TWM630286U - Automatic fluid replenishment cooling system - Google Patents

Abstract

An automatic liquid replenishment cooling system includes a heat exchanger, a first circulation unit, a second circulation unit, a liquid replenishment unit, a control unit and a sensing unit. The first circulation unit is connected to the heat exchanger and includes a first supply line, a first return line and a first working fluid; the second circulation unit is connected to the heat exchanger and includes a second supply line and a second return line and the second working fluid; the liquid replenishing unit includes a condensing part, a condensing water tank, a liquid replenishing pipeline and a liquid replenishing valve; In the second circulation unit, the liquid replenishment valve is arranged on the liquid replenishment pipeline; the control unit is coupled to the liquid replenishment valve; the sensing unit includes a liquid volume sensor, and the liquid volume sensor is electrically connected to the control unit.

Description

Automatic rehydration cooling system

The novel creation provides an automatic liquid replenishment cooling system, and particularly relates to an automatic liquid replenishment cooling system that can automatically replenish the working fluid in the secondary side circulation pipeline.

Cooling Distribution Unit (CDU) is a kind of cooling mechanical equipment that is quite common in the industry. Generally speaking, in order to modularize the cooling distribution unit to meet the cooling requirements of multiple different equipment at the same time, the primary side cooling pipeline and multiple sets of secondary side cooling pipelines are usually arranged on both sides of the heat exchanger. The secondary cooling lines are in a parallel relationship with each other, so that even if one of these secondary cooling lines requires stronger or lower cooling capacity, the operator can adjust the The working fluid on the primary side that takes the heat of the heat exchanger can meet the cooling demand of the secondary side and take into account the cooling capacity at the same time.

In an industrial environment, the equipment end connected to the secondary side is, for example, a cooling back door or a water-cooled server. These equipment ends are usually connected to each pipeline with a quick connector. , causing the surface of the joint to wet or the working fluid to evaporate. If the secondary side circulation pipeline is a closed circuit, the working fluid will gradually decrease and thus affect the cooling capacity of the secondary side. In the past, users usually connected a soft water supply bag on the secondary side to replenish the water due to evaporation or leakage at any time, but this not only increases the volume of the secondary side circulation pipeline, but also requires users to monitor the The amount of water in the rehydration soft bag is not conducive to the automation of the rehydration process.

In addition, the general working environment with cooling unit operation requires dehumidification to avoid moisture in the air, reduce the operating efficiency of the machine and reduce the service life of the components. However, since the internal space of the cabinet installed with the cooling unit is small, if an additional dehumidifier is installed, the volume of the cabinet will increase, making the equipment larger, and the power consumed by the dehumidifier will also reduce the overall cooling unit. The power usage efficiency (Power Usage Effectiveness, PUE) decreases accordingly.

The creator then exhausted his mind and researched it, and then developed an automatic replenishment cooling system that can automatically replenish the working fluid in the secondary side circulation pipeline, in order to achieve the effect of automatically maintaining the secondary side cooling capacity and dehumidifying the working environment.

The novel creation provides an automatic liquid replenishment cooling system, which includes a heat exchanger, a first circulation unit, a second circulation unit, a liquid replenishment unit, a control unit and a sensing unit. The first circulation unit is connected to one side of the heat exchanger and includes a first supply line, a first return line and a first working fluid, wherein the first working fluid flows through the first supply line, the heat an exchanger and a first return line; the second circulation unit is connected to the other side of the heat exchanger and includes a second supply line, a second return line and a second working fluid, wherein the second working fluid is The first working fluid flows through the second supply pipeline, the heat exchanger and the second return pipeline in sequence, and the temperature of the first working fluid is lower than that of the second working fluid; a liquid replenishment valve, wherein the condensing element is arranged on the first circulation unit, the condensed water tank is arranged under the condensing element, the liquid replenishing pipeline is connected to the condensed water tank and the second circulation unit, and the liquid replenishing valve is arranged on the liquid replenishing pipeline; the control unit is coupled to in the liquid replenishing valve; the sensing unit includes a liquid quantity sensor, wherein the liquid quantity sensor is electrically connected to the control unit and used for detecting the liquid quantity of the second working fluid.

