KR102158043B1 - Cooling system and its controlling method that can restrain the formation of condensed water in active phased array radar antenna - Google Patents

Abstract

Disclosed is a cooling system capable of suppressing the formation of condensed water in an active phased array radar antenna. The cooling system controls the temperature of cooled water and then supplies the temperature to the antenna in order to suppress the formation of condensed water on an antenna surface.

Description

Cooling system and its controlling method that can restrain the formation of condensed water in active phased array radar antenna}

The present invention relates to an antenna cooling technology, and to a cooling system capable of actively suppressing the formation of condensed water even in an initial radar operation or abnormal air conditioning conditions inside an antenna room by supplying cooling water above a dew point temperature to an antenna, and to a control method thereof. .

The antenna of the active phased array radar system is composed of a plurality of semiconductor-based TRMs (Transmitter/Receiver Modules), and each TRM is composed of a plurality of transmission and reception channels. Since RF (Radio Frequency) signals generated in each channel are electronically amplified and steered, the active phased array radar can perform various operating modes almost simultaneously, and performance degradation rather than complete stoppage even in the situation of partial transmission/reception channel failure. There is an advantage that it can be operated in a (graceful degradation) state.

On the other hand, TRM generates a large amount of heat per unit volume due to the limited efficiency of semiconductor devices, and heat dissipation design is very important for stable operation of the antenna. For efficient heat dissipation, a conductive heat transfer method using a water-cooled cooling plate is commonly applied, and in this case, condensation water may be formed due to a temperature difference between the cooling plate and the surrounding air.

When condensed water penetrates the highly integrated TRM with a number of semiconductor devices, serious equipment damage may be caused by electrical defects, and measures to suppress the formation of condensed water must be prepared to prevent this.

It is possible to suppress the formation of condensed water on the cooling plate and the TRM surface through thorough humidity control of the space inside the antenna room where the active phased array radar antenna is mounted, but the TRM caused by condensed water even in the initial operation of the radar or abnormal air conditioning inside the antenna room. In order to prevent damage, it is necessary to actively suppress the formation of condensate water by the radar itself.

1. Korean Patent Registration 10-1879402 (Registration: 2018.07.11) 2. Korean Patent Publication 10-2008-0079647 3. Japanese registered patent 6532716 (Registration: May 31, 2019)

The present invention is to solve the problem according to the above background technology, in order to prevent damage to the TRM (Transmitter/Receiver Module) by condensation water even in the initial operation of the radar or abnormal air conditioning conditions inside the antenna room. An object thereof is to provide a cooling system capable of suppressing the formation of condensate and a control method thereof.

In addition, the present invention is a cooling capable of controlling the dew point temperature through monitoring of the air condition inside the antenna room and supplying cooling water above the dew point temperature to the antenna for stable heat dissipation of the antenna and suppression of condensation water formation on the antenna surface inside the antenna room. An object thereof is to provide a system and a control method thereof.

The present invention suppresses the formation of condensate water in an active phased array radar antenna to prevent damage to the TRM (Transmitter/Receiver Module) caused by condensation water even in the initial operation of the radar or abnormal air conditioning conditions inside the antenna room in order to achieve the above-mentioned problems. Provide a possible cooling system.

The cooling system is a cooling system capable of suppressing formation of condensation water of an active phased array radar antenna,

It is characterized in that the temperature of the cooled water is controlled and supplied to the antenna so as to suppress the formation of condensed water on the antenna surface.

It is characterized in that it is connected through a recovery pipe for recovering cooling water from a water cooling cooling plate, which is a part of the antenna, and a supply pipe for supplying cooling water.

In addition, it characterized in that it comprises a; a dew point sensor installed in the interior of the antenna room, measuring the internal dew point temperature to generate dew point temperature information.

In addition, the cooling system may include a recovery temperature sensor that measures a cooling water recovery temperature to generate recovery temperature information; A supply temperature sensor that measures a cooling water supply temperature to generate supply temperature information; A heat exchanger disposed between the recovery pipe and the supply pipe to cool the recovered cooling water; And a three-way valve that adjusts the flow rate of chilled water to be supplied to the heat exchanger.

In addition, the cooling system includes a controller for controlling the three-way valve to supply cooling water having a temperature higher than the dew point temperature by analyzing the dew point temperature information, the recovery temperature information, and the supply temperature information. do.

