A universal high-precision two-stage liquid cooling source based on standardization

Abstract

The present invention discloses a universal high-precision secondary liquid cooling source based on standardization, including a circulating medium, a temperature control module, a conveying module, a reflux module, a heat exchange device and a liquid cooling device; the circulation pipeline of the circulating medium is connected with a temperature control module and a conveying module, the conveying module conveys the circulating medium after temperature control to the liquid supply port interface, the circulating medium enters the external device through the liquid supply port interface, flows out through the liquid return port interface after passing through the external device, the circulating medium refluxes to the reflux module through the liquid return port interface, the reflux module is connected with the heat exchange device, the heat exchange device is connected with the temperature control module, and the liquid cooling device cools the circulating medium by cooling the heat exchange device. The present invention can quickly achieve the purpose of controlling the temperature accuracy of the liquid supply of the external device by the secondary liquid cooling source.

Description

Technical Field

[0001] The invention belongs to the field of aerospace liquid cooling sources, and in particular relates to a universal high-precision secondary liquid cooling source based on standardization. Background Art

[0002] Liquid cooling source is a commonly used device that provides a certain temperature, pressure, and flow rate of cooling fluid for liquid-cooled equipment. It has been widely used due to its high cooling efficiency and relatively simple technology. It accounts for a large proportion of the cooling of aerospace supporting equipment, especially the thermal control equipment in various test units, modules, and systems, such as cabinets, high-power electronic devices, etc., which all require cooling fluids for equipment cooling. At present, there are three main types of liquid cooling sources on the market: (1) Liquid cooling sources for laser welding, material forming, mechanical cutting, etc.; (2) Liquid cooling sources for cooling PC CPUs, graphics cards, memory, and hard disks in the DIY market; (3) Liquid cooling sources for telecommunications racks. Although the working principles of the above products are similar, their use conditions, cooling capacity, electrical control, and mechanical structure are very different. They are only suitable for specific occasions and cannot be used universally.

[0003] Due to the particularity of aerospace supporting equipment: (1) There are many types, and factors such as environmental conditions and mechanical structures will vary with the different application requirements of the equipment. When configuring liquid cooling sources for these devices, the mechanical interfaces, electrical interfaces, and pipe interfaces all need to be redesigned and customized, which requires a long design and manufacturing cycle and high costs; (2) There are stringent requirements on the working fluids connected to the equipment. The composition of any working fluid connected to aerospace supporting equipment must not be changed during use, and all raw materials in contact with the working fluid must meet compatibility requirements and cleanliness requirements. However, the relevant indicators of liquid cooling sources on the market are difficult to meet the relevant requirements, so it is necessary to strictly control the products connected to aerospace supporting equipment. In order to realize the large-scale promotion and application of liquid cooling sources in aerospace supporting equipment, it is urgent to develop a universal liquid cooling source system.

[0004] In the prior art, a single liquid cooling source device is often used to adjust the temperature, and the single liquid cooling source device uses a single-stage compressor start-stop method to control the temperature accuracy. This start-stop method will definitely affect the life of the single-stage compressor. Moreover, during the refrigeration process of the single-stage compressor, when the temperature reaches the set value, the single-stage compressor is frequently started and stopped for switching, and the thermal inertia is large, resulting in large temperature fluctuations of the cooling medium, which has an adverse effect on external equipment. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a universal high-precision two-stage liquid cooling source based on standardization in view of the shortcomings of the prior art.

[0006] The technical solution for realizing the present invention is:

[0007] The present invention discloses a universal high-precision secondary liquid cooling source based on standardization, comprising a circulating working fluid, a temperature control module, a conveying module, a reflux module, a heat exchange device and a liquid cooling device; the circulation pipeline of the circulating working fluid is connected with a temperature control module and a conveying module, the conveying module conveys the circulating working fluid after temperature control to the liquid supply port interface, the circulating working fluid enters the external device through the liquid supply port interface, flows out through the liquid return port interface after passing through the external device, the circulating working fluid refluxes to the reflux module through the liquid return port interface, the reflux module is connected with the heat exchange device, the heat exchange device is connected with the temperature control module, and the liquid cooling device cools the circulating working fluid by cooling the temperature through the heat exchange device.