In one embodiment, the above-mentioned first circulation unit further includes a temperature control valve and a regulating pipeline, wherein the temperature control valve is disposed on and coupled to one of the first supply pipeline and the first return pipeline In the control unit, the regulating pipeline is connected between the temperature control valve and the other of the first supply pipeline and the first return pipeline. The sensing unit further includes a temperature sensor, wherein the temperature sensor is electrically connected to the control unit and used for detecting the temperature of the second working fluid.

In one embodiment, the above-mentioned second circulation unit further includes a second working fluid storage tank and an exhaust valve, the second working fluid storage tank is arranged on the second supply pipeline, and the liquid volume sensor and the exhaust valve are arranged. It is arranged on the second working fluid storage tank.

In one embodiment, the above-mentioned second circulation unit further includes at least one auxiliary pump, and the auxiliary pump is disposed on the second return line.

In one embodiment, the above-mentioned condensing element is disposed on the first supply pipeline, and one end of the liquid replenishing pipeline is connected to the second return pipeline.

In one embodiment, the above-mentioned condensing element is a fin, and one of the first supply line and the first return line is passed through the condensing element.

In one embodiment, the above-mentioned liquid replenishment unit further includes a pressurized pump, and the pressurized pump is disposed on the liquid infusion pipeline.

In one embodiment, the above-mentioned liquid replenishing unit further includes a drainage pipeline, the replenishing valve is a three-way valve, and the drainage pipeline is arranged on the replenishing valve.

In one embodiment, the above-mentioned sensing unit further includes a first flowmeter and a second flowmeter, the first flowmeter is disposed on one of the first supply pipeline and the first return pipeline, and the first flowmeter is disposed on one of the first supply pipeline and the first return pipeline. The two flow meters are arranged on one of the second supply line and the second return line.

In one embodiment, the above-mentioned heat exchanger is a plate heat exchanger.

Thereby, the newly created automatic liquid replenishment cooling system can condense the moisture in the air in the working environment through the condensing element and the condensing water tank, so as to achieve the effect of dehumidification. On the other hand, the automatic rehydration cooling system The system can detect the liquid volume of the second working fluid through the liquid volume sensor. When the liquid volume of the second working fluid is insufficient, the control unit can drive the liquid replenishment valve and send the condensed water collected by the condensate water tank through the liquid replenishment pipeline. to the second circulation unit, so as to achieve the effect of supplementing the amount of the second working fluid.

In order to make the above-mentioned features and advantages of the novel creation more obvious and easy to understand, the following embodiments are given and described in detail with the accompanying drawings as follows.

1: Automatic rehydration cooling system

100: heat exchanger

200: The first cycle unit

210: First supply line

220: The first return line

222: The upstream section of the first return flow

224: first reflux downstream section

230: Adjusting the pipeline

232: Auxiliary valve

240: temperature control valve

300: Second cycle unit

310: Second supply line

320: Second return line

330: Second working fluid storage tank

332: Exhaust valve

340: Auxiliary Pump

350: Check valve

400: Fluid replacement unit

410: Condensation Parts

420: Condensate tank

430: rehydration line

432: Upstream section of rehydration pipeline

434: Downstream section of the rehydration pipeline

440: Rehydration valve

450: Pressurized pump

460: Drain Line

462: Drain valve

500: Control Unit

510: Temperature control valve driver

520: Refill valve driver

600: Sensing unit

610: Liquid volume sensor

620: Temperature sensor

630: Humidity Sensor

640: First flow meter

650: Second flow meter

700: Filter unit

F1, F2: working fluid

FIG. 1 is a block schematic diagram of an embodiment of a newly created automatic liquid replenishment cooling system.

FIG. 2 is a schematic front view of the automatic liquid replenishment cooling system of FIG. 1 .

FIG. 3 is a schematic rear view of FIG. 2 .

FIG. 4 is a schematic diagram of the pipeline configuration of FIG. 1 .