In addition, the three-way valve is characterized in that the degree of opening is controlled according to a preset opening and closing rate.

In addition, the controller compares the dew point temperature with a preset first set temperature value, and outputs a warning message to the display means to confirm the current air conditioning state of the antenna room according to the result of the first comparison. To do.

In addition, the controller, after the first comparison, compares the cooling water recovery temperature with a preset second set temperature value, and controls or heats the three-way valve to change the cooling water supply temperature according to the result of the second comparison. It is characterized by running the mode.

In this case, the second set temperature value is a value obtained by adding a preset buffer value to the dew point temperature.

In addition, the heating mode is characterized in that a heater for heating the supplied cooling water is turned on and the three-way valve is closed.

In addition, the heating mode is characterized in that it is executed until the cooling water supply temperature exceeds a second preset temperature value.

In addition, the heater is characterized in that it is disposed at the output end of the heat exchanger.

In addition, a pump that pressurizes the recovered coolant and supplies it to the heat exchanger is installed on the recovery pipe side.

In addition, the cooling system is characterized in that it comprises a; expansion tank that is connected to branch from the recovery pipe at the front end of the pump, and performs a function of compensating for a pressure change according to a volume change of the cooling water in the recovery pipe; .

On the other hand, another embodiment of the present invention is a cooling control method capable of suppressing the formation of condensed water in an active phased array radar antenna, wherein a cooling system is provided with cooled water in the antenna so as to suppress the formation of condensed water on the antenna surface. It provides a cooling control method capable of suppressing the formation of condensation water of an active phased array radar antenna, characterized in that the temperature of) is controlled and then supplied.

According to the present invention, the dew point of the air is checked by monitoring the air conditioning condition of the space inside the antenna room in which the antenna is mounted, and the cooling water above the dew point temperature is supplied to the antenna, so that the initial operation of the radar or abnormal air conditioning conditions inside the antenna room Also, it is possible to actively suppress the formation of condensation water on the antenna surface.

In addition, another effect of the present invention is that in winter or in a situation where the dew point temperature inside the antenna room is kept low, since the temperature of the cooling water supplied to the antenna is controlled to be lowered and supplied, a more stable radar operation is possible.

1 is a block diagram of an entire cooling system including a cooling system capable of suppressing formation of condensation water in an active phased array radar antenna according to an embodiment of the present invention.
2 is a flowchart showing a cooling control process capable of suppressing formation of condensation water in an active phased array radar antenna according to an embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms. It is provided to fully inform the person of the scope of the invention, and the invention is only defined by the scope of the claims. The sizes and relative sizes of components indicated in the drawings may be exaggerated for clarity of description.

The same reference numerals refer to the same elements throughout the specification, and “and/or” includes each and all combinations of one or more of the mentioned items.

The terms used in the present specification are for describing exemplary embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification, the stated elements, steps, operations and/or elements "comprising" and/or "consisting of" do not exclude the presence or addition of one or more other elements, steps, operations and/or elements. .

Although used to describe various elements such as the first and second elements, these elements are of course not limited to these terms. These terms are only used to distinguish them from one component. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical idea of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not interpreted ideally or excessively unless explicitly defined specifically.

Hereinafter, a cooling system capable of suppressing formation of condensation water of an active phased array radar antenna according to an embodiment of the present invention and a control method thereof will be described in detail with reference to the accompanying drawings.

The active phased array radar antenna is mounted inside/outside the antenna room, and the exposed antenna is protected from the external environment by a radome, and a plurality of TRMs (Transmitter/Receiver Modules) and/or major electronic devices located inside are water cooled. It is cooled by air conditioning inside the cooling plate and antenna room. In order to suppress the formation of condensed water on the internal antenna surface, it is controlled to check the dew point temperature through monitoring the air condition inside the antenna room, and to supply cooling water above the dew point temperature to the antenna.

1 is a block diagram of an entire cooling system 100 including a cooling system 120 capable of suppressing the formation of condensation water of an active phased array radar antenna according to an embodiment of the present invention. Referring to FIG. 1, the entire cooling system 100 may include a cooling system 120 that cools the antenna 111 inside the antenna chamber 110.

An active phased array radar antenna 111 in which a plurality of TRMs (Transit/Receive Modules) 112 are disposed inside the antenna room 110, and a dew point sensor 113 for sensing the temperature in the antenna room 110 are provided. Can be installed including.