[0008] Preferably, the heat exchange device includes a two-layer water exchange tank, the cooling working fluid of the liquid cooling device is transported to the lower layer of the water exchange tank, and the circulating working fluid is transported to the upper layer of the water exchange tank. The cooling working fluid located in the lower layer of the water exchange tank cools the circulating working fluid located in the upper layer of the water exchange tank through heat exchange, and the liquid cooling device cools the circulating working fluid through the water exchange tank. The cooling temperature of the cooling working fluid can be set by the liquid cooling device, and the temperature of the circulating working fluid can be better adjusted. The upper and lower layers of the water exchange tank can separate the circulating working fluid and the cooling working fluid from each other, and only the circulating working fluid in the upper layer of the water exchange tank is connected with the external equipment, thereby achieving compatibility; the cooling working fluid of the liquid cooling device carries the circulating working fluid flowing through the external equipment through the water exchange tank, so that the liquid cooling device reaches the set temperature, and the circulating working fluid is not overcooled, so that the liquid supply temperature of the circulating working fluid cannot reach the required temperature of the external equipment.

[0009] Preferably, the temperature control module includes a temperature control water tank, a heating device and a temperature controller; the temperature control water tank is installed on the circulation pipeline of the circulating working medium, the temperature control water tank is installed with a heating device, and the thermostat adjusts the temperature of the temperature control water tank by controlling the opening and closing of the heating device.

[0010] Preferably, a relay is provided on the connection circuit between the temperature controller and the heating device, and the provision of a safety switch relay can better ensure the safe use of the heating device.

[0011] Preferably, the delivery module includes a diaphragm pump, a first pressure sensor and a temperature sensor, and the diaphragm pump, the first pressure sensor and the temperature sensor are installed in sequence on the circulation pipeline of the delivery module, a buffer tank is connected between the diaphragm pump and the first pressure sensor, a filter is provided between the temperature sensor and the liquid supply port interface, the temperature sensor measures the liquid supply temperature of the circulating working fluid and feeds it back to the temperature controller, the thermostat controls the opening and closing of the heating device according to the liquid supply temperature to adjust the temperature of the temperature-controlled water tank, and the buffer tank is arranged behind the flow direction of the circulating working fluid of the diaphragm pump, that is, the buffer tank is placed at the outlet of the diaphragm pump. The buffer tank can maintain the stability of the pressure and flow of the circulating working fluid, eliminate the vibration of the circulation pipeline, and protect the instruments and equipment downstream of the diaphragm pump; the filter can further filter the circulating working fluid to meet the cleanliness requirements of the external equipment.

[0012] Preferably, the reflux module includes a second pressure sensor and a flow meter. The second pressure sensor is installed on the reflux pipeline of the reflux module. The second pressure sensor is installed with a flow meter between the heat exchange device. The flow meter is used to monitor the flow of the circulating working fluid in the reflux module and has the advantages of simple use and easy reading.

[0013] Preferably, it also includes a host computer and an alarm module. The host computer communicates with the temperature controller, the diaphragm pump speed regulator, the first pressure sensor and the second pressure sensor through a communication module. The host computer sets the corresponding temperature for the thermostat according to the temperature required by the external device, and monitors the temperature of the circulating working fluid according to the supply temperature of the circulating working fluid fed back by the thermostat. The host computer regulates the flow rate of the circulating working fluid through the diaphragm pump speed regulator. The host computer monitors the pressure and pressure difference of the circulating working fluid in real time through the data signals transmitted by the first pressure sensor and the second pressure sensor. When the temperature, pressure and pressure difference of the circulating working fluid are higher than the warning value set by the host computer, the host computer issues an alarm through the alarm module and displays corresponding fault information.

[0014] Preferably, the alarm module includes a speaker alarm and / or an indicator light alarm, which can attract the attention of supervisors auditorily and visually, so that fault information can be quickly checked.

[0015] Preferably, the circulating working fluid is an ethylene glycol aqueous solution.

[0016] Preferably, the liquid cooling device is a single liquid cooling source device, the heat exchange device, temperature control module, delivery module and reflux module are connected by a hose, the circulation of the circulating working fluid is connected to the external device through the hose, and the hose and the circulating working fluid have good compatibility.