The aforementioned and other technical contents, features and effects of the novel creation will be clearly presented in the following detailed description of the preferred embodiments with reference to the drawings. It is worth mentioning that the directional terms mentioned in the following embodiments, such as: up, down, left, right, front or rear, etc., are only for referring to the directions of the attached drawings. Therefore, the directional terms used are intended to illustrate, rather than limit, the present invention. Furthermore, in the following embodiments, the same or similar elements will be given the same or similar reference numerals.

Please refer to FIG. 1 . FIG. 1 is a block schematic diagram of an embodiment of a newly created automatic liquid replenishment cooling system. The automatic liquid replenishment cooling system 1 of this embodiment includes a heat exchanger 100, a first circulation unit 200, a second circulation unit 300, a liquid replenishment unit 400, a control unit 500, and a sensing unit 600, wherein the first circulation unit The unit 200 and the second circulation unit 300 are connected to the heat exchanger 100; the liquid replenishing unit 400 is disposed between the first circulation unit 200 and the second circulation unit 300; the control unit 500 is coupled to the first circulation unit 200 and the second circulation unit 300. A circulation unit 200 and a liquid replenishing unit 400 ; and the sensing unit 600 is electrically connected to the second circulation unit 300 and the control unit 500 .

Please refer to FIG. 2 to FIG. 4 , wherein FIG. 2 is a schematic front view of the automatic replenishment cooling system of FIG. 1 , FIG. 3 is a schematic rear view of FIG. 2 , and FIG. 4 is a schematic diagram of the pipeline configuration of FIG. 1 . In detail, the automatic replenishment cooling system 1 is, for example, a cooling unit that can be installed in a server or industrial equipment cabinet, and passes through the primary side cooling pipeline served by the first circulation unit 200 and the second circulation unit respectively. The secondary side cooling pipes served by 300 respectively flow through the heat exchanger 100 to achieve the effect of reducing the temperature of the equipment. As shown in FIG. 4 , the heat exchanger 100 is, for example, a plate heat exchanger, which can reduce the clogging of the working fluid inside and is easy to clean. In addition, the number of devices can be changed by increasing or decreasing the number of flow passage plates inside. heat transfer requirements. Of course, in other possible embodiments, the heat exchanger 100 may also be a shell-and-tube, heat-pipe or fin-and-tube heat exchanger, which is not limited in the present invention.

Besides, as shown in FIG. 4 , the first circulation unit 200 is connected to one side of the heat exchanger 100 and includes a first supply line 210 , a first return line 220 and a first working fluid F1 , In this embodiment, the first supply pipeline 210 is connected to, for example, an ice water machine, and the first working fluid F1 is, for example, ice water at 7-11°C. When the automatic replenishment cooling system 1 operates, the first working fluid F1 will sequentially flow through the first supply line 210 , the plates inside the heat exchanger 100 and the first return line 220 to take away the fluid inside the heat exchanger 100 . On the other hand, the second circulation unit 300 is connected to the other side of the heat exchanger 100 and includes a second supply line 310, a second return line 320 and a second working fluid F2, in this embodiment Among them, the second supply line 310 and the second return line 320 are connected to a device end, wherein the device end is, for example, a cooling back door or a water-cooled server, and the second working fluid F2 is, for example, cold water at 15-16.5°C , but the first working fluid F1 and the second working fluid F2 do not exchange fluids with each other inside the heat exchanger 100 . When the automatic replenishment cooling system 1 operates, the second working fluid F2 will flow through the second supply pipeline 310 in sequence, and the heat exchange The plates inside the heat exchanger 100 and the second return line 320 transfer the heat at the equipment end to the heat exchanger 100, thereby reducing the temperature at the equipment end. In other words, the temperature of the first working fluid F1 is lower than the temperature of the second working fluid F2, but the present invention does not limit the fluid types and specific working temperature ranges of the first working fluid F1 and the second working fluid F2.