In general, active phased array radar is an advanced form of radar (RADAR) that emits electromagnetic waves to an object and receives a signal reflected from the object to find out the distance, direction, and altitude from the object. In particular, radar amplifiers are developed from a vacuum tube type to a semiconductor type TRM (Transit/Receive Module) through the development and/or development of semiconductor devices, so that multiple TRMs are also used in active phased array radars.

The antenna of an active phased array radar using a TRM requires an efficient cooling structure as a large part of power is dissipated as heat when amplifying the magnitude of an electromagnetic wave. To this end, a water-cooled cooling plate is often applied as a part of the antenna structure, and in one embodiment of the present invention, a cooling system 120 for controlling, supplying and recovering the temperature of the cooling water so that condensed water is not formed on the water-cooled cooling plate applied to the antenna is described. do.

The antenna 111 includes a TRM in which a large portion of power is dissipated as heat when amplifying the magnitude of an electromagnetic wave, a water cooling plate that circulates cooling water to cool major electronic devices, a duct, a structure for securing structural rigidity, etc. Can be. Incidentally, the water-cooled cooling plate may have a structure in which hollow pipes are arranged in a spiral shape inside a plate having a certain thickness, or a structure in which it is hollow like a tube.

The dew point sensor 113 is installed inside the antenna chamber 110 and performs a function of measuring the dew point temperature. Dew point temperature refers to the temperature at which dew condenses due to saturation of water vapor in the air when the air temperature is lowered at a constant pressure. The dew point temperature is proportional to the amount of water vapor, that is, the humidity. When the amount of water vapor is about 4.8g/㎥, the dew point temperature is about 0℃, and when the amount of water vapor is about 10.6g/㎥, the dew point temperature is about 12℃. Of course, the dew point sensor 113 may measure the current air conditioning state in the antenna room 110. That is, it may be configured to include a temperature sensor or the like.

The antenna 111 inside the antenna room 110 is connected to the cooling system 120 through a recovery pipe 130-1 for recovering cooling water and a supply pipe 130-2 for supplying cooling water.

The cooling system 120 is a recovery temperature sensor 121-1 that measures the temperature of the recovered cooling water by being installed in the recovery pipe 130-1, and the cooling water that is installed in the supply pipe 130-2 and measures the temperature of the supplied cooling water. A supply temperature sensor 121-2, an expansion tank 122 for compensating for a pressure change according to a change in the volume of cooling water in the cooling system, a pump 125 installed in the recovery pipe 130-1 to pressurize the cooling water, A heater 126 installed in the supply pipe 130-2 to heat the cooling water supplied when necessary, a heat exchanger 127 for cooling the cooling water recovered after cooling, and chilled water supplied to the heat exchanger 127 It is configured to include a three-way valve (128) for controlling the flow rate of water).

The supply temperature sensor 121-1 is installed at the output end of the heater 126 to measure the temperature of the supplied cooling water.

The recovery temperature sensor 121-1 and the supply temperature sensor 121-2 are sensors that respond to changes in temperature and are used to automate temperature management by detecting temperature changes. They are installed in the pipe to directly contact the cooling water to control the temperature. Can be detected. The contact-type temperature sensor is a device for electronic circuits that has a characteristic that the resistance value changes according to the temperature change, and it is widely used as a temperature control sensor because it has a small heat capacity and a rapid resistance change occurs even with a minute temperature change.

The expansion tank 122 performs a function of compensating for a pressure change according to a change in the volume of cooling water in the system. The expansion tank 122 is branched from and connected from the recovery pipe 130-1, which is the main pipe, at the front end of the pump 125.

The pump 125 performs a function of circulating coolant. In other words, the cooling water that has passed through the antenna 111 is recovered from the recovery pipe 130-1 and supplied to the supply pipe 130-2 through the heat exchanger 127.

The heater 126 may be an electric heater, but is not limited thereto, and a gas heater or a heat pump may be used. In general, an electric heater is a method of using Joule heat generated by passing current through a resistance wire. Accordingly, the cooling water on the supply pipe 130-2 is heated and heated according to the control of the controller 123.

Basically, the temperature of the cooling water supplied to the antenna 111 side of the antenna chamber 110 is controlled to be higher than the dew point temperature according to the flow rate control of the cold water by the three-way valve 128.