[0017] The present invention can adjust the target temperature of the external device according to the different load requirements of different external devices. When the set temperature of the thermostat is the required temperature of the external device, in order to make the temperature control accuracy of the thermostat reach the ideal requirement, it can be achieved by adjusting the set temperature of the liquid cooling device. That is, if the temperature control accuracy of the thermostat exceeds the ideal value of the external device, the excess part can be compensated by resetting the set temperature of the liquid cooling device, so as to achieve the ideal temperature control accuracy requirement of the external device. Through the coordinated use of the thermostat and the liquid cooling device in the whole device, it is possible to adapt to the requirements of different external device loads.

[0018] By utilizing the above technical solution, the present invention has the following beneficial effects:

[0019] (1) The liquid cooling device in the present invention exchanges heat with the circulating working fluid through the heat exchange device to cool the circulating working fluid, and then heats the circulating working fluid to the required temperature of the external device through the temperature control module. The temperature control accuracy can reach ±0.2°C. The use of liquid cooling equipment and heat exchange devices in series can achieve the purpose of controlling the temperature accuracy of the liquid supply, thereby shortening the development cycle, reducing production costs, and facilitating the realization of standardized, universal, and combined production requirements.

[0020] (2) The heat exchange device in the present invention adopts an upper and lower layer of heat exchange water tanks. The circulating working fluid is located in the upper layer of the heat exchange water tank and contacts the external equipment. The cooling working fluid is located in the lower layer of the heat exchange water tank. The circulating working fluid and the cooling working fluid are completely separated from each other. Only the circulating working fluid contacts the external equipment. The raw materials in contact with the circulating working fluid meet the compatibility requirements. This can effectively avoid the introduction of pollutants into the external equipment due to electrochemical corrosion caused by the mixing of copper and aluminum between the traditional copper pipe-connected liquid cooling equipment and the external equipment made of aluminum material, thereby meeting the cleanliness and compatibility requirements of the external equipment.

[0021] (3) The host computer in the present invention communicates with the temperature controller, the diaphragm pump speed regulator, the first pressure sensor and the second pressure sensor through a communication module, and is also provided with an alarm module. The host computer sets the corresponding temperature for the temperature controller according to the temperature required by the external device, and monitors the temperature of the circulating working fluid according to the supply temperature of the circulating working fluid fed back by the thermostat. The host computer controls the flow of the circulating working fluid through the diaphragm pump speed regulator. The host computer monitors the pressure and pressure difference of the circulating working fluid in real time through the data signals transmitted by the first pressure sensor and the second pressure sensor. When the temperature, pressure and pressure difference of the circulating working fluid are higher than the warning values ​​set by the host computer, the host computer issues an alarm through the alarm module and displays corresponding fault information. The host computer of the present invention obtains the data signals of the temperature controller, the diaphragm pump speed regulator, the first pressure sensor and the second pressure sensor through the communication module, and intelligently monitors the temperature, pressure and pressure difference of the circulating working fluid in real time by analyzing and monitoring the obtained data signals. When fault information occurs, the alarm is issued through the alarm module, so that the fault can be eliminated in time, and the operation safety of the equipment can be ensured in real time, and the safety and reliability are very high. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein:

[0023] Figure 1 This is a structural block diagram of the secondary liquid cooling source of the present invention;

[0024] Figure 2 This is a block diagram of the host computer described in the present invention.

[0025] In the figure, 1-liquid cooling equipment, 2-external equipment, 3-heat exchange water tank, 4-temperature control water tank, 41-heating plate, 42-relay, 43-thermostat, 5-diaphragm pump, 6-buffer tank, 7-first pressure sensor, 8-temperature sensor, 9-filter, 10-second pressure sensor, 11-flow meter, 12-host computer. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0027] Embodiment: A universal high-precision secondary liquid cooling source based on standardization includes a circulating working fluid, a temperature control module, a conveying module, a reflux module, a heat exchange device and a liquid cooling device 1; the circulation pipeline of the circulating working fluid is connected with a temperature control module and a conveying module, the conveying module conveys the circulating working fluid after temperature control to the liquid supply port interface, the circulating working fluid enters the external device 2 through the liquid supply port interface, flows out through the liquid return port interface after passing through the external device 2, and the circulating working fluid refluxes to the reflux module through the liquid return port interface, the reflux module is connected with the heat exchange device, the heat exchange device is connected with the temperature control module, and the liquid cooling device 1 cools the circulating working fluid by cooling the heat exchange device.

