is to provide a method for preventing refrigerant freezing in a cooling system of a solidification transmitter using a refrigerant that can be frozen, such as water, without using antifreeze as a refrigerant in a water-cooled solidification transmitter system. is there.
[0007]
[Means for Solving the Problems]
In view of the above problems, a refrigerant freezing prevention method for a solid-state transmitter cooling system includes a solid-state transmitter redundantly configured by two systems, a working side and a standby side, and a power amplifier included in each of the solid-state transmitters. Is provided with circulation type cooling means on the working side and the spare side for cooling the heat generated by the cooling medium by conducting the heat to the freezing fluid refrigerant and cooling and reusing it in the process of circulating the freezing fluid refrigerant. In the solidified transmitter cooling system, the working and standby solidified transmitters are thermally separated from each other, and heat is exchanged between the working and standby circulating cooling means. Immediately after cooling the working-side power amplifier, heat is transferred from the working-side frostable fluid refrigerant to the spare-side frostable fluid refrigerant via the exhaust heat recovery board. It is characterized by being performed.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0009]
FIG. 1 is a system diagram of the solidification transmitter cooling system of the present invention. A cooling system comprising a water tank 1, a solidification transmitter 3, and a heat exchanger 6 is provided in two systems, a working side and a standby side. When the working side solidification transmitter is operating, the standby side solidification transmitter is stopped. In addition, a so-called “backup” configuration is used in which the standby system is operated when the working side is stopped. In addition, for the cooling water as a refrigerant, each system has an independent circulation route in order to provide a redundant system. Hereinafter, a case where the working side is operating and the standby side is stopped will be described as an example.
[0010]
Cooling water is stored in a water tank 1 and sent to a solidification transmitter 3 by a pump 2 in the water tank 1 to cool a power amplifier 4 that is a heat source and absorb heat. The cooling water whose temperature has been increased by absorbing the heat of the power amplifier 4 is subsequently sent to the exhaust heat recovery board 5. Although the exhaust heat recovery board 5 is provided independently of the cooling system of the two solidification transmitters and the circulation route of the cooling water, it is thermally coupled (exchange of heat energy). Therefore, the cooling water on the working side whose temperature has risen conducts heat conduction through the exhaust heat recovery board 5, and freezing is prevented by increasing the temperature of the cooling water having a low temperature on the standby side.
[0011]
Further, due to this heat conduction, an excessive rise in temperature of the working side cooling water is suppressed, and the cooling efficiency can be improved. The working-side cooling water whose temperature rise has been suppressed by the exhaust heat recovery board 5 is sent to the heat exchanger 6, further cooled by the fan 7 provided inside, and then returned to the original water tank 1. .
[0012]
【The invention's effect】
As described above, in the refrigerant freezing prevention method of the water-cooled solidification transmitter cooling system of the present invention, the exhaust heat recovery panel is provided in the system, and the waste heat of the working solidification transmitter is transferred to the standby solidification transmission. By conducting heat to the machine, the refrigerant temperature of the standby-side solidification transmitter can be raised to prevent freezing. This makes it possible to construct a water-cooled cooling system in winter or cold regions without using antifreeze. Further, by transferring the heat of the working side to another system by the exhaust heat recovery board, it is possible to suppress an excessive rise in the temperature of the working side refrigerant, so that heat exchange in the heat exchanger can be reduced and the heat exchange efficiency can be reduced. Can be improved.
[Brief description of the drawings]
FIG. 1 is a system diagram and a block diagram showing heat circulation of a water-cooled solidification transmitter cooling system of the present invention.
FIG. 2 is a system diagram of a conventional water-cooled solidification transmitter cooling system.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water tank 2 Pump 3 Solidification transmitter 4 Power amplifier 5 Exhaust heat recovery board 6 Heat exchanger 7 Fan 8 Cooling water 9 Cooling water circulation pipe

Claims (2)

A solid-state transmitter redundantly configured by two systems, a working side and a standby side, and heat generated by the power amplifiers provided in both the solid-state transmitters is cooled by conducting heat to a fluid refrigerant having freezing property; In the solidification transmitter cooling system comprising a circulating cooling means for cooling and reusing in the process of circulating a fluid refrigerant having freezing properties on the working side and the spare side,
The working side and the spare side solidification transmitter are thermally separated, and an exhaust heat recovery board that exchanges heat with the working side and the spare side circulating cooling means is provided. Immediately after cooling the side power amplifier, heat conduction is performed from the working side frostable fluid refrigerant to the spare side frostable fluid refrigerant via the exhaust heat recovery board, A refrigerant freezing prevention method for a solidification transmitter cooling system. The refrigerant freezing prevention method for a solidification transmitter cooling system according to claim 1, wherein the freezing fluid refrigerant is cooling water.

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