In addition, or independently, if necessary, the cooling water heated by the antenna 111 is supplied after heating the cooling water above the dew point temperature through the heater 126.

The heat exchanger 127 may be a solution heat exchanger that receives chilled water from the cold water supply line 150 and cools the cooling water. The heat exchanger performs the function of exchanging heat between two fluids. That is, heat exchange is performed by indirect or direct contact between fluids having different temperatures. The heat exchange method may be a partition wall type, and the structure may be a double tube type, but is not limited thereto.

The controller 123 monitors the status information, checks the dew point temperature through this monitoring, and provides the three-way valve 128 and the heater 126 to supply cooling water above the dew point temperature to the antenna 111 of the antenna chamber 110. It performs the function to control. The state information may be an air condition inside the antenna room 110, a cooling water temperature of the recovery pipe 130-1, and a cooling water temperature of the supply pipe 130-2. In addition, the controller 123 controls the pump 125 to supply a desired supply pressure and flow rate. Therefore, the controller 123 controls the cooling water supply temperature through operation control of the components such as the pump 125, the heater 126, and the three-way valve 128 based on the measured state information.

The controller 123 may include a program having an algorithm for executing such control, a memory storing data, etc., a microprocessor executing a program, a microcomputer, an electronic circuit, and the like.

The memory may be a memory provided in the microprocessor or may be a separate memory. Therefore, flash memory disk (SSD: Solid State Disk), hard disk drive, flash memory, EEPROM (Electrically erasable programmable read-only memory), SRAM (Static RAM), FRAM (Ferro-electric RAM), PRAM (Phase-change RAM) ), MRAM (Magnetic RAM), and/or DRAM (Dynamic Random Access Memory), SDRAM (Synchronous Dynamic Random Access Memory), DDR-SDRAM (Double Data Rate-SDRAM) Can be.

The three-way valve 128 functions to control the flow rate of cold water supplied from the cold water supply line 150 to the heat exchanger by determining the opening/closing rate according to the control of the controller 123 and controlling the degree of opening. For example, if the open/close rate of the three-way valve 128 is 0%, there is no flow rate of cold water supplied to the heat exchanger, and if the open/close rate is 50%, 50% of cold water is supplied to the heat exchanger in a half-open state. When cold water is supplied to the heat exchanger 127 by the three-way valve 128, the cooling water is cooled through the recovery pipe 130-1 and is recovered through the recovery line 160. Of course, cold water that has not passed through the heat exchanger 127 is recovered to the recovery line through the feedback line 160-1. That is, one end of the three-way valve 128 is connected to the cold water supply line 150 supplying the cold water, and the other end of the three-way valve 128 is connected to the heat exchanger 127, and the three-way The side of the valve 128 is connected to a feedback line 160-1 for recovering the cold water that has not passed through the heat exchanger 127.

Although not shown in FIG. 1, a display means (not shown) may be connected to the controller 123 to provide a current state to the user. The display means may be a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display, a Plasma Display Panel (PDP), an Organic LED (OLED) display, a touch screen, a cathode ray tube (CRT), a flexible display, and the like.

2 is a flowchart showing a cooling control process capable of suppressing formation of condensation water in an active phased array radar antenna according to an embodiment of the present invention. 2, generated by the dew point sensor 113 installed in the antenna room 110, the recovery temperature sensor 121-1 for the cooling water installed in the cooling system 120, and the supply temperature sensor 121-2. The cooling water recovery temperature, the cooling water supply temperature, the dew point temperature, and the like are detected by the recovery temperature information, the supply temperature information, and the dew point temperature information (step S210).

Thereafter, the controller 123 compares the detected dew point temperature with a preset temperature value T1 (step S220). As a result of the comparison, when the dew point temperature exceeds the preset temperature value T1, the controller 123 displays a warning message on the display means to confirm the current air conditioning state of the antenna chamber 110 to the user (step S221).

In order to suppress the formation of condensed water, cooling water exceeding the dew point temperature must be supplied to the antenna 111 of the antenna chamber 110, but if the cooling water above a certain temperature is supplied, stable operation of the antenna is not possible, so a preset temperature value (T1) ) Is required.