[0028] In this embodiment, the circulating working fluid is preferably ethylene glycol aqueous solution, such as Figure 1As shown, the temperature control module includes a temperature control water tank 4, a heating device and a temperature controller 43, the delivery module includes a diaphragm pump 5, a buffer tank 6, a first pressure sensor 7, a temperature sensor 8 and a filter 9, the reflux module includes a second pressure sensor 10 and a flow meter 11, and the heat exchange device includes a two-layer heat exchange water tank; wherein the temperature control water tank 4, the diaphragm pump 5, the buffer tank 6, the first pressure sensor 7, the temperature sensor 8 and the filter 9 are connected in sequence through a hose, and a liquid supply port interface is provided at the tail end of the filter, and the circulating working medium is connected to the liquid supply port interface through the liquid supply port interface The external device 2 flows, and then flows back to the liquid return port interface through the external device 2. The liquid return port interface and the heat exchange water tank are connected in turn through a hose, and a second pressure sensor 10 and a flow meter 11 are provided. The heat exchange water tank 3 flows through the hose and the temperature control water tank 4. The heat exchange water tank 3 is provided with two layers. The circulating medium circulates through the upper layer of the heat exchange water tank 3, passes through the temperature control water tank 4, the diaphragm pump 5, the buffer tank 6, the first pressure sensor 7, the temperature sensor 8, the filter 9, the external device 2, the second pressure sensor 10, the flow meter 11, and finally returns. The water flows to the upper layer of the heat exchange water tank 3 and then continues to circulate. A heating device is installed on the temperature control water tank. The heating device preferably adopts a heating plate 41. The thermostat 43 is electrically connected to the heating plate 41. The thermostat 43 adjusts the temperature of the temperature control water tank 4 by controlling the opening and closing of the heating plate 41. In order to safely protect the heating plate 41, a relay 42 is set on the connection circuit between the thermostat 43 and the heating plate. The temperature sensor 8 can measure the supply temperature of the circulating working fluid in real time. The measured supply temperature of the circulating working fluid is fed back to the temperature sensor 8. The temperature controller 43 controls the opening and closing of the heating plate 41 according to the liquid supply temperature, thereby adjusting the temperature of the temperature-controlled water tank 4; in the delivery module, the buffer tank 6 is arranged behind the flow direction of the circulating working medium of the diaphragm pump 5, that is, the buffer tank 6 is placed at the outlet of the diaphragm pump 5 to buffer the pulsation of the diaphragm pump. The buffer tank 6 maintains the stability of the pressure and flow of the circulating working medium, eliminates the vibration of the circulation pipeline, and protects the downstream instruments and equipment of the diaphragm pump 5. The diaphragm pump 5 delivers the circulating working medium to the external equipment. The diaphragm pump 5 preferably uses KNF's NF300 KTDC 24V diaphragm pump, with a maximum output flow of 3L / min, a suction head of 3m, and a head of 10m. The actual output flow of the diaphragm pump can be adjusted by setting the PWM duty cycle to drive the diaphragm pump speed regulator to linearly adjust the flow resistance characteristics of the circulating working fluid itself to match the heat consumption of the circulating working fluid under different working conditions; the diaphragm pump 5 can transport corrosive liquids and has good compatibility with the circulating working fluid, and its flow rate can be adjusted and maintained within the required range; in order to ensure that the transported circulating working fluid can meet the cleanliness requirements, the filter 11 preferably uses a filter with a filtration accuracy of 5um; the flowmeter 11 located on the reflux module uses a corrosion-resistant glass float flowmeter to monitor the flow of the circulating working fluid, which has the advantages of reliable performance, simple use, and convenient reading.

