RU2626294C2 - System of cooling and conditioning of radio transmitters of large capacity - Google Patents

Abstract

FIELD: ventilation.

SUBSTANCE: in the cooling and air-conditioning system of a high-power radio transmitter consisting of a control device, a network of exhaust ducts and fans, the control device is made in the form of a control and monitoring cabinet that consists of a controller and soft starters. The system includes a supply and exhaust system and electric drives of the dampers of the fans, the mixing chambers of the supply and exhaust air and the temperature sensors of the external and internal air. In the supply and exhaust system there are two supply fan modules and two exhaust fan modules connected to the first inputs through the smooth-running device with the controller, and the second inputs - with differential filter and fan pressure switches, and the electric drives of the fan flaps, the supply and exhaust air displacement chambers, the sensors for temperature, outside air, exhaust air are connected to the controller.

EFFECT: automation of cooling and air conditioning processes of a high-power radio transmitter and increasing its reliability and efficiency.

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Description

The present invention relates to the field of applied mechanics and can be used in cooling and conditioning systems of high-power radio transmitting devices such as “Fire-B100”. When constructing a compact power amplifier (PA) for a radio station, there is no alternative to blowing lamps. This is confirmed by foreign practice, as the lamps are used in most modern branded amplifiers. One of the important structural elements of the amplifier can be called a lamp cooling system. There is practically no information on the design of such systems in the literature. The cooling of the GU-84B and GU-94A lamps depends on the air supply (flow) of the fan. For the most efficient use of air flow, the amplifier path must have a minimum aerodynamic drag. It is, in general, due to the location of the fan, the shape of the radio tube, its panel and the configuration of the duct. Therefore, the automation system for cooling and conditioning is very relevant.

Various systems and devices for cooling and conditioning are known. A.S. USSR No. 750248 cells F28B 9/00, No. 750249 cl. B28D 5/00, No. 750222 class F24F 11/99 et al.

Closest to the claimed technical solution is the cooling system of the radio-transmitting device SV-DV of the "Fire-B100" type with a total transmitter power of 100 kW, technical description ЖЯ1.200.231 TO1. The transmitter cooling system includes control devices, networks of exhaust ducts and fans.

Air for cooling the equipment comes from a centrifugal fan through the ducts to the thyristor controller and cabinet for cooling the GU-84B lamp, the terminals of the GU-94 lamp electrodes and load resistances. Air availability in air ducts is controlled by aerocontacts. The existing cooling system RGLDU "Rotor" open type. Heat removal from the coolant occurs in the cooling tower. In this case, due to the contact of the liquid with the outside air, there is a constant pollution of the coolant and, as a result, an abnormal deterioration of its properties.

The disadvantages of both analogues and the prototype are the lack of automation of the cooling and conditioning processes of high-power radio transmitting devices in all modes of its operation, as well as low reliability and efficiency.

The purpose of the invention is the automation of the cooling and conditioning processes of a high-power radio transmitter and increase its reliability and efficiency.

This goal is achieved by the fact that the cooling and conditioning system of a high-power radio transmitting device, consisting of a control device, a network of exhaust ducts and fans, while the control device is made in the form of a control and monitoring cabinet, which is made up of a controller and soft starters, and into the system includes the supply and exhaust installation and electric drives of the fan shutter, the chambers for mixing the supply and exhaust air and the temperature sensors of external and internal air, and this, the supply and exhaust unit includes two supply fan modules and two exhaust fan modules connected by the first inputs through the smooth-running device to the controller, and the second inputs to differential filter and fan pressure switches, and the electric actuators of the fan shutters, the supply and exhaust bias chambers air, as well as temperature sensors, outdoor air, exhaust air are connected to the controller.

In FIG. 1 shows a functional diagram of the system. It consists of:

1 - control and control cabinet (SHAUK);

2 - forced-air and exhaust installation (KKTSM);

3 - electric fan damper chambers, mixing chamber for supply and exhaust air, temperature sensors for outdoor and exhaust air;

4 - controller;

5 - soft starters;

6 - supply fan modules;

7 - exhaust fan modules;

8 - differential pressure switch (filter);

9 - differential pressure switch (fan).

In FIG. Figure 2 shows a general view of the cooling and conditioning system of a high power radio transmitter.

The cooling and conditioning system is designed for air cooling of power cells and transformers of a radio transmitting device, to ensure the conditions of its operation in accordance with the technical conditions for this equipment and operated in a temperate climate.