It is worth mentioning that, the first circulation unit 200 and the second circulation unit 300 in this embodiment may be a closed loop, respectively. For example, the ends of the first supply line 210 and the first return line 220 away from the heat exchanger 100 can be connected to an ice water supply, and the first working fluid F1 that flows through the heat exchanger 100 and warms up after passing through the heat exchanger 100 After the first return line 220 flows back to the ice water supply, it will be cooled by the refrigeration unit inside the ice water supply and then flow toward the heat exchanger 100 through the first supply line 210 again. Preferably, as shown in FIG. 2 , the automatic liquid replenishment cooling system 1 further includes a filter unit 700 , wherein the filter unit 700 is, for example, a filter and is disposed on the first return line 220 to filter the flow through the heat exchanger 100 . The first working fluid F1 can prevent impurities or foreign matter that may be entrained in the circulation process from contaminating the supply source of the first working fluid F1.

On the other hand, the second working fluid F2 flows in the closed circuit formed by the heat exchanger 100 , the second return line 320 , the equipment end and the second supply line 310 . As shown in FIG. 2 and FIG. 4 , the second circulation unit 300 further includes a second working fluid storage tank 330 and an exhaust valve 332, wherein an appropriate amount of the second working fluid F2 is stored in the second working fluid storage tank 330, It is used as a buffer when the second working fluid F2 in the second supply line 310 and the second return line 320 decreases; and the exhaust valve 332 is disposed on the second working fluid storage tank 330, which can store the second working fluid The internal air bubbles of F2 are discharged during the circulation process, so as to avoid the air bubbles adhering to the plates inside the heat exchanger 100 and reducing the heat transfer effect.

As shown in FIG. 3 and FIG. 4 , the first circulation unit 200 preferably further includes a regulating pipeline 230 and a temperature control valve 240 , wherein the temperature control valve 240 is disposed in the first supply pipeline 210 and the first return pipeline 220 and coupled to the control unit 500, and the regulating pipeline 230 is connected to the temperature control valve 240 and the first between a supply line 210 and the other of the first return line 220 . In this embodiment, the temperature control valve 240 is disposed on the first return line 220, and the adjustment line 230 is connected between the temperature control valve 240 and the first supply line 210 as an example, but the present invention does not Unrestricted. As shown in FIG. 4 , the temperature control valve 240 is, for example, a three-way valve, and the first return line 220 is divided by the temperature control valve 240 into a first return upstream connected between the heat exchanger 100 and the temperature control valve 240 . Section 222 and a first downstream downstream section 224 connected from the temperature control valve 240 . Thereby, the first circulation unit 200 can be divided into a first circuit formed by the first supply pipe 210 , the heat exchanger 100 , the first return upstream section 222 and the first return downstream section 224 , and the first circuit formed by the first supply pipe The second circuit formed by the circuit 210 , the regulating pipeline 230 and the downstream section 224 of the first return flow.

Preferably, as shown in FIG. 4, the control unit 500 includes a temperature control valve driver 510, and the sensing unit 600 includes a temperature sensor 620, wherein the temperature sensor 620 is, for example, a thermocouple and is used to detect The temperature of the second working fluid F2. Through such a configuration, when the control unit 500 detects through the temperature sensor 620 that the temperature of the second working fluid F2 rises or falls to a threshold value, the control unit 500 controls the temperature control valve 240 to adjust the temperature through the temperature control valve driver 510. The opening and closing of the pipeline 230 adjusts the flow rate of the first working fluid F1 flowing through the heat exchanger 100 to maintain the temperature of the second working fluid F2. For example, when the heat transfer efficiency required by the second circulation unit 300 is low, the control unit 500 will adjust the temperature control valve 240 to increase the flow rate of the first working fluid F1 flowing through the adjustment pipeline 230, and at this time, the heat exchange The flow rate of the first working fluid F1 of the heat exchanger 100 is relatively gradually reduced, and the heat transfer efficiency of the first circulation unit 200 to the heat exchanger 100 is reduced accordingly; relatively, when the second circulation unit 300 needs a higher heat transfer efficiency, control the The unit 500 adjusts the temperature control valve 240 so that the first working fluid F1 flowing through the regulating line 230 is reduced, and even makes all the first working fluid F1 along the first supply line 210, the heat exchanger 100, and the upstream of the first return flow. The loop formed by section 222 and the first return downstream section 224 flows. Preferably, the first circulation unit 200 further includes an auxiliary valve 232 , wherein the auxiliary valve 232 is, for example, a shut-off valve, disposed on the regulating pipeline 230 and coupled to the control unit 500 . By this, The control unit 500 can control whether the first working fluid F1 passes through the adjustment pipeline 230 or the flow rate ratio of the adjustment pipeline 230 through the opening and closing of the temperature control valve 240 and the auxiliary valve 232 .