[0029] The material of the heat exchange water tank 3 is 2A12 aluminum alloy, and adopts a brazed water-cooled plate heat exchange structure, which is divided into an upper and lower layer. The upper layer of the heat exchange water tank is used for circulating working fluid, and the circulating working fluid is used to be transported to external equipment. The liquid cooling device 1 adopts a single liquid cooling source device, and the cooling working fluid of the liquid cooling device is ethylene glycol aqueous solution. The cooling working fluid of the liquid cooling device 1 is transported to the lower layer of the heat exchange water tank 3, and the circulating working fluid is transported to the upper layer of the heat exchange water tank 3. The cooling working fluid located in the lower layer of the heat exchange water tank 3 cools the circulating working fluid located in the upper layer of the heat exchange water tank 3 through heat exchange. The liquid cooling device 1 cools the circulating working fluid through the heat exchange water tank 3. By separating the circulating working fluid and the cooling working fluid from each other, only the circulating working fluid in the upper layer of the heat exchange water tank 3 is in contact with the external equipment, thereby achieving the compatibility requirements. The cooling temperature of the cooling working fluid can be set through the liquid cooling device 1, which can better adjust The temperature of the circulating working fluid, the cooling working fluid of the liquid cooling equipment takes away the heat of the circulating working fluid flowing through the external equipment through the heat exchange water tank, so that the liquid cooling equipment reaches the set temperature, and the circulating working fluid is not overcooled, so that the supply temperature of the circulating working fluid cannot reach the required temperature of the external equipment; the upper and lower layers of the heat exchange water tank 3 can separate the circulating working fluid and the cooling working fluid from each other, and only the circulating working fluid in the upper layer of the heat exchange water tank 3 is in contact with the external equipment 2, so as to achieve compatibility. Since the conventional single liquid cooling source equipment adopts single-stage compressor refrigeration, the circulation pipeline of the cooling working fluid is connected by a copper pipe, and the connecting pipeline of the circulating working fluid is connected by a hose, and the main material composition of the external equipment is aluminum material, since the heat exchange water tank completely separates the heat exchange of the circulating working fluid and the cooling working fluid, it can effectively avoid the electrochemical corrosion caused by the mixing of copper and aluminum and the introduction of pollutants to the external equipment.

[0030] As attached Figure 2As shown, the present embodiment also includes a host computer 12 and an alarm module. The host computer 12 communicates with the temperature controller 43, the diaphragm pump speed regulator, the first pressure sensor 7 and the second pressure sensor 10 through a communication module. The communication module can preferably use an RS485 communication module. The working process of the host computer is as follows: after the equipment in the embodiment is powered on, first, turn on the host computer 12 to ensure that the RS485 communication between the temperature controller 2, the diaphragm pump speed regulator, the first pressure sensor 7, the second pressure sensor 10 and the host computer is normal. Secondly, set the corresponding temperature for the temperature controller 43 according to the temperature required by the external device, and set a certain duty cycle for the diaphragm pump speed regulator according to the required flow rate of the circulating working fluid. At this time, the diaphragm pump 5 is turned on, and the entire device starts to work. At the same time, the temperature sensor 8 detects the liquid supply temperature of the circulating working fluid. If the liquid supply temperature is less than the set temperature of the thermostat, the heating plate 41 is placed in the heating mode, and the temperature of the circulating working fluid rises; when the temperature of the circulating working fluid rises to the set temperature, the thermostat 43 turns off the heating plate 41 and stops heating the circulating working fluid; the host computer 12 The data signals transmitted by the first pressure sensor 7 and the second pressure sensor 10 monitor the pressure and pressure difference of the circulating working fluid in real time. When the temperature, pressure and pressure difference of the circulating working fluid are higher than the warning value set by the host computer 12, the host computer 12 alarms through the alarm module and displays the corresponding fault information. The alarm module includes a speaker alarm and an indicator alarm. The speaker alarm and the indicator alarm can attract the attention of the supervisor from the auditory and visual aspects, so as to quickly check the fault information; the temperature, pressure and pressure difference of the circulating working fluid are monitored in real time by the host computer 12 to ensure the operation safety of the equipment in real time. The host computer 12 controls the temperature of the cooling circulating working fluid in the secondary liquid cooling source module through the thermostat 43, the temperature sensor 8 and the heating plate 41. The host computer 12 can also monitor the inlet and outlet pressures of the circulating working fluid and the temperature of the circulating working fluid at the outlet in real time. The host computer 12 sets different duty ratios for the diaphragm pump speed regulator to adjust the internal flow of the circulating working fluid in the device, so as to linearly adjust the flow resistance characteristics of the device itself to match the heat consumption of different working conditions of the device. By setting up comprehensive protection functions such as thermal overload protection for the water exchange tank and the temperature control water tank and water hammer protection for the pump on the upper computer, the safety and reliability of the entire equipment are improved.