The principle of the system is based on the ability of air to assimilate heat from functioning equipment.

The heat generated from the power cells and transformers during the operation of the radio transmitter is assimilated by the supplied air mixture. The equipment cooling process is divided into two stages. First, the air mixture is supplied directly to the power cells. For this, each power cell is connected to the supply network by a non-conducting electric current plastic duct. Then the air mixture, which assimilated the heat emission of the power cells, cools the transformers. The heated air mixture is removed from the premises of the equipment to be cooled through a network of exhaust ducts.

To regulate (equalize) the flow rate of the air mixture supplied to each power cell by a plastic blower, throttle valves are provided at the junction of each plastic blower with the supply line.

The mechanical motivation of the movement of the air mixture is carried out by a supply and exhaust unit 2, which is located outside the building.

Maintaining the temperature of the supplied air mixture within specified limits at an outdoor temperature below 20 ° C is due to the addition of warm exhaust air to the cold supply air.

Automatic control of the operation of the supply and exhaust unit 2, based on the processing of information about the state of the system, is carried out by the control and monitoring cabinet 1.

To control the operation and technical condition of the system equipment during operation, differential pressure switches of the filter 8 and fan pressure 9 are installed.

To monitor the health of the fan motor 2, temperature sensors integrated in the windings of the fan motor are used.

The supply and exhaust unit 2 is a set of interconnected modules:

- module of the first supply fan P1;

- module of the second supply fan P2;

- module of the first exhaust fan B1;

- module of the second exhaust fan B2;

- air filter module of the first supply fan;

- air filter module of the second supply fan.

In the cooling and conditioning system of high-power radio transmitters, several auxiliary modules with air dampers are also used:

- to measure the volume of intake air;

- to change the volume of discharged air;

- before and after each exhaust fan;

- before and after each bundle "supply fan - air filter";

- to change the volume of exhaust air mixed with the supply air.

To change the position of the air dampers in the supply and exhaust unit 2, two types of electric drives are used:

- with smooth adjustment of the angle of rotation, depending on the size of the control signal, for measuring the positions of the dampers on the intake, discharge and air mixture;

- with two-position open-close control, for measuring the position of the fan shutters.

During the operation of the system, one (any) of the supply and one (any) of the exhaust fans are simultaneously used. Fans not used during system operation are in the “hot standby”. This means that in the event of signs of failure of the fan used, the corresponding standby is automatically switched on.

Managing the operation of the supply and exhaust unit 2 in various modes of operation of the system is carried out by the control cabinet 1.

The controller 4 of the control cabinet 1 controls the information received from the measuring means 3, and, depending on the results obtained, the control or protective functions are implemented:

- control of electric drives of shutters;

- control of air mixing according to the temperature of the supplied air mixture;

- the ability to track the temperature of the outdoor air, mixture, exhaust air;

- generation of a warning signal when the exhaust air temperature is higher than the set value;

- automatic switch to the backup fan in case of failure of the main one;

- generation of a warning signal, when a sign of contamination of the air filter appears;

- generating an alarm when a sign of fan overheating appears;

- ensuring the exchange of information with the control subsystem of the radio transmitter over the fiber optic channel.

On the fiber optic channel of the fiber optic link, the control and monitoring cabinet 2 provides remote start-up, shutdown of the system, and also transfers to the radio transmitter:

- a warning signal, when signs of non-critical malfunctions appear;

- an alarm signal when signs of critical malfunctions appear;

- a signal about the health of the system.

Thus, the cooling and conditioning system of the radio transmission device of the SV-DV range provides air conditioning to the room where the radio transmission device is located in all modes of its operation, and also automates the cooling and conditioning processes, while increasing its reliability and efficiency.

Claims (1)

The cooling and conditioning system of a high-power radio transmitting device, consisting of a control device, a network of exhaust ducts and fans, characterized in that the control device is made in the form of a control and monitoring cabinet, which is made up of a controller and soft starters, while the system includes a supply and exhaust installation and electric drives of fan shutters, supply and exhaust air mixing chambers and temperature sensors of external and internal air, and in the supply and exhaust air the installation includes two supply fan modules and two exhaust fan modules connected by the first inputs through the smooth-running device to the controller, and the second inputs - differential filter and fan pressure switches, and the electric actuators of the fan shutters, the supply and exhaust air displacement chambers, as well as temperature sensors, outdoor air, exhaust air connected to the controller.

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