On the other hand, as shown in FIG. 2 to FIG. 4 , the second circulation unit 300 preferably further includes at least one auxiliary pump 340 . The return line 320 is used to pressurize the second working fluid F2 flowing through the heat exchanger 100 to maintain a proper flow rate of the second working fluid F2 circulating in the second circulation unit 300 . More preferably, as shown in FIG. 2 and FIG. 4 , the second circulation unit 300 further includes at least one check valve 350 , wherein the number of the check valve 350 is also two corresponding to the auxiliary pump 340 , in order to prevent the auxiliary pump 340 . The second working fluid F2 pressurized by the pump 340 flows back to the auxiliary pump 340 and the heat exchanger 100 along the second return line 320 .

Preferably, as shown in FIG. 4 , the sensing unit 600 further includes a first flow meter 640 and a second flow meter 650 , wherein the first flow meter 640 is configured in the first supply line 210 and the first return line 220, and the second flow meter 650 is disposed on one of the second supply pipeline 310 and the second return pipeline 320, and is used to detect the first working fluid F1 and the second working fluid F2 respectively The flow rate of the first circulation unit 200 and the heat transfer capacity of the second circulation unit 300 is ensured. In this embodiment, the first flow meter 640 is arranged on the first return line 220 and the second flow meter 650 is arranged on the second supply line 310 as an example, but the invention does not limit this.

Since there may be moisture in the working environment where the cooling distribution unit operates, in order to dehumidify without excessive power consumption, as shown in FIGS. 2 to 4 , the liquid replenishing unit 400 of this embodiment includes at least one condensing element 410 and a The condensed water tank 420 , wherein the condensing element 410 is disposed on the first circulation unit 200 , and the condensed water tank 420 is disposed below the condensing element 410 . Specifically, the condensing element 410 in this embodiment is, for example, a fin, and one of the first supply line 210 and the first return line 220 is passed through the condensing element 410 . Preferably, the condensing element 410 is disposed on the first supply line 210 in which the first working fluid F1 with a lower temperature flows superior. Through such a configuration, since the temperature of the first working fluid F1 is lower than the dew point temperature of the working environment, the water vapor in the working environment will automatically condense on the condensing element 410 and collect in the condensing water tank 420, so that no By installing power-consuming active dehumidification components, the effect of automatically dehumidifying the working environment can be achieved.

Furthermore, the automatic liquid replenishment cooling system 1 can not only passively condense the water vapor in the working environment through the condensing element 410 and the condensing water tank 420 , but also actively control the dehumidification efficiency. As shown in FIG. 4 , the sensing unit 600 preferably further includes a humidity sensor 630 , wherein the humidity sensor 630 is, for example, an electronic temperature and humidity sensor capable of detecting the temperature and humidity of the working environment. When the control unit 500 detects that the humidity in the current working environment is too high through the humidity sensor 630, the above-mentioned temperature control valve driver 510 can adjust the circuit through which the first working fluid F1 flows, and even transmit a signal to provide the first working fluid F1. The supply source of the working fluid F1 , such as a water ice machine, makes it output the first working fluid F1 with a lower temperature to the first supply line 210 , thereby enhancing the efficiency of condensation of water vapor on the condensing element 410 .

Since the end of the secondary side equipment connected to the second circulation unit 300 may have joint surface wetting or fluid evaporation, the second working fluid F2 is continuously reduced during the circulation process, resulting in a decrease in heat transfer capacity. For this reason, the automatic liquid replenishment cooling system 1 of the present embodiment has the capability of supplementing the second circulation unit 300 with the function of the working fluid by using the above-mentioned condensed water. As shown in FIG. 2 to FIG. 4 , the replenishing unit 400 further includes a replenishing pipeline 430 and a replenishing valve 440 , wherein the replenishing pipeline 430 is connected to the condensed water tank 420 and the second circulation unit 300 , and the replenishing valve 440 is arranged in the replenishing pipeline 430 , and the control unit 500 is coupled to the fluid replacement valve 440 . In addition, the sensing unit 600 further includes a liquid volume sensor 610, wherein the liquid volume sensor 610 is electrically connected to the control unit 500 and used to detect the liquid volume of the second working fluid F2.