[0031] In this embodiment, the working process of using the secondary liquid cooling source to control the target temperature of the external device is as follows:

[0032] Step 1, connect the circulating working fluid in the device with the external device, and exchange heat between the cooling working fluid of the liquid cooling device and the circulating working fluid through the heat exchange water tank. According to the required temperature T0 of the external device, set the temperature of the thermostat to T0. The set temperature of the liquid cooling device is less than the set temperature of the secondary liquid cooling source module, which is set to T1. The initial setting △T=T0-T1=3; after the initial temperature of the liquid cooling device and the thermostat is set, the liquid cooling device, the thermostat and the external device start to work. When the temperature of the liquid cooling device and the thermostat reaches stability, at this time, the temperature of the liquid cooling device is measured to be T1, and the temperature of the thermostat is T2. Therefore, it can be clearly concluded that the temperature error between the thermostat temperature T2 and the target temperature T0 of the external device is T0-T2. According to the temperature control accuracy requirement of the target temperature of the external device, it is judged whether the temperature error T0-T2 meets the requirements, and then it is judged whether the temperature of the thermostat meets the corresponding requirements;

[0033] Step 2: According to the comparison result in step 1, if the temperature of the thermostat does not meet the corresponding requirements, the temperature value T1 of the liquid cooling device is reset to T3. At this time, the temperature value of the thermostat after stabilization is T4. Repeat the comparison method in step 1 to obtain the result until the nth time. The temperature error T0-T 2n Meet the temperature control accuracy requirements of the external device target temperature. After the nth adjustment, T 2n is the temperature value after the thermostat stabilizes, T 2n-1 The optimum temperature value after adjustment for the liquid cooling equipment;

[0034] Step 3: Based on the control results in step 2, the appropriate temperature difference between the liquid cooling device and the temperature controller is T0-T 2n-1 At this time, the target temperature of the external device is controlled by the combined control of the liquid cooling device and the temperature controller.

[0035] This embodiment can adjust the target temperature of the external device according to the different load requirements of different external devices. When the set temperature of the thermostat is the temperature required by the external device, in order to make the temperature control accuracy of the thermostat meet the ideal requirements, it can be achieved by adjusting the set temperature of the liquid cooling device. That is, if the temperature control accuracy of the thermostat exceeds the ideal value, the excess can be compensated by resetting the set temperature of the liquid cooling device, thereby achieving the ideal temperature control accuracy requirement of the external device. Through the coordinated use of the thermostat and the liquid cooling device in the entire device, it is possible to adapt to the requirements of different external device loads.

[0036] The secondary liquid cooling source in this embodiment can meet the requirements of aerospace supporting equipment. By combining with liquid cooling equipment, the requirements of aerospace supporting equipment for the cleanliness, compatibility and high precision of the liquid cooling source can be quickly realized, thereby shortening the development cycle, reducing production costs, and facilitating standardization, generalization and combination.

[0037] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and details may be made without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A universal high-precision two-stage liquid cooling source based on standardization, characterized in that: It includes a circulating working medium, a temperature control module, a conveying module, a reflux module, a heat exchange device and a liquid cooling device; the circulation pipeline of the circulating working medium is connected with the temperature control module and the conveying module, the conveying module conveys the circulating working medium after temperature control to the liquid supply port interface, the circulating working medium enters the external device through the liquid supply port interface, flows out through the liquid return port interface after passing through the external device, the circulating working medium refluxes to the reflux module through the liquid return port interface, the reflux module is connected with the heat exchange device, the heat exchange device is connected with the temperature control module, and the liquid cooling device cools the circulating working medium by cooling the temperature of the heat exchange device; The temperature control module includes a temperature control water tank, a heating device and a temperature controller; the temperature control water tank is installed on the circulation pipeline of the circulating medium, the temperature control water tank is installed with a heating device, and the temperature controller adjusts the temperature of the temperature control water tank by controlling the opening and closing of the heating device; The working process of the secondary liquid cooling source regulating the target temperature of the external device is as follows: Step 1, connect the circulating working fluid in the device with the external device, and exchange heat between the cooling working fluid of the liquid cooling device and the circulating working fluid through the heat exchange water tank. According to the required temperature T0 of the external device, set the temperature of the thermostat to T0. The set temperature of the liquid cooling device is less than the set temperature of the secondary liquid cooling source module, which is set to T1. The initial setting △T=T0-T1=3; after the initial temperature of the liquid cooling device and the thermostat is set, the liquid cooling device, the thermostat and the external device start to work. When the temperature of the liquid cooling device and the thermostat reaches stability, at this time, the temperature of the liquid cooling device is measured to be T1, and the temperature of the thermostat is T2. Therefore, it can be clearly concluded that the temperature error between the thermostat temperature T2 and the target temperature T0 of the external device is T0-T2. According to the temperature control accuracy requirement of the target temperature of the external device, it is judged whether the temperature error T0-T2 meets the requirements, and then it is judged whether the temperature of the thermostat meets the corresponding requirements; Step 2: According to the comparison result in step 1, if the temperature of the thermostat does not meet the corresponding requirements, the temperature value T1 of the liquid cooling device is reset to T3. At this time, the temperature value of the thermostat after stabilization is T4. Repeat the comparison method in step 1 to obtain the result until the nth time, the temperature error T0-T 2n Meet the temperature control accuracy requirements of the external device target temperature. After the nth adjustment, T 2n is the temperature value after the thermostat stabilizes, T 2n-1 The optimum temperature value after adjustment for the liquid cooling equipment; Step 3: According to the control result in step 2, the appropriate temperature difference between the liquid cooling device and the temperature controller is T0-T 2n-1 At this time, the target temperature of the external device is controlled by the combined control of the liquid cooling device and the temperature controller.