In step S220, when the dew point temperature is less than or equal to T1, the controller 123 compares the cooling water recovery temperature and the dew point temperature (step S230). In step S230, as a result of the comparison, if the recovery temperature is less than or equal to the value obtained by adding the preset buffer temperature T2 to the dew point temperature, the supply temperature must be equal to or less than the dew point temperature + T2 without heating the cooling water, so the heating mode is entered ( Step S240). In the heating mode, the three-way valve 128 is opened (ie, closed) by 0% to prevent cold water from flowing into the heat exchanger 127, and at the same time, power is applied to the heater 126 to heat the cooling water. do.

The cooling water supply temperature is set to a temperature obtained by adding a constant buffer temperature value (T2) to the dew point temperature to suppress the formation of condensed water. After power is applied to the heater 126, the cooling water supply temperature and the dew point temperature are compared and the cooling water is heated until the supply temperature exceeds the dew point temperature + T2 (step S250).

In step S250, as a result of the comparison, when the cooling water supply temperature exceeds the dew point temperature + T2, the power applied to the heater 126 is cut off, and the cooling water having the dew point temperature + T2 or higher is controlled by adjusting the opening amount of the three-way valve 128. Is controlled to be supplied to the antenna chamber 110 (steps S260 and S270).

On the other hand, in step S230, when it is determined that the cooling water recovery temperature exceeds the dew point temperature + T2, the cooling water supply temperature is controlled by adjusting the three-way valve 128 without heating the cooling water (step S270).

In addition, the steps of the method or algorithm described in connection with the embodiments disclosed herein are implemented in the form of program instructions that can be executed through various computer means such as a microprocessor, a processor, a CPU (Central Processing Unit), etc. It can be recorded on any media. The computer-readable medium may include a program (command) code, a data file, a data structure, or the like alone or in combination.

The program (command) code recorded on the medium may be specially designed and configured for the present invention, or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROM, DVD, Blu-ray, and the like, and ROM, RAM ( A semiconductor memory device specially configured to store and execute program (instruction) codes such as RAM), flash memory, and the like may be included.

Here, examples of the program (instruction) code include not only machine language codes such as those created by a compiler but also high-level language codes that can be executed by a computer using an interpreter or the like. The above-described hardware device may be configured to operate as one or more software modules to perform the operation of the present invention, and vice versa.

100: full cooling system
110: antenna room
111: active phased array radar antenna
112: Transit/Receive Modules (TRM)s
113: dew point sensor
120: cooling system
121-1: recovery temperature sensor
121-2: supply temperature sensor
122: expansion tank
123: controller
125: pump
126: burner
127: heat exchanger
128: 3-way valve
130-1: recovery pipe
130-2: supply piping

Claims (14)