In detail, as shown in FIG. 2 and FIG. 4 , the control unit 500 further includes a refill valve driver 520 for controlling the opening and closing of the refill valve 440 ; on the other hand, the liquid volume sensor 610 is, for example, disposed in the second On the working fluid storage tank 330 , the liquid level of the second working fluid F2 in the second working fluid storage tank 330 can be sensed. Therefore, when the second working fluid F2 flows through the second working fluid storage tank 330 , the liquid amount sensor 610 can immediately detect whether the liquid amount of the second working fluid F2 is insufficient. When the control unit 500 detects through the liquid volume sensor 610 that the liquid volume of the second working fluid F2 is reduced to a threshold value, the control unit 500 will open the replenishment valve 440 through the replenishment valve driver 520, so that the pre-condensed and collected in the condensed water tank 420 The condensed water flows to the second return line 320 of the second circulation unit 300 through the liquid replenishing line 430 , so as to ensure that the liquid amount of the second working fluid F2 remains constant.

Preferably, as shown in FIG. 2 to FIG. 4 , the liquid replenishing unit 400 of this embodiment further includes a pressurized pump 450 , and the pressurized pump 450 is arranged on the liquid replenishing pipeline 430 and can flow out from the condensed water tank 420 . The condensed water is pressurized to a proper water pressure and flow rate, and then sent to the second return line 320 by the liquid replenishing line 430, so as to prevent the second working fluid F2 in the second return line 320 from flowing back to the second return line 320 due to the pressure difference. Rehydration line 430. It is worth mentioning that although the pressurized pump 450 is arranged between the condensate water tank 420 and the liquid replenishment valve 440 in FIG. 4 , this new creation does not limit this. According to the actual space configuration requirements, the pressurized pump 450 is also It can be arranged between the replenishment valve 440 and the second return line 320, as long as the effect of providing proper pressure to the condensed water can be achieved.

In addition, in order to automatically discharge the condensed water stored in the condensed water tank 420 when the second circulation unit 300 does not need to replenish liquid, as shown in FIG. In addition, the drainage pipeline 460 is arranged on the liquid replenishment valve 440 . Specifically, the replenishment valve 440 in this embodiment is, for example, a three-way valve, and the replenishment pipeline 430 is divided by the replenishment valve 440 as shown in FIG. Section 432 and a downstream section 434 of the replenishment line connected between the replenishment valve 440 and the second return line 320 . When the amount of the second working fluid F2 in the second circulation unit 300 is low, the liquid replenishment valve 440 will be switched to the direction that the condensed water flows to the second circulation unit 300. At this time The condensed water will flow to the second return line 320 along the loop of the upstream section 432 of the replenishment pipeline, the replenishment valve 440 and the downstream section 434 of the replenishment pipeline, so as to supplement the liquid volume of the second working fluid F2; When the fluid volume of the fluid F2 is sufficient and there is no need for replenishment, the replenishment valve 440 will switch to make the condensed water flow to the direction of the drainage pipeline 460. At this time, the condensed water will flow along the upstream section 432 of the replenishment pipeline, the replenishment valve 440 and the drainage pipeline 460. the circuit is discharged. In this way, the process of periodically removing the condensed water collected in the condensed water tank 420 by the user can be omitted. Preferably, as shown in FIG. 4 , the rehydration unit 400 further includes a drain valve 462 , wherein the drain valve 462 is, for example, a shut-off valve, which can be closed when the automatic rehydration cooling system 1 is not in operation to further ensure the condensation in the condensate tank 420 . Water will not flow out through drain line 460 to cause damage to equipment or components.