2. A universal high-precision two-stage liquid cooling source based on standardization according to claim 1, characterized in that: The heat exchange device includes a two-layer water exchange tank. The cooling medium of the liquid cooling equipment is transported to the lower layer of the water exchange tank, and the circulating medium is transported to the upper layer of the water exchange tank. The cooling medium located in the lower layer of the water exchange tank cools the circulating medium located in the upper layer of the water exchange tank through heat exchange.

3. A universal high-precision two-stage liquid cooling source based on standardization according to claim 1, characterized in that: A relay is provided on the connection circuit between the temperature controller and the heating device.

4. A universal high-precision two-stage liquid cooling source based on standardization according to claim 1, characterized in that: The delivery module includes a diaphragm pump, a first pressure sensor and a temperature sensor. The diaphragm pump, the first pressure sensor and the temperature sensor are installed in sequence on the circulation pipeline of the delivery module. A buffer tank is connected between the diaphragm pump and the first pressure sensor. A filter is provided between the temperature sensor and the liquid supply port interface. The temperature sensor measures the liquid supply temperature of the circulating working fluid and feeds it back to the temperature controller. The temperature controller controls the opening and closing of the heating device according to the liquid supply temperature to adjust the temperature of the temperature-controlled water tank.

5. A universal high-precision two-stage liquid cooling source based on standardization according to claim 4, characterized in that: The reflux module comprises a second pressure sensor and a flow meter. The second pressure sensor is installed on the reflux pipeline of the reflux module. The flow meter is installed between the second pressure sensor and the heat exchange device.

6. A universal high-precision two-stage liquid cooling source based on standardization according to claim 5, characterized in that: It also includes a host computer and an alarm module. The host computer communicates with the temperature controller, the diaphragm pump speed regulator, the first pressure sensor and the second pressure sensor through the communication module. The host computer sets the corresponding temperature for the thermostat according to the temperature required by the external device, and monitors the temperature of the circulating working fluid according to the supply temperature of the circulating working fluid fed back by the thermostat. The host computer regulates the flow of the circulating working fluid through the diaphragm pump speed regulator. The host computer monitors the pressure and pressure difference of the circulating working fluid in real time through the data signals transmitted by the first pressure sensor and the second pressure sensor. When the temperature, pressure and pressure difference of the circulating working fluid are higher than the warning value set by the host computer, the host computer issues an alarm through the alarm module and displays corresponding fault information.

7. A universal high-precision two-stage liquid cooling source based on standardization according to claim 6, characterized in that: The alarm module includes a speaker alarm and / or an indicator light alarm.

8. A universal high-precision two-stage liquid cooling source based on standardization according to claim 1, characterized in that: The circulating working fluid is ethylene glycol aqueous solution.

9. A universal high-precision two-stage liquid cooling source based on standardization according to claim 1, characterized in that: The liquid cooling device is a single liquid cooling source device, and the heat exchange device, the temperature control module, the conveying module and the reflux module are connected by a hose.

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