In the cooling system 120 capable of suppressing the formation of condensation water of the active phased array radar antenna 111,
The cooling system 120 controls the temperature of the cooled water in the active phased array radar antenna 111 so that the formation of condensation water on the surface of the active phased array radar antenna 111 is suppressed. Supplying the cooling water,
The active phased array radar antenna 111 includes a recovery pipe 130-1 for recovering the cooling water whose temperature is controlled from a water cooling cooling plate, which is a part, and a supply pipe 130- for supplying the cooling water whose temperature is controlled. 2) is connected through,
A dew point sensor 113 is installed inside the antenna room 110 in which the active phased array radar antenna 111 is installed, and the dew point sensor 113 measures the dew point temperature inside the antenna room 110 Generates dew point temperature information,
The cooling system 120 may include a recovery temperature sensor 121-1 configured to generate recovery temperature information by measuring a cooling water recovery temperature of the cooling water whose temperature is controlled; A supply temperature sensor (121-2) for generating supply temperature information by measuring a cooling water supply temperature of the cooling water whose temperature is controlled; A heat exchanger (127) disposed between the recovery pipe (130-1) and the supply pipe (130-2) to cool the temperature-controlled cooling water recovered; And a three-way valve 128 for controlling a flow rate of chilled water supplied to the heat exchanger 127 for cooling the temperature-controlled cooling water recovered after cooling,
The cooling system 120 analyzes the dew point temperature information, the recovery temperature information, and the supply temperature information to supply the cooling water whose temperature is controlled to have a temperature higher than the dew point temperature so as to suppress formation of the condensed water. Includes; a controller 123 for controlling the three-way valve 128 so that
One end of the three-way valve 128 is connected to a cold water supply line 150 for supplying the cold water, and the other end of the three-way valve 128 is connected to the heat exchanger 127, and the three-way valve ( A cooling system capable of suppressing the formation of condensed water of an active phased array radar antenna, characterized in that the side of 128) is connected to a feedback line (160-1) for recovering the cold water that has not passed through the heat exchanger (127).
delete delete delete delete The method of claim 1,
The three-way valve 128 is a cooling system capable of suppressing the formation of condensed water of an active phased array radar antenna, characterized in that the degree of opening is controlled according to a preset opening/closing rate.
The method of claim 1,
The controller 123 first compares the dew point temperature with a preset first set temperature value T1, and checks the current air conditioning state of the antenna chamber 110 according to the result of the first comparison. A cooling system capable of suppressing the formation of condensation water of an active phased array radar antenna, characterized in that a warning message is output to a display means.
The method of claim 7,
After the first comparison, the controller 123 performs a second comparison of the cooling water recovery temperature with a preset second set temperature value, and changes the cooling water supply temperature according to the result of the second comparison. Controls the valve (128) or executes a heating mode, and the second set temperature value is a value obtained by adding a preset buffer value (T2) to the dew point temperature. Possible cooling system.
The method of claim 8,
In the heating mode, it is possible to suppress the formation of condensed water of the active phased array radar antenna, characterized in that the heater 126 for heating the supplied temperature-controlled cooling water is turned on and the three-way valve 128 is closed. Cooling system.
The method of claim 9,
The heating mode is a cooling system capable of suppressing the formation of condensed water of an active phased array radar antenna, characterized in that it is executed until the cooling water supply temperature exceeds a second preset temperature value.
The method of claim 9,
The heater (126) is a cooling system capable of suppressing the formation of condensed water of the active phased array radar antenna, characterized in that disposed at the output terminal of the heat exchanger (127).
The method of claim 11,
Condensed water formation of an active phased array radar antenna, characterized in that a pump 125 for supplying the heat exchanger 127 to circulate the temperature-controlled cooling water recovered on the recovery pipe 130-1 side Restricted cooling system.
The method of claim 12,
Branched from the recovery pipe 130-1 at the front end of the pump 125 and connected, the temperature in the recovery pipe 130-1 compensates for a change in pressure according to the volume change of the cooling water. A cooling system capable of suppressing the formation of condensation water of an active phased array radar antenna, comprising: an expansion tank 122 to perform.
In the cooling control method capable of suppressing the formation of condensed water of the active phased array radar antenna 111,
The cooling system 120 controls the temperature of the cooled water in the active phased array radar antenna 111 so that the formation of condensed water on the surface of the active phased array radar antenna 111 is controlled, and then the temperature is controlled. Supplying coolant,
The active phased array radar antenna 111 includes a recovery pipe 130-1 for recovering the cooling water whose temperature is controlled from a water cooling cooling plate, which is a part, and a supply pipe 130- for supplying the cooling water whose temperature is controlled. 2) is connected through,
A dew point sensor 113 is installed inside the antenna room 110 in which the active phased array radar antenna 111 is installed, and the dew point sensor 113 measures the dew point temperature inside the antenna room 110 Generates dew point temperature information,
The cooling system 120 may include a recovery temperature sensor 121-1 configured to generate recovery temperature information by measuring a cooling water recovery temperature of the cooling water whose temperature is controlled; A supply temperature sensor (121-2) for generating supply temperature information by measuring a cooling water supply temperature of the cooling water whose temperature is controlled; A heat exchanger (127) disposed between the recovery pipe (130-1) and the supply pipe (130-2) to cool the temperature-controlled cooling water recovered; And a three-way valve 128 for controlling a flow rate of chilled water supplied to the heat exchanger 127 for cooling the temperature-controlled cooling water recovered after cooling,
The cooling system 120 analyzes the dew point temperature information, the recovery temperature information, and the supply temperature information to supply the cooling water whose temperature is controlled to have a temperature higher than the dew point temperature so as to suppress formation of the condensed water. Includes; a controller 123 for controlling the three-way valve 128 so that
One end of the three-way valve 128 is connected to a cold water supply line 150 for supplying the cold water, and the other end of the three-way valve 128 is connected to the heat exchanger 127, and the three-way valve ( A cooling control method capable of suppressing the formation of condensed water of an active phased array radar antenna, characterized in that the side of 128) is connected to a feedback line 160-1 for recovering the cold water that has not passed through the heat exchanger (127).

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