It should be noted that although the second working fluid F2 is taken as cold water in this embodiment, and the liquid replenishment unit 400 directly inputs the condensed water into the second return line 320 through the liquid replenishment pipeline 430 and the liquid replenishment valve 440 as an example, due to the Most of the water in the second working fluid F2 is wetted or evaporated by the surface of the secondary side equipment due to the surface of the joint. Therefore, without seriously affecting the cooling efficiency and fluid properties during actual operation, the second working fluid F2 can also be A cooling fluid containing water is not limited to pure water.

The present invention has been disclosed above with preferred embodiments, but those skilled in the art should understand that the above embodiments are only used to describe the present invention, and should not be construed as limiting the scope of the present invention. And it should be noted that, all the changes and substitutions equivalent to the above-mentioned embodiments should be considered to be included in the scope of the present invention. Therefore, the protection scope of the new creation should be defined by the scope of the patent application.

1: Automatic rehydration cooling system

100: heat exchanger

200: The first cycle unit

300: Second cycle unit

400: Fluid replacement unit

500: Control Unit

600: Sensing unit

Claims (10)

An automatic replenishment cooling system, comprising: a heat exchanger; a first circulation unit connected to one side of the heat exchanger and comprising a first supply pipeline, a first return pipeline and a first working fluid, The first working fluid flows through the first supply line, the heat exchanger and the first return line in sequence; a second circulation unit is connected to the other side of the heat exchanger and includes a second Supply pipeline, a second return pipeline and a second working fluid, wherein the second working fluid flows through the second supply pipeline, the heat exchanger and the second return pipeline in sequence, and the first The temperature of the working fluid is lower than the second working fluid; a liquid replenishing unit includes at least one condensing element, a condensing water tank, a liquid replenishing pipeline and a liquid replenishing valve, the at least one condensing element is arranged on the first circulation unit, the The condensate water tank is arranged below the at least one condensing element, the liquid replenishment pipeline is connected to the condensed water tank and the second circulation unit, and the liquid replenishment valve is arranged on the liquid replenishment pipeline; a control unit is coupled to the liquid replenishment valve; and a sensing unit including a liquid quantity sensor, the liquid quantity sensor is electrically connected to the control unit and used for detecting the liquid quantity of the second working fluid. The automatic replenishment cooling system as claimed in claim 1, wherein the first circulation unit further comprises a temperature control valve and a regulating pipeline, wherein the temperature control valve is arranged on the first supply One of the pipeline and the first return pipeline is coupled to the control unit, and the adjustment pipeline is connected to the temperature control valve and the other of the first supply pipeline and the first return pipeline Meanwhile, the sensing unit further includes a temperature sensor, wherein the temperature sensor is electrically connected to the control unit and used for detecting the temperature of the second working fluid. The automatic replenishment cooling system according to claim 1, wherein the second circulation unit further comprises a second working fluid storage tank and an exhaust valve, the second working fluid storage tank is disposed on the second supply pipeline, and The liquid amount sensor and the exhaust valve are arranged on the second working fluid storage tank. The automatic liquid replenishment cooling system according to claim 1, wherein the second circulation unit further comprises at least one auxiliary pump, and the at least one auxiliary pump is disposed on the second return line. The automatic replenishment cooling system according to claim 1, wherein the at least one condensing element is disposed on the first supply pipeline, and one end of the replenishment pipeline is connected to the second return pipeline. The automatic replenishment cooling system according to claim 1, wherein the at least one condensing element is a fin, and one of the first supply line and the first return line passes through the at least one condensing element. The automatic liquid supplement cooling system according to claim 1, wherein the liquid supplement unit further comprises a pressurized pump, and the pressurized pump is arranged on the liquid supplement pipeline. The automatic liquid replenishment cooling system according to claim 1, wherein the liquid replenishment unit further comprises a drainage pipeline, the replenishment valve is a three-way valve, and the drainage pipeline is arranged on the replenishment valve. The automatic replenishment cooling system according to claim 1, wherein the sensing unit further comprises a first flowmeter and a second flowmeter, the first flowmeter is configured on the first supply pipeline and the first return pipeline on one of the pipelines, and the second flow meter is configured on one of the second supply pipeline and the second return pipeline. The automatic replenishment cooling system according to claim 1, wherein the heat exchanger is a plate heat exchanger.

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